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