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 alt_dest_type = 0;
 181 int basis_dir_cnt = 0;
 182
 183 static int version_opt_cnt = 0;
 184 static int remote_option_alloc = 0;
 185 int remote_option_cnt = 0;
 186 const char **remote_options = NULL;
 187 const char *checksum_choice = NULL;
 188 const char *compress_choice = NULL;
 189
 190 int quiet = 0;
 191 int output_motd = 1;
 192 int log_before_transfer = 0;
 193 int stdout_format_has_i = 0;
 194 int stdout_format_has_o_or_i = 0;
 195 int logfile_format_has_i = 0;
 196 int logfile_format_has_o_or_i = 0;
 197 int always_checksum = 0;
 198 int list_only = 0;
 199
 200 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
 201 char *batch_name = NULL;
 202
 203 int need_unsorted_flist = 0;
 204 char *iconv_opt =
 205 #ifdef ICONV_OPTION
 206                 ICONV_OPTION;
 207 #else
 208                 NULL;
 209 #endif
 210
 211 struct chmod_mode_struct *chmod_modes = NULL;
 212
 213 static const char *debug_verbosity[] = {
 214         /*0*/ NULL,
 215         /*1*/ NULL,
 216         /*2*/ "BIND,CMD,CONNECT,DEL,DELTASUM,DUP,FILTER,FLIST,ICONV",
 217         /*3*/ "ACL,BACKUP,CONNECT2,DELTASUM2,DEL2,EXIT,FILTER2,FLIST2,FUZZY,GENR,OWN,RECV,SEND,TIME",
 218         /*4*/ "CMD2,DELTASUM3,DEL3,EXIT2,FLIST3,ICONV2,OWN2,PROTO,TIME2",
 219         /*5*/ "CHDIR,DELTASUM4,FLIST4,FUZZY2,HASH,HLINK",
 220 };
 221
 222 #define MAX_VERBOSITY ((int)(sizeof debug_verbosity / sizeof debug_verbosity[0]) - 1)
 223
 224 static const char *info_verbosity[1+MAX_VERBOSITY] = {
 225         /*0*/ NULL,
 226         /*1*/ "COPY,DEL,FLIST,MISC,NAME,STATS,SYMSAFE",
 227         /*2*/ "BACKUP,MISC2,MOUNT,NAME2,REMOVE,SKIP",
 228 };
 229
 230 #define MAX_OUT_LEVEL 4 /* The largest N allowed for any flagN word. */
 231
 232 short info_levels[COUNT_INFO], debug_levels[COUNT_DEBUG];
 233
 234 #define DEFAULT_PRIORITY 0      /* Default/implied/--verbose set values. */
 235 #define HELP_PRIORITY 1         /* The help output uses this level. */
 236 #define USER_PRIORITY 2         /* User-specified via --info or --debug */
 237 #define LIMIT_PRIORITY 3        /* Overriding priority when limiting values. */
 238
 239 #define W_CLI (1<<0)    /* client side */
 240 #define W_SRV (1<<1)    /* server side */
 241 #define W_SND (1<<2)    /* sending side */
 242 #define W_REC (1<<3)    /* receiving side */
 243
 244 struct output_struct {
 245         char *name;     /* The name of the info/debug flag. */
 246         char *help;     /* The description of the info/debug flag. */
 247         uchar namelen;  /* The length of the name string. */
 248         uchar flag;     /* The flag's value, for consistency check. */
 249         uchar where;    /* Bits indicating where the flag is used. */
 250         uchar priority; /* See *_PRIORITY defines. */
 251 };
 252
 253 #define INFO_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, INFO_##flag, where, 0 }
 254
 255 static struct output_struct info_words[COUNT_INFO+1] = {
 256         INFO_WORD(BACKUP, W_REC, "Mention files backed up"),
 257         INFO_WORD(COPY, W_REC, "Mention files copied locally on the receiving side"),
 258         INFO_WORD(DEL, W_REC, "Mention deletions on the receiving side"),
 259         INFO_WORD(FLIST, W_CLI, "Mention file-list receiving/sending (levels 1-2)"),
 260         INFO_WORD(MISC, W_SND|W_REC, "Mention miscellaneous information (levels 1-2)"),
 261         INFO_WORD(MOUNT, W_SND|W_REC, "Mention mounts that were found or skipped"),
 262         INFO_WORD(NAME, W_SND|W_REC, "Mention 1) updated file/dir names, 2) unchanged names"),
 263         INFO_WORD(PROGRESS, W_CLI, "Mention 1) per-file progress or 2) total transfer progress"),
 264         INFO_WORD(REMOVE, W_SND, "Mention files removed on the sending side"),
 265         INFO_WORD(SKIP, W_REC, "Mention files that are skipped due to options used"),
 266         INFO_WORD(STATS, W_CLI|W_SRV, "Mention statistics at end of run (levels 1-3)"),
 267         INFO_WORD(SYMSAFE, W_SND|W_REC, "Mention symlinks that are unsafe"),
 268         { NULL, "--info", 0, 0, 0, 0 }
 269 };
 270
 271 #define DEBUG_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, DEBUG_##flag, where, 0 }
 272
 273 static struct output_struct debug_words[COUNT_DEBUG+1] = {
 274         DEBUG_WORD(ACL, W_SND|W_REC, "Debug extra ACL info"),
 275         DEBUG_WORD(BACKUP, W_REC, "Debug backup actions (levels 1-2)"),
 276         DEBUG_WORD(BIND, W_CLI, "Debug socket bind actions"),
 277         DEBUG_WORD(CHDIR, W_CLI|W_SRV, "Debug when the current directory changes"),
 278         DEBUG_WORD(CONNECT, W_CLI, "Debug connection events (levels 1-2)"),
 279         DEBUG_WORD(CMD, W_CLI, "Debug commands+options that are issued (levels 1-2)"),
 280         DEBUG_WORD(DEL, W_REC, "Debug delete actions (levels 1-3)"),
 281         DEBUG_WORD(DELTASUM, W_SND|W_REC, "Debug delta-transfer checksumming (levels 1-4)"),
 282         DEBUG_WORD(DUP, W_REC, "Debug weeding of duplicate names"),
 283         DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-3)"),
 284         DEBUG_WORD(FILTER, W_SND|W_REC, "Debug filter actions (levels 1-2)"),
 285         DEBUG_WORD(FLIST, W_SND|W_REC, "Debug file-list operations (levels 1-4)"),
 286         DEBUG_WORD(FUZZY, W_REC, "Debug fuzzy scoring (levels 1-2)"),
 287         DEBUG_WORD(GENR, W_REC, "Debug generator functions"),
 288         DEBUG_WORD(HASH, W_SND|W_REC, "Debug hashtable code"),
 289         DEBUG_WORD(HLINK, W_SND|W_REC, "Debug hard-link actions (levels 1-3)"),
 290         DEBUG_WORD(ICONV, W_CLI|W_SRV, "Debug iconv character conversions (levels 1-2)"),
 291         DEBUG_WORD(IO, W_CLI|W_SRV, "Debug I/O routines (levels 1-4)"),
 292         DEBUG_WORD(NSTR, W_CLI|W_SRV, "Debug negotiation strings"),
 293         DEBUG_WORD(OWN, W_REC, "Debug ownership changes in users & groups (levels 1-2)"),
 294         DEBUG_WORD(PROTO, W_CLI|W_SRV, "Debug protocol information"),
 295         DEBUG_WORD(RECV, W_REC, "Debug receiver functions"),
 296         DEBUG_WORD(SEND, W_SND, "Debug sender functions"),
 297         DEBUG_WORD(TIME, W_REC, "Debug setting of modified times (levels 1-2)"),
 298         { NULL, "--debug", 0, 0, 0, 0 }
 299 };
 300
 301 static int verbose = 0;
 302 static int do_stats = 0;
 303 static int do_progress = 0;
 304 static int daemon_opt;   /* sets am_daemon after option error-reporting */
 305 static int omit_dir_times = 0;
 306 static int omit_link_times = 0;
 307 static int F_option_cnt = 0;
 308 static int modify_window_set;
 309 static int itemize_changes = 0;
 310 static int refused_delete, refused_archive_part, refused_compress;
 311 static int refused_partial, refused_progress, refused_delete_before;
 312 static int refused_delete_during;
 313 static int refused_inplace, refused_no_iconv;
 314 static BOOL usermap_via_chown, groupmap_via_chown;
 315 static char *outbuf_mode;
 316 static char *bwlimit_arg, *max_size_arg, *min_size_arg;
 317 static char tmp_partialdir[] = ".~tmp~";
 318
 319 /** Local address to bind.  As a character string because it's
 320  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
 321  * address, or a hostname. **/
 322 char *bind_address;
 323
 324 static void output_item_help(struct output_struct *words);
 325
 326 /* This constructs a string that represents all the options set for either
 327  * the --info or --debug setting, skipping any implied options (by -v, etc.).
 328  * This is used both when conveying the user's options to the server, and
 329  * when the help output wants to tell the user what options are implied. */
 330 static char *make_output_option(struct output_struct *words, short *levels, uchar where)
 331 {
 332         char *str = words == info_words ? "--info=" : "--debug=";
 333         int j, counts[MAX_OUT_LEVEL+1], pos, skipped = 0, len = 0, max = 0, lev = 0;
 334         int word_count = words == info_words ? COUNT_INFO : COUNT_DEBUG;
 335         char *buf;
 336
 337         memset(counts, 0, sizeof counts);
 338
 339         for (j = 0; words[j].name; j++) {
 340                 if (words[j].flag != j) {
 341                         rprintf(FERROR, "rsync: internal error on %s%s: %d != %d\n",
 342                                 words == info_words ? "INFO_" : "DEBUG_",
 343                                 words[j].name, words[j].flag, j);
 344                         exit_cleanup(RERR_UNSUPPORTED);
 345                 }
 346                 if (!(words[j].where & where))
 347                         continue;
 348                 if (words[j].priority == DEFAULT_PRIORITY) {
 349                         /* Implied items don't need to be mentioned. */
 350                         skipped++;
 351                         continue;
 352                 }
 353                 len += len ? 1 : strlen(str);
 354                 len += strlen(words[j].name);
 355                 len += levels[j] == 1 ? 0 : 1;
 356
 357                 if (words[j].priority == HELP_PRIORITY)
 358                         continue; /* no abbreviating for help */
 359
 360                 assert(levels[j] <= MAX_OUT_LEVEL);
 361                 if (++counts[levels[j]] > max) {
 362                         /* Determine which level has the most items. */
 363                         lev = levels[j];
 364                         max = counts[lev];
 365                 }
 366         }
 367
 368         /* Sanity check the COUNT_* define against the length of the table. */
 369         if (j != word_count) {
 370                 rprintf(FERROR, "rsync: internal error: %s is wrong! (%d != %d)\n",
 371                         words == info_words ? "COUNT_INFO" : "COUNT_DEBUG",
 372                         j, word_count);
 373                 exit_cleanup(RERR_UNSUPPORTED);
 374         }
 375
 376         if (!len)
 377                 return NULL;
 378
 379         len++;
 380         if (!(buf = new_array(char, len)))
 381                 out_of_memory("make_output_option");
 382         pos = 0;
 383
 384         if (skipped || max < 5)
 385                 lev = -1;
 386         else {
 387                 if (lev == 0)
 388                         pos += snprintf(buf, len, "%sNONE", str);
 389                 else if (lev == 1)
 390                         pos += snprintf(buf, len, "%sALL", str);
 391                 else
 392                         pos += snprintf(buf, len, "%sALL%d", str, lev);
 393         }
 394
 395         for (j = 0; words[j].name && pos < len; j++) {
 396                 if (words[j].priority == DEFAULT_PRIORITY || levels[j] == lev || !(words[j].where & where))
 397                         continue;
 398                 if (pos)
 399                         buf[pos++] = ',';
 400                 else
 401                         pos += strlcpy(buf+pos, str, len-pos);
 402                 if (pos < len)
 403                         pos += strlcpy(buf+pos, words[j].name, len-pos);
 404                 /* Level 1 is implied by the name alone. */
 405                 if (levels[j] != 1 && pos < len)
 406                         buf[pos++] = '0' + levels[j];
 407         }
 408
 409         buf[pos] = '\0';
 410
 411         return buf;
 412 }
 413
 414 static void parse_output_words(struct output_struct *words, short *levels, const char *str, uchar priority)
 415 {
 416         const char *s;
 417         int j, len, lev;
 418
 419         for ( ; str; str = s) {
 420                 if ((s = strchr(str, ',')) != NULL)
 421                         len = s++ - str;
 422                 else
 423                         len = strlen(str);
 424                 if (!len)
 425                         continue;
 426                 if (!isDigit(str)) {
 427                         while (len && isDigit(str+len-1))
 428                                 len--;
 429                 }
 430                 lev = isDigit(str+len) ? atoi(str+len) : 1;
 431                 if (lev > MAX_OUT_LEVEL)
 432                         lev = MAX_OUT_LEVEL;
 433                 if (len == 4 && strncasecmp(str, "help", 4) == 0) {
 434                         output_item_help(words);
 435                         exit_cleanup(0);
 436                 }
 437                 if (len == 4 && strncasecmp(str, "none", 4) == 0)
 438                         len = lev = 0;
 439                 else if (len == 3 && strncasecmp(str, "all", 3) == 0)
 440                         len = 0;
 441                 for (j = 0; words[j].name; j++) {
 442                         if (!len
 443                          || (len == words[j].namelen && strncasecmp(str, words[j].name, len) == 0)) {
 444                                 if (priority >= words[j].priority) {
 445                                         words[j].priority = priority;
 446                                         levels[j] = lev;
 447                                 }
 448                                 if (len)
 449                                         break;
 450                         }
 451                 }
 452                 if (len && !words[j].name && !am_server) {
 453                         rprintf(FERROR, "Unknown %s item: \"%.*s\"\n",
 454                                 words[j].help, len, str);
 455                         exit_cleanup(RERR_SYNTAX);
 456                 }
 457         }
 458 }
 459
 460 /* Tell the user what all the info or debug flags mean. */
 461 static void output_item_help(struct output_struct *words)
 462 {
 463         short *levels = words == info_words ? info_levels : debug_levels;
 464         const char **verbosity = words == info_words ? info_verbosity : debug_verbosity;
 465         char buf[128], *opt, *fmt = "%-10s %s\n";
 466         int j;
 467
 468         reset_output_levels();
 469
 470         rprintf(FINFO, "Use OPT or OPT1 for level 1 output, OPT2 for level 2, etc.; OPT0 silences.\n");
 471         rprintf(FINFO, "\n");
 472         for (j = 0; words[j].name; j++)
 473                 rprintf(FINFO, fmt, words[j].name, words[j].help);
 474         rprintf(FINFO, "\n");
 475
 476         snprintf(buf, sizeof buf, "Set all %s options (e.g. all%d)",
 477                  words[j].help, MAX_OUT_LEVEL);
 478         rprintf(FINFO, fmt, "ALL", buf);
 479
 480         snprintf(buf, sizeof buf, "Silence all %s options (same as all0)",
 481                  words[j].help);
 482         rprintf(FINFO, fmt, "NONE", buf);
 483
 484         rprintf(FINFO, fmt, "HELP", "Output this help message");
 485         rprintf(FINFO, "\n");
 486         rprintf(FINFO, "Options added for each increase in verbose level:\n");
 487
 488         for (j = 1; j <= MAX_VERBOSITY; j++) {
 489                 parse_output_words(words, levels, verbosity[j], HELP_PRIORITY);
 490                 opt = make_output_option(words, levels, W_CLI|W_SRV|W_SND|W_REC);
 491                 if (opt) {
 492                         rprintf(FINFO, "%d) %s\n", j, strchr(opt, '=')+1);
 493                         free(opt);
 494                 }
 495                 reset_output_levels();
 496         }
 497 }
 498
 499 /* The --verbose option now sets info+debug flags. */
 500 static void set_output_verbosity(int level, uchar priority)
 501 {
 502         int j;
 503
 504         if (level > MAX_VERBOSITY)
 505                 level = MAX_VERBOSITY;
 506
 507         for (j = 1; j <= level; j++) {
 508                 parse_output_words(info_words, info_levels, info_verbosity[j], priority);
 509                 parse_output_words(debug_words, debug_levels, debug_verbosity[j], priority);
 510         }
 511 }
 512
 513 /* Limit the info+debug flag levels given a verbose-option level limit. */
 514 void limit_output_verbosity(int level)
 515 {
 516         short info_limits[COUNT_INFO], debug_limits[COUNT_DEBUG];
 517         int j;
 518
 519         if (level > MAX_VERBOSITY)
 520                 return;
 521
 522         memset(info_limits, 0, sizeof info_limits);
 523         memset(debug_limits, 0, sizeof debug_limits);
 524
 525         /* Compute the level limits in the above arrays. */
 526         for (j = 1; j <= level; j++) {
 527                 parse_output_words(info_words, info_limits, info_verbosity[j], LIMIT_PRIORITY);
 528                 parse_output_words(debug_words, debug_limits, debug_verbosity[j], LIMIT_PRIORITY);
 529         }
 530
 531         for (j = 0; j < COUNT_INFO; j++) {
 532                 if (info_levels[j] > info_limits[j])
 533                         info_levels[j] = info_limits[j];
 534         }
 535
 536         for (j = 0; j < COUNT_DEBUG; j++) {
 537                 if (debug_levels[j] > debug_limits[j])
 538                         debug_levels[j] = debug_limits[j];
 539         }
 540 }
 541
 542 void reset_output_levels(void)
 543 {
 544         int j;
 545
 546         memset(info_levels, 0, sizeof info_levels);
 547         memset(debug_levels, 0, sizeof debug_levels);
 548
 549         for (j = 0; j < COUNT_INFO; j++)
 550                 info_words[j].priority = DEFAULT_PRIORITY;
 551
 552         for (j = 0; j < COUNT_DEBUG; j++)
 553                 debug_words[j].priority = DEFAULT_PRIORITY;
 554 }
 555
 556 void negate_output_levels(void)
 557 {
 558         int j;
 559
 560         for (j = 0; j < COUNT_INFO; j++)
 561                 info_levels[j] *= -1;
 562
 563         for (j = 0; j < COUNT_DEBUG; j++)
 564                 debug_levels[j] *= -1;
 565 }
 566
 567 static char *istring(const char *fmt, int val)
 568 {
 569         char *str;
 570         if (asprintf(&str, fmt, val) < 0)
 571                 out_of_memory("istring");
 572         return str;
 573 }
 574
 575 static void print_capabilities(enum logcode f)
 576 {
 577         STRUCT_STAT *dumstat;
 578         char line_buf[75];
 579         int line_len, j;
 580         char *capabilities[] = {
 581                 istring("%d-bit files", (int)(sizeof (OFF_T) * 8)),
 582                 istring("%d-bit inums", (int)(sizeof dumstat->st_ino * 8)), /* Don't check ino_t! */
 583                 istring("%d-bit timestamps", (int)(sizeof (time_t) * 8)),
 584                 istring("%d-bit long ints", (int)(sizeof (int64) * 8)),
 585
 586 #ifndef HAVE_SOCKETPAIR
 587                 "no "
 588 #endif
 589                         "socketpairs",
 590
 591 #ifndef SUPPORT_HARD_LINKS
 592                 "no "
 593 #endif
 594                         "hardlinks",
 595
 596 #ifndef SUPPORT_LINKS
 597                 "no "
 598 #endif
 599                         "symlinks",
 600
 601 #ifndef INET6
 602                 "no "
 603 #endif
 604                         "IPv6",
 605
 606                 "atimes",
 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 #ifdef RSYNC_USE_PROTECTED_ARGS
 631                 "default "
 632 #else
 633                 "optional "
 634 #endif
 635                         "protected-args",
 636
 637 #ifndef ICONV_OPTION
 638                 "no "
 639 #endif
 640                         "iconv",
 641
 642 #ifndef CAN_SET_SYMLINK_TIMES
 643                 "no "
 644 #endif
 645                         "symtimes",
 646
 647 #ifndef SUPPORT_PREALLOCATION
 648                 "no "
 649 #endif
 650                         "prealloc",
 651
 652         "*" /* All options after this point are hidden w/o -V -V */
 653 #ifndef HAVE_SIMD
 654                 "no "
 655 #endif
 656                         "SIMD",
 657
 658 #ifndef HAVE_ASM
 659                 "no "
 660 #endif
 661                         "asm",
 662
 663 #ifndef USE_OPENSSL
 664                 "no "
 665 #endif
 666                         "openssl-crypto",
 667
 668                 NULL
 669         };
 670
 671         for (line_len = 0, j = 0; ; j++) {
 672                 char *cap = capabilities[j];
 673                 if (!cap)
 674                         break;
 675                 if (*cap == '*') {
 676                         if (version_opt_cnt >= 2)
 677                                 capabilities[j]++;
 678                         else
 679                                 capabilities[j] = NULL;
 680                         break;
 681                 }
 682         }
 683
 684         for (line_len = 0, j = 0; ; j++) {
 685                 char *cap = capabilities[j];
 686                 int cap_len = cap ? strlen(cap) : 1000;
 687                 int need_comma = cap && capabilities[j+1] != NULL ? 1 : 0;
 688                 if (line_len + 1 + cap_len + need_comma >= (int)sizeof line_buf) {
 689                         rprintf(f, "   %s\n", line_buf);
 690                         line_len = 0;
 691                 }
 692                 if (!cap)
 693                         break;
 694                 line_len += snprintf(line_buf+line_len, sizeof line_buf - line_len, " %s%s", cap, need_comma ? "," : "");
 695         }
 696 }
 697
 698 static void print_rsync_version(enum logcode f)
 699 {
 700         char tmpbuf[256], *subprotocol = "";
 701
 702 #if SUBPROTOCOL_VERSION != 0
 703         subprotocol = istring(".PR%d", SUBPROTOCOL_VERSION);
 704 #endif
 705         rprintf(f, "%s  version %s  protocol version %d%s\n",
 706                 RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION, subprotocol);
 707
 708         rprintf(f, "Copyright (C) 1996-" LATEST_YEAR " by Andrew Tridgell, Wayne Davison, and others.\n");
 709         rprintf(f, "Web site: http://rsync.samba.org/\n");
 710
 711         rprintf(f, "Capabilities:\n");
 712         print_capabilities(f);
 713
 714         rprintf(f, "Checksum list:\n");
 715         get_default_nno_list(&valid_checksums, tmpbuf, sizeof tmpbuf, '(');
 716         rprintf(f, "    %s\n", tmpbuf);
 717
 718         rprintf(f, "Compress list:\n");
 719         get_default_nno_list(&valid_compressions, tmpbuf, sizeof tmpbuf, '(');
 720         rprintf(f, "    %s\n", tmpbuf);
 721
 722 #ifdef MAINTAINER_MODE
 723         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
 724 #endif
 725
 726 #if SIZEOF_INT64 < 8
 727         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
 728 #endif
 729         if (sizeof (int64) != SIZEOF_INT64) {
 730                 rprintf(f,
 731                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
 732                         (int) SIZEOF_INT64, (int) sizeof (int64));
 733         }
 734
 735         rprintf(f,"\n");
 736         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
 737         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
 738         rprintf(f,"General Public Licence for details.\n");
 739 }
 740
 741
 742 void usage(enum logcode F)
 743 {
 744   print_rsync_version(F);
 745
 746   rprintf(F,"\n");
 747   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
 748   rprintf(F,"via a fast differencing algorithm.\n");
 749
 750   rprintf(F,"\n");
 751   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
 752   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
 753   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
 754   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
 755   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
 756   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
 757   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
 758   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
 759   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
 760   rprintf(F,"\n");
 761   rprintf(F,"Options\n");
 762 #include "help-rsync.h"
 763   rprintf(F,"\n");
 764   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
 765   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
 766   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
 767 }
 768
 769 enum {OPT_SERVER = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
 770       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
 771       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
 772       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
 773       OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, OPT_INFO, OPT_DEBUG,
 774       OPT_USERMAP, OPT_GROUPMAP, OPT_CHOWN, OPT_BWLIMIT,
 775       OPT_OLD_COMPRESS, OPT_NEW_COMPRESS, OPT_NO_COMPRESS,
 776       OPT_REFUSED_BASE = 9000};
 777
 778 static struct poptOption long_options[] = {
 779   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 780   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
 781   {"version",         'V', POPT_ARG_NONE,   0, 'V', 0, 0},
 782   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
 783   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 784   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 785   {"info",             0,  POPT_ARG_STRING, 0, OPT_INFO, 0, 0 },
 786   {"debug",            0,  POPT_ARG_STRING, 0, OPT_DEBUG, 0, 0 },
 787   {"msgs2stderr",      0,  POPT_ARG_NONE,   &msgs2stderr, 0, 0, 0 },
 788   {"no-msgs2stderr",   0,  POPT_ARG_VAL,    &msgs2stderr, 0, 0, 0 },
 789   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
 790   {"motd",             0,  POPT_ARG_VAL,    &output_motd, 1, 0, 0 },
 791   {"no-motd",          0,  POPT_ARG_VAL,    &output_motd, 0, 0, 0 },
 792   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
 793   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
 794   {"no-human-readable",0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 795   {"no-h",             0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 796   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
 797   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
 798   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
 799   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 800   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 801   {"inc-recursive",    0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 802   {"no-inc-recursive", 0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 803   {"i-r",              0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 804   {"no-i-r",           0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 805   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
 806   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 807   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 808   {"old-dirs",         0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 809   {"old-d",            0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 810   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
 811   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 812   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 813   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
 814   {"acls",            'A', POPT_ARG_NONE,   0, 'A', 0, 0 },
 815   {"no-acls",          0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 816   {"no-A",             0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 817   {"xattrs",          'X', POPT_ARG_NONE,   0, 'X', 0, 0 },
 818   {"no-xattrs",        0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 819   {"no-X",             0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 820   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
 821   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 822   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 823   {"atimes",          'U', POPT_ARG_NONE,   0, 'U', 0, 0 },
 824   {"no-atimes",        0,  POPT_ARG_VAL,    &preserve_atimes, 0, 0, 0 },
 825   {"no-U",             0,  POPT_ARG_VAL,    &preserve_atimes, 0, 0, 0 },
 826   {"open-noatime",     0,  POPT_ARG_VAL,    &open_noatime, 1, 0, 0 },
 827   {"no-open-noatime",  0,  POPT_ARG_VAL,    &open_noatime, 0, 0, 0 },
 828   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 1, 0, 0 },
 829   {"no-omit-dir-times",0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 830   {"no-O",             0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 831   {"omit-link-times", 'J', POPT_ARG_VAL,    &omit_link_times, 1, 0, 0 },
 832   {"no-omit-link-times",0, POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 833   {"no-J",             0,  POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 834   {"modify-window",   '@', POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
 835   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
 836   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
 837   {"fake-super",       0,  POPT_ARG_VAL,    &am_root, -1, 0, 0 },
 838   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
 839   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 840   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 841   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
 842   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 843   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 844   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
 845   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
 846   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
 847   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
 848   {"write-devices",    0,  POPT_ARG_VAL,    &write_devices, 1, 0, 0 },
 849   {"no-write-devices", 0,  POPT_ARG_VAL,    &write_devices, 0, 0, 0 },
 850   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
 851   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
 852   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
 853   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 854   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 855   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
 856   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
 857   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
 858   {"munge-links",      0,  POPT_ARG_VAL,    &munge_symlinks, 1, 0, 0 },
 859   {"no-munge-links",   0,  POPT_ARG_VAL,    &munge_symlinks, 0, 0, 0 },
 860   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
 861   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
 862   {"hard-links",      'H', POPT_ARG_NONE,   0, 'H', 0, 0 },
 863   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 864   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 865   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
 866   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 867   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 868   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 869   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 870   {"i-d",              0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 871   {"no-i-d",           0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 872   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
 873   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
 874   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
 875   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
 876   {"no-one-file-system",0, POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 877   {"no-x",             0,  POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 878   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
 879   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 880   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 881   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
 882   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
 883   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
 884   {"sparse",          'S', POPT_ARG_VAL,    &sparse_files, 1, 0, 0 },
 885   {"no-sparse",        0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 886   {"no-S",             0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 887   {"preallocate",      0,  POPT_ARG_NONE,   &preallocate_files, 0, 0, 0},
 888   {"inplace",          0,  POPT_ARG_VAL,    &inplace, 1, 0, 0 },
 889   {"no-inplace",       0,  POPT_ARG_VAL,    &inplace, 0, 0, 0 },
 890   {"append",           0,  POPT_ARG_NONE,   0, OPT_APPEND, 0, 0 },
 891   {"append-verify",    0,  POPT_ARG_VAL,    &append_mode, 2, 0, 0 },
 892   {"no-append",        0,  POPT_ARG_VAL,    &append_mode, 0, 0, 0 },
 893   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
 894   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
 895   {"delete-before",    0,  POPT_ARG_NONE,   &delete_before, 0, 0, 0 },
 896   {"delete-during",    0,  POPT_ARG_VAL,    &delete_during, 1, 0, 0 },
 897   {"delete-delay",     0,  POPT_ARG_VAL,    &delete_during, 2, 0, 0 },
 898   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
 899   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
 900   {"delete-missing-args",0,POPT_BIT_SET,    &missing_args, 2, 0, 0 },
 901   {"ignore-missing-args",0,POPT_BIT_SET,    &missing_args, 1, 0, 0 },
 902   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_source_files, 2, 0, 0 }, /* deprecated */
 903   {"remove-source-files",0,POPT_ARG_VAL,    &remove_source_files, 1, 0, 0 },
 904   {"force",            0,  POPT_ARG_VAL,    &force_delete, 1, 0, 0 },
 905   {"no-force",         0,  POPT_ARG_VAL,    &force_delete, 0, 0, 0 },
 906   {"ignore-errors",    0,  POPT_ARG_VAL,    &ignore_errors, 1, 0, 0 },
 907   {"no-ignore-errors", 0,  POPT_ARG_VAL,    &ignore_errors, 0, 0, 0 },
 908   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
 909   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
 910   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
 911   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
 912   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
 913   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
 914   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
 915   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
 916   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
 917   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 918   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 919   {"checksum",        'c', POPT_ARG_VAL,    &always_checksum, 1, 0, 0 },
 920   {"no-checksum",      0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 921   {"no-c",             0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 922   {"checksum-choice",  0,  POPT_ARG_STRING, &checksum_choice, 0, 0, 0 },
 923   {"cc",               0,  POPT_ARG_STRING, &checksum_choice, 0, 0, 0 },
 924   {"block-size",      'B', POPT_ARG_LONG,   &block_size, 0, 0, 0 },
 925   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
 926   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
 927   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
 928   {"fuzzy",           'y', POPT_ARG_NONE,   0, 'y', 0, 0 },
 929   {"no-fuzzy",         0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 930   {"no-y",             0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 931   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
 932   {"old-compress",     0,  POPT_ARG_NONE,   0, OPT_OLD_COMPRESS, 0, 0 },
 933   {"new-compress",     0,  POPT_ARG_NONE,   0, OPT_NEW_COMPRESS, 0, 0 },
 934   {"no-compress",      0,  POPT_ARG_NONE,   0, OPT_NO_COMPRESS, 0, 0 },
 935   {"no-z",             0,  POPT_ARG_NONE,   0, OPT_NO_COMPRESS, 0, 0 },
 936   {"compress-choice",  0,  POPT_ARG_STRING, &compress_choice, 0, 0, 0 },
 937   {"zc",               0,  POPT_ARG_STRING, &compress_choice, 0, 0, 0 },
 938   {"skip-compress",    0,  POPT_ARG_STRING, &skip_compress, 0, 0, 0 },
 939   {"compress-level",   0,  POPT_ARG_INT,    &do_compression_level, 0, 0, 0 },
 940   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
 941   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
 942   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
 943   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
 944   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
 945   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
 946   {"delay-updates",    0,  POPT_ARG_VAL,    &delay_updates, 1, 0, 0 },
 947   {"no-delay-updates", 0,  POPT_ARG_VAL,    &delay_updates, 0, 0, 0 },
 948   {"prune-empty-dirs",'m', POPT_ARG_VAL,    &prune_empty_dirs, 1, 0, 0 },
 949   {"no-prune-empty-dirs",0,POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
 950   {"no-m",             0,  POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
 951   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
 952   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
 953   {"out-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 },
 954   {"log-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 }, /* DEPRECATED */
 955   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
 956   {"no-itemize-changes",0, POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
 957   {"no-i",             0,  POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
 958   {"bwlimit",          0,  POPT_ARG_STRING, &bwlimit_arg, OPT_BWLIMIT, 0, 0 },
 959   {"no-bwlimit",       0,  POPT_ARG_VAL,    &bwlimit, 0, 0, 0 },
 960   {"backup",          'b', POPT_ARG_VAL,    &make_backups, 1, 0, 0 },
 961   {"no-backup",        0,  POPT_ARG_VAL,    &make_backups, 0, 0, 0 },
 962   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
 963   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
 964   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
 965   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
 966   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
 967   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
 968   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
 969   {"from0",           '0', POPT_ARG_VAL,    &eol_nulls, 1, 0, 0},
 970   {"no-from0",         0,  POPT_ARG_VAL,    &eol_nulls, 0, 0, 0},
 971   {"protect-args",    's', POPT_ARG_VAL,    &protect_args, 1, 0, 0},
 972   {"no-protect-args",  0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
 973   {"no-s",             0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
 974   {"numeric-ids",      0,  POPT_ARG_VAL,    &numeric_ids, 1, 0, 0 },
 975   {"no-numeric-ids",   0,  POPT_ARG_VAL,    &numeric_ids, 0, 0, 0 },
 976   {"usermap",          0,  POPT_ARG_STRING, 0, OPT_USERMAP, 0, 0 },
 977   {"groupmap",         0,  POPT_ARG_STRING, 0, OPT_GROUPMAP, 0, 0 },
 978   {"chown",            0,  POPT_ARG_STRING, 0, OPT_CHOWN, 0, 0 },
 979   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
 980   {"no-timeout",       0,  POPT_ARG_VAL,    &io_timeout, 0, 0, 0 },
 981   {"contimeout",       0,  POPT_ARG_INT,    &connect_timeout, 0, 0, 0 },
 982   {"no-contimeout",    0,  POPT_ARG_VAL,    &connect_timeout, 0, 0, 0 },
 983   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
 984   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
 985   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
 986   {"iconv",            0,  POPT_ARG_STRING, &iconv_opt, 0, 0, 0 },
 987   {"no-iconv",         0,  POPT_ARG_NONE,   0, OPT_NO_ICONV, 0, 0 },
 988   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
 989   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
 990   {"8-bit-output",    '8', POPT_ARG_VAL,    &allow_8bit_chars, 1, 0, 0 },
 991   {"no-8-bit-output",  0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
 992   {"no-8",             0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
 993   {"qsort",            0,  POPT_ARG_NONE,   &use_qsort, 0, 0, 0 },
 994   {"copy-as",          0,  POPT_ARG_STRING, &copy_as, 0, 0, 0 },
 995   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
 996   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
 997   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
 998   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
 999   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
1000   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
1001   {"outbuf",           0,  POPT_ARG_STRING, &outbuf_mode, 0, 0, 0 },
1002   {"remote-option",   'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1003   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1004   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
1005   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
1006   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
1007   /* All the following options switch us into daemon-mode option-parsing. */
1008   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1009   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1010   {"dparam",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1011   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1012   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1013   {0,0,0,0, 0, 0, 0}
1014 };
1015
1016 static void daemon_usage(enum logcode F)
1017 {
1018   print_rsync_version(F);
1019
1020   rprintf(F,"\n");
1021   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
1022 #include "help-rsyncd.h"
1023   rprintf(F,"\n");
1024   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
1025   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
1026 }
1027
1028 static struct poptOption long_daemon_options[] = {
1029   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
1030   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1031   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
1032   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
1033   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
1034   {"dparam",          'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1035   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1036   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1037   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
1038   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
1039   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
1040   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
1041   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1042   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1043   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1044   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
1045   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1046   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
1047   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1048   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1049   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
1050   {0,0,0,0, 0, 0, 0}
1051 };
1052
1053
1054 static char err_buf[200];
1055
1056
1057 /**
1058  * Store the option error message, if any, so that we can log the
1059  * connection attempt (which requires parsing the options), and then
1060  * show the error later on.
1061  **/
1062 void option_error(void)
1063 {
1064         if (!err_buf[0]) {
1065                 strlcpy(err_buf, "Error parsing options: option may "
1066                         "be supported on client but not on server?\n",
1067                         sizeof err_buf);
1068         }
1069
1070         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
1071         io_flush(MSG_FLUSH);
1072         msleep(20);
1073 }
1074
1075
1076 static void parse_one_refuse_match(int negated, const char *ref, const struct poptOption *list_end)
1077 {
1078         struct poptOption *op;
1079         char shortName[2];
1080         int is_wild = strpbrk(ref, "*?[") != NULL;
1081         int found_match = 0;
1082
1083         shortName[1] = '\0';
1084
1085         if (strcmp("a", ref) == 0 || strcmp("archive", ref) == 0) {
1086                 ref = "[ardlptgoD]";
1087                 is_wild = 1;
1088         }
1089
1090         for (op = long_options; op != list_end; op++) {
1091                 *shortName = op->shortName;
1092                 if ((op->longName && wildmatch(ref, op->longName))
1093                  || (*shortName && wildmatch(ref, shortName))) {
1094                         if (op->descrip[1] == '*')
1095                                 op->descrip = negated ? "a*" : "r*";
1096                         else if (!is_wild)
1097                                 op->descrip = negated ? "a=" : "r=";
1098                         found_match = 1;
1099                         if (!is_wild)
1100                                 break;
1101                 }
1102         }
1103
1104         if (!found_match)
1105                 rprintf(FLOG, "No match for refuse-options string \"%s\"\n", ref);
1106 }
1107
1108
1109 /**
1110  * Tweak the option table to disable all options that the rsyncd.conf
1111  * file has told us to refuse.
1112  **/
1113 static void set_refuse_options(void)
1114 {
1115         struct poptOption *op, *list_end = NULL;
1116         char *cp, *ref = lp_refuse_options(module_id);
1117         int negated;
1118
1119         if (!ref)
1120                 ref = "";
1121
1122         if (!am_daemon)
1123                 ref = "";
1124
1125         /* We abuse the descrip field in poptOption to make it easy to flag which options
1126          * are refused (since we don't use it otherwise).  Start by marking all options
1127          * as "a"ccepted with a few options also marked as non-wild. */
1128         for (op = long_options; ; op++) {
1129                 const char *longName = op->longName ? op->longName : "";
1130                 if (!op->longName && !op->shortName) {
1131                         list_end = op;
1132                         break;
1133                 }
1134                 if (!am_daemon
1135                  || op->shortName == 'e' /* Required for compatibility flags */
1136                  || op->shortName == '0' /* --from0 just modifies --files-from, so refuse that instead (or not) */
1137                  || op->shortName == 's' /* --protect-args is always OK */
1138                  || op->shortName == 'n' /* --dry-run is always OK */
1139                  || strcmp("iconv", longName) == 0
1140                  || strcmp("no-iconv", longName) == 0
1141                  || strcmp("checksum-seed", longName) == 0
1142                  || strcmp("write-devices", longName) == 0 /* disable wild-match (it gets refused below) */
1143                  || strcmp("log-format", longName) == 0 /* aka out-format (NOT log-file-format) */
1144                  || strcmp("sender", longName) == 0
1145                  || strcmp("server", longName) == 0)
1146                         op->descrip = "a="; /* exact-match only */
1147                 else
1148                         op->descrip = "a*"; /* wild-card-able */
1149         }
1150         assert(list_end != NULL);
1151
1152         if (am_daemon) { /* Refused by default, but can be accepted via a negated exact match. */
1153                 parse_one_refuse_match(0, "write-devices", list_end);
1154         }
1155
1156         while (1) {
1157                 while (*ref == ' ') ref++;
1158                 if (!*ref)
1159                         break;
1160                 if ((cp = strchr(ref, ' ')) != NULL)
1161                         *cp = '\0';
1162                 negated = *ref == '!';
1163                 if (negated && ref[1])
1164                         ref++;
1165                 parse_one_refuse_match(negated, ref, list_end);
1166                 if (!cp)
1167                         break;
1168                 *cp = ' ';
1169                 ref = cp + 1;
1170         }
1171
1172         if (am_daemon) {
1173 #ifdef ICONV_OPTION
1174                 if (!*lp_charset(module_id))
1175                         parse_one_refuse_match(0, "iconv", list_end);
1176 #endif
1177                 parse_one_refuse_match(0, "log-file*", list_end);
1178         }
1179
1180 #ifndef SUPPORT_HARD_LINKS
1181         parse_one_refuse_match(0, "link-dest", list_end);
1182 #endif
1183 #ifndef ICONV_OPTION
1184         parse_one_refuse_match(0, "iconv", list_end);
1185 #endif
1186 #ifndef HAVE_SETVBUF
1187         parse_one_refuse_match(0, "outbuf", list_end);
1188 #endif
1189
1190         /* Now we use the descrip values to actually mark the options for refusal. */
1191         for (op = long_options; op != list_end; op++) {
1192                 int refused = op->descrip[0] == 'r';
1193                 op->descrip = NULL;
1194                 if (!refused)
1195                         continue;
1196                 if (op->argInfo == POPT_ARG_VAL)
1197                         op->argInfo = POPT_ARG_NONE;
1198                 op->val = (op - long_options) + OPT_REFUSED_BASE;
1199                 /* The following flags are set to let us easily check an implied option later in the code. */
1200                 switch (op->shortName) {
1201                 case 'r': case 'd': case 'l': case 'p':
1202                 case 't': case 'g': case 'o': case 'D':
1203                         refused_archive_part = op->val;
1204                         break;
1205                 case 'z':
1206                         refused_compress = op->val;
1207                         break;
1208                 case '\0':
1209                         if (strcmp("delete", op->longName) == 0)
1210                                 refused_delete = op->val;
1211                         else if (strcmp("delete-before", op->longName) == 0)
1212                                 refused_delete_before = op->val;
1213                         else if (strcmp("delete-during", op->longName) == 0)
1214                                 refused_delete_during = op->val;
1215                         else if (strcmp("partial", op->longName) == 0)
1216                                 refused_partial = op->val;
1217                         else if (strcmp("progress", op->longName) == 0)
1218                                 refused_progress = op->val;
1219                         else if (strcmp("inplace", op->longName) == 0)
1220                                 refused_inplace = op->val;
1221                         else if (strcmp("no-iconv", op->longName) == 0)
1222                                 refused_no_iconv = op->val;
1223                         break;
1224                 }
1225         }
1226 }
1227
1228
1229 static int count_args(const char **argv)
1230 {
1231         int i = 0;
1232
1233         if (argv) {
1234                 while (argv[i] != NULL)
1235                         i++;
1236         }
1237
1238         return i;
1239 }
1240
1241
1242 static OFF_T parse_size_arg(char **size_arg, char def_suf)
1243 {
1244         int reps, mult, make_compatible = 0;
1245         const char *arg;
1246         OFF_T size = 1;
1247
1248         for (arg = *size_arg; isDigit(arg); arg++) {}
1249         if (*arg == '.')
1250                 for (arg++; isDigit(arg); arg++) {}
1251         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
1252         case 'b': case 'B':
1253                 reps = 0;
1254                 break;
1255         case 'k': case 'K':
1256                 reps = 1;
1257                 break;
1258         case 'm': case 'M':
1259                 reps = 2;
1260                 break;
1261         case 'g': case 'G':
1262                 reps = 3;
1263                 break;
1264         default:
1265                 return -1;
1266         }
1267         if (*arg == 'b' || *arg == 'B')
1268                 mult = 1000, make_compatible = 1, arg++;
1269         else if (!*arg || *arg == '+' || *arg == '-')
1270                 mult = 1024;
1271         else if (strncasecmp(arg, "ib", 2) == 0)
1272                 mult = 1024, arg += 2;
1273         else
1274                 return -1;
1275         while (reps--)
1276                 size *= mult;
1277         size *= atof(*size_arg);
1278         if ((*arg == '+' || *arg == '-') && arg[1] == '1')
1279                 size += atoi(arg), make_compatible = 1, arg += 2;
1280         if (*arg)
1281                 return -1;
1282         if (size > 0 && make_compatible && def_suf == 'b') {
1283                 /* We convert this manually because we may need %lld precision,
1284                  * and that's not a portable sprintf() escape. */
1285                 char buf[128], *s = buf + sizeof buf - 1;
1286                 OFF_T num = size;
1287                 *s = '\0';
1288                 while (num) {
1289                         *--s = (char)(num % 10) + '0';
1290                         num /= 10;
1291                 }
1292                 if (!(*size_arg = strdup(s)))
1293                         out_of_memory("parse_size_arg");
1294         }
1295         return size;
1296 }
1297
1298
1299 static void create_refuse_error(int which)
1300 {
1301         const char *msg;
1302         if (am_daemon)
1303                 msg = "The server is configured to refuse";
1304         else if (am_server)
1305                 msg = "The server does not support";
1306         else
1307                 msg = "This rsync does not support";
1308
1309         /* The "which" value is the index + OPT_REFUSED_BASE. */
1310         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
1311         int n = snprintf(err_buf, sizeof err_buf, "%s --%s\n", msg, op->longName) - 1;
1312         if (op->shortName)
1313                 snprintf(err_buf + n, sizeof err_buf - n, " (-%c)\n", op->shortName);
1314 }
1315
1316 /* This is used to make sure that --daemon & --server cannot be aliased to
1317  * something else. These options have always disabled popt aliases for the
1318  * parsing of a daemon or server command-line, but we have to make sure that
1319  * these options cannot vanish so that the alias disabling can take effect. */
1320 static void popt_unalias(poptContext con, const char *opt)
1321 {
1322         struct poptAlias unalias;
1323
1324         memset(&unalias, 0, sizeof unalias);
1325
1326         unalias.longName = opt + 2; /* point past the leading "--" */
1327         unalias.argc = 1;
1328         unalias.argv = new_array0(const char*, 2);
1329         unalias.argv[0] = strdup(opt);
1330
1331         poptAddAlias(con, unalias, 0);
1332 }
1333
1334 char *alt_dest_opt(int type)
1335 {
1336         if (!type)
1337                 type = alt_dest_type;
1338
1339         switch (type) {
1340         case COMPARE_DEST:
1341                 return "--compare-dest";
1342         case COPY_DEST:
1343                 return "--copy-dest";
1344         case LINK_DEST:
1345                 return "--link-dest";
1346         default:
1347                 assert(0);
1348         }
1349 }
1350
1351 /**
1352  * Process command line arguments.  Called on both local and remote.
1353  *
1354  * @retval 1 if all options are OK; with globals set to appropriate
1355  * values
1356  *
1357  * @retval 0 on error, with err_buf containing an explanation
1358  **/
1359 int parse_arguments(int *argc_p, const char ***argv_p)
1360 {
1361         static poptContext pc;
1362         const char *arg, **argv = *argv_p;
1363         int argc = *argc_p;
1364         int opt, want_dest_type;
1365         int orig_protect_args = protect_args;
1366
1367         if (argc == 0) {
1368                 strlcpy(err_buf, "argc is zero!\n", sizeof err_buf);
1369                 return 0;
1370         }
1371
1372         set_refuse_options();
1373
1374 #ifdef ICONV_OPTION
1375         if (!am_daemon && protect_args <= 0 && (arg = getenv("RSYNC_ICONV")) != NULL && *arg)
1376                 iconv_opt = strdup(arg);
1377 #endif
1378
1379         /* TODO: Call poptReadDefaultConfig; handle errors. */
1380
1381         /* The context leaks in case of an error, but if there's a
1382          * problem we always exit anyhow. */
1383         if (pc)
1384                 poptFreeContext(pc);
1385         pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1386         if (!am_server) {
1387                 poptReadDefaultConfig(pc, 0);
1388                 popt_unalias(pc, "--daemon");
1389                 popt_unalias(pc, "--server");
1390         }
1391
1392         while ((opt = poptGetNextOpt(pc)) != -1) {
1393                 /* most options are handled automatically by popt;
1394                  * only special cases are returned and listed here. */
1395
1396                 switch (opt) {
1397                 case 'V':
1398                         version_opt_cnt++;
1399                         break;
1400
1401                 case OPT_SERVER:
1402                         if (!am_server) {
1403                                 /* Disable popt aliases on the server side and
1404                                  * then start parsing the options again. */
1405                                 poptFreeContext(pc);
1406                                 pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1407                                 am_server = 1;
1408                         }
1409 #ifdef ICONV_OPTION
1410                         iconv_opt = NULL;
1411 #endif
1412                         break;
1413
1414                 case OPT_SENDER:
1415                         if (!am_server) {
1416                                 usage(FERROR);
1417                                 exit_cleanup(RERR_SYNTAX);
1418                         }
1419                         am_sender = 1;
1420                         break;
1421
1422                 case OPT_DAEMON:
1423                         if (am_daemon) {
1424                                 strlcpy(err_buf,
1425                                         "Attempt to hack rsync thwarted!\n",
1426                                         sizeof err_buf);
1427                                 return 0;
1428                         }
1429 #ifdef ICONV_OPTION
1430                         iconv_opt = NULL;
1431 #endif
1432                         protect_args = 0;
1433                         poptFreeContext(pc);
1434                         pc = poptGetContext(RSYNC_NAME, argc, argv, long_daemon_options, 0);
1435                         while ((opt = poptGetNextOpt(pc)) != -1) {
1436                                 char **cpp;
1437                                 switch (opt) {
1438                                 case 'h':
1439                                         daemon_usage(FINFO);
1440                                         exit_cleanup(0);
1441
1442                                 case 'M':
1443                                         arg = poptGetOptArg(pc);
1444                                         if (!strchr(arg, '=')) {
1445                                                 rprintf(FERROR,
1446                                                         "--dparam value is missing an '=': %s\n",
1447                                                         arg);
1448                                                 goto daemon_error;
1449                                         }
1450                                         cpp = EXPAND_ITEM_LIST(&dparam_list, char *, 4);
1451                                         *cpp = strdup(arg);
1452                                         break;
1453
1454                                 case 'v':
1455                                         verbose++;
1456                                         break;
1457
1458                                 default:
1459                                         rprintf(FERROR,
1460                                                 "rsync: %s: %s (in daemon mode)\n",
1461                                                 poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1462                                                 poptStrerror(opt));
1463                                         goto daemon_error;
1464                                 }
1465                         }
1466
1467                         if (dparam_list.count && !set_dparams(1))
1468                                 exit_cleanup(RERR_SYNTAX);
1469
1470                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1471                                 snprintf(err_buf, sizeof err_buf,
1472                                          "the --temp-dir path is WAY too long.\n");
1473                                 return 0;
1474                         }
1475
1476                         if (!daemon_opt) {
1477                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
1478                             daemon_error:
1479                                 rprintf(FERROR, "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
1480                                 exit_cleanup(RERR_SYNTAX);
1481                         }
1482
1483                         *argv_p = argv = poptGetArgs(pc);
1484                         *argc_p = argc = count_args(argv);
1485                         am_starting_up = 0;
1486                         daemon_opt = 0;
1487                         am_daemon = 1;
1488                         return 1;
1489
1490                 case OPT_MODIFY_WINDOW:
1491                         /* The value has already been set by popt, but
1492                          * we need to remember that we're using a
1493                          * non-default setting. */
1494                         modify_window_set = 1;
1495                         break;
1496
1497                 case OPT_FILTER:
1498                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1499                                         rule_template(0), 0);
1500                         break;
1501
1502                 case OPT_EXCLUDE:
1503                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1504                                         rule_template(0), XFLG_OLD_PREFIXES);
1505                         break;
1506
1507                 case OPT_INCLUDE:
1508                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1509                                         rule_template(FILTRULE_INCLUDE), XFLG_OLD_PREFIXES);
1510                         break;
1511
1512                 case OPT_EXCLUDE_FROM:
1513                 case OPT_INCLUDE_FROM:
1514                         arg = poptGetOptArg(pc);
1515                         if (sanitize_paths)
1516                                 arg = sanitize_path(NULL, arg, NULL, 0, SP_DEFAULT);
1517                         if (daemon_filter_list.head) {
1518                                 int rej;
1519                                 char *cp = strdup(arg);
1520                                 if (!cp)
1521                                         out_of_memory("parse_arguments");
1522                                 if (!*cp)
1523                                         rej = 1;
1524                                 else {
1525                                         char *dir = cp + (*cp == '/' ? module_dirlen : 0);
1526                                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1527                                         rej = check_filter(&daemon_filter_list, FLOG, dir, 0) < 0;
1528                                 }
1529                                 free(cp);
1530                                 if (rej)
1531                                         goto options_rejected;
1532                         }
1533                         parse_filter_file(&filter_list, arg,
1534                                 rule_template(opt == OPT_INCLUDE_FROM ? FILTRULE_INCLUDE : 0),
1535                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
1536                         break;
1537
1538                 case 'a':
1539                         if (refused_archive_part) {
1540                                 create_refuse_error(refused_archive_part);
1541                                 return 0;
1542                         }
1543                         if (!recurse) /* preserve recurse == 2 */
1544                                 recurse = 1;
1545 #ifdef SUPPORT_LINKS
1546                         preserve_links = 1;
1547 #endif
1548                         preserve_perms = 1;
1549                         preserve_times = 1;
1550                         preserve_gid = 1;
1551                         preserve_uid = 1;
1552                         preserve_devices = 1;
1553                         preserve_specials = 1;
1554                         break;
1555
1556                 case 'D':
1557                         preserve_devices = preserve_specials = 1;
1558                         break;
1559
1560                 case OPT_NO_D:
1561                         preserve_devices = preserve_specials = 0;
1562                         break;
1563
1564                 case 'h':
1565                         human_readable++;
1566                         break;
1567
1568                 case 'H':
1569                         preserve_hard_links++;
1570                         break;
1571
1572                 case 'i':
1573                         itemize_changes++;
1574                         break;
1575
1576                 case 'U':
1577                         if (++preserve_atimes > 1)
1578                                 open_noatime = 1;
1579                         break;
1580
1581                 case 'v':
1582                         verbose++;
1583                         break;
1584
1585                 case 'y':
1586                         fuzzy_basis++;
1587                         break;
1588
1589                 case 'q':
1590                         quiet++;
1591                         break;
1592
1593                 case 'x':
1594                         one_file_system++;
1595                         break;
1596
1597                 case 'F':
1598                         switch (++F_option_cnt) {
1599                         case 1:
1600                                 parse_filter_str(&filter_list,": /.rsync-filter",rule_template(0),0);
1601                                 break;
1602                         case 2:
1603                                 parse_filter_str(&filter_list,"- .rsync-filter",rule_template(0),0);
1604                                 break;
1605                         }
1606                         break;
1607
1608                 case 'P':
1609                         if (refused_partial || refused_progress) {
1610                                 create_refuse_error(refused_partial ? refused_partial : refused_progress);
1611                                 return 0;
1612                         }
1613                         do_progress = 1;
1614                         keep_partial = 1;
1615                         break;
1616
1617                 case 'z':
1618                         do_compression++;
1619                         break;
1620
1621                 case OPT_OLD_COMPRESS:
1622                         compress_choice = "zlib";
1623                         break;
1624
1625                 case OPT_NEW_COMPRESS:
1626                         compress_choice = "zlibx";
1627                         break;
1628
1629                 case OPT_NO_COMPRESS:
1630                         do_compression = 0;
1631                         compress_choice = NULL;
1632                         break;
1633
1634                 case 'M':
1635                         arg = poptGetOptArg(pc);
1636                         if (*arg != '-') {
1637                                 snprintf(err_buf, sizeof err_buf,
1638                                         "Remote option must start with a dash: %s\n", arg);
1639                                 return 0;
1640                         }
1641                         if (remote_option_cnt+2 >= remote_option_alloc) {
1642                                 remote_option_alloc += 16;
1643                                 remote_options = realloc_array(remote_options,
1644                                                         const char *, remote_option_alloc);
1645                                 if (!remote_options)
1646                                         out_of_memory("parse_arguments");
1647                                 if (!remote_option_cnt)
1648                                         remote_options[0] = "ARG0";
1649                         }
1650                         remote_options[++remote_option_cnt] = arg;
1651                         remote_options[remote_option_cnt+1] = NULL;
1652                         break;
1653
1654                 case OPT_WRITE_BATCH:
1655                         /* batch_name is already set */
1656                         write_batch = 1;
1657                         break;
1658
1659                 case OPT_ONLY_WRITE_BATCH:
1660                         /* batch_name is already set */
1661                         write_batch = -1;
1662                         break;
1663
1664                 case OPT_READ_BATCH:
1665                         /* batch_name is already set */
1666                         read_batch = 1;
1667                         break;
1668
1669                 case OPT_NO_ICONV:
1670 #ifdef ICONV_OPTION
1671                         iconv_opt = NULL;
1672 #endif
1673                         break;
1674
1675                 case OPT_MAX_SIZE:
1676                         if ((max_size = parse_size_arg(&max_size_arg, 'b')) < 0) {
1677                                 snprintf(err_buf, sizeof err_buf,
1678                                         "--max-size value is invalid: %s\n",
1679                                         max_size_arg);
1680                                 return 0;
1681                         }
1682                         break;
1683
1684                 case OPT_MIN_SIZE:
1685                         if ((min_size = parse_size_arg(&min_size_arg, 'b')) < 0) {
1686                                 snprintf(err_buf, sizeof err_buf,
1687                                         "--min-size value is invalid: %s\n",
1688                                         min_size_arg);
1689                                 return 0;
1690                         }
1691                         break;
1692
1693                 case OPT_BWLIMIT:
1694                         {
1695                                 OFF_T limit = parse_size_arg(&bwlimit_arg, 'K');
1696                                 if (limit < 0) {
1697                                         snprintf(err_buf, sizeof err_buf,
1698                                                 "--bwlimit value is invalid: %s\n", bwlimit_arg);
1699                                         return 0;
1700                                 }
1701                                 bwlimit = (limit + 512) / 1024;
1702                                 if (limit && !bwlimit) {
1703                                         snprintf(err_buf, sizeof err_buf,
1704                                                 "--bwlimit value is too small: %s\n", bwlimit_arg);
1705                                         return 0;
1706                                 }
1707                         }
1708                         break;
1709
1710                 case OPT_APPEND:
1711                         if (am_server)
1712                                 append_mode++;
1713                         else
1714                                 append_mode = 1;
1715                         break;
1716
1717                 case OPT_LINK_DEST:
1718                         want_dest_type = LINK_DEST;
1719                         goto set_dest_dir;
1720
1721                 case OPT_COPY_DEST:
1722                         want_dest_type = COPY_DEST;
1723                         goto set_dest_dir;
1724
1725                 case OPT_COMPARE_DEST:
1726                         want_dest_type = COMPARE_DEST;
1727
1728                 set_dest_dir:
1729                         if (alt_dest_type && alt_dest_type != want_dest_type) {
1730                                 snprintf(err_buf, sizeof err_buf,
1731                                         "ERROR: the %s option conflicts with the %s option\n",
1732                                         alt_dest_opt(want_dest_type), alt_dest_opt(0));
1733                                 return 0;
1734                         }
1735                         alt_dest_type = want_dest_type;
1736
1737                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1738                                 snprintf(err_buf, sizeof err_buf,
1739                                         "ERROR: at most %d %s args may be specified\n",
1740                                         MAX_BASIS_DIRS, alt_dest_opt(0));
1741                                 return 0;
1742                         }
1743                         /* We defer sanitizing this arg until we know what
1744                          * our destination directory is going to be. */
1745                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1746                         break;
1747
1748                 case OPT_CHMOD:
1749                         arg = poptGetOptArg(pc);
1750                         if (!parse_chmod(arg, &chmod_modes)) {
1751                                 snprintf(err_buf, sizeof err_buf,
1752                                         "Invalid argument passed to --chmod (%s)\n",
1753                                         arg);
1754                                 return 0;
1755                         }
1756                         break;
1757
1758                 case OPT_INFO:
1759                         arg = poptGetOptArg(pc);
1760                         parse_output_words(info_words, info_levels, arg, USER_PRIORITY);
1761                         break;
1762
1763                 case OPT_DEBUG:
1764                         arg = poptGetOptArg(pc);
1765                         parse_output_words(debug_words, debug_levels, arg, USER_PRIORITY);
1766                         break;
1767
1768                 case OPT_USERMAP:
1769                         if (usermap) {
1770                                 if (usermap_via_chown) {
1771                                         snprintf(err_buf, sizeof err_buf,
1772                                                 "--usermap conflicts with prior --chown.\n");
1773                                         return 0;
1774                                 }
1775                                 snprintf(err_buf, sizeof err_buf,
1776                                         "You can only specify --usermap once.\n");
1777                                 return 0;
1778                         }
1779                         usermap = (char *)poptGetOptArg(pc);
1780                         usermap_via_chown = False;
1781                         break;
1782
1783                 case OPT_GROUPMAP:
1784                         if (groupmap) {
1785                                 if (groupmap_via_chown) {
1786                                         snprintf(err_buf, sizeof err_buf,
1787                                                 "--groupmap conflicts with prior --chown.\n");
1788                                         return 0;
1789                                 }
1790                                 snprintf(err_buf, sizeof err_buf,
1791                                         "You can only specify --groupmap once.\n");
1792                                 return 0;
1793                         }
1794                         groupmap = (char *)poptGetOptArg(pc);
1795                         groupmap_via_chown = False;
1796                         break;
1797
1798                 case OPT_CHOWN: {
1799                         const char *chown = poptGetOptArg(pc);
1800                         int len;
1801                         if ((arg = strchr(chown, ':')) != NULL)
1802                                 len = arg++ - chown;
1803                         else
1804                                 len = strlen(chown);
1805                         if (len) {
1806                                 if (usermap) {
1807                                         if (!usermap_via_chown) {
1808                                                 snprintf(err_buf, sizeof err_buf,
1809                                                         "--chown conflicts with prior --usermap.\n");
1810                                                 return 0;
1811                                         }
1812                                         snprintf(err_buf, sizeof err_buf,
1813                                                 "You can only specify a user-affecting --chown once.\n");
1814                                         return 0;
1815                                 }
1816                                 if (asprintf(&usermap, "*:%.*s", len, chown) < 0)
1817                                         out_of_memory("parse_arguments");
1818                                 usermap_via_chown = True;
1819                         }
1820                         if (arg && *arg) {
1821                                 if (groupmap) {
1822                                         if (!groupmap_via_chown) {
1823                                                 snprintf(err_buf, sizeof err_buf,
1824                                                         "--chown conflicts with prior --groupmap.\n");
1825                                                 return 0;
1826                                         }
1827                                         snprintf(err_buf, sizeof err_buf,
1828                                                 "You can only specify a group-affecting --chown once.\n");
1829                                         return 0;
1830                                 }
1831                                 if (asprintf(&groupmap, "*:%s", arg) < 0)
1832                                         out_of_memory("parse_arguments");
1833                                 groupmap_via_chown = True;
1834                         }
1835                         break;
1836                 }
1837
1838                 case OPT_HELP:
1839                         usage(FINFO);
1840                         exit_cleanup(0);
1841
1842                 case 'A':
1843 #ifdef SUPPORT_ACLS
1844                         preserve_acls = 1;
1845                         preserve_perms = 1;
1846                         break;
1847 #else
1848                         /* FIXME: this should probably be ignored with a
1849                          * warning and then countermeasures taken to
1850                          * restrict group and other access in the presence
1851                          * of any more restrictive ACLs, but this is safe
1852                          * for now */
1853                         snprintf(err_buf,sizeof(err_buf),
1854                                  "ACLs are not supported on this %s\n",
1855                                  am_server ? "server" : "client");
1856                         return 0;
1857 #endif
1858
1859                 case 'X':
1860 #ifdef SUPPORT_XATTRS
1861                         preserve_xattrs++;
1862                         break;
1863 #else
1864                         snprintf(err_buf,sizeof(err_buf),
1865                                  "extended attributes are not supported on this %s\n",
1866                                  am_server ? "server" : "client");
1867                         return 0;
1868 #endif
1869
1870                 default:
1871                         /* A large opt value means that set_refuse_options()
1872                          * turned this option off. */
1873                         if (opt >= OPT_REFUSED_BASE) {
1874                                 create_refuse_error(opt);
1875                                 return 0;
1876                         }
1877                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
1878                                  am_server ? "on remote machine: " : "",
1879                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1880                                  poptStrerror(opt));
1881                         return 0;
1882                 }
1883         }
1884
1885         if (version_opt_cnt) {
1886                 print_rsync_version(FINFO);
1887                 exit_cleanup(0);
1888         }
1889
1890         if (protect_args < 0) {
1891                 if (am_server)
1892                         protect_args = 0;
1893                 else if ((arg = getenv("RSYNC_PROTECT_ARGS")) != NULL && *arg)
1894                         protect_args = atoi(arg) ? 1 : 0;
1895                 else {
1896 #ifdef RSYNC_USE_PROTECTED_ARGS
1897                         protect_args = 1;
1898 #else
1899                         protect_args = 0;
1900 #endif
1901                 }
1902         }
1903
1904         if (checksum_choice && strcasecmp(checksum_choice, "auto") != 0 && strcasecmp(checksum_choice, "auto,auto") != 0) {
1905                 /* Call this early to verify the args and figure out if we need to force
1906                  * --whole-file. Note that the parse function will get called again later,
1907                  * just in case an "auto" choice needs to know the protocol_version. */
1908                 parse_checksum_choice(0);
1909         } else
1910                 checksum_choice = NULL;
1911
1912         if (human_readable > 1 && argc == 2 && !am_server) {
1913                 /* Allow the old meaning of 'h' (--help) on its own. */
1914                 usage(FINFO);
1915                 exit_cleanup(0);
1916         }
1917
1918         if (!compress_choice && do_compression > 1)
1919                 compress_choice = "zlibx";
1920         if (compress_choice && strcasecmp(compress_choice, "auto") != 0)
1921                 parse_compress_choice(0); /* Twiddles do_compression and can possibly NULL-out compress_choice. */
1922         else
1923                 compress_choice = NULL;
1924
1925         if (do_compression || do_compression_level != CLVL_NOT_SPECIFIED) {
1926                 if (!do_compression)
1927                         do_compression = CPRES_AUTO;
1928                 if (do_compression && refused_compress) {
1929                         create_refuse_error(refused_compress);
1930                         return 0;
1931                 }
1932         }
1933
1934 #ifdef HAVE_SETVBUF
1935         if (outbuf_mode && !am_server) {
1936                 int mode = *(uchar *)outbuf_mode;
1937                 if (islower(mode))
1938                         mode = toupper(mode);
1939                 fflush(stdout); /* Just in case... */
1940                 switch (mode) {
1941                 case 'N': /* None */
1942                 case 'U': /* Unbuffered */
1943                         mode = _IONBF;
1944                         break;
1945                 case 'L': /* Line */
1946                         mode = _IOLBF;
1947                         break;
1948                 case 'B': /* Block */
1949                 case 'F': /* Full */
1950                         mode = _IOFBF;
1951                         break;
1952                 default:
1953                         snprintf(err_buf, sizeof err_buf,
1954                                 "Invalid --outbuf setting -- specify N, L, or B.\n");
1955                         return 0;
1956                 }
1957                 setvbuf(stdout, (char *)NULL, mode, 0);
1958         }
1959
1960         if (msgs2stderr) {
1961                 /* Make stderr line buffered for better sharing of the stream. */
1962                 fflush(stderr); /* Just in case... */
1963                 setvbuf(stderr, (char *)NULL, _IOLBF, 0);
1964         }
1965 #endif
1966
1967         set_output_verbosity(verbose, DEFAULT_PRIORITY);
1968
1969         if (do_stats) {
1970                 parse_output_words(info_words, info_levels,
1971                         verbose > 1 ? "stats3" : "stats2", DEFAULT_PRIORITY);
1972         }
1973
1974 #ifdef ICONV_OPTION
1975         if (iconv_opt && protect_args != 2) {
1976                 if (!am_server && strcmp(iconv_opt, "-") == 0)
1977                         iconv_opt = NULL;
1978                 else
1979                         need_unsorted_flist = 1;
1980         }
1981         if (refused_no_iconv && !iconv_opt) {
1982                 create_refuse_error(refused_no_iconv);
1983                 return 0;
1984         }
1985 #endif
1986
1987         if (fuzzy_basis > 1)
1988                 fuzzy_basis = basis_dir_cnt + 1;
1989
1990         /* Don't let the client reset protect_args if it was already processed */
1991         if (orig_protect_args == 2 && am_server)
1992                 protect_args = orig_protect_args;
1993
1994         if (protect_args == 1 && am_server)
1995                 return 1;
1996
1997         *argv_p = argv = poptGetArgs(pc);
1998         *argc_p = argc = count_args(argv);
1999
2000 #ifndef SUPPORT_LINKS
2001         if (preserve_links && !am_sender) {
2002                 snprintf(err_buf, sizeof err_buf,
2003                          "symlinks are not supported on this %s\n",
2004                          am_server ? "server" : "client");
2005                 return 0;
2006         }
2007 #endif
2008
2009 #ifndef SUPPORT_HARD_LINKS
2010         if (preserve_hard_links) {
2011                 snprintf(err_buf, sizeof err_buf,
2012                          "hard links are not supported on this %s\n",
2013                          am_server ? "server" : "client");
2014                 return 0;
2015         }
2016 #endif
2017
2018 #ifdef SUPPORT_XATTRS
2019         if (am_root < 0 && preserve_xattrs > 1) {
2020                 snprintf(err_buf, sizeof err_buf,
2021                          "--fake-super conflicts with -XX\n");
2022                 return 0;
2023         }
2024 #else
2025         if (am_root < 0) {
2026                 snprintf(err_buf, sizeof err_buf,
2027                          "--fake-super requires an rsync with extended attributes enabled\n");
2028                 return 0;
2029         }
2030 #endif
2031
2032         if (block_size) {
2033                 /* We may not know the real protocol_version at this point if this is the client
2034                  * option parsing, but we still want to check it so that the client can specify
2035                  * a --protocol=29 option with a larger block size. */
2036                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
2037
2038                 if (block_size > max_blength) {
2039                         snprintf(err_buf, sizeof err_buf,
2040                                  "--block-size=%lu is too large (max: %u)\n", block_size, max_blength);
2041                         return 0;
2042                 }
2043         }
2044
2045         if (write_batch && read_batch) {
2046                 snprintf(err_buf, sizeof err_buf,
2047                         "--write-batch and --read-batch can not be used together\n");
2048                 return 0;
2049         }
2050         if (write_batch > 0 || read_batch) {
2051                 if (am_server) {
2052                         rprintf(FINFO,
2053                                 "ignoring --%s-batch option sent to server\n",
2054                                 write_batch ? "write" : "read");
2055                         /* We don't actually exit_cleanup(), so that we can
2056                          * still service older version clients that still send
2057                          * batch args to server. */
2058                         read_batch = write_batch = 0;
2059                         batch_name = NULL;
2060                 } else if (dry_run)
2061                         write_batch = 0;
2062         } else if (write_batch < 0 && dry_run)
2063                 write_batch = 0;
2064         if (read_batch && files_from) {
2065                 snprintf(err_buf, sizeof err_buf,
2066                         "--read-batch cannot be used with --files-from\n");
2067                 return 0;
2068         }
2069         if (read_batch && remove_source_files) {
2070                 snprintf(err_buf, sizeof err_buf,
2071                         "--read-batch cannot be used with --remove-%s-files\n",
2072                         remove_source_files == 1 ? "source" : "sent");
2073                 return 0;
2074         }
2075         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
2076                 snprintf(err_buf, sizeof err_buf,
2077                         "the batch-file name must be %d characters or less.\n",
2078                         MAX_BATCH_NAME_LEN);
2079                 return 0;
2080         }
2081
2082         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
2083                 snprintf(err_buf, sizeof err_buf,
2084                          "the --temp-dir path is WAY too long.\n");
2085                 return 0;
2086         }
2087
2088         if (max_delete < 0 && max_delete != INT_MIN) {
2089                 /* Negative numbers are treated as "no deletions". */
2090                 max_delete = 0;
2091         }
2092
2093         if (files_from) {
2094                 if (recurse == 1) /* preserve recurse == 2 */
2095                         recurse = 0;
2096                 if (xfer_dirs < 0)
2097                         xfer_dirs = 1;
2098         }
2099
2100         if (argc < 2 && !read_batch && !am_server)
2101                 list_only |= 1;
2102
2103         if (xfer_dirs >= 4) {
2104                 parse_filter_str(&filter_list, "- /*/*", rule_template(0), 0);
2105                 recurse = xfer_dirs = 1;
2106         } else if (recurse)
2107                 xfer_dirs = 1;
2108         else if (xfer_dirs < 0)
2109                 xfer_dirs = list_only ? 1 : 0;
2110
2111         if (relative_paths < 0)
2112                 relative_paths = files_from? 1 : 0;
2113         if (!relative_paths)
2114                 implied_dirs = 0;
2115
2116         if (delete_before + !!delete_during + delete_after > 1) {
2117                 snprintf(err_buf, sizeof err_buf,
2118                         "You may not combine multiple --delete-WHEN options.\n");
2119                 return 0;
2120         }
2121         if (delete_before || delete_during || delete_after)
2122                 delete_mode = 1;
2123         else if (delete_mode || delete_excluded) {
2124                 /* Only choose now between before & during if one is refused. */
2125                 if (refused_delete_before) {
2126                         if (!refused_delete_during)
2127                                 delete_during = 1;
2128                         else {
2129                                 create_refuse_error(refused_delete_before);
2130                                 return 0;
2131                         }
2132                 } else if (refused_delete_during)
2133                         delete_before = 1;
2134                 delete_mode = 1;
2135         }
2136         if (!xfer_dirs && delete_mode) {
2137                 snprintf(err_buf, sizeof err_buf,
2138                         "--delete does not work without --recursive (-r) or --dirs (-d).\n");
2139                 return 0;
2140         }
2141
2142         if (missing_args == 3) /* simplify if both options were specified */
2143                 missing_args = 2;
2144         if (refused_delete && (delete_mode || missing_args == 2)) {
2145                 create_refuse_error(refused_delete);
2146                 return 0;
2147         }
2148
2149         if (remove_source_files) {
2150                 /* We only want to infer this refusal of --remove-source-files
2151                  * via the refusal of "delete", not any of the "delete-FOO"
2152                  * options. */
2153                 if (refused_delete && am_sender) {
2154                         create_refuse_error(refused_delete);
2155                         return 0;
2156                 }
2157                 need_messages_from_generator = 1;
2158         }
2159
2160         if (munge_symlinks && !am_daemon) {
2161                 STRUCT_STAT st;
2162                 char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */
2163                 strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */
2164                 if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) {
2165                         rprintf(FERROR, "Symlink munging is unsafe when a %s directory exists.\n",
2166                                 prefix);
2167                         exit_cleanup(RERR_UNSUPPORTED);
2168                 }
2169         }
2170
2171         if (sanitize_paths) {
2172                 int i;
2173                 for (i = argc; i-- > 0; )
2174                         argv[i] = sanitize_path(NULL, argv[i], "", 0, SP_KEEP_DOT_DIRS);
2175                 if (tmpdir)
2176                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, SP_DEFAULT);
2177                 if (backup_dir)
2178                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, SP_DEFAULT);
2179         }
2180         if (daemon_filter_list.head && !am_sender) {
2181                 filter_rule_list *elp = &daemon_filter_list;
2182                 if (tmpdir) {
2183                         char *dir;
2184                         if (!*tmpdir)
2185                                 goto options_rejected;
2186                         dir = tmpdir + (*tmpdir == '/' ? module_dirlen : 0);
2187                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2188                         if (check_filter(elp, FLOG, dir, 1) < 0)
2189                                 goto options_rejected;
2190                 }
2191                 if (backup_dir) {
2192                         char *dir;
2193                         if (!*backup_dir)
2194                                 goto options_rejected;
2195                         dir = backup_dir + (*backup_dir == '/' ? module_dirlen : 0);
2196                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2197                         if (check_filter(elp, FLOG, dir, 1) < 0)
2198                                 goto options_rejected;
2199                 }
2200         }
2201
2202         if (!backup_suffix)
2203                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
2204         backup_suffix_len = strlen(backup_suffix);
2205         if (strchr(backup_suffix, '/') != NULL) {
2206                 snprintf(err_buf, sizeof err_buf,
2207                         "--suffix cannot contain slashes: %s\n",
2208                         backup_suffix);
2209                 return 0;
2210         }
2211         if (backup_dir) {
2212                 size_t len;
2213                 while (*backup_dir == '.' && backup_dir[1] == '/')
2214                         backup_dir += 2;
2215                 if (*backup_dir == '.' && backup_dir[1] == '\0')
2216                         backup_dir++;
2217                 len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
2218                 if (len > sizeof backup_dir_buf - 128) {
2219                         snprintf(err_buf, sizeof err_buf,
2220                                 "the --backup-dir path is WAY too long.\n");
2221                         return 0;
2222                 }
2223                 backup_dir_len = (int)len;
2224                 if (!backup_dir_len) {
2225                         backup_dir_len = -1;
2226                         backup_dir = NULL;
2227                 } else if (backup_dir_buf[backup_dir_len - 1] != '/') {
2228                         backup_dir_buf[backup_dir_len++] = '/';
2229                         backup_dir_buf[backup_dir_len] = '\0';
2230                 }
2231                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
2232         }
2233         if (backup_dir) {
2234                 /* No need for a suffix or a protect rule. */
2235         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
2236                 snprintf(err_buf, sizeof err_buf,
2237                         "--suffix cannot be empty %s\n", backup_dir_len < 0
2238                         ? "when --backup-dir is the same as the dest dir"
2239                         : "without a --backup-dir");
2240                 return 0;
2241         } else if (make_backups && delete_mode && !delete_excluded && !am_server) {
2242                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
2243                         "P *%s", backup_suffix);
2244                 parse_filter_str(&filter_list, backup_dir_buf, rule_template(0), 0);
2245         }
2246
2247         if (preserve_times) {
2248                 preserve_times = PRESERVE_FILE_TIMES;
2249                 if (!omit_dir_times)
2250                         preserve_times |= PRESERVE_DIR_TIMES;
2251 #ifdef CAN_SET_SYMLINK_TIMES
2252                 if (!omit_link_times)
2253                         preserve_times |= PRESERVE_LINK_TIMES;
2254 #endif
2255         }
2256
2257         if (make_backups && !backup_dir) {
2258                 omit_dir_times = 0; /* Implied, so avoid -O to sender. */
2259                 preserve_times &= ~PRESERVE_DIR_TIMES;
2260         }
2261
2262         if (stdout_format) {
2263                 if (am_server && log_format_has(stdout_format, 'I'))
2264                         stdout_format_has_i = 2;
2265                 else if (log_format_has(stdout_format, 'i'))
2266                         stdout_format_has_i = itemize_changes | 1;
2267                 if (!log_format_has(stdout_format, 'b')
2268                  && !log_format_has(stdout_format, 'c')
2269                  && !log_format_has(stdout_format, 'C'))
2270                         log_before_transfer = !am_server;
2271         } else if (itemize_changes) {
2272                 stdout_format = "%i %n%L";
2273                 stdout_format_has_i = itemize_changes;
2274                 log_before_transfer = !am_server;
2275         }
2276
2277         if (do_progress && !am_server) {
2278                 if (!log_before_transfer && INFO_EQ(NAME, 0))
2279                         parse_output_words(info_words, info_levels, "name", DEFAULT_PRIORITY);
2280                 parse_output_words(info_words, info_levels, "flist2,progress", DEFAULT_PRIORITY);
2281         }
2282
2283         if (dry_run)
2284                 do_xfers = 0;
2285
2286         set_io_timeout(io_timeout);
2287
2288         if (INFO_GTE(NAME, 1) && !stdout_format) {
2289                 stdout_format = "%n%L";
2290                 log_before_transfer = !am_server;
2291         }
2292         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
2293                 stdout_format_has_o_or_i = 1;
2294
2295         if (logfile_name && !am_daemon) {
2296                 if (!logfile_format) {
2297                         logfile_format = "%i %n%L";
2298                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
2299                 } else {
2300                         if (log_format_has(logfile_format, 'i'))
2301                                 logfile_format_has_i = 1;
2302                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
2303                                 logfile_format_has_o_or_i = 1;
2304                 }
2305                 log_init(0);
2306         } else if (!am_daemon)
2307                 logfile_format = NULL;
2308
2309         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
2310                 bwlimit = daemon_bwlimit;
2311         if (bwlimit) {
2312                 bwlimit_writemax = (size_t)bwlimit * 128;
2313                 if (bwlimit_writemax < 512)
2314                         bwlimit_writemax = 512;
2315         }
2316
2317         if (append_mode) {
2318                 if (whole_file > 0) {
2319                         snprintf(err_buf, sizeof err_buf,
2320                                  "--append cannot be used with --whole-file\n");
2321                         return 0;
2322                 }
2323                 if (refused_inplace) {
2324                         create_refuse_error(refused_inplace);
2325                         return 0;
2326                 }
2327                 inplace = 1;
2328         }
2329
2330         if (write_devices) {
2331                 if (refused_inplace) {
2332                         create_refuse_error(refused_inplace);
2333                         return 0;
2334                 }
2335                 inplace = 1;
2336         }
2337
2338         if (delay_updates && !partial_dir)
2339                 partial_dir = tmp_partialdir;
2340
2341         if (inplace) {
2342 #ifdef HAVE_FTRUNCATE
2343                 if (partial_dir) {
2344                         snprintf(err_buf, sizeof err_buf,
2345                                  "--%s cannot be used with --%s\n",
2346                                  append_mode ? "append" : "inplace",
2347                                  delay_updates ? "delay-updates" : "partial-dir");
2348                         return 0;
2349                 }
2350                 /* --inplace implies --partial for refusal purposes, but we
2351                  * clear the keep_partial flag for internal logic purposes. */
2352                 if (refused_partial) {
2353                         create_refuse_error(refused_partial);
2354                         return 0;
2355                 }
2356                 keep_partial = 0;
2357 #else
2358                 snprintf(err_buf, sizeof err_buf,
2359                          "--%s is not supported on this %s\n",
2360                          append_mode ? "append" : "inplace",
2361                          am_server ? "server" : "client");
2362                 return 0;
2363 #endif
2364         } else {
2365                 if (keep_partial && !partial_dir && !am_server) {
2366                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
2367                                 partial_dir = strdup(arg);
2368                 }
2369                 if (partial_dir) {
2370                         if (*partial_dir)
2371                                 clean_fname(partial_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2372                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
2373                                 partial_dir = NULL;
2374                         if (!partial_dir && refused_partial) {
2375                                 create_refuse_error(refused_partial);
2376                                 return 0;
2377                         }
2378                         keep_partial = 1;
2379                 }
2380         }
2381
2382         if (files_from) {
2383                 char *h, *p;
2384                 int q;
2385                 if (argc > 2 || (!am_daemon && !am_server && argc == 1)) {
2386                         usage(FERROR);
2387                         exit_cleanup(RERR_SYNTAX);
2388                 }
2389                 if (strcmp(files_from, "-") == 0) {
2390                         filesfrom_fd = 0;
2391                         if (am_server)
2392                                 filesfrom_host = ""; /* reading from socket */
2393                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
2394                         if (am_server) {
2395                                 snprintf(err_buf, sizeof err_buf,
2396                                         "The --files-from sent to the server cannot specify a host.\n");
2397                                 return 0;
2398                         }
2399                         files_from = p;
2400                         filesfrom_host = h;
2401                         if (strcmp(files_from, "-") == 0) {
2402                                 snprintf(err_buf, sizeof err_buf,
2403                                         "Invalid --files-from remote filename\n");
2404                                 return 0;
2405                         }
2406                 } else {
2407                         if (sanitize_paths)
2408                                 files_from = sanitize_path(NULL, files_from, NULL, 0, SP_DEFAULT);
2409                         if (daemon_filter_list.head) {
2410                                 char *dir;
2411                                 if (!*files_from)
2412                                         goto options_rejected;
2413                                 dir = files_from + (*files_from == '/' ? module_dirlen : 0);
2414                                 clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2415                                 if (check_filter(&daemon_filter_list, FLOG, dir, 0) < 0)
2416                                         goto options_rejected;
2417                         }
2418                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
2419                         if (filesfrom_fd < 0) {
2420                                 snprintf(err_buf, sizeof err_buf,
2421                                         "failed to open files-from file %s: %s\n",
2422                                         files_from, strerror(errno));
2423                                 return 0;
2424                         }
2425                 }
2426         }
2427
2428         am_starting_up = 0;
2429
2430         return 1;
2431
2432   options_rejected:
2433         snprintf(err_buf, sizeof err_buf,
2434                 "Your options have been rejected by the server.\n");
2435         return 0;
2436 }
2437
2438
2439 /**
2440  * Construct a filtered list of options to pass through from the
2441  * client to the server.
2442  *
2443  * This involves setting options that will tell the server how to
2444  * behave, and also filtering out options that are processed only
2445  * locally.
2446  **/
2447 void server_options(char **args, int *argc_p)
2448 {
2449         static char argstr[64];
2450         int ac = *argc_p;
2451         uchar where;
2452         char *arg;
2453         int i, x;
2454
2455         /* This should always remain first on the server's command-line. */
2456         args[ac++] = "--server";
2457
2458         if (daemon_over_rsh > 0) {
2459                 args[ac++] = "--daemon";
2460                 *argc_p = ac;
2461                 /* if we're passing --daemon, we're done */
2462                 return;
2463         }
2464
2465         if (!am_sender)
2466                 args[ac++] = "--sender";
2467
2468         x = 1;
2469         argstr[0] = '-';
2470
2471         if (protect_args)
2472                 argstr[x++] = 's';
2473
2474         for (i = 0; i < verbose; i++)
2475                 argstr[x++] = 'v';
2476
2477         if (quiet && msgs2stderr)
2478                 argstr[x++] = 'q';
2479         if (make_backups)
2480                 argstr[x++] = 'b';
2481         if (update_only)
2482                 argstr[x++] = 'u';
2483         if (!do_xfers) /* Note: NOT "dry_run"! */
2484                 argstr[x++] = 'n';
2485         if (preserve_links)
2486                 argstr[x++] = 'l';
2487         if ((xfer_dirs >= 2 && xfer_dirs < 4)
2488          || (xfer_dirs && !recurse && (list_only || (delete_mode && am_sender))))
2489                 argstr[x++] = 'd';
2490         if (am_sender) {
2491                 if (keep_dirlinks)
2492                         argstr[x++] = 'K';
2493                 if (prune_empty_dirs)
2494                         argstr[x++] = 'm';
2495                 if (omit_dir_times)
2496                         argstr[x++] = 'O';
2497                 if (omit_link_times)
2498                         argstr[x++] = 'J';
2499                 if (fuzzy_basis) {
2500                         argstr[x++] = 'y';
2501                         if (fuzzy_basis > 1)
2502                                 argstr[x++] = 'y';
2503                 }
2504         } else {
2505                 if (copy_links)
2506                         argstr[x++] = 'L';
2507                 if (copy_dirlinks)
2508                         argstr[x++] = 'k';
2509         }
2510
2511         if (whole_file > 0)
2512                 argstr[x++] = 'W';
2513         /* We don't need to send --no-whole-file, because it's the
2514          * default for remote transfers, and in any case old versions
2515          * of rsync will not understand it. */
2516
2517         if (preserve_hard_links) {
2518                 argstr[x++] = 'H';
2519                 if (preserve_hard_links > 1)
2520                         argstr[x++] = 'H';
2521         }
2522         if (preserve_uid)
2523                 argstr[x++] = 'o';
2524         if (preserve_gid)
2525                 argstr[x++] = 'g';
2526         if (preserve_devices) /* ignore preserve_specials here */
2527                 argstr[x++] = 'D';
2528         if (preserve_times)
2529                 argstr[x++] = 't';
2530         if (preserve_atimes) {
2531                 argstr[x++] = 'U';
2532                 if (preserve_atimes > 1)
2533                         argstr[x++] = 'U';
2534         }
2535         if (preserve_perms)
2536                 argstr[x++] = 'p';
2537         else if (preserve_executability && am_sender)
2538                 argstr[x++] = 'E';
2539 #ifdef SUPPORT_ACLS
2540         if (preserve_acls)
2541                 argstr[x++] = 'A';
2542 #endif
2543 #ifdef SUPPORT_XATTRS
2544         if (preserve_xattrs) {
2545                 argstr[x++] = 'X';
2546                 if (preserve_xattrs > 1)
2547                         argstr[x++] = 'X';
2548         }
2549 #endif
2550         if (recurse)
2551                 argstr[x++] = 'r';
2552         if (always_checksum)
2553                 argstr[x++] = 'c';
2554         if (cvs_exclude)
2555                 argstr[x++] = 'C';
2556         if (ignore_times)
2557                 argstr[x++] = 'I';
2558         if (relative_paths)
2559                 argstr[x++] = 'R';
2560         if (one_file_system) {
2561                 argstr[x++] = 'x';
2562                 if (one_file_system > 1)
2563                         argstr[x++] = 'x';
2564         }
2565         if (sparse_files)
2566                 argstr[x++] = 'S';
2567         if (do_compression == CPRES_ZLIB)
2568                 argstr[x++] = 'z';
2569
2570         set_allow_inc_recurse();
2571
2572         /* We don't really know the actual protocol_version at this point,
2573          * but checking the pre-negotiated value allows the user to use a
2574          * --protocol=29 override to avoid the use of this -eFLAGS opt. */
2575         if (protocol_version >= 30) {
2576                 /* Use "eFlags" alias so that cull_options doesn't think that these are no-arg option letters. */
2577 #define eFlags argstr
2578                 /* We make use of the -e option to let the server know about
2579                  * any pre-release protocol version && some behavior flags. */
2580                 eFlags[x++] = 'e';
2581 #if SUBPROTOCOL_VERSION != 0
2582                 if (protocol_version == PROTOCOL_VERSION) {
2583                         x += snprintf(argstr+x, sizeof argstr - x,
2584                                       "%d.%d",
2585                                       PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
2586                 } else
2587 #endif
2588                         eFlags[x++] = '.';
2589                 if (allow_inc_recurse)
2590                         eFlags[x++] = 'i';
2591 #ifdef CAN_SET_SYMLINK_TIMES
2592                 eFlags[x++] = 'L'; /* symlink time-setting support */
2593 #endif
2594 #ifdef ICONV_OPTION
2595                 eFlags[x++] = 's'; /* symlink iconv translation support */
2596 #endif
2597                 eFlags[x++] = 'f'; /* flist I/O-error safety support */
2598                 eFlags[x++] = 'x'; /* xattr hardlink optimization not desired */
2599                 eFlags[x++] = 'C'; /* support checksum seed order fix */
2600                 eFlags[x++] = 'I'; /* support inplace_partial behavior */
2601                 eFlags[x++] = 'v'; /* use varint for flist & compat flags; negotiate checksum */
2602                 /* NOTE: Avoid using 'V' -- it was the high bit of a write_byte() that became write_varint(). */
2603 #undef eFlags
2604         }
2605
2606         if (x >= (int)sizeof argstr) { /* Not possible... */
2607                 rprintf(FERROR, "argstr overflow in server_options().\n");
2608                 exit_cleanup(RERR_MALLOC);
2609         }
2610
2611         argstr[x] = '\0';
2612
2613         if (x > 1)
2614                 args[ac++] = argstr;
2615
2616 #ifdef ICONV_OPTION
2617         if (iconv_opt) {
2618                 char *set = strchr(iconv_opt, ',');
2619                 if (set)
2620                         set++;
2621                 else
2622                         set = iconv_opt;
2623                 if (asprintf(&arg, "--iconv=%s", set) < 0)
2624                         goto oom;
2625                 args[ac++] = arg;
2626         }
2627 #endif
2628
2629         if (protect_args && !local_server) /* unprotected args stop here */
2630                 args[ac++] = NULL;
2631
2632         if (list_only > 1)
2633                 args[ac++] = "--list-only";
2634
2635         /* This makes sure that the remote rsync can handle deleting with -d
2636          * sans -r because the --no-r option was added at the same time. */
2637         if (xfer_dirs && !recurse && delete_mode && am_sender)
2638                 args[ac++] = "--no-r";
2639
2640         if (do_compression && do_compression_level != CLVL_NOT_SPECIFIED) {
2641                 if (asprintf(&arg, "--compress-level=%d", do_compression_level) < 0)
2642                         goto oom;
2643                 args[ac++] = arg;
2644         }
2645
2646         if (preserve_devices) {
2647                 /* Note: sending "--devices" would not be backward-compatible. */
2648                 if (!preserve_specials)
2649                         args[ac++] = "--no-specials"; /* -D is already set. */
2650         } else if (preserve_specials)
2651                 args[ac++] = "--specials";
2652
2653         /* The server side doesn't use our log-format, but in certain
2654          * circumstances they need to know a little about the option. */
2655         if (stdout_format && am_sender) {
2656                 /* Use --log-format, not --out-format, for compatibility. */
2657                 if (stdout_format_has_i > 1)
2658                         args[ac++] = "--log-format=%i%I";
2659                 else if (stdout_format_has_i)
2660                         args[ac++] = "--log-format=%i";
2661                 else if (stdout_format_has_o_or_i)
2662                         args[ac++] = "--log-format=%o";
2663                 else if (!verbose)
2664                         args[ac++] = "--log-format=X";
2665         }
2666
2667         if (block_size) {
2668                 if (asprintf(&arg, "-B%lu", block_size) < 0)
2669                         goto oom;
2670                 args[ac++] = arg;
2671         }
2672
2673         if (io_timeout) {
2674                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
2675                         goto oom;
2676                 args[ac++] = arg;
2677         }
2678
2679         if (bwlimit) {
2680                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
2681                         goto oom;
2682                 args[ac++] = arg;
2683         }
2684
2685         if (backup_dir) {
2686                 args[ac++] = "--backup-dir";
2687                 args[ac++] = backup_dir;
2688         }
2689
2690         /* Only send --suffix if it specifies a non-default value. */
2691         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
2692                 /* We use the following syntax to avoid weirdness with '~'. */
2693                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
2694                         goto oom;
2695                 args[ac++] = arg;
2696         }
2697
2698         if (checksum_choice) {
2699                 if (asprintf(&arg, "--checksum-choice=%s", checksum_choice) < 0)
2700                         goto oom;
2701                 args[ac++] = arg;
2702         }
2703
2704         if (do_compression == CPRES_ZLIBX)
2705                 args[ac++] = "--new-compress";
2706         else if (compress_choice && do_compression == CPRES_ZLIB)
2707                 args[ac++] = "--old-compress";
2708         else if (compress_choice) {
2709                 if (asprintf(&arg, "--compress-choice=%s", compress_choice) < 0)
2710                         goto oom;
2711                 args[ac++] = arg;
2712         }
2713
2714         if (am_sender) {
2715                 if (max_delete > 0) {
2716                         if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
2717                                 goto oom;
2718                         args[ac++] = arg;
2719                 } else if (max_delete == 0)
2720                         args[ac++] = "--max-delete=-1";
2721                 if (min_size >= 0) {
2722                         args[ac++] = "--min-size";
2723                         args[ac++] = min_size_arg;
2724                 }
2725                 if (max_size >= 0) {
2726                         args[ac++] = "--max-size";
2727                         args[ac++] = max_size_arg;
2728                 }
2729                 if (delete_before)
2730                         args[ac++] = "--delete-before";
2731                 else if (delete_during == 2)
2732                         args[ac++] = "--delete-delay";
2733                 else if (delete_during)
2734                         args[ac++] = "--delete-during";
2735                 else if (delete_after)
2736                         args[ac++] = "--delete-after";
2737                 else if (delete_mode && !delete_excluded)
2738                         args[ac++] = "--delete";
2739                 if (delete_excluded)
2740                         args[ac++] = "--delete-excluded";
2741                 if (force_delete)
2742                         args[ac++] = "--force";
2743                 if (write_batch < 0)
2744                         args[ac++] = "--only-write-batch=X";
2745                 if (am_root > 1)
2746                         args[ac++] = "--super";
2747                 if (size_only)
2748                         args[ac++] = "--size-only";
2749                 if (do_stats)
2750                         args[ac++] = "--stats";
2751         } else {
2752                 if (skip_compress) {
2753                         if (asprintf(&arg, "--skip-compress=%s", skip_compress) < 0)
2754                                 goto oom;
2755                         args[ac++] = arg;
2756                 }
2757         }
2758
2759         /* --delete-missing-args needs the cooperation of both sides, but
2760          * the sender can handle --ignore-missing-args by itself. */
2761         if (missing_args == 2)
2762                 args[ac++] = "--delete-missing-args";
2763         else if (missing_args == 1 && !am_sender)
2764                 args[ac++] = "--ignore-missing-args";
2765
2766         if (modify_window_set && am_sender) {
2767                 char *fmt = modify_window < 0 ? "-@%d" : "--modify-window=%d";
2768                 if (asprintf(&arg, fmt, modify_window) < 0)
2769                         goto oom;
2770                 args[ac++] = arg;
2771         }
2772
2773         if (checksum_seed) {
2774                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
2775                         goto oom;
2776                 args[ac++] = arg;
2777         }
2778
2779         if (partial_dir && am_sender) {
2780                 if (partial_dir != tmp_partialdir) {
2781                         args[ac++] = "--partial-dir";
2782                         args[ac++] = partial_dir;
2783                 }
2784                 if (delay_updates)
2785                         args[ac++] = "--delay-updates";
2786         } else if (keep_partial && am_sender)
2787                 args[ac++] = "--partial";
2788
2789         if (ignore_errors)
2790                 args[ac++] = "--ignore-errors";
2791
2792         if (copy_unsafe_links)
2793                 args[ac++] = "--copy-unsafe-links";
2794
2795         if (safe_symlinks)
2796                 args[ac++] = "--safe-links";
2797
2798         if (numeric_ids)
2799                 args[ac++] = "--numeric-ids";
2800
2801         if (use_qsort)
2802                 args[ac++] = "--use-qsort";
2803
2804         if (am_sender) {
2805                 if (usermap) {
2806                         if (asprintf(&arg, "--usermap=%s", usermap) < 0)
2807                                 goto oom;
2808                         args[ac++] = arg;
2809                 }
2810
2811                 if (groupmap) {
2812                         if (asprintf(&arg, "--groupmap=%s", groupmap) < 0)
2813                                 goto oom;
2814                         args[ac++] = arg;
2815                 }
2816
2817                 if (ignore_existing)
2818                         args[ac++] = "--ignore-existing";
2819
2820                 /* Backward compatibility: send --existing, not --ignore-non-existing. */
2821                 if (ignore_non_existing)
2822                         args[ac++] = "--existing";
2823
2824                 if (tmpdir) {
2825                         args[ac++] = "--temp-dir";
2826                         args[ac++] = tmpdir;
2827                 }
2828
2829                 if (basis_dir[0]) {
2830                         /* the server only needs this option if it is not the sender,
2831                          *   and it may be an older version that doesn't know this
2832                          *   option, so don't send it if client is the sender.
2833                          */
2834                         for (i = 0; i < basis_dir_cnt; i++) {
2835                                 args[ac++] = alt_dest_opt(0);
2836                                 args[ac++] = basis_dir[i];
2837                         }
2838                 }
2839         }
2840
2841         /* What flags do we need to send to the other side? */
2842         where = (am_server ? W_CLI : W_SRV) | (am_sender ? W_REC : W_SND);
2843         arg = make_output_option(info_words, info_levels, where);
2844         if (arg)
2845                 args[ac++] = arg;
2846
2847         if (append_mode) {
2848                 if (append_mode > 1)
2849                         args[ac++] = "--append";
2850                 args[ac++] = "--append";
2851         } else if (inplace)
2852                 args[ac++] = "--inplace";
2853
2854         if (files_from && (!am_sender || filesfrom_host)) {
2855                 if (filesfrom_host) {
2856                         args[ac++] = "--files-from";
2857                         args[ac++] = files_from;
2858                         if (eol_nulls)
2859                                 args[ac++] = "--from0";
2860                 } else {
2861                         args[ac++] = "--files-from=-";
2862                         args[ac++] = "--from0";
2863                 }
2864                 if (!relative_paths)
2865                         args[ac++] = "--no-relative";
2866         }
2867         /* It's OK that this checks the upper-bound of the protocol_version. */
2868         if (relative_paths && !implied_dirs && (!am_sender || protocol_version >= 30))
2869                 args[ac++] = "--no-implied-dirs";
2870
2871         if (write_devices && am_sender)
2872                 args[ac++] = "--write-devices";
2873
2874         if (remove_source_files == 1)
2875                 args[ac++] = "--remove-source-files";
2876         else if (remove_source_files)
2877                 args[ac++] = "--remove-sent-files";
2878
2879         if (preallocate_files && am_sender)
2880                 args[ac++] = "--preallocate";
2881
2882         if (open_noatime && preserve_atimes <= 1)
2883                 args[ac++] = "--open-noatime";
2884
2885         if (ac > MAX_SERVER_ARGS) { /* Not possible... */
2886                 rprintf(FERROR, "argc overflow in server_options().\n");
2887                 exit_cleanup(RERR_MALLOC);
2888         }
2889
2890         if (remote_option_cnt) {
2891                 int j;
2892                 if (ac + remote_option_cnt > MAX_SERVER_ARGS) {
2893                         rprintf(FERROR, "too many remote options specified.\n");
2894                         exit_cleanup(RERR_SYNTAX);
2895                 }
2896                 for (j = 1; j <= remote_option_cnt; j++)
2897                         args[ac++] = (char*)remote_options[j];
2898         }
2899
2900         *argc_p = ac;
2901         return;
2902
2903     oom:
2904         out_of_memory("server_options");
2905 }
2906
2907 /* If str points to a valid hostspec, return allocated memory containing the
2908  * [USER@]HOST part of the string, and set the path_start_ptr to the part of
2909  * the string after the host part.  Otherwise, return NULL.  If port_ptr is
2910  * non-NULL, we must be parsing an rsync:// URL hostname, and we will set
2911  * *port_ptr if a port number is found.  Note that IPv6 IPs will have their
2912  * (required for parsing) [ and ] chars elided from the returned string. */
2913 static char *parse_hostspec(char *str, char **path_start_ptr, int *port_ptr)
2914 {
2915         char *s, *host_start = str;
2916         int hostlen = 0, userlen = 0;
2917         char *ret;
2918
2919         for (s = str; ; s++) {
2920                 if (!*s) {
2921                         /* It is only OK if we run out of string with rsync:// */
2922                         if (!port_ptr)
2923                                 return NULL;
2924                         if (!hostlen)
2925                                 hostlen = s - host_start;
2926                         break;
2927                 }
2928                 if (*s == ':' || *s == '/') {
2929                         if (!hostlen)
2930                                 hostlen = s - host_start;
2931                         if (*s++ == '/') {
2932                                 if (!port_ptr)
2933                                         return NULL;
2934                         } else if (port_ptr) {
2935                                 *port_ptr = atoi(s);
2936                                 while (isDigit(s)) s++;
2937                                 if (*s && *s++ != '/')
2938                                         return NULL;
2939                         }
2940                         break;
2941                 }
2942                 if (*s == '@') {
2943                         userlen = s - str + 1;
2944                         host_start = s + 1;
2945                 } else if (*s == '[') {
2946                         if (s != host_start++)
2947                                 return NULL;
2948                         while (*s && *s != ']' && *s != '/') s++; /*SHARED ITERATOR*/
2949                         hostlen = s - host_start;
2950                         if (*s != ']' || (s[1] && s[1] != '/' && s[1] != ':') || !hostlen)
2951                                 return NULL;
2952                 }
2953         }
2954
2955         *path_start_ptr = s;
2956         ret = new_array(char, userlen + hostlen + 1);
2957         if (userlen)
2958                 strlcpy(ret, str, userlen + 1);
2959         strlcpy(ret + userlen, host_start, hostlen + 1);
2960         return ret;
2961 }
2962
2963 /* Look for a HOST specification of the form "HOST:PATH", "HOST::PATH", or
2964  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
2965  * memory with the HOST.  If a daemon-accessing spec was specified, the value
2966  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
2967  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
2968  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
2969  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
2970 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
2971 {
2972         char *path;
2973
2974         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
2975                 *host_ptr = parse_hostspec(s + strlen(URL_PREFIX), &path, port_ptr);
2976                 if (*host_ptr) {
2977                         if (!*port_ptr)
2978                                 *port_ptr = -1; /* -1 indicates they want the default */
2979                         return path;
2980                 }
2981         }
2982
2983         *host_ptr = parse_hostspec(s, &path, NULL);
2984         if (!*host_ptr)
2985                 return NULL;
2986
2987         if (*path == ':') {
2988                 if (port_ptr && !*port_ptr)
2989                         *port_ptr = -1;
2990                 return path + 1;
2991         }
2992         if (port_ptr)
2993                 *port_ptr = 0;
2994
2995         return path;
2996 }