options.c

   1 /*
   2  * Command-line (and received via daemon-socket) option parsing.
   3  *
   4  * Copyright (C) 1998-2001 Andrew Tridgell <tridge@samba.org>
   5  * Copyright (C) 2000, 2001, 2002 Martin Pool <mbp@samba.org>
   6  * Copyright (C) 2002-2020 Wayne Davison
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, visit the http://fsf.org website.
  20  */
  21
  22 #include "rsync.h"
  23 #include "itypes.h"
  24 #include "latest-year.h"
  25 #include <popt.h>
  26 #include <zlib.h>
  27
  28 extern int module_id;
  29 extern int local_server;
  30 extern int sanitize_paths;
  31 extern int daemon_over_rsh;
  32 extern unsigned int module_dirlen;
  33 extern filter_rule_list filter_list;
  34 extern filter_rule_list daemon_filter_list;
  35
  36 #define NOT_SPECIFIED (-42)
  37
  38 int make_backups = 0;
  39
  40 /**
  41  * If 1, send the whole file as literal data rather than trying to
  42  * create an incremental diff.
  43  *
  44  * If -1, then look at whether we're local or remote and go by that.
  45  *
  46  * @sa disable_deltas_p()
  47  **/
  48 int whole_file = -1;
  49
  50 int append_mode = 0;
  51 int keep_dirlinks = 0;
  52 int copy_dirlinks = 0;
  53 int copy_links = 0;
  54 int write_devices = 0;
  55 int preserve_links = 0;
  56 int preserve_hard_links = 0;
  57 int preserve_acls = 0;
  58 int preserve_xattrs = 0;
  59 int preserve_perms = 0;
  60 int preserve_executability = 0;
  61 int preserve_devices = 0;
  62 int preserve_specials = 0;
  63 int preserve_uid = 0;
  64 int preserve_gid = 0;
  65 int preserve_times = 0;
  66 int preserve_atimes = 0;
  67 int update_only = 0;
  68 int open_noatime = 0;
  69 int cvs_exclude = 0;
  70 int dry_run = 0;
  71 int do_xfers = 1;
  72 int ignore_times = 0;
  73 int delete_mode = 0;
  74 int delete_during = 0;
  75 int delete_before = 0;
  76 int delete_after = 0;
  77 int delete_excluded = 0;
  78 int remove_source_files = 0;
  79 int one_file_system = 0;
  80 int protocol_version = PROTOCOL_VERSION;
  81 int sparse_files = 0;
  82 int preallocate_files = 0;
  83 int do_compression = 0;
  84 int def_compress_level = NOT_SPECIFIED;
  85 int am_root = 0; /* 0 = normal, 1 = root, 2 = --super, -1 = --fake-super */
  86 int am_server = 0;
  87 int am_sender = 0;
  88 int am_starting_up = 1;
  89 int relative_paths = -1;
  90 int implied_dirs = 1;
  91 int missing_args = 0; /* 0 = FERROR_XFER, 1 = ignore, 2 = delete */
  92 int numeric_ids = 0;
  93 int msgs2stderr = 0;
  94 int allow_8bit_chars = 0;
  95 int force_delete = 0;
  96 int io_timeout = 0;
  97 int prune_empty_dirs = 0;
  98 int use_qsort = 0;
  99 char *files_from = NULL;
 100 int filesfrom_fd = -1;
 101 char *filesfrom_host = NULL;
 102 int eol_nulls = 0;
 103 int protect_args = -1;
 104 int human_readable = 1;
 105 int recurse = 0;
 106 int allow_inc_recurse = 1;
 107 int xfer_dirs = -1;
 108 int am_daemon = 0;
 109 int connect_timeout = 0;
 110 int keep_partial = 0;
 111 int safe_symlinks = 0;
 112 int copy_unsafe_links = 0;
 113 int munge_symlinks = 0;
 114 int size_only = 0;
 115 int daemon_bwlimit = 0;
 116 int bwlimit = 0;
 117 int fuzzy_basis = 0;
 118 size_t bwlimit_writemax = 0;
 119 int ignore_existing = 0;
 120 int ignore_non_existing = 0;
 121 int need_messages_from_generator = 0;
 122 int max_delete = INT_MIN;
 123 OFF_T max_size = -1;
 124 OFF_T min_size = -1;
 125 int ignore_errors = 0;
 126 int modify_window = 0;
 127 int blocking_io = -1;
 128 int checksum_seed = 0;
 129 int inplace = 0;
 130 int delay_updates = 0;
 131 long block_size = 0; /* "long" because popt can't set an int32. */
 132 char *skip_compress = NULL;
 133 char *copy_as = NULL;
 134 item_list dparam_list = EMPTY_ITEM_LIST;
 135
 136 /** Network address family. **/
 137 int default_af_hint
 138 #ifdef INET6
 139         = 0;            /* Any protocol */
 140 #else
 141         = AF_INET;      /* Must use IPv4 */
 142 # ifdef AF_INET6
 143 #  undef AF_INET6
 144 # endif
 145 # define AF_INET6 AF_INET /* make -6 option a no-op */
 146 #endif
 147
 148 /** Do not go into the background when run as --daemon.  Good
 149  * for debugging and required for running as a service on W32,
 150  * or under Unix process-monitors. **/
 151 int no_detach
 152 #if defined _WIN32 || defined __WIN32__
 153         = 1;
 154 #else
 155         = 0;
 156 #endif
 157
 158 int write_batch = 0;
 159 int read_batch = 0;
 160 int backup_dir_len = 0;
 161 int backup_suffix_len;
 162 unsigned int backup_dir_remainder;
 163
 164 char *backup_suffix = NULL;
 165 char *tmpdir = NULL;
 166 char *partial_dir = NULL;
 167 char *basis_dir[MAX_BASIS_DIRS+1];
 168 char *config_file = NULL;
 169 char *shell_cmd = NULL;
 170 char *logfile_name = NULL;
 171 char *logfile_format = NULL;
 172 char *stdout_format = NULL;
 173 char *password_file = NULL;
 174 char *rsync_path = RSYNC_PATH;
 175 char *backup_dir = NULL;
 176 char backup_dir_buf[MAXPATHLEN];
 177 char *sockopts = NULL;
 178 char *usermap = NULL;
 179 char *groupmap = NULL;
 180 int rsync_port = 0;
 181 int compare_dest = 0;
 182 int copy_dest = 0;
 183 int link_dest = 0;
 184 int basis_dir_cnt = 0;
 185 char *dest_option = NULL;
 186
 187 static int remote_option_alloc = 0;
 188 int remote_option_cnt = 0;
 189 const char **remote_options = NULL;
 190 const char *checksum_choice = NULL;
 191
 192 int quiet = 0;
 193 int output_motd = 1;
 194 int log_before_transfer = 0;
 195 int stdout_format_has_i = 0;
 196 int stdout_format_has_o_or_i = 0;
 197 int logfile_format_has_i = 0;
 198 int logfile_format_has_o_or_i = 0;
 199 int always_checksum = 0;
 200 int list_only = 0;
 201
 202 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
 203 char *batch_name = NULL;
 204
 205 int need_unsorted_flist = 0;
 206 #ifdef ICONV_OPTION
 207 char *iconv_opt = ICONV_OPTION;
 208 #endif
 209
 210 struct chmod_mode_struct *chmod_modes = NULL;
 211
 212 static const char *debug_verbosity[] = {
 213         /*0*/ NULL,
 214         /*1*/ NULL,
 215         /*2*/ "BIND,CMD,CONNECT,DEL,DELTASUM,DUP,FILTER,FLIST,ICONV",
 216         /*3*/ "ACL,BACKUP,CONNECT2,DELTASUM2,DEL2,EXIT,FILTER2,FLIST2,FUZZY,GENR,OWN,RECV,SEND,TIME",
 217         /*4*/ "CMD2,DELTASUM3,DEL3,EXIT2,FLIST3,ICONV2,OWN2,PROTO,TIME2",
 218         /*5*/ "CHDIR,DELTASUM4,FLIST4,FUZZY2,HASH,HLINK",
 219 };
 220
 221 #define MAX_VERBOSITY ((int)(sizeof debug_verbosity / sizeof debug_verbosity[0]) - 1)
 222
 223 static const char *info_verbosity[1+MAX_VERBOSITY] = {
 224         /*0*/ NULL,
 225         /*1*/ "COPY,DEL,FLIST,MISC,NAME,STATS,SYMSAFE",
 226         /*2*/ "BACKUP,MISC2,MOUNT,NAME2,REMOVE,SKIP",
 227 };
 228
 229 #define MAX_OUT_LEVEL 4 /* The largest N allowed for any flagN word. */
 230
 231 short info_levels[COUNT_INFO], debug_levels[COUNT_DEBUG];
 232
 233 #define DEFAULT_PRIORITY 0      /* Default/implied/--verbose set values. */
 234 #define HELP_PRIORITY 1         /* The help output uses this level. */
 235 #define USER_PRIORITY 2         /* User-specified via --info or --debug */
 236 #define LIMIT_PRIORITY 3        /* Overriding priority when limiting values. */
 237
 238 #define W_CLI (1<<0)    /* client side */
 239 #define W_SRV (1<<1)    /* server side */
 240 #define W_SND (1<<2)    /* sending side */
 241 #define W_REC (1<<3)    /* receiving side */
 242
 243 struct output_struct {
 244         char *name;     /* The name of the info/debug flag. */
 245         char *help;     /* The description of the info/debug flag. */
 246         uchar namelen;  /* The length of the name string. */
 247         uchar flag;     /* The flag's value, for consistency check. */
 248         uchar where;    /* Bits indicating where the flag is used. */
 249         uchar priority; /* See *_PRIORITY defines. */
 250 };
 251
 252 #define INFO_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, INFO_##flag, where, 0 }
 253
 254 static struct output_struct info_words[COUNT_INFO+1] = {
 255         INFO_WORD(BACKUP, W_REC, "Mention files backed up"),
 256         INFO_WORD(COPY, W_REC, "Mention files copied locally on the receiving side"),
 257         INFO_WORD(DEL, W_REC, "Mention deletions on the receiving side"),
 258         INFO_WORD(FLIST, W_CLI, "Mention file-list receiving/sending (levels 1-2)"),
 259         INFO_WORD(MISC, W_SND|W_REC, "Mention miscellaneous information (levels 1-2)"),
 260         INFO_WORD(MOUNT, W_SND|W_REC, "Mention mounts that were found or skipped"),
 261         INFO_WORD(NAME, W_SND|W_REC, "Mention 1) updated file/dir names, 2) unchanged names"),
 262         INFO_WORD(PROGRESS, W_CLI, "Mention 1) per-file progress or 2) total transfer progress"),
 263         INFO_WORD(REMOVE, W_SND, "Mention files removed on the sending side"),
 264         INFO_WORD(SKIP, W_REC, "Mention files that are skipped due to options used"),
 265         INFO_WORD(STATS, W_CLI|W_SRV, "Mention statistics at end of run (levels 1-3)"),
 266         INFO_WORD(SYMSAFE, W_SND|W_REC, "Mention symlinks that are unsafe"),
 267         { NULL, "--info", 0, 0, 0, 0 }
 268 };
 269
 270 #define DEBUG_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, DEBUG_##flag, where, 0 }
 271
 272 static struct output_struct debug_words[COUNT_DEBUG+1] = {
 273         DEBUG_WORD(ACL, W_SND|W_REC, "Debug extra ACL info"),
 274         DEBUG_WORD(BACKUP, W_REC, "Debug backup actions (levels 1-2)"),
 275         DEBUG_WORD(BIND, W_CLI, "Debug socket bind actions"),
 276         DEBUG_WORD(CHDIR, W_CLI|W_SRV, "Debug when the current directory changes"),
 277         DEBUG_WORD(CONNECT, W_CLI, "Debug connection events (levels 1-2)"),
 278         DEBUG_WORD(CMD, W_CLI, "Debug commands+options that are issued (levels 1-2)"),
 279         DEBUG_WORD(DEL, W_REC, "Debug delete actions (levels 1-3)"),
 280         DEBUG_WORD(DELTASUM, W_SND|W_REC, "Debug delta-transfer checksumming (levels 1-4)"),
 281         DEBUG_WORD(DUP, W_REC, "Debug weeding of duplicate names"),
 282         DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-3)"),
 283         DEBUG_WORD(FILTER, W_SND|W_REC, "Debug filter actions (levels 1-2)"),
 284         DEBUG_WORD(FLIST, W_SND|W_REC, "Debug file-list operations (levels 1-4)"),
 285         DEBUG_WORD(FUZZY, W_REC, "Debug fuzzy scoring (levels 1-2)"),
 286         DEBUG_WORD(GENR, W_REC, "Debug generator functions"),
 287         DEBUG_WORD(HASH, W_SND|W_REC, "Debug hashtable code"),
 288         DEBUG_WORD(HLINK, W_SND|W_REC, "Debug hard-link actions (levels 1-3)"),
 289         DEBUG_WORD(ICONV, W_CLI|W_SRV, "Debug iconv character conversions (levels 1-2)"),
 290         DEBUG_WORD(IO, W_CLI|W_SRV, "Debug I/O routines (levels 1-4)"),
 291         DEBUG_WORD(OWN, W_REC, "Debug ownership changes in users & groups (levels 1-2)"),
 292         DEBUG_WORD(PROTO, W_CLI|W_SRV, "Debug protocol information"),
 293         DEBUG_WORD(RECV, W_REC, "Debug receiver functions"),
 294         DEBUG_WORD(SEND, W_SND, "Debug sender functions"),
 295         DEBUG_WORD(TIME, W_REC, "Debug setting of modified times (levels 1-2)"),
 296         { NULL, "--debug", 0, 0, 0, 0 }
 297 };
 298
 299 static int verbose = 0;
 300 static int do_stats = 0;
 301 static int do_progress = 0;
 302 static int daemon_opt;   /* sets am_daemon after option error-reporting */
 303 static int omit_dir_times = 0;
 304 static int omit_link_times = 0;
 305 static int F_option_cnt = 0;
 306 static int modify_window_set;
 307 static int itemize_changes = 0;
 308 static int refused_delete, refused_archive_part, refused_compress;
 309 static int refused_partial, refused_progress, refused_delete_before;
 310 static int refused_delete_during;
 311 static int refused_inplace, refused_no_iconv;
 312 static BOOL usermap_via_chown, groupmap_via_chown;
 313 #ifdef HAVE_SETVBUF
 314 static char *outbuf_mode;
 315 #endif
 316 static char *bwlimit_arg, *max_size_arg, *min_size_arg;
 317 static char tmp_partialdir[] = ".~tmp~";
 318
 319 /** Local address to bind.  As a character string because it's
 320  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
 321  * address, or a hostname. **/
 322 char *bind_address;
 323
 324 static void output_item_help(struct output_struct *words);
 325
 326 /* This constructs a string that represents all the options set for either
 327  * the --info or --debug setting, skipping any implied options (by -v, etc.).
 328  * This is used both when conveying the user's options to the server, and
 329  * when the help output wants to tell the user what options are implied. */
 330 static char *make_output_option(struct output_struct *words, short *levels, uchar where)
 331 {
 332         char *str = words == info_words ? "--info=" : "--debug=";
 333         int j, counts[MAX_OUT_LEVEL+1], pos, skipped = 0, len = 0, max = 0, lev = 0;
 334         int word_count = words == info_words ? COUNT_INFO : COUNT_DEBUG;
 335         char *buf;
 336
 337         memset(counts, 0, sizeof counts);
 338
 339         for (j = 0; words[j].name; j++) {
 340                 if (words[j].flag != j) {
 341                         rprintf(FERROR, "rsync: internal error on %s%s: %d != %d\n",
 342                                 words == info_words ? "INFO_" : "DEBUG_",
 343                                 words[j].name, words[j].flag, j);
 344                         exit_cleanup(RERR_UNSUPPORTED);
 345                 }
 346                 if (!(words[j].where & where))
 347                         continue;
 348                 if (words[j].priority == DEFAULT_PRIORITY) {
 349                         /* Implied items don't need to be mentioned. */
 350                         skipped++;
 351                         continue;
 352                 }
 353                 len += len ? 1 : strlen(str);
 354                 len += strlen(words[j].name);
 355                 len += levels[j] == 1 ? 0 : 1;
 356
 357                 if (words[j].priority == HELP_PRIORITY)
 358                         continue; /* no abbreviating for help */
 359
 360                 assert(levels[j] <= MAX_OUT_LEVEL);
 361                 if (++counts[levels[j]] > max) {
 362                         /* Determine which level has the most items. */
 363                         lev = levels[j];
 364                         max = counts[lev];
 365                 }
 366         }
 367
 368         /* Sanity check the COUNT_* define against the length of the table. */
 369         if (j != word_count) {
 370                 rprintf(FERROR, "rsync: internal error: %s is wrong! (%d != %d)\n",
 371                         words == info_words ? "COUNT_INFO" : "COUNT_DEBUG",
 372                         j, word_count);
 373                 exit_cleanup(RERR_UNSUPPORTED);
 374         }
 375
 376         if (!len)
 377                 return NULL;
 378
 379         len++;
 380         if (!(buf = new_array(char, len)))
 381                 out_of_memory("make_output_option");
 382         pos = 0;
 383
 384         if (skipped || max < 5)
 385                 lev = -1;
 386         else {
 387                 if (lev == 0)
 388                         pos += snprintf(buf, len, "%sNONE", str);
 389                 else if (lev == 1)
 390                         pos += snprintf(buf, len, "%sALL", str);
 391                 else
 392                         pos += snprintf(buf, len, "%sALL%d", str, lev);
 393         }
 394
 395         for (j = 0; words[j].name && pos < len; j++) {
 396                 if (words[j].priority == DEFAULT_PRIORITY || levels[j] == lev || !(words[j].where & where))
 397                         continue;
 398                 if (pos)
 399                         buf[pos++] = ',';
 400                 else
 401                         pos += strlcpy(buf+pos, str, len-pos);
 402                 if (pos < len)
 403                         pos += strlcpy(buf+pos, words[j].name, len-pos);
 404                 /* Level 1 is implied by the name alone. */
 405                 if (levels[j] != 1 && pos < len)
 406                         buf[pos++] = '0' + levels[j];
 407         }
 408
 409         buf[pos] = '\0';
 410
 411         return buf;
 412 }
 413
 414 static void parse_output_words(struct output_struct *words, short *levels,
 415                                const char *str, uchar priority)
 416 {
 417         const char *s;
 418         int j, len, lev;
 419
 420         for ( ; str; str = s) {
 421                 if ((s = strchr(str, ',')) != NULL)
 422                         len = s++ - str;
 423                 else
 424                         len = strlen(str);
 425                 if (!len)
 426                         continue;
 427                 if (!isDigit(str)) {
 428                         while (len && isDigit(str+len-1))
 429                                 len--;
 430                 }
 431                 lev = isDigit(str+len) ? atoi(str+len) : 1;
 432                 if (lev > MAX_OUT_LEVEL)
 433                         lev = MAX_OUT_LEVEL;
 434                 if (len == 4 && strncasecmp(str, "help", 4) == 0) {
 435                         output_item_help(words);
 436                         exit_cleanup(0);
 437                 }
 438                 if (len == 4 && strncasecmp(str, "none", 4) == 0)
 439                         len = lev = 0;
 440                 else if (len == 3 && strncasecmp(str, "all", 3) == 0)
 441                         len = 0;
 442                 for (j = 0; words[j].name; j++) {
 443                         if (!len
 444                          || (len == words[j].namelen && strncasecmp(str, words[j].name, len) == 0)) {
 445                                 if (priority >= words[j].priority) {
 446                                         words[j].priority = priority;
 447                                         levels[j] = lev;
 448                                 }
 449                                 if (len)
 450                                         break;
 451                         }
 452                 }
 453                 if (len && !words[j].name) {
 454                         rprintf(FERROR, "Unknown %s item: \"%.*s\"\n",
 455                                 words[j].help, len, str);
 456                         exit_cleanup(RERR_SYNTAX);
 457                 }
 458         }
 459 }
 460
 461 /* Tell the user what all the info or debug flags mean. */
 462 static void output_item_help(struct output_struct *words)
 463 {
 464         short *levels = words == info_words ? info_levels : debug_levels;
 465         const char **verbosity = words == info_words ? info_verbosity : debug_verbosity;
 466         char buf[128], *opt, *fmt = "%-10s %s\n";
 467         int j;
 468
 469         reset_output_levels();
 470
 471         rprintf(FINFO, "Use OPT or OPT1 for level 1 output, OPT2 for level 2, etc.; OPT0 silences.\n");
 472         rprintf(FINFO, "\n");
 473         for (j = 0; words[j].name; j++)
 474                 rprintf(FINFO, fmt, words[j].name, words[j].help);
 475         rprintf(FINFO, "\n");
 476
 477         snprintf(buf, sizeof buf, "Set all %s options (e.g. all%d)",
 478                  words[j].help, MAX_OUT_LEVEL);
 479         rprintf(FINFO, fmt, "ALL", buf);
 480
 481         snprintf(buf, sizeof buf, "Silence all %s options (same as all0)",
 482                  words[j].help);
 483         rprintf(FINFO, fmt, "NONE", buf);
 484
 485         rprintf(FINFO, fmt, "HELP", "Output this help message");
 486         rprintf(FINFO, "\n");
 487         rprintf(FINFO, "Options added for each increase in verbose level:\n");
 488
 489         for (j = 1; j <= MAX_VERBOSITY; j++) {
 490                 parse_output_words(words, levels, verbosity[j], HELP_PRIORITY);
 491                 opt = make_output_option(words, levels, W_CLI|W_SRV|W_SND|W_REC);
 492                 if (opt) {
 493                         rprintf(FINFO, "%d) %s\n", j, strchr(opt, '=')+1);
 494                         free(opt);
 495                 }
 496                 reset_output_levels();
 497         }
 498 }
 499
 500 /* The --verbose option now sets info+debug flags. */
 501 static void set_output_verbosity(int level, uchar priority)
 502 {
 503         int j;
 504
 505         if (level > MAX_VERBOSITY)
 506                 level = MAX_VERBOSITY;
 507
 508         for (j = 1; j <= level; j++) {
 509                 parse_output_words(info_words, info_levels, info_verbosity[j], priority);
 510                 parse_output_words(debug_words, debug_levels, debug_verbosity[j], priority);
 511         }
 512 }
 513
 514 /* Limit the info+debug flag levels given a verbose-option level limit. */
 515 void limit_output_verbosity(int level)
 516 {
 517         short info_limits[COUNT_INFO], debug_limits[COUNT_DEBUG];
 518         int j;
 519
 520         if (level > MAX_VERBOSITY)
 521                 return;
 522
 523         memset(info_limits, 0, sizeof info_limits);
 524         memset(debug_limits, 0, sizeof debug_limits);
 525
 526         /* Compute the level limits in the above arrays. */
 527         for (j = 1; j <= level; j++) {
 528                 parse_output_words(info_words, info_limits, info_verbosity[j], LIMIT_PRIORITY);
 529                 parse_output_words(debug_words, debug_limits, debug_verbosity[j], LIMIT_PRIORITY);
 530         }
 531
 532         for (j = 0; j < COUNT_INFO; j++) {
 533                 if (info_levels[j] > info_limits[j])
 534                         info_levels[j] = info_limits[j];
 535         }
 536
 537         for (j = 0; j < COUNT_DEBUG; j++) {
 538                 if (debug_levels[j] > debug_limits[j])
 539                         debug_levels[j] = debug_limits[j];
 540         }
 541 }
 542
 543 void reset_output_levels(void)
 544 {
 545         int j;
 546
 547         memset(info_levels, 0, sizeof info_levels);
 548         memset(debug_levels, 0, sizeof debug_levels);
 549
 550         for (j = 0; j < COUNT_INFO; j++)
 551                 info_words[j].priority = DEFAULT_PRIORITY;
 552
 553         for (j = 0; j < COUNT_DEBUG; j++)
 554                 debug_words[j].priority = DEFAULT_PRIORITY;
 555 }
 556
 557 void negate_output_levels(void)
 558 {
 559         int j;
 560
 561         for (j = 0; j < COUNT_INFO; j++)
 562                 info_levels[j] *= -1;
 563
 564         for (j = 0; j < COUNT_DEBUG; j++)
 565                 debug_levels[j] *= -1;
 566 }
 567
 568 static void print_rsync_version(enum logcode f)
 569 {
 570         char *subprotocol = "";
 571         char const *got_socketpair = "no ";
 572         char const *have_inplace = "no ";
 573         char const *hardlinks = "no ";
 574         char const *prealloc = "no ";
 575         char const *symtimes = "no ";
 576         char const *acls = "no ";
 577         char const *xattrs = "no ";
 578         char const *links = "no ";
 579         char const *iconv = "no ";
 580         char const *ipv6 = "no ";
 581         STRUCT_STAT *dumstat;
 582
 583 #if SUBPROTOCOL_VERSION != 0
 584         if (asprintf(&subprotocol, ".PR%d", SUBPROTOCOL_VERSION) < 0)
 585                 out_of_memory("print_rsync_version");
 586 #endif
 587 #ifdef HAVE_SOCKETPAIR
 588         got_socketpair = "";
 589 #endif
 590 #ifdef HAVE_FTRUNCATE
 591         have_inplace = "";
 592 #endif
 593 #ifdef SUPPORT_HARD_LINKS
 594         hardlinks = "";
 595 #endif
 596 #ifdef SUPPORT_PREALLOCATION
 597         prealloc = "";
 598 #endif
 599 #ifdef SUPPORT_ACLS
 600         acls = "";
 601 #endif
 602 #ifdef SUPPORT_XATTRS
 603         xattrs = "";
 604 #endif
 605 #ifdef SUPPORT_LINKS
 606         links = "";
 607 #endif
 608 #ifdef INET6
 609         ipv6 = "";
 610 #endif
 611 #ifdef ICONV_OPTION
 612         iconv = "";
 613 #endif
 614 #ifdef CAN_SET_SYMLINK_TIMES
 615         symtimes = "";
 616 #endif
 617
 618         rprintf(f, "%s  version %s  protocol version %d%s\n",
 619                 RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION, subprotocol);
 620         rprintf(f, "Copyright (C) 1996-" LATEST_YEAR " by Andrew Tridgell, Wayne Davison, and others.\n");
 621         rprintf(f, "Web site: http://rsync.samba.org/\n");
 622         rprintf(f, "Capabilities:\n");
 623         rprintf(f, "    %d-bit files, %d-bit inums, %d-bit timestamps, %d-bit long ints,\n",
 624                 (int)(sizeof (OFF_T) * 8),
 625                 (int)(sizeof dumstat->st_ino * 8), /* Don't check ino_t! */
 626                 (int)(sizeof (time_t) * 8),
 627                 (int)(sizeof (int64) * 8));
 628         rprintf(f, "    %ssocketpairs, %shardlinks, %ssymlinks, %sIPv6, batchfiles, %sinplace,\n",
 629                 got_socketpair, hardlinks, links, ipv6, have_inplace);
 630         rprintf(f, "    %sappend, %sACLs, %sxattrs, %siconv, %ssymtimes, %sprealloc\n",
 631                 have_inplace, acls, xattrs, iconv, symtimes, prealloc);
 632
 633 #ifdef MAINTAINER_MODE
 634         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
 635 #endif
 636
 637 #if SIZEOF_INT64 < 8
 638         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
 639 #endif
 640         if (sizeof (int64) != SIZEOF_INT64) {
 641                 rprintf(f,
 642                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
 643                         (int) SIZEOF_INT64, (int) sizeof (int64));
 644         }
 645
 646         rprintf(f,"\n");
 647         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
 648         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
 649         rprintf(f,"General Public Licence for details.\n");
 650 }
 651
 652
 653 void usage(enum logcode F)
 654 {
 655   print_rsync_version(F);
 656
 657   rprintf(F,"\n");
 658   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
 659   rprintf(F,"via a fast differencing algorithm.\n");
 660
 661   rprintf(F,"\n");
 662   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
 663   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
 664   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
 665   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
 666   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
 667   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
 668   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
 669   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
 670   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
 671   rprintf(F,"\n");
 672   rprintf(F,"Options\n");
 673   rprintf(F," -v, --verbose               increase verbosity\n");
 674   rprintf(F,"     --info=FLAGS            fine-grained informational verbosity\n");
 675   rprintf(F,"     --debug=FLAGS           fine-grained debug verbosity\n");
 676   rprintf(F,"     --msgs2stderr           special output handling for debugging\n");
 677   rprintf(F," -q, --quiet                 suppress non-error messages\n");
 678   rprintf(F,"     --no-motd               suppress daemon-mode MOTD (see manpage caveat)\n");
 679   rprintf(F," -c, --checksum              skip based on checksum, not mod-time & size\n");
 680   rprintf(F," -a, --archive               archive mode; equals -rlptgoD (no -H,-A,-X)\n");
 681   rprintf(F,"     --no-OPTION             turn off an implied OPTION (e.g. --no-D)\n");
 682   rprintf(F," -r, --recursive             recurse into directories\n");
 683   rprintf(F," -R, --relative              use relative path names\n");
 684   rprintf(F,"     --no-implied-dirs       don't send implied dirs with --relative\n");
 685   rprintf(F," -b, --backup                make backups (see --suffix & --backup-dir)\n");
 686   rprintf(F,"     --backup-dir=DIR        make backups into hierarchy based in DIR\n");
 687   rprintf(F,"     --suffix=SUFFIX         set backup suffix (default %s w/o --backup-dir)\n",BACKUP_SUFFIX);
 688   rprintf(F," -u, --update                skip files that are newer on the receiver\n");
 689   rprintf(F,"     --inplace               update destination files in-place (SEE MAN PAGE)\n");
 690   rprintf(F,"     --append                append data onto shorter files\n");
 691   rprintf(F,"     --append-verify         like --append, but with old data in file checksum\n");
 692   rprintf(F," -d, --dirs                  transfer directories without recursing\n");
 693   rprintf(F," -l, --links                 copy symlinks as symlinks\n");
 694   rprintf(F," -L, --copy-links            transform symlink into referent file/dir\n");
 695   rprintf(F,"     --copy-unsafe-links     only \"unsafe\" symlinks are transformed\n");
 696   rprintf(F,"     --safe-links            ignore symlinks that point outside the source tree\n");
 697   rprintf(F,"     --munge-links           munge symlinks to make them safer (but unusable)\n");
 698   rprintf(F," -k, --copy-dirlinks         transform symlink to a dir into referent dir\n");
 699   rprintf(F," -K, --keep-dirlinks         treat symlinked dir on receiver as dir\n");
 700   rprintf(F," -H, --hard-links            preserve hard links\n");
 701   rprintf(F," -p, --perms                 preserve permissions\n");
 702   rprintf(F," -E, --executability         preserve the file's executability\n");
 703   rprintf(F,"     --chmod=CHMOD           affect file and/or directory permissions\n");
 704 #ifdef SUPPORT_ACLS
 705   rprintf(F," -A, --acls                  preserve ACLs (implies --perms)\n");
 706 #endif
 707 #ifdef SUPPORT_XATTRS
 708   rprintf(F," -X, --xattrs                preserve extended attributes\n");
 709 #endif
 710   rprintf(F," -o, --owner                 preserve owner (super-user only)\n");
 711   rprintf(F," -g, --group                 preserve group\n");
 712   rprintf(F,"     --devices               preserve device files (super-user only)\n");
 713   rprintf(F,"     --specials              preserve special files\n");
 714   rprintf(F," -D                          same as --devices --specials\n");
 715   rprintf(F," -t, --times                 preserve modification times\n");
 716   rprintf(F," -U, --atimes                preserve access (last-used) times\n");
 717   rprintf(F,"     --open-noatime          avoid changing the atime on opened files\n");
 718   rprintf(F," -O, --omit-dir-times        omit directories from --times\n");
 719   rprintf(F," -J, --omit-link-times       omit symlinks from --times\n");
 720   rprintf(F,"     --super                 receiver attempts super-user activities\n");
 721 #ifdef SUPPORT_XATTRS
 722   rprintf(F,"     --fake-super            store/recover privileged attrs using xattrs\n");
 723 #endif
 724   rprintf(F," -S, --sparse                turn sequences of nulls into sparse blocks\n");
 725 #ifdef SUPPORT_PREALLOCATION
 726   rprintf(F,"     --preallocate           allocate dest files before writing them\n");
 727 #else
 728   rprintf(F,"     --preallocate           pre-allocate dest files on remote receiver\n");
 729 #endif
 730   rprintf(F,"     --write-devices         write to devices as files (implies --inplace)\n");
 731   rprintf(F," -n, --dry-run               perform a trial run with no changes made\n");
 732   rprintf(F," -W, --whole-file            copy files whole (without delta-xfer algorithm)\n");
 733   rprintf(F,"     --checksum-choice=STR   choose the checksum algorithms\n");
 734   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
 735   rprintf(F," -B, --block-size=SIZE       force a fixed checksum block-size\n");
 736   rprintf(F," -e, --rsh=COMMAND           specify the remote shell to use\n");
 737   rprintf(F,"     --rsync-path=PROGRAM    specify the rsync to run on the remote machine\n");
 738   rprintf(F,"     --existing              skip creating new files on receiver\n");
 739   rprintf(F,"     --ignore-existing       skip updating files that already exist on receiver\n");
 740   rprintf(F,"     --remove-source-files   sender removes synchronized files (non-dirs)\n");
 741   rprintf(F,"     --del                   an alias for --delete-during\n");
 742   rprintf(F,"     --delete                delete extraneous files from destination dirs\n");
 743   rprintf(F,"     --delete-before         receiver deletes before transfer, not during\n");
 744   rprintf(F,"     --delete-during         receiver deletes during the transfer\n");
 745   rprintf(F,"     --delete-delay          find deletions during, delete after\n");
 746   rprintf(F,"     --delete-after          receiver deletes after transfer, not during\n");
 747   rprintf(F,"     --delete-excluded       also delete excluded files from destination dirs\n");
 748   rprintf(F,"     --ignore-missing-args   ignore missing source args without error\n");
 749   rprintf(F,"     --delete-missing-args   delete missing source args from destination\n");
 750   rprintf(F,"     --ignore-errors         delete even if there are I/O errors\n");
 751   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
 752   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
 753   rprintf(F,"     --max-size=SIZE         don't transfer any file larger than SIZE\n");
 754   rprintf(F,"     --min-size=SIZE         don't transfer any file smaller than SIZE\n");
 755   rprintf(F,"     --partial               keep partially transferred files\n");
 756   rprintf(F,"     --partial-dir=DIR       put a partially transferred file into DIR\n");
 757   rprintf(F,"     --delay-updates         put all updated files into place at transfer's end\n");
 758   rprintf(F," -m, --prune-empty-dirs      prune empty directory chains from the file-list\n");
 759   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
 760   rprintf(F,"     --usermap=STRING        custom username mapping\n");
 761   rprintf(F,"     --groupmap=STRING       custom groupname mapping\n");
 762   rprintf(F,"     --chown=USER:GROUP      simple username/groupname mapping\n");
 763   rprintf(F,"     --timeout=SECONDS       set I/O timeout in seconds\n");
 764   rprintf(F,"     --contimeout=SECONDS    set daemon connection timeout in seconds\n");
 765   rprintf(F," -I, --ignore-times          don't skip files that match in size and mod-time\n");
 766   rprintf(F," -M, --remote-option=OPTION  send OPTION to the remote side only\n");
 767   rprintf(F,"     --size-only             skip files that match in size\n");
 768   rprintf(F," -@, --modify-window=NUM     set the accuracy for mod-time comparisons\n");
 769   rprintf(F," -T, --temp-dir=DIR          create temporary files in directory DIR\n");
 770   rprintf(F," -y, --fuzzy                 find similar file for basis if no dest file\n");
 771   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
 772   rprintf(F,"     --copy-dest=DIR         ... and include copies of unchanged files\n");
 773   rprintf(F,"     --link-dest=DIR         hardlink to files in DIR when unchanged\n");
 774   rprintf(F," -z, --compress              compress file data during the transfer\n");
 775   rprintf(F,"     --compress-level=NUM    explicitly set compression level\n");
 776   rprintf(F,"     --skip-compress=LIST    skip compressing files with a suffix in LIST\n");
 777   rprintf(F," -C, --cvs-exclude           auto-ignore files the same way CVS does\n");
 778   rprintf(F," -f, --filter=RULE           add a file-filtering RULE\n");
 779   rprintf(F," -F                          same as --filter='dir-merge /.rsync-filter'\n");
 780   rprintf(F,"                             repeated: --filter='- .rsync-filter'\n");
 781   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
 782   rprintf(F,"     --exclude-from=FILE     read exclude patterns from FILE\n");
 783   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
 784   rprintf(F,"     --include-from=FILE     read include patterns from FILE\n");
 785   rprintf(F,"     --files-from=FILE       read list of source-file names from FILE\n");
 786   rprintf(F," -0, --from0                 all *-from/filter files are delimited by 0s\n");
 787   rprintf(F," -s, --protect-args          no space-splitting; only wildcard special-chars\n");
 788   rprintf(F,"     --copy-as=USER[:GROUP]  specify user & optional group for the copy\n");
 789   rprintf(F,"     --address=ADDRESS       bind address for outgoing socket to daemon\n");
 790   rprintf(F,"     --port=PORT             specify double-colon alternate port number\n");
 791   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
 792   rprintf(F,"     --blocking-io           use blocking I/O for the remote shell\n");
 793   rprintf(F,"     --stats                 give some file-transfer stats\n");
 794   rprintf(F," -8, --8-bit-output          leave high-bit chars unescaped in output\n");
 795   rprintf(F," -h, --human-readable        output numbers in a human-readable format\n");
 796   rprintf(F,"     --progress              show progress during transfer\n");
 797   rprintf(F," -P                          same as --partial --progress\n");
 798   rprintf(F," -i, --itemize-changes       output a change-summary for all updates\n");
 799   rprintf(F,"     --out-format=FORMAT     output updates using the specified FORMAT\n");
 800   rprintf(F,"     --log-file=FILE         log what we're doing to the specified FILE\n");
 801   rprintf(F,"     --log-file-format=FMT   log updates using the specified FMT\n");
 802   rprintf(F,"     --password-file=FILE    read daemon-access password from FILE\n");
 803   rprintf(F,"     --list-only             list the files instead of copying them\n");
 804   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
 805 #ifdef HAVE_SETVBUF
 806   rprintf(F,"     --outbuf=N|L|B          set output buffering to None, Line, or Block\n");
 807 #endif
 808   rprintf(F,"     --write-batch=FILE      write a batched update to FILE\n");
 809   rprintf(F,"     --only-write-batch=FILE like --write-batch but w/o updating destination\n");
 810   rprintf(F,"     --read-batch=FILE       read a batched update from FILE\n");
 811   rprintf(F,"     --protocol=NUM          force an older protocol version to be used\n");
 812 #ifdef ICONV_OPTION
 813   rprintf(F,"     --iconv=CONVERT_SPEC    request charset conversion of filenames\n");
 814 #endif
 815   rprintf(F,"     --checksum-seed=NUM     set block/file checksum seed (advanced)\n");
 816   rprintf(F," -4, --ipv4                  prefer IPv4\n");
 817   rprintf(F," -6, --ipv6                  prefer IPv6\n");
 818   rprintf(F,"     --version               print version number\n");
 819   rprintf(F,"(-h) --help                  show this help (-h is --help only if used alone)\n");
 820
 821   rprintf(F,"\n");
 822   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
 823   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
 824   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
 825 }
 826
 827 enum {OPT_VERSION = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
 828       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
 829       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
 830       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
 831       OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, OPT_INFO, OPT_DEBUG,
 832       OPT_USERMAP, OPT_GROUPMAP, OPT_CHOWN, OPT_BWLIMIT,
 833       OPT_SERVER, OPT_REFUSED_BASE = 9000};
 834
 835 static struct poptOption long_options[] = {
 836   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 837   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
 838   {"version",          0,  POPT_ARG_NONE,   0, OPT_VERSION, 0, 0},
 839   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
 840   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 841   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 842   {"info",             0,  POPT_ARG_STRING, 0, OPT_INFO, 0, 0 },
 843   {"debug",            0,  POPT_ARG_STRING, 0, OPT_DEBUG, 0, 0 },
 844   {"msgs2stderr",      0,  POPT_ARG_NONE,   &msgs2stderr, 0, 0, 0 },
 845   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
 846   {"motd",             0,  POPT_ARG_VAL,    &output_motd, 1, 0, 0 },
 847   {"no-motd",          0,  POPT_ARG_VAL,    &output_motd, 0, 0, 0 },
 848   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
 849   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
 850   {"no-human-readable",0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 851   {"no-h",             0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 852   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
 853   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
 854   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
 855   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 856   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 857   {"inc-recursive",    0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 858   {"no-inc-recursive", 0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 859   {"i-r",              0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 860   {"no-i-r",           0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 861   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
 862   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 863   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 864   {"old-dirs",         0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 865   {"old-d",            0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 866   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
 867   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 868   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 869   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
 870   {"acls",            'A', POPT_ARG_NONE,   0, 'A', 0, 0 },
 871   {"no-acls",          0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 872   {"no-A",             0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 873   {"xattrs",          'X', POPT_ARG_NONE,   0, 'X', 0, 0 },
 874   {"no-xattrs",        0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 875   {"no-X",             0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 876   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
 877   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 878   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 879   {"atimes",          'U', POPT_ARG_NONE,   0, 'U', 0, 0 },
 880   {"no-atimes",        0,  POPT_ARG_VAL,    &preserve_atimes, 0, 0, 0 },
 881   {"no-U",             0,  POPT_ARG_VAL,    &preserve_atimes, 0, 0, 0 },
 882   {"open-noatime",     0,  POPT_ARG_VAL,    &open_noatime, 1, 0, 0 },
 883   {"no-open-noatime",  0,  POPT_ARG_VAL,    &open_noatime, 0, 0, 0 },
 884   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 1, 0, 0 },
 885   {"no-omit-dir-times",0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 886   {"no-O",             0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 887   {"omit-link-times", 'J', POPT_ARG_VAL,    &omit_link_times, 1, 0, 0 },
 888   {"no-omit-link-times",0, POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 889   {"no-J",             0,  POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 890   {"modify-window",   '@', POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
 891   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
 892   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
 893   {"fake-super",       0,  POPT_ARG_VAL,    &am_root, -1, 0, 0 },
 894   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
 895   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 896   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 897   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
 898   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 899   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 900   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
 901   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
 902   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
 903   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
 904   {"write-devices",    0,  POPT_ARG_VAL,    &write_devices, 1, 0, 0 },
 905   {"no-write-devices", 0,  POPT_ARG_VAL,    &write_devices, 0, 0, 0 },
 906   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
 907   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
 908   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
 909   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 910   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 911   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
 912   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
 913   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
 914   {"munge-links",      0,  POPT_ARG_VAL,    &munge_symlinks, 1, 0, 0 },
 915   {"no-munge-links",   0,  POPT_ARG_VAL,    &munge_symlinks, 0, 0, 0 },
 916   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
 917   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
 918   {"hard-links",      'H', POPT_ARG_NONE,   0, 'H', 0, 0 },
 919   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 920   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 921   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
 922   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 923   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 924   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 925   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 926   {"i-d",              0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 927   {"no-i-d",           0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 928   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
 929   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
 930   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
 931   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
 932   {"no-one-file-system",0, POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 933   {"no-x",             0,  POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 934   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
 935   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 936   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 937   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
 938   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
 939   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
 940   {"sparse",          'S', POPT_ARG_VAL,    &sparse_files, 1, 0, 0 },
 941   {"no-sparse",        0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 942   {"no-S",             0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 943   {"preallocate",      0,  POPT_ARG_NONE,   &preallocate_files, 0, 0, 0},
 944   {"inplace",          0,  POPT_ARG_VAL,    &inplace, 1, 0, 0 },
 945   {"no-inplace",       0,  POPT_ARG_VAL,    &inplace, 0, 0, 0 },
 946   {"append",           0,  POPT_ARG_NONE,   0, OPT_APPEND, 0, 0 },
 947   {"append-verify",    0,  POPT_ARG_VAL,    &append_mode, 2, 0, 0 },
 948   {"no-append",        0,  POPT_ARG_VAL,    &append_mode, 0, 0, 0 },
 949   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
 950   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
 951   {"delete-before",    0,  POPT_ARG_NONE,   &delete_before, 0, 0, 0 },
 952   {"delete-during",    0,  POPT_ARG_VAL,    &delete_during, 1, 0, 0 },
 953   {"delete-delay",     0,  POPT_ARG_VAL,    &delete_during, 2, 0, 0 },
 954   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
 955   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
 956   {"delete-missing-args",0,POPT_BIT_SET,    &missing_args, 2, 0, 0 },
 957   {"ignore-missing-args",0,POPT_BIT_SET,    &missing_args, 1, 0, 0 },
 958   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_source_files, 2, 0, 0 }, /* deprecated */
 959   {"remove-source-files",0,POPT_ARG_VAL,    &remove_source_files, 1, 0, 0 },
 960   {"force",            0,  POPT_ARG_VAL,    &force_delete, 1, 0, 0 },
 961   {"no-force",         0,  POPT_ARG_VAL,    &force_delete, 0, 0, 0 },
 962   {"ignore-errors",    0,  POPT_ARG_VAL,    &ignore_errors, 1, 0, 0 },
 963   {"no-ignore-errors", 0,  POPT_ARG_VAL,    &ignore_errors, 0, 0, 0 },
 964   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
 965   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
 966   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
 967   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
 968   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
 969   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
 970   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
 971   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
 972   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
 973   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 974   {"checksum-choice",  0,  POPT_ARG_STRING, &checksum_choice, 0, 0, 0 },
 975   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 976   {"checksum",        'c', POPT_ARG_VAL,    &always_checksum, 1, 0, 0 },
 977   {"no-checksum",      0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 978   {"no-c",             0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 979   {"block-size",      'B', POPT_ARG_LONG,   &block_size, 0, 0, 0 },
 980   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
 981   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
 982   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
 983   {"fuzzy",           'y', POPT_ARG_NONE,   0, 'y', 0, 0 },
 984   {"no-fuzzy",         0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 985   {"no-y",             0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 986   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
 987   {"old-compress",     0,  POPT_ARG_VAL,    &do_compression, 1, 0, 0 },
 988   {"new-compress",     0,  POPT_ARG_VAL,    &do_compression, 2, 0, 0 },
 989   {"no-compress",      0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
 990   {"no-z",             0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
 991   {"skip-compress",    0,  POPT_ARG_STRING, &skip_compress, 0, 0, 0 },
 992   {"compress-level",   0,  POPT_ARG_INT,    &def_compress_level, 0, 0, 0 },
 993   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
 994   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
 995   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
 996   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
 997   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
 998   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
 999   {"delay-updates",    0,  POPT_ARG_VAL,    &delay_updates, 1, 0, 0 },
1000   {"no-delay-updates", 0,  POPT_ARG_VAL,    &delay_updates, 0, 0, 0 },
1001   {"prune-empty-dirs",'m', POPT_ARG_VAL,    &prune_empty_dirs, 1, 0, 0 },
1002   {"no-prune-empty-dirs",0,POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
1003   {"no-m",             0,  POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
1004   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
1005   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
1006   {"out-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 },
1007   {"log-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 }, /* DEPRECATED */
1008   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
1009   {"no-itemize-changes",0, POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
1010   {"no-i",             0,  POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
1011   {"bwlimit",          0,  POPT_ARG_STRING, &bwlimit_arg, OPT_BWLIMIT, 0, 0 },
1012   {"no-bwlimit",       0,  POPT_ARG_VAL,    &bwlimit, 0, 0, 0 },
1013   {"backup",          'b', POPT_ARG_VAL,    &make_backups, 1, 0, 0 },
1014   {"no-backup",        0,  POPT_ARG_VAL,    &make_backups, 0, 0, 0 },
1015   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
1016   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
1017   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
1018   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
1019   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
1020   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
1021   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
1022   {"from0",           '0', POPT_ARG_VAL,    &eol_nulls, 1, 0, 0},
1023   {"no-from0",         0,  POPT_ARG_VAL,    &eol_nulls, 0, 0, 0},
1024   {"protect-args",    's', POPT_ARG_VAL,    &protect_args, 1, 0, 0},
1025   {"no-protect-args",  0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1026   {"no-s",             0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1027   {"numeric-ids",      0,  POPT_ARG_VAL,    &numeric_ids, 1, 0, 0 },
1028   {"no-numeric-ids",   0,  POPT_ARG_VAL,    &numeric_ids, 0, 0, 0 },
1029   {"usermap",          0,  POPT_ARG_STRING, 0, OPT_USERMAP, 0, 0 },
1030   {"groupmap",         0,  POPT_ARG_STRING, 0, OPT_GROUPMAP, 0, 0 },
1031   {"chown",            0,  POPT_ARG_STRING, 0, OPT_CHOWN, 0, 0 },
1032   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
1033   {"no-timeout",       0,  POPT_ARG_VAL,    &io_timeout, 0, 0, 0 },
1034   {"contimeout",       0,  POPT_ARG_INT,    &connect_timeout, 0, 0, 0 },
1035   {"no-contimeout",    0,  POPT_ARG_VAL,    &connect_timeout, 0, 0, 0 },
1036   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
1037   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
1038   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1039 #ifdef ICONV_OPTION
1040   {"iconv",            0,  POPT_ARG_STRING, &iconv_opt, 0, 0, 0 },
1041   {"no-iconv",         0,  POPT_ARG_NONE,   0, OPT_NO_ICONV, 0, 0 },
1042 #endif
1043   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1044   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1045   {"8-bit-output",    '8', POPT_ARG_VAL,    &allow_8bit_chars, 1, 0, 0 },
1046   {"no-8-bit-output",  0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1047   {"no-8",             0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1048   {"qsort",            0,  POPT_ARG_NONE,   &use_qsort, 0, 0, 0 },
1049   {"copy-as",          0,  POPT_ARG_STRING, &copy_as, 0, 0, 0 },
1050   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1051   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1052   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1053   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
1054   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
1055   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
1056 #ifdef HAVE_SETVBUF
1057   {"outbuf",           0,  POPT_ARG_STRING, &outbuf_mode, 0, 0, 0 },
1058 #endif
1059   {"remote-option",   'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1060   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1061   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
1062   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
1063   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
1064   /* All the following options switch us into daemon-mode option-parsing. */
1065   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1066   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1067   {"dparam",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1068   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1069   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1070   {0,0,0,0, 0, 0, 0}
1071 };
1072
1073 static void daemon_usage(enum logcode F)
1074 {
1075   print_rsync_version(F);
1076
1077   rprintf(F,"\n");
1078   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
1079   rprintf(F,"     --address=ADDRESS       bind to the specified address\n");
1080   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
1081   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
1082   rprintf(F," -M, --dparam=OVERRIDE       override global daemon config parameter\n");
1083   rprintf(F,"     --no-detach             do not detach from the parent\n");
1084   rprintf(F,"     --port=PORT             listen on alternate port number\n");
1085   rprintf(F,"     --log-file=FILE         override the \"log file\" setting\n");
1086   rprintf(F,"     --log-file-format=FMT   override the \"log format\" setting\n");
1087   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
1088   rprintf(F," -v, --verbose               increase verbosity\n");
1089   rprintf(F," -4, --ipv4                  prefer IPv4\n");
1090   rprintf(F," -6, --ipv6                  prefer IPv6\n");
1091   rprintf(F,"     --help                  show this help screen\n");
1092
1093   rprintf(F,"\n");
1094   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
1095   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
1096 }
1097
1098 static struct poptOption long_daemon_options[] = {
1099   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
1100   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1101   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
1102   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
1103   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
1104   {"dparam",          'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1105   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1106   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1107   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
1108   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
1109   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
1110   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
1111   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1112   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1113   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1114   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
1115   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1116   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
1117   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1118   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1119   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
1120   {0,0,0,0, 0, 0, 0}
1121 };
1122
1123
1124 static char err_buf[200];
1125
1126
1127 /**
1128  * Store the option error message, if any, so that we can log the
1129  * connection attempt (which requires parsing the options), and then
1130  * show the error later on.
1131  **/
1132 void option_error(void)
1133 {
1134         if (!err_buf[0]) {
1135                 strlcpy(err_buf, "Error parsing options: option may "
1136                         "be supported on client but not on server?\n",
1137                         sizeof err_buf);
1138         }
1139
1140         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
1141         msleep(20);
1142 }
1143
1144
1145 /**
1146  * Tweak the option table to disable all options that the rsyncd.conf
1147  * file has told us to refuse.
1148  **/
1149 static void set_refuse_options(char *bp)
1150 {
1151         struct poptOption *op;
1152         char *cp, shortname[2];
1153         int is_wild, found_match;
1154
1155         shortname[1] = '\0';
1156
1157         while (1) {
1158                 while (*bp == ' ') bp++;
1159                 if (!*bp)
1160                         break;
1161                 if ((cp = strchr(bp, ' ')) != NULL)
1162                         *cp= '\0';
1163                 is_wild = strpbrk(bp, "*?[") != NULL;
1164                 found_match = 0;
1165                 for (op = long_options; ; op++) {
1166                         *shortname = op->shortName;
1167                         if (!op->longName && !*shortname)
1168                                 break;
1169                         if ((op->longName && wildmatch(bp, op->longName))
1170                             || (*shortname && wildmatch(bp, shortname))) {
1171                                 if (op->argInfo == POPT_ARG_VAL)
1172                                         op->argInfo = POPT_ARG_NONE;
1173                                 op->val = (op - long_options) + OPT_REFUSED_BASE;
1174                                 found_match = 1;
1175                                 /* These flags are set to let us easily check
1176                                  * an implied option later in the code. */
1177                                 switch (*shortname) {
1178                                 case 'r': case 'd': case 'l': case 'p':
1179                                 case 't': case 'g': case 'o': case 'D':
1180                                         refused_archive_part = op->val;
1181                                         break;
1182                                 case 'z':
1183                                         refused_compress = op->val;
1184                                         break;
1185                                 case '\0':
1186                                         if (wildmatch("delete", op->longName))
1187                                                 refused_delete = op->val;
1188                                         else if (wildmatch("delete-before", op->longName))
1189                                                 refused_delete_before = op->val;
1190                                         else if (wildmatch("delete-during", op->longName))
1191                                                 refused_delete_during = op->val;
1192                                         else if (wildmatch("partial", op->longName))
1193                                                 refused_partial = op->val;
1194                                         else if (wildmatch("progress", op->longName))
1195                                                 refused_progress = op->val;
1196                                         else if (wildmatch("inplace", op->longName))
1197                                                 refused_inplace = op->val;
1198                                         else if (wildmatch("no-iconv", op->longName))
1199                                                 refused_no_iconv = op->val;
1200                                         break;
1201                                 }
1202                                 if (!is_wild)
1203                                         break;
1204                         }
1205                 }
1206                 if (!found_match) {
1207                         rprintf(FLOG, "No match for refuse-options string \"%s\"\n",
1208                                 bp);
1209                 }
1210                 if (!cp)
1211                         break;
1212                 *cp = ' ';
1213                 bp = cp + 1;
1214         }
1215 }
1216
1217
1218 static int count_args(const char **argv)
1219 {
1220         int i = 0;
1221
1222         if (argv) {
1223                 while (argv[i] != NULL)
1224                         i++;
1225         }
1226
1227         return i;
1228 }
1229
1230
1231 static OFF_T parse_size_arg(char **size_arg, char def_suf)
1232 {
1233         int reps, mult, make_compatible = 0;
1234         const char *arg;
1235         OFF_T size = 1;
1236
1237         for (arg = *size_arg; isDigit(arg); arg++) {}
1238         if (*arg == '.')
1239                 for (arg++; isDigit(arg); arg++) {}
1240         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
1241         case 'b': case 'B':
1242                 reps = 0;
1243                 break;
1244         case 'k': case 'K':
1245                 reps = 1;
1246                 break;
1247         case 'm': case 'M':
1248                 reps = 2;
1249                 break;
1250         case 'g': case 'G':
1251                 reps = 3;
1252                 break;
1253         default:
1254                 return -1;
1255         }
1256         if (*arg == 'b' || *arg == 'B')
1257                 mult = 1000, make_compatible = 1, arg++;
1258         else if (!*arg || *arg == '+' || *arg == '-')
1259                 mult = 1024;
1260         else if (strncasecmp(arg, "ib", 2) == 0)
1261                 mult = 1024, arg += 2;
1262         else
1263                 return -1;
1264         while (reps--)
1265                 size *= mult;
1266         size *= atof(*size_arg);
1267         if ((*arg == '+' || *arg == '-') && arg[1] == '1')
1268                 size += atoi(arg), make_compatible = 1, arg += 2;
1269         if (*arg)
1270                 return -1;
1271         if (size > 0 && make_compatible && def_suf == 'b') {
1272                 /* We convert this manually because we may need %lld precision,
1273                  * and that's not a portable sprintf() escape. */
1274                 char buf[128], *s = buf + sizeof buf - 1;
1275                 OFF_T num = size;
1276                 *s = '\0';
1277                 while (num) {
1278                         *--s = (char)(num % 10) + '0';
1279                         num /= 10;
1280                 }
1281                 if (!(*size_arg = strdup(s)))
1282                         out_of_memory("parse_size_arg");
1283         }
1284         return size;
1285 }
1286
1287
1288 static void create_refuse_error(int which)
1289 {
1290         /* The "which" value is the index + OPT_REFUSED_BASE. */
1291         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
1292         int n = snprintf(err_buf, sizeof err_buf,
1293                          "The server is configured to refuse --%s\n",
1294                          op->longName) - 1;
1295         if (op->shortName) {
1296                 snprintf(err_buf + n, sizeof err_buf - n,
1297                          " (-%c)\n", op->shortName);
1298         }
1299 }
1300
1301 /* This is used to make sure that --daemon & --server cannot be aliased to
1302  * something else. These options have always disabled popt aliases for the
1303  * parsing of a daemon or server command-line, but we have to make sure that
1304  * these options cannot vanish so that the alias disabling can take effect. */
1305 static void popt_unalias(poptContext con, const char *opt)
1306 {
1307         struct poptAlias unalias;
1308
1309         unalias.longName = opt + 2; /* point past the leading "--" */
1310         unalias.shortName = '\0';
1311         unalias.argc = 1;
1312         unalias.argv = new_array(const char*, 1);
1313         unalias.argv[0] = strdup(opt);
1314
1315         poptAddAlias(con, unalias, 0);
1316 }
1317
1318 /**
1319  * Process command line arguments.  Called on both local and remote.
1320  *
1321  * @retval 1 if all options are OK; with globals set to appropriate
1322  * values
1323  *
1324  * @retval 0 on error, with err_buf containing an explanation
1325  **/
1326 int parse_arguments(int *argc_p, const char ***argv_p)
1327 {
1328         static poptContext pc;
1329         char *ref = lp_refuse_options(module_id);
1330         const char *arg, **argv = *argv_p;
1331         int argc = *argc_p;
1332         int opt;
1333         int orig_protect_args = protect_args;
1334
1335         if (argc == 0) {
1336                 strlcpy(err_buf, "argc is zero!\n", sizeof err_buf);
1337                 return 0;
1338         }
1339         if (ref && *ref)
1340                 set_refuse_options(ref);
1341         if (am_daemon) {
1342                 set_refuse_options("log-file*");
1343 #ifdef ICONV_OPTION
1344                 if (!*lp_charset(module_id))
1345                         set_refuse_options("iconv");
1346 #endif
1347                 set_refuse_options("write-devices");
1348         }
1349
1350 #ifdef ICONV_OPTION
1351         if (!am_daemon && protect_args <= 0 && (arg = getenv("RSYNC_ICONV")) != NULL && *arg)
1352                 iconv_opt = strdup(arg);
1353 #endif
1354
1355         /* TODO: Call poptReadDefaultConfig; handle errors. */
1356
1357         /* The context leaks in case of an error, but if there's a
1358          * problem we always exit anyhow. */
1359         if (pc)
1360                 poptFreeContext(pc);
1361         pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1362         if (!am_server) {
1363                 poptReadDefaultConfig(pc, 0);
1364                 popt_unalias(pc, "--daemon");
1365                 popt_unalias(pc, "--server");
1366         }
1367
1368         while ((opt = poptGetNextOpt(pc)) != -1) {
1369                 /* most options are handled automatically by popt;
1370                  * only special cases are returned and listed here. */
1371
1372                 switch (opt) {
1373                 case OPT_VERSION:
1374                         print_rsync_version(FINFO);
1375                         exit_cleanup(0);
1376
1377                 case OPT_SERVER:
1378                         if (!am_server) {
1379                                 /* Disable popt aliases on the server side and
1380                                  * then start parsing the options again. */
1381                                 poptFreeContext(pc);
1382                                 pc = poptGetContext(RSYNC_NAME, argc, argv,
1383                                                     long_options, 0);
1384                                 am_server = 1;
1385                         }
1386 #ifdef ICONV_OPTION
1387                         iconv_opt = NULL;
1388 #endif
1389                         break;
1390
1391                 case OPT_SENDER:
1392                         if (!am_server) {
1393                                 usage(FERROR);
1394                                 exit_cleanup(RERR_SYNTAX);
1395                         }
1396                         am_sender = 1;
1397                         break;
1398
1399                 case OPT_DAEMON:
1400                         if (am_daemon) {
1401                                 strlcpy(err_buf,
1402                                         "Attempt to hack rsync thwarted!\n",
1403                                         sizeof err_buf);
1404                                 return 0;
1405                         }
1406 #ifdef ICONV_OPTION
1407                         iconv_opt = NULL;
1408 #endif
1409                         protect_args = 0;
1410                         poptFreeContext(pc);
1411                         pc = poptGetContext(RSYNC_NAME, argc, argv,
1412                                             long_daemon_options, 0);
1413                         while ((opt = poptGetNextOpt(pc)) != -1) {
1414                                 char **cpp;
1415                                 switch (opt) {
1416                                 case 'h':
1417                                         daemon_usage(FINFO);
1418                                         exit_cleanup(0);
1419
1420                                 case 'M':
1421                                         arg = poptGetOptArg(pc);
1422                                         if (!strchr(arg, '=')) {
1423                                                 rprintf(FERROR,
1424                                                     "--dparam value is missing an '=': %s\n",
1425                                                     arg);
1426                                                 goto daemon_error;
1427                                         }
1428                                         cpp = EXPAND_ITEM_LIST(&dparam_list, char *, 4);
1429                                         *cpp = strdup(arg);
1430                                         break;
1431
1432                                 case 'v':
1433                                         verbose++;
1434                                         break;
1435
1436                                 default:
1437                                         rprintf(FERROR,
1438                                             "rsync: %s: %s (in daemon mode)\n",
1439                                             poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1440                                             poptStrerror(opt));
1441                                         goto daemon_error;
1442                                 }
1443                         }
1444
1445                         if (dparam_list.count && !set_dparams(1))
1446                                 exit_cleanup(RERR_SYNTAX);
1447
1448                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1449                                 snprintf(err_buf, sizeof err_buf,
1450                                          "the --temp-dir path is WAY too long.\n");
1451                                 return 0;
1452                         }
1453
1454                         if (!daemon_opt) {
1455                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
1456                             daemon_error:
1457                                 rprintf(FERROR,
1458                                     "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
1459                                 exit_cleanup(RERR_SYNTAX);
1460                         }
1461
1462                         *argv_p = argv = poptGetArgs(pc);
1463                         *argc_p = argc = count_args(argv);
1464                         am_starting_up = 0;
1465                         daemon_opt = 0;
1466                         am_daemon = 1;
1467                         return 1;
1468
1469                 case OPT_MODIFY_WINDOW:
1470                         /* The value has already been set by popt, but
1471                          * we need to remember that we're using a
1472                          * non-default setting. */
1473                         modify_window_set = 1;
1474                         break;
1475
1476                 case OPT_FILTER:
1477                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1478                                         rule_template(0), 0);
1479                         break;
1480
1481                 case OPT_EXCLUDE:
1482                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1483                                         rule_template(0), XFLG_OLD_PREFIXES);
1484                         break;
1485
1486                 case OPT_INCLUDE:
1487                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1488                                         rule_template(FILTRULE_INCLUDE), XFLG_OLD_PREFIXES);
1489                         break;
1490
1491                 case OPT_EXCLUDE_FROM:
1492                 case OPT_INCLUDE_FROM:
1493                         arg = poptGetOptArg(pc);
1494                         if (sanitize_paths)
1495                                 arg = sanitize_path(NULL, arg, NULL, 0, SP_DEFAULT);
1496                         if (daemon_filter_list.head) {
1497                                 int rej;
1498                                 char *cp = strdup(arg);
1499                                 if (!cp)
1500                                         out_of_memory("parse_arguments");
1501                                 if (!*cp)
1502                                         rej = 1;
1503                                 else {
1504                                         char *dir = cp + (*cp == '/' ? module_dirlen : 0);
1505                                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1506                                         rej = check_filter(&daemon_filter_list, FLOG, dir, 0) < 0;
1507                                 }
1508                                 free(cp);
1509                                 if (rej)
1510                                         goto options_rejected;
1511                         }
1512                         parse_filter_file(&filter_list, arg,
1513                                 rule_template(opt == OPT_INCLUDE_FROM ? FILTRULE_INCLUDE : 0),
1514                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
1515                         break;
1516
1517                 case 'a':
1518                         if (refused_archive_part) {
1519                                 create_refuse_error(refused_archive_part);
1520                                 return 0;
1521                         }
1522                         if (!recurse) /* preserve recurse == 2 */
1523                                 recurse = 1;
1524 #ifdef SUPPORT_LINKS
1525                         preserve_links = 1;
1526 #endif
1527                         preserve_perms = 1;
1528                         preserve_times = 1;
1529                         preserve_gid = 1;
1530                         preserve_uid = 1;
1531                         preserve_devices = 1;
1532                         preserve_specials = 1;
1533                         break;
1534
1535                 case 'D':
1536                         preserve_devices = preserve_specials = 1;
1537                         break;
1538
1539                 case OPT_NO_D:
1540                         preserve_devices = preserve_specials = 0;
1541                         break;
1542
1543                 case 'h':
1544                         human_readable++;
1545                         break;
1546
1547                 case 'H':
1548                         preserve_hard_links++;
1549                         break;
1550
1551                 case 'i':
1552                         itemize_changes++;
1553                         break;
1554
1555                 case 'U':
1556                         if (++preserve_atimes > 1)
1557                             open_noatime = 1;
1558                         break;
1559
1560                 case 'v':
1561                         verbose++;
1562                         break;
1563
1564                 case 'y':
1565                         fuzzy_basis++;
1566                         break;
1567
1568                 case 'q':
1569                         quiet++;
1570                         break;
1571
1572                 case 'x':
1573                         one_file_system++;
1574                         break;
1575
1576                 case 'F':
1577                         switch (++F_option_cnt) {
1578                         case 1:
1579                                 parse_filter_str(&filter_list,": /.rsync-filter",rule_template(0),0);
1580                                 break;
1581                         case 2:
1582                                 parse_filter_str(&filter_list,"- .rsync-filter",rule_template(0),0);
1583                                 break;
1584                         }
1585                         break;
1586
1587                 case 'P':
1588                         if (refused_partial || refused_progress) {
1589                                 create_refuse_error(refused_partial
1590                                     ? refused_partial : refused_progress);
1591                                 return 0;
1592                         }
1593                         do_progress = 1;
1594                         keep_partial = 1;
1595                         break;
1596
1597                 case 'z':
1598                         do_compression++;
1599                         break;
1600
1601                 case 'M':
1602                         arg = poptGetOptArg(pc);
1603                         if (*arg != '-') {
1604                                 snprintf(err_buf, sizeof err_buf,
1605                                         "Remote option must start with a dash: %s\n", arg);
1606                                 return 0;
1607                         }
1608                         if (remote_option_cnt+2 >= remote_option_alloc) {
1609                                 remote_option_alloc += 16;
1610                                 remote_options = realloc_array(remote_options,
1611                                                         const char *, remote_option_alloc);
1612                                 if (!remote_options)
1613                                         out_of_memory("parse_arguments");
1614                                 if (!remote_option_cnt)
1615                                         remote_options[0] = "ARG0";
1616                         }
1617                         remote_options[++remote_option_cnt] = arg;
1618                         remote_options[remote_option_cnt+1] = NULL;
1619                         break;
1620
1621                 case OPT_WRITE_BATCH:
1622                         /* batch_name is already set */
1623                         write_batch = 1;
1624                         break;
1625
1626                 case OPT_ONLY_WRITE_BATCH:
1627                         /* batch_name is already set */
1628                         write_batch = -1;
1629                         break;
1630
1631                 case OPT_READ_BATCH:
1632                         /* batch_name is already set */
1633                         read_batch = 1;
1634                         break;
1635
1636                 case OPT_NO_ICONV:
1637 #ifdef ICONV_OPTION
1638                         iconv_opt = NULL;
1639 #endif
1640                         break;
1641
1642                 case OPT_MAX_SIZE:
1643                         if ((max_size = parse_size_arg(&max_size_arg, 'b')) < 0) {
1644                                 snprintf(err_buf, sizeof err_buf,
1645                                         "--max-size value is invalid: %s\n",
1646                                         max_size_arg);
1647                                 return 0;
1648                         }
1649                         break;
1650
1651                 case OPT_MIN_SIZE:
1652                         if ((min_size = parse_size_arg(&min_size_arg, 'b')) < 0) {
1653                                 snprintf(err_buf, sizeof err_buf,
1654                                         "--min-size value is invalid: %s\n",
1655                                         min_size_arg);
1656                                 return 0;
1657                         }
1658                         break;
1659
1660                 case OPT_BWLIMIT:
1661                         {
1662                                 OFF_T limit = parse_size_arg(&bwlimit_arg, 'K');
1663                                 if (limit < 0) {
1664                                         snprintf(err_buf, sizeof err_buf,
1665                                                 "--bwlimit value is invalid: %s\n", bwlimit_arg);
1666                                         return 0;
1667                                 }
1668                                 bwlimit = (limit + 512) / 1024;
1669                                 if (limit && !bwlimit) {
1670                                         snprintf(err_buf, sizeof err_buf,
1671                                                 "--bwlimit value is too small: %s\n", bwlimit_arg);
1672                                         return 0;
1673                                 }
1674                         }
1675                         break;
1676
1677                 case OPT_APPEND:
1678                         if (am_server)
1679                                 append_mode++;
1680                         else
1681                                 append_mode = 1;
1682                         break;
1683
1684                 case OPT_LINK_DEST:
1685 #ifdef SUPPORT_HARD_LINKS
1686                         link_dest = 1;
1687                         dest_option = "--link-dest";
1688                         goto set_dest_dir;
1689 #else
1690                         snprintf(err_buf, sizeof err_buf,
1691                                  "hard links are not supported on this %s\n",
1692                                  am_server ? "server" : "client");
1693                         return 0;
1694 #endif
1695
1696                 case OPT_COPY_DEST:
1697                         copy_dest = 1;
1698                         dest_option = "--copy-dest";
1699                         goto set_dest_dir;
1700
1701                 case OPT_COMPARE_DEST:
1702                         compare_dest = 1;
1703                         dest_option = "--compare-dest";
1704                 set_dest_dir:
1705                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1706                                 snprintf(err_buf, sizeof err_buf,
1707                                         "ERROR: at most %d %s args may be specified\n",
1708                                         MAX_BASIS_DIRS, dest_option);
1709                                 return 0;
1710                         }
1711                         /* We defer sanitizing this arg until we know what
1712                          * our destination directory is going to be. */
1713                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1714                         break;
1715
1716                 case OPT_CHMOD:
1717                         arg = poptGetOptArg(pc);
1718                         if (!parse_chmod(arg, &chmod_modes)) {
1719                                 snprintf(err_buf, sizeof err_buf,
1720                                     "Invalid argument passed to --chmod (%s)\n",
1721                                     arg);
1722                                 return 0;
1723                         }
1724                         break;
1725
1726                 case OPT_INFO:
1727                         arg = poptGetOptArg(pc);
1728                         parse_output_words(info_words, info_levels, arg, USER_PRIORITY);
1729                         break;
1730
1731                 case OPT_DEBUG:
1732                         arg = poptGetOptArg(pc);
1733                         parse_output_words(debug_words, debug_levels, arg, USER_PRIORITY);
1734                         break;
1735
1736                 case OPT_USERMAP:
1737                         if (usermap) {
1738                                 if (usermap_via_chown) {
1739                                         snprintf(err_buf, sizeof err_buf,
1740                                             "--usermap conflicts with prior --chown.\n");
1741                                         return 0;
1742                                 }
1743                                 snprintf(err_buf, sizeof err_buf,
1744                                     "You can only specify --usermap once.\n");
1745                                 return 0;
1746                         }
1747                         usermap = (char *)poptGetOptArg(pc);
1748                         usermap_via_chown = False;
1749                         break;
1750
1751                 case OPT_GROUPMAP:
1752                         if (groupmap) {
1753                                 if (groupmap_via_chown) {
1754                                         snprintf(err_buf, sizeof err_buf,
1755                                             "--groupmap conflicts with prior --chown.\n");
1756                                         return 0;
1757                                 }
1758                                 snprintf(err_buf, sizeof err_buf,
1759                                     "You can only specify --groupmap once.\n");
1760                                 return 0;
1761                         }
1762                         groupmap = (char *)poptGetOptArg(pc);
1763                         groupmap_via_chown = False;
1764                         break;
1765
1766                 case OPT_CHOWN: {
1767                         const char *chown = poptGetOptArg(pc);
1768                         int len;
1769                         if ((arg = strchr(chown, ':')) != NULL)
1770                                 len = arg++ - chown;
1771                         else
1772                                 len = strlen(chown);
1773                         if (len) {
1774                                 if (usermap) {
1775                                         if (!usermap_via_chown) {
1776                                                 snprintf(err_buf, sizeof err_buf,
1777                                                     "--chown conflicts with prior --usermap.\n");
1778                                                 return 0;
1779                                         }
1780                                         snprintf(err_buf, sizeof err_buf,
1781                                             "You can only specify a user-affecting --chown once.\n");
1782                                         return 0;
1783                                 }
1784                                 if (asprintf(&usermap, "*:%.*s", len, chown) < 0)
1785                                         out_of_memory("parse_arguments");
1786                                 usermap_via_chown = True;
1787                         }
1788                         if (arg && *arg) {
1789                                 if (groupmap) {
1790                                         if (!groupmap_via_chown) {
1791                                                 snprintf(err_buf, sizeof err_buf,
1792                                                     "--chown conflicts with prior --groupmap.\n");
1793                                                 return 0;
1794                                         }
1795                                         snprintf(err_buf, sizeof err_buf,
1796                                             "You can only specify a group-affecting --chown once.\n");
1797                                         return 0;
1798                                 }
1799                                 if (asprintf(&groupmap, "*:%s", arg) < 0)
1800                                         out_of_memory("parse_arguments");
1801                                 groupmap_via_chown = True;
1802                         }
1803                         break;
1804                 }
1805
1806                 case OPT_HELP:
1807                         usage(FINFO);
1808                         exit_cleanup(0);
1809
1810                 case 'A':
1811 #ifdef SUPPORT_ACLS
1812                         preserve_acls = 1;
1813                         preserve_perms = 1;
1814                         break;
1815 #else
1816                         /* FIXME: this should probably be ignored with a
1817                          * warning and then countermeasures taken to
1818                          * restrict group and other access in the presence
1819                          * of any more restrictive ACLs, but this is safe
1820                          * for now */
1821                         snprintf(err_buf,sizeof(err_buf),
1822                                  "ACLs are not supported on this %s\n",
1823                                  am_server ? "server" : "client");
1824                         return 0;
1825 #endif
1826
1827                 case 'X':
1828 #ifdef SUPPORT_XATTRS
1829                         preserve_xattrs++;
1830                         break;
1831 #else
1832                         snprintf(err_buf,sizeof(err_buf),
1833                                  "extended attributes are not supported on this %s\n",
1834                                  am_server ? "server" : "client");
1835                         return 0;
1836 #endif
1837
1838                 default:
1839                         /* A large opt value means that set_refuse_options()
1840                          * turned this option off. */
1841                         if (opt >= OPT_REFUSED_BASE) {
1842                                 create_refuse_error(opt);
1843                                 return 0;
1844                         }
1845                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
1846                                  am_server ? "on remote machine: " : "",
1847                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1848                                  poptStrerror(opt));
1849                         return 0;
1850                 }
1851         }
1852
1853         if (protect_args < 0) {
1854                 if (am_server)
1855                         protect_args = 0;
1856                 else if ((arg = getenv("RSYNC_PROTECT_ARGS")) != NULL && *arg)
1857                         protect_args = atoi(arg) ? 1 : 0;
1858                 else {
1859 #ifdef RSYNC_USE_PROTECTED_ARGS
1860                         protect_args = 1;
1861 #else
1862                         protect_args = 0;
1863 #endif
1864                 }
1865         }
1866
1867         if (checksum_choice && strcmp(checksum_choice, "auto") != 0 && strcmp(checksum_choice, "auto,auto") != 0) {
1868                 /* Call this early to verify the args and figure out if we need to force
1869                  * --whole-file. Note that the parse function will get called again later,
1870                  * just in case an "auto" choice needs to know the protocol_version. */
1871                 if (parse_checksum_choice())
1872                         whole_file = 1;
1873         } else
1874                 checksum_choice = NULL;
1875
1876         if (human_readable > 1 && argc == 2 && !am_server) {
1877                 /* Allow the old meaning of 'h' (--help) on its own. */
1878                 usage(FINFO);
1879                 exit_cleanup(0);
1880         }
1881
1882         if (do_compression || def_compress_level != NOT_SPECIFIED) {
1883                 if (def_compress_level == NOT_SPECIFIED)
1884                         def_compress_level = Z_DEFAULT_COMPRESSION;
1885                 else if (def_compress_level < Z_DEFAULT_COMPRESSION || def_compress_level > Z_BEST_COMPRESSION) {
1886                         snprintf(err_buf, sizeof err_buf, "--compress-level value is invalid: %d\n",
1887                                  def_compress_level);
1888                         return 0;
1889                 } else if (def_compress_level == Z_NO_COMPRESSION)
1890                         do_compression = 0;
1891                 else if (!do_compression)
1892                         do_compression = 1;
1893                 if (do_compression && refused_compress) {
1894                         create_refuse_error(refused_compress);
1895                         return 0;
1896                 }
1897 #ifdef EXTERNAL_ZLIB
1898                 if (do_compression == 1) {
1899                         snprintf(err_buf, sizeof err_buf,
1900                                 "This rsync lacks old-style --compress due to its external zlib.  Try -zz.\n");
1901                         if (am_server)
1902                                 return 0;
1903                         fprintf(stderr, "%s" "Continuing without compression.\n\n", err_buf);
1904                         do_compression = 0;
1905                 }
1906 #endif
1907         }
1908
1909 #ifdef HAVE_SETVBUF
1910         if (outbuf_mode && !am_server) {
1911                 int mode = *(uchar *)outbuf_mode;
1912                 if (islower(mode))
1913                         mode = toupper(mode);
1914                 fflush(stdout); /* Just in case... */
1915                 switch (mode) {
1916                 case 'N': /* None */
1917                 case 'U': /* Unbuffered */
1918                         mode = _IONBF;
1919                         break;
1920                 case 'L': /* Line */
1921                         mode = _IOLBF;
1922                         break;
1923                 case 'B': /* Block */
1924                 case 'F': /* Full */
1925                         mode = _IOFBF;
1926                         break;
1927                 default:
1928                         snprintf(err_buf, sizeof err_buf,
1929                                 "Invalid --outbuf setting -- specify N, L, or B.\n");
1930                         return 0;
1931                 }
1932                 setvbuf(stdout, (char *)NULL, mode, 0);
1933         }
1934
1935         if (msgs2stderr) {
1936                 /* Make stderr line buffered for better sharing of the stream. */
1937                 fflush(stderr); /* Just in case... */
1938                 setvbuf(stderr, (char *)NULL, _IOLBF, 0);
1939         }
1940 #endif
1941
1942         set_output_verbosity(verbose, DEFAULT_PRIORITY);
1943
1944         if (do_stats) {
1945                 parse_output_words(info_words, info_levels,
1946                         verbose > 1 ? "stats3" : "stats2", DEFAULT_PRIORITY);
1947         }
1948
1949 #ifdef ICONV_OPTION
1950         if (iconv_opt && protect_args != 2) {
1951                 if (!am_server && strcmp(iconv_opt, "-") == 0)
1952                         iconv_opt = NULL;
1953                 else
1954                         need_unsorted_flist = 1;
1955         }
1956         if (refused_no_iconv && !iconv_opt) {
1957                 create_refuse_error(refused_no_iconv);
1958                 return 0;
1959         }
1960 #endif
1961
1962         if (fuzzy_basis > 1)
1963                 fuzzy_basis = basis_dir_cnt + 1;
1964
1965         /* Don't let the client reset protect_args if it was already processed */
1966         if (orig_protect_args == 2 && am_server)
1967                 protect_args = orig_protect_args;
1968
1969         if (protect_args == 1 && am_server)
1970                 return 1;
1971
1972         *argv_p = argv = poptGetArgs(pc);
1973         *argc_p = argc = count_args(argv);
1974
1975 #ifndef SUPPORT_LINKS
1976         if (preserve_links && !am_sender) {
1977                 snprintf(err_buf, sizeof err_buf,
1978                          "symlinks are not supported on this %s\n",
1979                          am_server ? "server" : "client");
1980                 return 0;
1981         }
1982 #endif
1983
1984 #ifndef SUPPORT_HARD_LINKS
1985         if (preserve_hard_links) {
1986                 snprintf(err_buf, sizeof err_buf,
1987                          "hard links are not supported on this %s\n",
1988                          am_server ? "server" : "client");
1989                 return 0;
1990         }
1991 #endif
1992
1993 #ifdef SUPPORT_XATTRS
1994         if (am_root < 0 && preserve_xattrs > 1) {
1995                 snprintf(err_buf, sizeof err_buf,
1996                          "--fake-super conflicts with -XX\n");
1997                 return 0;
1998         }
1999 #else
2000         if (am_root < 0) {
2001                 snprintf(err_buf, sizeof err_buf,
2002                          "--fake-super requires an rsync with extended attributes enabled\n");
2003                 return 0;
2004         }
2005 #endif
2006
2007         if (block_size) {
2008                 /* We may not know the real protocol_version at this point if this is the client
2009                  * option parsing, but we still want to check it so that the client can specify
2010                  * a --protocol=29 option with a larger block size. */
2011                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
2012
2013                 if (block_size > max_blength) {
2014                         snprintf(err_buf, sizeof err_buf,
2015                                  "--block-size=%lu is too large (max: %u)\n", block_size, max_blength);
2016                         return 0;
2017                 }
2018         }
2019
2020         if (write_batch && read_batch) {
2021                 snprintf(err_buf, sizeof err_buf,
2022                         "--write-batch and --read-batch can not be used together\n");
2023                 return 0;
2024         }
2025         if (write_batch > 0 || read_batch) {
2026                 if (am_server) {
2027                         rprintf(FINFO,
2028                                 "ignoring --%s-batch option sent to server\n",
2029                                 write_batch ? "write" : "read");
2030                         /* We don't actually exit_cleanup(), so that we can
2031                          * still service older version clients that still send
2032                          * batch args to server. */
2033                         read_batch = write_batch = 0;
2034                         batch_name = NULL;
2035                 } else if (dry_run)
2036                         write_batch = 0;
2037         } else if (write_batch < 0 && dry_run)
2038                 write_batch = 0;
2039         if (read_batch && files_from) {
2040                 snprintf(err_buf, sizeof err_buf,
2041                         "--read-batch cannot be used with --files-from\n");
2042                 return 0;
2043         }
2044         if (read_batch && remove_source_files) {
2045                 snprintf(err_buf, sizeof err_buf,
2046                         "--read-batch cannot be used with --remove-%s-files\n",
2047                         remove_source_files == 1 ? "source" : "sent");
2048                 return 0;
2049         }
2050         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
2051                 snprintf(err_buf, sizeof err_buf,
2052                         "the batch-file name must be %d characters or less.\n",
2053                         MAX_BATCH_NAME_LEN);
2054                 return 0;
2055         }
2056
2057         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
2058                 snprintf(err_buf, sizeof err_buf,
2059                          "the --temp-dir path is WAY too long.\n");
2060                 return 0;
2061         }
2062
2063         if (max_delete < 0 && max_delete != INT_MIN) {
2064                 /* Negative numbers are treated as "no deletions". */
2065                 max_delete = 0;
2066         }
2067
2068         if (compare_dest + copy_dest + link_dest > 1) {
2069                 snprintf(err_buf, sizeof err_buf,
2070                         "You may not mix --compare-dest, --copy-dest, and --link-dest.\n");
2071                 return 0;
2072         }
2073
2074         if (files_from) {
2075                 if (recurse == 1) /* preserve recurse == 2 */
2076                         recurse = 0;
2077                 if (xfer_dirs < 0)
2078                         xfer_dirs = 1;
2079         }
2080
2081         if (argc < 2 && !read_batch && !am_server)
2082                 list_only |= 1;
2083
2084         if (xfer_dirs >= 4) {
2085                 parse_filter_str(&filter_list, "- /*/*", rule_template(0), 0);
2086                 recurse = xfer_dirs = 1;
2087         } else if (recurse)
2088                 xfer_dirs = 1;
2089         else if (xfer_dirs < 0)
2090                 xfer_dirs = list_only ? 1 : 0;
2091
2092         if (relative_paths < 0)
2093                 relative_paths = files_from? 1 : 0;
2094         if (!relative_paths)
2095                 implied_dirs = 0;
2096
2097         if (delete_before + !!delete_during + delete_after > 1) {
2098                 snprintf(err_buf, sizeof err_buf,
2099                         "You may not combine multiple --delete-WHEN options.\n");
2100                 return 0;
2101         }
2102         if (delete_before || delete_during || delete_after)
2103                 delete_mode = 1;
2104         else if (delete_mode || delete_excluded) {
2105                 /* Only choose now between before & during if one is refused. */
2106                 if (refused_delete_before) {
2107                         if (!refused_delete_during)
2108                                 delete_during = 1;
2109                         else {
2110                                 create_refuse_error(refused_delete_before);
2111                                 return 0;
2112                         }
2113                 } else if (refused_delete_during)
2114                         delete_before = 1;
2115                 delete_mode = 1;
2116         }
2117         if (!xfer_dirs && delete_mode) {
2118                 snprintf(err_buf, sizeof err_buf,
2119                         "--delete does not work without --recursive (-r) or --dirs (-d).\n");
2120                 return 0;
2121         }
2122
2123         if (missing_args == 3) /* simplify if both options were specified */
2124                 missing_args = 2;
2125         if (refused_delete && (delete_mode || missing_args == 2)) {
2126                 create_refuse_error(refused_delete);
2127                 return 0;
2128         }
2129
2130         if (remove_source_files) {
2131                 /* We only want to infer this refusal of --remove-source-files
2132                  * via the refusal of "delete", not any of the "delete-FOO"
2133                  * options. */
2134                 if (refused_delete && am_sender) {
2135                         create_refuse_error(refused_delete);
2136                         return 0;
2137                 }
2138                 need_messages_from_generator = 1;
2139         }
2140
2141         if (munge_symlinks && !am_daemon) {
2142                 STRUCT_STAT st;
2143                 char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */
2144                 strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */
2145                 if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) {
2146                         rprintf(FERROR, "Symlink munging is unsafe when a %s directory exists.\n",
2147                                 prefix);
2148                         exit_cleanup(RERR_UNSUPPORTED);
2149                 }
2150         }
2151
2152         if (sanitize_paths) {
2153                 int i;
2154                 for (i = argc; i-- > 0; )
2155                         argv[i] = sanitize_path(NULL, argv[i], "", 0, SP_KEEP_DOT_DIRS);
2156                 if (tmpdir)
2157                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, SP_DEFAULT);
2158                 if (backup_dir)
2159                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, SP_DEFAULT);
2160         }
2161         if (daemon_filter_list.head && !am_sender) {
2162                 filter_rule_list *elp = &daemon_filter_list;
2163                 if (tmpdir) {
2164                         char *dir;
2165                         if (!*tmpdir)
2166                                 goto options_rejected;
2167                         dir = tmpdir + (*tmpdir == '/' ? module_dirlen : 0);
2168                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2169                         if (check_filter(elp, FLOG, dir, 1) < 0)
2170                                 goto options_rejected;
2171                 }
2172                 if (backup_dir) {
2173                         char *dir;
2174                         if (!*backup_dir)
2175                                 goto options_rejected;
2176                         dir = backup_dir + (*backup_dir == '/' ? module_dirlen : 0);
2177                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2178                         if (check_filter(elp, FLOG, dir, 1) < 0)
2179                                 goto options_rejected;
2180                 }
2181         }
2182
2183         if (!backup_suffix)
2184                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
2185         backup_suffix_len = strlen(backup_suffix);
2186         if (strchr(backup_suffix, '/') != NULL) {
2187                 snprintf(err_buf, sizeof err_buf,
2188                         "--suffix cannot contain slashes: %s\n",
2189                         backup_suffix);
2190                 return 0;
2191         }
2192         if (backup_dir) {
2193                 size_t len;
2194                 while (*backup_dir == '.' && backup_dir[1] == '/')
2195                         backup_dir += 2;
2196                 if (*backup_dir == '.' && backup_dir[1] == '\0')
2197                         backup_dir++;
2198                 len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
2199                 if (len > sizeof backup_dir_buf - 128) {
2200                         snprintf(err_buf, sizeof err_buf,
2201                                 "the --backup-dir path is WAY too long.\n");
2202                         return 0;
2203                 }
2204                 backup_dir_len = (int)len;
2205                 if (!backup_dir_len) {
2206                         backup_dir_len = -1;
2207                         backup_dir = NULL;
2208                 } else if (backup_dir_buf[backup_dir_len - 1] != '/') {
2209                         backup_dir_buf[backup_dir_len++] = '/';
2210                         backup_dir_buf[backup_dir_len] = '\0';
2211                 }
2212                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
2213         }
2214         if (backup_dir) {
2215                 /* No need for a suffix or a protect rule. */
2216         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
2217                 snprintf(err_buf, sizeof err_buf,
2218                         "--suffix cannot be empty %s\n", backup_dir_len < 0
2219                         ? "when --backup-dir is the same as the dest dir"
2220                         : "without a --backup-dir");
2221                 return 0;
2222         } else if (make_backups && delete_mode && !delete_excluded && !am_server) {
2223                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
2224                         "P *%s", backup_suffix);
2225                 parse_filter_str(&filter_list, backup_dir_buf, rule_template(0), 0);
2226         }
2227
2228         if (preserve_times) {
2229                 preserve_times = PRESERVE_FILE_TIMES;
2230                 if (!omit_dir_times)
2231                         preserve_times |= PRESERVE_DIR_TIMES;
2232 #ifdef CAN_SET_SYMLINK_TIMES
2233                 if (!omit_link_times)
2234                         preserve_times |= PRESERVE_LINK_TIMES;
2235 #endif
2236         }
2237
2238         if (make_backups && !backup_dir) {
2239                 omit_dir_times = 0; /* Implied, so avoid -O to sender. */
2240                 preserve_times &= ~PRESERVE_DIR_TIMES;
2241         }
2242
2243         if (stdout_format) {
2244                 if (am_server && log_format_has(stdout_format, 'I'))
2245                         stdout_format_has_i = 2;
2246                 else if (log_format_has(stdout_format, 'i'))
2247                         stdout_format_has_i = itemize_changes | 1;
2248                 if (!log_format_has(stdout_format, 'b')
2249                  && !log_format_has(stdout_format, 'c')
2250                  && !log_format_has(stdout_format, 'C'))
2251                         log_before_transfer = !am_server;
2252         } else if (itemize_changes) {
2253                 stdout_format = "%i %n%L";
2254                 stdout_format_has_i = itemize_changes;
2255                 log_before_transfer = !am_server;
2256         }
2257
2258         if (do_progress && !am_server) {
2259                 if (!log_before_transfer && INFO_EQ(NAME, 0))
2260                         parse_output_words(info_words, info_levels, "name", DEFAULT_PRIORITY);
2261                 parse_output_words(info_words, info_levels, "flist2,progress", DEFAULT_PRIORITY);
2262         }
2263
2264         if (dry_run)
2265                 do_xfers = 0;
2266
2267         set_io_timeout(io_timeout);
2268
2269         if (INFO_GTE(NAME, 1) && !stdout_format) {
2270                 stdout_format = "%n%L";
2271                 log_before_transfer = !am_server;
2272         }
2273         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
2274                 stdout_format_has_o_or_i = 1;
2275
2276         if (logfile_name && !am_daemon) {
2277                 if (!logfile_format) {
2278                         logfile_format = "%i %n%L";
2279                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
2280                 } else {
2281                         if (log_format_has(logfile_format, 'i'))
2282                                 logfile_format_has_i = 1;
2283                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
2284                                 logfile_format_has_o_or_i = 1;
2285                 }
2286                 log_init(0);
2287         } else if (!am_daemon)
2288                 logfile_format = NULL;
2289
2290         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
2291                 bwlimit = daemon_bwlimit;
2292         if (bwlimit) {
2293                 bwlimit_writemax = (size_t)bwlimit * 128;
2294                 if (bwlimit_writemax < 512)
2295                         bwlimit_writemax = 512;
2296         }
2297
2298         if (append_mode) {
2299                 if (whole_file > 0) {
2300                         snprintf(err_buf, sizeof err_buf,
2301                                  "--append cannot be used with --whole-file\n");
2302                         return 0;
2303                 }
2304                 if (refused_inplace) {
2305                         create_refuse_error(refused_inplace);
2306                         return 0;
2307                 }
2308                 inplace = 1;
2309         }
2310
2311         if (write_devices) {
2312                 if (refused_inplace) {
2313                         create_refuse_error(refused_inplace);
2314                         return 0;
2315                 }
2316                 inplace = 1;
2317         }
2318
2319         if (delay_updates && !partial_dir)
2320                 partial_dir = tmp_partialdir;
2321
2322         if (inplace) {
2323 #ifdef HAVE_FTRUNCATE
2324                 if (partial_dir) {
2325                         snprintf(err_buf, sizeof err_buf,
2326                                  "--%s cannot be used with --%s\n",
2327                                  append_mode ? "append" : "inplace",
2328                                  delay_updates ? "delay-updates" : "partial-dir");
2329                         return 0;
2330                 }
2331                 /* --inplace implies --partial for refusal purposes, but we
2332                  * clear the keep_partial flag for internal logic purposes. */
2333                 if (refused_partial) {
2334                         create_refuse_error(refused_partial);
2335                         return 0;
2336                 }
2337                 keep_partial = 0;
2338 #else
2339                 snprintf(err_buf, sizeof err_buf,
2340                          "--%s is not supported on this %s\n",
2341                          append_mode ? "append" : "inplace",
2342                          am_server ? "server" : "client");
2343                 return 0;
2344 #endif
2345         } else {
2346                 if (keep_partial && !partial_dir && !am_server) {
2347                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
2348                                 partial_dir = strdup(arg);
2349                 }
2350                 if (partial_dir) {
2351                         if (*partial_dir)
2352                                 clean_fname(partial_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2353                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
2354                                 partial_dir = NULL;
2355                         if (!partial_dir && refused_partial) {
2356                                 create_refuse_error(refused_partial);
2357                                 return 0;
2358                         }
2359                         keep_partial = 1;
2360                 }
2361         }
2362
2363         if (files_from) {
2364                 char *h, *p;
2365                 int q;
2366                 if (argc > 2 || (!am_daemon && !am_server && argc == 1)) {
2367                         usage(FERROR);
2368                         exit_cleanup(RERR_SYNTAX);
2369                 }
2370                 if (strcmp(files_from, "-") == 0) {
2371                         filesfrom_fd = 0;
2372                         if (am_server)
2373                                 filesfrom_host = ""; /* reading from socket */
2374                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
2375                         if (am_server) {
2376                                 snprintf(err_buf, sizeof err_buf,
2377                                         "The --files-from sent to the server cannot specify a host.\n");
2378                                 return 0;
2379                         }
2380                         files_from = p;
2381                         filesfrom_host = h;
2382                         if (strcmp(files_from, "-") == 0) {
2383                                 snprintf(err_buf, sizeof err_buf,
2384                                         "Invalid --files-from remote filename\n");
2385                                 return 0;
2386                         }
2387                 } else {
2388                         if (sanitize_paths)
2389                                 files_from = sanitize_path(NULL, files_from, NULL, 0, SP_DEFAULT);
2390                         if (daemon_filter_list.head) {
2391                                 char *dir;
2392                                 if (!*files_from)
2393                                         goto options_rejected;
2394                                 dir = files_from + (*files_from == '/' ? module_dirlen : 0);
2395                                 clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2396                                 if (check_filter(&daemon_filter_list, FLOG, dir, 0) < 0)
2397                                         goto options_rejected;
2398                         }
2399                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
2400                         if (filesfrom_fd < 0) {
2401                                 snprintf(err_buf, sizeof err_buf,
2402                                         "failed to open files-from file %s: %s\n",
2403                                         files_from, strerror(errno));
2404                                 return 0;
2405                         }
2406                 }
2407         }
2408
2409         am_starting_up = 0;
2410
2411         return 1;
2412
2413   options_rejected:
2414         snprintf(err_buf, sizeof err_buf,
2415                 "Your options have been rejected by the server.\n");
2416         return 0;
2417 }
2418
2419
2420 /**
2421  * Construct a filtered list of options to pass through from the
2422  * client to the server.
2423  *
2424  * This involves setting options that will tell the server how to
2425  * behave, and also filtering out options that are processed only
2426  * locally.
2427  **/
2428 void server_options(char **args, int *argc_p)
2429 {
2430         static char argstr[64];
2431         int ac = *argc_p;
2432         uchar where;
2433         char *arg;
2434         int i, x;
2435
2436         /* This should always remain first on the server's command-line. */
2437         args[ac++] = "--server";
2438
2439         if (daemon_over_rsh > 0) {
2440                 args[ac++] = "--daemon";
2441                 *argc_p = ac;
2442                 /* if we're passing --daemon, we're done */
2443                 return;
2444         }
2445
2446         if (!am_sender)
2447                 args[ac++] = "--sender";
2448
2449         x = 1;
2450         argstr[0] = '-';
2451
2452         if (protect_args)
2453                 argstr[x++] = 's';
2454
2455         for (i = 0; i < verbose; i++)
2456                 argstr[x++] = 'v';
2457
2458         /* the -q option is intentionally left out */
2459         if (make_backups)
2460                 argstr[x++] = 'b';
2461         if (update_only)
2462                 argstr[x++] = 'u';
2463         if (!do_xfers) /* Note: NOT "dry_run"! */
2464                 argstr[x++] = 'n';
2465         if (preserve_links)
2466                 argstr[x++] = 'l';
2467         if ((xfer_dirs >= 2 && xfer_dirs < 4)
2468          || (xfer_dirs && !recurse && (list_only || (delete_mode && am_sender))))
2469                 argstr[x++] = 'd';
2470         if (am_sender) {
2471                 if (keep_dirlinks)
2472                         argstr[x++] = 'K';
2473                 if (prune_empty_dirs)
2474                         argstr[x++] = 'm';
2475                 if (omit_dir_times)
2476                         argstr[x++] = 'O';
2477                 if (omit_link_times)
2478                         argstr[x++] = 'J';
2479                 if (fuzzy_basis) {
2480                         argstr[x++] = 'y';
2481                         if (fuzzy_basis > 1)
2482                                 argstr[x++] = 'y';
2483                 }
2484         } else {
2485                 if (copy_links)
2486                         argstr[x++] = 'L';
2487                 if (copy_dirlinks)
2488                         argstr[x++] = 'k';
2489         }
2490
2491         if (whole_file > 0)
2492                 argstr[x++] = 'W';
2493         /* We don't need to send --no-whole-file, because it's the
2494          * default for remote transfers, and in any case old versions
2495          * of rsync will not understand it. */
2496
2497         if (preserve_hard_links) {
2498                 argstr[x++] = 'H';
2499                 if (preserve_hard_links > 1)
2500                         argstr[x++] = 'H';
2501         }
2502         if (preserve_uid)
2503                 argstr[x++] = 'o';
2504         if (preserve_gid)
2505                 argstr[x++] = 'g';
2506         if (preserve_devices) /* ignore preserve_specials here */
2507                 argstr[x++] = 'D';
2508         if (preserve_times)
2509                 argstr[x++] = 't';
2510         if (preserve_atimes) {
2511                 argstr[x++] = 'U';
2512                 if (preserve_atimes > 1)
2513                         argstr[x++] = 'U';
2514         }
2515         if (preserve_perms)
2516                 argstr[x++] = 'p';
2517         else if (preserve_executability && am_sender)
2518                 argstr[x++] = 'E';
2519 #ifdef SUPPORT_ACLS
2520         if (preserve_acls)
2521                 argstr[x++] = 'A';
2522 #endif
2523 #ifdef SUPPORT_XATTRS
2524         if (preserve_xattrs) {
2525                 argstr[x++] = 'X';
2526                 if (preserve_xattrs > 1)
2527                         argstr[x++] = 'X';
2528         }
2529 #endif
2530         if (recurse)
2531                 argstr[x++] = 'r';
2532         if (always_checksum)
2533                 argstr[x++] = 'c';
2534         if (cvs_exclude)
2535                 argstr[x++] = 'C';
2536         if (ignore_times)
2537                 argstr[x++] = 'I';
2538         if (relative_paths)
2539                 argstr[x++] = 'R';
2540         if (one_file_system) {
2541                 argstr[x++] = 'x';
2542                 if (one_file_system > 1)
2543                         argstr[x++] = 'x';
2544         }
2545         if (sparse_files)
2546                 argstr[x++] = 'S';
2547         if (do_compression == 1)
2548                 argstr[x++] = 'z';
2549
2550         set_allow_inc_recurse();
2551
2552         /* We don't really know the actual protocol_version at this point,
2553          * but checking the pre-negotiated value allows the user to use a
2554          * --protocol=29 override to avoid the use of this -eFLAGS opt. */
2555         if (protocol_version >= 30) {
2556                 /* Use "eFlags" alias so that cull_options doesn't think that these are no-arg option letters. */
2557 #define eFlags argstr
2558                 /* We make use of the -e option to let the server know about
2559                  * any pre-release protocol version && some behavior flags. */
2560                 eFlags[x++] = 'e';
2561 #if SUBPROTOCOL_VERSION != 0
2562                 if (protocol_version == PROTOCOL_VERSION) {
2563                         x += snprintf(argstr+x, sizeof argstr - x,
2564                                       "%d.%d",
2565                                       PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
2566                 } else
2567 #endif
2568                         eFlags[x++] = '.';
2569                 if (allow_inc_recurse)
2570                         eFlags[x++] = 'i';
2571 #ifdef CAN_SET_SYMLINK_TIMES
2572                 eFlags[x++] = 'L'; /* symlink time-setting support */
2573 #endif
2574 #ifdef ICONV_OPTION
2575                 eFlags[x++] = 's'; /* symlink iconv translation support */
2576 #endif
2577                 eFlags[x++] = 'f'; /* flist I/O-error safety support */
2578                 eFlags[x++] = 'x'; /* xattr hardlink optimization not desired */
2579                 eFlags[x++] = 'C'; /* support checksum seed order fix */
2580 #undef eFlags
2581         }
2582
2583         if (x >= (int)sizeof argstr) { /* Not possible... */
2584                 rprintf(FERROR, "argstr overflow in server_options().\n");
2585                 exit_cleanup(RERR_MALLOC);
2586         }
2587
2588         argstr[x] = '\0';
2589
2590         if (x > 1)
2591                 args[ac++] = argstr;
2592
2593 #ifdef ICONV_OPTION
2594         if (iconv_opt) {
2595                 char *set = strchr(iconv_opt, ',');
2596                 if (set)
2597                         set++;
2598                 else
2599                         set = iconv_opt;
2600                 if (asprintf(&arg, "--iconv=%s", set) < 0)
2601                         goto oom;
2602                 args[ac++] = arg;
2603         }
2604 #endif
2605
2606         if (protect_args && !local_server) /* unprotected args stop here */
2607                 args[ac++] = NULL;
2608
2609         if (list_only > 1)
2610                 args[ac++] = "--list-only";
2611
2612         /* This makes sure that the remote rsync can handle deleting with -d
2613          * sans -r because the --no-r option was added at the same time. */
2614         if (xfer_dirs && !recurse && delete_mode && am_sender)
2615                 args[ac++] = "--no-r";
2616
2617         if (do_compression && def_compress_level != Z_DEFAULT_COMPRESSION) {
2618                 if (asprintf(&arg, "--compress-level=%d", def_compress_level) < 0)
2619                         goto oom;
2620                 args[ac++] = arg;
2621         }
2622
2623         if (preserve_devices) {
2624                 /* Note: sending "--devices" would not be backward-compatible. */
2625                 if (!preserve_specials)
2626                         args[ac++] = "--no-specials"; /* -D is already set. */
2627         } else if (preserve_specials)
2628                 args[ac++] = "--specials";
2629
2630         /* The server side doesn't use our log-format, but in certain
2631          * circumstances they need to know a little about the option. */
2632         if (stdout_format && am_sender) {
2633                 /* Use --log-format, not --out-format, for compatibility. */
2634                 if (stdout_format_has_i > 1)
2635                         args[ac++] = "--log-format=%i%I";
2636                 else if (stdout_format_has_i)
2637                         args[ac++] = "--log-format=%i";
2638                 else if (stdout_format_has_o_or_i)
2639                         args[ac++] = "--log-format=%o";
2640                 else if (!verbose)
2641                         args[ac++] = "--log-format=X";
2642         }
2643
2644         if (block_size) {
2645                 if (asprintf(&arg, "-B%lu", block_size) < 0)
2646                         goto oom;
2647                 args[ac++] = arg;
2648         }
2649
2650         if (io_timeout) {
2651                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
2652                         goto oom;
2653                 args[ac++] = arg;
2654         }
2655
2656         if (bwlimit) {
2657                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
2658                         goto oom;
2659                 args[ac++] = arg;
2660         }
2661
2662         if (backup_dir) {
2663                 args[ac++] = "--backup-dir";
2664                 args[ac++] = backup_dir;
2665         }
2666
2667         /* Only send --suffix if it specifies a non-default value. */
2668         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
2669                 /* We use the following syntax to avoid weirdness with '~'. */
2670                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
2671                         goto oom;
2672                 args[ac++] = arg;
2673         }
2674
2675         if (checksum_choice) {
2676                 if (asprintf(&arg, "--checksum-choice=%s", checksum_choice) < 0)
2677                         goto oom;
2678                 args[ac++] = arg;
2679         }
2680
2681         if (am_sender) {
2682                 if (max_delete > 0) {
2683                         if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
2684                                 goto oom;
2685                         args[ac++] = arg;
2686                 } else if (max_delete == 0)
2687                         args[ac++] = "--max-delete=-1";
2688                 if (min_size >= 0) {
2689                         args[ac++] = "--min-size";
2690                         args[ac++] = min_size_arg;
2691                 }
2692                 if (max_size >= 0) {
2693                         args[ac++] = "--max-size";
2694                         args[ac++] = max_size_arg;
2695                 }
2696                 if (delete_before)
2697                         args[ac++] = "--delete-before";
2698                 else if (delete_during == 2)
2699                         args[ac++] = "--delete-delay";
2700                 else if (delete_during)
2701                         args[ac++] = "--delete-during";
2702                 else if (delete_after)
2703                         args[ac++] = "--delete-after";
2704                 else if (delete_mode && !delete_excluded)
2705                         args[ac++] = "--delete";
2706                 if (delete_excluded)
2707                         args[ac++] = "--delete-excluded";
2708                 if (force_delete)
2709                         args[ac++] = "--force";
2710                 if (write_batch < 0)
2711                         args[ac++] = "--only-write-batch=X";
2712                 if (am_root > 1)
2713                         args[ac++] = "--super";
2714                 if (size_only)
2715                         args[ac++] = "--size-only";
2716                 if (do_stats)
2717                         args[ac++] = "--stats";
2718         } else {
2719                 if (skip_compress) {
2720                         if (asprintf(&arg, "--skip-compress=%s", skip_compress) < 0)
2721                                 goto oom;
2722                         args[ac++] = arg;
2723                 }
2724         }
2725
2726         /* --delete-missing-args needs the cooperation of both sides, but
2727          * the sender can handle --ignore-missing-args by itself. */
2728         if (missing_args == 2)
2729                 args[ac++] = "--delete-missing-args";
2730         else if (missing_args == 1 && !am_sender)
2731                 args[ac++] = "--ignore-missing-args";
2732
2733         if (modify_window_set && am_sender) {
2734                 char *fmt = modify_window < 0 ? "-@%d" : "--modify-window=%d";
2735                 if (asprintf(&arg, fmt, modify_window) < 0)
2736                         goto oom;
2737                 args[ac++] = arg;
2738         }
2739
2740         if (checksum_seed) {
2741                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
2742                         goto oom;
2743                 args[ac++] = arg;
2744         }
2745
2746         if (partial_dir && am_sender) {
2747                 if (partial_dir != tmp_partialdir) {
2748                         args[ac++] = "--partial-dir";
2749                         args[ac++] = partial_dir;
2750                 }
2751                 if (delay_updates)
2752                         args[ac++] = "--delay-updates";
2753         } else if (keep_partial && am_sender)
2754                 args[ac++] = "--partial";
2755
2756         if (ignore_errors)
2757                 args[ac++] = "--ignore-errors";
2758
2759         if (copy_unsafe_links)
2760                 args[ac++] = "--copy-unsafe-links";
2761
2762         if (safe_symlinks)
2763                 args[ac++] = "--safe-links";
2764
2765         if (numeric_ids)
2766                 args[ac++] = "--numeric-ids";
2767
2768         if (use_qsort)
2769                 args[ac++] = "--use-qsort";
2770
2771         if (am_sender) {
2772                 if (usermap) {
2773                         if (asprintf(&arg, "--usermap=%s", usermap) < 0)
2774                                 goto oom;
2775                         args[ac++] = arg;
2776                 }
2777
2778                 if (groupmap) {
2779                         if (asprintf(&arg, "--groupmap=%s", groupmap) < 0)
2780                                 goto oom;
2781                         args[ac++] = arg;
2782                 }
2783
2784                 if (ignore_existing)
2785                         args[ac++] = "--ignore-existing";
2786
2787                 /* Backward compatibility: send --existing, not --ignore-non-existing. */
2788                 if (ignore_non_existing)
2789                         args[ac++] = "--existing";
2790
2791                 if (tmpdir) {
2792                         args[ac++] = "--temp-dir";
2793                         args[ac++] = tmpdir;
2794                 }
2795
2796                 if (basis_dir[0]) {
2797                         /* the server only needs this option if it is not the sender,
2798                          *   and it may be an older version that doesn't know this
2799                          *   option, so don't send it if client is the sender.
2800                          */
2801                         for (i = 0; i < basis_dir_cnt; i++) {
2802                                 args[ac++] = dest_option;
2803                                 args[ac++] = basis_dir[i];
2804                         }
2805                 }
2806         }
2807
2808         /* What flags do we need to send to the other side? */
2809         where = (am_server ? W_CLI : W_SRV) | (am_sender ? W_REC : W_SND);
2810         arg = make_output_option(info_words, info_levels, where);
2811         if (arg)
2812                 args[ac++] = arg;
2813
2814         arg = make_output_option(debug_words, debug_levels, where);
2815         if (arg)
2816                 args[ac++] = arg;
2817
2818         if (append_mode) {
2819                 if (append_mode > 1)
2820                         args[ac++] = "--append";
2821                 args[ac++] = "--append";
2822         } else if (inplace)
2823                 args[ac++] = "--inplace";
2824
2825         if (files_from && (!am_sender || filesfrom_host)) {
2826                 if (filesfrom_host) {
2827                         args[ac++] = "--files-from";
2828                         args[ac++] = files_from;
2829                         if (eol_nulls)
2830                                 args[ac++] = "--from0";
2831                 } else {
2832                         args[ac++] = "--files-from=-";
2833                         args[ac++] = "--from0";
2834                 }
2835                 if (!relative_paths)
2836                         args[ac++] = "--no-relative";
2837         }
2838         /* It's OK that this checks the upper-bound of the protocol_version. */
2839         if (relative_paths && !implied_dirs && (!am_sender || protocol_version >= 30))
2840                 args[ac++] = "--no-implied-dirs";
2841
2842         if (write_devices && am_sender)
2843                 args[ac++] = "--write-devices";
2844
2845         if (remove_source_files == 1)
2846                 args[ac++] = "--remove-source-files";
2847         else if (remove_source_files)
2848                 args[ac++] = "--remove-sent-files";
2849
2850         if (preallocate_files && am_sender)
2851                 args[ac++] = "--preallocate";
2852
2853         if (open_noatime && preserve_atimes <= 1)
2854                 args[ac++] = "--open-noatime";
2855
2856         if (ac > MAX_SERVER_ARGS) { /* Not possible... */
2857                 rprintf(FERROR, "argc overflow in server_options().\n");
2858                 exit_cleanup(RERR_MALLOC);
2859         }
2860
2861         if (do_compression > 1)
2862                 args[ac++] = "--new-compress";
2863
2864         if (remote_option_cnt) {
2865                 int j;
2866                 if (ac + remote_option_cnt > MAX_SERVER_ARGS) {
2867                         rprintf(FERROR, "too many remote options specified.\n");
2868                         exit_cleanup(RERR_SYNTAX);
2869                 }
2870                 for (j = 1; j <= remote_option_cnt; j++)
2871                         args[ac++] = (char*)remote_options[j];
2872         }
2873
2874         *argc_p = ac;
2875         return;
2876
2877     oom:
2878         out_of_memory("server_options");
2879 }
2880
2881 /* If str points to a valid hostspec, return allocated memory containing the
2882  * [USER@]HOST part of the string, and set the path_start_ptr to the part of
2883  * the string after the host part.  Otherwise, return NULL.  If port_ptr is
2884  * non-NULL, we must be parsing an rsync:// URL hostname, and we will set
2885  * *port_ptr if a port number is found.  Note that IPv6 IPs will have their
2886  * (required for parsing) [ and ] chars elided from the returned string. */
2887 static char *parse_hostspec(char *str, char **path_start_ptr, int *port_ptr)
2888 {
2889         char *s, *host_start = str;
2890         int hostlen = 0, userlen = 0;
2891         char *ret;
2892
2893         for (s = str; ; s++) {
2894                 if (!*s) {
2895                         /* It is only OK if we run out of string with rsync:// */
2896                         if (!port_ptr)
2897                                 return NULL;
2898                         if (!hostlen)
2899                                 hostlen = s - host_start;
2900                         break;
2901                 }
2902                 if (*s == ':' || *s == '/') {
2903                         if (!hostlen)
2904                                 hostlen = s - host_start;
2905                         if (*s++ == '/') {
2906                                 if (!port_ptr)
2907                                         return NULL;
2908                         } else if (port_ptr) {
2909                                 *port_ptr = atoi(s);
2910                                 while (isDigit(s)) s++;
2911                                 if (*s && *s++ != '/')
2912                                         return NULL;
2913                         }
2914                         break;
2915                 }
2916                 if (*s == '@') {
2917                         userlen = s - str + 1;
2918                         host_start = s + 1;
2919                 } else if (*s == '[') {
2920                         if (s != host_start++)
2921                                 return NULL;
2922                         while (*s && *s != ']' && *s != '/') s++; /*SHARED ITERATOR*/
2923                         hostlen = s - host_start;
2924                         if (*s != ']' || (s[1] && s[1] != '/' && s[1] != ':') || !hostlen)
2925                                 return NULL;
2926                 }
2927         }
2928
2929         *path_start_ptr = s;
2930         ret = new_array(char, userlen + hostlen + 1);
2931         if (userlen)
2932                 strlcpy(ret, str, userlen + 1);
2933         strlcpy(ret + userlen, host_start, hostlen + 1);
2934         return ret;
2935 }
2936
2937 /* Look for a HOST specification of the form "HOST:PATH", "HOST::PATH", or
2938  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
2939  * memory with the HOST.  If a daemon-accessing spec was specified, the value
2940  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
2941  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
2942  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
2943  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
2944 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
2945 {
2946         char *path;
2947
2948         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
2949                 *host_ptr = parse_hostspec(s + strlen(URL_PREFIX), &path, port_ptr);
2950                 if (*host_ptr) {
2951                         if (!*port_ptr)
2952                                 *port_ptr = -1; /* -1 indicates they want the default */
2953                         return path;
2954                 }
2955         }
2956
2957         *host_ptr = parse_hostspec(s, &path, NULL);
2958         if (!*host_ptr)
2959                 return NULL;
2960
2961         if (*path == ':') {
2962                 if (port_ptr && !*port_ptr)
2963                         *port_ptr = -1;
2964                 return path + 1;
2965         }
2966         if (port_ptr)
2967                 *port_ptr = 0;
2968
2969         return path;
2970 }