options.c

   1 /*
   2  * Command-line (and received via daemon-socket) option parsing.
   3  *
   4  * Copyright (C) 1998-2001 Andrew Tridgell <tridge@samba.org>
   5  * Copyright (C) 2000, 2001, 2002 Martin Pool <mbp@samba.org>
   6  * Copyright (C) 2002-2020 Wayne Davison
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, visit the http://fsf.org website.
  20  */
  21
  22 #include "rsync.h"
  23 #include "itypes.h"
  24 #include "ifuncs.h"
  25 #include "latest-year.h"
  26 #include <popt.h>
  27
  28 extern int module_id;
  29 extern int local_server;
  30 extern int sanitize_paths;
  31 extern int daemon_over_rsh;
  32 extern unsigned int module_dirlen;
  33 extern struct name_num_obj valid_checksums;
  34 extern struct name_num_obj valid_compressions;
  35 extern filter_rule_list filter_list;
  36 extern filter_rule_list daemon_filter_list;
  37
  38 int make_backups = 0;
  39
  40 /**
  41  * If 1, send the whole file as literal data rather than trying to
  42  * create an incremental diff.
  43  *
  44  * If -1, then look at whether we're local or remote and go by that.
  45  *
  46  * @sa disable_deltas_p()
  47  **/
  48 int whole_file = -1;
  49
  50 int append_mode = 0;
  51 int keep_dirlinks = 0;
  52 int copy_dirlinks = 0;
  53 int copy_links = 0;
  54 int write_devices = 0;
  55 int preserve_links = 0;
  56 int preserve_hard_links = 0;
  57 int preserve_acls = 0;
  58 int preserve_xattrs = 0;
  59 int preserve_perms = 0;
  60 int preserve_executability = 0;
  61 int preserve_devices = 0;
  62 int preserve_specials = 0;
  63 int preserve_uid = 0;
  64 int preserve_gid = 0;
  65 int preserve_times = 0;
  66 int preserve_atimes = 0;
  67 int preserve_crtimes = 0;
  68 int update_only = 0;
  69 int open_noatime = 0;
  70 int cvs_exclude = 0;
  71 int dry_run = 0;
  72 int do_xfers = 1;
  73 int ignore_times = 0;
  74 int delete_mode = 0;
  75 int delete_during = 0;
  76 int delete_before = 0;
  77 int delete_after = 0;
  78 int delete_excluded = 0;
  79 int remove_source_files = 0;
  80 int one_file_system = 0;
  81 int protocol_version = PROTOCOL_VERSION;
  82 int sparse_files = 0;
  83 int preallocate_files = 0;
  84 int do_compression = 0;
  85 int do_compression_level = CLVL_NOT_SPECIFIED;
  86 int am_root = 0; /* 0 = normal, 1 = root, 2 = --super, -1 = --fake-super */
  87 int am_server = 0;
  88 int am_sender = 0;
  89 int am_starting_up = 1;
  90 int relative_paths = -1;
  91 int implied_dirs = 1;
  92 int missing_args = 0; /* 0 = FERROR_XFER, 1 = ignore, 2 = delete */
  93 int numeric_ids = 0;
  94 int msgs2stderr = 2; /* Default: send errors to stderr for local & remote-shell transfers */
  95 int allow_8bit_chars = 0;
  96 int force_delete = 0;
  97 int io_timeout = 0;
  98 int prune_empty_dirs = 0;
  99 int use_qsort = 0;
 100 char *files_from = NULL;
 101 int filesfrom_fd = -1;
 102 char *filesfrom_host = NULL;
 103 int eol_nulls = 0;
 104 int protect_args = -1;
 105 int human_readable = 1;
 106 int recurse = 0;
 107 int mkpath_dest_arg = 0;
 108 int allow_inc_recurse = 1;
 109 int xfer_dirs = -1;
 110 int am_daemon = 0;
 111 int connect_timeout = 0;
 112 int keep_partial = 0;
 113 int safe_symlinks = 0;
 114 int copy_unsafe_links = 0;
 115 int munge_symlinks = 0;
 116 int size_only = 0;
 117 int daemon_bwlimit = 0;
 118 int bwlimit = 0;
 119 int fuzzy_basis = 0;
 120 size_t bwlimit_writemax = 0;
 121 int ignore_existing = 0;
 122 int ignore_non_existing = 0;
 123 int need_messages_from_generator = 0;
 124 int max_delete = INT_MIN;
 125 OFF_T max_size = -1;
 126 OFF_T min_size = -1;
 127 int ignore_errors = 0;
 128 int modify_window = 0;
 129 int blocking_io = -1;
 130 int checksum_seed = 0;
 131 int inplace = 0;
 132 int delay_updates = 0;
 133 int32 block_size = 0;
 134 time_t stop_at_utime = 0;
 135 char *skip_compress = NULL;
 136 char *copy_as = NULL;
 137 item_list dparam_list = EMPTY_ITEM_LIST;
 138
 139 /** Network address family. **/
 140 int default_af_hint
 141 #ifdef INET6
 142         = 0;            /* Any protocol */
 143 #else
 144         = AF_INET;      /* Must use IPv4 */
 145 # ifdef AF_INET6
 146 #  undef AF_INET6
 147 # endif
 148 # define AF_INET6 AF_INET /* make -6 option a no-op */
 149 #endif
 150
 151 /** Do not go into the background when run as --daemon.  Good
 152  * for debugging and required for running as a service on W32,
 153  * or under Unix process-monitors. **/
 154 int no_detach
 155 #if defined _WIN32 || defined __WIN32__
 156         = 1;
 157 #else
 158         = 0;
 159 #endif
 160
 161 int write_batch = 0;
 162 int read_batch = 0;
 163 int backup_dir_len = 0;
 164 int backup_suffix_len;
 165 unsigned int backup_dir_remainder;
 166
 167 char *backup_suffix = NULL;
 168 char *tmpdir = NULL;
 169 char *partial_dir = NULL;
 170 char *basis_dir[MAX_BASIS_DIRS+1];
 171 char *config_file = NULL;
 172 char *shell_cmd = NULL;
 173 char *logfile_name = NULL;
 174 char *logfile_format = NULL;
 175 char *stdout_format = NULL;
 176 char *password_file = NULL;
 177 char *early_input_file = NULL;
 178 char *rsync_path = RSYNC_PATH;
 179 char *backup_dir = NULL;
 180 char backup_dir_buf[MAXPATHLEN];
 181 char *sockopts = NULL;
 182 char *usermap = NULL;
 183 char *groupmap = NULL;
 184 int rsync_port = 0;
 185 int alt_dest_type = 0;
 186 int basis_dir_cnt = 0;
 187
 188 #define DEFAULT_MAX_ALLOC (1024L * 1024 * 1024)
 189 size_t max_alloc = DEFAULT_MAX_ALLOC;
 190 char *max_alloc_arg;
 191
 192 static int version_opt_cnt = 0;
 193 static int remote_option_alloc = 0;
 194 int remote_option_cnt = 0;
 195 const char **remote_options = NULL;
 196 const char *checksum_choice = NULL;
 197 const char *compress_choice = NULL;
 198
 199 #ifndef __APPLE__ /* Do we need a configure check for this? */
 200 #define SUPPORT_ATIMES 1
 201 #endif
 202
 203 int quiet = 0;
 204 int output_motd = 1;
 205 int log_before_transfer = 0;
 206 int stdout_format_has_i = 0;
 207 int stdout_format_has_o_or_i = 0;
 208 int logfile_format_has_i = 0;
 209 int logfile_format_has_o_or_i = 0;
 210 int always_checksum = 0;
 211 int list_only = 0;
 212
 213 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
 214 char *batch_name = NULL;
 215
 216 int need_unsorted_flist = 0;
 217 char *iconv_opt =
 218 #ifdef ICONV_OPTION
 219                 ICONV_OPTION;
 220 #else
 221                 NULL;
 222 #endif
 223
 224 struct chmod_mode_struct *chmod_modes = NULL;
 225
 226 static const char *debug_verbosity[] = {
 227         /*0*/ NULL,
 228         /*1*/ NULL,
 229         /*2*/ "BIND,CMD,CONNECT,DEL,DELTASUM,DUP,FILTER,FLIST,ICONV",
 230         /*3*/ "ACL,BACKUP,CONNECT2,DELTASUM2,DEL2,EXIT,FILTER2,FLIST2,FUZZY,GENR,OWN,RECV,SEND,TIME",
 231         /*4*/ "CMD2,DELTASUM3,DEL3,EXIT2,FLIST3,ICONV2,OWN2,PROTO,TIME2",
 232         /*5*/ "CHDIR,DELTASUM4,FLIST4,FUZZY2,HASH,HLINK",
 233 };
 234
 235 #define MAX_VERBOSITY ((int)(sizeof debug_verbosity / sizeof debug_verbosity[0]) - 1)
 236
 237 static const char *info_verbosity[1+MAX_VERBOSITY] = {
 238         /*0*/ NULL,
 239         /*1*/ "COPY,DEL,FLIST,MISC,NAME,STATS,SYMSAFE",
 240         /*2*/ "BACKUP,MISC2,MOUNT,NAME2,REMOVE,SKIP",
 241 };
 242
 243 #define MAX_OUT_LEVEL 4 /* The largest N allowed for any flagN word. */
 244
 245 short info_levels[COUNT_INFO], debug_levels[COUNT_DEBUG];
 246
 247 #define DEFAULT_PRIORITY 0      /* Default/implied/--verbose set values. */
 248 #define HELP_PRIORITY 1         /* The help output uses this level. */
 249 #define USER_PRIORITY 2         /* User-specified via --info or --debug */
 250 #define LIMIT_PRIORITY 3        /* Overriding priority when limiting values. */
 251
 252 #define W_CLI (1<<0)    /* client side */
 253 #define W_SRV (1<<1)    /* server side */
 254 #define W_SND (1<<2)    /* sending side */
 255 #define W_REC (1<<3)    /* receiving side */
 256
 257 struct output_struct {
 258         char *name;     /* The name of the info/debug flag. */
 259         char *help;     /* The description of the info/debug flag. */
 260         uchar namelen;  /* The length of the name string. */
 261         uchar flag;     /* The flag's value, for consistency check. */
 262         uchar where;    /* Bits indicating where the flag is used. */
 263         uchar priority; /* See *_PRIORITY defines. */
 264 };
 265
 266 #define INFO_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, INFO_##flag, where, 0 }
 267
 268 static struct output_struct info_words[COUNT_INFO+1] = {
 269         INFO_WORD(BACKUP, W_REC, "Mention files backed up"),
 270         INFO_WORD(COPY, W_REC, "Mention files copied locally on the receiving side"),
 271         INFO_WORD(DEL, W_REC, "Mention deletions on the receiving side"),
 272         INFO_WORD(FLIST, W_CLI, "Mention file-list receiving/sending (levels 1-2)"),
 273         INFO_WORD(MISC, W_SND|W_REC, "Mention miscellaneous information (levels 1-2)"),
 274         INFO_WORD(MOUNT, W_SND|W_REC, "Mention mounts that were found or skipped"),
 275         INFO_WORD(NAME, W_SND|W_REC, "Mention 1) updated file/dir names, 2) unchanged names"),
 276         INFO_WORD(PROGRESS, W_CLI, "Mention 1) per-file progress or 2) total transfer progress"),
 277         INFO_WORD(REMOVE, W_SND, "Mention files removed on the sending side"),
 278         INFO_WORD(SKIP, W_REC, "Mention files that are skipped due to options used"),
 279         INFO_WORD(STATS, W_CLI|W_SRV, "Mention statistics at end of run (levels 1-3)"),
 280         INFO_WORD(SYMSAFE, W_SND|W_REC, "Mention symlinks that are unsafe"),
 281         { NULL, "--info", 0, 0, 0, 0 }
 282 };
 283
 284 #define DEBUG_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, DEBUG_##flag, where, 0 }
 285
 286 static struct output_struct debug_words[COUNT_DEBUG+1] = {
 287         DEBUG_WORD(ACL, W_SND|W_REC, "Debug extra ACL info"),
 288         DEBUG_WORD(BACKUP, W_REC, "Debug backup actions (levels 1-2)"),
 289         DEBUG_WORD(BIND, W_CLI, "Debug socket bind actions"),
 290         DEBUG_WORD(CHDIR, W_CLI|W_SRV, "Debug when the current directory changes"),
 291         DEBUG_WORD(CONNECT, W_CLI, "Debug connection events (levels 1-2)"),
 292         DEBUG_WORD(CMD, W_CLI, "Debug commands+options that are issued (levels 1-2)"),
 293         DEBUG_WORD(DEL, W_REC, "Debug delete actions (levels 1-3)"),
 294         DEBUG_WORD(DELTASUM, W_SND|W_REC, "Debug delta-transfer checksumming (levels 1-4)"),
 295         DEBUG_WORD(DUP, W_REC, "Debug weeding of duplicate names"),
 296         DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-3)"),
 297         DEBUG_WORD(FILTER, W_SND|W_REC, "Debug filter actions (levels 1-2)"),
 298         DEBUG_WORD(FLIST, W_SND|W_REC, "Debug file-list operations (levels 1-4)"),
 299         DEBUG_WORD(FUZZY, W_REC, "Debug fuzzy scoring (levels 1-2)"),
 300         DEBUG_WORD(GENR, W_REC, "Debug generator functions"),
 301         DEBUG_WORD(HASH, W_SND|W_REC, "Debug hashtable code"),
 302         DEBUG_WORD(HLINK, W_SND|W_REC, "Debug hard-link actions (levels 1-3)"),
 303         DEBUG_WORD(ICONV, W_CLI|W_SRV, "Debug iconv character conversions (levels 1-2)"),
 304         DEBUG_WORD(IO, W_CLI|W_SRV, "Debug I/O routines (levels 1-4)"),
 305         DEBUG_WORD(NSTR, W_CLI|W_SRV, "Debug negotiation strings"),
 306         DEBUG_WORD(OWN, W_REC, "Debug ownership changes in users & groups (levels 1-2)"),
 307         DEBUG_WORD(PROTO, W_CLI|W_SRV, "Debug protocol information"),
 308         DEBUG_WORD(RECV, W_REC, "Debug receiver functions"),
 309         DEBUG_WORD(SEND, W_SND, "Debug sender functions"),
 310         DEBUG_WORD(TIME, W_REC, "Debug setting of modified times (levels 1-2)"),
 311         { NULL, "--debug", 0, 0, 0, 0 }
 312 };
 313
 314 static int verbose = 0;
 315 static int do_stats = 0;
 316 static int do_progress = 0;
 317 static int daemon_opt;   /* sets am_daemon after option error-reporting */
 318 static int omit_dir_times = 0;
 319 static int omit_link_times = 0;
 320 static int F_option_cnt = 0;
 321 static int modify_window_set;
 322 static int itemize_changes = 0;
 323 static int refused_delete, refused_archive_part, refused_compress;
 324 static int refused_partial, refused_progress, refused_delete_before;
 325 static int refused_delete_during;
 326 static int refused_inplace, refused_no_iconv;
 327 static BOOL usermap_via_chown, groupmap_via_chown;
 328 static char *outbuf_mode;
 329 static char *bwlimit_arg, *max_size_arg, *min_size_arg;
 330 static char tmp_partialdir[] = ".~tmp~";
 331
 332 /** Local address to bind.  As a character string because it's
 333  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
 334  * address, or a hostname. **/
 335 char *bind_address;
 336
 337 static void output_item_help(struct output_struct *words);
 338
 339 /* This constructs a string that represents all the options set for either
 340  * the --info or --debug setting, skipping any implied options (by -v, etc.).
 341  * This is used both when conveying the user's options to the server, and
 342  * when the help output wants to tell the user what options are implied. */
 343 static char *make_output_option(struct output_struct *words, short *levels, uchar where)
 344 {
 345         char *str = words == info_words ? "--info=" : "--debug=";
 346         int j, counts[MAX_OUT_LEVEL+1], pos, skipped = 0, len = 0, max = 0, lev = 0;
 347         int word_count = words == info_words ? COUNT_INFO : COUNT_DEBUG;
 348         char *buf;
 349
 350         memset(counts, 0, sizeof counts);
 351
 352         for (j = 0; words[j].name; j++) {
 353                 if (words[j].flag != j) {
 354                         rprintf(FERROR, "rsync: internal error on %s%s: %d != %d\n",
 355                                 words == info_words ? "INFO_" : "DEBUG_",
 356                                 words[j].name, words[j].flag, j);
 357                         exit_cleanup(RERR_UNSUPPORTED);
 358                 }
 359                 if (!(words[j].where & where))
 360                         continue;
 361                 if (words[j].priority == DEFAULT_PRIORITY) {
 362                         /* Implied items don't need to be mentioned. */
 363                         skipped++;
 364                         continue;
 365                 }
 366                 len += len ? 1 : strlen(str);
 367                 len += strlen(words[j].name);
 368                 len += levels[j] == 1 ? 0 : 1;
 369
 370                 if (words[j].priority == HELP_PRIORITY)
 371                         continue; /* no abbreviating for help */
 372
 373                 assert(levels[j] <= MAX_OUT_LEVEL);
 374                 if (++counts[levels[j]] > max) {
 375                         /* Determine which level has the most items. */
 376                         lev = levels[j];
 377                         max = counts[lev];
 378                 }
 379         }
 380
 381         /* Sanity check the COUNT_* define against the length of the table. */
 382         if (j != word_count) {
 383                 rprintf(FERROR, "rsync: internal error: %s is wrong! (%d != %d)\n",
 384                         words == info_words ? "COUNT_INFO" : "COUNT_DEBUG",
 385                         j, word_count);
 386                 exit_cleanup(RERR_UNSUPPORTED);
 387         }
 388
 389         if (!len)
 390                 return NULL;
 391
 392         len++;
 393         buf = new_array(char, len);
 394         pos = 0;
 395
 396         if (skipped || max < 5)
 397                 lev = -1;
 398         else {
 399                 if (lev == 0)
 400                         pos += snprintf(buf, len, "%sNONE", str);
 401                 else if (lev == 1)
 402                         pos += snprintf(buf, len, "%sALL", str);
 403                 else
 404                         pos += snprintf(buf, len, "%sALL%d", str, lev);
 405         }
 406
 407         for (j = 0; words[j].name && pos < len; j++) {
 408                 if (words[j].priority == DEFAULT_PRIORITY || levels[j] == lev || !(words[j].where & where))
 409                         continue;
 410                 if (pos)
 411                         buf[pos++] = ',';
 412                 else
 413                         pos += strlcpy(buf+pos, str, len-pos);
 414                 if (pos < len)
 415                         pos += strlcpy(buf+pos, words[j].name, len-pos);
 416                 /* Level 1 is implied by the name alone. */
 417                 if (levels[j] != 1 && pos < len)
 418                         buf[pos++] = '0' + levels[j];
 419         }
 420
 421         buf[pos] = '\0';
 422
 423         return buf;
 424 }
 425
 426 static void parse_output_words(struct output_struct *words, short *levels, const char *str, uchar priority)
 427 {
 428         const char *s;
 429         int j, len, lev;
 430
 431         for ( ; str; str = s) {
 432                 if ((s = strchr(str, ',')) != NULL)
 433                         len = s++ - str;
 434                 else
 435                         len = strlen(str);
 436                 if (!len)
 437                         continue;
 438                 if (!isDigit(str)) {
 439                         while (len && isDigit(str+len-1))
 440                                 len--;
 441                 }
 442                 lev = isDigit(str+len) ? atoi(str+len) : 1;
 443                 if (lev > MAX_OUT_LEVEL)
 444                         lev = MAX_OUT_LEVEL;
 445                 if (len == 4 && strncasecmp(str, "help", 4) == 0) {
 446                         output_item_help(words);
 447                         exit_cleanup(0);
 448                 }
 449                 if (len == 4 && strncasecmp(str, "none", 4) == 0)
 450                         len = lev = 0;
 451                 else if (len == 3 && strncasecmp(str, "all", 3) == 0)
 452                         len = 0;
 453                 for (j = 0; words[j].name; j++) {
 454                         if (!len
 455                          || (len == words[j].namelen && strncasecmp(str, words[j].name, len) == 0)) {
 456                                 if (priority >= words[j].priority) {
 457                                         words[j].priority = priority;
 458                                         levels[j] = lev;
 459                                 }
 460                                 if (len)
 461                                         break;
 462                         }
 463                 }
 464                 if (len && !words[j].name && !am_server) {
 465                         rprintf(FERROR, "Unknown %s item: \"%.*s\"\n",
 466                                 words[j].help, len, str);
 467                         exit_cleanup(RERR_SYNTAX);
 468                 }
 469         }
 470 }
 471
 472 /* Tell the user what all the info or debug flags mean. */
 473 static void output_item_help(struct output_struct *words)
 474 {
 475         short *levels = words == info_words ? info_levels : debug_levels;
 476         const char **verbosity = words == info_words ? info_verbosity : debug_verbosity;
 477         char buf[128], *opt, *fmt = "%-10s %s\n";
 478         int j;
 479
 480         reset_output_levels();
 481
 482         rprintf(FINFO, "Use OPT or OPT1 for level 1 output, OPT2 for level 2, etc.; OPT0 silences.\n");
 483         rprintf(FINFO, "\n");
 484         for (j = 0; words[j].name; j++)
 485                 rprintf(FINFO, fmt, words[j].name, words[j].help);
 486         rprintf(FINFO, "\n");
 487
 488         snprintf(buf, sizeof buf, "Set all %s options (e.g. all%d)",
 489                  words[j].help, MAX_OUT_LEVEL);
 490         rprintf(FINFO, fmt, "ALL", buf);
 491
 492         snprintf(buf, sizeof buf, "Silence all %s options (same as all0)",
 493                  words[j].help);
 494         rprintf(FINFO, fmt, "NONE", buf);
 495
 496         rprintf(FINFO, fmt, "HELP", "Output this help message");
 497         rprintf(FINFO, "\n");
 498         rprintf(FINFO, "Options added for each increase in verbose level:\n");
 499
 500         for (j = 1; j <= MAX_VERBOSITY; j++) {
 501                 parse_output_words(words, levels, verbosity[j], HELP_PRIORITY);
 502                 opt = make_output_option(words, levels, W_CLI|W_SRV|W_SND|W_REC);
 503                 if (opt) {
 504                         rprintf(FINFO, "%d) %s\n", j, strchr(opt, '=')+1);
 505                         free(opt);
 506                 }
 507                 reset_output_levels();
 508         }
 509 }
 510
 511 /* The --verbose option now sets info+debug flags. */
 512 static void set_output_verbosity(int level, uchar priority)
 513 {
 514         int j;
 515
 516         if (level > MAX_VERBOSITY)
 517                 level = MAX_VERBOSITY;
 518
 519         for (j = 1; j <= level; j++) {
 520                 parse_output_words(info_words, info_levels, info_verbosity[j], priority);
 521                 parse_output_words(debug_words, debug_levels, debug_verbosity[j], priority);
 522         }
 523 }
 524
 525 /* Limit the info+debug flag levels given a verbose-option level limit. */
 526 void limit_output_verbosity(int level)
 527 {
 528         short info_limits[COUNT_INFO], debug_limits[COUNT_DEBUG];
 529         int j;
 530
 531         if (level > MAX_VERBOSITY)
 532                 return;
 533
 534         memset(info_limits, 0, sizeof info_limits);
 535         memset(debug_limits, 0, sizeof debug_limits);
 536
 537         /* Compute the level limits in the above arrays. */
 538         for (j = 1; j <= level; j++) {
 539                 parse_output_words(info_words, info_limits, info_verbosity[j], LIMIT_PRIORITY);
 540                 parse_output_words(debug_words, debug_limits, debug_verbosity[j], LIMIT_PRIORITY);
 541         }
 542
 543         for (j = 0; j < COUNT_INFO; j++) {
 544                 if (info_levels[j] > info_limits[j])
 545                         info_levels[j] = info_limits[j];
 546         }
 547
 548         for (j = 0; j < COUNT_DEBUG; j++) {
 549                 if (debug_levels[j] > debug_limits[j])
 550                         debug_levels[j] = debug_limits[j];
 551         }
 552 }
 553
 554 void reset_output_levels(void)
 555 {
 556         int j;
 557
 558         memset(info_levels, 0, sizeof info_levels);
 559         memset(debug_levels, 0, sizeof debug_levels);
 560
 561         for (j = 0; j < COUNT_INFO; j++)
 562                 info_words[j].priority = DEFAULT_PRIORITY;
 563
 564         for (j = 0; j < COUNT_DEBUG; j++)
 565                 debug_words[j].priority = DEFAULT_PRIORITY;
 566 }
 567
 568 void negate_output_levels(void)
 569 {
 570         int j;
 571
 572         for (j = 0; j < COUNT_INFO; j++)
 573                 info_levels[j] *= -1;
 574
 575         for (j = 0; j < COUNT_DEBUG; j++)
 576                 debug_levels[j] *= -1;
 577 }
 578
 579 static char *istring(const char *fmt, int val)
 580 {
 581         char *str;
 582         if (asprintf(&str, fmt, val) < 0)
 583                 out_of_memory("istring");
 584         return str;
 585 }
 586
 587 static void print_info_flags(enum logcode f)
 588 {
 589         STRUCT_STAT *dumstat;
 590         char line_buf[75];
 591         int line_len, j;
 592         char *info_flags[] = {
 593
 594         "*Capabilities",
 595
 596                 istring("%d-bit files", (int)(sizeof (OFF_T) * 8)),
 597                 istring("%d-bit inums", (int)(sizeof dumstat->st_ino * 8)), /* Don't check ino_t! */
 598                 istring("%d-bit timestamps", (int)(sizeof (time_t) * 8)),
 599                 istring("%d-bit long ints", (int)(sizeof (int64) * 8)),
 600
 601 #ifndef HAVE_SOCKETPAIR
 602                 "no "
 603 #endif
 604                         "socketpairs",
 605
 606 #ifndef SUPPORT_HARD_LINKS
 607                 "no "
 608 #endif
 609                         "hardlinks",
 610
 611 #ifndef SUPPORT_LINKS
 612                 "no "
 613 #endif
 614                         "symlinks",
 615
 616 #ifndef INET6
 617                 "no "
 618 #endif
 619                         "IPv6",
 620
 621 #ifndef SUPPORT_ATIMES
 622                 "no "
 623 #endif
 624                         "atimes",
 625
 626                 "batchfiles",
 627
 628 #ifndef HAVE_FTRUNCATE
 629                 "no "
 630 #endif
 631                         "inplace",
 632
 633 #ifndef HAVE_FTRUNCATE
 634                 "no "
 635 #endif
 636                         "append",
 637
 638 #ifndef SUPPORT_ACLS
 639                 "no "
 640 #endif
 641                         "ACLs",
 642
 643 #ifndef SUPPORT_XATTRS
 644                 "no "
 645 #endif
 646                         "xattrs",
 647
 648 #ifdef RSYNC_USE_PROTECTED_ARGS
 649                 "default "
 650 #else
 651                 "optional "
 652 #endif
 653                         "protect-args",
 654
 655 #ifndef ICONV_OPTION
 656                 "no "
 657 #endif
 658                         "iconv",
 659
 660 #ifndef CAN_SET_SYMLINK_TIMES
 661                 "no "
 662 #endif
 663                         "symtimes",
 664
 665 #ifndef SUPPORT_PREALLOCATION
 666                 "no "
 667 #endif
 668                         "prealloc",
 669
 670 #ifndef HAVE_MKTIME
 671                 "no "
 672 #endif
 673                         "stop-at",
 674
 675 #ifndef SUPPORT_CRTIMES
 676                 "no "
 677 #endif
 678                         "crtimes",
 679
 680         "*Optimizations",
 681
 682 #ifndef HAVE_SIMD
 683                 "no "
 684 #endif
 685                         "SIMD",
 686
 687 #ifndef HAVE_ASM
 688                 "no "
 689 #endif
 690                         "asm",
 691
 692 #ifndef USE_OPENSSL
 693                 "no "
 694 #endif
 695                         "openssl-crypto",
 696
 697                 NULL
 698         };
 699
 700         for (line_len = 0, j = 0; ; j++) {
 701                 char *str = info_flags[j], *next_nfo = str ? info_flags[j+1] : NULL;
 702                 int str_len = str && *str != '*' ? strlen(str) : 1000;
 703                 int need_comma = next_nfo && *next_nfo != '*' ? 1 : 0;
 704                 if (line_len && line_len + 1 + str_len + need_comma >= (int)sizeof line_buf) {
 705                         rprintf(f, "   %s\n", line_buf);
 706                         line_len = 0;
 707                 }
 708                 if (!str)
 709                         break;
 710                 if (*str == '*') {
 711                         rprintf(f, "%s:\n", str+1);
 712                         continue;
 713                 }
 714                 line_len += snprintf(line_buf+line_len, sizeof line_buf - line_len, " %s%s", str, need_comma ? "," : "");
 715         }
 716 }
 717
 718 static void print_rsync_version(enum logcode f)
 719 {
 720         char tmpbuf[256], *subprotocol = "";
 721
 722 #if SUBPROTOCOL_VERSION != 0
 723         subprotocol = istring(".PR%d", SUBPROTOCOL_VERSION);
 724 #endif
 725         rprintf(f, "%s  version %s  protocol version %d%s\n",
 726                 RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION, subprotocol);
 727
 728         rprintf(f, "Copyright (C) 1996-" LATEST_YEAR " by Andrew Tridgell, Wayne Davison, and others.\n");
 729         rprintf(f, "Web site: https://rsync.samba.org/\n");
 730
 731         print_info_flags(f);
 732
 733         rprintf(f, "Checksum list:\n");
 734         get_default_nno_list(&valid_checksums, tmpbuf, sizeof tmpbuf, '(');
 735         rprintf(f, "    %s\n", tmpbuf);
 736
 737         rprintf(f, "Compress list:\n");
 738         get_default_nno_list(&valid_compressions, tmpbuf, sizeof tmpbuf, '(');
 739         rprintf(f, "    %s\n", tmpbuf);
 740
 741 #ifdef MAINTAINER_MODE
 742         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
 743 #endif
 744
 745 #if SIZEOF_INT64 < 8
 746         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
 747 #endif
 748         if (sizeof (int64) != SIZEOF_INT64) {
 749                 rprintf(f,
 750                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
 751                         (int) SIZEOF_INT64, (int) sizeof (int64));
 752         }
 753
 754         rprintf(f,"\n");
 755         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
 756         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
 757         rprintf(f,"General Public Licence for details.\n");
 758 }
 759
 760
 761 void usage(enum logcode F)
 762 {
 763   print_rsync_version(F);
 764
 765   rprintf(F,"\n");
 766   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
 767   rprintf(F,"via a fast differencing algorithm.\n");
 768
 769   rprintf(F,"\n");
 770   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
 771   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
 772   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
 773   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
 774   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
 775   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
 776   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
 777   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
 778   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
 779   rprintf(F,"\n");
 780   rprintf(F,"Options\n");
 781 #include "help-rsync.h"
 782   rprintf(F,"\n");
 783   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
 784   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
 785   rprintf(F,"See https://rsync.samba.org/ for updates, bug reports, and answers\n");
 786 }
 787
 788 enum {OPT_SERVER = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
 789       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
 790       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
 791       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
 792       OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, OPT_INFO, OPT_DEBUG, OPT_BLOCK_SIZE,
 793       OPT_USERMAP, OPT_GROUPMAP, OPT_CHOWN, OPT_BWLIMIT,
 794       OPT_OLD_COMPRESS, OPT_NEW_COMPRESS, OPT_NO_COMPRESS,
 795       OPT_STOP_AFTER, OPT_STOP_AT,
 796       OPT_REFUSED_BASE = 9000};
 797
 798 static struct poptOption long_options[] = {
 799   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 800   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
 801   {"version",         'V', POPT_ARG_NONE,   0, 'V', 0, 0},
 802   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
 803   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 804   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 805   {"info",             0,  POPT_ARG_STRING, 0, OPT_INFO, 0, 0 },
 806   {"debug",            0,  POPT_ARG_STRING, 0, OPT_DEBUG, 0, 0 },
 807   {"msgs2stderr",      0,  POPT_ARG_VAL,    &msgs2stderr, 1, 0, 0 },
 808   {"no-msgs2stderr",   0,  POPT_ARG_VAL,    &msgs2stderr, 0, 0, 0 },
 809   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
 810   {"motd",             0,  POPT_ARG_VAL,    &output_motd, 1, 0, 0 },
 811   {"no-motd",          0,  POPT_ARG_VAL,    &output_motd, 0, 0, 0 },
 812   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
 813   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
 814   {"no-human-readable",0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 815   {"no-h",             0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 816   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
 817   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
 818   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
 819   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 820   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 821   {"inc-recursive",    0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 822   {"no-inc-recursive", 0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 823   {"i-r",              0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 824   {"no-i-r",           0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 825   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
 826   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 827   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 828   {"old-dirs",         0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 829   {"old-d",            0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 830   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
 831   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 832   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 833   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
 834   {"acls",            'A', POPT_ARG_NONE,   0, 'A', 0, 0 },
 835   {"no-acls",          0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 836   {"no-A",             0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 837   {"xattrs",          'X', POPT_ARG_NONE,   0, 'X', 0, 0 },
 838   {"no-xattrs",        0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 839   {"no-X",             0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 840   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
 841   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 842   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 843   {"atimes",          'U', POPT_ARG_NONE,   0, 'U', 0, 0 },
 844   {"no-atimes",        0,  POPT_ARG_VAL,    &preserve_atimes, 0, 0, 0 },
 845   {"no-U",             0,  POPT_ARG_VAL,    &preserve_atimes, 0, 0, 0 },
 846   {"open-noatime",     0,  POPT_ARG_VAL,    &open_noatime, 1, 0, 0 },
 847   {"no-open-noatime",  0,  POPT_ARG_VAL,    &open_noatime, 0, 0, 0 },
 848   {"crtimes",         'N', POPT_ARG_VAL,    &preserve_crtimes, 1, 0, 0 },
 849   {"no-crtimes",       0,  POPT_ARG_VAL,    &preserve_crtimes, 0, 0, 0 },
 850   {"no-N",             0,  POPT_ARG_VAL,    &preserve_crtimes, 0, 0, 0 },
 851   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 1, 0, 0 },
 852   {"no-omit-dir-times",0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 853   {"no-O",             0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 854   {"omit-link-times", 'J', POPT_ARG_VAL,    &omit_link_times, 1, 0, 0 },
 855   {"no-omit-link-times",0, POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 856   {"no-J",             0,  POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 857   {"modify-window",   '@', POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
 858   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
 859   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
 860   {"fake-super",       0,  POPT_ARG_VAL,    &am_root, -1, 0, 0 },
 861   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
 862   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 863   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 864   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
 865   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 866   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 867   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
 868   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
 869   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
 870   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
 871   {"write-devices",    0,  POPT_ARG_VAL,    &write_devices, 1, 0, 0 },
 872   {"no-write-devices", 0,  POPT_ARG_VAL,    &write_devices, 0, 0, 0 },
 873   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
 874   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
 875   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
 876   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 877   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 878   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
 879   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
 880   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
 881   {"munge-links",      0,  POPT_ARG_VAL,    &munge_symlinks, 1, 0, 0 },
 882   {"no-munge-links",   0,  POPT_ARG_VAL,    &munge_symlinks, 0, 0, 0 },
 883   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
 884   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
 885   {"hard-links",      'H', POPT_ARG_NONE,   0, 'H', 0, 0 },
 886   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 887   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 888   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
 889   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 890   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 891   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 892   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 893   {"i-d",              0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 894   {"no-i-d",           0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 895   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
 896   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
 897   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
 898   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
 899   {"no-one-file-system",0, POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 900   {"no-x",             0,  POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 901   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
 902   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 903   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 904   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
 905   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
 906   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
 907   {"max-alloc",        0,  POPT_ARG_STRING, &max_alloc_arg, 0, 0, 0 },
 908   {"sparse",          'S', POPT_ARG_VAL,    &sparse_files, 1, 0, 0 },
 909   {"no-sparse",        0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 910   {"no-S",             0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 911   {"preallocate",      0,  POPT_ARG_NONE,   &preallocate_files, 0, 0, 0},
 912   {"inplace",          0,  POPT_ARG_VAL,    &inplace, 1, 0, 0 },
 913   {"no-inplace",       0,  POPT_ARG_VAL,    &inplace, 0, 0, 0 },
 914   {"append",           0,  POPT_ARG_NONE,   0, OPT_APPEND, 0, 0 },
 915   {"append-verify",    0,  POPT_ARG_VAL,    &append_mode, 2, 0, 0 },
 916   {"no-append",        0,  POPT_ARG_VAL,    &append_mode, 0, 0, 0 },
 917   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
 918   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
 919   {"delete-before",    0,  POPT_ARG_NONE,   &delete_before, 0, 0, 0 },
 920   {"delete-during",    0,  POPT_ARG_VAL,    &delete_during, 1, 0, 0 },
 921   {"delete-delay",     0,  POPT_ARG_VAL,    &delete_during, 2, 0, 0 },
 922   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
 923   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
 924   {"delete-missing-args",0,POPT_BIT_SET,    &missing_args, 2, 0, 0 },
 925   {"ignore-missing-args",0,POPT_BIT_SET,    &missing_args, 1, 0, 0 },
 926   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_source_files, 2, 0, 0 }, /* deprecated */
 927   {"remove-source-files",0,POPT_ARG_VAL,    &remove_source_files, 1, 0, 0 },
 928   {"force",            0,  POPT_ARG_VAL,    &force_delete, 1, 0, 0 },
 929   {"no-force",         0,  POPT_ARG_VAL,    &force_delete, 0, 0, 0 },
 930   {"ignore-errors",    0,  POPT_ARG_VAL,    &ignore_errors, 1, 0, 0 },
 931   {"no-ignore-errors", 0,  POPT_ARG_VAL,    &ignore_errors, 0, 0, 0 },
 932   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
 933   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
 934   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
 935   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
 936   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
 937   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
 938   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
 939   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
 940   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
 941   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 942   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 943   {"checksum",        'c', POPT_ARG_VAL,    &always_checksum, 1, 0, 0 },
 944   {"no-checksum",      0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 945   {"no-c",             0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 946   {"checksum-choice",  0,  POPT_ARG_STRING, &checksum_choice, 0, 0, 0 },
 947   {"cc",               0,  POPT_ARG_STRING, &checksum_choice, 0, 0, 0 },
 948   {"block-size",      'B', POPT_ARG_STRING, 0, OPT_BLOCK_SIZE, 0, 0 },
 949   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
 950   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
 951   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
 952   {"fuzzy",           'y', POPT_ARG_NONE,   0, 'y', 0, 0 },
 953   {"no-fuzzy",         0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 954   {"no-y",             0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 955   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
 956   {"old-compress",     0,  POPT_ARG_NONE,   0, OPT_OLD_COMPRESS, 0, 0 },
 957   {"new-compress",     0,  POPT_ARG_NONE,   0, OPT_NEW_COMPRESS, 0, 0 },
 958   {"no-compress",      0,  POPT_ARG_NONE,   0, OPT_NO_COMPRESS, 0, 0 },
 959   {"no-z",             0,  POPT_ARG_NONE,   0, OPT_NO_COMPRESS, 0, 0 },
 960   {"compress-choice",  0,  POPT_ARG_STRING, &compress_choice, 0, 0, 0 },
 961   {"zc",               0,  POPT_ARG_STRING, &compress_choice, 0, 0, 0 },
 962   {"skip-compress",    0,  POPT_ARG_STRING, &skip_compress, 0, 0, 0 },
 963   {"compress-level",   0,  POPT_ARG_INT,    &do_compression_level, 0, 0, 0 },
 964   {"zl",               0,  POPT_ARG_INT,    &do_compression_level, 0, 0, 0 },
 965   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
 966   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
 967   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
 968   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
 969   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
 970   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
 971   {"delay-updates",    0,  POPT_ARG_VAL,    &delay_updates, 1, 0, 0 },
 972   {"no-delay-updates", 0,  POPT_ARG_VAL,    &delay_updates, 0, 0, 0 },
 973   {"prune-empty-dirs",'m', POPT_ARG_VAL,    &prune_empty_dirs, 1, 0, 0 },
 974   {"no-prune-empty-dirs",0,POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
 975   {"no-m",             0,  POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
 976   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
 977   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
 978   {"out-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 },
 979   {"log-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 }, /* DEPRECATED */
 980   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
 981   {"no-itemize-changes",0, POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
 982   {"no-i",             0,  POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
 983   {"bwlimit",          0,  POPT_ARG_STRING, &bwlimit_arg, OPT_BWLIMIT, 0, 0 },
 984   {"no-bwlimit",       0,  POPT_ARG_VAL,    &bwlimit, 0, 0, 0 },
 985   {"backup",          'b', POPT_ARG_VAL,    &make_backups, 1, 0, 0 },
 986   {"no-backup",        0,  POPT_ARG_VAL,    &make_backups, 0, 0, 0 },
 987   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
 988   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
 989   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
 990   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
 991   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
 992   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
 993   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
 994   {"from0",           '0', POPT_ARG_VAL,    &eol_nulls, 1, 0, 0},
 995   {"no-from0",         0,  POPT_ARG_VAL,    &eol_nulls, 0, 0, 0},
 996   {"protect-args",    's', POPT_ARG_VAL,    &protect_args, 1, 0, 0},
 997   {"no-protect-args",  0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
 998   {"no-s",             0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
 999   {"numeric-ids",      0,  POPT_ARG_VAL,    &numeric_ids, 1, 0, 0 },
1000   {"no-numeric-ids",   0,  POPT_ARG_VAL,    &numeric_ids, 0, 0, 0 },
1001   {"usermap",          0,  POPT_ARG_STRING, 0, OPT_USERMAP, 0, 0 },
1002   {"groupmap",         0,  POPT_ARG_STRING, 0, OPT_GROUPMAP, 0, 0 },
1003   {"chown",            0,  POPT_ARG_STRING, 0, OPT_CHOWN, 0, 0 },
1004   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
1005   {"no-timeout",       0,  POPT_ARG_VAL,    &io_timeout, 0, 0, 0 },
1006   {"contimeout",       0,  POPT_ARG_INT,    &connect_timeout, 0, 0, 0 },
1007   {"no-contimeout",    0,  POPT_ARG_VAL,    &connect_timeout, 0, 0, 0 },
1008   {"stop-after",       0,  POPT_ARG_STRING, 0, OPT_STOP_AFTER, 0, 0 },
1009   {"time-limit",       0,  POPT_ARG_STRING, 0, OPT_STOP_AFTER, 0, 0 }, /* earlier stop-after name */
1010   {"stop-at",          0,  POPT_ARG_STRING, 0, OPT_STOP_AT, 0, 0 },
1011   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
1012   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
1013   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1014   {"iconv",            0,  POPT_ARG_STRING, &iconv_opt, 0, 0, 0 },
1015   {"no-iconv",         0,  POPT_ARG_NONE,   0, OPT_NO_ICONV, 0, 0 },
1016   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1017   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1018   {"8-bit-output",    '8', POPT_ARG_VAL,    &allow_8bit_chars, 1, 0, 0 },
1019   {"no-8-bit-output",  0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1020   {"no-8",             0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1021   {"mkpath",           0,  POPT_ARG_VAL,    &mkpath_dest_arg, 1, 0, 0 },
1022   {"no-mkpath",        0,  POPT_ARG_VAL,    &mkpath_dest_arg, 0, 0, 0 },
1023   {"qsort",            0,  POPT_ARG_NONE,   &use_qsort, 0, 0, 0 },
1024   {"copy-as",          0,  POPT_ARG_STRING, &copy_as, 0, 0, 0 },
1025   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1026   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1027   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1028   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
1029   {"early-input",      0,  POPT_ARG_STRING, &early_input_file, 0, 0, 0 },
1030   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
1031   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
1032   {"outbuf",           0,  POPT_ARG_STRING, &outbuf_mode, 0, 0, 0 },
1033   {"remote-option",   'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1034   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1035   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
1036   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
1037   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
1038   /* All the following options switch us into daemon-mode option-parsing. */
1039   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1040   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1041   {"dparam",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1042   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1043   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1044   {0,0,0,0, 0, 0, 0}
1045 };
1046
1047 static void daemon_usage(enum logcode F)
1048 {
1049   print_rsync_version(F);
1050
1051   rprintf(F,"\n");
1052   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
1053 #include "help-rsyncd.h"
1054   rprintf(F,"\n");
1055   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
1056   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
1057 }
1058
1059 static struct poptOption long_daemon_options[] = {
1060   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
1061   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1062   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
1063   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
1064   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
1065   {"dparam",          'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1066   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1067   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1068   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
1069   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
1070   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
1071   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
1072   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1073   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1074   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1075   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
1076   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1077   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
1078   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1079   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1080   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
1081   {0,0,0,0, 0, 0, 0}
1082 };
1083
1084
1085 static char err_buf[200];
1086
1087
1088 /**
1089  * Store the option error message, if any, so that we can log the
1090  * connection attempt (which requires parsing the options), and then
1091  * show the error later on.
1092  **/
1093 void option_error(void)
1094 {
1095         if (!err_buf[0]) {
1096                 strlcpy(err_buf, "Error parsing options: option may "
1097                         "be supported on client but not on server?\n",
1098                         sizeof err_buf);
1099         }
1100
1101         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
1102         io_flush(MSG_FLUSH);
1103         msleep(20);
1104 }
1105
1106
1107 static void parse_one_refuse_match(int negated, const char *ref, const struct poptOption *list_end)
1108 {
1109         struct poptOption *op;
1110         char shortName[2];
1111         int is_wild = strpbrk(ref, "*?[") != NULL;
1112         int found_match = 0;
1113
1114         shortName[1] = '\0';
1115
1116         if (strcmp("a", ref) == 0 || strcmp("archive", ref) == 0) {
1117                 ref = "[ardlptgoD]";
1118                 is_wild = 1;
1119         }
1120
1121         for (op = long_options; op != list_end; op++) {
1122                 *shortName = op->shortName;
1123                 if ((op->longName && wildmatch(ref, op->longName))
1124                  || (*shortName && wildmatch(ref, shortName))) {
1125                         if (op->descrip[1] == '*')
1126                                 op->descrip = negated ? "a*" : "r*";
1127                         else if (!is_wild)
1128                                 op->descrip = negated ? "a=" : "r=";
1129                         found_match = 1;
1130                         if (!is_wild)
1131                                 break;
1132                 }
1133         }
1134
1135         if (!found_match)
1136                 rprintf(FLOG, "No match for refuse-options string \"%s\"\n", ref);
1137 }
1138
1139
1140 /**
1141  * Tweak the option table to disable all options that the rsyncd.conf
1142  * file has told us to refuse.
1143  **/
1144 static void set_refuse_options(void)
1145 {
1146         struct poptOption *op, *list_end = NULL;
1147         char *cp, *ref = lp_refuse_options(module_id);
1148         int negated;
1149
1150         if (!ref)
1151                 ref = "";
1152
1153         if (!am_daemon)
1154                 ref = "";
1155
1156         /* We abuse the descrip field in poptOption to make it easy to flag which options
1157          * are refused (since we don't use it otherwise).  Start by marking all options
1158          * as "a"ccepted with a few options also marked as non-wild. */
1159         for (op = long_options; ; op++) {
1160                 const char *longName = op->longName ? op->longName : "";
1161                 if (!op->longName && !op->shortName) {
1162                         list_end = op;
1163                         break;
1164                 }
1165                 if (!am_daemon
1166                  || op->shortName == 'e' /* Required for compatibility flags */
1167                  || op->shortName == '0' /* --from0 just modifies --files-from, so refuse that instead (or not) */
1168                  || op->shortName == 's' /* --protect-args is always OK */
1169                  || op->shortName == 'n' /* --dry-run is always OK */
1170                  || strcmp("iconv", longName) == 0
1171                  || strcmp("no-iconv", longName) == 0
1172                  || strcmp("checksum-seed", longName) == 0
1173                  || strcmp("write-devices", longName) == 0 /* disable wild-match (it gets refused below) */
1174                  || strcmp("log-format", longName) == 0 /* aka out-format (NOT log-file-format) */
1175                  || strcmp("sender", longName) == 0
1176                  || strcmp("server", longName) == 0)
1177                         op->descrip = "a="; /* exact-match only */
1178                 else
1179                         op->descrip = "a*"; /* wild-card-able */
1180         }
1181         assert(list_end != NULL);
1182
1183         if (am_daemon) { /* Refused by default, but can be accepted via a negated exact match. */
1184                 parse_one_refuse_match(0, "write-devices", list_end);
1185         }
1186
1187         while (1) {
1188                 while (*ref == ' ') ref++;
1189                 if (!*ref)
1190                         break;
1191                 if ((cp = strchr(ref, ' ')) != NULL)
1192                         *cp = '\0';
1193                 negated = *ref == '!';
1194                 if (negated && ref[1])
1195                         ref++;
1196                 parse_one_refuse_match(negated, ref, list_end);
1197                 if (!cp)
1198                         break;
1199                 *cp = ' ';
1200                 ref = cp + 1;
1201         }
1202
1203         if (am_daemon) {
1204 #ifdef ICONV_OPTION
1205                 if (!*lp_charset(module_id))
1206                         parse_one_refuse_match(0, "iconv", list_end);
1207 #endif
1208                 parse_one_refuse_match(0, "log-file*", list_end);
1209         }
1210
1211 #ifndef SUPPORT_ATIMES
1212         parse_one_refuse_match(0, "atimes", list_end);
1213 #endif
1214 #ifndef SUPPORT_HARD_LINKS
1215         parse_one_refuse_match(0, "link-dest", list_end);
1216 #endif
1217 #ifndef HAVE_MKTIME
1218         parse_one_refuse_match(0, "stop-at", list_end);
1219 #endif
1220 #ifndef ICONV_OPTION
1221         parse_one_refuse_match(0, "iconv", list_end);
1222 #endif
1223 #ifndef HAVE_SETVBUF
1224         parse_one_refuse_match(0, "outbuf", list_end);
1225 #endif
1226 #ifndef SUPPORT_CRTIMES
1227         parse_one_refuse_match(0, "crtimes", list_end);
1228 #endif
1229
1230         /* Now we use the descrip values to actually mark the options for refusal. */
1231         for (op = long_options; op != list_end; op++) {
1232                 int refused = op->descrip[0] == 'r';
1233                 op->descrip = NULL;
1234                 if (!refused)
1235                         continue;
1236                 if (op->argInfo == POPT_ARG_VAL)
1237                         op->argInfo = POPT_ARG_NONE;
1238                 op->val = (op - long_options) + OPT_REFUSED_BASE;
1239                 /* The following flags are set to let us easily check an implied option later in the code. */
1240                 switch (op->shortName) {
1241                 case 'r': case 'd': case 'l': case 'p':
1242                 case 't': case 'g': case 'o': case 'D':
1243                         refused_archive_part = op->val;
1244                         break;
1245                 case 'z':
1246                         refused_compress = op->val;
1247                         break;
1248                 case '\0':
1249                         if (strcmp("delete", op->longName) == 0)
1250                                 refused_delete = op->val;
1251                         else if (strcmp("delete-before", op->longName) == 0)
1252                                 refused_delete_before = op->val;
1253                         else if (strcmp("delete-during", op->longName) == 0)
1254                                 refused_delete_during = op->val;
1255                         else if (strcmp("partial", op->longName) == 0)
1256                                 refused_partial = op->val;
1257                         else if (strcmp("progress", op->longName) == 0)
1258                                 refused_progress = op->val;
1259                         else if (strcmp("inplace", op->longName) == 0)
1260                                 refused_inplace = op->val;
1261                         else if (strcmp("no-iconv", op->longName) == 0)
1262                                 refused_no_iconv = op->val;
1263                         break;
1264                 }
1265         }
1266 }
1267
1268
1269 static int count_args(const char **argv)
1270 {
1271         int i = 0;
1272
1273         if (argv) {
1274                 while (argv[i] != NULL)
1275                         i++;
1276         }
1277
1278         return i;
1279 }
1280
1281 /* If the size_arg is an invalid string or the value is < min_value, an error
1282  * is put into err_buf & the return is -1.  Note that this parser does NOT
1283  * support negative numbers, so a min_value < 0 doesn't make any sense. */
1284 static ssize_t parse_size_arg(const char *size_arg, char def_suf, const char *opt_name,
1285                               ssize_t min_value, ssize_t max_value, BOOL unlimited_0)
1286 {
1287         int reps, mult, len;
1288         const char *arg, *err = "invalid", *min_max = NULL;
1289         ssize_t limit = -1, size = 1;
1290
1291         for (arg = size_arg; isDigit(arg); arg++) {}
1292         if (*arg == '.' || *arg == get_decimal_point()) /* backward compatibility: always allow '.' */
1293                 for (arg++; isDigit(arg); arg++) {}
1294         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
1295         case 'b': case 'B':
1296                 reps = 0;
1297                 break;
1298         case 'k': case 'K':
1299                 reps = 1;
1300                 break;
1301         case 'm': case 'M':
1302                 reps = 2;
1303                 break;
1304         case 'g': case 'G':
1305                 reps = 3;
1306                 break;
1307         case 't': case 'T':
1308                 reps = 4;
1309                 break;
1310         case 'p': case 'P':
1311                 reps = 5;
1312                 break;
1313         default:
1314                 goto failure;
1315         }
1316         if (*arg == 'b' || *arg == 'B')
1317                 mult = 1000, arg++;
1318         else if (!*arg || *arg == '+' || *arg == '-')
1319                 mult = 1024;
1320         else if (strncasecmp(arg, "ib", 2) == 0)
1321                 mult = 1024, arg += 2;
1322         else
1323                 goto failure;
1324         while (reps--)
1325                 size *= mult;
1326         size *= atof(size_arg);
1327         if ((*arg == '+' || *arg == '-') && arg[1] == '1' && arg != size_arg)
1328                 size += atoi(arg), arg += 2;
1329         if (*arg)
1330                 goto failure;
1331         if (size < 0 || (max_value >= 0 && size > max_value)) {
1332                 err = "too large";
1333                 min_max = "max";
1334                 limit = max_value;
1335                 goto failure;
1336         }
1337         if (size < min_value && (!unlimited_0 || size != 0)) {
1338                 err = "too small";
1339                 min_max = "min";
1340                 limit = min_value;
1341                 goto failure;
1342         }
1343         return size;
1344
1345 failure:
1346         len = snprintf(err_buf, sizeof err_buf - 1, "--%s=%s is %s", opt_name, size_arg, err);
1347         if (min_max && limit >= 0 && len < (int)sizeof err_buf - 10) {
1348                 len += snprintf(err_buf + len, sizeof err_buf - len - 1, " (%s: %s%s)",
1349                         min_max, do_big_num(limit, 3, NULL),
1350                         unlimited_0 && min_max[1] == 'i' ? " or 0 for unlimited" : "");
1351         }
1352         err_buf[len] = '\n';
1353         err_buf[len+1] = '\0';
1354         return -1;
1355 }
1356
1357 #ifdef HAVE_MKTIME
1358 /* Allow the user to specify a time in the format yyyy-mm-ddThh:mm while
1359  * also allowing abbreviated data.  For instance, if the time is omitted,
1360  * it defaults to midnight.  If the date is omitted, it defaults to the
1361  * next possible date in the future with the specified time.  Even the
1362  * year or year-month can be omitted, again defaulting to the next date
1363  * in the future that matches the specified information.  A 2-digit year
1364  * is also OK, as is using '/' instead of '-'. */
1365 static time_t parse_time(const char *arg)
1366 {
1367         const char *cp;
1368         time_t val, now = time(NULL);
1369         struct tm t, *today = localtime(&now);
1370         int in_date, old_mday, n;
1371
1372         memset(&t, 0, sizeof t);
1373         t.tm_year = t.tm_mon = t.tm_mday = -1;
1374         t.tm_hour = t.tm_min = t.tm_isdst = -1;
1375         cp = arg;
1376         if (*cp == 'T' || *cp == 't' || *cp == ':') {
1377                 in_date = *cp == ':' ? 0 : -1;
1378                 cp++;
1379         } else
1380                 in_date = 1;
1381         for ( ; ; cp++) {
1382                 if (!isDigit(cp))
1383                         return (time_t)-1;
1384                 n = 0;
1385                 do {
1386                         n = n * 10 + *cp++ - '0';
1387                 } while (isDigit(cp));
1388                 if (*cp == ':')
1389                         in_date = 0;
1390                 if (in_date > 0) {
1391                         if (t.tm_year != -1)
1392                                 return (time_t)-1;
1393                         t.tm_year = t.tm_mon;
1394                         t.tm_mon = t.tm_mday;
1395                         t.tm_mday = n;
1396                         if (!*cp)
1397                                 break;
1398                         if (*cp == 'T' || *cp == 't') {
1399                                 if (!cp[1])
1400                                         break;
1401                                 in_date = -1;
1402                         } else if (*cp != '-' && *cp != '/')
1403                                 return (time_t)-1;
1404                         continue;
1405                 }
1406                 if (t.tm_hour != -1)
1407                         return (time_t)-1;
1408                 t.tm_hour = t.tm_min;
1409                 t.tm_min = n;
1410                 if (!*cp) {
1411                         if (in_date < 0)
1412                                 return (time_t)-1;
1413                         break;
1414                 }
1415                 if (*cp != ':')
1416                         return (time_t)-1;
1417                 in_date = 0;
1418         }
1419
1420         in_date = 0;
1421         if (t.tm_year < 0) {
1422                 t.tm_year = today->tm_year;
1423                 in_date = 1;
1424         } else if (t.tm_year < 100) {
1425                 while (t.tm_year < today->tm_year)
1426                         t.tm_year += 100;
1427         } else
1428                 t.tm_year -= 1900;
1429         if (t.tm_mon < 0) {
1430                 t.tm_mon = today->tm_mon;
1431                 in_date = 2;
1432         } else
1433                 t.tm_mon--;
1434         if (t.tm_mday < 0) {
1435                 t.tm_mday = today->tm_mday;
1436                 in_date = 3;
1437         }
1438
1439         n = 0;
1440         if (t.tm_min < 0) {
1441                 t.tm_hour = t.tm_min = 0;
1442         } else if (t.tm_hour < 0) {
1443                 if (in_date != 3)
1444                         return (time_t)-1;
1445                 in_date = 0;
1446                 t.tm_hour = today->tm_hour;
1447                 n = 60*60;
1448         }
1449
1450         /* Note that mktime() might change a too-large tm_mday into the start of
1451          * the following month which we need to undo in the following code! */
1452         old_mday = t.tm_mday;
1453         if (t.tm_hour > 23 || t.tm_min > 59
1454             || t.tm_mon < 0 || t.tm_mon >= 12
1455             || t.tm_mday < 1 || t.tm_mday > 31
1456             || (val = mktime(&t)) == (time_t)-1)
1457                 return (time_t)-1;
1458
1459         while (in_date && (val <= now || t.tm_mday < old_mday)) {
1460                 switch (in_date) {
1461                 case 3:
1462                         old_mday = ++t.tm_mday;
1463                         break;
1464                 case 2:
1465                         if (t.tm_mday < old_mday)
1466                                 t.tm_mday = old_mday; /* The month already got bumped forward */
1467                         else if (++t.tm_mon == 12) {
1468                                 t.tm_mon = 0;
1469                                 t.tm_year++;
1470                         }
1471                         break;
1472                 case 1:
1473                         if (t.tm_mday < old_mday) {
1474                                 /* mon==1 mday==29 got bumped to mon==2 */
1475                                 if (t.tm_mon != 2 || old_mday != 29)
1476                                         return (time_t)-1;
1477                                 t.tm_mon = 1;
1478                                 t.tm_mday = 29;
1479                         }
1480                         t.tm_year++;
1481                         break;
1482                 }
1483                 if ((val = mktime(&t)) == (time_t)-1) {
1484                         /* This code shouldn't be needed, as mktime() should auto-round to the next month. */
1485                         if (in_date != 3 || t.tm_mday <= 28)
1486                                 return (time_t)-1;
1487                         t.tm_mday = old_mday = 1;
1488                         in_date = 2;
1489                 }
1490         }
1491         if (n) {
1492                 while (val <= now)
1493                         val += n;
1494         }
1495         return val;
1496 }
1497 #endif
1498
1499 static void create_refuse_error(int which)
1500 {
1501         const char *msg;
1502         if (am_daemon)
1503                 msg = "The server is configured to refuse";
1504         else if (am_server)
1505                 msg = "The server does not support";
1506         else
1507                 msg = "This rsync does not support";
1508
1509         /* The "which" value is the index + OPT_REFUSED_BASE. */
1510         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
1511         int n = snprintf(err_buf, sizeof err_buf, "%s --%s\n", msg, op->longName) - 1;
1512         if (op->shortName)
1513                 snprintf(err_buf + n, sizeof err_buf - n, " (-%c)\n", op->shortName);
1514 }
1515
1516 /* This is used to make sure that --daemon & --server cannot be aliased to
1517  * something else. These options have always disabled popt aliases for the
1518  * parsing of a daemon or server command-line, but we have to make sure that
1519  * these options cannot vanish so that the alias disabling can take effect. */
1520 static void popt_unalias(poptContext con, const char *opt)
1521 {
1522         struct poptAlias unalias;
1523
1524         memset(&unalias, 0, sizeof unalias);
1525
1526         unalias.longName = opt + 2; /* point past the leading "--" */
1527         unalias.argc = 1;
1528         unalias.argv = new_array0(const char*, 2);
1529         unalias.argv[0] = strdup(opt);
1530
1531         poptAddAlias(con, unalias, 0);
1532 }
1533
1534 char *alt_dest_opt(int type)
1535 {
1536         if (!type)
1537                 type = alt_dest_type;
1538
1539         switch (type) {
1540         case COMPARE_DEST:
1541                 return "--compare-dest";
1542         case COPY_DEST:
1543                 return "--copy-dest";
1544         case LINK_DEST:
1545                 return "--link-dest";
1546         default:
1547                 NOISY_DEATH("Unknown alt_dest_opt type");
1548         }
1549 }
1550
1551 /**
1552  * Process command line arguments.  Called on both local and remote.
1553  *
1554  * @retval 1 if all options are OK; with globals set to appropriate
1555  * values
1556  *
1557  * @retval 0 on error, with err_buf containing an explanation
1558  **/
1559 int parse_arguments(int *argc_p, const char ***argv_p)
1560 {
1561         static poptContext pc;
1562         const char *arg, **argv = *argv_p;
1563         int argc = *argc_p;
1564         int opt, want_dest_type;
1565         int orig_protect_args = protect_args;
1566
1567         if (argc == 0) {
1568                 strlcpy(err_buf, "argc is zero!\n", sizeof err_buf);
1569                 return 0;
1570         }
1571
1572         set_refuse_options();
1573
1574 #ifdef ICONV_OPTION
1575         if (!am_daemon && protect_args <= 0 && (arg = getenv("RSYNC_ICONV")) != NULL && *arg)
1576                 iconv_opt = strdup(arg);
1577 #endif
1578
1579         /* TODO: Call poptReadDefaultConfig; handle errors. */
1580
1581         /* The context leaks in case of an error, but if there's a
1582          * problem we always exit anyhow. */
1583         if (pc)
1584                 poptFreeContext(pc);
1585         pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1586         if (!am_server) {
1587                 poptReadDefaultConfig(pc, 0);
1588                 popt_unalias(pc, "--daemon");
1589                 popt_unalias(pc, "--server");
1590         }
1591
1592         while ((opt = poptGetNextOpt(pc)) != -1) {
1593                 /* most options are handled automatically by popt;
1594                  * only special cases are returned and listed here. */
1595
1596                 switch (opt) {
1597                 case 'V':
1598                         version_opt_cnt++;
1599                         break;
1600
1601                 case OPT_SERVER:
1602                         if (!am_server) {
1603                                 /* Disable popt aliases on the server side and
1604                                  * then start parsing the options again. */
1605                                 poptFreeContext(pc);
1606                                 pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1607                                 am_server = 1;
1608                         }
1609 #ifdef ICONV_OPTION
1610                         iconv_opt = NULL;
1611 #endif
1612                         break;
1613
1614                 case OPT_SENDER:
1615                         if (!am_server) {
1616                                 usage(FERROR);
1617                                 exit_cleanup(RERR_SYNTAX);
1618                         }
1619                         am_sender = 1;
1620                         break;
1621
1622                 case OPT_DAEMON:
1623                         if (am_daemon) {
1624                                 strlcpy(err_buf,
1625                                         "Attempt to hack rsync thwarted!\n",
1626                                         sizeof err_buf);
1627                                 return 0;
1628                         }
1629 #ifdef ICONV_OPTION
1630                         iconv_opt = NULL;
1631 #endif
1632                         protect_args = 0;
1633                         poptFreeContext(pc);
1634                         pc = poptGetContext(RSYNC_NAME, argc, argv, long_daemon_options, 0);
1635                         while ((opt = poptGetNextOpt(pc)) != -1) {
1636                                 char **cpp;
1637                                 switch (opt) {
1638                                 case 'h':
1639                                         daemon_usage(FINFO);
1640                                         exit_cleanup(0);
1641
1642                                 case 'M':
1643                                         arg = poptGetOptArg(pc);
1644                                         if (!strchr(arg, '=')) {
1645                                                 rprintf(FERROR,
1646                                                         "--dparam value is missing an '=': %s\n",
1647                                                         arg);
1648                                                 goto daemon_error;
1649                                         }
1650                                         cpp = EXPAND_ITEM_LIST(&dparam_list, char *, 4);
1651                                         *cpp = strdup(arg);
1652                                         break;
1653
1654                                 case 'v':
1655                                         verbose++;
1656                                         break;
1657
1658                                 default:
1659                                         rprintf(FERROR,
1660                                                 "rsync: %s: %s (in daemon mode)\n",
1661                                                 poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1662                                                 poptStrerror(opt));
1663                                         goto daemon_error;
1664                                 }
1665                         }
1666
1667                         if (dparam_list.count && !set_dparams(1))
1668                                 exit_cleanup(RERR_SYNTAX);
1669
1670                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1671                                 snprintf(err_buf, sizeof err_buf,
1672                                          "the --temp-dir path is WAY too long.\n");
1673                                 return 0;
1674                         }
1675
1676                         if (!daemon_opt) {
1677                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
1678                             daemon_error:
1679                                 rprintf(FERROR, "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
1680                                 exit_cleanup(RERR_SYNTAX);
1681                         }
1682
1683                         *argv_p = argv = poptGetArgs(pc);
1684                         *argc_p = argc = count_args(argv);
1685                         am_starting_up = 0;
1686                         daemon_opt = 0;
1687                         am_daemon = 1;
1688                         return 1;
1689
1690                 case OPT_MODIFY_WINDOW:
1691                         /* The value has already been set by popt, but
1692                          * we need to remember that we're using a
1693                          * non-default setting. */
1694                         modify_window_set = 1;
1695                         break;
1696
1697                 case OPT_FILTER:
1698                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1699                                         rule_template(0), 0);
1700                         break;
1701
1702                 case OPT_EXCLUDE:
1703                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1704                                         rule_template(0), XFLG_OLD_PREFIXES);
1705                         break;
1706
1707                 case OPT_INCLUDE:
1708                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1709                                         rule_template(FILTRULE_INCLUDE), XFLG_OLD_PREFIXES);
1710                         break;
1711
1712                 case OPT_EXCLUDE_FROM:
1713                 case OPT_INCLUDE_FROM:
1714                         arg = poptGetOptArg(pc);
1715                         if (sanitize_paths)
1716                                 arg = sanitize_path(NULL, arg, NULL, 0, SP_DEFAULT);
1717                         if (daemon_filter_list.head) {
1718                                 int rej;
1719                                 char *cp = strdup(arg);
1720                                 if (!*cp)
1721                                         rej = 1;
1722                                 else {
1723                                         char *dir = cp + (*cp == '/' ? module_dirlen : 0);
1724                                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1725                                         rej = check_filter(&daemon_filter_list, FLOG, dir, 0) < 0;
1726                                 }
1727                                 free(cp);
1728                                 if (rej)
1729                                         goto options_rejected;
1730                         }
1731                         parse_filter_file(&filter_list, arg,
1732                                 rule_template(opt == OPT_INCLUDE_FROM ? FILTRULE_INCLUDE : 0),
1733                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
1734                         break;
1735
1736                 case 'a':
1737                         if (refused_archive_part) {
1738                                 create_refuse_error(refused_archive_part);
1739                                 return 0;
1740                         }
1741                         if (!recurse) /* preserve recurse == 2 */
1742                                 recurse = 1;
1743 #ifdef SUPPORT_LINKS
1744                         preserve_links = 1;
1745 #endif
1746                         preserve_perms = 1;
1747                         preserve_times = 1;
1748                         preserve_gid = 1;
1749                         preserve_uid = 1;
1750                         preserve_devices = 1;
1751                         preserve_specials = 1;
1752                         break;
1753
1754                 case 'D':
1755                         preserve_devices = preserve_specials = 1;
1756                         break;
1757
1758                 case OPT_NO_D:
1759                         preserve_devices = preserve_specials = 0;
1760                         break;
1761
1762                 case 'h':
1763                         human_readable++;
1764                         break;
1765
1766                 case 'H':
1767                         preserve_hard_links++;
1768                         break;
1769
1770                 case 'i':
1771                         itemize_changes++;
1772                         break;
1773
1774                 case 'U':
1775                         if (++preserve_atimes > 1)
1776                                 open_noatime = 1;
1777                         break;
1778
1779                 case 'v':
1780                         verbose++;
1781                         break;
1782
1783                 case 'y':
1784                         fuzzy_basis++;
1785                         break;
1786
1787                 case 'q':
1788                         quiet++;
1789                         break;
1790
1791                 case 'x':
1792                         one_file_system++;
1793                         break;
1794
1795                 case 'F':
1796                         switch (++F_option_cnt) {
1797                         case 1:
1798                                 parse_filter_str(&filter_list,": /.rsync-filter",rule_template(0),0);
1799                                 break;
1800                         case 2:
1801                                 parse_filter_str(&filter_list,"- .rsync-filter",rule_template(0),0);
1802                                 break;
1803                         }
1804                         break;
1805
1806                 case 'P':
1807                         if (refused_partial || refused_progress) {
1808                                 create_refuse_error(refused_partial ? refused_partial : refused_progress);
1809                                 return 0;
1810                         }
1811                         do_progress = 1;
1812                         keep_partial = 1;
1813                         break;
1814
1815                 case 'z':
1816                         do_compression++;
1817                         break;
1818
1819                 case OPT_OLD_COMPRESS:
1820                         compress_choice = "zlib";
1821                         break;
1822
1823                 case OPT_NEW_COMPRESS:
1824                         compress_choice = "zlibx";
1825                         break;
1826
1827                 case OPT_NO_COMPRESS:
1828                         do_compression = 0;
1829                         compress_choice = NULL;
1830                         break;
1831
1832                 case 'M':
1833                         arg = poptGetOptArg(pc);
1834                         if (*arg != '-') {
1835                                 snprintf(err_buf, sizeof err_buf,
1836                                         "Remote option must start with a dash: %s\n", arg);
1837                                 return 0;
1838                         }
1839                         if (remote_option_cnt+2 >= remote_option_alloc) {
1840                                 remote_option_alloc += 16;
1841                                 remote_options = realloc_array(remote_options,
1842                                                         const char *, remote_option_alloc);
1843                                 if (!remote_option_cnt)
1844                                         remote_options[0] = "ARG0";
1845                         }
1846                         remote_options[++remote_option_cnt] = arg;
1847                         remote_options[remote_option_cnt+1] = NULL;
1848                         break;
1849
1850                 case OPT_WRITE_BATCH:
1851                         /* batch_name is already set */
1852                         write_batch = 1;
1853                         break;
1854
1855                 case OPT_ONLY_WRITE_BATCH:
1856                         /* batch_name is already set */
1857                         write_batch = -1;
1858                         break;
1859
1860                 case OPT_READ_BATCH:
1861                         /* batch_name is already set */
1862                         read_batch = 1;
1863                         break;
1864
1865                 case OPT_NO_ICONV:
1866 #ifdef ICONV_OPTION
1867                         iconv_opt = NULL;
1868 #endif
1869                         break;
1870
1871                 case OPT_BLOCK_SIZE: {
1872                         /* We may not know the real protocol_version at this point if this is the client
1873                          * option parsing, but we still want to check it so that the client can specify
1874                          * a --protocol=29 option with a larger block size. */
1875                         int max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
1876                         ssize_t size;
1877                         arg = poptGetOptArg(pc);
1878                         if ((size = parse_size_arg(arg, 'b', "block-size", 0, max_blength, False)) < 0)
1879                                 return 0;
1880                         block_size = (int32)size;
1881                         break;
1882                 }
1883
1884                 case OPT_MAX_SIZE:
1885                         if ((max_size = parse_size_arg(max_size_arg, 'b', "max-size", 0, -1, False)) < 0)
1886                                 return 0;
1887                         max_size_arg = strdup(do_big_num(max_size, 0, NULL));
1888                         break;
1889
1890                 case OPT_MIN_SIZE:
1891                         if ((min_size = parse_size_arg(min_size_arg, 'b', "min-size", 0, -1, False)) < 0)
1892                                 return 0;
1893                         min_size_arg = strdup(do_big_num(min_size, 0, NULL));
1894                         break;
1895
1896                 case OPT_BWLIMIT: {
1897                         ssize_t size = parse_size_arg(bwlimit_arg, 'K', "bwlimit", 512, -1, True);
1898                         if (size < 0)
1899                                 return 0;
1900                         bwlimit_arg = strdup(do_big_num(size, 0, NULL));
1901                         bwlimit = (size + 512) / 1024;
1902                         break;
1903                 }
1904
1905                 case OPT_APPEND:
1906                         if (am_server)
1907                                 append_mode++;
1908                         else
1909                                 append_mode = 1;
1910                         break;
1911
1912                 case OPT_LINK_DEST:
1913                         want_dest_type = LINK_DEST;
1914                         goto set_dest_dir;
1915
1916                 case OPT_COPY_DEST:
1917                         want_dest_type = COPY_DEST;
1918                         goto set_dest_dir;
1919
1920                 case OPT_COMPARE_DEST:
1921                         want_dest_type = COMPARE_DEST;
1922
1923                 set_dest_dir:
1924                         if (alt_dest_type && alt_dest_type != want_dest_type) {
1925                                 snprintf(err_buf, sizeof err_buf,
1926                                         "ERROR: the %s option conflicts with the %s option\n",
1927                                         alt_dest_opt(want_dest_type), alt_dest_opt(0));
1928                                 return 0;
1929                         }
1930                         alt_dest_type = want_dest_type;
1931
1932                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1933                                 snprintf(err_buf, sizeof err_buf,
1934                                         "ERROR: at most %d %s args may be specified\n",
1935                                         MAX_BASIS_DIRS, alt_dest_opt(0));
1936                                 return 0;
1937                         }
1938                         /* We defer sanitizing this arg until we know what
1939                          * our destination directory is going to be. */
1940                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1941                         break;
1942
1943                 case OPT_CHMOD:
1944                         arg = poptGetOptArg(pc);
1945                         if (!parse_chmod(arg, &chmod_modes)) {
1946                                 snprintf(err_buf, sizeof err_buf,
1947                                         "Invalid argument passed to --chmod (%s)\n",
1948                                         arg);
1949                                 return 0;
1950                         }
1951                         break;
1952
1953                 case OPT_INFO:
1954                         arg = poptGetOptArg(pc);
1955                         parse_output_words(info_words, info_levels, arg, USER_PRIORITY);
1956                         break;
1957
1958                 case OPT_DEBUG:
1959                         arg = poptGetOptArg(pc);
1960                         parse_output_words(debug_words, debug_levels, arg, USER_PRIORITY);
1961                         break;
1962
1963                 case OPT_USERMAP:
1964                         if (usermap) {
1965                                 if (usermap_via_chown) {
1966                                         snprintf(err_buf, sizeof err_buf,
1967                                                 "--usermap conflicts with prior --chown.\n");
1968                                         return 0;
1969                                 }
1970                                 snprintf(err_buf, sizeof err_buf,
1971                                         "You can only specify --usermap once.\n");
1972                                 return 0;
1973                         }
1974                         usermap = (char *)poptGetOptArg(pc);
1975                         usermap_via_chown = False;
1976                         break;
1977
1978                 case OPT_GROUPMAP:
1979                         if (groupmap) {
1980                                 if (groupmap_via_chown) {
1981                                         snprintf(err_buf, sizeof err_buf,
1982                                                 "--groupmap conflicts with prior --chown.\n");
1983                                         return 0;
1984                                 }
1985                                 snprintf(err_buf, sizeof err_buf,
1986                                         "You can only specify --groupmap once.\n");
1987                                 return 0;
1988                         }
1989                         groupmap = (char *)poptGetOptArg(pc);
1990                         groupmap_via_chown = False;
1991                         break;
1992
1993                 case OPT_CHOWN: {
1994                         const char *chown = poptGetOptArg(pc);
1995                         int len;
1996                         if ((arg = strchr(chown, ':')) != NULL)
1997                                 len = arg++ - chown;
1998                         else
1999                                 len = strlen(chown);
2000                         if (len) {
2001                                 if (usermap) {
2002                                         if (!usermap_via_chown) {
2003                                                 snprintf(err_buf, sizeof err_buf,
2004                                                         "--chown conflicts with prior --usermap.\n");
2005                                                 return 0;
2006                                         }
2007                                         snprintf(err_buf, sizeof err_buf,
2008                                                 "You can only specify a user-affecting --chown once.\n");
2009                                         return 0;
2010                                 }
2011                                 if (asprintf(&usermap, "*:%.*s", len, chown) < 0)
2012                                         out_of_memory("parse_arguments");
2013                                 usermap_via_chown = True;
2014                         }
2015                         if (arg && *arg) {
2016                                 if (groupmap) {
2017                                         if (!groupmap_via_chown) {
2018                                                 snprintf(err_buf, sizeof err_buf,
2019                                                         "--chown conflicts with prior --groupmap.\n");
2020                                                 return 0;
2021                                         }
2022                                         snprintf(err_buf, sizeof err_buf,
2023                                                 "You can only specify a group-affecting --chown once.\n");
2024                                         return 0;
2025                                 }
2026                                 if (asprintf(&groupmap, "*:%s", arg) < 0)
2027                                         out_of_memory("parse_arguments");
2028                                 groupmap_via_chown = True;
2029                         }
2030                         break;
2031                 }
2032
2033                 case OPT_HELP:
2034                         usage(FINFO);
2035                         exit_cleanup(0);
2036
2037                 case 'A':
2038 #ifdef SUPPORT_ACLS
2039                         preserve_acls = 1;
2040                         preserve_perms = 1;
2041                         break;
2042 #else
2043                         /* FIXME: this should probably be ignored with a
2044                          * warning and then countermeasures taken to
2045                          * restrict group and other access in the presence
2046                          * of any more restrictive ACLs, but this is safe
2047                          * for now */
2048                         snprintf(err_buf,sizeof(err_buf),
2049                                  "ACLs are not supported on this %s\n",
2050                                  am_server ? "server" : "client");
2051                         return 0;
2052 #endif
2053
2054                 case 'X':
2055 #ifdef SUPPORT_XATTRS
2056                         preserve_xattrs++;
2057                         break;
2058 #else
2059                         snprintf(err_buf,sizeof(err_buf),
2060                                  "extended attributes are not supported on this %s\n",
2061                                  am_server ? "server" : "client");
2062                         return 0;
2063 #endif
2064
2065                 case OPT_STOP_AFTER: {
2066                         long val;
2067                         arg = poptGetOptArg(pc);
2068                         stop_at_utime = time(NULL);
2069                         if ((val = atol(arg) * 60) <= 0 || LONG_MAX - val < stop_at_utime || (long)(time_t)val != val) {
2070                                 snprintf(err_buf, sizeof err_buf, "invalid --stop-after value: %s\n", arg);
2071                                 return 0;
2072                         }
2073                         stop_at_utime += val;
2074                         break;
2075                 }
2076
2077 #ifdef HAVE_MKTIME
2078                 case OPT_STOP_AT:
2079                         arg = poptGetOptArg(pc);
2080                         if ((stop_at_utime = parse_time(arg)) == (time_t)-1) {
2081                                 snprintf(err_buf, sizeof err_buf, "invalid --stop-at format: %s\n", arg);
2082                                 return 0;
2083                         }
2084                         if (stop_at_utime <= time(NULL)) {
2085                                 snprintf(err_buf, sizeof err_buf, "--stop-at time is not in the future: %s\n", arg);
2086                                 return 0;
2087                         }
2088                         break;
2089 #endif
2090
2091                 default:
2092                         /* A large opt value means that set_refuse_options()
2093                          * turned this option off. */
2094                         if (opt >= OPT_REFUSED_BASE) {
2095                                 create_refuse_error(opt);
2096                                 return 0;
2097                         }
2098                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
2099                                  am_server ? "on remote machine: " : "",
2100                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
2101                                  poptStrerror(opt));
2102                         return 0;
2103                 }
2104         }
2105
2106         if (version_opt_cnt) {
2107                 print_rsync_version(FINFO);
2108                 exit_cleanup(0);
2109         }
2110
2111         if (!max_alloc_arg) {
2112                 max_alloc_arg = getenv("RSYNC_MAX_ALLOC");
2113                 if (max_alloc_arg && !*max_alloc_arg)
2114                         max_alloc_arg = NULL;
2115         }
2116         if (max_alloc_arg) {
2117                 ssize_t size = parse_size_arg(max_alloc_arg, 'B', "max-alloc", 1024*1024, -1, True);
2118                 if (size < 0)
2119                         return 0;
2120                 max_alloc = size;
2121         }
2122
2123         if (protect_args < 0) {
2124                 if (am_server)
2125                         protect_args = 0;
2126                 else if ((arg = getenv("RSYNC_PROTECT_ARGS")) != NULL && *arg)
2127                         protect_args = atoi(arg) ? 1 : 0;
2128                 else {
2129 #ifdef RSYNC_USE_PROTECTED_ARGS
2130                         protect_args = 1;
2131 #else
2132                         protect_args = 0;
2133 #endif
2134                 }
2135         }
2136
2137         if (checksum_choice && strcasecmp(checksum_choice, "auto") != 0 && strcasecmp(checksum_choice, "auto,auto") != 0) {
2138                 /* Call this early to verify the args and figure out if we need to force
2139                  * --whole-file. Note that the parse function will get called again later,
2140                  * just in case an "auto" choice needs to know the protocol_version. */
2141                 parse_checksum_choice(0);
2142         } else
2143                 checksum_choice = NULL;
2144
2145         if (human_readable > 1 && argc == 2 && !am_server) {
2146                 /* Allow the old meaning of 'h' (--help) on its own. */
2147                 usage(FINFO);
2148                 exit_cleanup(0);
2149         }
2150
2151         if (!compress_choice && do_compression > 1)
2152                 compress_choice = "zlibx";
2153         if (compress_choice && strcasecmp(compress_choice, "auto") != 0)
2154                 parse_compress_choice(0); /* Twiddles do_compression and can possibly NULL-out compress_choice. */
2155         else
2156                 compress_choice = NULL;
2157
2158         if (do_compression || do_compression_level != CLVL_NOT_SPECIFIED) {
2159                 if (!do_compression)
2160                         do_compression = CPRES_AUTO;
2161                 if (do_compression && refused_compress) {
2162                         create_refuse_error(refused_compress);
2163                         return 0;
2164                 }
2165         }
2166
2167 #ifdef HAVE_SETVBUF
2168         if (outbuf_mode && !am_server) {
2169                 int mode = *(uchar *)outbuf_mode;
2170                 if (islower(mode))
2171                         mode = toupper(mode);
2172                 fflush(stdout); /* Just in case... */
2173                 switch (mode) {
2174                 case 'N': /* None */
2175                 case 'U': /* Unbuffered */
2176                         mode = _IONBF;
2177                         break;
2178                 case 'L': /* Line */
2179                         mode = _IOLBF;
2180                         break;
2181                 case 'B': /* Block */
2182                 case 'F': /* Full */
2183                         mode = _IOFBF;
2184                         break;
2185                 default:
2186                         snprintf(err_buf, sizeof err_buf,
2187                                 "Invalid --outbuf setting -- specify N, L, or B.\n");
2188                         return 0;
2189                 }
2190                 setvbuf(stdout, (char *)NULL, mode, 0);
2191         }
2192
2193         if (msgs2stderr == 1) { /* Are all messages going to stderr? */
2194                 /* Make stderr line buffered for better sharing of the stream. */
2195                 fflush(stderr); /* Just in case... */
2196                 setvbuf(stderr, (char *)NULL, _IOLBF, 0);
2197         }
2198 #endif
2199
2200         set_output_verbosity(verbose, DEFAULT_PRIORITY);
2201
2202         if (do_stats) {
2203                 parse_output_words(info_words, info_levels,
2204                         verbose > 1 ? "stats3" : "stats2", DEFAULT_PRIORITY);
2205         }
2206
2207 #ifdef ICONV_OPTION
2208         if (iconv_opt && protect_args != 2) {
2209                 if (!am_server && strcmp(iconv_opt, "-") == 0)
2210                         iconv_opt = NULL;
2211                 else
2212                         need_unsorted_flist = 1;
2213         }
2214         if (refused_no_iconv && !iconv_opt) {
2215                 create_refuse_error(refused_no_iconv);
2216                 return 0;
2217         }
2218 #endif
2219
2220         if (fuzzy_basis > 1)
2221                 fuzzy_basis = basis_dir_cnt + 1;
2222
2223         /* Don't let the client reset protect_args if it was already processed */
2224         if (orig_protect_args == 2 && am_server)
2225                 protect_args = orig_protect_args;
2226
2227         if (protect_args == 1 && am_server)
2228                 return 1;
2229
2230         *argv_p = argv = poptGetArgs(pc);
2231         *argc_p = argc = count_args(argv);
2232
2233 #ifndef SUPPORT_LINKS
2234         if (preserve_links && !am_sender) {
2235                 snprintf(err_buf, sizeof err_buf,
2236                          "symlinks are not supported on this %s\n",
2237                          am_server ? "server" : "client");
2238                 return 0;
2239         }
2240 #endif
2241
2242 #ifndef SUPPORT_HARD_LINKS
2243         if (preserve_hard_links) {
2244                 snprintf(err_buf, sizeof err_buf,
2245                          "hard links are not supported on this %s\n",
2246                          am_server ? "server" : "client");
2247                 return 0;
2248         }
2249 #endif
2250
2251 #ifdef SUPPORT_XATTRS
2252         if (am_root < 0 && preserve_xattrs > 1) {
2253                 snprintf(err_buf, sizeof err_buf,
2254                          "--fake-super conflicts with -XX\n");
2255                 return 0;
2256         }
2257 #else
2258         if (am_root < 0) {
2259                 snprintf(err_buf, sizeof err_buf,
2260                          "--fake-super requires an rsync with extended attributes enabled\n");
2261                 return 0;
2262         }
2263 #endif
2264
2265         if (write_batch && read_batch) {
2266                 snprintf(err_buf, sizeof err_buf,
2267                         "--write-batch and --read-batch can not be used together\n");
2268                 return 0;
2269         }
2270         if (write_batch > 0 || read_batch) {
2271                 if (am_server) {
2272                         rprintf(FINFO,
2273                                 "ignoring --%s-batch option sent to server\n",
2274                                 write_batch ? "write" : "read");
2275                         /* We don't actually exit_cleanup(), so that we can
2276                          * still service older version clients that still send
2277                          * batch args to server. */
2278                         read_batch = write_batch = 0;
2279                         batch_name = NULL;
2280                 } else if (dry_run)
2281                         write_batch = 0;
2282         } else if (write_batch < 0 && dry_run)
2283                 write_batch = 0;
2284         if (read_batch && files_from) {
2285                 snprintf(err_buf, sizeof err_buf,
2286                         "--read-batch cannot be used with --files-from\n");
2287                 return 0;
2288         }
2289         if (read_batch && remove_source_files) {
2290                 snprintf(err_buf, sizeof err_buf,
2291                         "--read-batch cannot be used with --remove-%s-files\n",
2292                         remove_source_files == 1 ? "source" : "sent");
2293                 return 0;
2294         }
2295         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
2296                 snprintf(err_buf, sizeof err_buf,
2297                         "the batch-file name must be %d characters or less.\n",
2298                         MAX_BATCH_NAME_LEN);
2299                 return 0;
2300         }
2301
2302         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
2303                 snprintf(err_buf, sizeof err_buf,
2304                          "the --temp-dir path is WAY too long.\n");
2305                 return 0;
2306         }
2307
2308         if (max_delete < 0 && max_delete != INT_MIN) {
2309                 /* Negative numbers are treated as "no deletions". */
2310                 max_delete = 0;
2311         }
2312
2313         if (files_from) {
2314                 if (recurse == 1) /* preserve recurse == 2 */
2315                         recurse = 0;
2316                 if (xfer_dirs < 0)
2317                         xfer_dirs = 1;
2318         }
2319
2320         if (argc < 2 && !read_batch && !am_server)
2321                 list_only |= 1;
2322
2323         if (xfer_dirs >= 4) {
2324                 parse_filter_str(&filter_list, "- /*/*", rule_template(0), 0);
2325                 recurse = xfer_dirs = 1;
2326         } else if (recurse)
2327                 xfer_dirs = 1;
2328         else if (xfer_dirs < 0)
2329                 xfer_dirs = list_only ? 1 : 0;
2330
2331         if (relative_paths < 0)
2332                 relative_paths = files_from? 1 : 0;
2333         if (!relative_paths)
2334                 implied_dirs = 0;
2335
2336         if (delete_before + !!delete_during + delete_after > 1) {
2337                 snprintf(err_buf, sizeof err_buf,
2338                         "You may not combine multiple --delete-WHEN options.\n");
2339                 return 0;
2340         }
2341         if (delete_before || delete_during || delete_after)
2342                 delete_mode = 1;
2343         else if (delete_mode || delete_excluded) {
2344                 /* Only choose now between before & during if one is refused. */
2345                 if (refused_delete_before) {
2346                         if (!refused_delete_during)
2347                                 delete_during = 1;
2348                         else {
2349                                 create_refuse_error(refused_delete_before);
2350                                 return 0;
2351                         }
2352                 } else if (refused_delete_during)
2353                         delete_before = 1;
2354                 delete_mode = 1;
2355         }
2356         if (!xfer_dirs && delete_mode) {
2357                 snprintf(err_buf, sizeof err_buf,
2358                         "--delete does not work without --recursive (-r) or --dirs (-d).\n");
2359                 return 0;
2360         }
2361
2362         if (missing_args == 3) /* simplify if both options were specified */
2363                 missing_args = 2;
2364         if (refused_delete && (delete_mode || missing_args == 2)) {
2365                 create_refuse_error(refused_delete);
2366                 return 0;
2367         }
2368
2369         if (remove_source_files) {
2370                 /* We only want to infer this refusal of --remove-source-files
2371                  * via the refusal of "delete", not any of the "delete-FOO"
2372                  * options. */
2373                 if (refused_delete && am_sender) {
2374                         create_refuse_error(refused_delete);
2375                         return 0;
2376                 }
2377                 need_messages_from_generator = 1;
2378         }
2379
2380         if (munge_symlinks && !am_daemon) {
2381                 STRUCT_STAT st;
2382                 char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */
2383                 strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */
2384                 if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) {
2385                         rprintf(FERROR, "Symlink munging is unsafe when a %s directory exists.\n",
2386                                 prefix);
2387                         exit_cleanup(RERR_UNSUPPORTED);
2388                 }
2389         }
2390
2391         if (sanitize_paths) {
2392                 int i;
2393                 for (i = argc; i-- > 0; )
2394                         argv[i] = sanitize_path(NULL, argv[i], "", 0, SP_KEEP_DOT_DIRS);
2395                 if (tmpdir)
2396                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, SP_DEFAULT);
2397                 if (backup_dir)
2398                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, SP_DEFAULT);
2399         }
2400         if (daemon_filter_list.head && !am_sender) {
2401                 filter_rule_list *elp = &daemon_filter_list;
2402                 if (tmpdir) {
2403                         char *dir;
2404                         if (!*tmpdir)
2405                                 goto options_rejected;
2406                         dir = tmpdir + (*tmpdir == '/' ? module_dirlen : 0);
2407                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2408                         if (check_filter(elp, FLOG, dir, 1) < 0)
2409                                 goto options_rejected;
2410                 }
2411                 if (backup_dir) {
2412                         char *dir;
2413                         if (!*backup_dir)
2414                                 goto options_rejected;
2415                         dir = backup_dir + (*backup_dir == '/' ? module_dirlen : 0);
2416                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2417                         if (check_filter(elp, FLOG, dir, 1) < 0)
2418                                 goto options_rejected;
2419                 }
2420         }
2421
2422         if (!backup_suffix)
2423                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
2424         backup_suffix_len = strlen(backup_suffix);
2425         if (strchr(backup_suffix, '/') != NULL) {
2426                 snprintf(err_buf, sizeof err_buf,
2427                         "--suffix cannot contain slashes: %s\n",
2428                         backup_suffix);
2429                 return 0;
2430         }
2431         if (backup_dir) {
2432                 size_t len;
2433                 make_backups = 1; /* --backup-dir implies --backup */
2434                 while (*backup_dir == '.' && backup_dir[1] == '/')
2435                         backup_dir += 2;
2436                 if (*backup_dir == '.' && backup_dir[1] == '\0')
2437                         backup_dir++;
2438                 len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
2439                 if (len > sizeof backup_dir_buf - 128) {
2440                         snprintf(err_buf, sizeof err_buf,
2441                                 "the --backup-dir path is WAY too long.\n");
2442                         return 0;
2443                 }
2444                 backup_dir_len = (int)len;
2445                 if (!backup_dir_len) {
2446                         backup_dir_len = -1;
2447                         backup_dir = NULL;
2448                 } else if (backup_dir_buf[backup_dir_len - 1] != '/') {
2449                         backup_dir_buf[backup_dir_len++] = '/';
2450                         backup_dir_buf[backup_dir_len] = '\0';
2451                 }
2452                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
2453         }
2454         if (backup_dir) {
2455                 /* No need for a suffix or a protect rule. */
2456         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
2457                 snprintf(err_buf, sizeof err_buf,
2458                         "--suffix cannot be empty %s\n", backup_dir_len < 0
2459                         ? "when --backup-dir is the same as the dest dir"
2460                         : "without a --backup-dir");
2461                 return 0;
2462         } else if (make_backups && delete_mode && !delete_excluded && !am_server) {
2463                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
2464                         "P *%s", backup_suffix);
2465                 parse_filter_str(&filter_list, backup_dir_buf, rule_template(0), 0);
2466         }
2467
2468         if (preserve_times) {
2469                 preserve_times = PRESERVE_FILE_TIMES;
2470                 if (!omit_dir_times)
2471                         preserve_times |= PRESERVE_DIR_TIMES;
2472 #ifdef CAN_SET_SYMLINK_TIMES
2473                 if (!omit_link_times)
2474                         preserve_times |= PRESERVE_LINK_TIMES;
2475 #endif
2476         }
2477
2478         if (make_backups && !backup_dir) {
2479                 omit_dir_times = 0; /* Implied, so avoid -O to sender. */
2480                 preserve_times &= ~PRESERVE_DIR_TIMES;
2481         }
2482
2483         if (stdout_format) {
2484                 if (am_server && log_format_has(stdout_format, 'I'))
2485                         stdout_format_has_i = 2;
2486                 else if (log_format_has(stdout_format, 'i'))
2487                         stdout_format_has_i = itemize_changes | 1;
2488                 if (!log_format_has(stdout_format, 'b')
2489                  && !log_format_has(stdout_format, 'c')
2490                  && !log_format_has(stdout_format, 'C'))
2491                         log_before_transfer = !am_server;
2492         } else if (itemize_changes) {
2493                 stdout_format = "%i %n%L";
2494                 stdout_format_has_i = itemize_changes;
2495                 log_before_transfer = !am_server;
2496         }
2497
2498         if (do_progress && !am_server) {
2499                 if (!log_before_transfer && INFO_EQ(NAME, 0))
2500                         parse_output_words(info_words, info_levels, "name", DEFAULT_PRIORITY);
2501                 parse_output_words(info_words, info_levels, "flist2,progress", DEFAULT_PRIORITY);
2502         }
2503
2504         if (dry_run)
2505                 do_xfers = 0;
2506
2507         set_io_timeout(io_timeout);
2508
2509         if (INFO_GTE(NAME, 1) && !stdout_format) {
2510                 stdout_format = "%n%L";
2511                 log_before_transfer = !am_server;
2512         }
2513         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
2514                 stdout_format_has_o_or_i = 1;
2515
2516         if (logfile_name && !am_daemon) {
2517                 if (!logfile_format) {
2518                         logfile_format = "%i %n%L";
2519                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
2520                 } else {
2521                         if (log_format_has(logfile_format, 'i'))
2522                                 logfile_format_has_i = 1;
2523                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
2524                                 logfile_format_has_o_or_i = 1;
2525                 }
2526                 log_init(0);
2527         } else if (!am_daemon)
2528                 logfile_format = NULL;
2529
2530         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
2531                 bwlimit = daemon_bwlimit;
2532         if (bwlimit) {
2533                 bwlimit_writemax = (size_t)bwlimit * 128;
2534                 if (bwlimit_writemax < 512)
2535                         bwlimit_writemax = 512;
2536         }
2537
2538         if (append_mode) {
2539                 if (whole_file > 0) {
2540                         snprintf(err_buf, sizeof err_buf,
2541                                  "--append cannot be used with --whole-file\n");
2542                         return 0;
2543                 }
2544                 if (refused_inplace) {
2545                         create_refuse_error(refused_inplace);
2546                         return 0;
2547                 }
2548                 inplace = 1;
2549         }
2550
2551         if (write_devices) {
2552                 if (refused_inplace) {
2553                         create_refuse_error(refused_inplace);
2554                         return 0;
2555                 }
2556                 inplace = 1;
2557         }
2558
2559         if (delay_updates && !partial_dir)
2560                 partial_dir = tmp_partialdir;
2561
2562         if (inplace) {
2563 #ifdef HAVE_FTRUNCATE
2564                 if (partial_dir) {
2565                         snprintf(err_buf, sizeof err_buf,
2566                                  "--%s cannot be used with --%s\n",
2567                                  append_mode ? "append" : "inplace",
2568                                  delay_updates ? "delay-updates" : "partial-dir");
2569                         return 0;
2570                 }
2571                 /* --inplace implies --partial for refusal purposes, but we
2572                  * clear the keep_partial flag for internal logic purposes. */
2573                 if (refused_partial) {
2574                         create_refuse_error(refused_partial);
2575                         return 0;
2576                 }
2577                 keep_partial = 0;
2578 #else
2579                 snprintf(err_buf, sizeof err_buf,
2580                          "--%s is not supported on this %s\n",
2581                          append_mode ? "append" : "inplace",
2582                          am_server ? "server" : "client");
2583                 return 0;
2584 #endif
2585         } else {
2586                 if (keep_partial && !partial_dir && !am_server) {
2587                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
2588                                 partial_dir = strdup(arg);
2589                 }
2590                 if (partial_dir) {
2591                         if (*partial_dir)
2592                                 clean_fname(partial_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2593                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
2594                                 partial_dir = NULL;
2595                         if (!partial_dir && refused_partial) {
2596                                 create_refuse_error(refused_partial);
2597                                 return 0;
2598                         }
2599                         keep_partial = 1;
2600                 }
2601         }
2602
2603         if (files_from) {
2604                 char *h, *p;
2605                 int q;
2606                 if (argc > 2 || (!am_daemon && !am_server && argc == 1)) {
2607                         usage(FERROR);
2608                         exit_cleanup(RERR_SYNTAX);
2609                 }
2610                 if (strcmp(files_from, "-") == 0) {
2611                         filesfrom_fd = 0;
2612                         if (am_server)
2613                                 filesfrom_host = ""; /* reading from socket */
2614                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
2615                         if (am_server) {
2616                                 snprintf(err_buf, sizeof err_buf,
2617                                         "The --files-from sent to the server cannot specify a host.\n");
2618                                 return 0;
2619                         }
2620                         files_from = p;
2621                         filesfrom_host = h;
2622                         if (strcmp(files_from, "-") == 0) {
2623                                 snprintf(err_buf, sizeof err_buf,
2624                                         "Invalid --files-from remote filename\n");
2625                                 return 0;
2626                         }
2627                 } else {
2628                         if (sanitize_paths)
2629                                 files_from = sanitize_path(NULL, files_from, NULL, 0, SP_DEFAULT);
2630                         if (daemon_filter_list.head) {
2631                                 char *dir;
2632                                 if (!*files_from)
2633                                         goto options_rejected;
2634                                 dir = files_from + (*files_from == '/' ? module_dirlen : 0);
2635                                 clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2636                                 if (check_filter(&daemon_filter_list, FLOG, dir, 0) < 0)
2637                                         goto options_rejected;
2638                         }
2639                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
2640                         if (filesfrom_fd < 0) {
2641                                 snprintf(err_buf, sizeof err_buf,
2642                                         "failed to open files-from file %s: %s\n",
2643                                         files_from, strerror(errno));
2644                                 return 0;
2645                         }
2646                 }
2647         }
2648
2649         am_starting_up = 0;
2650
2651         return 1;
2652
2653   options_rejected:
2654         snprintf(err_buf, sizeof err_buf,
2655                 "Your options have been rejected by the server.\n");
2656         return 0;
2657 }
2658
2659
2660 /**
2661  * Construct a filtered list of options to pass through from the
2662  * client to the server.
2663  *
2664  * This involves setting options that will tell the server how to
2665  * behave, and also filtering out options that are processed only
2666  * locally.
2667  **/
2668 void server_options(char **args, int *argc_p)
2669 {
2670         static char argstr[64];
2671         int ac = *argc_p;
2672         uchar where;
2673         char *arg;
2674         int i, x;
2675
2676         /* This should always remain first on the server's command-line. */
2677         args[ac++] = "--server";
2678
2679         if (daemon_over_rsh > 0) {
2680                 args[ac++] = "--daemon";
2681                 *argc_p = ac;
2682                 /* if we're passing --daemon, we're done */
2683                 return;
2684         }
2685
2686         if (!am_sender)
2687                 args[ac++] = "--sender";
2688
2689         x = 1;
2690         argstr[0] = '-';
2691
2692         if (protect_args)
2693                 argstr[x++] = 's';
2694
2695         for (i = 0; i < verbose; i++)
2696                 argstr[x++] = 'v';
2697
2698         if (quiet && msgs2stderr)
2699                 argstr[x++] = 'q';
2700         if (make_backups)
2701                 argstr[x++] = 'b';
2702         if (update_only)
2703                 argstr[x++] = 'u';
2704         if (!do_xfers) /* Note: NOT "dry_run"! */
2705                 argstr[x++] = 'n';
2706         if (preserve_links)
2707                 argstr[x++] = 'l';
2708         if ((xfer_dirs >= 2 && xfer_dirs < 4)
2709          || (xfer_dirs && !recurse && (list_only || (delete_mode && am_sender))))
2710                 argstr[x++] = 'd';
2711         if (am_sender) {
2712                 if (keep_dirlinks)
2713                         argstr[x++] = 'K';
2714                 if (prune_empty_dirs)
2715                         argstr[x++] = 'm';
2716                 if (omit_dir_times)
2717                         argstr[x++] = 'O';
2718                 if (omit_link_times)
2719                         argstr[x++] = 'J';
2720                 if (fuzzy_basis) {
2721                         argstr[x++] = 'y';
2722                         if (fuzzy_basis > 1)
2723                                 argstr[x++] = 'y';
2724                 }
2725         } else {
2726                 if (copy_links)
2727                         argstr[x++] = 'L';
2728                 if (copy_dirlinks)
2729                         argstr[x++] = 'k';
2730         }
2731
2732         if (whole_file > 0)
2733                 argstr[x++] = 'W';
2734         /* We don't need to send --no-whole-file, because it's the
2735          * default for remote transfers, and in any case old versions
2736          * of rsync will not understand it. */
2737
2738         if (preserve_hard_links) {
2739                 argstr[x++] = 'H';
2740                 if (preserve_hard_links > 1)
2741                         argstr[x++] = 'H';
2742         }
2743         if (preserve_uid)
2744                 argstr[x++] = 'o';
2745         if (preserve_gid)
2746                 argstr[x++] = 'g';
2747         if (preserve_devices) /* ignore preserve_specials here */
2748                 argstr[x++] = 'D';
2749         if (preserve_times)
2750                 argstr[x++] = 't';
2751         if (preserve_atimes) {
2752                 argstr[x++] = 'U';
2753                 if (preserve_atimes > 1)
2754                         argstr[x++] = 'U';
2755         }
2756 #ifdef SUPPORT_CRTIMES
2757         if (preserve_crtimes)
2758                 argstr[x++] = 'N';
2759 #endif
2760         if (preserve_perms)
2761                 argstr[x++] = 'p';
2762         else if (preserve_executability && am_sender)
2763                 argstr[x++] = 'E';
2764 #ifdef SUPPORT_ACLS
2765         if (preserve_acls)
2766                 argstr[x++] = 'A';
2767 #endif
2768 #ifdef SUPPORT_XATTRS
2769         if (preserve_xattrs) {
2770                 argstr[x++] = 'X';
2771                 if (preserve_xattrs > 1)
2772                         argstr[x++] = 'X';
2773         }
2774 #endif
2775         if (recurse)
2776                 argstr[x++] = 'r';
2777         if (always_checksum)
2778                 argstr[x++] = 'c';
2779         if (cvs_exclude)
2780                 argstr[x++] = 'C';
2781         if (ignore_times)
2782                 argstr[x++] = 'I';
2783         if (relative_paths)
2784                 argstr[x++] = 'R';
2785         if (one_file_system) {
2786                 argstr[x++] = 'x';
2787                 if (one_file_system > 1)
2788                         argstr[x++] = 'x';
2789         }
2790         if (sparse_files)
2791                 argstr[x++] = 'S';
2792         if (do_compression == CPRES_ZLIB)
2793                 argstr[x++] = 'z';
2794
2795         set_allow_inc_recurse();
2796
2797         /* We don't really know the actual protocol_version at this point,
2798          * but checking the pre-negotiated value allows the user to use a
2799          * --protocol=29 override to avoid the use of this -eFLAGS opt. */
2800         if (protocol_version >= 30) {
2801                 /* Use "eFlags" alias so that cull_options doesn't think that these are no-arg option letters. */
2802 #define eFlags argstr
2803                 /* We make use of the -e option to let the server know about
2804                  * any pre-release protocol version && some behavior flags. */
2805                 eFlags[x++] = 'e';
2806 #if SUBPROTOCOL_VERSION != 0
2807                 if (protocol_version == PROTOCOL_VERSION) {
2808                         x += snprintf(argstr+x, sizeof argstr - x,
2809                                       "%d.%d",
2810                                       PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
2811                 } else
2812 #endif
2813                         eFlags[x++] = '.';
2814                 if (allow_inc_recurse)
2815                         eFlags[x++] = 'i';
2816 #ifdef CAN_SET_SYMLINK_TIMES
2817                 eFlags[x++] = 'L'; /* symlink time-setting support */
2818 #endif
2819 #ifdef ICONV_OPTION
2820                 eFlags[x++] = 's'; /* symlink iconv translation support */
2821 #endif
2822                 eFlags[x++] = 'f'; /* flist I/O-error safety support */
2823                 eFlags[x++] = 'x'; /* xattr hardlink optimization not desired */
2824                 eFlags[x++] = 'C'; /* support checksum seed order fix */
2825                 eFlags[x++] = 'I'; /* support inplace_partial behavior */
2826                 eFlags[x++] = 'v'; /* use varint for flist & compat flags; negotiate checksum */
2827                 eFlags[x++] = 'u'; /* include name of uid 0 & gid 0 in the id map */
2828                 /* NOTE: Avoid using 'V' -- it was the high bit of a write_byte() that became write_varint(). */
2829 #undef eFlags
2830         }
2831
2832         if (x >= (int)sizeof argstr) { /* Not possible... */
2833                 rprintf(FERROR, "argstr overflow in server_options().\n");
2834                 exit_cleanup(RERR_MALLOC);
2835         }
2836
2837         argstr[x] = '\0';
2838
2839         if (x > 1)
2840                 args[ac++] = argstr;
2841
2842 #ifdef ICONV_OPTION
2843         if (iconv_opt) {
2844                 char *set = strchr(iconv_opt, ',');
2845                 if (set)
2846                         set++;
2847                 else
2848                         set = iconv_opt;
2849                 if (asprintf(&arg, "--iconv=%s", set) < 0)
2850                         goto oom;
2851                 args[ac++] = arg;
2852         }
2853 #endif
2854
2855         if (protect_args && !local_server) /* unprotected args stop here */
2856                 args[ac++] = NULL;
2857
2858         if (list_only > 1)
2859                 args[ac++] = "--list-only";
2860
2861         /* This makes sure that the remote rsync can handle deleting with -d
2862          * sans -r because the --no-r option was added at the same time. */
2863         if (xfer_dirs && !recurse && delete_mode && am_sender)
2864                 args[ac++] = "--no-r";
2865
2866         if (do_compression && do_compression_level != CLVL_NOT_SPECIFIED) {
2867                 if (asprintf(&arg, "--compress-level=%d", do_compression_level) < 0)
2868                         goto oom;
2869                 args[ac++] = arg;
2870         }
2871
2872         if (preserve_devices) {
2873                 /* Note: sending "--devices" would not be backward-compatible. */
2874                 if (!preserve_specials)
2875                         args[ac++] = "--no-specials"; /* -D is already set. */
2876         } else if (preserve_specials)
2877                 args[ac++] = "--specials";
2878
2879         /* The server side doesn't use our log-format, but in certain
2880          * circumstances they need to know a little about the option. */
2881         if (stdout_format && am_sender) {
2882                 /* Use --log-format, not --out-format, for compatibility. */
2883                 if (stdout_format_has_i > 1)
2884                         args[ac++] = "--log-format=%i%I";
2885                 else if (stdout_format_has_i)
2886                         args[ac++] = "--log-format=%i";
2887                 else if (stdout_format_has_o_or_i)
2888                         args[ac++] = "--log-format=%o";
2889                 else if (!verbose)
2890                         args[ac++] = "--log-format=X";
2891         }
2892
2893         if (msgs2stderr == 1)
2894                 args[ac++] = "--msgs2stderr";
2895         else if (msgs2stderr == 0)
2896                 args[ac++] = "--no-msgs2stderr";
2897
2898         if (block_size) {
2899                 if (asprintf(&arg, "-B%u", (int)block_size) < 0)
2900                         goto oom;
2901                 args[ac++] = arg;
2902         }
2903
2904         if (io_timeout) {
2905                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
2906                         goto oom;
2907                 args[ac++] = arg;
2908         }
2909
2910         if (bwlimit) {
2911                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
2912                         goto oom;
2913                 args[ac++] = arg;
2914         }
2915
2916         if (backup_dir) {
2917                 args[ac++] = "--backup-dir";
2918                 args[ac++] = backup_dir;
2919         }
2920
2921         /* Only send --suffix if it specifies a non-default value. */
2922         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
2923                 /* We use the following syntax to avoid weirdness with '~'. */
2924                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
2925                         goto oom;
2926                 args[ac++] = arg;
2927         }
2928
2929         if (checksum_choice) {
2930                 if (asprintf(&arg, "--checksum-choice=%s", checksum_choice) < 0)
2931                         goto oom;
2932                 args[ac++] = arg;
2933         }
2934
2935         if (do_compression == CPRES_ZLIBX)
2936                 args[ac++] = "--new-compress";
2937         else if (compress_choice && do_compression == CPRES_ZLIB)
2938                 args[ac++] = "--old-compress";
2939         else if (compress_choice) {
2940                 if (asprintf(&arg, "--compress-choice=%s", compress_choice) < 0)
2941                         goto oom;
2942                 args[ac++] = arg;
2943         }
2944
2945         if (am_sender) {
2946                 if (max_delete > 0) {
2947                         if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
2948                                 goto oom;
2949                         args[ac++] = arg;
2950                 } else if (max_delete == 0)
2951                         args[ac++] = "--max-delete=-1";
2952                 if (min_size >= 0) {
2953                         args[ac++] = "--min-size";
2954                         args[ac++] = min_size_arg;
2955                 }
2956                 if (max_size >= 0) {
2957                         args[ac++] = "--max-size";
2958                         args[ac++] = max_size_arg;
2959                 }
2960                 if (delete_before)
2961                         args[ac++] = "--delete-before";
2962                 else if (delete_during == 2)
2963                         args[ac++] = "--delete-delay";
2964                 else if (delete_during)
2965                         args[ac++] = "--delete-during";
2966                 else if (delete_after)
2967                         args[ac++] = "--delete-after";
2968                 else if (delete_mode && !delete_excluded)
2969                         args[ac++] = "--delete";
2970                 if (delete_excluded)
2971                         args[ac++] = "--delete-excluded";
2972                 if (force_delete)
2973                         args[ac++] = "--force";
2974                 if (write_batch < 0)
2975                         args[ac++] = "--only-write-batch=X";
2976                 if (am_root > 1)
2977                         args[ac++] = "--super";
2978                 if (size_only)
2979                         args[ac++] = "--size-only";
2980                 if (do_stats)
2981                         args[ac++] = "--stats";
2982         } else {
2983                 if (skip_compress) {
2984                         if (asprintf(&arg, "--skip-compress=%s", skip_compress) < 0)
2985                                 goto oom;
2986                         args[ac++] = arg;
2987                 }
2988         }
2989
2990         if (max_alloc_arg && max_alloc != DEFAULT_MAX_ALLOC) {
2991                 args[ac++] = "--max-alloc";
2992                 args[ac++] = max_alloc_arg;
2993         }
2994
2995         /* --delete-missing-args needs the cooperation of both sides, but
2996          * the sender can handle --ignore-missing-args by itself. */
2997         if (missing_args == 2)
2998                 args[ac++] = "--delete-missing-args";
2999         else if (missing_args == 1 && !am_sender)
3000                 args[ac++] = "--ignore-missing-args";
3001
3002         if (modify_window_set && am_sender) {
3003                 char *fmt = modify_window < 0 ? "-@%d" : "--modify-window=%d";
3004                 if (asprintf(&arg, fmt, modify_window) < 0)
3005                         goto oom;
3006                 args[ac++] = arg;
3007         }
3008
3009         if (checksum_seed) {
3010                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
3011                         goto oom;
3012                 args[ac++] = arg;
3013         }
3014
3015         if (partial_dir && am_sender) {
3016                 if (partial_dir != tmp_partialdir) {
3017                         args[ac++] = "--partial-dir";
3018                         args[ac++] = partial_dir;
3019                 }
3020                 if (delay_updates)
3021                         args[ac++] = "--delay-updates";
3022         } else if (keep_partial && am_sender)
3023                 args[ac++] = "--partial";
3024
3025         if (ignore_errors)
3026                 args[ac++] = "--ignore-errors";
3027
3028         if (copy_unsafe_links)
3029                 args[ac++] = "--copy-unsafe-links";
3030
3031         if (safe_symlinks)
3032                 args[ac++] = "--safe-links";
3033
3034         if (numeric_ids)
3035                 args[ac++] = "--numeric-ids";
3036
3037         if (use_qsort)
3038                 args[ac++] = "--use-qsort";
3039
3040         if (am_sender) {
3041                 if (usermap) {
3042                         if (asprintf(&arg, "--usermap=%s", usermap) < 0)
3043                                 goto oom;
3044                         args[ac++] = arg;
3045                 }
3046
3047                 if (groupmap) {
3048                         if (asprintf(&arg, "--groupmap=%s", groupmap) < 0)
3049                                 goto oom;
3050                         args[ac++] = arg;
3051                 }
3052
3053                 if (ignore_existing)
3054                         args[ac++] = "--ignore-existing";
3055
3056                 /* Backward compatibility: send --existing, not --ignore-non-existing. */
3057                 if (ignore_non_existing)
3058                         args[ac++] = "--existing";
3059
3060                 if (tmpdir) {
3061                         args[ac++] = "--temp-dir";
3062                         args[ac++] = tmpdir;
3063                 }
3064
3065                 if (basis_dir[0]) {
3066                         /* the server only needs this option if it is not the sender,
3067                          *   and it may be an older version that doesn't know this
3068                          *   option, so don't send it if client is the sender.
3069                          */
3070                         for (i = 0; i < basis_dir_cnt; i++) {
3071                                 args[ac++] = alt_dest_opt(0);
3072                                 args[ac++] = basis_dir[i];
3073                         }
3074                 }
3075         }
3076
3077         /* What flags do we need to send to the other side? */
3078         where = (am_server ? W_CLI : W_SRV) | (am_sender ? W_REC : W_SND);
3079         arg = make_output_option(info_words, info_levels, where);
3080         if (arg)
3081                 args[ac++] = arg;
3082
3083         if (append_mode) {
3084                 if (append_mode > 1)
3085                         args[ac++] = "--append";
3086                 args[ac++] = "--append";
3087         } else if (inplace)
3088                 args[ac++] = "--inplace";
3089
3090         if (files_from && (!am_sender || filesfrom_host)) {
3091                 if (filesfrom_host) {
3092                         args[ac++] = "--files-from";
3093                         args[ac++] = files_from;
3094                         if (eol_nulls)
3095                                 args[ac++] = "--from0";
3096                 } else {
3097                         args[ac++] = "--files-from=-";
3098                         args[ac++] = "--from0";
3099                 }
3100                 if (!relative_paths)
3101                         args[ac++] = "--no-relative";
3102         }
3103         /* It's OK that this checks the upper-bound of the protocol_version. */
3104         if (relative_paths && !implied_dirs && (!am_sender || protocol_version >= 30))
3105                 args[ac++] = "--no-implied-dirs";
3106
3107         if (write_devices && am_sender)
3108                 args[ac++] = "--write-devices";
3109
3110         if (remove_source_files == 1)
3111                 args[ac++] = "--remove-source-files";
3112         else if (remove_source_files)
3113                 args[ac++] = "--remove-sent-files";
3114
3115         if (preallocate_files && am_sender)
3116                 args[ac++] = "--preallocate";
3117
3118         if (open_noatime && preserve_atimes <= 1)
3119                 args[ac++] = "--open-noatime";
3120
3121         if (mkpath_dest_arg && am_sender)
3122                 args[ac++] = "--mkpath";
3123
3124         if (ac > MAX_SERVER_ARGS) { /* Not possible... */
3125                 rprintf(FERROR, "argc overflow in server_options().\n");
3126                 exit_cleanup(RERR_MALLOC);
3127         }
3128
3129         if (remote_option_cnt) {
3130                 int j;
3131                 if (ac + remote_option_cnt > MAX_SERVER_ARGS) {
3132                         rprintf(FERROR, "too many remote options specified.\n");
3133                         exit_cleanup(RERR_SYNTAX);
3134                 }
3135                 for (j = 1; j <= remote_option_cnt; j++)
3136                         args[ac++] = (char*)remote_options[j];
3137         }
3138
3139         *argc_p = ac;
3140         return;
3141
3142     oom:
3143         out_of_memory("server_options");
3144 }
3145
3146 /* If str points to a valid hostspec, return allocated memory containing the
3147  * [USER@]HOST part of the string, and set the path_start_ptr to the part of
3148  * the string after the host part.  Otherwise, return NULL.  If port_ptr is
3149  * non-NULL, we must be parsing an rsync:// URL hostname, and we will set
3150  * *port_ptr if a port number is found.  Note that IPv6 IPs will have their
3151  * (required for parsing) [ and ] chars elided from the returned string. */
3152 static char *parse_hostspec(char *str, char **path_start_ptr, int *port_ptr)
3153 {
3154         char *s, *host_start = str;
3155         int hostlen = 0, userlen = 0;
3156         char *ret;
3157
3158         for (s = str; ; s++) {
3159                 if (!*s) {
3160                         /* It is only OK if we run out of string with rsync:// */
3161                         if (!port_ptr)
3162                                 return NULL;
3163                         if (!hostlen)
3164                                 hostlen = s - host_start;
3165                         break;
3166                 }
3167                 if (*s == ':' || *s == '/') {
3168                         if (!hostlen)
3169                                 hostlen = s - host_start;
3170                         if (*s++ == '/') {
3171                                 if (!port_ptr)
3172                                         return NULL;
3173                         } else if (port_ptr) {
3174                                 *port_ptr = atoi(s);
3175                                 while (isDigit(s)) s++;
3176                                 if (*s && *s++ != '/')
3177                                         return NULL;
3178                         }
3179                         break;
3180                 }
3181                 if (*s == '@') {
3182                         userlen = s - str + 1;
3183                         host_start = s + 1;
3184                 } else if (*s == '[') {
3185                         if (s != host_start++)
3186                                 return NULL;
3187                         while (*s && *s != ']' && *s != '/') s++; /*SHARED ITERATOR*/
3188                         hostlen = s - host_start;
3189                         if (*s != ']' || (s[1] && s[1] != '/' && s[1] != ':') || !hostlen)
3190                                 return NULL;
3191                 }
3192         }
3193
3194         *path_start_ptr = s;
3195         ret = new_array(char, userlen + hostlen + 1);
3196         if (userlen)
3197                 strlcpy(ret, str, userlen + 1);
3198         strlcpy(ret + userlen, host_start, hostlen + 1);
3199         return ret;
3200 }
3201
3202 /* Look for a HOST specification of the form "HOST:PATH", "HOST::PATH", or
3203  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
3204  * memory with the HOST.  If a daemon-accessing spec was specified, the value
3205  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
3206  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
3207  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
3208  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
3209 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
3210 {
3211         char *path;
3212
3213         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
3214                 *host_ptr = parse_hostspec(s + strlen(URL_PREFIX), &path, port_ptr);
3215                 if (*host_ptr) {
3216                         if (!*port_ptr)
3217                                 *port_ptr = -1; /* -1 indicates they want the default */
3218                         return path;
3219                 }
3220         }
3221
3222         *host_ptr = parse_hostspec(s, &path, NULL);
3223         if (!*host_ptr)
3224                 return NULL;
3225
3226         if (*path == ':') {
3227                 if (port_ptr && !*port_ptr)
3228                         *port_ptr = -1;
3229                 return path + 1;
3230         }
3231         if (port_ptr)
3232                 *port_ptr = 0;
3233
3234         return path;
3235 }