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