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) 2002-2015 Wayne Davison
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, visit the http://fsf.org website.
  20  */
  21
  22 #include "rsync.h"
  23 #include "itypes.h"
  24 #include <popt.h>
  25 #include <zlib.h>
  26
  27 extern int module_id;
  28 extern int local_server;
  29 extern int sanitize_paths;
  30 extern int daemon_over_rsh;
  31 extern unsigned int module_dirlen;
  32 extern filter_rule_list filter_list;
  33 extern filter_rule_list daemon_filter_list;
  34
  35 #define NOT_SPECIFIED (-42)
  36
  37 int make_backups = 0;
  38
  39 /**
  40  * If 1, send the whole file as literal data rather than trying to
  41  * create an incremental diff.
  42  *
  43  * If -1, then look at whether we're local or remote and go by that.
  44  *
  45  * @sa disable_deltas_p()
  46  **/
  47 int whole_file = -1;
  48
  49 int append_mode = 0;
  50 int keep_dirlinks = 0;
  51 int copy_dirlinks = 0;
  52 int copy_links = 0;
  53 int preserve_links = 0;
  54 int preserve_hard_links = 0;
  55 int preserve_acls = 0;
  56 int preserve_xattrs = 0;
  57 int preserve_perms = 0;
  58 int preserve_executability = 0;
  59 int preserve_devices = 0;
  60 int preserve_specials = 0;
  61 int preserve_uid = 0;
  62 int preserve_gid = 0;
  63 int preserve_times = 0;
  64 int update_only = 0;
  65 int cvs_exclude = 0;
  66 int dry_run = 0;
  67 int do_xfers = 1;
  68 int ignore_times = 0;
  69 int delete_mode = 0;
  70 int delete_during = 0;
  71 int delete_before = 0;
  72 int delete_after = 0;
  73 int delete_excluded = 0;
  74 int remove_source_files = 0;
  75 int one_file_system = 0;
  76 int protocol_version = PROTOCOL_VERSION;
  77 int sparse_files = 0;
  78 int preallocate_files = 0;
  79 int do_compression = 0;
  80 int def_compress_level = NOT_SPECIFIED;
  81 int am_root = 0; /* 0 = normal, 1 = root, 2 = --super, -1 = --fake-super */
  82 int am_server = 0;
  83 int am_sender = 0;
  84 int am_starting_up = 1;
  85 int relative_paths = -1;
  86 int implied_dirs = 1;
  87 int missing_args = 0; /* 0 = FERROR_XFER, 1 = ignore, 2 = delete */
  88 int numeric_ids = 0;
  89 int msgs2stderr = 0;
  90 int allow_8bit_chars = 0;
  91 int force_delete = 0;
  92 int io_timeout = 0;
  93 int prune_empty_dirs = 0;
  94 int use_qsort = 0;
  95 char *files_from = NULL;
  96 int filesfrom_fd = -1;
  97 char *filesfrom_host = NULL;
  98 int eol_nulls = 0;
  99 int protect_args = -1;
 100 int human_readable = 1;
 101 int recurse = 0;
 102 int allow_inc_recurse = 1;
 103 int xfer_dirs = -1;
 104 int am_daemon = 0;
 105 int connect_timeout = 0;
 106 int keep_partial = 0;
 107 int safe_symlinks = 0;
 108 int copy_unsafe_links = 0;
 109 int munge_symlinks = 0;
 110 int size_only = 0;
 111 int daemon_bwlimit = 0;
 112 int bwlimit = 0;
 113 int fuzzy_basis = 0;
 114 size_t bwlimit_writemax = 0;
 115 int ignore_existing = 0;
 116 int ignore_non_existing = 0;
 117 int need_messages_from_generator = 0;
 118 int max_delete = INT_MIN;
 119 OFF_T max_size = -1;
 120 OFF_T min_size = -1;
 121 int ignore_errors = 0;
 122 int modify_window = 0;
 123 int blocking_io = -1;
 124 int checksum_seed = 0;
 125 int inplace = 0;
 126 int delay_updates = 0;
 127 long block_size = 0; /* "long" because popt can't set an int32. */
 128 char *skip_compress = NULL;
 129 item_list dparam_list = EMPTY_ITEM_LIST;
 130
 131 /** Network address family. **/
 132 int default_af_hint
 133 #ifdef INET6
 134         = 0;            /* Any protocol */
 135 #else
 136         = AF_INET;      /* Must use IPv4 */
 137 # ifdef AF_INET6
 138 #  undef AF_INET6
 139 # endif
 140 # define AF_INET6 AF_INET /* make -6 option a no-op */
 141 #endif
 142
 143 /** Do not go into the background when run as --daemon.  Good
 144  * for debugging and required for running as a service on W32,
 145  * or under Unix process-monitors. **/
 146 int no_detach
 147 #if defined _WIN32 || defined __WIN32__
 148         = 1;
 149 #else
 150         = 0;
 151 #endif
 152
 153 int write_batch = 0;
 154 int read_batch = 0;
 155 int backup_dir_len = 0;
 156 int backup_suffix_len;
 157 unsigned int backup_dir_remainder;
 158
 159 char *backup_suffix = NULL;
 160 char *tmpdir = NULL;
 161 char *partial_dir = NULL;
 162 char *basis_dir[MAX_BASIS_DIRS+1];
 163 char *config_file = NULL;
 164 char *shell_cmd = NULL;
 165 char *logfile_name = NULL;
 166 char *logfile_format = NULL;
 167 char *stdout_format = NULL;
 168 char *password_file = NULL;
 169 char *rsync_path = RSYNC_PATH;
 170 char *backup_dir = NULL;
 171 char backup_dir_buf[MAXPATHLEN];
 172 char *sockopts = NULL;
 173 char *usermap = NULL;
 174 char *groupmap = NULL;
 175 int rsync_port = 0;
 176 int compare_dest = 0;
 177 int copy_dest = 0;
 178 int link_dest = 0;
 179 int basis_dir_cnt = 0;
 180 char *dest_option = NULL;
 181
 182 static int remote_option_alloc = 0;
 183 int remote_option_cnt = 0;
 184 const char **remote_options = NULL;
 185 const char *checksum_choice = NULL;
 186
 187 int quiet = 0;
 188 int output_motd = 1;
 189 int log_before_transfer = 0;
 190 int stdout_format_has_i = 0;
 191 int stdout_format_has_o_or_i = 0;
 192 int logfile_format_has_i = 0;
 193 int logfile_format_has_o_or_i = 0;
 194 int always_checksum = 0;
 195 int list_only = 0;
 196
 197 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
 198 char *batch_name = NULL;
 199
 200 int need_unsorted_flist = 0;
 201 #ifdef ICONV_OPTION
 202 char *iconv_opt = ICONV_OPTION;
 203 #endif
 204
 205 struct chmod_mode_struct *chmod_modes = NULL;
 206
 207 static const char *debug_verbosity[] = {
 208         /*0*/ NULL,
 209         /*1*/ NULL,
 210         /*2*/ "BIND,CMD,CONNECT,DEL,DELTASUM,DUP,FILTER,FLIST,ICONV",
 211         /*3*/ "ACL,BACKUP,CONNECT2,DELTASUM2,DEL2,EXIT,FILTER2,FLIST2,FUZZY,GENR,OWN,RECV,SEND,TIME",
 212         /*4*/ "CMD2,DELTASUM3,DEL3,EXIT2,FLIST3,ICONV2,OWN2,PROTO,TIME2",
 213         /*5*/ "CHDIR,DELTASUM4,FLIST4,FUZZY2,HASH,HLINK",
 214 };
 215
 216 #define MAX_VERBOSITY ((int)(sizeof debug_verbosity / sizeof debug_verbosity[0]) - 1)
 217
 218 static const char *info_verbosity[1+MAX_VERBOSITY] = {
 219         /*0*/ NULL,
 220         /*1*/ "COPY,DEL,FLIST,MISC,NAME,STATS,SYMSAFE",
 221         /*2*/ "BACKUP,MISC2,MOUNT,NAME2,REMOVE,SKIP",
 222 };
 223
 224 #define MAX_OUT_LEVEL 4 /* The largest N allowed for any flagN word. */
 225
 226 short info_levels[COUNT_INFO], debug_levels[COUNT_DEBUG];
 227
 228 #define DEFAULT_PRIORITY 0      /* Default/implied/--verbose set values. */
 229 #define HELP_PRIORITY 1         /* The help output uses this level. */
 230 #define USER_PRIORITY 2         /* User-specified via --info or --debug */
 231 #define LIMIT_PRIORITY 3        /* Overriding priority when limiting values. */
 232
 233 #define W_CLI (1<<0)    /* client side */
 234 #define W_SRV (1<<1)    /* server side */
 235 #define W_SND (1<<2)    /* sending side */
 236 #define W_REC (1<<3)    /* receiving side */
 237
 238 struct output_struct {
 239         char *name;     /* The name of the info/debug flag. */
 240         char *help;     /* The description of the info/debug flag. */
 241         uchar namelen;  /* The length of the name string. */
 242         uchar flag;     /* The flag's value, for consistency check. */
 243         uchar where;    /* Bits indicating where the flag is used. */
 244         uchar priority; /* See *_PRIORITY defines. */
 245 };
 246
 247 #define INFO_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, INFO_##flag, where, 0 }
 248
 249 static struct output_struct info_words[COUNT_INFO+1] = {
 250         INFO_WORD(BACKUP, W_REC, "Mention files backed up"),
 251         INFO_WORD(COPY, W_REC, "Mention files copied locally on the receiving side"),
 252         INFO_WORD(DEL, W_REC, "Mention deletions on the receiving side"),
 253         INFO_WORD(FLIST, W_CLI, "Mention file-list receiving/sending (levels 1-2)"),
 254         INFO_WORD(MISC, W_SND|W_REC, "Mention miscellaneous information (levels 1-2)"),
 255         INFO_WORD(MOUNT, W_SND|W_REC, "Mention mounts that were found or skipped"),
 256         INFO_WORD(NAME, W_SND|W_REC, "Mention 1) updated file/dir names, 2) unchanged names"),
 257         INFO_WORD(PROGRESS, W_CLI, "Mention 1) per-file progress or 2) total transfer progress"),
 258         INFO_WORD(REMOVE, W_SND, "Mention files removed on the sending side"),
 259         INFO_WORD(SKIP, W_REC, "Mention files that are skipped due to options used"),
 260         INFO_WORD(STATS, W_CLI|W_SRV, "Mention statistics at end of run (levels 1-3)"),
 261         INFO_WORD(SYMSAFE, W_SND|W_REC, "Mention symlinks that are unsafe"),
 262         { NULL, "--info", 0, 0, 0, 0 }
 263 };
 264
 265 #define DEBUG_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, DEBUG_##flag, where, 0 }
 266
 267 static struct output_struct debug_words[COUNT_DEBUG+1] = {
 268         DEBUG_WORD(ACL, W_SND|W_REC, "Debug extra ACL info"),
 269         DEBUG_WORD(BACKUP, W_REC, "Debug backup actions (levels 1-2)"),
 270         DEBUG_WORD(BIND, W_CLI, "Debug socket bind actions"),
 271         DEBUG_WORD(CHDIR, W_CLI|W_SRV, "Debug when the current directory changes"),
 272         DEBUG_WORD(CONNECT, W_CLI, "Debug connection events (levels 1-2)"),
 273         DEBUG_WORD(CMD, W_CLI, "Debug commands+options that are issued (levels 1-2)"),
 274         DEBUG_WORD(DEL, W_REC, "Debug delete actions (levels 1-3)"),
 275         DEBUG_WORD(DELTASUM, W_SND|W_REC, "Debug delta-transfer checksumming (levels 1-4)"),
 276         DEBUG_WORD(DUP, W_REC, "Debug weeding of duplicate names"),
 277         DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-3)"),
 278         DEBUG_WORD(FILTER, W_SND|W_REC, "Debug filter actions (levels 1-2)"),
 279         DEBUG_WORD(FLIST, W_SND|W_REC, "Debug file-list operations (levels 1-4)"),
 280         DEBUG_WORD(FUZZY, W_REC, "Debug fuzzy scoring (levels 1-2)"),
 281         DEBUG_WORD(GENR, W_REC, "Debug generator functions"),
 282         DEBUG_WORD(HASH, W_SND|W_REC, "Debug hashtable code"),
 283         DEBUG_WORD(HLINK, W_SND|W_REC, "Debug hard-link actions (levels 1-3)"),
 284         DEBUG_WORD(ICONV, W_CLI|W_SRV, "Debug iconv character conversions (levels 1-2)"),
 285         DEBUG_WORD(IO, W_CLI|W_SRV, "Debug I/O routines (levels 1-4)"),
 286         DEBUG_WORD(OWN, W_REC, "Debug ownership changes in users & groups (levels 1-2)"),
 287         DEBUG_WORD(PROTO, W_CLI|W_SRV, "Debug protocol information"),
 288         DEBUG_WORD(RECV, W_REC, "Debug receiver functions"),
 289         DEBUG_WORD(SEND, W_SND, "Debug sender functions"),
 290         DEBUG_WORD(TIME, W_REC, "Debug setting of modified times (levels 1-2)"),
 291         { NULL, "--debug", 0, 0, 0, 0 }
 292 };
 293
 294 static int verbose = 0;
 295 static int do_stats = 0;
 296 static int do_progress = 0;
 297 static int daemon_opt;   /* sets am_daemon after option error-reporting */
 298 static int omit_dir_times = 0;
 299 static int omit_link_times = 0;
 300 static int F_option_cnt = 0;
 301 static int modify_window_set;
 302 static int itemize_changes = 0;
 303 static int refused_delete, refused_archive_part, refused_compress;
 304 static int refused_partial, refused_progress, refused_delete_before;
 305 static int refused_delete_during;
 306 static int refused_inplace, refused_no_iconv;
 307 static BOOL usermap_via_chown, groupmap_via_chown;
 308 #ifdef HAVE_SETVBUF
 309 static char *outbuf_mode;
 310 #endif
 311 static char *bwlimit_arg, *max_size_arg, *min_size_arg;
 312 static char tmp_partialdir[] = ".~tmp~";
 313
 314 /** Local address to bind.  As a character string because it's
 315  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
 316  * address, or a hostname. **/
 317 char *bind_address;
 318
 319 static void output_item_help(struct output_struct *words);
 320
 321 /* This constructs a string that represents all the options set for either
 322  * the --info or --debug setting, skipping any implied options (by -v, etc.).
 323  * This is used both when conveying the user's options to the server, and
 324  * when the help output wants to tell the user what options are implied. */
 325 static char *make_output_option(struct output_struct *words, short *levels, uchar where)
 326 {
 327         char *str = words == info_words ? "--info=" : "--debug=";
 328         int j, counts[MAX_OUT_LEVEL+1], pos, skipped = 0, len = 0, max = 0, lev = 0;
 329         int word_count = words == info_words ? COUNT_INFO : COUNT_DEBUG;
 330         char *buf;
 331
 332         memset(counts, 0, sizeof counts);
 333
 334         for (j = 0; words[j].name; j++) {
 335                 if (words[j].flag != j) {
 336                         rprintf(FERROR, "rsync: internal error on %s%s: %d != %d\n",
 337                                 words == info_words ? "INFO_" : "DEBUG_",
 338                                 words[j].name, words[j].flag, j);
 339                         exit_cleanup(RERR_UNSUPPORTED);
 340                 }
 341                 if (!(words[j].where & where))
 342                         continue;
 343                 if (words[j].priority == DEFAULT_PRIORITY) {
 344                         /* Implied items don't need to be mentioned. */
 345                         skipped++;
 346                         continue;
 347                 }
 348                 len += len ? 1 : strlen(str);
 349                 len += strlen(words[j].name);
 350                 len += levels[j] == 1 ? 0 : 1;
 351
 352                 if (words[j].priority == HELP_PRIORITY)
 353                         continue; /* no abbreviating for help */
 354
 355                 assert(levels[j] <= MAX_OUT_LEVEL);
 356                 if (++counts[levels[j]] > max) {
 357                         /* Determine which level has the most items. */
 358                         lev = levels[j];
 359                         max = counts[lev];
 360                 }
 361         }
 362
 363         /* Sanity check the COUNT_* define against the length of the table. */
 364         if (j != word_count) {
 365                 rprintf(FERROR, "rsync: internal error: %s is wrong! (%d != %d)\n",
 366                         words == info_words ? "COUNT_INFO" : "COUNT_DEBUG",
 367                         j, word_count);
 368                 exit_cleanup(RERR_UNSUPPORTED);
 369         }
 370
 371         if (!len)
 372                 return NULL;
 373
 374         len++;
 375         if (!(buf = new_array(char, len)))
 376                 out_of_memory("make_output_option");
 377         pos = 0;
 378
 379         if (skipped || max < 5)
 380                 lev = -1;
 381         else {
 382                 if (lev == 0)
 383                         pos += snprintf(buf, len, "%sNONE", str);
 384                 else if (lev == 1)
 385                         pos += snprintf(buf, len, "%sALL", str);
 386                 else
 387                         pos += snprintf(buf, len, "%sALL%d", str, lev);
 388         }
 389
 390         for (j = 0; words[j].name && pos < len; j++) {
 391                 if (words[j].priority == DEFAULT_PRIORITY || levels[j] == lev || !(words[j].where & where))
 392                         continue;
 393                 if (pos)
 394                         buf[pos++] = ',';
 395                 else
 396                         pos += strlcpy(buf+pos, str, len-pos);
 397                 if (pos < len)
 398                         pos += strlcpy(buf+pos, words[j].name, len-pos);
 399                 /* Level 1 is implied by the name alone. */
 400                 if (levels[j] != 1 && pos < len)
 401                         buf[pos++] = '0' + levels[j];
 402         }
 403
 404         buf[pos] = '\0';
 405
 406         return buf;
 407 }
 408
 409 static void parse_output_words(struct output_struct *words, short *levels,
 410                                const char *str, uchar priority)
 411 {
 412         const char *s;
 413         int j, len, lev;
 414
 415         for ( ; str; str = s) {
 416                 if ((s = strchr(str, ',')) != NULL)
 417                         len = s++ - str;
 418                 else
 419                         len = strlen(str);
 420                 if (!len)
 421                         continue;
 422                 if (!isDigit(str)) {
 423                         while (len && isDigit(str+len-1))
 424                                 len--;
 425                 }
 426                 lev = isDigit(str+len) ? atoi(str+len) : 1;
 427                 if (lev > MAX_OUT_LEVEL)
 428                         lev = MAX_OUT_LEVEL;
 429                 if (len == 4 && strncasecmp(str, "help", 4) == 0) {
 430                         output_item_help(words);
 431                         exit_cleanup(0);
 432                 }
 433                 if (len == 4 && strncasecmp(str, "none", 4) == 0)
 434                         len = lev = 0;
 435                 else if (len == 3 && strncasecmp(str, "all", 3) == 0)
 436                         len = 0;
 437                 for (j = 0; words[j].name; j++) {
 438                         if (!len
 439                          || (len == words[j].namelen && strncasecmp(str, words[j].name, len) == 0)) {
 440                                 if (priority >= words[j].priority) {
 441                                         words[j].priority = priority;
 442                                         levels[j] = lev;
 443                                 }
 444                                 if (len)
 445                                         break;
 446                         }
 447                 }
 448                 if (len && !words[j].name) {
 449                         rprintf(FERROR, "Unknown %s item: \"%.*s\"\n",
 450                                 words[j].help, len, str);
 451                         exit_cleanup(RERR_SYNTAX);
 452                 }
 453         }
 454 }
 455
 456 /* Tell the user what all the info or debug flags mean. */
 457 static void output_item_help(struct output_struct *words)
 458 {
 459         short *levels = words == info_words ? info_levels : debug_levels;
 460         const char **verbosity = words == info_words ? info_verbosity : debug_verbosity;
 461         char buf[128], *opt, *fmt = "%-10s %s\n";
 462         int j;
 463
 464         reset_output_levels();
 465
 466         rprintf(FINFO, "Use OPT or OPT1 for level 1 output, OPT2 for level 2, etc.; OPT0 silences.\n");
 467         rprintf(FINFO, "\n");
 468         for (j = 0; words[j].name; j++)
 469                 rprintf(FINFO, fmt, words[j].name, words[j].help);
 470         rprintf(FINFO, "\n");
 471
 472         snprintf(buf, sizeof buf, "Set all %s options (e.g. all%d)",
 473                  words[j].help, MAX_OUT_LEVEL);
 474         rprintf(FINFO, fmt, "ALL", buf);
 475
 476         snprintf(buf, sizeof buf, "Silence all %s options (same as all0)",
 477                  words[j].help);
 478         rprintf(FINFO, fmt, "NONE", buf);
 479
 480         rprintf(FINFO, fmt, "HELP", "Output this help message");
 481         rprintf(FINFO, "\n");
 482         rprintf(FINFO, "Options added for each increase in verbose level:\n");
 483
 484         for (j = 1; j <= MAX_VERBOSITY; j++) {
 485                 parse_output_words(words, levels, verbosity[j], HELP_PRIORITY);
 486                 opt = make_output_option(words, levels, W_CLI|W_SRV|W_SND|W_REC);
 487                 if (opt) {
 488                         rprintf(FINFO, "%d) %s\n", j, strchr(opt, '=')+1);
 489                         free(opt);
 490                 }
 491                 reset_output_levels();
 492         }
 493 }
 494
 495 /* The --verbose option now sets info+debug flags. */
 496 static void set_output_verbosity(int level, uchar priority)
 497 {
 498         int j;
 499
 500         if (level > MAX_VERBOSITY)
 501                 level = MAX_VERBOSITY;
 502
 503         for (j = 1; j <= level; j++) {
 504                 parse_output_words(info_words, info_levels, info_verbosity[j], priority);
 505                 parse_output_words(debug_words, debug_levels, debug_verbosity[j], priority);
 506         }
 507 }
 508
 509 /* Limit the info+debug flag levels given a verbose-option level limit. */
 510 void limit_output_verbosity(int level)
 511 {
 512         short info_limits[COUNT_INFO], debug_limits[COUNT_DEBUG];
 513         int j;
 514
 515         if (level > MAX_VERBOSITY)
 516                 return;
 517
 518         memset(info_limits, 0, sizeof info_limits);
 519         memset(debug_limits, 0, sizeof debug_limits);
 520
 521         /* Compute the level limits in the above arrays. */
 522         for (j = 1; j <= level; j++) {
 523                 parse_output_words(info_words, info_limits, info_verbosity[j], LIMIT_PRIORITY);
 524                 parse_output_words(debug_words, debug_limits, debug_verbosity[j], LIMIT_PRIORITY);
 525         }
 526
 527         for (j = 0; j < COUNT_INFO; j++) {
 528                 if (info_levels[j] > info_limits[j])
 529                         info_levels[j] = info_limits[j];
 530         }
 531
 532         for (j = 0; j < COUNT_DEBUG; j++) {
 533                 if (debug_levels[j] > debug_limits[j])
 534                         debug_levels[j] = debug_limits[j];
 535         }
 536 }
 537
 538 void reset_output_levels(void)
 539 {
 540         int j;
 541
 542         memset(info_levels, 0, sizeof info_levels);
 543         memset(debug_levels, 0, sizeof debug_levels);
 544
 545         for (j = 0; j < COUNT_INFO; j++)
 546                 info_words[j].priority = DEFAULT_PRIORITY;
 547
 548         for (j = 0; j < COUNT_DEBUG; j++)
 549                 debug_words[j].priority = DEFAULT_PRIORITY;
 550 }
 551
 552 void negate_output_levels(void)
 553 {
 554         int j;
 555
 556         for (j = 0; j < COUNT_INFO; j++)
 557                 info_levels[j] *= -1;
 558
 559         for (j = 0; j < COUNT_DEBUG; j++)
 560                 debug_levels[j] *= -1;
 561 }
 562
 563 static void print_rsync_version(enum logcode f)
 564 {
 565         char *subprotocol = "";
 566         char const *got_socketpair = "no ";
 567         char const *have_inplace = "no ";
 568         char const *hardlinks = "no ";
 569         char const *prealloc = "no ";
 570         char const *symtimes = "no ";
 571         char const *acls = "no ";
 572         char const *xattrs = "no ";
 573         char const *links = "no ";
 574         char const *iconv = "no ";
 575         char const *ipv6 = "no ";
 576         STRUCT_STAT *dumstat;
 577
 578 #if SUBPROTOCOL_VERSION != 0
 579         if (asprintf(&subprotocol, ".PR%d", SUBPROTOCOL_VERSION) < 0)
 580                 out_of_memory("print_rsync_version");
 581 #endif
 582 #ifdef HAVE_SOCKETPAIR
 583         got_socketpair = "";
 584 #endif
 585 #ifdef HAVE_FTRUNCATE
 586         have_inplace = "";
 587 #endif
 588 #ifdef SUPPORT_HARD_LINKS
 589         hardlinks = "";
 590 #endif
 591 #ifdef SUPPORT_PREALLOCATION
 592         prealloc = "";
 593 #endif
 594 #ifdef SUPPORT_ACLS
 595         acls = "";
 596 #endif
 597 #ifdef SUPPORT_XATTRS
 598         xattrs = "";
 599 #endif
 600 #ifdef SUPPORT_LINKS
 601         links = "";
 602 #endif
 603 #ifdef INET6
 604         ipv6 = "";
 605 #endif
 606 #ifdef ICONV_OPTION
 607         iconv = "";
 608 #endif
 609 #ifdef CAN_SET_SYMLINK_TIMES
 610         symtimes = "";
 611 #endif
 612
 613         rprintf(f, "%s  version %s  protocol version %d%s\n",
 614                 RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION, subprotocol);
 615         rprintf(f, "Copyright (C) 1996-2015 by Andrew Tridgell, Wayne Davison, and others.\n");
 616         rprintf(f, "Web site: http://rsync.samba.org/\n");
 617         rprintf(f, "Capabilities:\n");
 618         rprintf(f, "    %d-bit files, %d-bit inums, %d-bit timestamps, %d-bit long ints,\n",
 619                 (int)(sizeof (OFF_T) * 8),
 620                 (int)(sizeof dumstat->st_ino * 8), /* Don't check ino_t! */
 621                 (int)(sizeof (time_t) * 8),
 622                 (int)(sizeof (int64) * 8));
 623         rprintf(f, "    %ssocketpairs, %shardlinks, %ssymlinks, %sIPv6, batchfiles, %sinplace,\n",
 624                 got_socketpair, hardlinks, links, ipv6, have_inplace);
 625         rprintf(f, "    %sappend, %sACLs, %sxattrs, %siconv, %ssymtimes, %sprealloc\n",
 626                 have_inplace, acls, xattrs, iconv, symtimes, prealloc);
 627
 628 #ifdef MAINTAINER_MODE
 629         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
 630 #endif
 631
 632 #if SIZEOF_INT64 < 8
 633         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
 634 #endif
 635         if (sizeof (int64) != SIZEOF_INT64) {
 636                 rprintf(f,
 637                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
 638                         (int) SIZEOF_INT64, (int) sizeof (int64));
 639         }
 640
 641         rprintf(f,"\n");
 642         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
 643         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
 644         rprintf(f,"General Public Licence for details.\n");
 645 }
 646
 647
 648 void usage(enum logcode F)
 649 {
 650   print_rsync_version(F);
 651
 652   rprintf(F,"\n");
 653   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
 654   rprintf(F,"via a fast differencing algorithm.\n");
 655
 656   rprintf(F,"\n");
 657   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
 658   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
 659   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
 660   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
 661   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
 662   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
 663   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
 664   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
 665   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
 666   rprintf(F,"\n");
 667   rprintf(F,"Options\n");
 668   rprintf(F," -v, --verbose               increase verbosity\n");
 669   rprintf(F,"     --info=FLAGS            fine-grained informational verbosity\n");
 670   rprintf(F,"     --debug=FLAGS           fine-grained debug verbosity\n");
 671   rprintf(F,"     --msgs2stderr           special output handling for debugging\n");
 672   rprintf(F," -q, --quiet                 suppress non-error messages\n");
 673   rprintf(F,"     --no-motd               suppress daemon-mode MOTD (see manpage caveat)\n");
 674   rprintf(F," -c, --checksum              skip based on checksum, not mod-time & size\n");
 675   rprintf(F," -a, --archive               archive mode; equals -rlptgoD (no -H,-A,-X)\n");
 676   rprintf(F,"     --no-OPTION             turn off an implied OPTION (e.g. --no-D)\n");
 677   rprintf(F," -r, --recursive             recurse into directories\n");
 678   rprintf(F," -R, --relative              use relative path names\n");
 679   rprintf(F,"     --no-implied-dirs       don't send implied dirs with --relative\n");
 680   rprintf(F," -b, --backup                make backups (see --suffix & --backup-dir)\n");
 681   rprintf(F,"     --backup-dir=DIR        make backups into hierarchy based in DIR\n");
 682   rprintf(F,"     --suffix=SUFFIX         set backup suffix (default %s w/o --backup-dir)\n",BACKUP_SUFFIX);
 683   rprintf(F," -u, --update                skip files that are newer on the receiver\n");
 684   rprintf(F,"     --inplace               update destination files in-place (SEE MAN PAGE)\n");
 685   rprintf(F,"     --append                append data onto shorter files\n");
 686   rprintf(F,"     --append-verify         like --append, but with old data in file checksum\n");
 687   rprintf(F," -d, --dirs                  transfer directories without recursing\n");
 688   rprintf(F," -l, --links                 copy symlinks as symlinks\n");
 689   rprintf(F," -L, --copy-links            transform symlink into referent file/dir\n");
 690   rprintf(F,"     --copy-unsafe-links     only \"unsafe\" symlinks are transformed\n");
 691   rprintf(F,"     --safe-links            ignore symlinks that point outside the source tree\n");
 692   rprintf(F,"     --munge-links           munge symlinks to make them safer (but unusable)\n");
 693   rprintf(F," -k, --copy-dirlinks         transform symlink to a dir into referent dir\n");
 694   rprintf(F," -K, --keep-dirlinks         treat symlinked dir on receiver as dir\n");
 695   rprintf(F," -H, --hard-links            preserve hard links\n");
 696   rprintf(F," -p, --perms                 preserve permissions\n");
 697   rprintf(F," -E, --executability         preserve the file's executability\n");
 698   rprintf(F,"     --chmod=CHMOD           affect file and/or directory permissions\n");
 699 #ifdef SUPPORT_ACLS
 700   rprintf(F," -A, --acls                  preserve ACLs (implies --perms)\n");
 701 #endif
 702 #ifdef SUPPORT_XATTRS
 703   rprintf(F," -X, --xattrs                preserve extended attributes\n");
 704 #endif
 705   rprintf(F," -o, --owner                 preserve owner (super-user only)\n");
 706   rprintf(F," -g, --group                 preserve group\n");
 707   rprintf(F,"     --devices               preserve device files (super-user only)\n");
 708   rprintf(F,"     --specials              preserve special files\n");
 709   rprintf(F," -D                          same as --devices --specials\n");
 710   rprintf(F," -t, --times                 preserve modification times\n");
 711   rprintf(F," -O, --omit-dir-times        omit directories from --times\n");
 712   rprintf(F," -J, --omit-link-times       omit symlinks from --times\n");
 713   rprintf(F,"     --super                 receiver attempts super-user activities\n");
 714 #ifdef SUPPORT_XATTRS
 715   rprintf(F,"     --fake-super            store/recover privileged attrs using xattrs\n");
 716 #endif
 717   rprintf(F," -S, --sparse                turn sequences of nulls into sparse blocks\n");
 718 #ifdef SUPPORT_PREALLOCATION
 719   rprintf(F,"     --preallocate           allocate dest files before writing them\n");
 720 #else
 721   rprintf(F,"     --preallocate           pre-allocate dest files on remote receiver\n");
 722 #endif
 723   rprintf(F," -n, --dry-run               perform a trial run with no changes made\n");
 724   rprintf(F," -W, --whole-file            copy files whole (without delta-xfer algorithm)\n");
 725   rprintf(F,"     --checksum-choice=STR   choose the checksum algorithms\n");
 726   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
 727   rprintf(F," -B, --block-size=SIZE       force a fixed checksum block-size\n");
 728   rprintf(F," -e, --rsh=COMMAND           specify the remote shell to use\n");
 729   rprintf(F,"     --rsync-path=PROGRAM    specify the rsync to run on the remote machine\n");
 730   rprintf(F,"     --existing              skip creating new files on receiver\n");
 731   rprintf(F,"     --ignore-existing       skip updating files that already exist on receiver\n");
 732   rprintf(F,"     --remove-source-files   sender removes synchronized files (non-dirs)\n");
 733   rprintf(F,"     --del                   an alias for --delete-during\n");
 734   rprintf(F,"     --delete                delete extraneous files from destination dirs\n");
 735   rprintf(F,"     --delete-before         receiver deletes before transfer, not during\n");
 736   rprintf(F,"     --delete-during         receiver deletes during the transfer\n");
 737   rprintf(F,"     --delete-delay          find deletions during, delete after\n");
 738   rprintf(F,"     --delete-after          receiver deletes after transfer, not during\n");
 739   rprintf(F,"     --delete-excluded       also delete excluded files from destination dirs\n");
 740   rprintf(F,"     --ignore-missing-args   ignore missing source args without error\n");
 741   rprintf(F,"     --delete-missing-args   delete missing source args from destination\n");
 742   rprintf(F,"     --ignore-errors         delete even if there are I/O errors\n");
 743   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
 744   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
 745   rprintf(F,"     --max-size=SIZE         don't transfer any file larger than SIZE\n");
 746   rprintf(F,"     --min-size=SIZE         don't transfer any file smaller than SIZE\n");
 747   rprintf(F,"     --partial               keep partially transferred files\n");
 748   rprintf(F,"     --partial-dir=DIR       put a partially transferred file into DIR\n");
 749   rprintf(F,"     --delay-updates         put all updated files into place at transfer's end\n");
 750   rprintf(F," -m, --prune-empty-dirs      prune empty directory chains from the file-list\n");
 751   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
 752   rprintf(F,"     --usermap=STRING        custom username mapping\n");
 753   rprintf(F,"     --groupmap=STRING       custom groupname mapping\n");
 754   rprintf(F,"     --chown=USER:GROUP      simple username/groupname mapping\n");
 755   rprintf(F,"     --timeout=SECONDS       set I/O timeout in seconds\n");
 756   rprintf(F,"     --contimeout=SECONDS    set daemon connection timeout in seconds\n");
 757   rprintf(F," -I, --ignore-times          don't skip files that match in size and mod-time\n");
 758   rprintf(F," -M, --remote-option=OPTION  send OPTION to the remote side only\n");
 759   rprintf(F,"     --size-only             skip files that match in size\n");
 760   rprintf(F," -@, --modify-window=NUM     set the accuracy for mod-time comparisons\n");
 761   rprintf(F," -T, --temp-dir=DIR          create temporary files in directory DIR\n");
 762   rprintf(F," -y, --fuzzy                 find similar file for basis if no dest file\n");
 763   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
 764   rprintf(F,"     --copy-dest=DIR         ... and include copies of unchanged files\n");
 765   rprintf(F,"     --link-dest=DIR         hardlink to files in DIR when unchanged\n");
 766   rprintf(F," -z, --compress              compress file data during the transfer\n");
 767   rprintf(F,"     --compress-level=NUM    explicitly set compression level\n");
 768   rprintf(F,"     --skip-compress=LIST    skip compressing files with a suffix in LIST\n");
 769   rprintf(F," -C, --cvs-exclude           auto-ignore files the same way CVS does\n");
 770   rprintf(F," -f, --filter=RULE           add a file-filtering RULE\n");
 771   rprintf(F," -F                          same as --filter='dir-merge /.rsync-filter'\n");
 772   rprintf(F,"                             repeated: --filter='- .rsync-filter'\n");
 773   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
 774   rprintf(F,"     --exclude-from=FILE     read exclude patterns from FILE\n");
 775   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
 776   rprintf(F,"     --include-from=FILE     read include patterns from FILE\n");
 777   rprintf(F,"     --files-from=FILE       read list of source-file names from FILE\n");
 778   rprintf(F," -0, --from0                 all *-from/filter files are delimited by 0s\n");
 779   rprintf(F," -s, --protect-args          no space-splitting; only wildcard special-chars\n");
 780   rprintf(F,"     --address=ADDRESS       bind address for outgoing socket to daemon\n");
 781   rprintf(F,"     --port=PORT             specify double-colon alternate port number\n");
 782   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
 783   rprintf(F,"     --blocking-io           use blocking I/O for the remote shell\n");
 784   rprintf(F,"     --stats                 give some file-transfer stats\n");
 785   rprintf(F," -8, --8-bit-output          leave high-bit chars unescaped in output\n");
 786   rprintf(F," -h, --human-readable        output numbers in a human-readable format\n");
 787   rprintf(F,"     --progress              show progress during transfer\n");
 788   rprintf(F," -P                          same as --partial --progress\n");
 789   rprintf(F," -i, --itemize-changes       output a change-summary for all updates\n");
 790   rprintf(F,"     --out-format=FORMAT     output updates using the specified FORMAT\n");
 791   rprintf(F,"     --log-file=FILE         log what we're doing to the specified FILE\n");
 792   rprintf(F,"     --log-file-format=FMT   log updates using the specified FMT\n");
 793   rprintf(F,"     --password-file=FILE    read daemon-access password from FILE\n");
 794   rprintf(F,"     --list-only             list the files instead of copying them\n");
 795   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
 796 #ifdef HAVE_SETVBUF
 797   rprintf(F,"     --outbuf=N|L|B          set output buffering to None, Line, or Block\n");
 798 #endif
 799   rprintf(F,"     --write-batch=FILE      write a batched update to FILE\n");
 800   rprintf(F,"     --only-write-batch=FILE like --write-batch but w/o updating destination\n");
 801   rprintf(F,"     --read-batch=FILE       read a batched update from FILE\n");
 802   rprintf(F,"     --protocol=NUM          force an older protocol version to be used\n");
 803 #ifdef ICONV_OPTION
 804   rprintf(F,"     --iconv=CONVERT_SPEC    request charset conversion of filenames\n");
 805 #endif
 806   rprintf(F,"     --checksum-seed=NUM     set block/file checksum seed (advanced)\n");
 807   rprintf(F," -4, --ipv4                  prefer IPv4\n");
 808   rprintf(F," -6, --ipv6                  prefer IPv6\n");
 809   rprintf(F,"     --version               print version number\n");
 810   rprintf(F,"(-h) --help                  show this help (-h is --help only if used alone)\n");
 811
 812   rprintf(F,"\n");
 813   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
 814   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
 815   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
 816 }
 817
 818 enum {OPT_VERSION = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
 819       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
 820       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
 821       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
 822       OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, OPT_INFO, OPT_DEBUG,
 823       OPT_USERMAP, OPT_GROUPMAP, OPT_CHOWN, OPT_BWLIMIT,
 824       OPT_SERVER, OPT_REFUSED_BASE = 9000};
 825
 826 static struct poptOption long_options[] = {
 827   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 828   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
 829   {"version",          0,  POPT_ARG_NONE,   0, OPT_VERSION, 0, 0},
 830   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
 831   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 832   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 833   {"info",             0,  POPT_ARG_STRING, 0, OPT_INFO, 0, 0 },
 834   {"debug",            0,  POPT_ARG_STRING, 0, OPT_DEBUG, 0, 0 },
 835   {"msgs2stderr",      0,  POPT_ARG_NONE,   &msgs2stderr, 0, 0, 0 },
 836   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
 837   {"motd",             0,  POPT_ARG_VAL,    &output_motd, 1, 0, 0 },
 838   {"no-motd",          0,  POPT_ARG_VAL,    &output_motd, 0, 0, 0 },
 839   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
 840   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
 841   {"no-human-readable",0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 842   {"no-h",             0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 843   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
 844   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
 845   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
 846   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 847   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 848   {"inc-recursive",    0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 849   {"no-inc-recursive", 0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 850   {"i-r",              0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 851   {"no-i-r",           0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 852   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
 853   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 854   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 855   {"old-dirs",         0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 856   {"old-d",            0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 857   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
 858   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 859   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 860   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
 861   {"acls",            'A', POPT_ARG_NONE,   0, 'A', 0, 0 },
 862   {"no-acls",          0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 863   {"no-A",             0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 864   {"xattrs",          'X', POPT_ARG_NONE,   0, 'X', 0, 0 },
 865   {"no-xattrs",        0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 866   {"no-X",             0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 867   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
 868   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 869   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 870   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 1, 0, 0 },
 871   {"no-omit-dir-times",0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 872   {"no-O",             0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 873   {"omit-link-times", 'J', POPT_ARG_VAL,    &omit_link_times, 1, 0, 0 },
 874   {"no-omit-link-times",0, POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 875   {"no-J",             0,  POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 876   {"modify-window",   '@', POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
 877   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
 878   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
 879   {"fake-super",       0,  POPT_ARG_VAL,    &am_root, -1, 0, 0 },
 880   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
 881   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 882   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 883   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
 884   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 885   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 886   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
 887   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
 888   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
 889   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
 890   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
 891   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
 892   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
 893   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 894   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 895   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
 896   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
 897   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
 898   {"munge-links",      0,  POPT_ARG_VAL,    &munge_symlinks, 1, 0, 0 },
 899   {"no-munge-links",   0,  POPT_ARG_VAL,    &munge_symlinks, 0, 0, 0 },
 900   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
 901   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
 902   {"hard-links",      'H', POPT_ARG_NONE,   0, 'H', 0, 0 },
 903   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 904   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 905   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
 906   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 907   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 908   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 909   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 910   {"i-d",              0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 911   {"no-i-d",           0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 912   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
 913   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
 914   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
 915   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
 916   {"no-one-file-system",0, POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 917   {"no-x",             0,  POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 918   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
 919   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 920   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 921   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
 922   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
 923   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
 924   {"sparse",          'S', POPT_ARG_VAL,    &sparse_files, 1, 0, 0 },
 925   {"no-sparse",        0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 926   {"no-S",             0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 927   {"preallocate",      0,  POPT_ARG_NONE,   &preallocate_files, 0, 0, 0},
 928   {"inplace",          0,  POPT_ARG_VAL,    &inplace, 1, 0, 0 },
 929   {"no-inplace",       0,  POPT_ARG_VAL,    &inplace, 0, 0, 0 },
 930   {"append",           0,  POPT_ARG_NONE,   0, OPT_APPEND, 0, 0 },
 931   {"append-verify",    0,  POPT_ARG_VAL,    &append_mode, 2, 0, 0 },
 932   {"no-append",        0,  POPT_ARG_VAL,    &append_mode, 0, 0, 0 },
 933   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
 934   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
 935   {"delete-before",    0,  POPT_ARG_NONE,   &delete_before, 0, 0, 0 },
 936   {"delete-during",    0,  POPT_ARG_VAL,    &delete_during, 1, 0, 0 },
 937   {"delete-delay",     0,  POPT_ARG_VAL,    &delete_during, 2, 0, 0 },
 938   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
 939   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
 940   {"delete-missing-args",0,POPT_BIT_SET,    &missing_args, 2, 0, 0 },
 941   {"ignore-missing-args",0,POPT_BIT_SET,    &missing_args, 1, 0, 0 },
 942   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_source_files, 2, 0, 0 }, /* deprecated */
 943   {"remove-source-files",0,POPT_ARG_VAL,    &remove_source_files, 1, 0, 0 },
 944   {"force",            0,  POPT_ARG_VAL,    &force_delete, 1, 0, 0 },
 945   {"no-force",         0,  POPT_ARG_VAL,    &force_delete, 0, 0, 0 },
 946   {"ignore-errors",    0,  POPT_ARG_VAL,    &ignore_errors, 1, 0, 0 },
 947   {"no-ignore-errors", 0,  POPT_ARG_VAL,    &ignore_errors, 0, 0, 0 },
 948   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
 949   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
 950   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
 951   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
 952   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
 953   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
 954   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
 955   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
 956   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
 957   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 958   {"checksum-choice",  0,  POPT_ARG_STRING, &checksum_choice, 0, 0, 0 },
 959   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 960   {"checksum",        'c', POPT_ARG_VAL,    &always_checksum, 1, 0, 0 },
 961   {"no-checksum",      0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 962   {"no-c",             0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 963   {"block-size",      'B', POPT_ARG_LONG,   &block_size, 0, 0, 0 },
 964   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
 965   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
 966   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
 967   {"fuzzy",           'y', POPT_ARG_NONE,   0, 'y', 0, 0 },
 968   {"no-fuzzy",         0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 969   {"no-y",             0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 970   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
 971   {"old-compress",     0,  POPT_ARG_VAL,    &do_compression, 1, 0, 0 },
 972   {"new-compress",     0,  POPT_ARG_VAL,    &do_compression, 2, 0, 0 },
 973   {"no-compress",      0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
 974   {"no-z",             0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
 975   {"skip-compress",    0,  POPT_ARG_STRING, &skip_compress, 0, 0, 0 },
 976   {"compress-level",   0,  POPT_ARG_INT,    &def_compress_level, 0, 0, 0 },
 977   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
 978   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
 979   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
 980   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
 981   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
 982   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
 983   {"delay-updates",    0,  POPT_ARG_VAL,    &delay_updates, 1, 0, 0 },
 984   {"no-delay-updates", 0,  POPT_ARG_VAL,    &delay_updates, 0, 0, 0 },
 985   {"prune-empty-dirs",'m', POPT_ARG_VAL,    &prune_empty_dirs, 1, 0, 0 },
 986   {"no-prune-empty-dirs",0,POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
 987   {"no-m",             0,  POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
 988   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
 989   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
 990   {"out-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 },
 991   {"log-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 }, /* DEPRECATED */
 992   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
 993   {"no-itemize-changes",0, POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
 994   {"no-i",             0,  POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
 995   {"bwlimit",          0,  POPT_ARG_STRING, &bwlimit_arg, OPT_BWLIMIT, 0, 0 },
 996   {"no-bwlimit",       0,  POPT_ARG_VAL,    &bwlimit, 0, 0, 0 },
 997   {"backup",          'b', POPT_ARG_VAL,    &make_backups, 1, 0, 0 },
 998   {"no-backup",        0,  POPT_ARG_VAL,    &make_backups, 0, 0, 0 },
 999   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
1000   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
1001   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
1002   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
1003   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
1004   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
1005   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
1006   {"from0",           '0', POPT_ARG_VAL,    &eol_nulls, 1, 0, 0},
1007   {"no-from0",         0,  POPT_ARG_VAL,    &eol_nulls, 0, 0, 0},
1008   {"protect-args",    's', POPT_ARG_VAL,    &protect_args, 1, 0, 0},
1009   {"no-protect-args",  0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1010   {"no-s",             0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1011   {"numeric-ids",      0,  POPT_ARG_VAL,    &numeric_ids, 1, 0, 0 },
1012   {"no-numeric-ids",   0,  POPT_ARG_VAL,    &numeric_ids, 0, 0, 0 },
1013   {"usermap",          0,  POPT_ARG_STRING, 0, OPT_USERMAP, 0, 0 },
1014   {"groupmap",         0,  POPT_ARG_STRING, 0, OPT_GROUPMAP, 0, 0 },
1015   {"chown",            0,  POPT_ARG_STRING, 0, OPT_CHOWN, 0, 0 },
1016   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
1017   {"no-timeout",       0,  POPT_ARG_VAL,    &io_timeout, 0, 0, 0 },
1018   {"contimeout",       0,  POPT_ARG_INT,    &connect_timeout, 0, 0, 0 },
1019   {"no-contimeout",    0,  POPT_ARG_VAL,    &connect_timeout, 0, 0, 0 },
1020   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
1021   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
1022   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1023 #ifdef ICONV_OPTION
1024   {"iconv",            0,  POPT_ARG_STRING, &iconv_opt, 0, 0, 0 },
1025   {"no-iconv",         0,  POPT_ARG_NONE,   0, OPT_NO_ICONV, 0, 0 },
1026 #endif
1027   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1028   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1029   {"8-bit-output",    '8', POPT_ARG_VAL,    &allow_8bit_chars, 1, 0, 0 },
1030   {"no-8-bit-output",  0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1031   {"no-8",             0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1032   {"qsort",            0,  POPT_ARG_NONE,   &use_qsort, 0, 0, 0 },
1033   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1034   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1035   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1036   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
1037   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
1038   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
1039 #ifdef HAVE_SETVBUF
1040   {"outbuf",           0,  POPT_ARG_STRING, &outbuf_mode, 0, 0, 0 },
1041 #endif
1042   {"remote-option",   'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1043   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1044   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
1045   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
1046   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
1047   /* All the following options switch us into daemon-mode option-parsing. */
1048   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1049   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1050   {"dparam",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1051   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1052   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1053   {0,0,0,0, 0, 0, 0}
1054 };
1055
1056 static void daemon_usage(enum logcode F)
1057 {
1058   print_rsync_version(F);
1059
1060   rprintf(F,"\n");
1061   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
1062   rprintf(F,"     --address=ADDRESS       bind to the specified address\n");
1063   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
1064   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
1065   rprintf(F," -M, --dparam=OVERRIDE       override global daemon config parameter\n");
1066   rprintf(F,"     --no-detach             do not detach from the parent\n");
1067   rprintf(F,"     --port=PORT             listen on alternate port number\n");
1068   rprintf(F,"     --log-file=FILE         override the \"log file\" setting\n");
1069   rprintf(F,"     --log-file-format=FMT   override the \"log format\" setting\n");
1070   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
1071   rprintf(F," -v, --verbose               increase verbosity\n");
1072   rprintf(F," -4, --ipv4                  prefer IPv4\n");
1073   rprintf(F," -6, --ipv6                  prefer IPv6\n");
1074   rprintf(F,"     --help                  show this help screen\n");
1075
1076   rprintf(F,"\n");
1077   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
1078   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
1079 }
1080
1081 static struct poptOption long_daemon_options[] = {
1082   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
1083   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1084   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
1085   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
1086   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
1087   {"dparam",          'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1088   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1089   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1090   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
1091   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
1092   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
1093   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
1094   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1095   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1096   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1097   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
1098   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1099   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
1100   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1101   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1102   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
1103   {0,0,0,0, 0, 0, 0}
1104 };
1105
1106
1107 static char err_buf[200];
1108
1109
1110 /**
1111  * Store the option error message, if any, so that we can log the
1112  * connection attempt (which requires parsing the options), and then
1113  * show the error later on.
1114  **/
1115 void option_error(void)
1116 {
1117         if (!err_buf[0]) {
1118                 strlcpy(err_buf, "Error parsing options: option may "
1119                         "be supported on client but not on server?\n",
1120                         sizeof err_buf);
1121         }
1122
1123         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
1124         msleep(20);
1125 }
1126
1127
1128 /**
1129  * Tweak the option table to disable all options that the rsyncd.conf
1130  * file has told us to refuse.
1131  **/
1132 static void set_refuse_options(char *bp)
1133 {
1134         struct poptOption *op;
1135         char *cp, shortname[2];
1136         int is_wild, found_match;
1137
1138         shortname[1] = '\0';
1139
1140         while (1) {
1141                 while (*bp == ' ') bp++;
1142                 if (!*bp)
1143                         break;
1144                 if ((cp = strchr(bp, ' ')) != NULL)
1145                         *cp= '\0';
1146                 is_wild = strpbrk(bp, "*?[") != NULL;
1147                 found_match = 0;
1148                 for (op = long_options; ; op++) {
1149                         *shortname = op->shortName;
1150                         if (!op->longName && !*shortname)
1151                                 break;
1152                         if ((op->longName && wildmatch(bp, op->longName))
1153                             || (*shortname && wildmatch(bp, shortname))) {
1154                                 if (op->argInfo == POPT_ARG_VAL)
1155                                         op->argInfo = POPT_ARG_NONE;
1156                                 op->val = (op - long_options) + OPT_REFUSED_BASE;
1157                                 found_match = 1;
1158                                 /* These flags are set to let us easily check
1159                                  * an implied option later in the code. */
1160                                 switch (*shortname) {
1161                                 case 'r': case 'd': case 'l': case 'p':
1162                                 case 't': case 'g': case 'o': case 'D':
1163                                         refused_archive_part = op->val;
1164                                         break;
1165                                 case 'z':
1166                                         refused_compress = op->val;
1167                                         break;
1168                                 case '\0':
1169                                         if (wildmatch("delete", op->longName))
1170                                                 refused_delete = op->val;
1171                                         else if (wildmatch("delete-before", op->longName))
1172                                                 refused_delete_before = op->val;
1173                                         else if (wildmatch("delete-during", op->longName))
1174                                                 refused_delete_during = op->val;
1175                                         else if (wildmatch("partial", op->longName))
1176                                                 refused_partial = op->val;
1177                                         else if (wildmatch("progress", op->longName))
1178                                                 refused_progress = op->val;
1179                                         else if (wildmatch("inplace", op->longName))
1180                                                 refused_inplace = op->val;
1181                                         else if (wildmatch("no-iconv", op->longName))
1182                                                 refused_no_iconv = op->val;
1183                                         break;
1184                                 }
1185                                 if (!is_wild)
1186                                         break;
1187                         }
1188                 }
1189                 if (!found_match) {
1190                         rprintf(FLOG, "No match for refuse-options string \"%s\"\n",
1191                                 bp);
1192                 }
1193                 if (!cp)
1194                         break;
1195                 *cp = ' ';
1196                 bp = cp + 1;
1197         }
1198 }
1199
1200
1201 static int count_args(const char **argv)
1202 {
1203         int i = 0;
1204
1205         if (argv) {
1206                 while (argv[i] != NULL)
1207                         i++;
1208         }
1209
1210         return i;
1211 }
1212
1213
1214 static OFF_T parse_size_arg(char **size_arg, char def_suf)
1215 {
1216         int reps, mult, make_compatible = 0;
1217         const char *arg;
1218         OFF_T size = 1;
1219
1220         for (arg = *size_arg; isDigit(arg); arg++) {}
1221         if (*arg == '.')
1222                 for (arg++; isDigit(arg); arg++) {}
1223         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
1224         case 'b': case 'B':
1225                 reps = 0;
1226                 break;
1227         case 'k': case 'K':
1228                 reps = 1;
1229                 break;
1230         case 'm': case 'M':
1231                 reps = 2;
1232                 break;
1233         case 'g': case 'G':
1234                 reps = 3;
1235                 break;
1236         default:
1237                 return -1;
1238         }
1239         if (*arg == 'b' || *arg == 'B')
1240                 mult = 1000, make_compatible = 1, arg++;
1241         else if (!*arg || *arg == '+' || *arg == '-')
1242                 mult = 1024;
1243         else if (strncasecmp(arg, "ib", 2) == 0)
1244                 mult = 1024, arg += 2;
1245         else
1246                 return -1;
1247         while (reps--)
1248                 size *= mult;
1249         size *= atof(*size_arg);
1250         if ((*arg == '+' || *arg == '-') && arg[1] == '1')
1251                 size += atoi(arg), make_compatible = 1, arg += 2;
1252         if (*arg)
1253                 return -1;
1254         if (size > 0 && make_compatible && def_suf == 'b') {
1255                 /* We convert this manually because we may need %lld precision,
1256                  * and that's not a portable sprintf() escape. */
1257                 char buf[128], *s = buf + sizeof buf - 1;
1258                 OFF_T num = size;
1259                 *s = '\0';
1260                 while (num) {
1261                         *--s = (char)(num % 10) + '0';
1262                         num /= 10;
1263                 }
1264                 if (!(*size_arg = strdup(s)))
1265                         out_of_memory("parse_size_arg");
1266         }
1267         return size;
1268 }
1269
1270
1271 static void create_refuse_error(int which)
1272 {
1273         /* The "which" value is the index + OPT_REFUSED_BASE. */
1274         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
1275         int n = snprintf(err_buf, sizeof err_buf,
1276                          "The server is configured to refuse --%s\n",
1277                          op->longName) - 1;
1278         if (op->shortName) {
1279                 snprintf(err_buf + n, sizeof err_buf - n,
1280                          " (-%c)\n", op->shortName);
1281         }
1282 }
1283
1284 /* This is used to make sure that --daemon & --server cannot be aliased to
1285  * something else. These options have always disabled popt aliases for the
1286  * parsing of a daemon or server command-line, but we have to make sure that
1287  * these options cannot vanish so that the alias disabling can take effect. */
1288 static void popt_unalias(poptContext con, const char *opt)
1289 {
1290         struct poptAlias unalias;
1291
1292         unalias.longName = opt + 2; /* point past the leading "--" */
1293         unalias.shortName = '\0';
1294         unalias.argc = 1;
1295         unalias.argv = new_array(const char*, 1);
1296         unalias.argv[0] = strdup(opt);
1297
1298         poptAddAlias(con, unalias, 0);
1299 }
1300
1301 /**
1302  * Process command line arguments.  Called on both local and remote.
1303  *
1304  * @retval 1 if all options are OK; with globals set to appropriate
1305  * values
1306  *
1307  * @retval 0 on error, with err_buf containing an explanation
1308  **/
1309 int parse_arguments(int *argc_p, const char ***argv_p)
1310 {
1311         static poptContext pc;
1312         char *ref = lp_refuse_options(module_id);
1313         const char *arg, **argv = *argv_p;
1314         int argc = *argc_p;
1315         int opt;
1316         int orig_protect_args = protect_args;
1317
1318         if (ref && *ref)
1319                 set_refuse_options(ref);
1320         if (am_daemon) {
1321                 set_refuse_options("log-file*");
1322 #ifdef ICONV_OPTION
1323                 if (!*lp_charset(module_id))
1324                         set_refuse_options("iconv");
1325 #endif
1326         }
1327
1328 #ifdef ICONV_OPTION
1329         if (!am_daemon && protect_args <= 0 && (arg = getenv("RSYNC_ICONV")) != NULL && *arg)
1330                 iconv_opt = strdup(arg);
1331 #endif
1332
1333         /* TODO: Call poptReadDefaultConfig; handle errors. */
1334
1335         /* The context leaks in case of an error, but if there's a
1336          * problem we always exit anyhow. */
1337         if (pc)
1338                 poptFreeContext(pc);
1339         pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1340         if (!am_server) {
1341                 poptReadDefaultConfig(pc, 0);
1342                 popt_unalias(pc, "--daemon");
1343                 popt_unalias(pc, "--server");
1344         }
1345
1346         while ((opt = poptGetNextOpt(pc)) != -1) {
1347                 /* most options are handled automatically by popt;
1348                  * only special cases are returned and listed here. */
1349
1350                 switch (opt) {
1351                 case OPT_VERSION:
1352                         print_rsync_version(FINFO);
1353                         exit_cleanup(0);
1354
1355                 case OPT_SERVER:
1356                         if (!am_server) {
1357                                 /* Disable popt aliases on the server side and
1358                                  * then start parsing the options again. */
1359                                 poptFreeContext(pc);
1360                                 pc = poptGetContext(RSYNC_NAME, argc, argv,
1361                                                     long_options, 0);
1362                                 am_server = 1;
1363                         }
1364 #ifdef ICONV_OPTION
1365                         iconv_opt = NULL;
1366 #endif
1367                         break;
1368
1369                 case OPT_SENDER:
1370                         if (!am_server) {
1371                                 usage(FERROR);
1372                                 exit_cleanup(RERR_SYNTAX);
1373                         }
1374                         am_sender = 1;
1375                         break;
1376
1377                 case OPT_DAEMON:
1378                         if (am_daemon) {
1379                                 strlcpy(err_buf,
1380                                         "Attempt to hack rsync thwarted!\n",
1381                                         sizeof err_buf);
1382                                 return 0;
1383                         }
1384 #ifdef ICONV_OPTION
1385                         iconv_opt = NULL;
1386 #endif
1387                         protect_args = 0;
1388                         poptFreeContext(pc);
1389                         pc = poptGetContext(RSYNC_NAME, argc, argv,
1390                                             long_daemon_options, 0);
1391                         while ((opt = poptGetNextOpt(pc)) != -1) {
1392                                 char **cpp;
1393                                 switch (opt) {
1394                                 case 'h':
1395                                         daemon_usage(FINFO);
1396                                         exit_cleanup(0);
1397
1398                                 case 'M':
1399                                         arg = poptGetOptArg(pc);
1400                                         if (!strchr(arg, '=')) {
1401                                                 rprintf(FERROR,
1402                                                     "--dparam value is missing an '=': %s\n",
1403                                                     arg);
1404                                                 goto daemon_error;
1405                                         }
1406                                         cpp = EXPAND_ITEM_LIST(&dparam_list, char *, 4);
1407                                         *cpp = strdup(arg);
1408                                         break;
1409
1410                                 case 'v':
1411                                         verbose++;
1412                                         break;
1413
1414                                 default:
1415                                         rprintf(FERROR,
1416                                             "rsync: %s: %s (in daemon mode)\n",
1417                                             poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1418                                             poptStrerror(opt));
1419                                         goto daemon_error;
1420                                 }
1421                         }
1422
1423                         if (dparam_list.count && !set_dparams(1))
1424                                 exit_cleanup(RERR_SYNTAX);
1425
1426                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1427                                 snprintf(err_buf, sizeof err_buf,
1428                                          "the --temp-dir path is WAY too long.\n");
1429                                 return 0;
1430                         }
1431
1432                         if (!daemon_opt) {
1433                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
1434                             daemon_error:
1435                                 rprintf(FERROR,
1436                                     "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
1437                                 exit_cleanup(RERR_SYNTAX);
1438                         }
1439
1440                         *argv_p = argv = poptGetArgs(pc);
1441                         *argc_p = argc = count_args(argv);
1442                         am_starting_up = 0;
1443                         daemon_opt = 0;
1444                         am_daemon = 1;
1445                         return 1;
1446
1447                 case OPT_MODIFY_WINDOW:
1448                         /* The value has already been set by popt, but
1449                          * we need to remember that we're using a
1450                          * non-default setting. */
1451                         modify_window_set = 1;
1452                         break;
1453
1454                 case OPT_FILTER:
1455                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1456                                         rule_template(0), 0);
1457                         break;
1458
1459                 case OPT_EXCLUDE:
1460                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1461                                         rule_template(0), XFLG_OLD_PREFIXES);
1462                         break;
1463
1464                 case OPT_INCLUDE:
1465                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1466                                         rule_template(FILTRULE_INCLUDE), XFLG_OLD_PREFIXES);
1467                         break;
1468
1469                 case OPT_EXCLUDE_FROM:
1470                 case OPT_INCLUDE_FROM:
1471                         arg = poptGetOptArg(pc);
1472                         if (sanitize_paths)
1473                                 arg = sanitize_path(NULL, arg, NULL, 0, SP_DEFAULT);
1474                         if (daemon_filter_list.head) {
1475                                 int rej;
1476                                 char *cp = strdup(arg);
1477                                 if (!cp)
1478                                         out_of_memory("parse_arguments");
1479                                 if (!*cp)
1480                                         rej = 1;
1481                                 else {
1482                                         char *dir = cp + (*cp == '/' ? module_dirlen : 0);
1483                                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1484                                         rej = check_filter(&daemon_filter_list, FLOG, dir, 0) < 0;
1485                                 }
1486                                 free(cp);
1487                                 if (rej)
1488                                         goto options_rejected;
1489                         }
1490                         parse_filter_file(&filter_list, arg,
1491                                 rule_template(opt == OPT_INCLUDE_FROM ? FILTRULE_INCLUDE : 0),
1492                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
1493                         break;
1494
1495                 case 'a':
1496                         if (refused_archive_part) {
1497                                 create_refuse_error(refused_archive_part);
1498                                 return 0;
1499                         }
1500                         if (!recurse) /* preserve recurse == 2 */
1501                                 recurse = 1;
1502 #ifdef SUPPORT_LINKS
1503                         preserve_links = 1;
1504 #endif
1505                         preserve_perms = 1;
1506                         preserve_times = 1;
1507                         preserve_gid = 1;
1508                         preserve_uid = 1;
1509                         preserve_devices = 1;
1510                         preserve_specials = 1;
1511                         break;
1512
1513                 case 'D':
1514                         preserve_devices = preserve_specials = 1;
1515                         break;
1516
1517                 case OPT_NO_D:
1518                         preserve_devices = preserve_specials = 0;
1519                         break;
1520
1521                 case 'h':
1522                         human_readable++;
1523                         break;
1524
1525                 case 'H':
1526                         preserve_hard_links++;
1527                         break;
1528
1529                 case 'i':
1530                         itemize_changes++;
1531                         break;
1532
1533                 case 'v':
1534                         verbose++;
1535                         break;
1536
1537                 case 'y':
1538                         fuzzy_basis++;
1539                         break;
1540
1541                 case 'q':
1542                         quiet++;
1543                         break;
1544
1545                 case 'x':
1546                         one_file_system++;
1547                         break;
1548
1549                 case 'F':
1550                         switch (++F_option_cnt) {
1551                         case 1:
1552                                 parse_filter_str(&filter_list,": /.rsync-filter",rule_template(0),0);
1553                                 break;
1554                         case 2:
1555                                 parse_filter_str(&filter_list,"- .rsync-filter",rule_template(0),0);
1556                                 break;
1557                         }
1558                         break;
1559
1560                 case 'P':
1561                         if (refused_partial || refused_progress) {
1562                                 create_refuse_error(refused_partial
1563                                     ? refused_partial : refused_progress);
1564                                 return 0;
1565                         }
1566                         do_progress = 1;
1567                         keep_partial = 1;
1568                         break;
1569
1570                 case 'z':
1571                         do_compression++;
1572                         break;
1573
1574                 case 'M':
1575                         arg = poptGetOptArg(pc);
1576                         if (*arg != '-') {
1577                                 snprintf(err_buf, sizeof err_buf,
1578                                         "Remote option must start with a dash: %s\n", arg);
1579                                 return 0;
1580                         }
1581                         if (remote_option_cnt+2 >= remote_option_alloc) {
1582                                 remote_option_alloc += 16;
1583                                 remote_options = realloc_array(remote_options,
1584                                                         const char *, remote_option_alloc);
1585                                 if (!remote_options)
1586                                         out_of_memory("parse_arguments");
1587                                 if (!remote_option_cnt)
1588                                         remote_options[0] = "ARG0";
1589                         }
1590                         remote_options[++remote_option_cnt] = arg;
1591                         remote_options[remote_option_cnt+1] = NULL;
1592                         break;
1593
1594                 case OPT_WRITE_BATCH:
1595                         /* batch_name is already set */
1596                         write_batch = 1;
1597                         break;
1598
1599                 case OPT_ONLY_WRITE_BATCH:
1600                         /* batch_name is already set */
1601                         write_batch = -1;
1602                         break;
1603
1604                 case OPT_READ_BATCH:
1605                         /* batch_name is already set */
1606                         read_batch = 1;
1607                         break;
1608
1609                 case OPT_NO_ICONV:
1610 #ifdef ICONV_OPTION
1611                         iconv_opt = NULL;
1612 #endif
1613                         break;
1614
1615                 case OPT_MAX_SIZE:
1616                         if ((max_size = parse_size_arg(&max_size_arg, 'b')) < 0) {
1617                                 snprintf(err_buf, sizeof err_buf,
1618                                         "--max-size value is invalid: %s\n",
1619                                         max_size_arg);
1620                                 return 0;
1621                         }
1622                         break;
1623
1624                 case OPT_MIN_SIZE:
1625                         if ((min_size = parse_size_arg(&min_size_arg, 'b')) < 0) {
1626                                 snprintf(err_buf, sizeof err_buf,
1627                                         "--min-size value is invalid: %s\n",
1628                                         min_size_arg);
1629                                 return 0;
1630                         }
1631                         break;
1632
1633                 case OPT_BWLIMIT:
1634                         {
1635                                 OFF_T limit = parse_size_arg(&bwlimit_arg, 'K');
1636                                 if (limit < 0) {
1637                                         snprintf(err_buf, sizeof err_buf,
1638                                                 "--bwlimit value is invalid: %s\n", bwlimit_arg);
1639                                         return 0;
1640                                 }
1641                                 bwlimit = (limit + 512) / 1024;
1642                                 if (limit && !bwlimit) {
1643                                         snprintf(err_buf, sizeof err_buf,
1644                                                 "--bwlimit value is too small: %s\n", bwlimit_arg);
1645                                         return 0;
1646                                 }
1647                         }
1648                         break;
1649
1650                 case OPT_APPEND:
1651                         if (am_server)
1652                                 append_mode++;
1653                         else
1654                                 append_mode = 1;
1655                         break;
1656
1657                 case OPT_LINK_DEST:
1658 #ifdef SUPPORT_HARD_LINKS
1659                         link_dest = 1;
1660                         dest_option = "--link-dest";
1661                         goto set_dest_dir;
1662 #else
1663                         snprintf(err_buf, sizeof err_buf,
1664                                  "hard links are not supported on this %s\n",
1665                                  am_server ? "server" : "client");
1666                         return 0;
1667 #endif
1668
1669                 case OPT_COPY_DEST:
1670                         copy_dest = 1;
1671                         dest_option = "--copy-dest";
1672                         goto set_dest_dir;
1673
1674                 case OPT_COMPARE_DEST:
1675                         compare_dest = 1;
1676                         dest_option = "--compare-dest";
1677                 set_dest_dir:
1678                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1679                                 snprintf(err_buf, sizeof err_buf,
1680                                         "ERROR: at most %d %s args may be specified\n",
1681                                         MAX_BASIS_DIRS, dest_option);
1682                                 return 0;
1683                         }
1684                         /* We defer sanitizing this arg until we know what
1685                          * our destination directory is going to be. */
1686                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1687                         break;
1688
1689                 case OPT_CHMOD:
1690                         arg = poptGetOptArg(pc);
1691                         if (!parse_chmod(arg, &chmod_modes)) {
1692                                 snprintf(err_buf, sizeof err_buf,
1693                                     "Invalid argument passed to --chmod (%s)\n",
1694                                     arg);
1695                                 return 0;
1696                         }
1697                         break;
1698
1699                 case OPT_INFO:
1700                         arg = poptGetOptArg(pc);
1701                         parse_output_words(info_words, info_levels, arg, USER_PRIORITY);
1702                         break;
1703
1704                 case OPT_DEBUG:
1705                         arg = poptGetOptArg(pc);
1706                         parse_output_words(debug_words, debug_levels, arg, USER_PRIORITY);
1707                         break;
1708
1709                 case OPT_USERMAP:
1710                         if (usermap) {
1711                                 if (usermap_via_chown) {
1712                                         snprintf(err_buf, sizeof err_buf,
1713                                             "--usermap conflicts with prior --chown.\n");
1714                                         return 0;
1715                                 }
1716                                 snprintf(err_buf, sizeof err_buf,
1717                                     "You can only specify --usermap once.\n");
1718                                 return 0;
1719                         }
1720                         usermap = (char *)poptGetOptArg(pc);
1721                         usermap_via_chown = False;
1722                         break;
1723
1724                 case OPT_GROUPMAP:
1725                         if (groupmap) {
1726                                 if (groupmap_via_chown) {
1727                                         snprintf(err_buf, sizeof err_buf,
1728                                             "--groupmap conflicts with prior --chown.\n");
1729                                         return 0;
1730                                 }
1731                                 snprintf(err_buf, sizeof err_buf,
1732                                     "You can only specify --groupmap once.\n");
1733                                 return 0;
1734                         }
1735                         groupmap = (char *)poptGetOptArg(pc);
1736                         groupmap_via_chown = False;
1737                         break;
1738
1739                 case OPT_CHOWN: {
1740                         const char *chown = poptGetOptArg(pc);
1741                         int len;
1742                         if ((arg = strchr(chown, ':')) != NULL)
1743                                 len = arg++ - chown;
1744                         else
1745                                 len = strlen(chown);
1746                         if (len) {
1747                                 if (usermap) {
1748                                         if (!usermap_via_chown) {
1749                                                 snprintf(err_buf, sizeof err_buf,
1750                                                     "--chown conflicts with prior --usermap.\n");
1751                                                 return 0;
1752                                         }
1753                                         snprintf(err_buf, sizeof err_buf,
1754                                             "You can only specify a user-affecting --chown once.\n");
1755                                         return 0;
1756                                 }
1757                                 if (asprintf(&usermap, "*:%.*s", len, chown) < 0)
1758                                         out_of_memory("parse_arguments");
1759                                 usermap_via_chown = True;
1760                         }
1761                         if (arg && *arg) {
1762                                 if (groupmap) {
1763                                         if (!groupmap_via_chown) {
1764                                                 snprintf(err_buf, sizeof err_buf,
1765                                                     "--chown conflicts with prior --groupmap.\n");
1766                                                 return 0;
1767                                         }
1768                                         snprintf(err_buf, sizeof err_buf,
1769                                             "You can only specify a group-affecting --chown once.\n");
1770                                         return 0;
1771                                 }
1772                                 if (asprintf(&groupmap, "*:%s", arg) < 0)
1773                                         out_of_memory("parse_arguments");
1774                                 groupmap_via_chown = True;
1775                         }
1776                         break;
1777                 }
1778
1779                 case OPT_HELP:
1780                         usage(FINFO);
1781                         exit_cleanup(0);
1782
1783                 case 'A':
1784 #ifdef SUPPORT_ACLS
1785                         preserve_acls = 1;
1786                         preserve_perms = 1;
1787                         break;
1788 #else
1789                         /* FIXME: this should probably be ignored with a
1790                          * warning and then countermeasures taken to
1791                          * restrict group and other access in the presence
1792                          * of any more restrictive ACLs, but this is safe
1793                          * for now */
1794                         snprintf(err_buf,sizeof(err_buf),
1795                                  "ACLs are not supported on this %s\n",
1796                                  am_server ? "server" : "client");
1797                         return 0;
1798 #endif
1799
1800                 case 'X':
1801 #ifdef SUPPORT_XATTRS
1802                         preserve_xattrs++;
1803                         break;
1804 #else
1805                         snprintf(err_buf,sizeof(err_buf),
1806                                  "extended attributes are not supported on this %s\n",
1807                                  am_server ? "server" : "client");
1808                         return 0;
1809 #endif
1810
1811                 default:
1812                         /* A large opt value means that set_refuse_options()
1813                          * turned this option off. */
1814                         if (opt >= OPT_REFUSED_BASE) {
1815                                 create_refuse_error(opt);
1816                                 return 0;
1817                         }
1818                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
1819                                  am_server ? "on remote machine: " : "",
1820                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1821                                  poptStrerror(opt));
1822                         return 0;
1823                 }
1824         }
1825
1826         if (protect_args < 0) {
1827                 if (am_server)
1828                         protect_args = 0;
1829                 else if ((arg = getenv("RSYNC_PROTECT_ARGS")) != NULL && *arg)
1830                         protect_args = atoi(arg) ? 1 : 0;
1831                 else {
1832 #ifdef RSYNC_USE_PROTECTED_ARGS
1833                         protect_args = 1;
1834 #else
1835                         protect_args = 0;
1836 #endif
1837                 }
1838         }
1839
1840         if (checksum_choice && strcmp(checksum_choice, "auto") != 0 && strcmp(checksum_choice, "auto,auto") != 0) {
1841                 /* Call this early to verify the args and figure out if we need to force
1842                  * --whole-file. Note that the parse function will get called again later,
1843                  * just in case an "auto" choice needs to know the protocol_version. */
1844                 if (parse_checksum_choice())
1845                         whole_file = 1;
1846         } else
1847                 checksum_choice = NULL;
1848
1849         if (human_readable > 1 && argc == 2 && !am_server) {
1850                 /* Allow the old meaning of 'h' (--help) on its own. */
1851                 usage(FINFO);
1852                 exit_cleanup(0);
1853         }
1854
1855         if (do_compression || def_compress_level != NOT_SPECIFIED) {
1856                 if (def_compress_level == NOT_SPECIFIED)
1857                         def_compress_level = Z_DEFAULT_COMPRESSION;
1858                 else if (def_compress_level < Z_DEFAULT_COMPRESSION || def_compress_level > Z_BEST_COMPRESSION) {
1859                         snprintf(err_buf, sizeof err_buf, "--compress-level value is invalid: %d\n",
1860                                  def_compress_level);
1861                         return 0;
1862                 } else if (def_compress_level == Z_NO_COMPRESSION)
1863                         do_compression = 0;
1864                 else if (!do_compression)
1865                         do_compression = 1;
1866                 if (do_compression && refused_compress) {
1867                         create_refuse_error(refused_compress);
1868                         return 0;
1869                 }
1870 #ifdef EXTERNAL_ZLIB
1871                 if (do_compression == 1) {
1872                         snprintf(err_buf, sizeof err_buf,
1873                                 "This rsync lacks old-style --compress due to its external zlib.  Try -zz.\n");
1874                         if (am_server)
1875                                 return 0;
1876                         fprintf(stderr, "%s" "Continuing without compression.\n\n", err_buf);
1877                         do_compression = 0;
1878                 }
1879 #endif
1880         }
1881
1882 #ifdef HAVE_SETVBUF
1883         if (outbuf_mode && !am_server) {
1884                 int mode = *(uchar *)outbuf_mode;
1885                 if (islower(mode))
1886                         mode = toupper(mode);
1887                 fflush(stdout); /* Just in case... */
1888                 switch (mode) {
1889                 case 'N': /* None */
1890                 case 'U': /* Unbuffered */
1891                         mode = _IONBF;
1892                         break;
1893                 case 'L': /* Line */
1894                         mode = _IOLBF;
1895                         break;
1896                 case 'B': /* Block */
1897                 case 'F': /* Full */
1898                         mode = _IOFBF;
1899                         break;
1900                 default:
1901                         snprintf(err_buf, sizeof err_buf,
1902                                 "Invalid --outbuf setting -- specify N, L, or B.\n");
1903                         return 0;
1904                 }
1905                 setvbuf(stdout, (char *)NULL, mode, 0);
1906         }
1907
1908         if (msgs2stderr) {
1909                 /* Make stderr line buffered for better sharing of the stream. */
1910                 fflush(stderr); /* Just in case... */
1911                 setvbuf(stderr, (char *)NULL, _IOLBF, 0);
1912         }
1913 #endif
1914
1915         set_output_verbosity(verbose, DEFAULT_PRIORITY);
1916
1917         if (do_stats) {
1918                 parse_output_words(info_words, info_levels,
1919                         verbose > 1 ? "stats3" : "stats2", DEFAULT_PRIORITY);
1920         }
1921
1922 #ifdef ICONV_OPTION
1923         if (iconv_opt && protect_args != 2) {
1924                 if (!am_server && strcmp(iconv_opt, "-") == 0)
1925                         iconv_opt = NULL;
1926                 else
1927                         need_unsorted_flist = 1;
1928         }
1929         if (refused_no_iconv && !iconv_opt) {
1930                 create_refuse_error(refused_no_iconv);
1931                 return 0;
1932         }
1933 #endif
1934
1935         if (fuzzy_basis > 1)
1936                 fuzzy_basis = basis_dir_cnt + 1;
1937
1938         /* Don't let the client reset protect_args if it was already processed */
1939         if (orig_protect_args == 2 && am_server)
1940                 protect_args = orig_protect_args;
1941
1942         if (protect_args == 1 && am_server)
1943                 return 1;
1944
1945         *argv_p = argv = poptGetArgs(pc);
1946         *argc_p = argc = count_args(argv);
1947
1948 #ifndef SUPPORT_LINKS
1949         if (preserve_links && !am_sender) {
1950                 snprintf(err_buf, sizeof err_buf,
1951                          "symlinks are not supported on this %s\n",
1952                          am_server ? "server" : "client");
1953                 return 0;
1954         }
1955 #endif
1956
1957 #ifndef SUPPORT_HARD_LINKS
1958         if (preserve_hard_links) {
1959                 snprintf(err_buf, sizeof err_buf,
1960                          "hard links are not supported on this %s\n",
1961                          am_server ? "server" : "client");
1962                 return 0;
1963         }
1964 #endif
1965
1966 #ifdef SUPPORT_XATTRS
1967         if (am_root < 0 && preserve_xattrs > 1) {
1968                 snprintf(err_buf, sizeof err_buf,
1969                          "--fake-super conflicts with -XX\n");
1970                 return 0;
1971         }
1972 #else
1973         if (am_root < 0) {
1974                 snprintf(err_buf, sizeof err_buf,
1975                          "--fake-super requires an rsync with extended attributes enabled\n");
1976                 return 0;
1977         }
1978 #endif
1979
1980         if (block_size > MAX_BLOCK_SIZE) {
1981                 snprintf(err_buf, sizeof err_buf,
1982                          "--block-size=%lu is too large (max: %u)\n", block_size, MAX_BLOCK_SIZE);
1983                 return 0;
1984         }
1985
1986         if (write_batch && read_batch) {
1987                 snprintf(err_buf, sizeof err_buf,
1988                         "--write-batch and --read-batch can not be used together\n");
1989                 return 0;
1990         }
1991         if (write_batch > 0 || read_batch) {
1992                 if (am_server) {
1993                         rprintf(FINFO,
1994                                 "ignoring --%s-batch option sent to server\n",
1995                                 write_batch ? "write" : "read");
1996                         /* We don't actually exit_cleanup(), so that we can
1997                          * still service older version clients that still send
1998                          * batch args to server. */
1999                         read_batch = write_batch = 0;
2000                         batch_name = NULL;
2001                 } else if (dry_run)
2002                         write_batch = 0;
2003         } else if (write_batch < 0 && dry_run)
2004                 write_batch = 0;
2005         if (read_batch && files_from) {
2006                 snprintf(err_buf, sizeof err_buf,
2007                         "--read-batch cannot be used with --files-from\n");
2008                 return 0;
2009         }
2010         if (read_batch && remove_source_files) {
2011                 snprintf(err_buf, sizeof err_buf,
2012                         "--read-batch cannot be used with --remove-%s-files\n",
2013                         remove_source_files == 1 ? "source" : "sent");
2014                 return 0;
2015         }
2016         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
2017                 snprintf(err_buf, sizeof err_buf,
2018                         "the batch-file name must be %d characters or less.\n",
2019                         MAX_BATCH_NAME_LEN);
2020                 return 0;
2021         }
2022
2023         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
2024                 snprintf(err_buf, sizeof err_buf,
2025                          "the --temp-dir path is WAY too long.\n");
2026                 return 0;
2027         }
2028
2029         if (max_delete < 0 && max_delete != INT_MIN) {
2030                 /* Negative numbers are treated as "no deletions". */
2031                 max_delete = 0;
2032         }
2033
2034         if (compare_dest + copy_dest + link_dest > 1) {
2035                 snprintf(err_buf, sizeof err_buf,
2036                         "You may not mix --compare-dest, --copy-dest, and --link-dest.\n");
2037                 return 0;
2038         }
2039
2040         if (files_from) {
2041                 if (recurse == 1) /* preserve recurse == 2 */
2042                         recurse = 0;
2043                 if (xfer_dirs < 0)
2044                         xfer_dirs = 1;
2045         }
2046
2047         if (argc < 2 && !read_batch && !am_server)
2048                 list_only |= 1;
2049
2050         if (xfer_dirs >= 4) {
2051                 parse_filter_str(&filter_list, "- /*/*", rule_template(0), 0);
2052                 recurse = xfer_dirs = 1;
2053         } else if (recurse)
2054                 xfer_dirs = 1;
2055         else if (xfer_dirs < 0)
2056                 xfer_dirs = list_only ? 1 : 0;
2057
2058         if (relative_paths < 0)
2059                 relative_paths = files_from? 1 : 0;
2060         if (!relative_paths)
2061                 implied_dirs = 0;
2062
2063         if (delete_before + !!delete_during + delete_after > 1) {
2064                 snprintf(err_buf, sizeof err_buf,
2065                         "You may not combine multiple --delete-WHEN options.\n");
2066                 return 0;
2067         }
2068         if (delete_before || delete_during || delete_after)
2069                 delete_mode = 1;
2070         else if (delete_mode || delete_excluded) {
2071                 /* Only choose now between before & during if one is refused. */
2072                 if (refused_delete_before) {
2073                         if (!refused_delete_during)
2074                                 delete_during = 1;
2075                         else {
2076                                 create_refuse_error(refused_delete_before);
2077                                 return 0;
2078                         }
2079                 } else if (refused_delete_during)
2080                         delete_before = 1;
2081                 delete_mode = 1;
2082         }
2083         if (!xfer_dirs && delete_mode) {
2084                 snprintf(err_buf, sizeof err_buf,
2085                         "--delete does not work without --recursive (-r) or --dirs (-d).\n");
2086                 return 0;
2087         }
2088
2089         if (missing_args == 3) /* simplify if both options were specified */
2090                 missing_args = 2;
2091         if (refused_delete && (delete_mode || missing_args == 2)) {
2092                 create_refuse_error(refused_delete);
2093                 return 0;
2094         }
2095
2096         if (remove_source_files) {
2097                 /* We only want to infer this refusal of --remove-source-files
2098                  * via the refusal of "delete", not any of the "delete-FOO"
2099                  * options. */
2100                 if (refused_delete && am_sender) {
2101                         create_refuse_error(refused_delete);
2102                         return 0;
2103                 }
2104                 need_messages_from_generator = 1;
2105         }
2106
2107         if (munge_symlinks && !am_daemon) {
2108                 STRUCT_STAT st;
2109                 char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */
2110                 strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */
2111                 if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) {
2112                         rprintf(FERROR, "Symlink munging is unsafe when a %s directory exists.\n",
2113                                 prefix);
2114                         exit_cleanup(RERR_UNSUPPORTED);
2115                 }
2116         }
2117
2118         if (sanitize_paths) {
2119                 int i;
2120                 for (i = argc; i-- > 0; )
2121                         argv[i] = sanitize_path(NULL, argv[i], "", 0, SP_KEEP_DOT_DIRS);
2122                 if (tmpdir)
2123                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, SP_DEFAULT);
2124                 if (backup_dir)
2125                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, SP_DEFAULT);
2126         }
2127         if (daemon_filter_list.head && !am_sender) {
2128                 filter_rule_list *elp = &daemon_filter_list;
2129                 if (tmpdir) {
2130                         char *dir;
2131                         if (!*tmpdir)
2132                                 goto options_rejected;
2133                         dir = tmpdir + (*tmpdir == '/' ? module_dirlen : 0);
2134                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2135                         if (check_filter(elp, FLOG, dir, 1) < 0)
2136                                 goto options_rejected;
2137                 }
2138                 if (backup_dir) {
2139                         char *dir;
2140                         if (!*backup_dir)
2141                                 goto options_rejected;
2142                         dir = backup_dir + (*backup_dir == '/' ? module_dirlen : 0);
2143                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2144                         if (check_filter(elp, FLOG, dir, 1) < 0)
2145                                 goto options_rejected;
2146                 }
2147         }
2148
2149         if (!backup_suffix)
2150                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
2151         backup_suffix_len = strlen(backup_suffix);
2152         if (strchr(backup_suffix, '/') != NULL) {
2153                 snprintf(err_buf, sizeof err_buf,
2154                         "--suffix cannot contain slashes: %s\n",
2155                         backup_suffix);
2156                 return 0;
2157         }
2158         if (backup_dir) {
2159                 size_t len;
2160                 while (*backup_dir == '.' && backup_dir[1] == '/')
2161                         backup_dir += 2;
2162                 if (*backup_dir == '.' && backup_dir[1] == '\0')
2163                         backup_dir++;
2164                 len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
2165                 if (len > sizeof backup_dir_buf - 128) {
2166                         snprintf(err_buf, sizeof err_buf,
2167                                 "the --backup-dir path is WAY too long.\n");
2168                         return 0;
2169                 }
2170                 backup_dir_len = (int)len;
2171                 if (!backup_dir_len) {
2172                         backup_dir_len = -1;
2173                         backup_dir = NULL;
2174                 } else if (backup_dir_buf[backup_dir_len - 1] != '/') {
2175                         backup_dir_buf[backup_dir_len++] = '/';
2176                         backup_dir_buf[backup_dir_len] = '\0';
2177                 }
2178                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
2179         }
2180         if (backup_dir) {
2181                 /* No need for a suffix or a protect rule. */
2182         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
2183                 snprintf(err_buf, sizeof err_buf,
2184                         "--suffix cannot be empty %s\n", backup_dir_len < 0
2185                         ? "when --backup-dir is the same as the dest dir"
2186                         : "without a --backup-dir");
2187                 return 0;
2188         } else if (make_backups && delete_mode && !delete_excluded && !am_server) {
2189                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
2190                         "P *%s", backup_suffix);
2191                 parse_filter_str(&filter_list, backup_dir_buf, rule_template(0), 0);
2192         }
2193
2194         if (preserve_times) {
2195                 preserve_times = PRESERVE_FILE_TIMES;
2196                 if (!omit_dir_times)
2197                         preserve_times |= PRESERVE_DIR_TIMES;
2198 #ifdef CAN_SET_SYMLINK_TIMES
2199                 if (!omit_link_times)
2200                         preserve_times |= PRESERVE_LINK_TIMES;
2201 #endif
2202         }
2203
2204         if (make_backups && !backup_dir) {
2205                 omit_dir_times = 0; /* Implied, so avoid -O to sender. */
2206                 preserve_times &= ~PRESERVE_DIR_TIMES;
2207         }
2208
2209         if (stdout_format) {
2210                 if (am_server && log_format_has(stdout_format, 'I'))
2211                         stdout_format_has_i = 2;
2212                 else if (log_format_has(stdout_format, 'i'))
2213                         stdout_format_has_i = itemize_changes | 1;
2214                 if (!log_format_has(stdout_format, 'b')
2215                  && !log_format_has(stdout_format, 'c')
2216                  && !log_format_has(stdout_format, 'C'))
2217                         log_before_transfer = !am_server;
2218         } else if (itemize_changes) {
2219                 stdout_format = "%i %n%L";
2220                 stdout_format_has_i = itemize_changes;
2221                 log_before_transfer = !am_server;
2222         }
2223
2224         if (do_progress && !am_server) {
2225                 if (!log_before_transfer && INFO_EQ(NAME, 0))
2226                         parse_output_words(info_words, info_levels, "name", DEFAULT_PRIORITY);
2227                 parse_output_words(info_words, info_levels, "flist2,progress", DEFAULT_PRIORITY);
2228         }
2229
2230         if (dry_run)
2231                 do_xfers = 0;
2232
2233         set_io_timeout(io_timeout);
2234
2235         if (INFO_GTE(NAME, 1) && !stdout_format) {
2236                 stdout_format = "%n%L";
2237                 log_before_transfer = !am_server;
2238         }
2239         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
2240                 stdout_format_has_o_or_i = 1;
2241
2242         if (logfile_name && !am_daemon) {
2243                 if (!logfile_format) {
2244                         logfile_format = "%i %n%L";
2245                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
2246                 } else {
2247                         if (log_format_has(logfile_format, 'i'))
2248                                 logfile_format_has_i = 1;
2249                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
2250                                 logfile_format_has_o_or_i = 1;
2251                 }
2252                 log_init(0);
2253         } else if (!am_daemon)
2254                 logfile_format = NULL;
2255
2256         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
2257                 bwlimit = daemon_bwlimit;
2258         if (bwlimit) {
2259                 bwlimit_writemax = (size_t)bwlimit * 128;
2260                 if (bwlimit_writemax < 512)
2261                         bwlimit_writemax = 512;
2262         }
2263
2264         if (append_mode) {
2265                 if (whole_file > 0) {
2266                         snprintf(err_buf, sizeof err_buf,
2267                                  "--append cannot be used with --whole-file\n");
2268                         return 0;
2269                 }
2270                 if (refused_inplace) {
2271                         create_refuse_error(refused_inplace);
2272                         return 0;
2273                 }
2274                 inplace = 1;
2275         }
2276
2277         if (delay_updates && !partial_dir)
2278                 partial_dir = tmp_partialdir;
2279
2280         if (inplace) {
2281 #ifdef HAVE_FTRUNCATE
2282                 if (partial_dir) {
2283                         snprintf(err_buf, sizeof err_buf,
2284                                  "--%s cannot be used with --%s\n",
2285                                  append_mode ? "append" : "inplace",
2286                                  delay_updates ? "delay-updates" : "partial-dir");
2287                         return 0;
2288                 }
2289                 /* --inplace implies --partial for refusal purposes, but we
2290                  * clear the keep_partial flag for internal logic purposes. */
2291                 if (refused_partial) {
2292                         create_refuse_error(refused_partial);
2293                         return 0;
2294                 }
2295                 keep_partial = 0;
2296 #else
2297                 snprintf(err_buf, sizeof err_buf,
2298                          "--%s is not supported on this %s\n",
2299                          append_mode ? "append" : "inplace",
2300                          am_server ? "server" : "client");
2301                 return 0;
2302 #endif
2303         } else {
2304                 if (keep_partial && !partial_dir && !am_server) {
2305                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
2306                                 partial_dir = strdup(arg);
2307                 }
2308                 if (partial_dir) {
2309                         if (*partial_dir)
2310                                 clean_fname(partial_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2311                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
2312                                 partial_dir = NULL;
2313                         if (!partial_dir && refused_partial) {
2314                                 create_refuse_error(refused_partial);
2315                                 return 0;
2316                         }
2317                         keep_partial = 1;
2318                 }
2319         }
2320
2321         if (files_from) {
2322                 char *h, *p;
2323                 int q;
2324                 if (argc > 2 || (!am_daemon && !am_server && argc == 1)) {
2325                         usage(FERROR);
2326                         exit_cleanup(RERR_SYNTAX);
2327                 }
2328                 if (strcmp(files_from, "-") == 0) {
2329                         filesfrom_fd = 0;
2330                         if (am_server)
2331                                 filesfrom_host = ""; /* reading from socket */
2332                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
2333                         if (am_server) {
2334                                 snprintf(err_buf, sizeof err_buf,
2335                                         "The --files-from sent to the server cannot specify a host.\n");
2336                                 return 0;
2337                         }
2338                         files_from = p;
2339                         filesfrom_host = h;
2340                         if (strcmp(files_from, "-") == 0) {
2341                                 snprintf(err_buf, sizeof err_buf,
2342                                         "Invalid --files-from remote filename\n");
2343                                 return 0;
2344                         }
2345                 } else {
2346                         if (sanitize_paths)
2347                                 files_from = sanitize_path(NULL, files_from, NULL, 0, SP_DEFAULT);
2348                         if (daemon_filter_list.head) {
2349                                 char *dir;
2350                                 if (!*files_from)
2351                                         goto options_rejected;
2352                                 dir = files_from + (*files_from == '/' ? module_dirlen : 0);
2353                                 clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2354                                 if (check_filter(&daemon_filter_list, FLOG, dir, 0) < 0)
2355                                         goto options_rejected;
2356                         }
2357                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
2358                         if (filesfrom_fd < 0) {
2359                                 snprintf(err_buf, sizeof err_buf,
2360                                         "failed to open files-from file %s: %s\n",
2361                                         files_from, strerror(errno));
2362                                 return 0;
2363                         }
2364                 }
2365         }
2366
2367         am_starting_up = 0;
2368
2369         return 1;
2370
2371   options_rejected:
2372         snprintf(err_buf, sizeof err_buf,
2373                 "Your options have been rejected by the server.\n");
2374         return 0;
2375 }
2376
2377
2378 /**
2379  * Construct a filtered list of options to pass through from the
2380  * client to the server.
2381  *
2382  * This involves setting options that will tell the server how to
2383  * behave, and also filtering out options that are processed only
2384  * locally.
2385  **/
2386 void server_options(char **args, int *argc_p)
2387 {
2388         static char argstr[64];
2389         int ac = *argc_p;
2390         uchar where;
2391         char *arg;
2392         int i, x;
2393
2394         /* This should always remain first on the server's command-line. */
2395         args[ac++] = "--server";
2396
2397         if (daemon_over_rsh > 0) {
2398                 args[ac++] = "--daemon";
2399                 *argc_p = ac;
2400                 /* if we're passing --daemon, we're done */
2401                 return;
2402         }
2403
2404         if (!am_sender)
2405                 args[ac++] = "--sender";
2406
2407         x = 1;
2408         argstr[0] = '-';
2409
2410         if (protect_args)
2411                 argstr[x++] = 's';
2412
2413         for (i = 0; i < verbose; i++)
2414                 argstr[x++] = 'v';
2415
2416         /* the -q option is intentionally left out */
2417         if (make_backups)
2418                 argstr[x++] = 'b';
2419         if (update_only)
2420                 argstr[x++] = 'u';
2421         if (!do_xfers) /* Note: NOT "dry_run"! */
2422                 argstr[x++] = 'n';
2423         if (preserve_links)
2424                 argstr[x++] = 'l';
2425         if ((xfer_dirs >= 2 && xfer_dirs < 4)
2426          || (xfer_dirs && !recurse && (list_only || (delete_mode && am_sender))))
2427                 argstr[x++] = 'd';
2428         if (am_sender) {
2429                 if (keep_dirlinks)
2430                         argstr[x++] = 'K';
2431                 if (prune_empty_dirs)
2432                         argstr[x++] = 'm';
2433                 if (omit_dir_times)
2434                         argstr[x++] = 'O';
2435                 if (omit_link_times)
2436                         argstr[x++] = 'J';
2437                 if (fuzzy_basis) {
2438                         argstr[x++] = 'y';
2439                         if (fuzzy_basis > 1)
2440                                 argstr[x++] = 'y';
2441                 }
2442         } else {
2443                 if (copy_links)
2444                         argstr[x++] = 'L';
2445                 if (copy_dirlinks)
2446                         argstr[x++] = 'k';
2447         }
2448
2449         if (whole_file > 0)
2450                 argstr[x++] = 'W';
2451         /* We don't need to send --no-whole-file, because it's the
2452          * default for remote transfers, and in any case old versions
2453          * of rsync will not understand it. */
2454
2455         if (preserve_hard_links) {
2456                 argstr[x++] = 'H';
2457                 if (preserve_hard_links > 1)
2458                         argstr[x++] = 'H';
2459         }
2460         if (preserve_uid)
2461                 argstr[x++] = 'o';
2462         if (preserve_gid)
2463                 argstr[x++] = 'g';
2464         if (preserve_devices) /* ignore preserve_specials here */
2465                 argstr[x++] = 'D';
2466         if (preserve_times)
2467                 argstr[x++] = 't';
2468         if (preserve_perms)
2469                 argstr[x++] = 'p';
2470         else if (preserve_executability && am_sender)
2471                 argstr[x++] = 'E';
2472 #ifdef SUPPORT_ACLS
2473         if (preserve_acls)
2474                 argstr[x++] = 'A';
2475 #endif
2476 #ifdef SUPPORT_XATTRS
2477         if (preserve_xattrs) {
2478                 argstr[x++] = 'X';
2479                 if (preserve_xattrs > 1)
2480                         argstr[x++] = 'X';
2481         }
2482 #endif
2483         if (recurse)
2484                 argstr[x++] = 'r';
2485         if (always_checksum)
2486                 argstr[x++] = 'c';
2487         if (cvs_exclude)
2488                 argstr[x++] = 'C';
2489         if (ignore_times)
2490                 argstr[x++] = 'I';
2491         if (relative_paths)
2492                 argstr[x++] = 'R';
2493         if (one_file_system) {
2494                 argstr[x++] = 'x';
2495                 if (one_file_system > 1)
2496                         argstr[x++] = 'x';
2497         }
2498         if (sparse_files)
2499                 argstr[x++] = 'S';
2500         if (do_compression == 1)
2501                 argstr[x++] = 'z';
2502
2503         set_allow_inc_recurse();
2504
2505         /* We don't really know the actual protocol_version at this point,
2506          * but checking the pre-negotiated value allows the user to use a
2507          * --protocol=29 override to avoid the use of this -eFLAGS opt. */
2508         if (protocol_version >= 30) {
2509                 /* Use "eFlags" alias so that cull_options doesn't think that these are no-arg option letters. */
2510 #define eFlags argstr
2511                 /* We make use of the -e option to let the server know about
2512                  * any pre-release protocol version && some behavior flags. */
2513                 eFlags[x++] = 'e';
2514 #if SUBPROTOCOL_VERSION != 0
2515                 if (protocol_version == PROTOCOL_VERSION) {
2516                         x += snprintf(argstr+x, sizeof argstr - x,
2517                                       "%d.%d",
2518                                       PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
2519                 } else
2520 #endif
2521                         eFlags[x++] = '.';
2522                 if (allow_inc_recurse)
2523                         eFlags[x++] = 'i';
2524 #ifdef CAN_SET_SYMLINK_TIMES
2525                 eFlags[x++] = 'L'; /* symlink time-setting support */
2526 #endif
2527 #ifdef ICONV_OPTION
2528                 eFlags[x++] = 's'; /* symlink iconv translation support */
2529 #endif
2530                 eFlags[x++] = 'f'; /* flist I/O-error safety support */
2531                 eFlags[x++] = 'x'; /* xattr hardlink optimization not desired */
2532                 eFlags[x++] = 'C'; /* support checksum seed order fix */
2533 #undef eFlags
2534         }
2535
2536         if (x >= (int)sizeof argstr) { /* Not possible... */
2537                 rprintf(FERROR, "argstr overflow in server_options().\n");
2538                 exit_cleanup(RERR_MALLOC);
2539         }
2540
2541         argstr[x] = '\0';
2542
2543         if (x > 1)
2544                 args[ac++] = argstr;
2545
2546 #ifdef ICONV_OPTION
2547         if (iconv_opt) {
2548                 char *set = strchr(iconv_opt, ',');
2549                 if (set)
2550                         set++;
2551                 else
2552                         set = iconv_opt;
2553                 if (asprintf(&arg, "--iconv=%s", set) < 0)
2554                         goto oom;
2555                 args[ac++] = arg;
2556         }
2557 #endif
2558
2559         if (protect_args && !local_server) /* unprotected args stop here */
2560                 args[ac++] = NULL;
2561
2562         if (list_only > 1)
2563                 args[ac++] = "--list-only";
2564
2565         /* This makes sure that the remote rsync can handle deleting with -d
2566          * sans -r because the --no-r option was added at the same time. */
2567         if (xfer_dirs && !recurse && delete_mode && am_sender)
2568                 args[ac++] = "--no-r";
2569
2570         if (do_compression && def_compress_level != Z_DEFAULT_COMPRESSION) {
2571                 if (asprintf(&arg, "--compress-level=%d", def_compress_level) < 0)
2572                         goto oom;
2573                 args[ac++] = arg;
2574         }
2575
2576         if (preserve_devices) {
2577                 /* Note: sending "--devices" would not be backward-compatible. */
2578                 if (!preserve_specials)
2579                         args[ac++] = "--no-specials"; /* -D is already set. */
2580         } else if (preserve_specials)
2581                 args[ac++] = "--specials";
2582
2583         /* The server side doesn't use our log-format, but in certain
2584          * circumstances they need to know a little about the option. */
2585         if (stdout_format && am_sender) {
2586                 /* Use --log-format, not --out-format, for compatibility. */
2587                 if (stdout_format_has_i > 1)
2588                         args[ac++] = "--log-format=%i%I";
2589                 else if (stdout_format_has_i)
2590                         args[ac++] = "--log-format=%i";
2591                 else if (stdout_format_has_o_or_i)
2592                         args[ac++] = "--log-format=%o";
2593                 else if (!verbose)
2594                         args[ac++] = "--log-format=X";
2595         }
2596
2597         if (block_size) {
2598                 if (asprintf(&arg, "-B%lu", block_size) < 0)
2599                         goto oom;
2600                 args[ac++] = arg;
2601         }
2602
2603         if (io_timeout) {
2604                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
2605                         goto oom;
2606                 args[ac++] = arg;
2607         }
2608
2609         if (bwlimit) {
2610                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
2611                         goto oom;
2612                 args[ac++] = arg;
2613         }
2614
2615         if (backup_dir) {
2616                 args[ac++] = "--backup-dir";
2617                 args[ac++] = backup_dir;
2618         }
2619
2620         /* Only send --suffix if it specifies a non-default value. */
2621         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
2622                 /* We use the following syntax to avoid weirdness with '~'. */
2623                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
2624                         goto oom;
2625                 args[ac++] = arg;
2626         }
2627
2628         if (checksum_choice) {
2629                 if (asprintf(&arg, "--checksum-choice=%s", checksum_choice) < 0)
2630                         goto oom;
2631                 args[ac++] = arg;
2632         }
2633
2634         if (am_sender) {
2635                 if (max_delete > 0) {
2636                         if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
2637                                 goto oom;
2638                         args[ac++] = arg;
2639                 } else if (max_delete == 0)
2640                         args[ac++] = "--max-delete=-1";
2641                 if (min_size >= 0) {
2642                         args[ac++] = "--min-size";
2643                         args[ac++] = min_size_arg;
2644                 }
2645                 if (max_size >= 0) {
2646                         args[ac++] = "--max-size";
2647                         args[ac++] = max_size_arg;
2648                 }
2649                 if (delete_before)
2650                         args[ac++] = "--delete-before";
2651                 else if (delete_during == 2)
2652                         args[ac++] = "--delete-delay";
2653                 else if (delete_during)
2654                         args[ac++] = "--delete-during";
2655                 else if (delete_after)
2656                         args[ac++] = "--delete-after";
2657                 else if (delete_mode && !delete_excluded)
2658                         args[ac++] = "--delete";
2659                 if (delete_excluded)
2660                         args[ac++] = "--delete-excluded";
2661                 if (force_delete)
2662                         args[ac++] = "--force";
2663                 if (write_batch < 0)
2664                         args[ac++] = "--only-write-batch=X";
2665                 if (am_root > 1)
2666                         args[ac++] = "--super";
2667                 if (size_only)
2668                         args[ac++] = "--size-only";
2669                 if (do_stats)
2670                         args[ac++] = "--stats";
2671         } else {
2672                 if (skip_compress) {
2673                         if (asprintf(&arg, "--skip-compress=%s", skip_compress) < 0)
2674                                 goto oom;
2675                         args[ac++] = arg;
2676                 }
2677         }
2678
2679         /* --delete-missing-args needs the cooperation of both sides, but
2680          * the sender can handle --ignore-missing-args by itself. */
2681         if (missing_args == 2)
2682                 args[ac++] = "--delete-missing-args";
2683         else if (missing_args == 1 && !am_sender)
2684                 args[ac++] = "--ignore-missing-args";
2685
2686         if (modify_window_set && am_sender) {
2687                 char *fmt = modify_window < 0 ? "-@%d" : "--modify-window=%d";
2688                 if (asprintf(&arg, fmt, modify_window) < 0)
2689                         goto oom;
2690                 args[ac++] = arg;
2691         }
2692
2693         if (checksum_seed) {
2694                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
2695                         goto oom;
2696                 args[ac++] = arg;
2697         }
2698
2699         if (partial_dir && am_sender) {
2700                 if (partial_dir != tmp_partialdir) {
2701                         args[ac++] = "--partial-dir";
2702                         args[ac++] = partial_dir;
2703                 }
2704                 if (delay_updates)
2705                         args[ac++] = "--delay-updates";
2706         } else if (keep_partial && am_sender)
2707                 args[ac++] = "--partial";
2708
2709         if (ignore_errors)
2710                 args[ac++] = "--ignore-errors";
2711
2712         if (copy_unsafe_links)
2713                 args[ac++] = "--copy-unsafe-links";
2714
2715         if (safe_symlinks)
2716                 args[ac++] = "--safe-links";
2717
2718         if (numeric_ids)
2719                 args[ac++] = "--numeric-ids";
2720
2721         if (use_qsort)
2722                 args[ac++] = "--use-qsort";
2723
2724         if (am_sender) {
2725                 if (usermap) {
2726                         if (asprintf(&arg, "--usermap=%s", usermap) < 0)
2727                                 goto oom;
2728                         args[ac++] = arg;
2729                 }
2730
2731                 if (groupmap) {
2732                         if (asprintf(&arg, "--groupmap=%s", groupmap) < 0)
2733                                 goto oom;
2734                         args[ac++] = arg;
2735                 }
2736
2737                 if (ignore_existing)
2738                         args[ac++] = "--ignore-existing";
2739
2740                 /* Backward compatibility: send --existing, not --ignore-non-existing. */
2741                 if (ignore_non_existing)
2742                         args[ac++] = "--existing";
2743
2744                 if (tmpdir) {
2745                         args[ac++] = "--temp-dir";
2746                         args[ac++] = tmpdir;
2747                 }
2748
2749                 if (basis_dir[0]) {
2750                         /* the server only needs this option if it is not the sender,
2751                          *   and it may be an older version that doesn't know this
2752                          *   option, so don't send it if client is the sender.
2753                          */
2754                         for (i = 0; i < basis_dir_cnt; i++) {
2755                                 args[ac++] = dest_option;
2756                                 args[ac++] = basis_dir[i];
2757                         }
2758                 }
2759         }
2760
2761         /* What flags do we need to send to the other side? */
2762         where = (am_server ? W_CLI : W_SRV) | (am_sender ? W_REC : W_SND);
2763         arg = make_output_option(info_words, info_levels, where);
2764         if (arg)
2765                 args[ac++] = arg;
2766
2767         arg = make_output_option(debug_words, debug_levels, where);
2768         if (arg)
2769                 args[ac++] = arg;
2770
2771         if (append_mode) {
2772                 if (append_mode > 1)
2773                         args[ac++] = "--append";
2774                 args[ac++] = "--append";
2775         } else if (inplace)
2776                 args[ac++] = "--inplace";
2777
2778         if (files_from && (!am_sender || filesfrom_host)) {
2779                 if (filesfrom_host) {
2780                         args[ac++] = "--files-from";
2781                         args[ac++] = files_from;
2782                         if (eol_nulls)
2783                                 args[ac++] = "--from0";
2784                 } else {
2785                         args[ac++] = "--files-from=-";
2786                         args[ac++] = "--from0";
2787                 }
2788                 if (!relative_paths)
2789                         args[ac++] = "--no-relative";
2790         }
2791         /* It's OK that this checks the upper-bound of the protocol_version. */
2792         if (relative_paths && !implied_dirs && (!am_sender || protocol_version >= 30))
2793                 args[ac++] = "--no-implied-dirs";
2794
2795         if (remove_source_files == 1)
2796                 args[ac++] = "--remove-source-files";
2797         else if (remove_source_files)
2798                 args[ac++] = "--remove-sent-files";
2799
2800         if (preallocate_files && am_sender)
2801                 args[ac++] = "--preallocate";
2802
2803         if (ac > MAX_SERVER_ARGS) { /* Not possible... */
2804                 rprintf(FERROR, "argc overflow in server_options().\n");
2805                 exit_cleanup(RERR_MALLOC);
2806         }
2807
2808         if (do_compression > 1)
2809                 args[ac++] = "--new-compress";
2810
2811         if (remote_option_cnt) {
2812                 int j;
2813                 if (ac + remote_option_cnt > MAX_SERVER_ARGS) {
2814                         rprintf(FERROR, "too many remote options specified.\n");
2815                         exit_cleanup(RERR_SYNTAX);
2816                 }
2817                 for (j = 1; j <= remote_option_cnt; j++)
2818                         args[ac++] = (char*)remote_options[j];
2819         }
2820
2821         *argc_p = ac;
2822         return;
2823
2824     oom:
2825         out_of_memory("server_options");
2826 }
2827
2828 /* If str points to a valid hostspec, return allocated memory containing the
2829  * [USER@]HOST part of the string, and set the path_start_ptr to the part of
2830  * the string after the host part.  Otherwise, return NULL.  If port_ptr is
2831  * non-NULL, we must be parsing an rsync:// URL hostname, and we will set
2832  * *port_ptr if a port number is found.  Note that IPv6 IPs will have their
2833  * (required for parsing) [ and ] chars elided from the returned string. */
2834 static char *parse_hostspec(char *str, char **path_start_ptr, int *port_ptr)
2835 {
2836         char *s, *host_start = str;
2837         int hostlen = 0, userlen = 0;
2838         char *ret;
2839
2840         for (s = str; ; s++) {
2841                 if (!*s) {
2842                         /* It is only OK if we run out of string with rsync:// */
2843                         if (!port_ptr)
2844                                 return NULL;
2845                         if (!hostlen)
2846                                 hostlen = s - host_start;
2847                         break;
2848                 }
2849                 if (*s == ':' || *s == '/') {
2850                         if (!hostlen)
2851                                 hostlen = s - host_start;
2852                         if (*s++ == '/') {
2853                                 if (!port_ptr)
2854                                         return NULL;
2855                         } else if (port_ptr) {
2856                                 *port_ptr = atoi(s);
2857                                 while (isDigit(s)) s++;
2858                                 if (*s && *s++ != '/')
2859                                         return NULL;
2860                         }
2861                         break;
2862                 }
2863                 if (*s == '@') {
2864                         userlen = s - str + 1;
2865                         host_start = s + 1;
2866                 } else if (*s == '[') {
2867                         if (s != host_start++)
2868                                 return NULL;
2869                         while (*s && *s != ']' && *s != '/') s++; /*SHARED ITERATOR*/
2870                         hostlen = s - host_start;
2871                         if (*s != ']' || (s[1] && s[1] != '/' && s[1] != ':') || !hostlen)
2872                                 return NULL;
2873                 }
2874         }
2875
2876         *path_start_ptr = s;
2877         ret = new_array(char, userlen + hostlen + 1);
2878         if (userlen)
2879                 strlcpy(ret, str, userlen + 1);
2880         strlcpy(ret + userlen, host_start, hostlen + 1);
2881         return ret;
2882 }
2883
2884 /* Look for a HOST specfication of the form "HOST:PATH", "HOST::PATH", or
2885  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
2886  * memory with the HOST.  If a daemon-accessing spec was specified, the value
2887  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
2888  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
2889  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
2890  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
2891 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
2892 {
2893         char *path;
2894
2895         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
2896                 *host_ptr = parse_hostspec(s + strlen(URL_PREFIX), &path, port_ptr);
2897                 if (*host_ptr) {
2898                         if (!*port_ptr)
2899                                 *port_ptr = RSYNC_PORT;
2900                         return path;
2901                 }
2902         }
2903
2904         *host_ptr = parse_hostspec(s, &path, NULL);
2905         if (!*host_ptr)
2906                 return NULL;
2907
2908         if (*path == ':') {
2909                 if (port_ptr && !*port_ptr)
2910                         *port_ptr = RSYNC_PORT;
2911                 return path + 1;
2912         }
2913         if (port_ptr)
2914                 *port_ptr = 0;
2915
2916         return path;
2917 }