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