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) 2002-2011 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 <popt.h>
  25 #include <zlib.h>
  26
  27 extern int module_id;
  28 extern int local_server;
  29 extern int sanitize_paths;
  30 extern int daemon_over_rsh;
  31 extern unsigned int module_dirlen;
  32 extern filter_rule_list filter_list;
  33 extern filter_rule_list daemon_filter_list;
  34
  35 int make_backups = 0;
  36
  37 /**
  38  * If 1, send the whole file as literal data rather than trying to
  39  * create an incremental diff.
  40  *
  41  * If -1, then look at whether we're local or remote and go by that.
  42  *
  43  * @sa disable_deltas_p()
  44  **/
  45 int whole_file = -1;
  46
  47 int append_mode = 0;
  48 int keep_dirlinks = 0;
  49 int copy_dirlinks = 0;
  50 int copy_links = 0;
  51 int preserve_links = 0;
  52 int preserve_hard_links = 0;
  53 int preserve_acls = 0;
  54 int preserve_xattrs = 0;
  55 int preserve_perms = 0;
  56 int preserve_executability = 0;
  57 int preserve_devices = 0;
  58 int preserve_specials = 0;
  59 int preserve_uid = 0;
  60 int preserve_gid = 0;
  61 int preserve_times = 0;
  62 int update_only = 0;
  63 int cvs_exclude = 0;
  64 int dry_run = 0;
  65 int do_xfers = 1;
  66 int ignore_times = 0;
  67 int delete_mode = 0;
  68 int delete_during = 0;
  69 int delete_before = 0;
  70 int delete_after = 0;
  71 int delete_excluded = 0;
  72 int remove_source_files = 0;
  73 int one_file_system = 0;
  74 int protocol_version = PROTOCOL_VERSION;
  75 int sparse_files = 0;
  76 int preallocate_files = 0;
  77 int do_compression = 0;
  78 int def_compress_level = Z_DEFAULT_COMPRESSION;
  79 int am_root = 0; /* 0 = normal, 1 = root, 2 = --super, -1 = --fake-super */
  80 int am_server = 0;
  81 int am_sender = 0;
  82 int am_starting_up = 1;
  83 int relative_paths = -1;
  84 int implied_dirs = 1;
  85 int missing_args = 0; /* 0 = FERROR_XFER, 1 = ignore, 2 = delete */
  86 int numeric_ids = 0;
  87 int msgs2stderr = 0;
  88 int allow_8bit_chars = 0;
  89 int force_delete = 0;
  90 int io_timeout = 0;
  91 int prune_empty_dirs = 0;
  92 int use_qsort = 0;
  93 char *files_from = NULL;
  94 int filesfrom_fd = -1;
  95 char *filesfrom_host = NULL;
  96 int eol_nulls = 0;
  97 int protect_args = -1;
  98 int human_readable = 1;
  99 int recurse = 0;
 100 int allow_inc_recurse = 1;
 101 int xfer_dirs = -1;
 102 int am_daemon = 0;
 103 int connect_timeout = 0;
 104 int keep_partial = 0;
 105 int safe_symlinks = 0;
 106 int copy_unsafe_links = 0;
 107 int munge_symlinks = 0;
 108 int size_only = 0;
 109 int daemon_bwlimit = 0;
 110 int bwlimit = 0;
 111 int fuzzy_basis = 0;
 112 size_t bwlimit_writemax = 0;
 113 int ignore_existing = 0;
 114 int ignore_non_existing = 0;
 115 int need_messages_from_generator = 0;
 116 int max_delete = INT_MIN;
 117 OFF_T max_size = -1;
 118 OFF_T min_size = -1;
 119 int ignore_errors = 0;
 120 int modify_window = 0;
 121 int blocking_io = -1;
 122 int checksum_seed = 0;
 123 int inplace = 0;
 124 int delay_updates = 0;
 125 long block_size = 0; /* "long" because popt can't set an int32. */
 126 char number_separator;
 127 char *skip_compress = NULL;
 128 item_list dparam_list = EMPTY_ITEM_LIST;
 129
 130 /** Network address family. **/
 131 int default_af_hint
 132 #ifdef INET6
 133         = 0;            /* Any protocol */
 134 #else
 135         = AF_INET;      /* Must use IPv4 */
 136 # ifdef AF_INET6
 137 #  undef AF_INET6
 138 # endif
 139 # define AF_INET6 AF_INET /* make -6 option a no-op */
 140 #endif
 141
 142 /** Do not go into the background when run as --daemon.  Good
 143  * for debugging and required for running as a service on W32,
 144  * or under Unix process-monitors. **/
 145 int no_detach
 146 #if defined _WIN32 || defined __WIN32__
 147         = 1;
 148 #else
 149         = 0;
 150 #endif
 151
 152 int write_batch = 0;
 153 int read_batch = 0;
 154 int backup_dir_len = 0;
 155 int backup_suffix_len;
 156 unsigned int backup_dir_remainder;
 157
 158 char *backup_suffix = NULL;
 159 char *tmpdir = NULL;
 160 char *partial_dir = NULL;
 161 char *basis_dir[MAX_BASIS_DIRS+1];
 162 char *config_file = NULL;
 163 char *shell_cmd = NULL;
 164 char *logfile_name = NULL;
 165 char *logfile_format = NULL;
 166 char *stdout_format = NULL;
 167 char *password_file = NULL;
 168 char *rsync_path = RSYNC_PATH;
 169 char *backup_dir = NULL;
 170 char backup_dir_buf[MAXPATHLEN];
 171 char *sockopts = NULL;
 172 char *usermap = NULL;
 173 char *groupmap = NULL;
 174 int rsync_port = 0;
 175 int compare_dest = 0;
 176 int copy_dest = 0;
 177 int link_dest = 0;
 178 int basis_dir_cnt = 0;
 179 char *dest_option = NULL;
 180
 181 static int remote_option_alloc = 0;
 182 int remote_option_cnt = 0;
 183 const char **remote_options = NULL;
 184
 185 int quiet = 0;
 186 int output_motd = 1;
 187 int log_before_transfer = 0;
 188 int stdout_format_has_i = 0;
 189 int stdout_format_has_o_or_i = 0;
 190 int logfile_format_has_i = 0;
 191 int logfile_format_has_o_or_i = 0;
 192 int always_checksum = 0;
 193 int list_only = 0;
 194
 195 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
 196 char *batch_name = NULL;
 197
 198 int need_unsorted_flist = 0;
 199 #ifdef ICONV_OPTION
 200 char *iconv_opt = ICONV_OPTION;
 201 #endif
 202
 203 struct chmod_mode_struct *chmod_modes = NULL;
 204
 205 static const char *debug_verbosity[] = {
 206         /*0*/ NULL,
 207         /*1*/ NULL,
 208         /*2*/ "BIND,CMD,CONNECT,DEL,DELTASUM,DUP,FILTER,FLIST,ICONV",
 209         /*3*/ "ACL,BACKUP,CONNECT2,DELTASUM2,DEL2,EXIT,FILTER2,FLIST2,FUZZY,GENR,OWN,RECV,SEND,TIME",
 210         /*4*/ "CMD2,DELTASUM3,DEL3,EXIT2,FLIST3,ICONV2,OWN2,PROTO,TIME2",
 211         /*5*/ "CHDIR,DELTASUM4,FLIST4,FUZZY2,HASH,HLINK",
 212 };
 213
 214 #define MAX_VERBOSITY ((int)(sizeof debug_verbosity / sizeof debug_verbosity[0]) - 1)
 215
 216 static const char *info_verbosity[1+MAX_VERBOSITY] = {
 217         /*0*/ NULL,
 218         /*1*/ "COPY,DEL,FLIST,MISC,NAME,STATS,SYMSAFE",
 219         /*2*/ "BACKUP,MISC2,MOUNT,NAME2,REMOVE,SKIP",
 220 };
 221
 222 #define MAX_OUT_LEVEL 4 /* The largest N allowed for any flagN word. */
 223
 224 short info_levels[COUNT_INFO], debug_levels[COUNT_DEBUG];
 225
 226 #define DEFAULT_PRIORITY 0      /* Default/implied/--verbose set values. */
 227 #define HELP_PRIORITY 1         /* The help output uses this level. */
 228 #define USER_PRIORITY 2         /* User-specified via --info or --debug */
 229 #define LIMIT_PRIORITY 3        /* Overriding priority when limiting values. */
 230
 231 #define W_CLI (1<<0)    /* client side */
 232 #define W_SRV (1<<1)    /* server side */
 233 #define W_SND (1<<2)    /* sending side */
 234 #define W_REC (1<<3)    /* receiving side */
 235
 236 struct output_struct {
 237         char *name;     /* The name of the info/debug flag. */
 238         char *help;     /* The description of the info/debug flag. */
 239         uchar namelen;  /* The length of the name string. */
 240         uchar flag;     /* The flag's value, for consistency check. */
 241         uchar where;    /* Bits indicating where the flag is used. */
 242         uchar priority; /* See *_PRIORITY defines. */
 243 };
 244
 245 #define INFO_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, INFO_##flag, where, 0 }
 246
 247 static struct output_struct info_words[COUNT_INFO+1] = {
 248         INFO_WORD(BACKUP, W_REC, "Mention files backed up"),
 249         INFO_WORD(COPY, W_REC, "Mention files copied locally on the receiving side"),
 250         INFO_WORD(DEL, W_REC, "Mention deletions on the receiving side"),
 251         INFO_WORD(FLIST, W_CLI, "Mention file-list receiving/sending (levels 1-2)"),
 252         INFO_WORD(MISC, W_SND|W_REC, "Mention miscellaneous information (levels 1-2)"),
 253         INFO_WORD(MOUNT, W_SND|W_REC, "Mention mounts that were found or skipped"),
 254         INFO_WORD(NAME, W_SND|W_REC, "Mention 1) updated file/dir names, 2) unchanged names"),
 255         INFO_WORD(PROGRESS, W_CLI, "Mention 1) per-file progress or 2) total transfer progress"),
 256         INFO_WORD(REMOVE, W_SND, "Mention files removed on the sending side"),
 257         INFO_WORD(SKIP, W_REC, "Mention files that are skipped due to options used"),
 258         INFO_WORD(STATS, W_CLI|W_SRV, "Mention statistics at end of run (levels 1-3)"),
 259         INFO_WORD(SYMSAFE, W_SND|W_REC, "Mention symlinks that are unsafe"),
 260         { NULL, "--info", 0, 0, 0, 0 }
 261 };
 262
 263 #define DEBUG_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, DEBUG_##flag, where, 0 }
 264
 265 static struct output_struct debug_words[COUNT_DEBUG+1] = {
 266         DEBUG_WORD(ACL, W_SND|W_REC, "Debug extra ACL info"),
 267         DEBUG_WORD(BACKUP, W_REC, "Debug backup actions (levels 1-2)"),
 268         DEBUG_WORD(BIND, W_CLI, "Debug socket bind actions"),
 269         DEBUG_WORD(CHDIR, W_CLI|W_SRV, "Debug when the current directory changes"),
 270         DEBUG_WORD(CONNECT, W_CLI, "Debug connection events (levels 1-2)"),
 271         DEBUG_WORD(CMD, W_CLI, "Debug commands+options that are issued (levels 1-2)"),
 272         DEBUG_WORD(DEL, W_REC, "Debug delete actions (levels 1-3)"),
 273         DEBUG_WORD(DELTASUM, W_SND|W_REC, "Debug delta-transfer checksumming (levels 1-4)"),
 274         DEBUG_WORD(DUP, W_REC, "Debug weeding of duplicate names"),
 275         DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-3)"),
 276         DEBUG_WORD(FILTER, W_SND|W_REC, "Debug filter actions (levels 1-2)"),
 277         DEBUG_WORD(FLIST, W_SND|W_REC, "Debug file-list operations (levels 1-4)"),
 278         DEBUG_WORD(FUZZY, W_REC, "Debug fuzzy scoring (levels 1-2)"),
 279         DEBUG_WORD(GENR, W_REC, "Debug generator functions"),
 280         DEBUG_WORD(HASH, W_SND|W_REC, "Debug hashtable code"),
 281         DEBUG_WORD(HLINK, W_SND|W_REC, "Debug hard-link actions (levels 1-3)"),
 282         DEBUG_WORD(ICONV, W_CLI|W_SRV, "Debug iconv character conversions (levels 1-2)"),
 283         DEBUG_WORD(IO, W_CLI|W_SRV, "Debug I/O routines (levels 1-4)"),
 284         DEBUG_WORD(OWN, W_REC, "Debug ownership changes in users & groups (levels 1-2)"),
 285         DEBUG_WORD(PROTO, W_CLI|W_SRV, "Debug protocol information"),
 286         DEBUG_WORD(RECV, W_REC, "Debug receiver functions"),
 287         DEBUG_WORD(SEND, W_SND, "Debug sender functions"),
 288         DEBUG_WORD(TIME, W_REC, "Debug setting of modified times (levels 1-2)"),
 289         { NULL, "--debug", 0, 0, 0, 0 }
 290 };
 291
 292 static int verbose = 0;
 293 static int do_stats = 0;
 294 static int do_progress = 0;
 295 static int daemon_opt;   /* sets am_daemon after option error-reporting */
 296 static int omit_dir_times = 0;
 297 static int omit_link_times = 0;
 298 static int F_option_cnt = 0;
 299 static int modify_window_set;
 300 static int itemize_changes = 0;
 301 static int refused_delete, refused_archive_part, refused_compress;
 302 static int refused_partial, refused_progress, refused_delete_before;
 303 static int refused_delete_during;
 304 static int refused_inplace, refused_no_iconv;
 305 static BOOL usermap_via_chown, groupmap_via_chown;
 306 static char *outbuf_mode;
 307 static char *bwlimit_arg, *max_size_arg, *min_size_arg;
 308 static char tmp_partialdir[] = ".~tmp~";
 309
 310 /** Local address to bind.  As a character string because it's
 311  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
 312  * address, or a hostname. **/
 313 char *bind_address;
 314
 315 static void output_item_help(struct output_struct *words);
 316
 317 /* This constructs a string that represents all the options set for either
 318  * the --info or --debug setting, skipping any implied options (by -v, etc.).
 319  * This is used both when conveying the user's options to the server, and
 320  * when the help output wants to tell the user what options are implied. */
 321 static char *make_output_option(struct output_struct *words, short *levels, uchar where)
 322 {
 323         char *str = words == info_words ? "--info=" : "--debug=";
 324         int j, counts[MAX_OUT_LEVEL+1], pos, skipped = 0, len = 0, max = 0, lev = 0;
 325         int word_count = words == info_words ? COUNT_INFO : COUNT_DEBUG;
 326         char *buf;
 327
 328         memset(counts, 0, sizeof counts);
 329
 330         for (j = 0; words[j].name; j++) {
 331                 if (words[j].flag != j) {
 332                         rprintf(FERROR, "rsync: internal error on %s%s: %d != %d\n",
 333                                 words == info_words ? "INFO_" : "DEBUG_",
 334                                 words[j].name, words[j].flag, j);
 335                         exit_cleanup(RERR_UNSUPPORTED);
 336                 }
 337                 if (!(words[j].where & where))
 338                         continue;
 339                 if (words[j].priority == DEFAULT_PRIORITY) {
 340                         /* Implied items don't need to be mentioned. */
 341                         skipped++;
 342                         continue;
 343                 }
 344                 len += len ? 1 : strlen(str);
 345                 len += strlen(words[j].name);
 346                 len += levels[j] == 1 ? 0 : 1;
 347
 348                 if (words[j].priority == HELP_PRIORITY)
 349                         continue; /* no abbreviating for help */
 350
 351                 assert(levels[j] <= MAX_OUT_LEVEL);
 352                 if (++counts[levels[j]] > max) {
 353                         /* Determine which level has the most items. */
 354                         lev = levels[j];
 355                         max = counts[lev];
 356                 }
 357         }
 358
 359         /* Sanity check the COUNT_* define against the length of the table. */
 360         if (j != word_count) {
 361                 rprintf(FERROR, "rsync: internal error: %s is wrong! (%d != %d)\n",
 362                         words == info_words ? "COUNT_INFO" : "COUNT_DEBUG",
 363                         j, word_count);
 364                 exit_cleanup(RERR_UNSUPPORTED);
 365         }
 366
 367         if (!len)
 368                 return NULL;
 369
 370         len++;
 371         if (!(buf = new_array(char, len)))
 372                 out_of_memory("make_output_option");
 373         pos = 0;
 374
 375         if (skipped || max < 5)
 376                 lev = -1;
 377         else {
 378                 if (lev == 0)
 379                         pos += snprintf(buf, len, "%sNONE", str);
 380                 else if (lev == 1)
 381                         pos += snprintf(buf, len, "%sALL", str);
 382                 else
 383                         pos += snprintf(buf, len, "%sALL%d", str, lev);
 384         }
 385
 386         for (j = 0; words[j].name && pos < len; j++) {
 387                 if (words[j].priority == DEFAULT_PRIORITY || levels[j] == lev || !(words[j].where & where))
 388                         continue;
 389                 if (pos)
 390                         buf[pos++] = ',';
 391                 else
 392                         pos += strlcpy(buf+pos, str, len-pos);
 393                 if (pos < len)
 394                         pos += strlcpy(buf+pos, words[j].name, len-pos);
 395                 /* Level 1 is implied by the name alone. */
 396                 if (levels[j] != 1 && pos < len)
 397                         buf[pos++] = '0' + levels[j];
 398         }
 399
 400         buf[pos] = '\0';
 401
 402         return buf;
 403 }
 404
 405 static void parse_output_words(struct output_struct *words, short *levels,
 406                                const char *str, uchar priority)
 407 {
 408         const char *s;
 409         int j, len, lev;
 410
 411         if (!str)
 412                 return;
 413
 414         while (*str) {
 415                 if ((s = strchr(str, ',')) != NULL)
 416                         len = s++ - str;
 417                 else
 418                         len = strlen(str);
 419                 while (len && isDigit(str+len-1))
 420                         len--;
 421                 lev = isDigit(str+len) ? atoi(str+len) : 1;
 422                 if (lev > MAX_OUT_LEVEL)
 423                         lev = MAX_OUT_LEVEL;
 424                 if (len == 4 && strncasecmp(str, "help", 4) == 0) {
 425                         output_item_help(words);
 426                         exit_cleanup(0);
 427                 }
 428                 if (len == 4 && strncasecmp(str, "none", 4) == 0)
 429                         len = lev = 0;
 430                 else if (len == 3 && strncasecmp(str, "all", 3) == 0)
 431                         len = 0;
 432                 for (j = 0; words[j].name; j++) {
 433                         if (!len
 434                          || (len == words[j].namelen && strncasecmp(str, words[j].name, len) == 0)) {
 435                                 if (priority >= words[j].priority) {
 436                                         words[j].priority = priority;
 437                                         levels[j] = lev;
 438                                 }
 439                                 if (len)
 440                                         break;
 441                         }
 442                 }
 443                 if (len && !words[j].name) {
 444                         rprintf(FERROR, "Unknown %s item: \"%.*s\"\n",
 445                                 words[j].help, len, str);
 446                         exit_cleanup(RERR_SYNTAX);
 447                 }
 448                 if (!s)
 449                         break;
 450                 str = s;
 451         }
 452 }
 453
 454 /* Tell the user what all the info or debug flags mean. */
 455 static void output_item_help(struct output_struct *words)
 456 {
 457         short *levels = words == info_words ? info_levels : debug_levels;
 458         const char **verbosity = words == info_words ? info_verbosity : debug_verbosity;
 459         char buf[128], *opt, *fmt = "%-10s %s\n";
 460         int j;
 461
 462         reset_output_levels();
 463
 464         rprintf(FINFO, "Use OPT or OPT1 for level 1 output, OPT2 for level 2, etc.; OPT0 silences.\n");
 465         rprintf(FINFO, "\n");
 466         for (j = 0; words[j].name; j++)
 467                 rprintf(FINFO, fmt, words[j].name, words[j].help);
 468         rprintf(FINFO, "\n");
 469
 470         snprintf(buf, sizeof buf, "Set all %s options (e.g. all%d)",
 471                  words[j].help, MAX_OUT_LEVEL);
 472         rprintf(FINFO, fmt, "ALL", buf);
 473
 474         snprintf(buf, sizeof buf, "Silence all %s options (same as all0)",
 475                  words[j].help);
 476         rprintf(FINFO, fmt, "NONE", buf);
 477
 478         rprintf(FINFO, fmt, "HELP", "Output this help message");
 479         rprintf(FINFO, "\n");
 480         rprintf(FINFO, "Options added for each increase in verbose level:\n");
 481
 482         for (j = 1; j <= MAX_VERBOSITY; j++) {
 483                 parse_output_words(words, levels, verbosity[j], HELP_PRIORITY);
 484                 opt = make_output_option(words, levels, W_CLI|W_SRV|W_SND|W_REC);
 485                 if (opt) {
 486                         rprintf(FINFO, "%d) %s\n", j, strchr(opt, '=')+1);
 487                         free(opt);
 488                 }
 489                 reset_output_levels();
 490         }
 491 }
 492
 493 /* The --verbose option now sets info+debug flags. */
 494 static void set_output_verbosity(int level, uchar priority)
 495 {
 496         int j;
 497
 498         if (level > MAX_VERBOSITY)
 499                 level = MAX_VERBOSITY;
 500
 501         for (j = 1; j <= level; j++) {
 502                 parse_output_words(info_words, info_levels, info_verbosity[j], priority);
 503                 parse_output_words(debug_words, debug_levels, debug_verbosity[j], priority);
 504         }
 505 }
 506
 507 /* Limit the info+debug flag levels given a verbose-option level limit. */
 508 void limit_output_verbosity(int level)
 509 {
 510         short info_limits[COUNT_INFO], debug_limits[COUNT_DEBUG];
 511         int j;
 512
 513         if (level > MAX_VERBOSITY)
 514                 return;
 515
 516         memset(info_limits, 0, sizeof info_limits);
 517         memset(debug_limits, 0, sizeof debug_limits);
 518
 519         /* Compute the level limits in the above arrays. */
 520         for (j = 1; j <= level; j++) {
 521                 parse_output_words(info_words, info_limits, info_verbosity[j], LIMIT_PRIORITY);
 522                 parse_output_words(debug_words, debug_limits, debug_verbosity[j], LIMIT_PRIORITY);
 523         }
 524
 525         for (j = 0; j < COUNT_INFO; j++) {
 526                 if (info_levels[j] > info_limits[j])
 527                         info_levels[j] = info_limits[j];
 528         }
 529
 530         for (j = 0; j < COUNT_DEBUG; j++) {
 531                 if (debug_levels[j] > debug_limits[j])
 532                         debug_levels[j] = debug_limits[j];
 533         }
 534 }
 535
 536 void reset_output_levels(void)
 537 {
 538         int j;
 539
 540         memset(info_levels, 0, sizeof info_levels);
 541         memset(debug_levels, 0, sizeof debug_levels);
 542
 543         for (j = 0; j < COUNT_INFO; j++)
 544                 info_words[j].priority = DEFAULT_PRIORITY;
 545
 546         for (j = 0; j < COUNT_DEBUG; j++)
 547                 debug_words[j].priority = DEFAULT_PRIORITY;
 548 }
 549
 550 void negate_output_levels(void)
 551 {
 552         int j;
 553
 554         for (j = 0; j < COUNT_INFO; j++)
 555                 info_levels[j] *= -1;
 556
 557         for (j = 0; j < COUNT_DEBUG; j++)
 558                 debug_levels[j] *= -1;
 559 }
 560
 561 static void print_rsync_version(enum logcode f)
 562 {
 563         char *subprotocol = "";
 564         char const *got_socketpair = "no ";
 565         char const *have_inplace = "no ";
 566         char const *hardlinks = "no ";
 567         char const *prealloc = "no ";
 568         char const *symtimes = "no ";
 569         char const *acls = "no ";
 570         char const *xattrs = "no ";
 571         char const *links = "no ";
 572         char const *iconv = "no ";
 573         char const *ipv6 = "no ";
 574         STRUCT_STAT *dumstat;
 575
 576 #if SUBPROTOCOL_VERSION != 0
 577         if (asprintf(&subprotocol, ".PR%d", SUBPROTOCOL_VERSION) < 0)
 578                 out_of_memory("print_rsync_version");
 579 #endif
 580 #ifdef HAVE_SOCKETPAIR
 581         got_socketpair = "";
 582 #endif
 583 #ifdef HAVE_FTRUNCATE
 584         have_inplace = "";
 585 #endif
 586 #ifdef SUPPORT_HARD_LINKS
 587         hardlinks = "";
 588 #endif
 589 #ifdef SUPPORT_PREALLOCATION
 590         prealloc = "";
 591 #endif
 592 #ifdef SUPPORT_ACLS
 593         acls = "";
 594 #endif
 595 #ifdef SUPPORT_XATTRS
 596         xattrs = "";
 597 #endif
 598 #ifdef SUPPORT_LINKS
 599         links = "";
 600 #endif
 601 #ifdef INET6
 602         ipv6 = "";
 603 #endif
 604 #ifdef ICONV_OPTION
 605         iconv = "";
 606 #endif
 607 #ifdef CAN_SET_SYMLINK_TIMES
 608         symtimes = "";
 609 #endif
 610
 611         rprintf(f, "%s  version %s  protocol version %d%s\n",
 612                 RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION, subprotocol);
 613         rprintf(f, "Copyright (C) 1996-2011 by Andrew Tridgell, Wayne Davison, and others.\n");
 614         rprintf(f, "Web site: http://rsync.samba.org/\n");
 615         rprintf(f, "Capabilities:\n");
 616         rprintf(f, "    %d-bit files, %d-bit inums, %d-bit timestamps, %d-bit long ints,\n",
 617                 (int)(sizeof (OFF_T) * 8),
 618                 (int)(sizeof dumstat->st_ino * 8), /* Don't check ino_t! */
 619                 (int)(sizeof (time_t) * 8),
 620                 (int)(sizeof (int64) * 8));
 621         rprintf(f, "    %ssocketpairs, %shardlinks, %ssymlinks, %sIPv6, batchfiles, %sinplace,\n",
 622                 got_socketpair, hardlinks, links, ipv6, have_inplace);
 623         rprintf(f, "    %sappend, %sACLs, %sxattrs, %siconv, %ssymtimes, %sprealloc\n",
 624                 have_inplace, acls, xattrs, iconv, symtimes, prealloc);
 625
 626 #ifdef MAINTAINER_MODE
 627         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
 628 #endif
 629
 630 #if SIZEOF_INT64 < 8
 631         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
 632 #endif
 633         if (sizeof (int64) != SIZEOF_INT64) {
 634                 rprintf(f,
 635                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
 636                         (int) SIZEOF_INT64, (int) sizeof (int64));
 637         }
 638
 639         rprintf(f,"\n");
 640         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
 641         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
 642         rprintf(f,"General Public Licence for details.\n");
 643 }
 644
 645
 646 void usage(enum logcode F)
 647 {
 648   print_rsync_version(F);
 649
 650   rprintf(F,"\n");
 651   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
 652   rprintf(F,"via a fast differencing algorithm.\n");
 653
 654   rprintf(F,"\n");
 655   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
 656   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
 657   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
 658   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
 659   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
 660   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
 661   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
 662   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
 663   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
 664   rprintf(F,"\n");
 665   rprintf(F,"Options\n");
 666   rprintf(F," -v, --verbose               increase verbosity\n");
 667   rprintf(F,"     --info=FLAGS            fine-grained informational verbosity\n");
 668   rprintf(F,"     --debug=FLAGS           fine-grained debug verbosity\n");
 669   rprintf(F,"     --msgs2stderr           special output handling for debugging\n");
 670   rprintf(F," -q, --quiet                 suppress non-error messages\n");
 671   rprintf(F,"     --no-motd               suppress daemon-mode MOTD (see manpage caveat)\n");
 672   rprintf(F," -c, --checksum              skip based on checksum, not mod-time & size\n");
 673   rprintf(F," -a, --archive               archive mode; equals -rlptgoD (no -H,-A,-X)\n");
 674   rprintf(F,"     --no-OPTION             turn off an implied OPTION (e.g. --no-D)\n");
 675   rprintf(F," -r, --recursive             recurse into directories\n");
 676   rprintf(F," -R, --relative              use relative path names\n");
 677   rprintf(F,"     --no-implied-dirs       don't send implied dirs with --relative\n");
 678   rprintf(F," -b, --backup                make backups (see --suffix & --backup-dir)\n");
 679   rprintf(F,"     --backup-dir=DIR        make backups into hierarchy based in DIR\n");
 680   rprintf(F,"     --suffix=SUFFIX         set backup suffix (default %s w/o --backup-dir)\n",BACKUP_SUFFIX);
 681   rprintf(F," -u, --update                skip files that are newer on the receiver\n");
 682   rprintf(F,"     --inplace               update destination files in-place (SEE MAN PAGE)\n");
 683   rprintf(F,"     --append                append data onto shorter files\n");
 684   rprintf(F,"     --append-verify         like --append, but with old data in file checksum\n");
 685   rprintf(F," -d, --dirs                  transfer directories without recursing\n");
 686   rprintf(F," -l, --links                 copy symlinks as symlinks\n");
 687   rprintf(F," -L, --copy-links            transform symlink into referent file/dir\n");
 688   rprintf(F,"     --copy-unsafe-links     only \"unsafe\" symlinks are transformed\n");
 689   rprintf(F,"     --safe-links            ignore symlinks that point outside the source tree\n");
 690   rprintf(F,"     --munge-links           munge symlinks to make them safer (but unusable)\n");
 691   rprintf(F," -k, --copy-dirlinks         transform symlink to a dir into referent dir\n");
 692   rprintf(F," -K, --keep-dirlinks         treat symlinked dir on receiver as dir\n");
 693   rprintf(F," -H, --hard-links            preserve hard links\n");
 694   rprintf(F," -p, --perms                 preserve permissions\n");
 695   rprintf(F," -E, --executability         preserve the file's executability\n");
 696   rprintf(F,"     --chmod=CHMOD           affect file and/or directory permissions\n");
 697 #ifdef SUPPORT_ACLS
 698   rprintf(F," -A, --acls                  preserve ACLs (implies --perms)\n");
 699 #endif
 700 #ifdef SUPPORT_XATTRS
 701   rprintf(F," -X, --xattrs                preserve extended attributes\n");
 702 #endif
 703   rprintf(F," -o, --owner                 preserve owner (super-user only)\n");
 704   rprintf(F," -g, --group                 preserve group\n");
 705   rprintf(F,"     --devices               preserve device files (super-user only)\n");
 706   rprintf(F,"     --specials              preserve special files\n");
 707   rprintf(F," -D                          same as --devices --specials\n");
 708   rprintf(F," -t, --times                 preserve modification times\n");
 709   rprintf(F," -O, --omit-dir-times        omit directories from --times\n");
 710   rprintf(F," -J, --omit-link-times       omit symlinks from --times\n");
 711   rprintf(F,"     --super                 receiver attempts super-user activities\n");
 712 #ifdef SUPPORT_XATTRS
 713   rprintf(F,"     --fake-super            store/recover privileged attrs using xattrs\n");
 714 #endif
 715   rprintf(F," -S, --sparse                handle sparse files efficiently\n");
 716 #ifdef SUPPORT_PREALLOCATION
 717   rprintf(F,"     --preallocate           allocate dest files before writing them\n");
 718 #else
 719   rprintf(F,"     --preallocate           pre-allocate dest files on remote receiver\n");
 720 #endif
 721   rprintf(F," -n, --dry-run               perform a trial run with no changes made\n");
 722   rprintf(F," -W, --whole-file            copy files whole (without delta-xfer algorithm)\n");
 723   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
 724   rprintf(F," -B, --block-size=SIZE       force a fixed checksum block-size\n");
 725   rprintf(F," -e, --rsh=COMMAND           specify the remote shell to use\n");
 726   rprintf(F,"     --rsync-path=PROGRAM    specify the rsync to run on the remote machine\n");
 727   rprintf(F,"     --existing              skip creating new files on receiver\n");
 728   rprintf(F,"     --ignore-existing       skip updating files that already exist on receiver\n");
 729   rprintf(F,"     --remove-source-files   sender removes synchronized files (non-dirs)\n");
 730   rprintf(F,"     --del                   an alias for --delete-during\n");
 731   rprintf(F,"     --delete                delete extraneous files from destination dirs\n");
 732   rprintf(F,"     --delete-before         receiver deletes before transfer, not during\n");
 733   rprintf(F,"     --delete-during         receiver deletes during the transfer\n");
 734   rprintf(F,"     --delete-delay          find deletions during, delete after\n");
 735   rprintf(F,"     --delete-after          receiver deletes after transfer, not during\n");
 736   rprintf(F,"     --delete-excluded       also delete excluded files from destination dirs\n");
 737   rprintf(F,"     --ignore-missing-args   ignore missing source args without error\n");
 738   rprintf(F,"     --delete-missing-args   delete missing source args from destination\n");
 739   rprintf(F,"     --ignore-errors         delete even if there are I/O errors\n");
 740   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
 741   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
 742   rprintf(F,"     --max-size=SIZE         don't transfer any file larger than SIZE\n");
 743   rprintf(F,"     --min-size=SIZE         don't transfer any file smaller than SIZE\n");
 744   rprintf(F,"     --partial               keep partially transferred files\n");
 745   rprintf(F,"     --partial-dir=DIR       put a partially transferred file into DIR\n");
 746   rprintf(F,"     --delay-updates         put all updated files into place at transfer's end\n");
 747   rprintf(F," -m, --prune-empty-dirs      prune empty directory chains from the file-list\n");
 748   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
 749   rprintf(F,"     --usermap=STRING        custom username mapping\n");
 750   rprintf(F,"     --groupmap=STRING       custom groupname mapping\n");
 751   rprintf(F,"     --chown=USER:GROUP      simple username/groupname mapping\n");
 752   rprintf(F,"     --timeout=SECONDS       set I/O timeout in seconds\n");
 753   rprintf(F,"     --contimeout=SECONDS    set daemon connection timeout in seconds\n");
 754   rprintf(F," -I, --ignore-times          don't skip files that match in size and mod-time\n");
 755   rprintf(F," -M, --remote-option=OPTION  send OPTION to the remote side only\n");
 756   rprintf(F,"     --size-only             skip files that match in size\n");
 757   rprintf(F,"     --modify-window=NUM     compare mod-times with reduced accuracy\n");
 758   rprintf(F," -T, --temp-dir=DIR          create temporary files in directory DIR\n");
 759   rprintf(F," -y, --fuzzy                 find similar file for basis if no dest file\n");
 760   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
 761   rprintf(F,"     --copy-dest=DIR         ... and include copies of unchanged files\n");
 762   rprintf(F,"     --link-dest=DIR         hardlink to files in DIR when unchanged\n");
 763   rprintf(F," -z, --compress              compress file data during the transfer\n");
 764   rprintf(F,"     --compress-level=NUM    explicitly set compression level\n");
 765   rprintf(F,"     --skip-compress=LIST    skip compressing files with a suffix in LIST\n");
 766   rprintf(F," -C, --cvs-exclude           auto-ignore files the same way CVS does\n");
 767   rprintf(F," -f, --filter=RULE           add a file-filtering RULE\n");
 768   rprintf(F," -F                          same as --filter='dir-merge /.rsync-filter'\n");
 769   rprintf(F,"                             repeated: --filter='- .rsync-filter'\n");
 770   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
 771   rprintf(F,"     --exclude-from=FILE     read exclude patterns from FILE\n");
 772   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
 773   rprintf(F,"     --include-from=FILE     read include patterns from FILE\n");
 774   rprintf(F,"     --files-from=FILE       read list of source-file names from FILE\n");
 775   rprintf(F," -0, --from0                 all *-from/filter files are delimited by 0s\n");
 776   rprintf(F," -s, --protect-args          no space-splitting; only wildcard special-chars\n");
 777   rprintf(F,"     --address=ADDRESS       bind address for outgoing socket to daemon\n");
 778   rprintf(F,"     --port=PORT             specify double-colon alternate port number\n");
 779   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
 780   rprintf(F,"     --blocking-io           use blocking I/O for the remote shell\n");
 781   rprintf(F,"     --stats                 give some file-transfer stats\n");
 782   rprintf(F," -8, --8-bit-output          leave high-bit chars unescaped in output\n");
 783   rprintf(F," -h, --human-readable        output numbers in a human-readable format\n");
 784   rprintf(F,"     --progress              show progress during transfer\n");
 785   rprintf(F," -P                          same as --partial --progress\n");
 786   rprintf(F," -i, --itemize-changes       output a change-summary for all updates\n");
 787   rprintf(F,"     --out-format=FORMAT     output updates using the specified FORMAT\n");
 788   rprintf(F,"     --log-file=FILE         log what we're doing to the specified FILE\n");
 789   rprintf(F,"     --log-file-format=FMT   log updates using the specified FMT\n");
 790   rprintf(F,"     --password-file=FILE    read daemon-access password from FILE\n");
 791   rprintf(F,"     --list-only             list the files instead of copying them\n");
 792   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
 793 #ifdef HAVE_SETVBUF
 794   rprintf(F,"     --outbuf=N|L|B          set output buffering to None, Line, or Block\n");
 795 #endif
 796   rprintf(F,"     --write-batch=FILE      write a batched update to FILE\n");
 797   rprintf(F,"     --only-write-batch=FILE like --write-batch but w/o updating destination\n");
 798   rprintf(F,"     --read-batch=FILE       read a batched update from FILE\n");
 799   rprintf(F,"     --protocol=NUM          force an older protocol version to be used\n");
 800 #ifdef ICONV_OPTION
 801   rprintf(F,"     --iconv=CONVERT_SPEC    request charset conversion of filenames\n");
 802 #endif
 803   rprintf(F," -4, --ipv4                  prefer IPv4\n");
 804   rprintf(F," -6, --ipv6                  prefer IPv6\n");
 805   rprintf(F,"     --version               print version number\n");
 806   rprintf(F,"(-h) --help                  show this help (-h is --help only if used alone)\n");
 807
 808   rprintf(F,"\n");
 809   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
 810   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
 811   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
 812 }
 813
 814 enum {OPT_VERSION = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
 815       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
 816       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
 817       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
 818       OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, OPT_INFO, OPT_DEBUG,
 819       OPT_USERMAP, OPT_GROUPMAP, OPT_CHOWN, OPT_BWLIMIT,
 820       OPT_SERVER, OPT_REFUSED_BASE = 9000};
 821
 822 static struct poptOption long_options[] = {
 823   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 824   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
 825   {"version",          0,  POPT_ARG_NONE,   0, OPT_VERSION, 0, 0},
 826   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
 827   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 828   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 829   {"info",             0,  POPT_ARG_STRING, 0, OPT_INFO, 0, 0 },
 830   {"debug",            0,  POPT_ARG_STRING, 0, OPT_DEBUG, 0, 0 },
 831   {"msgs2stderr",      0,  POPT_ARG_NONE,   &msgs2stderr, 0, 0, 0 },
 832   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
 833   {"motd",             0,  POPT_ARG_VAL,    &output_motd, 1, 0, 0 },
 834   {"no-motd",          0,  POPT_ARG_VAL,    &output_motd, 0, 0, 0 },
 835   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
 836   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
 837   {"no-human-readable",0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 838   {"no-h",             0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 839   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
 840   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
 841   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
 842   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 843   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 844   {"inc-recursive",    0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 845   {"no-inc-recursive", 0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 846   {"i-r",              0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 847   {"no-i-r",           0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 848   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
 849   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 850   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 851   {"old-dirs",         0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 852   {"old-d",            0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 853   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
 854   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 855   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 856   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
 857   {"acls",            'A', POPT_ARG_NONE,   0, 'A', 0, 0 },
 858   {"no-acls",          0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 859   {"no-A",             0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 860   {"xattrs",          'X', POPT_ARG_NONE,   0, 'X', 0, 0 },
 861   {"no-xattrs",        0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 862   {"no-X",             0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 863   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
 864   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 865   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 866   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 1, 0, 0 },
 867   {"no-omit-dir-times",0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 868   {"no-O",             0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 869   {"omit-link-times", 'J', POPT_ARG_VAL,    &omit_link_times, 1, 0, 0 },
 870   {"no-omit-link-times",0, POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 871   {"no-J",             0,  POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 872   {"modify-window",    0,  POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
 873   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
 874   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
 875   {"fake-super",       0,  POPT_ARG_VAL,    &am_root, -1, 0, 0 },
 876   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
 877   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 878   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 879   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
 880   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 881   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 882   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
 883   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
 884   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
 885   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
 886   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
 887   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
 888   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
 889   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 890   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 891   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
 892   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
 893   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
 894   {"munge-links",      0,  POPT_ARG_VAL,    &munge_symlinks, 1, 0, 0 },
 895   {"no-munge-links",   0,  POPT_ARG_VAL,    &munge_symlinks, 0, 0, 0 },
 896   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
 897   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
 898   {"hard-links",      'H', POPT_ARG_NONE,   0, 'H', 0, 0 },
 899   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 900   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 901   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
 902   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 903   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 904   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 905   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 906   {"i-d",              0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 907   {"no-i-d",           0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 908   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
 909   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
 910   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
 911   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
 912   {"no-one-file-system",0, POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 913   {"no-x",             0,  POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 914   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
 915   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 916   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 917   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
 918   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
 919   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
 920   {"sparse",          'S', POPT_ARG_VAL,    &sparse_files, 1, 0, 0 },
 921   {"no-sparse",        0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 922   {"no-S",             0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 923   {"preallocate",      0,  POPT_ARG_NONE,   &preallocate_files, 0, 0, 0},
 924   {"inplace",          0,  POPT_ARG_VAL,    &inplace, 1, 0, 0 },
 925   {"no-inplace",       0,  POPT_ARG_VAL,    &inplace, 0, 0, 0 },
 926   {"append",           0,  POPT_ARG_NONE,   0, OPT_APPEND, 0, 0 },
 927   {"append-verify",    0,  POPT_ARG_VAL,    &append_mode, 2, 0, 0 },
 928   {"no-append",        0,  POPT_ARG_VAL,    &append_mode, 0, 0, 0 },
 929   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
 930   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
 931   {"delete-before",    0,  POPT_ARG_NONE,   &delete_before, 0, 0, 0 },
 932   {"delete-during",    0,  POPT_ARG_VAL,    &delete_during, 1, 0, 0 },
 933   {"delete-delay",     0,  POPT_ARG_VAL,    &delete_during, 2, 0, 0 },
 934   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
 935   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
 936   {"delete-missing-args",0,POPT_BIT_SET,    &missing_args, 2, 0, 0 },
 937   {"ignore-missing-args",0,POPT_BIT_SET,    &missing_args, 1, 0, 0 },
 938   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_source_files, 2, 0, 0 }, /* deprecated */
 939   {"remove-source-files",0,POPT_ARG_VAL,    &remove_source_files, 1, 0, 0 },
 940   {"force",            0,  POPT_ARG_VAL,    &force_delete, 1, 0, 0 },
 941   {"no-force",         0,  POPT_ARG_VAL,    &force_delete, 0, 0, 0 },
 942   {"ignore-errors",    0,  POPT_ARG_VAL,    &ignore_errors, 1, 0, 0 },
 943   {"no-ignore-errors", 0,  POPT_ARG_VAL,    &ignore_errors, 0, 0, 0 },
 944   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
 945   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
 946   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
 947   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
 948   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
 949   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
 950   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
 951   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
 952   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
 953   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 954   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 955   {"checksum",        'c', POPT_ARG_VAL,    &always_checksum, 1, 0, 0 },
 956   {"no-checksum",      0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 957   {"no-c",             0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 958   {"block-size",      'B', POPT_ARG_LONG,   &block_size, 0, 0, 0 },
 959   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
 960   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
 961   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
 962   {"fuzzy",           'y', POPT_ARG_NONE,   0, 'y', 0, 0 },
 963   {"no-fuzzy",         0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 964   {"no-y",             0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 965   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
 966   {"no-compress",      0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
 967   {"no-z",             0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
 968   {"skip-compress",    0,  POPT_ARG_STRING, &skip_compress, 0, 0, 0 },
 969   {"compress-level",   0,  POPT_ARG_INT,    &def_compress_level, 'z', 0, 0 },
 970   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
 971   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
 972   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
 973   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
 974   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
 975   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
 976   {"delay-updates",    0,  POPT_ARG_VAL,    &delay_updates, 1, 0, 0 },
 977   {"no-delay-updates", 0,  POPT_ARG_VAL,    &delay_updates, 0, 0, 0 },
 978   {"prune-empty-dirs",'m', POPT_ARG_VAL,    &prune_empty_dirs, 1, 0, 0 },
 979   {"no-prune-empty-dirs",0,POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
 980   {"no-m",             0,  POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
 981   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
 982   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
 983   {"out-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 },
 984   {"log-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 }, /* DEPRECATED */
 985   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
 986   {"no-itemize-changes",0, POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
 987   {"no-i",             0,  POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
 988   {"bwlimit",          0,  POPT_ARG_STRING, &bwlimit_arg, OPT_BWLIMIT, 0, 0 },
 989   {"no-bwlimit",       0,  POPT_ARG_VAL,    &bwlimit, 0, 0, 0 },
 990   {"backup",          'b', POPT_ARG_VAL,    &make_backups, 1, 0, 0 },
 991   {"no-backup",        0,  POPT_ARG_VAL,    &make_backups, 0, 0, 0 },
 992   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
 993   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
 994   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
 995   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
 996   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
 997   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
 998   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
 999   {"from0",           '0', POPT_ARG_VAL,    &eol_nulls, 1, 0, 0},
1000   {"no-from0",         0,  POPT_ARG_VAL,    &eol_nulls, 0, 0, 0},
1001   {"protect-args",    's', POPT_ARG_VAL,    &protect_args, 1, 0, 0},
1002   {"no-protect-args",  0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1003   {"no-s",             0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1004   {"numeric-ids",      0,  POPT_ARG_VAL,    &numeric_ids, 1, 0, 0 },
1005   {"no-numeric-ids",   0,  POPT_ARG_VAL,    &numeric_ids, 0, 0, 0 },
1006   {"usermap",          0,  POPT_ARG_STRING, 0, OPT_USERMAP, 0, 0 },
1007   {"groupmap",         0,  POPT_ARG_STRING, 0, OPT_GROUPMAP, 0, 0 },
1008   {"chown",            0,  POPT_ARG_STRING, 0, OPT_CHOWN, 0, 0 },
1009   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
1010   {"no-timeout",       0,  POPT_ARG_VAL,    &io_timeout, 0, 0, 0 },
1011   {"contimeout",       0,  POPT_ARG_INT,    &connect_timeout, 0, 0, 0 },
1012   {"no-contimeout",    0,  POPT_ARG_VAL,    &connect_timeout, 0, 0, 0 },
1013   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
1014   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
1015   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1016 #ifdef ICONV_OPTION
1017   {"iconv",            0,  POPT_ARG_STRING, &iconv_opt, 0, 0, 0 },
1018   {"no-iconv",         0,  POPT_ARG_NONE,   0, OPT_NO_ICONV, 0, 0 },
1019 #endif
1020   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1021   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1022   {"8-bit-output",    '8', POPT_ARG_VAL,    &allow_8bit_chars, 1, 0, 0 },
1023   {"no-8-bit-output",  0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1024   {"no-8",             0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1025   {"qsort",            0,  POPT_ARG_NONE,   &use_qsort, 0, 0, 0 },
1026   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1027   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1028   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1029   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
1030   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
1031   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
1032 #ifdef HAVE_SETVBUF
1033   {"outbuf",           0,  POPT_ARG_STRING, &outbuf_mode, 0, 0, 0 },
1034 #endif
1035   {"remote-option",   'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1036   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1037   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
1038   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
1039   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
1040   /* All the following options switch us into daemon-mode option-parsing. */
1041   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1042   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1043   {"dparam",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1044   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1045   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1046   {0,0,0,0, 0, 0, 0}
1047 };
1048
1049 static void daemon_usage(enum logcode F)
1050 {
1051   print_rsync_version(F);
1052
1053   rprintf(F,"\n");
1054   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
1055   rprintf(F,"     --address=ADDRESS       bind to the specified address\n");
1056   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
1057   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
1058   rprintf(F," -M, --dparam=OVERRIDE       override global daemon config parameter\n");
1059   rprintf(F,"     --no-detach             do not detach from the parent\n");
1060   rprintf(F,"     --port=PORT             listen on alternate port number\n");
1061   rprintf(F,"     --log-file=FILE         override the \"log file\" setting\n");
1062   rprintf(F,"     --log-file-format=FMT   override the \"log format\" setting\n");
1063   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
1064   rprintf(F," -v, --verbose               increase verbosity\n");
1065   rprintf(F," -4, --ipv4                  prefer IPv4\n");
1066   rprintf(F," -6, --ipv6                  prefer IPv6\n");
1067   rprintf(F,"     --help                  show this help screen\n");
1068
1069   rprintf(F,"\n");
1070   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
1071   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
1072 }
1073
1074 static struct poptOption long_daemon_options[] = {
1075   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
1076   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1077   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
1078   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
1079   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
1080   {"dparam",          'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1081   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1082   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1083   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
1084   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
1085   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
1086   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
1087   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1088   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1089   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1090   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
1091   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1092   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
1093   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1094   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1095   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
1096   {0,0,0,0, 0, 0, 0}
1097 };
1098
1099
1100 static char err_buf[200];
1101
1102
1103 /**
1104  * Store the option error message, if any, so that we can log the
1105  * connection attempt (which requires parsing the options), and then
1106  * show the error later on.
1107  **/
1108 void option_error(void)
1109 {
1110         if (!err_buf[0]) {
1111                 strlcpy(err_buf, "Error parsing options: option may "
1112                         "be supported on client but not on server?\n",
1113                         sizeof err_buf);
1114         }
1115
1116         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
1117         msleep(20);
1118 }
1119
1120
1121 /**
1122  * Tweak the option table to disable all options that the rsyncd.conf
1123  * file has told us to refuse.
1124  **/
1125 static void set_refuse_options(char *bp)
1126 {
1127         struct poptOption *op;
1128         char *cp, shortname[2];
1129         int is_wild, found_match;
1130
1131         shortname[1] = '\0';
1132
1133         while (1) {
1134                 while (*bp == ' ') bp++;
1135                 if (!*bp)
1136                         break;
1137                 if ((cp = strchr(bp, ' ')) != NULL)
1138                         *cp= '\0';
1139                 is_wild = strpbrk(bp, "*?[") != NULL;
1140                 found_match = 0;
1141                 for (op = long_options; ; op++) {
1142                         *shortname = op->shortName;
1143                         if (!op->longName && !*shortname)
1144                                 break;
1145                         if ((op->longName && wildmatch(bp, op->longName))
1146                             || (*shortname && wildmatch(bp, shortname))) {
1147                                 if (op->argInfo == POPT_ARG_VAL)
1148                                         op->argInfo = POPT_ARG_NONE;
1149                                 op->val = (op - long_options) + OPT_REFUSED_BASE;
1150                                 found_match = 1;
1151                                 /* These flags are set to let us easily check
1152                                  * an implied option later in the code. */
1153                                 switch (*shortname) {
1154                                 case 'r': case 'd': case 'l': case 'p':
1155                                 case 't': case 'g': case 'o': case 'D':
1156                                         refused_archive_part = op->val;
1157                                         break;
1158                                 case 'z':
1159                                         refused_compress = op->val;
1160                                         break;
1161                                 case '\0':
1162                                         if (wildmatch("delete", op->longName))
1163                                                 refused_delete = op->val;
1164                                         else if (wildmatch("delete-before", op->longName))
1165                                                 refused_delete_before = op->val;
1166                                         else if (wildmatch("delete-during", op->longName))
1167                                                 refused_delete_during = op->val;
1168                                         else if (wildmatch("partial", op->longName))
1169                                                 refused_partial = op->val;
1170                                         else if (wildmatch("progress", op->longName))
1171                                                 refused_progress = op->val;
1172                                         else if (wildmatch("inplace", op->longName))
1173                                                 refused_inplace = op->val;
1174                                         else if (wildmatch("no-iconv", op->longName))
1175                                                 refused_no_iconv = op->val;
1176                                         break;
1177                                 }
1178                                 if (!is_wild)
1179                                         break;
1180                         }
1181                 }
1182                 if (!found_match) {
1183                         rprintf(FLOG, "No match for refuse-options string \"%s\"\n",
1184                                 bp);
1185                 }
1186                 if (!cp)
1187                         break;
1188                 *cp = ' ';
1189                 bp = cp + 1;
1190         }
1191 }
1192
1193
1194 static int count_args(const char **argv)
1195 {
1196         int i = 0;
1197
1198         if (argv) {
1199                 while (argv[i] != NULL)
1200                         i++;
1201         }
1202
1203         return i;
1204 }
1205
1206
1207 static OFF_T parse_size_arg(char **size_arg, char def_suf)
1208 {
1209         int reps, mult, make_compatible = 0;
1210         const char *arg;
1211         OFF_T size = 1;
1212
1213         for (arg = *size_arg; isDigit(arg); arg++) {}
1214         if (*arg == '.')
1215                 for (arg++; isDigit(arg); arg++) {}
1216         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
1217         case 'b': case 'B':
1218                 reps = 0;
1219                 break;
1220         case 'k': case 'K':
1221                 reps = 1;
1222                 break;
1223         case 'm': case 'M':
1224                 reps = 2;
1225                 break;
1226         case 'g': case 'G':
1227                 reps = 3;
1228                 break;
1229         default:
1230                 return -1;
1231         }
1232         if (*arg == 'b' || *arg == 'B')
1233                 mult = 1000, make_compatible = 1, arg++;
1234         else if (!*arg || *arg == '+' || *arg == '-')
1235                 mult = 1024;
1236         else if (strncasecmp(arg, "ib", 2) == 0)
1237                 mult = 1024, arg += 2;
1238         else
1239                 return -1;
1240         while (reps--)
1241                 size *= mult;
1242         size *= atof(*size_arg);
1243         if ((*arg == '+' || *arg == '-') && arg[1] == '1')
1244                 size += atoi(arg), make_compatible = 1, arg += 2;
1245         if (*arg)
1246                 return -1;
1247         if (size > 0 && make_compatible && def_suf == 'b') {
1248                 /* We convert this manually because we may need %lld precision,
1249                  * and that's not a portable sprintf() escape. */
1250                 char buf[128], *s = buf + sizeof buf - 1;
1251                 OFF_T num = size;
1252                 *s = '\0';
1253                 while (num) {
1254                         *--s = (char)(num % 10) + '0';
1255                         num /= 10;
1256                 }
1257                 if (!(*size_arg = strdup(s)))
1258                         out_of_memory("parse_size_arg");
1259         }
1260         return size;
1261 }
1262
1263
1264 static void create_refuse_error(int which)
1265 {
1266         /* The "which" value is the index + OPT_REFUSED_BASE. */
1267         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
1268         int n = snprintf(err_buf, sizeof err_buf,
1269                          "The server is configured to refuse --%s\n",
1270                          op->longName) - 1;
1271         if (op->shortName) {
1272                 snprintf(err_buf + n, sizeof err_buf - n,
1273                          " (-%c)\n", op->shortName);
1274         }
1275 }
1276
1277
1278 /**
1279  * Process command line arguments.  Called on both local and remote.
1280  *
1281  * @retval 1 if all options are OK; with globals set to appropriate
1282  * values
1283  *
1284  * @retval 0 on error, with err_buf containing an explanation
1285  **/
1286 int parse_arguments(int *argc_p, const char ***argv_p)
1287 {
1288         static poptContext pc;
1289         char *ref = lp_refuse_options(module_id);
1290         const char *arg, **argv = *argv_p;
1291         int argc = *argc_p;
1292         int opt;
1293
1294         if (ref && *ref)
1295                 set_refuse_options(ref);
1296         if (am_daemon) {
1297                 set_refuse_options("log-file*");
1298 #ifdef ICONV_OPTION
1299                 if (!*lp_charset(module_id))
1300                         set_refuse_options("iconv");
1301 #endif
1302         }
1303
1304 #ifdef ICONV_OPTION
1305         if (!am_daemon && protect_args <= 0 && (arg = getenv("RSYNC_ICONV")) != NULL && *arg)
1306                 iconv_opt = strdup(arg);
1307 #endif
1308
1309         /* TODO: Call poptReadDefaultConfig; handle errors. */
1310
1311         /* The context leaks in case of an error, but if there's a
1312          * problem we always exit anyhow. */
1313         if (pc)
1314                 poptFreeContext(pc);
1315         pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1316         if (!am_server)
1317                 poptReadDefaultConfig(pc, 0);
1318
1319         while ((opt = poptGetNextOpt(pc)) != -1) {
1320                 /* most options are handled automatically by popt;
1321                  * only special cases are returned and listed here. */
1322
1323                 switch (opt) {
1324                 case OPT_VERSION:
1325                         print_rsync_version(FINFO);
1326                         exit_cleanup(0);
1327
1328                 case OPT_SERVER:
1329                         if (!am_server) {
1330                                 /* Disable popt aliases on the server side and
1331                                  * then start parsing the options again. */
1332                                 poptFreeContext(pc);
1333                                 pc = poptGetContext(RSYNC_NAME, argc, argv,
1334                                                     long_options, 0);
1335                                 am_server = 1;
1336                         }
1337 #ifdef ICONV_OPTION
1338                         iconv_opt = NULL;
1339 #endif
1340                         break;
1341
1342                 case OPT_SENDER:
1343                         if (!am_server) {
1344                                 usage(FERROR);
1345                                 exit_cleanup(RERR_SYNTAX);
1346                         }
1347                         am_sender = 1;
1348                         break;
1349
1350                 case OPT_DAEMON:
1351                         if (am_daemon) {
1352                                 strlcpy(err_buf,
1353                                         "Attempt to hack rsync thwarted!\n",
1354                                         sizeof err_buf);
1355                                 return 0;
1356                         }
1357 #ifdef ICONV_OPTION
1358                         iconv_opt = NULL;
1359 #endif
1360                         protect_args = 0;
1361                         poptFreeContext(pc);
1362                         pc = poptGetContext(RSYNC_NAME, argc, argv,
1363                                             long_daemon_options, 0);
1364                         while ((opt = poptGetNextOpt(pc)) != -1) {
1365                                 char **cpp;
1366                                 switch (opt) {
1367                                 case 'h':
1368                                         daemon_usage(FINFO);
1369                                         exit_cleanup(0);
1370
1371                                 case 'M':
1372                                         arg = poptGetOptArg(pc);
1373                                         if (!strchr(arg, '=')) {
1374                                                 rprintf(FERROR,
1375                                                     "--dparam value is missing an '=': %s\n",
1376                                                     arg);
1377                                                 goto daemon_error;
1378                                         }
1379                                         cpp = EXPAND_ITEM_LIST(&dparam_list, char *, 4);
1380                                         *cpp = strdup(arg);
1381                                         break;
1382
1383                                 case 'v':
1384                                         verbose++;
1385                                         break;
1386
1387                                 default:
1388                                         rprintf(FERROR,
1389                                             "rsync: %s: %s (in daemon mode)\n",
1390                                             poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1391                                             poptStrerror(opt));
1392                                         goto daemon_error;
1393                                 }
1394                         }
1395
1396                         if (dparam_list.count && !set_dparams(1))
1397                                 exit_cleanup(RERR_SYNTAX);
1398
1399                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1400                                 snprintf(err_buf, sizeof err_buf,
1401                                          "the --temp-dir path is WAY too long.\n");
1402                                 return 0;
1403                         }
1404
1405                         if (!daemon_opt) {
1406                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
1407                             daemon_error:
1408                                 rprintf(FERROR,
1409                                     "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
1410                                 exit_cleanup(RERR_SYNTAX);
1411                         }
1412
1413                         *argv_p = argv = poptGetArgs(pc);
1414                         *argc_p = argc = count_args(argv);
1415                         am_starting_up = 0;
1416                         daemon_opt = 0;
1417                         am_daemon = 1;
1418                         return 1;
1419
1420                 case OPT_MODIFY_WINDOW:
1421                         /* The value has already been set by popt, but
1422                          * we need to remember that we're using a
1423                          * non-default setting. */
1424                         modify_window_set = 1;
1425                         break;
1426
1427                 case OPT_FILTER:
1428                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1429                                         rule_template(0), 0);
1430                         break;
1431
1432                 case OPT_EXCLUDE:
1433                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1434                                         rule_template(0), XFLG_OLD_PREFIXES);
1435                         break;
1436
1437                 case OPT_INCLUDE:
1438                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1439                                         rule_template(FILTRULE_INCLUDE), XFLG_OLD_PREFIXES);
1440                         break;
1441
1442                 case OPT_EXCLUDE_FROM:
1443                 case OPT_INCLUDE_FROM:
1444                         arg = poptGetOptArg(pc);
1445                         if (sanitize_paths)
1446                                 arg = sanitize_path(NULL, arg, NULL, 0, SP_DEFAULT);
1447                         if (daemon_filter_list.head) {
1448                                 int rej;
1449                                 char *cp = strdup(arg);
1450                                 if (!cp)
1451                                         out_of_memory("parse_arguments");
1452                                 if (!*cp)
1453                                         rej = 1;
1454                                 else {
1455                                         char *dir = cp + (*cp == '/' ? module_dirlen : 0);
1456                                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1457                                         rej = check_filter(&daemon_filter_list, FLOG, dir, 0) < 0;
1458                                 }
1459                                 free(cp);
1460                                 if (rej)
1461                                         goto options_rejected;
1462                         }
1463                         parse_filter_file(&filter_list, arg,
1464                                 rule_template(opt == OPT_INCLUDE_FROM ? FILTRULE_INCLUDE : 0),
1465                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
1466                         break;
1467
1468                 case 'a':
1469                         if (refused_archive_part) {
1470                                 create_refuse_error(refused_archive_part);
1471                                 return 0;
1472                         }
1473                         if (!recurse) /* preserve recurse == 2 */
1474                                 recurse = 1;
1475 #ifdef SUPPORT_LINKS
1476                         preserve_links = 1;
1477 #endif
1478                         preserve_perms = 1;
1479                         preserve_times = 1;
1480                         preserve_gid = 1;
1481                         preserve_uid = 1;
1482                         preserve_devices = 1;
1483                         preserve_specials = 1;
1484                         break;
1485
1486                 case 'D':
1487                         preserve_devices = preserve_specials = 1;
1488                         break;
1489
1490                 case OPT_NO_D:
1491                         preserve_devices = preserve_specials = 0;
1492                         break;
1493
1494                 case 'h':
1495                         human_readable++;
1496                         break;
1497
1498                 case 'H':
1499                         preserve_hard_links++;
1500                         break;
1501
1502                 case 'i':
1503                         itemize_changes++;
1504                         break;
1505
1506                 case 'v':
1507                         verbose++;
1508                         break;
1509
1510                 case 'y':
1511                         fuzzy_basis++;
1512                         break;
1513
1514                 case 'q':
1515                         quiet++;
1516                         break;
1517
1518                 case 'x':
1519                         one_file_system++;
1520                         break;
1521
1522                 case 'F':
1523                         switch (++F_option_cnt) {
1524                         case 1:
1525                                 parse_filter_str(&filter_list,": /.rsync-filter",rule_template(0),0);
1526                                 break;
1527                         case 2:
1528                                 parse_filter_str(&filter_list,"- .rsync-filter",rule_template(0),0);
1529                                 break;
1530                         }
1531                         break;
1532
1533                 case 'P':
1534                         if (refused_partial || refused_progress) {
1535                                 create_refuse_error(refused_partial
1536                                     ? refused_partial : refused_progress);
1537                                 return 0;
1538                         }
1539                         do_progress = 1;
1540                         keep_partial = 1;
1541                         break;
1542
1543                 case 'z':
1544                         if (def_compress_level < Z_DEFAULT_COMPRESSION
1545                          || def_compress_level > Z_BEST_COMPRESSION) {
1546                                 snprintf(err_buf, sizeof err_buf,
1547                                         "--compress-level value is invalid: %d\n",
1548                                         def_compress_level);
1549                                 return 0;
1550                         }
1551                         do_compression = def_compress_level != Z_NO_COMPRESSION;
1552                         if (do_compression && refused_compress) {
1553                                 create_refuse_error(refused_compress);
1554                                 return 0;
1555                         }
1556                         break;
1557
1558                 case 'M':
1559                         arg = poptGetOptArg(pc);
1560                         if (*arg != '-') {
1561                                 snprintf(err_buf, sizeof err_buf,
1562                                         "Remote option must start with a dash: %s\n", arg);
1563                                 return 0;
1564                         }
1565                         if (remote_option_cnt+2 >= remote_option_alloc) {
1566                                 remote_option_alloc += 16;
1567                                 remote_options = realloc_array(remote_options,
1568                                                         const char *, remote_option_alloc);
1569                                 if (!remote_options)
1570                                         out_of_memory("parse_arguments");
1571                                 if (!remote_option_cnt)
1572                                         remote_options[0] = "ARG0";
1573                         }
1574                         remote_options[++remote_option_cnt] = arg;
1575                         remote_options[remote_option_cnt+1] = NULL;
1576                         break;
1577
1578                 case OPT_WRITE_BATCH:
1579                         /* batch_name is already set */
1580                         write_batch = 1;
1581                         break;
1582
1583                 case OPT_ONLY_WRITE_BATCH:
1584                         /* batch_name is already set */
1585                         write_batch = -1;
1586                         break;
1587
1588                 case OPT_READ_BATCH:
1589                         /* batch_name is already set */
1590                         read_batch = 1;
1591                         break;
1592
1593                 case OPT_NO_ICONV:
1594 #ifdef ICONV_OPTION
1595                         iconv_opt = NULL;
1596 #endif
1597                         break;
1598
1599                 case OPT_MAX_SIZE:
1600                         if ((max_size = parse_size_arg(&max_size_arg, 'b')) < 0) {
1601                                 snprintf(err_buf, sizeof err_buf,
1602                                         "--max-size value is invalid: %s\n",
1603                                         max_size_arg);
1604                                 return 0;
1605                         }
1606                         break;
1607
1608                 case OPT_MIN_SIZE:
1609                         if ((min_size = parse_size_arg(&min_size_arg, 'b')) < 0) {
1610                                 snprintf(err_buf, sizeof err_buf,
1611                                         "--min-size value is invalid: %s\n",
1612                                         min_size_arg);
1613                                 return 0;
1614                         }
1615                         break;
1616
1617                 case OPT_BWLIMIT:
1618                         {
1619                                 OFF_T limit = parse_size_arg(&bwlimit_arg, 'K');
1620                                 if (limit < 0) {
1621                                         snprintf(err_buf, sizeof err_buf,
1622                                                 "--bwlimit value is invalid: %s\n", bwlimit_arg);
1623                                         return 0;
1624                                 }
1625                                 bwlimit = (limit + 512) / 1024;
1626                                 if (limit && !bwlimit) {
1627                                         snprintf(err_buf, sizeof err_buf,
1628                                                 "--bwlimit value is too small: %s\n", bwlimit_arg);
1629                                         return 0;
1630                                 }
1631                         }
1632                         break;
1633
1634                 case OPT_APPEND:
1635                         if (am_server)
1636                                 append_mode++;
1637                         else
1638                                 append_mode = 1;
1639                         break;
1640
1641                 case OPT_LINK_DEST:
1642 #ifdef SUPPORT_HARD_LINKS
1643                         link_dest = 1;
1644                         dest_option = "--link-dest";
1645                         goto set_dest_dir;
1646 #else
1647                         snprintf(err_buf, sizeof err_buf,
1648                                  "hard links are not supported on this %s\n",
1649                                  am_server ? "server" : "client");
1650                         return 0;
1651 #endif
1652
1653                 case OPT_COPY_DEST:
1654                         copy_dest = 1;
1655                         dest_option = "--copy-dest";
1656                         goto set_dest_dir;
1657
1658                 case OPT_COMPARE_DEST:
1659                         compare_dest = 1;
1660                         dest_option = "--compare-dest";
1661                 set_dest_dir:
1662                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1663                                 snprintf(err_buf, sizeof err_buf,
1664                                         "ERROR: at most %d %s args may be specified\n",
1665                                         MAX_BASIS_DIRS, dest_option);
1666                                 return 0;
1667                         }
1668                         /* We defer sanitizing this arg until we know what
1669                          * our destination directory is going to be. */
1670                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1671                         break;
1672
1673                 case OPT_CHMOD:
1674                         arg = poptGetOptArg(pc);
1675                         if (!parse_chmod(arg, &chmod_modes)) {
1676                                 snprintf(err_buf, sizeof err_buf,
1677                                     "Invalid argument passed to --chmod (%s)\n",
1678                                     arg);
1679                                 return 0;
1680                         }
1681                         break;
1682
1683                 case OPT_INFO:
1684                         arg = poptGetOptArg(pc);
1685                         parse_output_words(info_words, info_levels, arg, USER_PRIORITY);
1686                         break;
1687
1688                 case OPT_DEBUG:
1689                         arg = poptGetOptArg(pc);
1690                         parse_output_words(debug_words, debug_levels, arg, USER_PRIORITY);
1691                         break;
1692
1693                 case OPT_USERMAP:
1694                         if (usermap) {
1695                                 if (usermap_via_chown) {
1696                                         snprintf(err_buf, sizeof err_buf,
1697                                             "--usermap conflicts with prior --chown.\n");
1698                                         return 0;
1699                                 }
1700                                 snprintf(err_buf, sizeof err_buf,
1701                                     "You can only specify --usermap once.\n");
1702                                 return 0;
1703                         }
1704                         usermap = (char *)poptGetOptArg(pc);
1705                         usermap_via_chown = False;
1706                         break;
1707
1708                 case OPT_GROUPMAP:
1709                         if (groupmap) {
1710                                 if (groupmap_via_chown) {
1711                                         snprintf(err_buf, sizeof err_buf,
1712                                             "--groupmap conflicts with prior --chown.\n");
1713                                         return 0;
1714                                 }
1715                                 snprintf(err_buf, sizeof err_buf,
1716                                     "You can only specify --groupmap once.\n");
1717                                 return 0;
1718                         }
1719                         groupmap = (char *)poptGetOptArg(pc);
1720                         groupmap_via_chown = False;
1721                         break;
1722
1723                 case OPT_CHOWN: {
1724                         const char *chown = poptGetOptArg(pc);
1725                         int len;
1726                         if ((arg = strchr(chown, ':')) != NULL)
1727                                 len = arg++ - chown;
1728                         else
1729                                 len = strlen(chown);
1730                         if (len) {
1731                                 if (usermap) {
1732                                         if (!usermap_via_chown) {
1733                                                 snprintf(err_buf, sizeof err_buf,
1734                                                     "--chown conflicts with prior --usermap.\n");
1735                                                 return 0;
1736                                         }
1737                                         snprintf(err_buf, sizeof err_buf,
1738                                             "You can only specify a user-affecting --chown once.\n");
1739                                         return 0;
1740                                 }
1741                                 if (asprintf(&usermap, "*:%.*s", len, chown) < 0)
1742                                         out_of_memory("parse_arguments");
1743                                 usermap_via_chown = True;
1744                         }
1745                         if (arg && *arg) {
1746                                 if (groupmap) {
1747                                         if (!groupmap_via_chown) {
1748                                                 snprintf(err_buf, sizeof err_buf,
1749                                                     "--chown conflicts with prior --groupmap.\n");
1750                                                 return 0;
1751                                         }
1752                                         snprintf(err_buf, sizeof err_buf,
1753                                             "You can only specify a group-affecting --chown once.\n");
1754                                         return 0;
1755                                 }
1756                                 if (asprintf(&groupmap, "*:%s", arg) < 0)
1757                                         out_of_memory("parse_arguments");
1758                                 groupmap_via_chown = True;
1759                         }
1760                         break;
1761                 }
1762
1763                 case OPT_HELP:
1764                         usage(FINFO);
1765                         exit_cleanup(0);
1766
1767                 case 'A':
1768 #ifdef SUPPORT_ACLS
1769                         preserve_acls = 1;
1770                         preserve_perms = 1;
1771                         break;
1772 #else
1773                         /* FIXME: this should probably be ignored with a
1774                          * warning and then countermeasures taken to
1775                          * restrict group and other access in the presence
1776                          * of any more restrictive ACLs, but this is safe
1777                          * for now */
1778                         snprintf(err_buf,sizeof(err_buf),
1779                                  "ACLs are not supported on this %s\n",
1780                                  am_server ? "server" : "client");
1781                         return 0;
1782 #endif
1783
1784                 case 'X':
1785 #ifdef SUPPORT_XATTRS
1786                         preserve_xattrs++;
1787                         break;
1788 #else
1789                         snprintf(err_buf,sizeof(err_buf),
1790                                  "extended attributes are not supported on this %s\n",
1791                                  am_server ? "server" : "client");
1792                         return 0;
1793 #endif
1794
1795                 default:
1796                         /* A large opt value means that set_refuse_options()
1797                          * turned this option off. */
1798                         if (opt >= OPT_REFUSED_BASE) {
1799                                 create_refuse_error(opt);
1800                                 return 0;
1801                         }
1802                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
1803                                  am_server ? "on remote machine: " : "",
1804                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1805                                  poptStrerror(opt));
1806                         return 0;
1807                 }
1808         }
1809
1810         if (protect_args < 0) {
1811                 if (am_server)
1812                         protect_args = 0;
1813                 else if ((arg = getenv("RSYNC_PROTECT_ARGS")) != NULL && *arg)
1814                         protect_args = atoi(arg) ? 1 : 0;
1815                 else {
1816 #ifdef RSYNC_USE_PROTECTED_ARGS
1817                         protect_args = 1;
1818 #else
1819                         protect_args = 0;
1820 #endif
1821                 }
1822         }
1823
1824         if (human_readable > 1 && argc == 2 && !am_server) {
1825                 /* Allow the old meaning of 'h' (--help) on its own. */
1826                 usage(FINFO);
1827                 exit_cleanup(0);
1828         }
1829
1830 #ifdef HAVE_SETVBUF
1831         if (outbuf_mode && !am_server) {
1832                 int mode = *(uchar *)outbuf_mode;
1833                 if (islower(mode))
1834                         mode = toupper(mode);
1835                 fflush(stdout); /* Just in case... */
1836                 switch (mode) {
1837                 case 'N': /* None */
1838                 case 'U': /* Unbuffered */
1839                         mode = _IONBF;
1840                         break;
1841                 case 'L': /* Line */
1842                         mode = _IOLBF;
1843                         break;
1844                 case 'B': /* Block */
1845                 case 'F': /* Full */
1846                         mode = _IOFBF;
1847                         break;
1848                 default:
1849                         snprintf(err_buf, sizeof err_buf,
1850                                 "Invalid --outbuf setting -- specify N, L, or B.\n");
1851                         return 0;
1852                 }
1853                 setvbuf(stdout, (char *)NULL, mode, 0);
1854         }
1855
1856         if (msgs2stderr) {
1857                 /* Make stderr line buffered for better sharing of the stream. */
1858                 fflush(stderr); /* Just in case... */
1859                 setvbuf(stderr, (char *)NULL, _IOLBF, 0);
1860         }
1861 #endif
1862
1863         set_output_verbosity(verbose, DEFAULT_PRIORITY);
1864
1865         if (do_stats) {
1866                 parse_output_words(info_words, info_levels,
1867                         verbose > 1 ? "stats3" : "stats2", DEFAULT_PRIORITY);
1868         }
1869
1870         if (human_readable) {
1871                 char buf[32];
1872                 snprintf(buf, sizeof buf, "%f", 3.14);
1873                 if (strchr(buf, '.') != NULL)
1874                         number_separator = ',';
1875                 else
1876                         number_separator = '.';
1877         }
1878
1879 #ifdef ICONV_OPTION
1880         if (iconv_opt && protect_args != 2) {
1881                 if (!am_server && strcmp(iconv_opt, "-") == 0)
1882                         iconv_opt = NULL;
1883                 else
1884                         need_unsorted_flist = 1;
1885         }
1886         if (refused_no_iconv && !iconv_opt) {
1887                 create_refuse_error(refused_no_iconv);
1888                 return 0;
1889         }
1890 #endif
1891
1892         if (fuzzy_basis > 1)
1893                 fuzzy_basis = basis_dir_cnt + 1;
1894
1895         if (protect_args == 1 && am_server)
1896                 return 1;
1897
1898         *argv_p = argv = poptGetArgs(pc);
1899         *argc_p = argc = count_args(argv);
1900
1901 #ifndef SUPPORT_LINKS
1902         if (preserve_links && !am_sender) {
1903                 snprintf(err_buf, sizeof err_buf,
1904                          "symlinks are not supported on this %s\n",
1905                          am_server ? "server" : "client");
1906                 return 0;
1907         }
1908 #endif
1909
1910 #ifndef SUPPORT_HARD_LINKS
1911         if (preserve_hard_links) {
1912                 snprintf(err_buf, sizeof err_buf,
1913                          "hard links are not supported on this %s\n",
1914                          am_server ? "server" : "client");
1915                 return 0;
1916         }
1917 #endif
1918
1919 #ifdef SUPPORT_XATTRS
1920         if (am_root < 0 && preserve_xattrs > 1) {
1921                 snprintf(err_buf, sizeof err_buf,
1922                          "--fake-super conflicts with -XX\n");
1923                 return 0;
1924         }
1925 #else
1926         if (am_root < 0) {
1927                 snprintf(err_buf, sizeof err_buf,
1928                          "--fake-super requires an rsync with extended attributes enabled\n");
1929                 return 0;
1930         }
1931 #endif
1932
1933         if (block_size > MAX_BLOCK_SIZE) {
1934                 snprintf(err_buf, sizeof err_buf,
1935                          "--block-size=%lu is too large (max: %u)\n", block_size, MAX_BLOCK_SIZE);
1936                 return 0;
1937         }
1938
1939         if (write_batch && read_batch) {
1940                 snprintf(err_buf, sizeof err_buf,
1941                         "--write-batch and --read-batch can not be used together\n");
1942                 return 0;
1943         }
1944         if (write_batch > 0 || read_batch) {
1945                 if (am_server) {
1946                         rprintf(FINFO,
1947                                 "ignoring --%s-batch option sent to server\n",
1948                                 write_batch ? "write" : "read");
1949                         /* We don't actually exit_cleanup(), so that we can
1950                          * still service older version clients that still send
1951                          * batch args to server. */
1952                         read_batch = write_batch = 0;
1953                         batch_name = NULL;
1954                 } else if (dry_run)
1955                         write_batch = 0;
1956         } else if (write_batch < 0 && dry_run)
1957                 write_batch = 0;
1958         if (read_batch && files_from) {
1959                 snprintf(err_buf, sizeof err_buf,
1960                         "--read-batch cannot be used with --files-from\n");
1961                 return 0;
1962         }
1963         if (read_batch && remove_source_files) {
1964                 snprintf(err_buf, sizeof err_buf,
1965                         "--read-batch cannot be used with --remove-%s-files\n",
1966                         remove_source_files == 1 ? "source" : "sent");
1967                 return 0;
1968         }
1969         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
1970                 snprintf(err_buf, sizeof err_buf,
1971                         "the batch-file name must be %d characters or less.\n",
1972                         MAX_BATCH_NAME_LEN);
1973                 return 0;
1974         }
1975
1976         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1977                 snprintf(err_buf, sizeof err_buf,
1978                          "the --temp-dir path is WAY too long.\n");
1979                 return 0;
1980         }
1981
1982         if (max_delete < 0 && max_delete != INT_MIN) {
1983                 /* Negative numbers are treated as "no deletions". */
1984                 max_delete = 0;
1985         }
1986
1987         if (compare_dest + copy_dest + link_dest > 1) {
1988                 snprintf(err_buf, sizeof err_buf,
1989                         "You may not mix --compare-dest, --copy-dest, and --link-dest.\n");
1990                 return 0;
1991         }
1992
1993         if (files_from) {
1994                 if (recurse == 1) /* preserve recurse == 2 */
1995                         recurse = 0;
1996                 if (xfer_dirs < 0)
1997                         xfer_dirs = 1;
1998         }
1999
2000         if (argc < 2 && !read_batch && !am_server)
2001                 list_only |= 1;
2002
2003         if (xfer_dirs >= 4) {
2004                 parse_filter_str(&filter_list, "- /*/*", rule_template(0), 0);
2005                 recurse = xfer_dirs = 1;
2006         } else if (recurse)
2007                 xfer_dirs = 1;
2008         else if (xfer_dirs < 0)
2009                 xfer_dirs = list_only ? 1 : 0;
2010
2011         if (relative_paths < 0)
2012                 relative_paths = files_from? 1 : 0;
2013         if (!relative_paths)
2014                 implied_dirs = 0;
2015
2016         if (delete_before + !!delete_during + delete_after > 1) {
2017                 snprintf(err_buf, sizeof err_buf,
2018                         "You may not combine multiple --delete-WHEN options.\n");
2019                 return 0;
2020         }
2021         if (delete_before || delete_during || delete_after)
2022                 delete_mode = 1;
2023         else if (delete_mode || delete_excluded) {
2024                 /* Only choose now between before & during if one is refused. */
2025                 if (refused_delete_before) {
2026                         if (!refused_delete_during)
2027                                 delete_during = 1;
2028                         else {
2029                                 create_refuse_error(refused_delete_before);
2030                                 return 0;
2031                         }
2032                 } else if (refused_delete_during)
2033                         delete_before = 1;
2034                 delete_mode = 1;
2035         }
2036         if (!xfer_dirs && delete_mode) {
2037                 snprintf(err_buf, sizeof err_buf,
2038                         "--delete does not work without --recursive (-r) or --dirs (-d).\n");
2039                 return 0;
2040         }
2041
2042         if (missing_args == 3) /* simplify if both options were specified */
2043                 missing_args = 2;
2044         if (refused_delete && (delete_mode || missing_args == 2)) {
2045                 create_refuse_error(refused_delete);
2046                 return 0;
2047         }
2048
2049         if (remove_source_files) {
2050                 /* We only want to infer this refusal of --remove-source-files
2051                  * via the refusal of "delete", not any of the "delete-FOO"
2052                  * options. */
2053                 if (refused_delete && am_sender) {
2054                         create_refuse_error(refused_delete);
2055                         return 0;
2056                 }
2057                 need_messages_from_generator = 1;
2058         }
2059
2060         if (munge_symlinks && !am_daemon) {
2061                 STRUCT_STAT st;
2062                 char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */
2063                 strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */
2064                 if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) {
2065                         rprintf(FERROR, "Symlink munging is unsafe when a %s directory exists.\n",
2066                                 prefix);
2067                         exit_cleanup(RERR_UNSUPPORTED);
2068                 }
2069         }
2070
2071         if (sanitize_paths) {
2072                 int i;
2073                 for (i = argc; i-- > 0; )
2074                         argv[i] = sanitize_path(NULL, argv[i], "", 0, SP_KEEP_DOT_DIRS);
2075                 if (tmpdir)
2076                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, SP_DEFAULT);
2077                 if (backup_dir)
2078                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, SP_DEFAULT);
2079         }
2080         if (daemon_filter_list.head && !am_sender) {
2081                 filter_rule_list *elp = &daemon_filter_list;
2082                 if (tmpdir) {
2083                         char *dir;
2084                         if (!*tmpdir)
2085                                 goto options_rejected;
2086                         dir = tmpdir + (*tmpdir == '/' ? module_dirlen : 0);
2087                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2088                         if (check_filter(elp, FLOG, dir, 1) < 0)
2089                                 goto options_rejected;
2090                 }
2091                 if (backup_dir) {
2092                         char *dir;
2093                         if (!*backup_dir)
2094                                 goto options_rejected;
2095                         dir = backup_dir + (*backup_dir == '/' ? module_dirlen : 0);
2096                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2097                         if (check_filter(elp, FLOG, dir, 1) < 0)
2098                                 goto options_rejected;
2099                 }
2100         }
2101
2102         if (!backup_suffix)
2103                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
2104         backup_suffix_len = strlen(backup_suffix);
2105         if (strchr(backup_suffix, '/') != NULL) {
2106                 snprintf(err_buf, sizeof err_buf,
2107                         "--suffix cannot contain slashes: %s\n",
2108                         backup_suffix);
2109                 return 0;
2110         }
2111         if (backup_dir) {
2112                 size_t len;
2113                 while (*backup_dir == '.' && backup_dir[1] == '/')
2114                         backup_dir += 2;
2115                 if (*backup_dir == '.' && backup_dir[1] == '\0')
2116                         backup_dir++;
2117                 len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
2118                 if (len > sizeof backup_dir_buf - 128) {
2119                         snprintf(err_buf, sizeof err_buf,
2120                                 "the --backup-dir path is WAY too long.\n");
2121                         return 0;
2122                 }
2123                 backup_dir_len = (int)len;
2124                 if (!backup_dir_len) {
2125                         backup_dir_len = -1;
2126                         backup_dir = NULL;
2127                 } else if (backup_dir_buf[backup_dir_len - 1] != '/') {
2128                         backup_dir_buf[backup_dir_len++] = '/';
2129                         backup_dir_buf[backup_dir_len] = '\0';
2130                 }
2131                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
2132         }
2133         if (backup_dir) {
2134                 /* No need for a suffix or a protect rule. */
2135         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
2136                 snprintf(err_buf, sizeof err_buf,
2137                         "--suffix cannot be empty %s\n", backup_dir_len < 0
2138                         ? "when --backup-dir is the same as the dest dir"
2139                         : "without a --backup-dir");
2140                 return 0;
2141         } else if (make_backups && delete_mode && !delete_excluded && !am_server) {
2142                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
2143                         "P *%s", backup_suffix);
2144                 parse_filter_str(&filter_list, backup_dir_buf, rule_template(0), 0);
2145         }
2146
2147         if (preserve_times) {
2148                 preserve_times = PRESERVE_FILE_TIMES;
2149                 if (!omit_dir_times)
2150                         preserve_times |= PRESERVE_DIR_TIMES;
2151 #ifdef CAN_SET_SYMLINK_TIMES
2152                 if (!omit_link_times)
2153                         preserve_times |= PRESERVE_LINK_TIMES;
2154 #endif
2155         }
2156
2157         if (make_backups && !backup_dir) {
2158                 omit_dir_times = 0; /* Implied, so avoid -O to sender. */
2159                 preserve_times &= ~PRESERVE_DIR_TIMES;
2160         }
2161
2162         if (stdout_format) {
2163                 if (am_server && log_format_has(stdout_format, 'I'))
2164                         stdout_format_has_i = 2;
2165                 else if (log_format_has(stdout_format, 'i'))
2166                         stdout_format_has_i = itemize_changes | 1;
2167                 if (!log_format_has(stdout_format, 'b')
2168                  && !log_format_has(stdout_format, 'c')
2169                  && !log_format_has(stdout_format, 'C'))
2170                         log_before_transfer = !am_server;
2171         } else if (itemize_changes) {
2172                 stdout_format = "%i %n%L";
2173                 stdout_format_has_i = itemize_changes;
2174                 log_before_transfer = !am_server;
2175         }
2176
2177         if (do_progress && !am_server) {
2178                 if (!log_before_transfer && INFO_EQ(NAME, 0))
2179                         parse_output_words(info_words, info_levels, "name", DEFAULT_PRIORITY);
2180                 parse_output_words(info_words, info_levels, "flist2,progress", DEFAULT_PRIORITY);
2181         }
2182
2183         if (dry_run)
2184                 do_xfers = 0;
2185
2186         set_io_timeout(io_timeout);
2187
2188         if (INFO_GTE(NAME, 1) && !stdout_format) {
2189                 stdout_format = "%n%L";
2190                 log_before_transfer = !am_server;
2191         }
2192         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
2193                 stdout_format_has_o_or_i = 1;
2194
2195         if (logfile_name && !am_daemon) {
2196                 if (!logfile_format) {
2197                         logfile_format = "%i %n%L";
2198                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
2199                 } else {
2200                         if (log_format_has(logfile_format, 'i'))
2201                                 logfile_format_has_i = 1;
2202                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
2203                                 logfile_format_has_o_or_i = 1;
2204                 }
2205                 log_init(0);
2206         } else if (!am_daemon)
2207                 logfile_format = NULL;
2208
2209         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
2210                 bwlimit = daemon_bwlimit;
2211         if (bwlimit) {
2212                 bwlimit_writemax = (size_t)bwlimit * 128;
2213                 if (bwlimit_writemax < 512)
2214                         bwlimit_writemax = 512;
2215         }
2216
2217         if (sparse_files && inplace) {
2218                 /* Note: we don't check for this below, because --append is
2219                  * OK with --sparse (as long as redos are handled right). */
2220                 snprintf(err_buf, sizeof err_buf,
2221                          "--sparse cannot be used with --inplace\n");
2222                 return 0;
2223         }
2224
2225         if (append_mode) {
2226                 if (whole_file > 0) {
2227                         snprintf(err_buf, sizeof err_buf,
2228                                  "--append cannot be used with --whole-file\n");
2229                         return 0;
2230                 }
2231                 if (refused_inplace) {
2232                         create_refuse_error(refused_inplace);
2233                         return 0;
2234                 }
2235                 inplace = 1;
2236         }
2237
2238         if (delay_updates && !partial_dir)
2239                 partial_dir = tmp_partialdir;
2240
2241         if (inplace) {
2242 #ifdef HAVE_FTRUNCATE
2243                 if (partial_dir) {
2244                         snprintf(err_buf, sizeof err_buf,
2245                                  "--%s cannot be used with --%s\n",
2246                                  append_mode ? "append" : "inplace",
2247                                  delay_updates ? "delay-updates" : "partial-dir");
2248                         return 0;
2249                 }
2250                 /* --inplace implies --partial for refusal purposes, but we
2251                  * clear the keep_partial flag for internal logic purposes. */
2252                 if (refused_partial) {
2253                         create_refuse_error(refused_partial);
2254                         return 0;
2255                 }
2256                 keep_partial = 0;
2257 #else
2258                 snprintf(err_buf, sizeof err_buf,
2259                          "--%s is not supported on this %s\n",
2260                          append_mode ? "append" : "inplace",
2261                          am_server ? "server" : "client");
2262                 return 0;
2263 #endif
2264         } else {
2265                 if (keep_partial && !partial_dir && !am_server) {
2266                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
2267                                 partial_dir = strdup(arg);
2268                 }
2269                 if (partial_dir) {
2270                         if (*partial_dir)
2271                                 clean_fname(partial_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2272                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
2273                                 partial_dir = NULL;
2274                         if (!partial_dir && refused_partial) {
2275                                 create_refuse_error(refused_partial);
2276                                 return 0;
2277                         }
2278                         keep_partial = 1;
2279                 }
2280         }
2281
2282         if (files_from) {
2283                 char *h, *p;
2284                 int q;
2285                 if (argc > 2 || (!am_daemon && !am_server && argc == 1)) {
2286                         usage(FERROR);
2287                         exit_cleanup(RERR_SYNTAX);
2288                 }
2289                 if (strcmp(files_from, "-") == 0) {
2290                         filesfrom_fd = 0;
2291                         if (am_server)
2292                                 filesfrom_host = ""; /* reading from socket */
2293                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
2294                         if (am_server) {
2295                                 snprintf(err_buf, sizeof err_buf,
2296                                         "The --files-from sent to the server cannot specify a host.\n");
2297                                 return 0;
2298                         }
2299                         files_from = p;
2300                         filesfrom_host = h;
2301                         if (strcmp(files_from, "-") == 0) {
2302                                 snprintf(err_buf, sizeof err_buf,
2303                                         "Invalid --files-from remote filename\n");
2304                                 return 0;
2305                         }
2306                 } else {
2307                         if (sanitize_paths)
2308                                 files_from = sanitize_path(NULL, files_from, NULL, 0, SP_DEFAULT);
2309                         if (daemon_filter_list.head) {
2310                                 char *dir;
2311                                 if (!*files_from)
2312                                         goto options_rejected;
2313                                 dir = files_from + (*files_from == '/' ? module_dirlen : 0);
2314                                 clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2315                                 if (check_filter(&daemon_filter_list, FLOG, dir, 0) < 0)
2316                                         goto options_rejected;
2317                         }
2318                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
2319                         if (filesfrom_fd < 0) {
2320                                 snprintf(err_buf, sizeof err_buf,
2321                                         "failed to open files-from file %s: %s\n",
2322                                         files_from, strerror(errno));
2323                                 return 0;
2324                         }
2325                 }
2326         }
2327
2328         am_starting_up = 0;
2329
2330         return 1;
2331
2332   options_rejected:
2333         snprintf(err_buf, sizeof err_buf,
2334                 "Your options have been rejected by the server.\n");
2335         return 0;
2336 }
2337
2338
2339 /**
2340  * Construct a filtered list of options to pass through from the
2341  * client to the server.
2342  *
2343  * This involves setting options that will tell the server how to
2344  * behave, and also filtering out options that are processed only
2345  * locally.
2346  **/
2347 void server_options(char **args, int *argc_p)
2348 {
2349         static char argstr[64];
2350         int ac = *argc_p;
2351         uchar where;
2352         char *arg;
2353         int i, x;
2354
2355         /* This should always remain first on the server's command-line. */
2356         args[ac++] = "--server";
2357
2358         if (daemon_over_rsh > 0) {
2359                 args[ac++] = "--daemon";
2360                 *argc_p = ac;
2361                 /* if we're passing --daemon, we're done */
2362                 return;
2363         }
2364
2365         if (!am_sender)
2366                 args[ac++] = "--sender";
2367
2368         x = 1;
2369         argstr[0] = '-';
2370
2371         if (protect_args)
2372                 argstr[x++] = 's';
2373
2374         for (i = 0; i < verbose; i++)
2375                 argstr[x++] = 'v';
2376
2377         /* the -q option is intentionally left out */
2378         if (make_backups)
2379                 argstr[x++] = 'b';
2380         if (update_only)
2381                 argstr[x++] = 'u';
2382         if (!do_xfers) /* Note: NOT "dry_run"! */
2383                 argstr[x++] = 'n';
2384         if (preserve_links)
2385                 argstr[x++] = 'l';
2386         if ((xfer_dirs >= 2 && xfer_dirs < 4)
2387          || (xfer_dirs && !recurse && (list_only || (delete_mode && am_sender))))
2388                 argstr[x++] = 'd';
2389         if (am_sender) {
2390                 if (keep_dirlinks)
2391                         argstr[x++] = 'K';
2392                 if (prune_empty_dirs)
2393                         argstr[x++] = 'm';
2394                 if (omit_dir_times)
2395                         argstr[x++] = 'O';
2396                 if (omit_link_times)
2397                         argstr[x++] = 'J';
2398                 if (fuzzy_basis) {
2399                         argstr[x++] = 'y';
2400                         if (fuzzy_basis > 1)
2401                                 argstr[x++] = 'y';
2402                 }
2403         } else {
2404                 if (copy_links)
2405                         argstr[x++] = 'L';
2406                 if (copy_dirlinks)
2407                         argstr[x++] = 'k';
2408         }
2409
2410         if (whole_file > 0)
2411                 argstr[x++] = 'W';
2412         /* We don't need to send --no-whole-file, because it's the
2413          * default for remote transfers, and in any case old versions
2414          * of rsync will not understand it. */
2415
2416         if (preserve_hard_links) {
2417                 argstr[x++] = 'H';
2418                 if (preserve_hard_links > 1)
2419                         argstr[x++] = 'H';
2420         }
2421         if (preserve_uid)
2422                 argstr[x++] = 'o';
2423         if (preserve_gid)
2424                 argstr[x++] = 'g';
2425         if (preserve_devices) /* ignore preserve_specials here */
2426                 argstr[x++] = 'D';
2427         if (preserve_times)
2428                 argstr[x++] = 't';
2429         if (preserve_perms)
2430                 argstr[x++] = 'p';
2431         else if (preserve_executability && am_sender)
2432                 argstr[x++] = 'E';
2433 #ifdef SUPPORT_ACLS
2434         if (preserve_acls)
2435                 argstr[x++] = 'A';
2436 #endif
2437 #ifdef SUPPORT_XATTRS
2438         if (preserve_xattrs) {
2439                 argstr[x++] = 'X';
2440                 if (preserve_xattrs > 1)
2441                         argstr[x++] = 'X';
2442         }
2443 #endif
2444         if (recurse)
2445                 argstr[x++] = 'r';
2446         if (always_checksum)
2447                 argstr[x++] = 'c';
2448         if (cvs_exclude)
2449                 argstr[x++] = 'C';
2450         if (ignore_times)
2451                 argstr[x++] = 'I';
2452         if (relative_paths)
2453                 argstr[x++] = 'R';
2454         if (one_file_system) {
2455                 argstr[x++] = 'x';
2456                 if (one_file_system > 1)
2457                         argstr[x++] = 'x';
2458         }
2459         if (sparse_files)
2460                 argstr[x++] = 'S';
2461         if (do_compression)
2462                 argstr[x++] = 'z';
2463
2464         set_allow_inc_recurse();
2465
2466         /* Checking the pre-negotiated value allows --protocol=29 override. */
2467         if (protocol_version >= 30) {
2468                 /* We make use of the -e option to let the server know about
2469                  * any pre-release protocol version && some behavior flags. */
2470                 argstr[x++] = 'e';
2471 #if SUBPROTOCOL_VERSION != 0
2472                 if (protocol_version == PROTOCOL_VERSION) {
2473                         x += snprintf(argstr+x, sizeof argstr - x,
2474                                       "%d.%d",
2475                                       PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
2476                 } else
2477 #endif
2478                         argstr[x++] = '.';
2479                 if (allow_inc_recurse)
2480                         argstr[x++] = 'i';
2481 #ifdef CAN_SET_SYMLINK_TIMES
2482                 argstr[x++] = 'L';
2483 #endif
2484 #ifdef ICONV_OPTION
2485                 argstr[x++] = 's';
2486 #endif
2487         }
2488
2489         if (x >= (int)sizeof argstr) { /* Not possible... */
2490                 rprintf(FERROR, "argstr overflow in server_options().\n");
2491                 exit_cleanup(RERR_MALLOC);
2492         }
2493
2494         argstr[x] = '\0';
2495
2496         if (x > 1)
2497                 args[ac++] = argstr;
2498
2499 #ifdef ICONV_OPTION
2500         if (iconv_opt) {
2501                 char *set = strchr(iconv_opt, ',');
2502                 if (set)
2503                         set++;
2504                 else
2505                         set = iconv_opt;
2506                 if (asprintf(&arg, "--iconv=%s", set) < 0)
2507                         goto oom;
2508                 args[ac++] = arg;
2509         }
2510 #endif
2511
2512         if (protect_args && !local_server) /* unprotected args stop here */
2513                 args[ac++] = NULL;
2514
2515         if (list_only > 1)
2516                 args[ac++] = "--list-only";
2517
2518         /* This makes sure that the remote rsync can handle deleting with -d
2519          * sans -r because the --no-r option was added at the same time. */
2520         if (xfer_dirs && !recurse && delete_mode && am_sender)
2521                 args[ac++] = "--no-r";
2522
2523         if (do_compression && def_compress_level != Z_DEFAULT_COMPRESSION) {
2524                 if (asprintf(&arg, "--compress-level=%d", def_compress_level) < 0)
2525                         goto oom;
2526                 args[ac++] = arg;
2527         }
2528
2529         if (preserve_devices) {
2530                 /* Note: sending "--devices" would not be backward-compatible. */
2531                 if (!preserve_specials)
2532                         args[ac++] = "--no-specials"; /* -D is already set. */
2533         } else if (preserve_specials)
2534                 args[ac++] = "--specials";
2535
2536         /* The server side doesn't use our log-format, but in certain
2537          * circumstances they need to know a little about the option. */
2538         if (stdout_format && am_sender) {
2539                 /* Use --log-format, not --out-format, for compatibility. */
2540                 if (stdout_format_has_i > 1)
2541                         args[ac++] = "--log-format=%i%I";
2542                 else if (stdout_format_has_i)
2543                         args[ac++] = "--log-format=%i";
2544                 else if (stdout_format_has_o_or_i)
2545                         args[ac++] = "--log-format=%o";
2546                 else if (!verbose)
2547                         args[ac++] = "--log-format=X";
2548         }
2549
2550         if (block_size) {
2551                 if (asprintf(&arg, "-B%lu", block_size) < 0)
2552                         goto oom;
2553                 args[ac++] = arg;
2554         }
2555
2556         if (io_timeout) {
2557                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
2558                         goto oom;
2559                 args[ac++] = arg;
2560         }
2561
2562         if (bwlimit) {
2563                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
2564                         goto oom;
2565                 args[ac++] = arg;
2566         }
2567
2568         if (backup_dir) {
2569                 args[ac++] = "--backup-dir";
2570                 args[ac++] = backup_dir;
2571         }
2572
2573         /* Only send --suffix if it specifies a non-default value. */
2574         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
2575                 /* We use the following syntax to avoid weirdness with '~'. */
2576                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
2577                         goto oom;
2578                 args[ac++] = arg;
2579         }
2580
2581         if (am_sender) {
2582                 if (max_delete > 0) {
2583                         if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
2584                                 goto oom;
2585                         args[ac++] = arg;
2586                 } else if (max_delete == 0)
2587                         args[ac++] = "--max-delete=-1";
2588                 if (min_size >= 0) {
2589                         args[ac++] = "--min-size";
2590                         args[ac++] = min_size_arg;
2591                 }
2592                 if (max_size >= 0) {
2593                         args[ac++] = "--max-size";
2594                         args[ac++] = max_size_arg;
2595                 }
2596                 if (delete_before)
2597                         args[ac++] = "--delete-before";
2598                 else if (delete_during == 2)
2599                         args[ac++] = "--delete-delay";
2600                 else if (delete_during)
2601                         args[ac++] = "--delete-during";
2602                 else if (delete_after)
2603                         args[ac++] = "--delete-after";
2604                 else if (delete_mode && !delete_excluded)
2605                         args[ac++] = "--delete";
2606                 if (delete_excluded)
2607                         args[ac++] = "--delete-excluded";
2608                 if (force_delete)
2609                         args[ac++] = "--force";
2610                 if (write_batch < 0)
2611                         args[ac++] = "--only-write-batch=X";
2612                 if (am_root > 1)
2613                         args[ac++] = "--super";
2614                 if (size_only)
2615                         args[ac++] = "--size-only";
2616                 if (do_stats)
2617                         args[ac++] = "--stats";
2618         } else {
2619                 if (skip_compress) {
2620                         if (asprintf(&arg, "--skip-compress=%s", skip_compress) < 0)
2621                                 goto oom;
2622                         args[ac++] = arg;
2623                 }
2624         }
2625
2626         /* --delete-missing-args needs the cooperation of both sides, but
2627          * the sender can handle --ignore-missing-args by itself. */
2628         if (missing_args == 2)
2629                 args[ac++] = "--delete-missing-args";
2630         else if (missing_args == 1 && !am_sender)
2631                 args[ac++] = "--ignore-missing-args";
2632
2633         if (modify_window_set) {
2634                 if (asprintf(&arg, "--modify-window=%d", modify_window) < 0)
2635                         goto oom;
2636                 args[ac++] = arg;
2637         }
2638
2639         if (checksum_seed) {
2640                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
2641                         goto oom;
2642                 args[ac++] = arg;
2643         }
2644
2645         if (partial_dir && am_sender) {
2646                 if (partial_dir != tmp_partialdir) {
2647                         args[ac++] = "--partial-dir";
2648                         args[ac++] = partial_dir;
2649                 }
2650                 if (delay_updates)
2651                         args[ac++] = "--delay-updates";
2652         } else if (keep_partial && am_sender)
2653                 args[ac++] = "--partial";
2654
2655         if (ignore_errors)
2656                 args[ac++] = "--ignore-errors";
2657
2658         if (copy_unsafe_links)
2659                 args[ac++] = "--copy-unsafe-links";
2660
2661         if (safe_symlinks)
2662                 args[ac++] = "--safe-links";
2663
2664         if (numeric_ids)
2665                 args[ac++] = "--numeric-ids";
2666
2667         if (use_qsort)
2668                 args[ac++] = "--use-qsort";
2669
2670         if (am_sender) {
2671                 if (usermap) {
2672                         if (asprintf(&arg, "--usermap=%s", usermap) < 0)
2673                                 goto oom;
2674                         args[ac++] = arg;
2675                 }
2676
2677                 if (groupmap) {
2678                         if (asprintf(&arg, "--groupmap=%s", groupmap) < 0)
2679                                 goto oom;
2680                         args[ac++] = arg;
2681                 }
2682
2683                 if (ignore_existing)
2684                         args[ac++] = "--ignore-existing";
2685
2686                 /* Backward compatibility: send --existing, not --ignore-non-existing. */
2687                 if (ignore_non_existing)
2688                         args[ac++] = "--existing";
2689
2690                 if (tmpdir) {
2691                         args[ac++] = "--temp-dir";
2692                         args[ac++] = tmpdir;
2693                 }
2694
2695                 if (basis_dir[0]) {
2696                         /* the server only needs this option if it is not the sender,
2697                          *   and it may be an older version that doesn't know this
2698                          *   option, so don't send it if client is the sender.
2699                          */
2700                         for (i = 0; i < basis_dir_cnt; i++) {
2701                                 args[ac++] = dest_option;
2702                                 args[ac++] = basis_dir[i];
2703                         }
2704                 }
2705         }
2706
2707         /* What flags do we need to send to the other side? */
2708         where = (am_server ? W_CLI : W_SRV) | (am_sender ? W_REC : W_SND);
2709         arg = make_output_option(info_words, info_levels, where);
2710         if (arg)
2711                 args[ac++] = arg;
2712
2713         arg = make_output_option(debug_words, debug_levels, where);
2714         if (arg)
2715                 args[ac++] = arg;
2716
2717         if (append_mode) {
2718                 if (append_mode > 1)
2719                         args[ac++] = "--append";
2720                 args[ac++] = "--append";
2721         } else if (inplace)
2722                 args[ac++] = "--inplace";
2723
2724         if (files_from && (!am_sender || filesfrom_host)) {
2725                 if (filesfrom_host) {
2726                         args[ac++] = "--files-from";
2727                         args[ac++] = files_from;
2728                         if (eol_nulls)
2729                                 args[ac++] = "--from0";
2730                 } else {
2731                         args[ac++] = "--files-from=-";
2732                         args[ac++] = "--from0";
2733                 }
2734                 if (!relative_paths)
2735                         args[ac++] = "--no-relative";
2736         }
2737         /* It's OK that this checks the upper-bound of the protocol_version. */
2738         if (relative_paths && !implied_dirs && (!am_sender || protocol_version >= 30))
2739                 args[ac++] = "--no-implied-dirs";
2740
2741         if (remove_source_files == 1)
2742                 args[ac++] = "--remove-source-files";
2743         else if (remove_source_files)
2744                 args[ac++] = "--remove-sent-files";
2745
2746         if (preallocate_files && am_sender)
2747                 args[ac++] = "--preallocate";
2748
2749         if (ac > MAX_SERVER_ARGS) { /* Not possible... */
2750                 rprintf(FERROR, "argc overflow in server_options().\n");
2751                 exit_cleanup(RERR_MALLOC);
2752         }
2753
2754         if (remote_option_cnt) {
2755                 int j;
2756                 if (ac + remote_option_cnt > MAX_SERVER_ARGS) {
2757                         rprintf(FERROR, "too many remote options specified.\n");
2758                         exit_cleanup(RERR_SYNTAX);
2759                 }
2760                 for (j = 1; j <= remote_option_cnt; j++)
2761                         args[ac++] = (char*)remote_options[j];
2762         }
2763
2764         *argc_p = ac;
2765         return;
2766
2767     oom:
2768         out_of_memory("server_options");
2769 }
2770
2771 /* If str points to a valid hostspec, return allocated memory containing the
2772  * [USER@]HOST part of the string, and set the path_start_ptr to the part of
2773  * the string after the host part.  Otherwise, return NULL.  If port_ptr is
2774  * non-NULL, we must be parsing an rsync:// URL hostname, and we will set
2775  * *port_ptr if a port number is found.  Note that IPv6 IPs will have their
2776  * (required for parsing) [ and ] chars elided from the returned string. */
2777 static char *parse_hostspec(char *str, char **path_start_ptr, int *port_ptr)
2778 {
2779         char *s, *host_start = str;
2780         int hostlen = 0, userlen = 0;
2781         char *ret;
2782
2783         for (s = str; ; s++) {
2784                 if (!*s) {
2785                         /* It is only OK if we run out of string with rsync:// */
2786                         if (!port_ptr)
2787                                 return NULL;
2788                         if (!hostlen)
2789                                 hostlen = s - host_start;
2790                         break;
2791                 }
2792                 if (*s == ':' || *s == '/') {
2793                         if (!hostlen)
2794                                 hostlen = s - host_start;
2795                         if (*s++ == '/') {
2796                                 if (!port_ptr)
2797                                         return NULL;
2798                         } else if (port_ptr) {
2799                                 *port_ptr = atoi(s);
2800                                 while (isDigit(s)) s++;
2801                                 if (*s && *s++ != '/')
2802                                         return NULL;
2803                         }
2804                         break;
2805                 }
2806                 if (*s == '@') {
2807                         userlen = s - str + 1;
2808                         host_start = s + 1;
2809                 } else if (*s == '[') {
2810                         if (s != host_start++)
2811                                 return NULL;
2812                         while (*s && *s != ']' && *s != '/') s++; /*SHARED ITERATOR*/
2813                         hostlen = s - host_start;
2814                         if (*s != ']' || (s[1] && s[1] != '/' && s[1] != ':') || !hostlen)
2815                                 return NULL;
2816                 }
2817         }
2818
2819         *path_start_ptr = s;
2820         ret = new_array(char, userlen + hostlen + 1);
2821         if (userlen)
2822                 strlcpy(ret, str, userlen + 1);
2823         strlcpy(ret + userlen, host_start, hostlen + 1);
2824         return ret;
2825 }
2826
2827 /* Look for a HOST specfication of the form "HOST:PATH", "HOST::PATH", or
2828  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
2829  * memory with the HOST.  If a daemon-accessing spec was specified, the value
2830  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
2831  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
2832  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
2833  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
2834 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
2835 {
2836         char *path;
2837
2838         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
2839                 *host_ptr = parse_hostspec(s + strlen(URL_PREFIX), &path, port_ptr);
2840                 if (*host_ptr) {
2841                         if (!*port_ptr)
2842                                 *port_ptr = RSYNC_PORT;
2843                         return path;
2844                 }
2845         }
2846
2847         *host_ptr = parse_hostspec(s, &path, NULL);
2848         if (!*host_ptr)
2849                 return NULL;
2850
2851         if (*path == ':') {
2852                 if (port_ptr && !*port_ptr)
2853                         *port_ptr = RSYNC_PORT;
2854                 return path + 1;
2855         }
2856         if (port_ptr)
2857                 *port_ptr = 0;
2858
2859         return path;
2860 }