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) 2002-2019 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 write_devices = 0;
  54 int preserve_links = 0;
  55 int preserve_hard_links = 0;
  56 int preserve_acls = 0;
  57 int preserve_xattrs = 0;
  58 int preserve_perms = 0;
  59 int preserve_executability = 0;
  60 int preserve_devices = 0;
  61 int preserve_specials = 0;
  62 int preserve_uid = 0;
  63 int preserve_gid = 0;
  64 int preserve_times = 0;
  65 int update_only = 0;
  66 int cvs_exclude = 0;
  67 int dry_run = 0;
  68 int do_xfers = 1;
  69 int ignore_times = 0;
  70 int delete_mode = 0;
  71 int delete_during = 0;
  72 int delete_before = 0;
  73 int delete_after = 0;
  74 int delete_excluded = 0;
  75 int remove_source_files = 0;
  76 int one_file_system = 0;
  77 int protocol_version = PROTOCOL_VERSION;
  78 int sparse_files = 0;
  79 int preallocate_files = 0;
  80 int do_compression = 0;
  81 int def_compress_level = NOT_SPECIFIED;
  82 int am_root = 0; /* 0 = normal, 1 = root, 2 = --super, -1 = --fake-super */
  83 int am_server = 0;
  84 int am_sender = 0;
  85 int am_starting_up = 1;
  86 int relative_paths = -1;
  87 int implied_dirs = 1;
  88 int missing_args = 0; /* 0 = FERROR_XFER, 1 = ignore, 2 = delete */
  89 int numeric_ids = 0;
  90 int msgs2stderr = 0;
  91 int allow_8bit_chars = 0;
  92 int force_delete = 0;
  93 int io_timeout = 0;
  94 int prune_empty_dirs = 0;
  95 int use_qsort = 0;
  96 char *files_from = NULL;
  97 int filesfrom_fd = -1;
  98 char *filesfrom_host = NULL;
  99 int eol_nulls = 0;
 100 int protect_args = -1;
 101 int human_readable = 1;
 102 int recurse = 0;
 103 int allow_inc_recurse = 1;
 104 int xfer_dirs = -1;
 105 int am_daemon = 0;
 106 int connect_timeout = 0;
 107 int keep_partial = 0;
 108 int safe_symlinks = 0;
 109 int copy_unsafe_links = 0;
 110 int munge_symlinks = 0;
 111 int size_only = 0;
 112 int daemon_bwlimit = 0;
 113 int bwlimit = 0;
 114 int fuzzy_basis = 0;
 115 size_t bwlimit_writemax = 0;
 116 int ignore_existing = 0;
 117 int ignore_non_existing = 0;
 118 int need_messages_from_generator = 0;
 119 int max_delete = INT_MIN;
 120 OFF_T max_size = -1;
 121 OFF_T min_size = -1;
 122 int ignore_errors = 0;
 123 int modify_window = 0;
 124 int blocking_io = -1;
 125 int checksum_seed = 0;
 126 int inplace = 0;
 127 int delay_updates = 0;
 128 long block_size = 0; /* "long" because popt can't set an int32. */
 129 char *skip_compress = NULL;
 130 char *copy_as = NULL;
 131 item_list dparam_list = EMPTY_ITEM_LIST;
 132
 133 /** Network address family. **/
 134 int default_af_hint
 135 #ifdef INET6
 136         = 0;            /* Any protocol */
 137 #else
 138         = AF_INET;      /* Must use IPv4 */
 139 # ifdef AF_INET6
 140 #  undef AF_INET6
 141 # endif
 142 # define AF_INET6 AF_INET /* make -6 option a no-op */
 143 #endif
 144
 145 /** Do not go into the background when run as --daemon.  Good
 146  * for debugging and required for running as a service on W32,
 147  * or under Unix process-monitors. **/
 148 int no_detach
 149 #if defined _WIN32 || defined __WIN32__
 150         = 1;
 151 #else
 152         = 0;
 153 #endif
 154
 155 int write_batch = 0;
 156 int read_batch = 0;
 157 int backup_dir_len = 0;
 158 int backup_suffix_len;
 159 unsigned int backup_dir_remainder;
 160
 161 char *backup_suffix = NULL;
 162 char *tmpdir = NULL;
 163 char *partial_dir = NULL;
 164 char *basis_dir[MAX_BASIS_DIRS+1];
 165 char *config_file = NULL;
 166 char *shell_cmd = NULL;
 167 char *logfile_name = NULL;
 168 char *logfile_format = NULL;
 169 char *stdout_format = NULL;
 170 char *password_file = NULL;
 171 char *rsync_path = RSYNC_PATH;
 172 char *backup_dir = NULL;
 173 char backup_dir_buf[MAXPATHLEN];
 174 char *sockopts = NULL;
 175 char *usermap = NULL;
 176 char *groupmap = NULL;
 177 int rsync_port = 0;
 178 int compare_dest = 0;
 179 int copy_dest = 0;
 180 int link_dest = 0;
 181 int basis_dir_cnt = 0;
 182 char *dest_option = NULL;
 183
 184 static int remote_option_alloc = 0;
 185 int remote_option_cnt = 0;
 186 const char **remote_options = NULL;
 187 const char *checksum_choice = NULL;
 188
 189 int quiet = 0;
 190 int output_motd = 1;
 191 int log_before_transfer = 0;
 192 int stdout_format_has_i = 0;
 193 int stdout_format_has_o_or_i = 0;
 194 int logfile_format_has_i = 0;
 195 int logfile_format_has_o_or_i = 0;
 196 int always_checksum = 0;
 197 int list_only = 0;
 198
 199 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
 200 char *batch_name = NULL;
 201
 202 int need_unsorted_flist = 0;
 203 #ifdef ICONV_OPTION
 204 char *iconv_opt = ICONV_OPTION;
 205 #endif
 206
 207 struct chmod_mode_struct *chmod_modes = NULL;
 208
 209 static const char *debug_verbosity[] = {
 210         /*0*/ NULL,
 211         /*1*/ NULL,
 212         /*2*/ "BIND,CMD,CONNECT,DEL,DELTASUM,DUP,FILTER,FLIST,ICONV",
 213         /*3*/ "ACL,BACKUP,CONNECT2,DELTASUM2,DEL2,EXIT,FILTER2,FLIST2,FUZZY,GENR,OWN,RECV,SEND,TIME",
 214         /*4*/ "CMD2,DELTASUM3,DEL3,EXIT2,FLIST3,ICONV2,OWN2,PROTO,TIME2",
 215         /*5*/ "CHDIR,DELTASUM4,FLIST4,FUZZY2,HASH,HLINK",
 216 };
 217
 218 #define MAX_VERBOSITY ((int)(sizeof debug_verbosity / sizeof debug_verbosity[0]) - 1)
 219
 220 static const char *info_verbosity[1+MAX_VERBOSITY] = {
 221         /*0*/ NULL,
 222         /*1*/ "COPY,DEL,FLIST,MISC,NAME,STATS,SYMSAFE",
 223         /*2*/ "BACKUP,MISC2,MOUNT,NAME2,REMOVE,SKIP",
 224 };
 225
 226 #define MAX_OUT_LEVEL 4 /* The largest N allowed for any flagN word. */
 227
 228 short info_levels[COUNT_INFO], debug_levels[COUNT_DEBUG];
 229
 230 #define DEFAULT_PRIORITY 0      /* Default/implied/--verbose set values. */
 231 #define HELP_PRIORITY 1         /* The help output uses this level. */
 232 #define USER_PRIORITY 2         /* User-specified via --info or --debug */
 233 #define LIMIT_PRIORITY 3        /* Overriding priority when limiting values. */
 234
 235 #define W_CLI (1<<0)    /* client side */
 236 #define W_SRV (1<<1)    /* server side */
 237 #define W_SND (1<<2)    /* sending side */
 238 #define W_REC (1<<3)    /* receiving side */
 239
 240 struct output_struct {
 241         char *name;     /* The name of the info/debug flag. */
 242         char *help;     /* The description of the info/debug flag. */
 243         uchar namelen;  /* The length of the name string. */
 244         uchar flag;     /* The flag's value, for consistency check. */
 245         uchar where;    /* Bits indicating where the flag is used. */
 246         uchar priority; /* See *_PRIORITY defines. */
 247 };
 248
 249 #define INFO_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, INFO_##flag, where, 0 }
 250
 251 static struct output_struct info_words[COUNT_INFO+1] = {
 252         INFO_WORD(BACKUP, W_REC, "Mention files backed up"),
 253         INFO_WORD(COPY, W_REC, "Mention files copied locally on the receiving side"),
 254         INFO_WORD(DEL, W_REC, "Mention deletions on the receiving side"),
 255         INFO_WORD(FLIST, W_CLI, "Mention file-list receiving/sending (levels 1-2)"),
 256         INFO_WORD(MISC, W_SND|W_REC, "Mention miscellaneous information (levels 1-2)"),
 257         INFO_WORD(MOUNT, W_SND|W_REC, "Mention mounts that were found or skipped"),
 258         INFO_WORD(NAME, W_SND|W_REC, "Mention 1) updated file/dir names, 2) unchanged names"),
 259         INFO_WORD(PROGRESS, W_CLI, "Mention 1) per-file progress or 2) total transfer progress"),
 260         INFO_WORD(REMOVE, W_SND, "Mention files removed on the sending side"),
 261         INFO_WORD(SKIP, W_REC, "Mention files that are skipped due to options used"),
 262         INFO_WORD(STATS, W_CLI|W_SRV, "Mention statistics at end of run (levels 1-3)"),
 263         INFO_WORD(SYMSAFE, W_SND|W_REC, "Mention symlinks that are unsafe"),
 264         { NULL, "--info", 0, 0, 0, 0 }
 265 };
 266
 267 #define DEBUG_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, DEBUG_##flag, where, 0 }
 268
 269 static struct output_struct debug_words[COUNT_DEBUG+1] = {
 270         DEBUG_WORD(ACL, W_SND|W_REC, "Debug extra ACL info"),
 271         DEBUG_WORD(BACKUP, W_REC, "Debug backup actions (levels 1-2)"),
 272         DEBUG_WORD(BIND, W_CLI, "Debug socket bind actions"),
 273         DEBUG_WORD(CHDIR, W_CLI|W_SRV, "Debug when the current directory changes"),
 274         DEBUG_WORD(CONNECT, W_CLI, "Debug connection events (levels 1-2)"),
 275         DEBUG_WORD(CMD, W_CLI, "Debug commands+options that are issued (levels 1-2)"),
 276         DEBUG_WORD(DEL, W_REC, "Debug delete actions (levels 1-3)"),
 277         DEBUG_WORD(DELTASUM, W_SND|W_REC, "Debug delta-transfer checksumming (levels 1-4)"),
 278         DEBUG_WORD(DUP, W_REC, "Debug weeding of duplicate names"),
 279         DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-3)"),
 280         DEBUG_WORD(FILTER, W_SND|W_REC, "Debug filter actions (levels 1-2)"),
 281         DEBUG_WORD(FLIST, W_SND|W_REC, "Debug file-list operations (levels 1-4)"),
 282         DEBUG_WORD(FUZZY, W_REC, "Debug fuzzy scoring (levels 1-2)"),
 283         DEBUG_WORD(GENR, W_REC, "Debug generator functions"),
 284         DEBUG_WORD(HASH, W_SND|W_REC, "Debug hashtable code"),
 285         DEBUG_WORD(HLINK, W_SND|W_REC, "Debug hard-link actions (levels 1-3)"),
 286         DEBUG_WORD(ICONV, W_CLI|W_SRV, "Debug iconv character conversions (levels 1-2)"),
 287         DEBUG_WORD(IO, W_CLI|W_SRV, "Debug I/O routines (levels 1-4)"),
 288         DEBUG_WORD(OWN, W_REC, "Debug ownership changes in users & groups (levels 1-2)"),
 289         DEBUG_WORD(PROTO, W_CLI|W_SRV, "Debug protocol information"),
 290         DEBUG_WORD(RECV, W_REC, "Debug receiver functions"),
 291         DEBUG_WORD(SEND, W_SND, "Debug sender functions"),
 292         DEBUG_WORD(TIME, W_REC, "Debug setting of modified times (levels 1-2)"),
 293         { NULL, "--debug", 0, 0, 0, 0 }
 294 };
 295
 296 static int verbose = 0;
 297 static int do_stats = 0;
 298 static int do_progress = 0;
 299 static int daemon_opt;   /* sets am_daemon after option error-reporting */
 300 static int omit_dir_times = 0;
 301 static int omit_link_times = 0;
 302 static int F_option_cnt = 0;
 303 static int modify_window_set;
 304 static int itemize_changes = 0;
 305 static int refused_delete, refused_archive_part, refused_compress;
 306 static int refused_partial, refused_progress, refused_delete_before;
 307 static int refused_delete_during;
 308 static int refused_inplace, refused_no_iconv;
 309 static BOOL usermap_via_chown, groupmap_via_chown;
 310 #ifdef HAVE_SETVBUF
 311 static char *outbuf_mode;
 312 #endif
 313 static char *bwlimit_arg, *max_size_arg, *min_size_arg;
 314 static char tmp_partialdir[] = ".~tmp~";
 315
 316 /** Local address to bind.  As a character string because it's
 317  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
 318  * address, or a hostname. **/
 319 char *bind_address;
 320
 321 static void output_item_help(struct output_struct *words);
 322
 323 /* This constructs a string that represents all the options set for either
 324  * the --info or --debug setting, skipping any implied options (by -v, etc.).
 325  * This is used both when conveying the user's options to the server, and
 326  * when the help output wants to tell the user what options are implied. */
 327 static char *make_output_option(struct output_struct *words, short *levels, uchar where)
 328 {
 329         char *str = words == info_words ? "--info=" : "--debug=";
 330         int j, counts[MAX_OUT_LEVEL+1], pos, skipped = 0, len = 0, max = 0, lev = 0;
 331         int word_count = words == info_words ? COUNT_INFO : COUNT_DEBUG;
 332         char *buf;
 333
 334         memset(counts, 0, sizeof counts);
 335
 336         for (j = 0; words[j].name; j++) {
 337                 if (words[j].flag != j) {
 338                         rprintf(FERROR, "rsync: internal error on %s%s: %d != %d\n",
 339                                 words == info_words ? "INFO_" : "DEBUG_",
 340                                 words[j].name, words[j].flag, j);
 341                         exit_cleanup(RERR_UNSUPPORTED);
 342                 }
 343                 if (!(words[j].where & where))
 344                         continue;
 345                 if (words[j].priority == DEFAULT_PRIORITY) {
 346                         /* Implied items don't need to be mentioned. */
 347                         skipped++;
 348                         continue;
 349                 }
 350                 len += len ? 1 : strlen(str);
 351                 len += strlen(words[j].name);
 352                 len += levels[j] == 1 ? 0 : 1;
 353
 354                 if (words[j].priority == HELP_PRIORITY)
 355                         continue; /* no abbreviating for help */
 356
 357                 assert(levels[j] <= MAX_OUT_LEVEL);
 358                 if (++counts[levels[j]] > max) {
 359                         /* Determine which level has the most items. */
 360                         lev = levels[j];
 361                         max = counts[lev];
 362                 }
 363         }
 364
 365         /* Sanity check the COUNT_* define against the length of the table. */
 366         if (j != word_count) {
 367                 rprintf(FERROR, "rsync: internal error: %s is wrong! (%d != %d)\n",
 368                         words == info_words ? "COUNT_INFO" : "COUNT_DEBUG",
 369                         j, word_count);
 370                 exit_cleanup(RERR_UNSUPPORTED);
 371         }
 372
 373         if (!len)
 374                 return NULL;
 375
 376         len++;
 377         if (!(buf = new_array(char, len)))
 378                 out_of_memory("make_output_option");
 379         pos = 0;
 380
 381         if (skipped || max < 5)
 382                 lev = -1;
 383         else {
 384                 if (lev == 0)
 385                         pos += snprintf(buf, len, "%sNONE", str);
 386                 else if (lev == 1)
 387                         pos += snprintf(buf, len, "%sALL", str);
 388                 else
 389                         pos += snprintf(buf, len, "%sALL%d", str, lev);
 390         }
 391
 392         for (j = 0; words[j].name && pos < len; j++) {
 393                 if (words[j].priority == DEFAULT_PRIORITY || levels[j] == lev || !(words[j].where & where))
 394                         continue;
 395                 if (pos)
 396                         buf[pos++] = ',';
 397                 else
 398                         pos += strlcpy(buf+pos, str, len-pos);
 399                 if (pos < len)
 400                         pos += strlcpy(buf+pos, words[j].name, len-pos);
 401                 /* Level 1 is implied by the name alone. */
 402                 if (levels[j] != 1 && pos < len)
 403                         buf[pos++] = '0' + levels[j];
 404         }
 405
 406         buf[pos] = '\0';
 407
 408         return buf;
 409 }
 410
 411 static void parse_output_words(struct output_struct *words, short *levels,
 412                                const char *str, uchar priority)
 413 {
 414         const char *s;
 415         int j, len, lev;
 416
 417         for ( ; str; str = s) {
 418                 if ((s = strchr(str, ',')) != NULL)
 419                         len = s++ - str;
 420                 else
 421                         len = strlen(str);
 422                 if (!len)
 423                         continue;
 424                 if (!isDigit(str)) {
 425                         while (len && isDigit(str+len-1))
 426                                 len--;
 427                 }
 428                 lev = isDigit(str+len) ? atoi(str+len) : 1;
 429                 if (lev > MAX_OUT_LEVEL)
 430                         lev = MAX_OUT_LEVEL;
 431                 if (len == 4 && strncasecmp(str, "help", 4) == 0) {
 432                         output_item_help(words);
 433                         exit_cleanup(0);
 434                 }
 435                 if (len == 4 && strncasecmp(str, "none", 4) == 0)
 436                         len = lev = 0;
 437                 else if (len == 3 && strncasecmp(str, "all", 3) == 0)
 438                         len = 0;
 439                 for (j = 0; words[j].name; j++) {
 440                         if (!len
 441                          || (len == words[j].namelen && strncasecmp(str, words[j].name, len) == 0)) {
 442                                 if (priority >= words[j].priority) {
 443                                         words[j].priority = priority;
 444                                         levels[j] = lev;
 445                                 }
 446                                 if (len)
 447                                         break;
 448                         }
 449                 }
 450                 if (len && !words[j].name) {
 451                         rprintf(FERROR, "Unknown %s item: \"%.*s\"\n",
 452                                 words[j].help, len, str);
 453                         exit_cleanup(RERR_SYNTAX);
 454                 }
 455         }
 456 }
 457
 458 /* Tell the user what all the info or debug flags mean. */
 459 static void output_item_help(struct output_struct *words)
 460 {
 461         short *levels = words == info_words ? info_levels : debug_levels;
 462         const char **verbosity = words == info_words ? info_verbosity : debug_verbosity;
 463         char buf[128], *opt, *fmt = "%-10s %s\n";
 464         int j;
 465
 466         reset_output_levels();
 467
 468         rprintf(FINFO, "Use OPT or OPT1 for level 1 output, OPT2 for level 2, etc.; OPT0 silences.\n");
 469         rprintf(FINFO, "\n");
 470         for (j = 0; words[j].name; j++)
 471                 rprintf(FINFO, fmt, words[j].name, words[j].help);
 472         rprintf(FINFO, "\n");
 473
 474         snprintf(buf, sizeof buf, "Set all %s options (e.g. all%d)",
 475                  words[j].help, MAX_OUT_LEVEL);
 476         rprintf(FINFO, fmt, "ALL", buf);
 477
 478         snprintf(buf, sizeof buf, "Silence all %s options (same as all0)",
 479                  words[j].help);
 480         rprintf(FINFO, fmt, "NONE", buf);
 481
 482         rprintf(FINFO, fmt, "HELP", "Output this help message");
 483         rprintf(FINFO, "\n");
 484         rprintf(FINFO, "Options added for each increase in verbose level:\n");
 485
 486         for (j = 1; j <= MAX_VERBOSITY; j++) {
 487                 parse_output_words(words, levels, verbosity[j], HELP_PRIORITY);
 488                 opt = make_output_option(words, levels, W_CLI|W_SRV|W_SND|W_REC);
 489                 if (opt) {
 490                         rprintf(FINFO, "%d) %s\n", j, strchr(opt, '=')+1);
 491                         free(opt);
 492                 }
 493                 reset_output_levels();
 494         }
 495 }
 496
 497 /* The --verbose option now sets info+debug flags. */
 498 static void set_output_verbosity(int level, uchar priority)
 499 {
 500         int j;
 501
 502         if (level > MAX_VERBOSITY)
 503                 level = MAX_VERBOSITY;
 504
 505         for (j = 1; j <= level; j++) {
 506                 parse_output_words(info_words, info_levels, info_verbosity[j], priority);
 507                 parse_output_words(debug_words, debug_levels, debug_verbosity[j], priority);
 508         }
 509 }
 510
 511 /* Limit the info+debug flag levels given a verbose-option level limit. */
 512 void limit_output_verbosity(int level)
 513 {
 514         short info_limits[COUNT_INFO], debug_limits[COUNT_DEBUG];
 515         int j;
 516
 517         if (level > MAX_VERBOSITY)
 518                 return;
 519
 520         memset(info_limits, 0, sizeof info_limits);
 521         memset(debug_limits, 0, sizeof debug_limits);
 522
 523         /* Compute the level limits in the above arrays. */
 524         for (j = 1; j <= level; j++) {
 525                 parse_output_words(info_words, info_limits, info_verbosity[j], LIMIT_PRIORITY);
 526                 parse_output_words(debug_words, debug_limits, debug_verbosity[j], LIMIT_PRIORITY);
 527         }
 528
 529         for (j = 0; j < COUNT_INFO; j++) {
 530                 if (info_levels[j] > info_limits[j])
 531                         info_levels[j] = info_limits[j];
 532         }
 533
 534         for (j = 0; j < COUNT_DEBUG; j++) {
 535                 if (debug_levels[j] > debug_limits[j])
 536                         debug_levels[j] = debug_limits[j];
 537         }
 538 }
 539
 540 void reset_output_levels(void)
 541 {
 542         int j;
 543
 544         memset(info_levels, 0, sizeof info_levels);
 545         memset(debug_levels, 0, sizeof debug_levels);
 546
 547         for (j = 0; j < COUNT_INFO; j++)
 548                 info_words[j].priority = DEFAULT_PRIORITY;
 549
 550         for (j = 0; j < COUNT_DEBUG; j++)
 551                 debug_words[j].priority = DEFAULT_PRIORITY;
 552 }
 553
 554 void negate_output_levels(void)
 555 {
 556         int j;
 557
 558         for (j = 0; j < COUNT_INFO; j++)
 559                 info_levels[j] *= -1;
 560
 561         for (j = 0; j < COUNT_DEBUG; j++)
 562                 debug_levels[j] *= -1;
 563 }
 564
 565 static void print_rsync_version(enum logcode f)
 566 {
 567         char *subprotocol = "";
 568         char const *got_socketpair = "no ";
 569         char const *have_inplace = "no ";
 570         char const *hardlinks = "no ";
 571         char const *prealloc = "no ";
 572         char const *symtimes = "no ";
 573         char const *acls = "no ";
 574         char const *xattrs = "no ";
 575         char const *links = "no ";
 576         char const *iconv = "no ";
 577         char const *ipv6 = "no ";
 578         STRUCT_STAT *dumstat;
 579
 580 #if SUBPROTOCOL_VERSION != 0
 581         if (asprintf(&subprotocol, ".PR%d", SUBPROTOCOL_VERSION) < 0)
 582                 out_of_memory("print_rsync_version");
 583 #endif
 584 #ifdef HAVE_SOCKETPAIR
 585         got_socketpair = "";
 586 #endif
 587 #ifdef HAVE_FTRUNCATE
 588         have_inplace = "";
 589 #endif
 590 #ifdef SUPPORT_HARD_LINKS
 591         hardlinks = "";
 592 #endif
 593 #ifdef SUPPORT_PREALLOCATION
 594         prealloc = "";
 595 #endif
 596 #ifdef SUPPORT_ACLS
 597         acls = "";
 598 #endif
 599 #ifdef SUPPORT_XATTRS
 600         xattrs = "";
 601 #endif
 602 #ifdef SUPPORT_LINKS
 603         links = "";
 604 #endif
 605 #ifdef INET6
 606         ipv6 = "";
 607 #endif
 608 #ifdef ICONV_OPTION
 609         iconv = "";
 610 #endif
 611 #ifdef CAN_SET_SYMLINK_TIMES
 612         symtimes = "";
 613 #endif
 614
 615         rprintf(f, "%s  version %s  protocol version %d%s\n",
 616                 RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION, subprotocol);
 617         rprintf(f, "Copyright (C) 1996-2019 by Andrew Tridgell, Wayne Davison, and others.\n");
 618         rprintf(f, "Web site: http://rsync.samba.org/\n");
 619         rprintf(f, "Capabilities:\n");
 620         rprintf(f, "    %d-bit files, %d-bit inums, %d-bit timestamps, %d-bit long ints,\n",
 621                 (int)(sizeof (OFF_T) * 8),
 622                 (int)(sizeof dumstat->st_ino * 8), /* Don't check ino_t! */
 623                 (int)(sizeof (time_t) * 8),
 624                 (int)(sizeof (int64) * 8));
 625         rprintf(f, "    %ssocketpairs, %shardlinks, %ssymlinks, %sIPv6, batchfiles, %sinplace,\n",
 626                 got_socketpair, hardlinks, links, ipv6, have_inplace);
 627         rprintf(f, "    %sappend, %sACLs, %sxattrs, %siconv, %ssymtimes, %sprealloc\n",
 628                 have_inplace, acls, xattrs, iconv, symtimes, prealloc);
 629
 630 #ifdef MAINTAINER_MODE
 631         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
 632 #endif
 633
 634 #if SIZEOF_INT64 < 8
 635         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
 636 #endif
 637         if (sizeof (int64) != SIZEOF_INT64) {
 638                 rprintf(f,
 639                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
 640                         (int) SIZEOF_INT64, (int) sizeof (int64));
 641         }
 642
 643         rprintf(f,"\n");
 644         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
 645         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
 646         rprintf(f,"General Public Licence for details.\n");
 647 }
 648
 649
 650 void usage(enum logcode F)
 651 {
 652   print_rsync_version(F);
 653
 654   rprintf(F,"\n");
 655   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
 656   rprintf(F,"via a fast differencing algorithm.\n");
 657
 658   rprintf(F,"\n");
 659   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
 660   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
 661   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
 662   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
 663   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
 664   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
 665   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
 666   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
 667   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
 668   rprintf(F,"\n");
 669   rprintf(F,"Options\n");
 670   rprintf(F," -v, --verbose               increase verbosity\n");
 671   rprintf(F,"     --info=FLAGS            fine-grained informational verbosity\n");
 672   rprintf(F,"     --debug=FLAGS           fine-grained debug verbosity\n");
 673   rprintf(F,"     --msgs2stderr           special output handling for debugging\n");
 674   rprintf(F," -q, --quiet                 suppress non-error messages\n");
 675   rprintf(F,"     --no-motd               suppress daemon-mode MOTD (see manpage caveat)\n");
 676   rprintf(F," -c, --checksum              skip based on checksum, not mod-time & size\n");
 677   rprintf(F," -a, --archive               archive mode; equals -rlptgoD (no -H,-A,-X)\n");
 678   rprintf(F,"     --no-OPTION             turn off an implied OPTION (e.g. --no-D)\n");
 679   rprintf(F," -r, --recursive             recurse into directories\n");
 680   rprintf(F," -R, --relative              use relative path names\n");
 681   rprintf(F,"     --no-implied-dirs       don't send implied dirs with --relative\n");
 682   rprintf(F," -b, --backup                make backups (see --suffix & --backup-dir)\n");
 683   rprintf(F,"     --backup-dir=DIR        make backups into hierarchy based in DIR\n");
 684   rprintf(F,"     --suffix=SUFFIX         set backup suffix (default %s w/o --backup-dir)\n",BACKUP_SUFFIX);
 685   rprintf(F," -u, --update                skip files that are newer on the receiver\n");
 686   rprintf(F,"     --inplace               update destination files in-place (SEE MAN PAGE)\n");
 687   rprintf(F,"     --append                append data onto shorter files\n");
 688   rprintf(F,"     --append-verify         like --append, but with old data in file checksum\n");
 689   rprintf(F," -d, --dirs                  transfer directories without recursing\n");
 690   rprintf(F," -l, --links                 copy symlinks as symlinks\n");
 691   rprintf(F," -L, --copy-links            transform symlink into referent file/dir\n");
 692   rprintf(F,"     --copy-unsafe-links     only \"unsafe\" symlinks are transformed\n");
 693   rprintf(F,"     --safe-links            ignore symlinks that point outside the source tree\n");
 694   rprintf(F,"     --munge-links           munge symlinks to make them safer (but unusable)\n");
 695   rprintf(F," -k, --copy-dirlinks         transform symlink to a dir into referent dir\n");
 696   rprintf(F," -K, --keep-dirlinks         treat symlinked dir on receiver as dir\n");
 697   rprintf(F," -H, --hard-links            preserve hard links\n");
 698   rprintf(F," -p, --perms                 preserve permissions\n");
 699   rprintf(F," -E, --executability         preserve the file's executability\n");
 700   rprintf(F,"     --chmod=CHMOD           affect file and/or directory permissions\n");
 701 #ifdef SUPPORT_ACLS
 702   rprintf(F," -A, --acls                  preserve ACLs (implies --perms)\n");
 703 #endif
 704 #ifdef SUPPORT_XATTRS
 705   rprintf(F," -X, --xattrs                preserve extended attributes\n");
 706 #endif
 707   rprintf(F," -o, --owner                 preserve owner (super-user only)\n");
 708   rprintf(F," -g, --group                 preserve group\n");
 709   rprintf(F,"     --devices               preserve device files (super-user only)\n");
 710   rprintf(F,"     --specials              preserve special files\n");
 711   rprintf(F," -D                          same as --devices --specials\n");
 712   rprintf(F," -t, --times                 preserve modification times\n");
 713   rprintf(F," -O, --omit-dir-times        omit directories from --times\n");
 714   rprintf(F," -J, --omit-link-times       omit symlinks from --times\n");
 715   rprintf(F,"     --super                 receiver attempts super-user activities\n");
 716 #ifdef SUPPORT_XATTRS
 717   rprintf(F,"     --fake-super            store/recover privileged attrs using xattrs\n");
 718 #endif
 719   rprintf(F," -S, --sparse                turn sequences of nulls into sparse blocks\n");
 720 #ifdef SUPPORT_PREALLOCATION
 721   rprintf(F,"     --preallocate           allocate dest files before writing them\n");
 722 #else
 723   rprintf(F,"     --preallocate           pre-allocate dest files on remote receiver\n");
 724 #endif
 725   rprintf(F,"     --write-devices         write to devices as files (implies --inplace)\n");
 726   rprintf(F," -n, --dry-run               perform a trial run with no changes made\n");
 727   rprintf(F," -W, --whole-file            copy files whole (without delta-xfer algorithm)\n");
 728   rprintf(F,"     --checksum-choice=STR   choose the checksum algorithms\n");
 729   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
 730   rprintf(F," -B, --block-size=SIZE       force a fixed checksum block-size\n");
 731   rprintf(F," -e, --rsh=COMMAND           specify the remote shell to use\n");
 732   rprintf(F,"     --rsync-path=PROGRAM    specify the rsync to run on the remote machine\n");
 733   rprintf(F,"     --existing              skip creating new files on receiver\n");
 734   rprintf(F,"     --ignore-existing       skip updating files that already exist on receiver\n");
 735   rprintf(F,"     --remove-source-files   sender removes synchronized files (non-dirs)\n");
 736   rprintf(F,"     --del                   an alias for --delete-during\n");
 737   rprintf(F,"     --delete                delete extraneous files from destination dirs\n");
 738   rprintf(F,"     --delete-before         receiver deletes before transfer, not during\n");
 739   rprintf(F,"     --delete-during         receiver deletes during the transfer\n");
 740   rprintf(F,"     --delete-delay          find deletions during, delete after\n");
 741   rprintf(F,"     --delete-after          receiver deletes after transfer, not during\n");
 742   rprintf(F,"     --delete-excluded       also delete excluded files from destination dirs\n");
 743   rprintf(F,"     --ignore-missing-args   ignore missing source args without error\n");
 744   rprintf(F,"     --delete-missing-args   delete missing source args from destination\n");
 745   rprintf(F,"     --ignore-errors         delete even if there are I/O errors\n");
 746   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
 747   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
 748   rprintf(F,"     --max-size=SIZE         don't transfer any file larger than SIZE\n");
 749   rprintf(F,"     --min-size=SIZE         don't transfer any file smaller than SIZE\n");
 750   rprintf(F,"     --partial               keep partially transferred files\n");
 751   rprintf(F,"     --partial-dir=DIR       put a partially transferred file into DIR\n");
 752   rprintf(F,"     --delay-updates         put all updated files into place at transfer's end\n");
 753   rprintf(F," -m, --prune-empty-dirs      prune empty directory chains from the file-list\n");
 754   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
 755   rprintf(F,"     --usermap=STRING        custom username mapping\n");
 756   rprintf(F,"     --groupmap=STRING       custom groupname mapping\n");
 757   rprintf(F,"     --chown=USER:GROUP      simple username/groupname mapping\n");
 758   rprintf(F,"     --timeout=SECONDS       set I/O timeout in seconds\n");
 759   rprintf(F,"     --contimeout=SECONDS    set daemon connection timeout in seconds\n");
 760   rprintf(F," -I, --ignore-times          don't skip files that match in size and mod-time\n");
 761   rprintf(F," -M, --remote-option=OPTION  send OPTION to the remote side only\n");
 762   rprintf(F,"     --size-only             skip files that match in size\n");
 763   rprintf(F," -@, --modify-window=NUM     set the accuracy for mod-time comparisons\n");
 764   rprintf(F," -T, --temp-dir=DIR          create temporary files in directory DIR\n");
 765   rprintf(F," -y, --fuzzy                 find similar file for basis if no dest file\n");
 766   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
 767   rprintf(F,"     --copy-dest=DIR         ... and include copies of unchanged files\n");
 768   rprintf(F,"     --link-dest=DIR         hardlink to files in DIR when unchanged\n");
 769   rprintf(F," -z, --compress              compress file data during the transfer\n");
 770   rprintf(F,"     --compress-level=NUM    explicitly set compression level\n");
 771   rprintf(F,"     --skip-compress=LIST    skip compressing files with a suffix in LIST\n");
 772   rprintf(F," -C, --cvs-exclude           auto-ignore files the same way CVS does\n");
 773   rprintf(F," -f, --filter=RULE           add a file-filtering RULE\n");
 774   rprintf(F," -F                          same as --filter='dir-merge /.rsync-filter'\n");
 775   rprintf(F,"                             repeated: --filter='- .rsync-filter'\n");
 776   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
 777   rprintf(F,"     --exclude-from=FILE     read exclude patterns from FILE\n");
 778   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
 779   rprintf(F,"     --include-from=FILE     read include patterns from FILE\n");
 780   rprintf(F,"     --files-from=FILE       read list of source-file names from FILE\n");
 781   rprintf(F," -0, --from0                 all *-from/filter files are delimited by 0s\n");
 782   rprintf(F," -s, --protect-args          no space-splitting; only wildcard special-chars\n");
 783   rprintf(F,"     --copy-as=USER[:GROUP]  specify user & optional group for the copy\n");
 784   rprintf(F,"     --address=ADDRESS       bind address for outgoing socket to daemon\n");
 785   rprintf(F,"     --port=PORT             specify double-colon alternate port number\n");
 786   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
 787   rprintf(F,"     --blocking-io           use blocking I/O for the remote shell\n");
 788   rprintf(F,"     --stats                 give some file-transfer stats\n");
 789   rprintf(F," -8, --8-bit-output          leave high-bit chars unescaped in output\n");
 790   rprintf(F," -h, --human-readable        output numbers in a human-readable format\n");
 791   rprintf(F,"     --progress              show progress during transfer\n");
 792   rprintf(F," -P                          same as --partial --progress\n");
 793   rprintf(F," -i, --itemize-changes       output a change-summary for all updates\n");
 794   rprintf(F,"     --out-format=FORMAT     output updates using the specified FORMAT\n");
 795   rprintf(F,"     --log-file=FILE         log what we're doing to the specified FILE\n");
 796   rprintf(F,"     --log-file-format=FMT   log updates using the specified FMT\n");
 797   rprintf(F,"     --password-file=FILE    read daemon-access password from FILE\n");
 798   rprintf(F,"     --list-only             list the files instead of copying them\n");
 799   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
 800 #ifdef HAVE_SETVBUF
 801   rprintf(F,"     --outbuf=N|L|B          set output buffering to None, Line, or Block\n");
 802 #endif
 803   rprintf(F,"     --write-batch=FILE      write a batched update to FILE\n");
 804   rprintf(F,"     --only-write-batch=FILE like --write-batch but w/o updating destination\n");
 805   rprintf(F,"     --read-batch=FILE       read a batched update from FILE\n");
 806   rprintf(F,"     --protocol=NUM          force an older protocol version to be used\n");
 807 #ifdef ICONV_OPTION
 808   rprintf(F,"     --iconv=CONVERT_SPEC    request charset conversion of filenames\n");
 809 #endif
 810   rprintf(F,"     --checksum-seed=NUM     set block/file checksum seed (advanced)\n");
 811   rprintf(F," -4, --ipv4                  prefer IPv4\n");
 812   rprintf(F," -6, --ipv6                  prefer IPv6\n");
 813   rprintf(F,"     --version               print version number\n");
 814   rprintf(F,"(-h) --help                  show this help (-h is --help only if used alone)\n");
 815
 816   rprintf(F,"\n");
 817   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
 818   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
 819   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
 820 }
 821
 822 enum {OPT_VERSION = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
 823       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
 824       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
 825       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
 826       OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, OPT_INFO, OPT_DEBUG,
 827       OPT_USERMAP, OPT_GROUPMAP, OPT_CHOWN, OPT_BWLIMIT,
 828       OPT_SERVER, OPT_REFUSED_BASE = 9000};
 829
 830 static struct poptOption long_options[] = {
 831   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 832   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
 833   {"version",          0,  POPT_ARG_NONE,   0, OPT_VERSION, 0, 0},
 834   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
 835   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 836   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 837   {"info",             0,  POPT_ARG_STRING, 0, OPT_INFO, 0, 0 },
 838   {"debug",            0,  POPT_ARG_STRING, 0, OPT_DEBUG, 0, 0 },
 839   {"msgs2stderr",      0,  POPT_ARG_NONE,   &msgs2stderr, 0, 0, 0 },
 840   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
 841   {"motd",             0,  POPT_ARG_VAL,    &output_motd, 1, 0, 0 },
 842   {"no-motd",          0,  POPT_ARG_VAL,    &output_motd, 0, 0, 0 },
 843   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
 844   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
 845   {"no-human-readable",0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 846   {"no-h",             0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 847   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
 848   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
 849   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
 850   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 851   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 852   {"inc-recursive",    0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 853   {"no-inc-recursive", 0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 854   {"i-r",              0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 855   {"no-i-r",           0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 856   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
 857   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 858   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 859   {"old-dirs",         0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 860   {"old-d",            0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 861   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
 862   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 863   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 864   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
 865   {"acls",            'A', POPT_ARG_NONE,   0, 'A', 0, 0 },
 866   {"no-acls",          0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 867   {"no-A",             0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 868   {"xattrs",          'X', POPT_ARG_NONE,   0, 'X', 0, 0 },
 869   {"no-xattrs",        0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 870   {"no-X",             0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 871   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
 872   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 873   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 874   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 1, 0, 0 },
 875   {"no-omit-dir-times",0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 876   {"no-O",             0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 877   {"omit-link-times", 'J', POPT_ARG_VAL,    &omit_link_times, 1, 0, 0 },
 878   {"no-omit-link-times",0, POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 879   {"no-J",             0,  POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 880   {"modify-window",   '@', POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
 881   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
 882   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
 883   {"fake-super",       0,  POPT_ARG_VAL,    &am_root, -1, 0, 0 },
 884   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
 885   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 886   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 887   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
 888   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 889   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 890   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
 891   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
 892   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
 893   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
 894   {"write-devices",    0,  POPT_ARG_VAL,    &write_devices, 1, 0, 0 },
 895   {"no-write-devices", 0,  POPT_ARG_VAL,    &write_devices, 0, 0, 0 },
 896   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
 897   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
 898   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
 899   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 900   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 901   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
 902   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
 903   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
 904   {"munge-links",      0,  POPT_ARG_VAL,    &munge_symlinks, 1, 0, 0 },
 905   {"no-munge-links",   0,  POPT_ARG_VAL,    &munge_symlinks, 0, 0, 0 },
 906   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
 907   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
 908   {"hard-links",      'H', POPT_ARG_NONE,   0, 'H', 0, 0 },
 909   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 910   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 911   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
 912   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 913   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 914   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 915   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 916   {"i-d",              0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 917   {"no-i-d",           0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 918   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
 919   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
 920   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
 921   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
 922   {"no-one-file-system",0, POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 923   {"no-x",             0,  POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 924   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
 925   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 926   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 927   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
 928   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
 929   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
 930   {"sparse",          'S', POPT_ARG_VAL,    &sparse_files, 1, 0, 0 },
 931   {"no-sparse",        0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 932   {"no-S",             0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 933   {"preallocate",      0,  POPT_ARG_NONE,   &preallocate_files, 0, 0, 0},
 934   {"inplace",          0,  POPT_ARG_VAL,    &inplace, 1, 0, 0 },
 935   {"no-inplace",       0,  POPT_ARG_VAL,    &inplace, 0, 0, 0 },
 936   {"append",           0,  POPT_ARG_NONE,   0, OPT_APPEND, 0, 0 },
 937   {"append-verify",    0,  POPT_ARG_VAL,    &append_mode, 2, 0, 0 },
 938   {"no-append",        0,  POPT_ARG_VAL,    &append_mode, 0, 0, 0 },
 939   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
 940   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
 941   {"delete-before",    0,  POPT_ARG_NONE,   &delete_before, 0, 0, 0 },
 942   {"delete-during",    0,  POPT_ARG_VAL,    &delete_during, 1, 0, 0 },
 943   {"delete-delay",     0,  POPT_ARG_VAL,    &delete_during, 2, 0, 0 },
 944   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
 945   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
 946   {"delete-missing-args",0,POPT_BIT_SET,    &missing_args, 2, 0, 0 },
 947   {"ignore-missing-args",0,POPT_BIT_SET,    &missing_args, 1, 0, 0 },
 948   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_source_files, 2, 0, 0 }, /* deprecated */
 949   {"remove-source-files",0,POPT_ARG_VAL,    &remove_source_files, 1, 0, 0 },
 950   {"force",            0,  POPT_ARG_VAL,    &force_delete, 1, 0, 0 },
 951   {"no-force",         0,  POPT_ARG_VAL,    &force_delete, 0, 0, 0 },
 952   {"ignore-errors",    0,  POPT_ARG_VAL,    &ignore_errors, 1, 0, 0 },
 953   {"no-ignore-errors", 0,  POPT_ARG_VAL,    &ignore_errors, 0, 0, 0 },
 954   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
 955   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
 956   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
 957   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
 958   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
 959   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
 960   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
 961   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
 962   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
 963   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 964   {"checksum-choice",  0,  POPT_ARG_STRING, &checksum_choice, 0, 0, 0 },
 965   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 966   {"checksum",        'c', POPT_ARG_VAL,    &always_checksum, 1, 0, 0 },
 967   {"no-checksum",      0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 968   {"no-c",             0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 969   {"block-size",      'B', POPT_ARG_LONG,   &block_size, 0, 0, 0 },
 970   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
 971   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
 972   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
 973   {"fuzzy",           'y', POPT_ARG_NONE,   0, 'y', 0, 0 },
 974   {"no-fuzzy",         0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 975   {"no-y",             0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 976   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
 977   {"old-compress",     0,  POPT_ARG_VAL,    &do_compression, 1, 0, 0 },
 978   {"new-compress",     0,  POPT_ARG_VAL,    &do_compression, 2, 0, 0 },
 979   {"no-compress",      0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
 980   {"no-z",             0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
 981   {"skip-compress",    0,  POPT_ARG_STRING, &skip_compress, 0, 0, 0 },
 982   {"compress-level",   0,  POPT_ARG_INT,    &def_compress_level, 0, 0, 0 },
 983   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
 984   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
 985   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
 986   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
 987   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
 988   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
 989   {"delay-updates",    0,  POPT_ARG_VAL,    &delay_updates, 1, 0, 0 },
 990   {"no-delay-updates", 0,  POPT_ARG_VAL,    &delay_updates, 0, 0, 0 },
 991   {"prune-empty-dirs",'m', POPT_ARG_VAL,    &prune_empty_dirs, 1, 0, 0 },
 992   {"no-prune-empty-dirs",0,POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
 993   {"no-m",             0,  POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
 994   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
 995   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
 996   {"out-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 },
 997   {"log-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 }, /* DEPRECATED */
 998   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
 999   {"no-itemize-changes",0, POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
1000   {"no-i",             0,  POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
1001   {"bwlimit",          0,  POPT_ARG_STRING, &bwlimit_arg, OPT_BWLIMIT, 0, 0 },
1002   {"no-bwlimit",       0,  POPT_ARG_VAL,    &bwlimit, 0, 0, 0 },
1003   {"backup",          'b', POPT_ARG_VAL,    &make_backups, 1, 0, 0 },
1004   {"no-backup",        0,  POPT_ARG_VAL,    &make_backups, 0, 0, 0 },
1005   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
1006   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
1007   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
1008   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
1009   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
1010   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
1011   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
1012   {"from0",           '0', POPT_ARG_VAL,    &eol_nulls, 1, 0, 0},
1013   {"no-from0",         0,  POPT_ARG_VAL,    &eol_nulls, 0, 0, 0},
1014   {"protect-args",    's', POPT_ARG_VAL,    &protect_args, 1, 0, 0},
1015   {"no-protect-args",  0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1016   {"no-s",             0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1017   {"numeric-ids",      0,  POPT_ARG_VAL,    &numeric_ids, 1, 0, 0 },
1018   {"no-numeric-ids",   0,  POPT_ARG_VAL,    &numeric_ids, 0, 0, 0 },
1019   {"usermap",          0,  POPT_ARG_STRING, 0, OPT_USERMAP, 0, 0 },
1020   {"groupmap",         0,  POPT_ARG_STRING, 0, OPT_GROUPMAP, 0, 0 },
1021   {"chown",            0,  POPT_ARG_STRING, 0, OPT_CHOWN, 0, 0 },
1022   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
1023   {"no-timeout",       0,  POPT_ARG_VAL,    &io_timeout, 0, 0, 0 },
1024   {"contimeout",       0,  POPT_ARG_INT,    &connect_timeout, 0, 0, 0 },
1025   {"no-contimeout",    0,  POPT_ARG_VAL,    &connect_timeout, 0, 0, 0 },
1026   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
1027   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
1028   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1029 #ifdef ICONV_OPTION
1030   {"iconv",            0,  POPT_ARG_STRING, &iconv_opt, 0, 0, 0 },
1031   {"no-iconv",         0,  POPT_ARG_NONE,   0, OPT_NO_ICONV, 0, 0 },
1032 #endif
1033   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1034   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1035   {"8-bit-output",    '8', POPT_ARG_VAL,    &allow_8bit_chars, 1, 0, 0 },
1036   {"no-8-bit-output",  0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1037   {"no-8",             0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1038   {"qsort",            0,  POPT_ARG_NONE,   &use_qsort, 0, 0, 0 },
1039   {"copy-as",          0,  POPT_ARG_STRING, &copy_as, 0, 0, 0 },
1040   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1041   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1042   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1043   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
1044   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
1045   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
1046 #ifdef HAVE_SETVBUF
1047   {"outbuf",           0,  POPT_ARG_STRING, &outbuf_mode, 0, 0, 0 },
1048 #endif
1049   {"remote-option",   'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1050   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1051   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
1052   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
1053   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
1054   /* All the following options switch us into daemon-mode option-parsing. */
1055   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1056   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1057   {"dparam",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1058   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1059   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1060   {0,0,0,0, 0, 0, 0}
1061 };
1062
1063 static void daemon_usage(enum logcode F)
1064 {
1065   print_rsync_version(F);
1066
1067   rprintf(F,"\n");
1068   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
1069   rprintf(F,"     --address=ADDRESS       bind to the specified address\n");
1070   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
1071   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
1072   rprintf(F," -M, --dparam=OVERRIDE       override global daemon config parameter\n");
1073   rprintf(F,"     --no-detach             do not detach from the parent\n");
1074   rprintf(F,"     --port=PORT             listen on alternate port number\n");
1075   rprintf(F,"     --log-file=FILE         override the \"log file\" setting\n");
1076   rprintf(F,"     --log-file-format=FMT   override the \"log format\" setting\n");
1077   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
1078   rprintf(F," -v, --verbose               increase verbosity\n");
1079   rprintf(F," -4, --ipv4                  prefer IPv4\n");
1080   rprintf(F," -6, --ipv6                  prefer IPv6\n");
1081   rprintf(F,"     --help                  show this help screen\n");
1082
1083   rprintf(F,"\n");
1084   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
1085   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
1086 }
1087
1088 static struct poptOption long_daemon_options[] = {
1089   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
1090   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1091   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
1092   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
1093   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
1094   {"dparam",          'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1095   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1096   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1097   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
1098   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
1099   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
1100   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
1101   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1102   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1103   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1104   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
1105   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1106   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
1107   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1108   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1109   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
1110   {0,0,0,0, 0, 0, 0}
1111 };
1112
1113
1114 static char err_buf[200];
1115
1116
1117 /**
1118  * Store the option error message, if any, so that we can log the
1119  * connection attempt (which requires parsing the options), and then
1120  * show the error later on.
1121  **/
1122 void option_error(void)
1123 {
1124         if (!err_buf[0]) {
1125                 strlcpy(err_buf, "Error parsing options: option may "
1126                         "be supported on client but not on server?\n",
1127                         sizeof err_buf);
1128         }
1129
1130         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
1131         msleep(20);
1132 }
1133
1134
1135 /**
1136  * Tweak the option table to disable all options that the rsyncd.conf
1137  * file has told us to refuse.
1138  **/
1139 static void set_refuse_options(char *bp)
1140 {
1141         struct poptOption *op;
1142         char *cp, shortname[2];
1143         int is_wild, found_match;
1144
1145         shortname[1] = '\0';
1146
1147         while (1) {
1148                 while (*bp == ' ') bp++;
1149                 if (!*bp)
1150                         break;
1151                 if ((cp = strchr(bp, ' ')) != NULL)
1152                         *cp= '\0';
1153                 is_wild = strpbrk(bp, "*?[") != NULL;
1154                 found_match = 0;
1155                 for (op = long_options; ; op++) {
1156                         *shortname = op->shortName;
1157                         if (!op->longName && !*shortname)
1158                                 break;
1159                         if ((op->longName && wildmatch(bp, op->longName))
1160                             || (*shortname && wildmatch(bp, shortname))) {
1161                                 if (op->argInfo == POPT_ARG_VAL)
1162                                         op->argInfo = POPT_ARG_NONE;
1163                                 op->val = (op - long_options) + OPT_REFUSED_BASE;
1164                                 found_match = 1;
1165                                 /* These flags are set to let us easily check
1166                                  * an implied option later in the code. */
1167                                 switch (*shortname) {
1168                                 case 'r': case 'd': case 'l': case 'p':
1169                                 case 't': case 'g': case 'o': case 'D':
1170                                         refused_archive_part = op->val;
1171                                         break;
1172                                 case 'z':
1173                                         refused_compress = op->val;
1174                                         break;
1175                                 case '\0':
1176                                         if (wildmatch("delete", op->longName))
1177                                                 refused_delete = op->val;
1178                                         else if (wildmatch("delete-before", op->longName))
1179                                                 refused_delete_before = op->val;
1180                                         else if (wildmatch("delete-during", op->longName))
1181                                                 refused_delete_during = op->val;
1182                                         else if (wildmatch("partial", op->longName))
1183                                                 refused_partial = op->val;
1184                                         else if (wildmatch("progress", op->longName))
1185                                                 refused_progress = op->val;
1186                                         else if (wildmatch("inplace", op->longName))
1187                                                 refused_inplace = op->val;
1188                                         else if (wildmatch("no-iconv", op->longName))
1189                                                 refused_no_iconv = op->val;
1190                                         break;
1191                                 }
1192                                 if (!is_wild)
1193                                         break;
1194                         }
1195                 }
1196                 if (!found_match) {
1197                         rprintf(FLOG, "No match for refuse-options string \"%s\"\n",
1198                                 bp);
1199                 }
1200                 if (!cp)
1201                         break;
1202                 *cp = ' ';
1203                 bp = cp + 1;
1204         }
1205 }
1206
1207
1208 static int count_args(const char **argv)
1209 {
1210         int i = 0;
1211
1212         if (argv) {
1213                 while (argv[i] != NULL)
1214                         i++;
1215         }
1216
1217         return i;
1218 }
1219
1220
1221 static OFF_T parse_size_arg(char **size_arg, char def_suf)
1222 {
1223         int reps, mult, make_compatible = 0;
1224         const char *arg;
1225         OFF_T size = 1;
1226
1227         for (arg = *size_arg; isDigit(arg); arg++) {}
1228         if (*arg == '.')
1229                 for (arg++; isDigit(arg); arg++) {}
1230         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
1231         case 'b': case 'B':
1232                 reps = 0;
1233                 break;
1234         case 'k': case 'K':
1235                 reps = 1;
1236                 break;
1237         case 'm': case 'M':
1238                 reps = 2;
1239                 break;
1240         case 'g': case 'G':
1241                 reps = 3;
1242                 break;
1243         default:
1244                 return -1;
1245         }
1246         if (*arg == 'b' || *arg == 'B')
1247                 mult = 1000, make_compatible = 1, arg++;
1248         else if (!*arg || *arg == '+' || *arg == '-')
1249                 mult = 1024;
1250         else if (strncasecmp(arg, "ib", 2) == 0)
1251                 mult = 1024, arg += 2;
1252         else
1253                 return -1;
1254         while (reps--)
1255                 size *= mult;
1256         size *= atof(*size_arg);
1257         if ((*arg == '+' || *arg == '-') && arg[1] == '1')
1258                 size += atoi(arg), make_compatible = 1, arg += 2;
1259         if (*arg)
1260                 return -1;
1261         if (size > 0 && make_compatible && def_suf == 'b') {
1262                 /* We convert this manually because we may need %lld precision,
1263                  * and that's not a portable sprintf() escape. */
1264                 char buf[128], *s = buf + sizeof buf - 1;
1265                 OFF_T num = size;
1266                 *s = '\0';
1267                 while (num) {
1268                         *--s = (char)(num % 10) + '0';
1269                         num /= 10;
1270                 }
1271                 if (!(*size_arg = strdup(s)))
1272                         out_of_memory("parse_size_arg");
1273         }
1274         return size;
1275 }
1276
1277
1278 static void create_refuse_error(int which)
1279 {
1280         /* The "which" value is the index + OPT_REFUSED_BASE. */
1281         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
1282         int n = snprintf(err_buf, sizeof err_buf,
1283                          "The server is configured to refuse --%s\n",
1284                          op->longName) - 1;
1285         if (op->shortName) {
1286                 snprintf(err_buf + n, sizeof err_buf - n,
1287                          " (-%c)\n", op->shortName);
1288         }
1289 }
1290
1291 /* This is used to make sure that --daemon & --server cannot be aliased to
1292  * something else. These options have always disabled popt aliases for the
1293  * parsing of a daemon or server command-line, but we have to make sure that
1294  * these options cannot vanish so that the alias disabling can take effect. */
1295 static void popt_unalias(poptContext con, const char *opt)
1296 {
1297         struct poptAlias unalias;
1298
1299         unalias.longName = opt + 2; /* point past the leading "--" */
1300         unalias.shortName = '\0';
1301         unalias.argc = 1;
1302         unalias.argv = new_array(const char*, 1);
1303         unalias.argv[0] = strdup(opt);
1304
1305         poptAddAlias(con, unalias, 0);
1306 }
1307
1308 /**
1309  * Process command line arguments.  Called on both local and remote.
1310  *
1311  * @retval 1 if all options are OK; with globals set to appropriate
1312  * values
1313  *
1314  * @retval 0 on error, with err_buf containing an explanation
1315  **/
1316 int parse_arguments(int *argc_p, const char ***argv_p)
1317 {
1318         static poptContext pc;
1319         char *ref = lp_refuse_options(module_id);
1320         const char *arg, **argv = *argv_p;
1321         int argc = *argc_p;
1322         int opt;
1323         int orig_protect_args = protect_args;
1324
1325         if (argc == 0) {
1326                 strlcpy(err_buf, "argc is zero!\n", sizeof err_buf);
1327                 return 0;
1328         }
1329         if (ref && *ref)
1330                 set_refuse_options(ref);
1331         if (am_daemon) {
1332                 set_refuse_options("log-file*");
1333 #ifdef ICONV_OPTION
1334                 if (!*lp_charset(module_id))
1335                         set_refuse_options("iconv");
1336 #endif
1337                 set_refuse_options("write-devices");
1338         }
1339
1340 #ifdef ICONV_OPTION
1341         if (!am_daemon && protect_args <= 0 && (arg = getenv("RSYNC_ICONV")) != NULL && *arg)
1342                 iconv_opt = strdup(arg);
1343 #endif
1344
1345         /* TODO: Call poptReadDefaultConfig; handle errors. */
1346
1347         /* The context leaks in case of an error, but if there's a
1348          * problem we always exit anyhow. */
1349         if (pc)
1350                 poptFreeContext(pc);
1351         pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1352         if (!am_server) {
1353                 poptReadDefaultConfig(pc, 0);
1354                 popt_unalias(pc, "--daemon");
1355                 popt_unalias(pc, "--server");
1356         }
1357
1358         while ((opt = poptGetNextOpt(pc)) != -1) {
1359                 /* most options are handled automatically by popt;
1360                  * only special cases are returned and listed here. */
1361
1362                 switch (opt) {
1363                 case OPT_VERSION:
1364                         print_rsync_version(FINFO);
1365                         exit_cleanup(0);
1366
1367                 case OPT_SERVER:
1368                         if (!am_server) {
1369                                 /* Disable popt aliases on the server side and
1370                                  * then start parsing the options again. */
1371                                 poptFreeContext(pc);
1372                                 pc = poptGetContext(RSYNC_NAME, argc, argv,
1373                                                     long_options, 0);
1374                                 am_server = 1;
1375                         }
1376 #ifdef ICONV_OPTION
1377                         iconv_opt = NULL;
1378 #endif
1379                         break;
1380
1381                 case OPT_SENDER:
1382                         if (!am_server) {
1383                                 usage(FERROR);
1384                                 exit_cleanup(RERR_SYNTAX);
1385                         }
1386                         am_sender = 1;
1387                         break;
1388
1389                 case OPT_DAEMON:
1390                         if (am_daemon) {
1391                                 strlcpy(err_buf,
1392                                         "Attempt to hack rsync thwarted!\n",
1393                                         sizeof err_buf);
1394                                 return 0;
1395                         }
1396 #ifdef ICONV_OPTION
1397                         iconv_opt = NULL;
1398 #endif
1399                         protect_args = 0;
1400                         poptFreeContext(pc);
1401                         pc = poptGetContext(RSYNC_NAME, argc, argv,
1402                                             long_daemon_options, 0);
1403                         while ((opt = poptGetNextOpt(pc)) != -1) {
1404                                 char **cpp;
1405                                 switch (opt) {
1406                                 case 'h':
1407                                         daemon_usage(FINFO);
1408                                         exit_cleanup(0);
1409
1410                                 case 'M':
1411                                         arg = poptGetOptArg(pc);
1412                                         if (!strchr(arg, '=')) {
1413                                                 rprintf(FERROR,
1414                                                     "--dparam value is missing an '=': %s\n",
1415                                                     arg);
1416                                                 goto daemon_error;
1417                                         }
1418                                         cpp = EXPAND_ITEM_LIST(&dparam_list, char *, 4);
1419                                         *cpp = strdup(arg);
1420                                         break;
1421
1422                                 case 'v':
1423                                         verbose++;
1424                                         break;
1425
1426                                 default:
1427                                         rprintf(FERROR,
1428                                             "rsync: %s: %s (in daemon mode)\n",
1429                                             poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1430                                             poptStrerror(opt));
1431                                         goto daemon_error;
1432                                 }
1433                         }
1434
1435                         if (dparam_list.count && !set_dparams(1))
1436                                 exit_cleanup(RERR_SYNTAX);
1437
1438                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1439                                 snprintf(err_buf, sizeof err_buf,
1440                                          "the --temp-dir path is WAY too long.\n");
1441                                 return 0;
1442                         }
1443
1444                         if (!daemon_opt) {
1445                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
1446                             daemon_error:
1447                                 rprintf(FERROR,
1448                                     "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
1449                                 exit_cleanup(RERR_SYNTAX);
1450                         }
1451
1452                         *argv_p = argv = poptGetArgs(pc);
1453                         *argc_p = argc = count_args(argv);
1454                         am_starting_up = 0;
1455                         daemon_opt = 0;
1456                         am_daemon = 1;
1457                         return 1;
1458
1459                 case OPT_MODIFY_WINDOW:
1460                         /* The value has already been set by popt, but
1461                          * we need to remember that we're using a
1462                          * non-default setting. */
1463                         modify_window_set = 1;
1464                         break;
1465
1466                 case OPT_FILTER:
1467                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1468                                         rule_template(0), 0);
1469                         break;
1470
1471                 case OPT_EXCLUDE:
1472                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1473                                         rule_template(0), XFLG_OLD_PREFIXES);
1474                         break;
1475
1476                 case OPT_INCLUDE:
1477                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1478                                         rule_template(FILTRULE_INCLUDE), XFLG_OLD_PREFIXES);
1479                         break;
1480
1481                 case OPT_EXCLUDE_FROM:
1482                 case OPT_INCLUDE_FROM:
1483                         arg = poptGetOptArg(pc);
1484                         if (sanitize_paths)
1485                                 arg = sanitize_path(NULL, arg, NULL, 0, SP_DEFAULT);
1486                         if (daemon_filter_list.head) {
1487                                 int rej;
1488                                 char *cp = strdup(arg);
1489                                 if (!cp)
1490                                         out_of_memory("parse_arguments");
1491                                 if (!*cp)
1492                                         rej = 1;
1493                                 else {
1494                                         char *dir = cp + (*cp == '/' ? module_dirlen : 0);
1495                                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1496                                         rej = check_filter(&daemon_filter_list, FLOG, dir, 0) < 0;
1497                                 }
1498                                 free(cp);
1499                                 if (rej)
1500                                         goto options_rejected;
1501                         }
1502                         parse_filter_file(&filter_list, arg,
1503                                 rule_template(opt == OPT_INCLUDE_FROM ? FILTRULE_INCLUDE : 0),
1504                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
1505                         break;
1506
1507                 case 'a':
1508                         if (refused_archive_part) {
1509                                 create_refuse_error(refused_archive_part);
1510                                 return 0;
1511                         }
1512                         if (!recurse) /* preserve recurse == 2 */
1513                                 recurse = 1;
1514 #ifdef SUPPORT_LINKS
1515                         preserve_links = 1;
1516 #endif
1517                         preserve_perms = 1;
1518                         preserve_times = 1;
1519                         preserve_gid = 1;
1520                         preserve_uid = 1;
1521                         preserve_devices = 1;
1522                         preserve_specials = 1;
1523                         break;
1524
1525                 case 'D':
1526                         preserve_devices = preserve_specials = 1;
1527                         break;
1528
1529                 case OPT_NO_D:
1530                         preserve_devices = preserve_specials = 0;
1531                         break;
1532
1533                 case 'h':
1534                         human_readable++;
1535                         break;
1536
1537                 case 'H':
1538                         preserve_hard_links++;
1539                         break;
1540
1541                 case 'i':
1542                         itemize_changes++;
1543                         break;
1544
1545                 case 'v':
1546                         verbose++;
1547                         break;
1548
1549                 case 'y':
1550                         fuzzy_basis++;
1551                         break;
1552
1553                 case 'q':
1554                         quiet++;
1555                         break;
1556
1557                 case 'x':
1558                         one_file_system++;
1559                         break;
1560
1561                 case 'F':
1562                         switch (++F_option_cnt) {
1563                         case 1:
1564                                 parse_filter_str(&filter_list,": /.rsync-filter",rule_template(0),0);
1565                                 break;
1566                         case 2:
1567                                 parse_filter_str(&filter_list,"- .rsync-filter",rule_template(0),0);
1568                                 break;
1569                         }
1570                         break;
1571
1572                 case 'P':
1573                         if (refused_partial || refused_progress) {
1574                                 create_refuse_error(refused_partial
1575                                     ? refused_partial : refused_progress);
1576                                 return 0;
1577                         }
1578                         do_progress = 1;
1579                         keep_partial = 1;
1580                         break;
1581
1582                 case 'z':
1583                         do_compression++;
1584                         break;
1585
1586                 case 'M':
1587                         arg = poptGetOptArg(pc);
1588                         if (*arg != '-') {
1589                                 snprintf(err_buf, sizeof err_buf,
1590                                         "Remote option must start with a dash: %s\n", arg);
1591                                 return 0;
1592                         }
1593                         if (remote_option_cnt+2 >= remote_option_alloc) {
1594                                 remote_option_alloc += 16;
1595                                 remote_options = realloc_array(remote_options,
1596                                                         const char *, remote_option_alloc);
1597                                 if (!remote_options)
1598                                         out_of_memory("parse_arguments");
1599                                 if (!remote_option_cnt)
1600                                         remote_options[0] = "ARG0";
1601                         }
1602                         remote_options[++remote_option_cnt] = arg;
1603                         remote_options[remote_option_cnt+1] = NULL;
1604                         break;
1605
1606                 case OPT_WRITE_BATCH:
1607                         /* batch_name is already set */
1608                         write_batch = 1;
1609                         break;
1610
1611                 case OPT_ONLY_WRITE_BATCH:
1612                         /* batch_name is already set */
1613                         write_batch = -1;
1614                         break;
1615
1616                 case OPT_READ_BATCH:
1617                         /* batch_name is already set */
1618                         read_batch = 1;
1619                         break;
1620
1621                 case OPT_NO_ICONV:
1622 #ifdef ICONV_OPTION
1623                         iconv_opt = NULL;
1624 #endif
1625                         break;
1626
1627                 case OPT_MAX_SIZE:
1628                         if ((max_size = parse_size_arg(&max_size_arg, 'b')) < 0) {
1629                                 snprintf(err_buf, sizeof err_buf,
1630                                         "--max-size value is invalid: %s\n",
1631                                         max_size_arg);
1632                                 return 0;
1633                         }
1634                         break;
1635
1636                 case OPT_MIN_SIZE:
1637                         if ((min_size = parse_size_arg(&min_size_arg, 'b')) < 0) {
1638                                 snprintf(err_buf, sizeof err_buf,
1639                                         "--min-size value is invalid: %s\n",
1640                                         min_size_arg);
1641                                 return 0;
1642                         }
1643                         break;
1644
1645                 case OPT_BWLIMIT:
1646                         {
1647                                 OFF_T limit = parse_size_arg(&bwlimit_arg, 'K');
1648                                 if (limit < 0) {
1649                                         snprintf(err_buf, sizeof err_buf,
1650                                                 "--bwlimit value is invalid: %s\n", bwlimit_arg);
1651                                         return 0;
1652                                 }
1653                                 bwlimit = (limit + 512) / 1024;
1654                                 if (limit && !bwlimit) {
1655                                         snprintf(err_buf, sizeof err_buf,
1656                                                 "--bwlimit value is too small: %s\n", bwlimit_arg);
1657                                         return 0;
1658                                 }
1659                         }
1660                         break;
1661
1662                 case OPT_APPEND:
1663                         if (am_server)
1664                                 append_mode++;
1665                         else
1666                                 append_mode = 1;
1667                         break;
1668
1669                 case OPT_LINK_DEST:
1670 #ifdef SUPPORT_HARD_LINKS
1671                         link_dest = 1;
1672                         dest_option = "--link-dest";
1673                         goto set_dest_dir;
1674 #else
1675                         snprintf(err_buf, sizeof err_buf,
1676                                  "hard links are not supported on this %s\n",
1677                                  am_server ? "server" : "client");
1678                         return 0;
1679 #endif
1680
1681                 case OPT_COPY_DEST:
1682                         copy_dest = 1;
1683                         dest_option = "--copy-dest";
1684                         goto set_dest_dir;
1685
1686                 case OPT_COMPARE_DEST:
1687                         compare_dest = 1;
1688                         dest_option = "--compare-dest";
1689                 set_dest_dir:
1690                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1691                                 snprintf(err_buf, sizeof err_buf,
1692                                         "ERROR: at most %d %s args may be specified\n",
1693                                         MAX_BASIS_DIRS, dest_option);
1694                                 return 0;
1695                         }
1696                         /* We defer sanitizing this arg until we know what
1697                          * our destination directory is going to be. */
1698                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1699                         break;
1700
1701                 case OPT_CHMOD:
1702                         arg = poptGetOptArg(pc);
1703                         if (!parse_chmod(arg, &chmod_modes)) {
1704                                 snprintf(err_buf, sizeof err_buf,
1705                                     "Invalid argument passed to --chmod (%s)\n",
1706                                     arg);
1707                                 return 0;
1708                         }
1709                         break;
1710
1711                 case OPT_INFO:
1712                         arg = poptGetOptArg(pc);
1713                         parse_output_words(info_words, info_levels, arg, USER_PRIORITY);
1714                         break;
1715
1716                 case OPT_DEBUG:
1717                         arg = poptGetOptArg(pc);
1718                         parse_output_words(debug_words, debug_levels, arg, USER_PRIORITY);
1719                         break;
1720
1721                 case OPT_USERMAP:
1722                         if (usermap) {
1723                                 if (usermap_via_chown) {
1724                                         snprintf(err_buf, sizeof err_buf,
1725                                             "--usermap conflicts with prior --chown.\n");
1726                                         return 0;
1727                                 }
1728                                 snprintf(err_buf, sizeof err_buf,
1729                                     "You can only specify --usermap once.\n");
1730                                 return 0;
1731                         }
1732                         usermap = (char *)poptGetOptArg(pc);
1733                         usermap_via_chown = False;
1734                         break;
1735
1736                 case OPT_GROUPMAP:
1737                         if (groupmap) {
1738                                 if (groupmap_via_chown) {
1739                                         snprintf(err_buf, sizeof err_buf,
1740                                             "--groupmap conflicts with prior --chown.\n");
1741                                         return 0;
1742                                 }
1743                                 snprintf(err_buf, sizeof err_buf,
1744                                     "You can only specify --groupmap once.\n");
1745                                 return 0;
1746                         }
1747                         groupmap = (char *)poptGetOptArg(pc);
1748                         groupmap_via_chown = False;
1749                         break;
1750
1751                 case OPT_CHOWN: {
1752                         const char *chown = poptGetOptArg(pc);
1753                         int len;
1754                         if ((arg = strchr(chown, ':')) != NULL)
1755                                 len = arg++ - chown;
1756                         else
1757                                 len = strlen(chown);
1758                         if (len) {
1759                                 if (usermap) {
1760                                         if (!usermap_via_chown) {
1761                                                 snprintf(err_buf, sizeof err_buf,
1762                                                     "--chown conflicts with prior --usermap.\n");
1763                                                 return 0;
1764                                         }
1765                                         snprintf(err_buf, sizeof err_buf,
1766                                             "You can only specify a user-affecting --chown once.\n");
1767                                         return 0;
1768                                 }
1769                                 if (asprintf(&usermap, "*:%.*s", len, chown) < 0)
1770                                         out_of_memory("parse_arguments");
1771                                 usermap_via_chown = True;
1772                         }
1773                         if (arg && *arg) {
1774                                 if (groupmap) {
1775                                         if (!groupmap_via_chown) {
1776                                                 snprintf(err_buf, sizeof err_buf,
1777                                                     "--chown conflicts with prior --groupmap.\n");
1778                                                 return 0;
1779                                         }
1780                                         snprintf(err_buf, sizeof err_buf,
1781                                             "You can only specify a group-affecting --chown once.\n");
1782                                         return 0;
1783                                 }
1784                                 if (asprintf(&groupmap, "*:%s", arg) < 0)
1785                                         out_of_memory("parse_arguments");
1786                                 groupmap_via_chown = True;
1787                         }
1788                         break;
1789                 }
1790
1791                 case OPT_HELP:
1792                         usage(FINFO);
1793                         exit_cleanup(0);
1794
1795                 case 'A':
1796 #ifdef SUPPORT_ACLS
1797                         preserve_acls = 1;
1798                         preserve_perms = 1;
1799                         break;
1800 #else
1801                         /* FIXME: this should probably be ignored with a
1802                          * warning and then countermeasures taken to
1803                          * restrict group and other access in the presence
1804                          * of any more restrictive ACLs, but this is safe
1805                          * for now */
1806                         snprintf(err_buf,sizeof(err_buf),
1807                                  "ACLs are not supported on this %s\n",
1808                                  am_server ? "server" : "client");
1809                         return 0;
1810 #endif
1811
1812                 case 'X':
1813 #ifdef SUPPORT_XATTRS
1814                         preserve_xattrs++;
1815                         break;
1816 #else
1817                         snprintf(err_buf,sizeof(err_buf),
1818                                  "extended attributes are not supported on this %s\n",
1819                                  am_server ? "server" : "client");
1820                         return 0;
1821 #endif
1822
1823                 default:
1824                         /* A large opt value means that set_refuse_options()
1825                          * turned this option off. */
1826                         if (opt >= OPT_REFUSED_BASE) {
1827                                 create_refuse_error(opt);
1828                                 return 0;
1829                         }
1830                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
1831                                  am_server ? "on remote machine: " : "",
1832                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1833                                  poptStrerror(opt));
1834                         return 0;
1835                 }
1836         }
1837
1838         if (protect_args < 0) {
1839                 if (am_server)
1840                         protect_args = 0;
1841                 else if ((arg = getenv("RSYNC_PROTECT_ARGS")) != NULL && *arg)
1842                         protect_args = atoi(arg) ? 1 : 0;
1843                 else {
1844 #ifdef RSYNC_USE_PROTECTED_ARGS
1845                         protect_args = 1;
1846 #else
1847                         protect_args = 0;
1848 #endif
1849                 }
1850         }
1851
1852         if (checksum_choice && strcmp(checksum_choice, "auto") != 0 && strcmp(checksum_choice, "auto,auto") != 0) {
1853                 /* Call this early to verify the args and figure out if we need to force
1854                  * --whole-file. Note that the parse function will get called again later,
1855                  * just in case an "auto" choice needs to know the protocol_version. */
1856                 if (parse_checksum_choice())
1857                         whole_file = 1;
1858         } else
1859                 checksum_choice = NULL;
1860
1861         if (human_readable > 1 && argc == 2 && !am_server) {
1862                 /* Allow the old meaning of 'h' (--help) on its own. */
1863                 usage(FINFO);
1864                 exit_cleanup(0);
1865         }
1866
1867         if (do_compression || def_compress_level != NOT_SPECIFIED) {
1868                 if (def_compress_level == NOT_SPECIFIED)
1869                         def_compress_level = Z_DEFAULT_COMPRESSION;
1870                 else if (def_compress_level < Z_DEFAULT_COMPRESSION || def_compress_level > Z_BEST_COMPRESSION) {
1871                         snprintf(err_buf, sizeof err_buf, "--compress-level value is invalid: %d\n",
1872                                  def_compress_level);
1873                         return 0;
1874                 } else if (def_compress_level == Z_NO_COMPRESSION)
1875                         do_compression = 0;
1876                 else if (!do_compression)
1877                         do_compression = 1;
1878                 if (do_compression && refused_compress) {
1879                         create_refuse_error(refused_compress);
1880                         return 0;
1881                 }
1882 #ifdef EXTERNAL_ZLIB
1883                 if (do_compression == 1) {
1884                         snprintf(err_buf, sizeof err_buf,
1885                                 "This rsync lacks old-style --compress due to its external zlib.  Try -zz.\n");
1886                         if (am_server)
1887                                 return 0;
1888                         fprintf(stderr, "%s" "Continuing without compression.\n\n", err_buf);
1889                         do_compression = 0;
1890                 }
1891 #endif
1892         }
1893
1894 #ifdef HAVE_SETVBUF
1895         if (outbuf_mode && !am_server) {
1896                 int mode = *(uchar *)outbuf_mode;
1897                 if (islower(mode))
1898                         mode = toupper(mode);
1899                 fflush(stdout); /* Just in case... */
1900                 switch (mode) {
1901                 case 'N': /* None */
1902                 case 'U': /* Unbuffered */
1903                         mode = _IONBF;
1904                         break;
1905                 case 'L': /* Line */
1906                         mode = _IOLBF;
1907                         break;
1908                 case 'B': /* Block */
1909                 case 'F': /* Full */
1910                         mode = _IOFBF;
1911                         break;
1912                 default:
1913                         snprintf(err_buf, sizeof err_buf,
1914                                 "Invalid --outbuf setting -- specify N, L, or B.\n");
1915                         return 0;
1916                 }
1917                 setvbuf(stdout, (char *)NULL, mode, 0);
1918         }
1919
1920         if (msgs2stderr) {
1921                 /* Make stderr line buffered for better sharing of the stream. */
1922                 fflush(stderr); /* Just in case... */
1923                 setvbuf(stderr, (char *)NULL, _IOLBF, 0);
1924         }
1925 #endif
1926
1927         set_output_verbosity(verbose, DEFAULT_PRIORITY);
1928
1929         if (do_stats) {
1930                 parse_output_words(info_words, info_levels,
1931                         verbose > 1 ? "stats3" : "stats2", DEFAULT_PRIORITY);
1932         }
1933
1934 #ifdef ICONV_OPTION
1935         if (iconv_opt && protect_args != 2) {
1936                 if (!am_server && strcmp(iconv_opt, "-") == 0)
1937                         iconv_opt = NULL;
1938                 else
1939                         need_unsorted_flist = 1;
1940         }
1941         if (refused_no_iconv && !iconv_opt) {
1942                 create_refuse_error(refused_no_iconv);
1943                 return 0;
1944         }
1945 #endif
1946
1947         if (fuzzy_basis > 1)
1948                 fuzzy_basis = basis_dir_cnt + 1;
1949
1950         /* Don't let the client reset protect_args if it was already processed */
1951         if (orig_protect_args == 2 && am_server)
1952                 protect_args = orig_protect_args;
1953
1954         if (protect_args == 1 && am_server)
1955                 return 1;
1956
1957         *argv_p = argv = poptGetArgs(pc);
1958         *argc_p = argc = count_args(argv);
1959
1960 #ifndef SUPPORT_LINKS
1961         if (preserve_links && !am_sender) {
1962                 snprintf(err_buf, sizeof err_buf,
1963                          "symlinks are not supported on this %s\n",
1964                          am_server ? "server" : "client");
1965                 return 0;
1966         }
1967 #endif
1968
1969 #ifndef SUPPORT_HARD_LINKS
1970         if (preserve_hard_links) {
1971                 snprintf(err_buf, sizeof err_buf,
1972                          "hard links are not supported on this %s\n",
1973                          am_server ? "server" : "client");
1974                 return 0;
1975         }
1976 #endif
1977
1978 #ifdef SUPPORT_XATTRS
1979         if (am_root < 0 && preserve_xattrs > 1) {
1980                 snprintf(err_buf, sizeof err_buf,
1981                          "--fake-super conflicts with -XX\n");
1982                 return 0;
1983         }
1984 #else
1985         if (am_root < 0) {
1986                 snprintf(err_buf, sizeof err_buf,
1987                          "--fake-super requires an rsync with extended attributes enabled\n");
1988                 return 0;
1989         }
1990 #endif
1991
1992         if (block_size) {
1993                 /* We may not know the real protocol_version at this point if this is the client
1994                  * option parsing, but we still want to check it so that the client can specify
1995                  * a --protocol=29 option with a larger block size. */
1996                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
1997
1998                 if (block_size > max_blength) {
1999                         snprintf(err_buf, sizeof err_buf,
2000                                  "--block-size=%lu is too large (max: %u)\n", block_size, max_blength);
2001                         return 0;
2002                 }
2003         }
2004
2005         if (write_batch && read_batch) {
2006                 snprintf(err_buf, sizeof err_buf,
2007                         "--write-batch and --read-batch can not be used together\n");
2008                 return 0;
2009         }
2010         if (write_batch > 0 || read_batch) {
2011                 if (am_server) {
2012                         rprintf(FINFO,
2013                                 "ignoring --%s-batch option sent to server\n",
2014                                 write_batch ? "write" : "read");
2015                         /* We don't actually exit_cleanup(), so that we can
2016                          * still service older version clients that still send
2017                          * batch args to server. */
2018                         read_batch = write_batch = 0;
2019                         batch_name = NULL;
2020                 } else if (dry_run)
2021                         write_batch = 0;
2022         } else if (write_batch < 0 && dry_run)
2023                 write_batch = 0;
2024         if (read_batch && files_from) {
2025                 snprintf(err_buf, sizeof err_buf,
2026                         "--read-batch cannot be used with --files-from\n");
2027                 return 0;
2028         }
2029         if (read_batch && remove_source_files) {
2030                 snprintf(err_buf, sizeof err_buf,
2031                         "--read-batch cannot be used with --remove-%s-files\n",
2032                         remove_source_files == 1 ? "source" : "sent");
2033                 return 0;
2034         }
2035         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
2036                 snprintf(err_buf, sizeof err_buf,
2037                         "the batch-file name must be %d characters or less.\n",
2038                         MAX_BATCH_NAME_LEN);
2039                 return 0;
2040         }
2041
2042         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
2043                 snprintf(err_buf, sizeof err_buf,
2044                          "the --temp-dir path is WAY too long.\n");
2045                 return 0;
2046         }
2047
2048         if (max_delete < 0 && max_delete != INT_MIN) {
2049                 /* Negative numbers are treated as "no deletions". */
2050                 max_delete = 0;
2051         }
2052
2053         if (compare_dest + copy_dest + link_dest > 1) {
2054                 snprintf(err_buf, sizeof err_buf,
2055                         "You may not mix --compare-dest, --copy-dest, and --link-dest.\n");
2056                 return 0;
2057         }
2058
2059         if (files_from) {
2060                 if (recurse == 1) /* preserve recurse == 2 */
2061                         recurse = 0;
2062                 if (xfer_dirs < 0)
2063                         xfer_dirs = 1;
2064         }
2065
2066         if (argc < 2 && !read_batch && !am_server)
2067                 list_only |= 1;
2068
2069         if (xfer_dirs >= 4) {
2070                 parse_filter_str(&filter_list, "- /*/*", rule_template(0), 0);
2071                 recurse = xfer_dirs = 1;
2072         } else if (recurse)
2073                 xfer_dirs = 1;
2074         else if (xfer_dirs < 0)
2075                 xfer_dirs = list_only ? 1 : 0;
2076
2077         if (relative_paths < 0)
2078                 relative_paths = files_from? 1 : 0;
2079         if (!relative_paths)
2080                 implied_dirs = 0;
2081
2082         if (delete_before + !!delete_during + delete_after > 1) {
2083                 snprintf(err_buf, sizeof err_buf,
2084                         "You may not combine multiple --delete-WHEN options.\n");
2085                 return 0;
2086         }
2087         if (delete_before || delete_during || delete_after)
2088                 delete_mode = 1;
2089         else if (delete_mode || delete_excluded) {
2090                 /* Only choose now between before & during if one is refused. */
2091                 if (refused_delete_before) {
2092                         if (!refused_delete_during)
2093                                 delete_during = 1;
2094                         else {
2095                                 create_refuse_error(refused_delete_before);
2096                                 return 0;
2097                         }
2098                 } else if (refused_delete_during)
2099                         delete_before = 1;
2100                 delete_mode = 1;
2101         }
2102         if (!xfer_dirs && delete_mode) {
2103                 snprintf(err_buf, sizeof err_buf,
2104                         "--delete does not work without --recursive (-r) or --dirs (-d).\n");
2105                 return 0;
2106         }
2107
2108         if (missing_args == 3) /* simplify if both options were specified */
2109                 missing_args = 2;
2110         if (refused_delete && (delete_mode || missing_args == 2)) {
2111                 create_refuse_error(refused_delete);
2112                 return 0;
2113         }
2114
2115         if (remove_source_files) {
2116                 /* We only want to infer this refusal of --remove-source-files
2117                  * via the refusal of "delete", not any of the "delete-FOO"
2118                  * options. */
2119                 if (refused_delete && am_sender) {
2120                         create_refuse_error(refused_delete);
2121                         return 0;
2122                 }
2123                 need_messages_from_generator = 1;
2124         }
2125
2126         if (munge_symlinks && !am_daemon) {
2127                 STRUCT_STAT st;
2128                 char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */
2129                 strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */
2130                 if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) {
2131                         rprintf(FERROR, "Symlink munging is unsafe when a %s directory exists.\n",
2132                                 prefix);
2133                         exit_cleanup(RERR_UNSUPPORTED);
2134                 }
2135         }
2136
2137         if (sanitize_paths) {
2138                 int i;
2139                 for (i = argc; i-- > 0; )
2140                         argv[i] = sanitize_path(NULL, argv[i], "", 0, SP_KEEP_DOT_DIRS);
2141                 if (tmpdir)
2142                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, SP_DEFAULT);
2143                 if (backup_dir)
2144                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, SP_DEFAULT);
2145         }
2146         if (daemon_filter_list.head && !am_sender) {
2147                 filter_rule_list *elp = &daemon_filter_list;
2148                 if (tmpdir) {
2149                         char *dir;
2150                         if (!*tmpdir)
2151                                 goto options_rejected;
2152                         dir = tmpdir + (*tmpdir == '/' ? module_dirlen : 0);
2153                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2154                         if (check_filter(elp, FLOG, dir, 1) < 0)
2155                                 goto options_rejected;
2156                 }
2157                 if (backup_dir) {
2158                         char *dir;
2159                         if (!*backup_dir)
2160                                 goto options_rejected;
2161                         dir = backup_dir + (*backup_dir == '/' ? module_dirlen : 0);
2162                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2163                         if (check_filter(elp, FLOG, dir, 1) < 0)
2164                                 goto options_rejected;
2165                 }
2166         }
2167
2168         if (!backup_suffix)
2169                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
2170         backup_suffix_len = strlen(backup_suffix);
2171         if (strchr(backup_suffix, '/') != NULL) {
2172                 snprintf(err_buf, sizeof err_buf,
2173                         "--suffix cannot contain slashes: %s\n",
2174                         backup_suffix);
2175                 return 0;
2176         }
2177         if (backup_dir) {
2178                 size_t len;
2179                 while (*backup_dir == '.' && backup_dir[1] == '/')
2180                         backup_dir += 2;
2181                 if (*backup_dir == '.' && backup_dir[1] == '\0')
2182                         backup_dir++;
2183                 len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
2184                 if (len > sizeof backup_dir_buf - 128) {
2185                         snprintf(err_buf, sizeof err_buf,
2186                                 "the --backup-dir path is WAY too long.\n");
2187                         return 0;
2188                 }
2189                 backup_dir_len = (int)len;
2190                 if (!backup_dir_len) {
2191                         backup_dir_len = -1;
2192                         backup_dir = NULL;
2193                 } else if (backup_dir_buf[backup_dir_len - 1] != '/') {
2194                         backup_dir_buf[backup_dir_len++] = '/';
2195                         backup_dir_buf[backup_dir_len] = '\0';
2196                 }
2197                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
2198         }
2199         if (backup_dir) {
2200                 /* No need for a suffix or a protect rule. */
2201         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
2202                 snprintf(err_buf, sizeof err_buf,
2203                         "--suffix cannot be empty %s\n", backup_dir_len < 0
2204                         ? "when --backup-dir is the same as the dest dir"
2205                         : "without a --backup-dir");
2206                 return 0;
2207         } else if (make_backups && delete_mode && !delete_excluded && !am_server) {
2208                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
2209                         "P *%s", backup_suffix);
2210                 parse_filter_str(&filter_list, backup_dir_buf, rule_template(0), 0);
2211         }
2212
2213         if (preserve_times) {
2214                 preserve_times = PRESERVE_FILE_TIMES;
2215                 if (!omit_dir_times)
2216                         preserve_times |= PRESERVE_DIR_TIMES;
2217 #ifdef CAN_SET_SYMLINK_TIMES
2218                 if (!omit_link_times)
2219                         preserve_times |= PRESERVE_LINK_TIMES;
2220 #endif
2221         }
2222
2223         if (make_backups && !backup_dir) {
2224                 omit_dir_times = 0; /* Implied, so avoid -O to sender. */
2225                 preserve_times &= ~PRESERVE_DIR_TIMES;
2226         }
2227
2228         if (stdout_format) {
2229                 if (am_server && log_format_has(stdout_format, 'I'))
2230                         stdout_format_has_i = 2;
2231                 else if (log_format_has(stdout_format, 'i'))
2232                         stdout_format_has_i = itemize_changes | 1;
2233                 if (!log_format_has(stdout_format, 'b')
2234                  && !log_format_has(stdout_format, 'c')
2235                  && !log_format_has(stdout_format, 'C'))
2236                         log_before_transfer = !am_server;
2237         } else if (itemize_changes) {
2238                 stdout_format = "%i %n%L";
2239                 stdout_format_has_i = itemize_changes;
2240                 log_before_transfer = !am_server;
2241         }
2242
2243         if (do_progress && !am_server) {
2244                 if (!log_before_transfer && INFO_EQ(NAME, 0))
2245                         parse_output_words(info_words, info_levels, "name", DEFAULT_PRIORITY);
2246                 parse_output_words(info_words, info_levels, "flist2,progress", DEFAULT_PRIORITY);
2247         }
2248
2249         if (dry_run)
2250                 do_xfers = 0;
2251
2252         set_io_timeout(io_timeout);
2253
2254         if (INFO_GTE(NAME, 1) && !stdout_format) {
2255                 stdout_format = "%n%L";
2256                 log_before_transfer = !am_server;
2257         }
2258         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
2259                 stdout_format_has_o_or_i = 1;
2260
2261         if (logfile_name && !am_daemon) {
2262                 if (!logfile_format) {
2263                         logfile_format = "%i %n%L";
2264                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
2265                 } else {
2266                         if (log_format_has(logfile_format, 'i'))
2267                                 logfile_format_has_i = 1;
2268                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
2269                                 logfile_format_has_o_or_i = 1;
2270                 }
2271                 log_init(0);
2272         } else if (!am_daemon)
2273                 logfile_format = NULL;
2274
2275         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
2276                 bwlimit = daemon_bwlimit;
2277         if (bwlimit) {
2278                 bwlimit_writemax = (size_t)bwlimit * 128;
2279                 if (bwlimit_writemax < 512)
2280                         bwlimit_writemax = 512;
2281         }
2282
2283         if (append_mode) {
2284                 if (whole_file > 0) {
2285                         snprintf(err_buf, sizeof err_buf,
2286                                  "--append cannot be used with --whole-file\n");
2287                         return 0;
2288                 }
2289                 if (refused_inplace) {
2290                         create_refuse_error(refused_inplace);
2291                         return 0;
2292                 }
2293                 inplace = 1;
2294         }
2295
2296         if (write_devices) {
2297                 if (refused_inplace) {
2298                         create_refuse_error(refused_inplace);
2299                         return 0;
2300                 }
2301                 inplace = 1;
2302         }
2303
2304         if (delay_updates && !partial_dir)
2305                 partial_dir = tmp_partialdir;
2306
2307         if (inplace) {
2308 #ifdef HAVE_FTRUNCATE
2309                 if (partial_dir) {
2310                         snprintf(err_buf, sizeof err_buf,
2311                                  "--%s cannot be used with --%s\n",
2312                                  append_mode ? "append" : "inplace",
2313                                  delay_updates ? "delay-updates" : "partial-dir");
2314                         return 0;
2315                 }
2316                 /* --inplace implies --partial for refusal purposes, but we
2317                  * clear the keep_partial flag for internal logic purposes. */
2318                 if (refused_partial) {
2319                         create_refuse_error(refused_partial);
2320                         return 0;
2321                 }
2322                 keep_partial = 0;
2323 #else
2324                 snprintf(err_buf, sizeof err_buf,
2325                          "--%s is not supported on this %s\n",
2326                          append_mode ? "append" : "inplace",
2327                          am_server ? "server" : "client");
2328                 return 0;
2329 #endif
2330         } else {
2331                 if (keep_partial && !partial_dir && !am_server) {
2332                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
2333                                 partial_dir = strdup(arg);
2334                 }
2335                 if (partial_dir) {
2336                         if (*partial_dir)
2337                                 clean_fname(partial_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2338                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
2339                                 partial_dir = NULL;
2340                         if (!partial_dir && refused_partial) {
2341                                 create_refuse_error(refused_partial);
2342                                 return 0;
2343                         }
2344                         keep_partial = 1;
2345                 }
2346         }
2347
2348         if (files_from) {
2349                 char *h, *p;
2350                 int q;
2351                 if (argc > 2 || (!am_daemon && !am_server && argc == 1)) {
2352                         usage(FERROR);
2353                         exit_cleanup(RERR_SYNTAX);
2354                 }
2355                 if (strcmp(files_from, "-") == 0) {
2356                         filesfrom_fd = 0;
2357                         if (am_server)
2358                                 filesfrom_host = ""; /* reading from socket */
2359                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
2360                         if (am_server) {
2361                                 snprintf(err_buf, sizeof err_buf,
2362                                         "The --files-from sent to the server cannot specify a host.\n");
2363                                 return 0;
2364                         }
2365                         files_from = p;
2366                         filesfrom_host = h;
2367                         if (strcmp(files_from, "-") == 0) {
2368                                 snprintf(err_buf, sizeof err_buf,
2369                                         "Invalid --files-from remote filename\n");
2370                                 return 0;
2371                         }
2372                 } else {
2373                         if (sanitize_paths)
2374                                 files_from = sanitize_path(NULL, files_from, NULL, 0, SP_DEFAULT);
2375                         if (daemon_filter_list.head) {
2376                                 char *dir;
2377                                 if (!*files_from)
2378                                         goto options_rejected;
2379                                 dir = files_from + (*files_from == '/' ? module_dirlen : 0);
2380                                 clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2381                                 if (check_filter(&daemon_filter_list, FLOG, dir, 0) < 0)
2382                                         goto options_rejected;
2383                         }
2384                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
2385                         if (filesfrom_fd < 0) {
2386                                 snprintf(err_buf, sizeof err_buf,
2387                                         "failed to open files-from file %s: %s\n",
2388                                         files_from, strerror(errno));
2389                                 return 0;
2390                         }
2391                 }
2392         }
2393
2394         am_starting_up = 0;
2395
2396         return 1;
2397
2398   options_rejected:
2399         snprintf(err_buf, sizeof err_buf,
2400                 "Your options have been rejected by the server.\n");
2401         return 0;
2402 }
2403
2404
2405 /**
2406  * Construct a filtered list of options to pass through from the
2407  * client to the server.
2408  *
2409  * This involves setting options that will tell the server how to
2410  * behave, and also filtering out options that are processed only
2411  * locally.
2412  **/
2413 void server_options(char **args, int *argc_p)
2414 {
2415         static char argstr[64];
2416         int ac = *argc_p;
2417         uchar where;
2418         char *arg;
2419         int i, x;
2420
2421         /* This should always remain first on the server's command-line. */
2422         args[ac++] = "--server";
2423
2424         if (daemon_over_rsh > 0) {
2425                 args[ac++] = "--daemon";
2426                 *argc_p = ac;
2427                 /* if we're passing --daemon, we're done */
2428                 return;
2429         }
2430
2431         if (!am_sender)
2432                 args[ac++] = "--sender";
2433
2434         x = 1;
2435         argstr[0] = '-';
2436
2437         if (protect_args)
2438                 argstr[x++] = 's';
2439
2440         for (i = 0; i < verbose; i++)
2441                 argstr[x++] = 'v';
2442
2443         /* the -q option is intentionally left out */
2444         if (make_backups)
2445                 argstr[x++] = 'b';
2446         if (update_only)
2447                 argstr[x++] = 'u';
2448         if (!do_xfers) /* Note: NOT "dry_run"! */
2449                 argstr[x++] = 'n';
2450         if (preserve_links)
2451                 argstr[x++] = 'l';
2452         if ((xfer_dirs >= 2 && xfer_dirs < 4)
2453          || (xfer_dirs && !recurse && (list_only || (delete_mode && am_sender))))
2454                 argstr[x++] = 'd';
2455         if (am_sender) {
2456                 if (keep_dirlinks)
2457                         argstr[x++] = 'K';
2458                 if (prune_empty_dirs)
2459                         argstr[x++] = 'm';
2460                 if (omit_dir_times)
2461                         argstr[x++] = 'O';
2462                 if (omit_link_times)
2463                         argstr[x++] = 'J';
2464                 if (fuzzy_basis) {
2465                         argstr[x++] = 'y';
2466                         if (fuzzy_basis > 1)
2467                                 argstr[x++] = 'y';
2468                 }
2469         } else {
2470                 if (copy_links)
2471                         argstr[x++] = 'L';
2472                 if (copy_dirlinks)
2473                         argstr[x++] = 'k';
2474         }
2475
2476         if (whole_file > 0)
2477                 argstr[x++] = 'W';
2478         /* We don't need to send --no-whole-file, because it's the
2479          * default for remote transfers, and in any case old versions
2480          * of rsync will not understand it. */
2481
2482         if (preserve_hard_links) {
2483                 argstr[x++] = 'H';
2484                 if (preserve_hard_links > 1)
2485                         argstr[x++] = 'H';
2486         }
2487         if (preserve_uid)
2488                 argstr[x++] = 'o';
2489         if (preserve_gid)
2490                 argstr[x++] = 'g';
2491         if (preserve_devices) /* ignore preserve_specials here */
2492                 argstr[x++] = 'D';
2493         if (preserve_times)
2494                 argstr[x++] = 't';
2495         if (preserve_perms)
2496                 argstr[x++] = 'p';
2497         else if (preserve_executability && am_sender)
2498                 argstr[x++] = 'E';
2499 #ifdef SUPPORT_ACLS
2500         if (preserve_acls)
2501                 argstr[x++] = 'A';
2502 #endif
2503 #ifdef SUPPORT_XATTRS
2504         if (preserve_xattrs) {
2505                 argstr[x++] = 'X';
2506                 if (preserve_xattrs > 1)
2507                         argstr[x++] = 'X';
2508         }
2509 #endif
2510         if (recurse)
2511                 argstr[x++] = 'r';
2512         if (always_checksum)
2513                 argstr[x++] = 'c';
2514         if (cvs_exclude)
2515                 argstr[x++] = 'C';
2516         if (ignore_times)
2517                 argstr[x++] = 'I';
2518         if (relative_paths)
2519                 argstr[x++] = 'R';
2520         if (one_file_system) {
2521                 argstr[x++] = 'x';
2522                 if (one_file_system > 1)
2523                         argstr[x++] = 'x';
2524         }
2525         if (sparse_files)
2526                 argstr[x++] = 'S';
2527         if (do_compression == 1)
2528                 argstr[x++] = 'z';
2529
2530         set_allow_inc_recurse();
2531
2532         /* We don't really know the actual protocol_version at this point,
2533          * but checking the pre-negotiated value allows the user to use a
2534          * --protocol=29 override to avoid the use of this -eFLAGS opt. */
2535         if (protocol_version >= 30) {
2536                 /* Use "eFlags" alias so that cull_options doesn't think that these are no-arg option letters. */
2537 #define eFlags argstr
2538                 /* We make use of the -e option to let the server know about
2539                  * any pre-release protocol version && some behavior flags. */
2540                 eFlags[x++] = 'e';
2541 #if SUBPROTOCOL_VERSION != 0
2542                 if (protocol_version == PROTOCOL_VERSION) {
2543                         x += snprintf(argstr+x, sizeof argstr - x,
2544                                       "%d.%d",
2545                                       PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
2546                 } else
2547 #endif
2548                         eFlags[x++] = '.';
2549                 if (allow_inc_recurse)
2550                         eFlags[x++] = 'i';
2551 #ifdef CAN_SET_SYMLINK_TIMES
2552                 eFlags[x++] = 'L'; /* symlink time-setting support */
2553 #endif
2554 #ifdef ICONV_OPTION
2555                 eFlags[x++] = 's'; /* symlink iconv translation support */
2556 #endif
2557                 eFlags[x++] = 'f'; /* flist I/O-error safety support */
2558                 eFlags[x++] = 'x'; /* xattr hardlink optimization not desired */
2559                 eFlags[x++] = 'C'; /* support checksum seed order fix */
2560 #undef eFlags
2561         }
2562
2563         if (x >= (int)sizeof argstr) { /* Not possible... */
2564                 rprintf(FERROR, "argstr overflow in server_options().\n");
2565                 exit_cleanup(RERR_MALLOC);
2566         }
2567
2568         argstr[x] = '\0';
2569
2570         if (x > 1)
2571                 args[ac++] = argstr;
2572
2573 #ifdef ICONV_OPTION
2574         if (iconv_opt) {
2575                 char *set = strchr(iconv_opt, ',');
2576                 if (set)
2577                         set++;
2578                 else
2579                         set = iconv_opt;
2580                 if (asprintf(&arg, "--iconv=%s", set) < 0)
2581                         goto oom;
2582                 args[ac++] = arg;
2583         }
2584 #endif
2585
2586         if (protect_args && !local_server) /* unprotected args stop here */
2587                 args[ac++] = NULL;
2588
2589         if (list_only > 1)
2590                 args[ac++] = "--list-only";
2591
2592         /* This makes sure that the remote rsync can handle deleting with -d
2593          * sans -r because the --no-r option was added at the same time. */
2594         if (xfer_dirs && !recurse && delete_mode && am_sender)
2595                 args[ac++] = "--no-r";
2596
2597         if (do_compression && def_compress_level != Z_DEFAULT_COMPRESSION) {
2598                 if (asprintf(&arg, "--compress-level=%d", def_compress_level) < 0)
2599                         goto oom;
2600                 args[ac++] = arg;
2601         }
2602
2603         if (preserve_devices) {
2604                 /* Note: sending "--devices" would not be backward-compatible. */
2605                 if (!preserve_specials)
2606                         args[ac++] = "--no-specials"; /* -D is already set. */
2607         } else if (preserve_specials)
2608                 args[ac++] = "--specials";
2609
2610         /* The server side doesn't use our log-format, but in certain
2611          * circumstances they need to know a little about the option. */
2612         if (stdout_format && am_sender) {
2613                 /* Use --log-format, not --out-format, for compatibility. */
2614                 if (stdout_format_has_i > 1)
2615                         args[ac++] = "--log-format=%i%I";
2616                 else if (stdout_format_has_i)
2617                         args[ac++] = "--log-format=%i";
2618                 else if (stdout_format_has_o_or_i)
2619                         args[ac++] = "--log-format=%o";
2620                 else if (!verbose)
2621                         args[ac++] = "--log-format=X";
2622         }
2623
2624         if (block_size) {
2625                 if (asprintf(&arg, "-B%lu", block_size) < 0)
2626                         goto oom;
2627                 args[ac++] = arg;
2628         }
2629
2630         if (io_timeout) {
2631                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
2632                         goto oom;
2633                 args[ac++] = arg;
2634         }
2635
2636         if (bwlimit) {
2637                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
2638                         goto oom;
2639                 args[ac++] = arg;
2640         }
2641
2642         if (backup_dir) {
2643                 args[ac++] = "--backup-dir";
2644                 args[ac++] = backup_dir;
2645         }
2646
2647         /* Only send --suffix if it specifies a non-default value. */
2648         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
2649                 /* We use the following syntax to avoid weirdness with '~'. */
2650                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
2651                         goto oom;
2652                 args[ac++] = arg;
2653         }
2654
2655         if (checksum_choice) {
2656                 if (asprintf(&arg, "--checksum-choice=%s", checksum_choice) < 0)
2657                         goto oom;
2658                 args[ac++] = arg;
2659         }
2660
2661         if (am_sender) {
2662                 if (max_delete > 0) {
2663                         if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
2664                                 goto oom;
2665                         args[ac++] = arg;
2666                 } else if (max_delete == 0)
2667                         args[ac++] = "--max-delete=-1";
2668                 if (min_size >= 0) {
2669                         args[ac++] = "--min-size";
2670                         args[ac++] = min_size_arg;
2671                 }
2672                 if (max_size >= 0) {
2673                         args[ac++] = "--max-size";
2674                         args[ac++] = max_size_arg;
2675                 }
2676                 if (delete_before)
2677                         args[ac++] = "--delete-before";
2678                 else if (delete_during == 2)
2679                         args[ac++] = "--delete-delay";
2680                 else if (delete_during)
2681                         args[ac++] = "--delete-during";
2682                 else if (delete_after)
2683                         args[ac++] = "--delete-after";
2684                 else if (delete_mode && !delete_excluded)
2685                         args[ac++] = "--delete";
2686                 if (delete_excluded)
2687                         args[ac++] = "--delete-excluded";
2688                 if (force_delete)
2689                         args[ac++] = "--force";
2690                 if (write_batch < 0)
2691                         args[ac++] = "--only-write-batch=X";
2692                 if (am_root > 1)
2693                         args[ac++] = "--super";
2694                 if (size_only)
2695                         args[ac++] = "--size-only";
2696                 if (do_stats)
2697                         args[ac++] = "--stats";
2698         } else {
2699                 if (skip_compress) {
2700                         if (asprintf(&arg, "--skip-compress=%s", skip_compress) < 0)
2701                                 goto oom;
2702                         args[ac++] = arg;
2703                 }
2704         }
2705
2706         /* --delete-missing-args needs the cooperation of both sides, but
2707          * the sender can handle --ignore-missing-args by itself. */
2708         if (missing_args == 2)
2709                 args[ac++] = "--delete-missing-args";
2710         else if (missing_args == 1 && !am_sender)
2711                 args[ac++] = "--ignore-missing-args";
2712
2713         if (modify_window_set && am_sender) {
2714                 char *fmt = modify_window < 0 ? "-@%d" : "--modify-window=%d";
2715                 if (asprintf(&arg, fmt, modify_window) < 0)
2716                         goto oom;
2717                 args[ac++] = arg;
2718         }
2719
2720         if (checksum_seed) {
2721                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
2722                         goto oom;
2723                 args[ac++] = arg;
2724         }
2725
2726         if (partial_dir && am_sender) {
2727                 if (partial_dir != tmp_partialdir) {
2728                         args[ac++] = "--partial-dir";
2729                         args[ac++] = partial_dir;
2730                 }
2731                 if (delay_updates)
2732                         args[ac++] = "--delay-updates";
2733         } else if (keep_partial && am_sender)
2734                 args[ac++] = "--partial";
2735
2736         if (ignore_errors)
2737                 args[ac++] = "--ignore-errors";
2738
2739         if (copy_unsafe_links)
2740                 args[ac++] = "--copy-unsafe-links";
2741
2742         if (safe_symlinks)
2743                 args[ac++] = "--safe-links";
2744
2745         if (numeric_ids)
2746                 args[ac++] = "--numeric-ids";
2747
2748         if (use_qsort)
2749                 args[ac++] = "--use-qsort";
2750
2751         if (am_sender) {
2752                 if (usermap) {
2753                         if (asprintf(&arg, "--usermap=%s", usermap) < 0)
2754                                 goto oom;
2755                         args[ac++] = arg;
2756                 }
2757
2758                 if (groupmap) {
2759                         if (asprintf(&arg, "--groupmap=%s", groupmap) < 0)
2760                                 goto oom;
2761                         args[ac++] = arg;
2762                 }
2763
2764                 if (ignore_existing)
2765                         args[ac++] = "--ignore-existing";
2766
2767                 /* Backward compatibility: send --existing, not --ignore-non-existing. */
2768                 if (ignore_non_existing)
2769                         args[ac++] = "--existing";
2770
2771                 if (tmpdir) {
2772                         args[ac++] = "--temp-dir";
2773                         args[ac++] = tmpdir;
2774                 }
2775
2776                 if (basis_dir[0]) {
2777                         /* the server only needs this option if it is not the sender,
2778                          *   and it may be an older version that doesn't know this
2779                          *   option, so don't send it if client is the sender.
2780                          */
2781                         for (i = 0; i < basis_dir_cnt; i++) {
2782                                 args[ac++] = dest_option;
2783                                 args[ac++] = basis_dir[i];
2784                         }
2785                 }
2786         }
2787
2788         /* What flags do we need to send to the other side? */
2789         where = (am_server ? W_CLI : W_SRV) | (am_sender ? W_REC : W_SND);
2790         arg = make_output_option(info_words, info_levels, where);
2791         if (arg)
2792                 args[ac++] = arg;
2793
2794         arg = make_output_option(debug_words, debug_levels, where);
2795         if (arg)
2796                 args[ac++] = arg;
2797
2798         if (append_mode) {
2799                 if (append_mode > 1)
2800                         args[ac++] = "--append";
2801                 args[ac++] = "--append";
2802         } else if (inplace)
2803                 args[ac++] = "--inplace";
2804
2805         if (files_from && (!am_sender || filesfrom_host)) {
2806                 if (filesfrom_host) {
2807                         args[ac++] = "--files-from";
2808                         args[ac++] = files_from;
2809                         if (eol_nulls)
2810                                 args[ac++] = "--from0";
2811                 } else {
2812                         args[ac++] = "--files-from=-";
2813                         args[ac++] = "--from0";
2814                 }
2815                 if (!relative_paths)
2816                         args[ac++] = "--no-relative";
2817         }
2818         /* It's OK that this checks the upper-bound of the protocol_version. */
2819         if (relative_paths && !implied_dirs && (!am_sender || protocol_version >= 30))
2820                 args[ac++] = "--no-implied-dirs";
2821
2822         if (write_devices && am_sender)
2823                 args[ac++] = "--write-devices";
2824
2825         if (remove_source_files == 1)
2826                 args[ac++] = "--remove-source-files";
2827         else if (remove_source_files)
2828                 args[ac++] = "--remove-sent-files";
2829
2830         if (preallocate_files && am_sender)
2831                 args[ac++] = "--preallocate";
2832
2833         if (ac > MAX_SERVER_ARGS) { /* Not possible... */
2834                 rprintf(FERROR, "argc overflow in server_options().\n");
2835                 exit_cleanup(RERR_MALLOC);
2836         }
2837
2838         if (do_compression > 1)
2839                 args[ac++] = "--new-compress";
2840
2841         if (remote_option_cnt) {
2842                 int j;
2843                 if (ac + remote_option_cnt > MAX_SERVER_ARGS) {
2844                         rprintf(FERROR, "too many remote options specified.\n");
2845                         exit_cleanup(RERR_SYNTAX);
2846                 }
2847                 for (j = 1; j <= remote_option_cnt; j++)
2848                         args[ac++] = (char*)remote_options[j];
2849         }
2850
2851         *argc_p = ac;
2852         return;
2853
2854     oom:
2855         out_of_memory("server_options");
2856 }
2857
2858 /* If str points to a valid hostspec, return allocated memory containing the
2859  * [USER@]HOST part of the string, and set the path_start_ptr to the part of
2860  * the string after the host part.  Otherwise, return NULL.  If port_ptr is
2861  * non-NULL, we must be parsing an rsync:// URL hostname, and we will set
2862  * *port_ptr if a port number is found.  Note that IPv6 IPs will have their
2863  * (required for parsing) [ and ] chars elided from the returned string. */
2864 static char *parse_hostspec(char *str, char **path_start_ptr, int *port_ptr)
2865 {
2866         char *s, *host_start = str;
2867         int hostlen = 0, userlen = 0;
2868         char *ret;
2869
2870         for (s = str; ; s++) {
2871                 if (!*s) {
2872                         /* It is only OK if we run out of string with rsync:// */
2873                         if (!port_ptr)
2874                                 return NULL;
2875                         if (!hostlen)
2876                                 hostlen = s - host_start;
2877                         break;
2878                 }
2879                 if (*s == ':' || *s == '/') {
2880                         if (!hostlen)
2881                                 hostlen = s - host_start;
2882                         if (*s++ == '/') {
2883                                 if (!port_ptr)
2884                                         return NULL;
2885                         } else if (port_ptr) {
2886                                 *port_ptr = atoi(s);
2887                                 while (isDigit(s)) s++;
2888                                 if (*s && *s++ != '/')
2889                                         return NULL;
2890                         }
2891                         break;
2892                 }
2893                 if (*s == '@') {
2894                         userlen = s - str + 1;
2895                         host_start = s + 1;
2896                 } else if (*s == '[') {
2897                         if (s != host_start++)
2898                                 return NULL;
2899                         while (*s && *s != ']' && *s != '/') s++; /*SHARED ITERATOR*/
2900                         hostlen = s - host_start;
2901                         if (*s != ']' || (s[1] && s[1] != '/' && s[1] != ':') || !hostlen)
2902                                 return NULL;
2903                 }
2904         }
2905
2906         *path_start_ptr = s;
2907         ret = new_array(char, userlen + hostlen + 1);
2908         if (userlen)
2909                 strlcpy(ret, str, userlen + 1);
2910         strlcpy(ret + userlen, host_start, hostlen + 1);
2911         return ret;
2912 }
2913
2914 /* Look for a HOST specfication of the form "HOST:PATH", "HOST::PATH", or
2915  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
2916  * memory with the HOST.  If a daemon-accessing spec was specified, the value
2917  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
2918  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
2919  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
2920  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
2921 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
2922 {
2923         char *path;
2924
2925         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
2926                 *host_ptr = parse_hostspec(s + strlen(URL_PREFIX), &path, port_ptr);
2927                 if (*host_ptr) {
2928                         if (!*port_ptr)
2929                                 *port_ptr = -1; /* -1 indicates they want the default */
2930                         return path;
2931                 }
2932         }
2933
2934         *host_ptr = parse_hostspec(s, &path, NULL);
2935         if (!*host_ptr)
2936                 return NULL;
2937
2938         if (*path == ':') {
2939                 if (port_ptr && !*port_ptr)
2940                         *port_ptr = -1;
2941                 return path + 1;
2942         }
2943         if (port_ptr)
2944                 *port_ptr = 0;
2945
2946         return path;
2947 }