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