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 *early_input_file = NULL;
 174 char *rsync_path = RSYNC_PATH;
 175 char *backup_dir = NULL;
 176 char backup_dir_buf[MAXPATHLEN];
 177 char *sockopts = NULL;
 178 char *usermap = NULL;
 179 char *groupmap = NULL;
 180 int rsync_port = 0;
 181 int alt_dest_type = 0;
 182 int basis_dir_cnt = 0;
 183
 184 static int version_opt_cnt = 0;
 185 static int remote_option_alloc = 0;
 186 int remote_option_cnt = 0;
 187 const char **remote_options = NULL;
 188 const char *checksum_choice = NULL;
 189 const char *compress_choice = NULL;
 190
 191 #ifndef __APPLE__ /* Do we need a configure check for this? */
 192 #define SUPPORT_ATIMES 1
 193 #endif
 194
 195 int quiet = 0;
 196 int output_motd = 1;
 197 int log_before_transfer = 0;
 198 int stdout_format_has_i = 0;
 199 int stdout_format_has_o_or_i = 0;
 200 int logfile_format_has_i = 0;
 201 int logfile_format_has_o_or_i = 0;
 202 int always_checksum = 0;
 203 int list_only = 0;
 204
 205 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
 206 char *batch_name = NULL;
 207
 208 int need_unsorted_flist = 0;
 209 char *iconv_opt =
 210 #ifdef ICONV_OPTION
 211                 ICONV_OPTION;
 212 #else
 213                 NULL;
 214 #endif
 215
 216 struct chmod_mode_struct *chmod_modes = NULL;
 217
 218 static const char *debug_verbosity[] = {
 219         /*0*/ NULL,
 220         /*1*/ NULL,
 221         /*2*/ "BIND,CMD,CONNECT,DEL,DELTASUM,DUP,FILTER,FLIST,ICONV",
 222         /*3*/ "ACL,BACKUP,CONNECT2,DELTASUM2,DEL2,EXIT,FILTER2,FLIST2,FUZZY,GENR,OWN,RECV,SEND,TIME",
 223         /*4*/ "CMD2,DELTASUM3,DEL3,EXIT2,FLIST3,ICONV2,OWN2,PROTO,TIME2",
 224         /*5*/ "CHDIR,DELTASUM4,FLIST4,FUZZY2,HASH,HLINK",
 225 };
 226
 227 #define MAX_VERBOSITY ((int)(sizeof debug_verbosity / sizeof debug_verbosity[0]) - 1)
 228
 229 static const char *info_verbosity[1+MAX_VERBOSITY] = {
 230         /*0*/ NULL,
 231         /*1*/ "COPY,DEL,FLIST,MISC,NAME,STATS,SYMSAFE",
 232         /*2*/ "BACKUP,MISC2,MOUNT,NAME2,REMOVE,SKIP",
 233 };
 234
 235 #define MAX_OUT_LEVEL 4 /* The largest N allowed for any flagN word. */
 236
 237 short info_levels[COUNT_INFO], debug_levels[COUNT_DEBUG];
 238
 239 #define DEFAULT_PRIORITY 0      /* Default/implied/--verbose set values. */
 240 #define HELP_PRIORITY 1         /* The help output uses this level. */
 241 #define USER_PRIORITY 2         /* User-specified via --info or --debug */
 242 #define LIMIT_PRIORITY 3        /* Overriding priority when limiting values. */
 243
 244 #define W_CLI (1<<0)    /* client side */
 245 #define W_SRV (1<<1)    /* server side */
 246 #define W_SND (1<<2)    /* sending side */
 247 #define W_REC (1<<3)    /* receiving side */
 248
 249 struct output_struct {
 250         char *name;     /* The name of the info/debug flag. */
 251         char *help;     /* The description of the info/debug flag. */
 252         uchar namelen;  /* The length of the name string. */
 253         uchar flag;     /* The flag's value, for consistency check. */
 254         uchar where;    /* Bits indicating where the flag is used. */
 255         uchar priority; /* See *_PRIORITY defines. */
 256 };
 257
 258 #define INFO_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, INFO_##flag, where, 0 }
 259
 260 static struct output_struct info_words[COUNT_INFO+1] = {
 261         INFO_WORD(BACKUP, W_REC, "Mention files backed up"),
 262         INFO_WORD(COPY, W_REC, "Mention files copied locally on the receiving side"),
 263         INFO_WORD(DEL, W_REC, "Mention deletions on the receiving side"),
 264         INFO_WORD(FLIST, W_CLI, "Mention file-list receiving/sending (levels 1-2)"),
 265         INFO_WORD(MISC, W_SND|W_REC, "Mention miscellaneous information (levels 1-2)"),
 266         INFO_WORD(MOUNT, W_SND|W_REC, "Mention mounts that were found or skipped"),
 267         INFO_WORD(NAME, W_SND|W_REC, "Mention 1) updated file/dir names, 2) unchanged names"),
 268         INFO_WORD(PROGRESS, W_CLI, "Mention 1) per-file progress or 2) total transfer progress"),
 269         INFO_WORD(REMOVE, W_SND, "Mention files removed on the sending side"),
 270         INFO_WORD(SKIP, W_REC, "Mention files that are skipped due to options used"),
 271         INFO_WORD(STATS, W_CLI|W_SRV, "Mention statistics at end of run (levels 1-3)"),
 272         INFO_WORD(SYMSAFE, W_SND|W_REC, "Mention symlinks that are unsafe"),
 273         { NULL, "--info", 0, 0, 0, 0 }
 274 };
 275
 276 #define DEBUG_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, DEBUG_##flag, where, 0 }
 277
 278 static struct output_struct debug_words[COUNT_DEBUG+1] = {
 279         DEBUG_WORD(ACL, W_SND|W_REC, "Debug extra ACL info"),
 280         DEBUG_WORD(BACKUP, W_REC, "Debug backup actions (levels 1-2)"),
 281         DEBUG_WORD(BIND, W_CLI, "Debug socket bind actions"),
 282         DEBUG_WORD(CHDIR, W_CLI|W_SRV, "Debug when the current directory changes"),
 283         DEBUG_WORD(CONNECT, W_CLI, "Debug connection events (levels 1-2)"),
 284         DEBUG_WORD(CMD, W_CLI, "Debug commands+options that are issued (levels 1-2)"),
 285         DEBUG_WORD(DEL, W_REC, "Debug delete actions (levels 1-3)"),
 286         DEBUG_WORD(DELTASUM, W_SND|W_REC, "Debug delta-transfer checksumming (levels 1-4)"),
 287         DEBUG_WORD(DUP, W_REC, "Debug weeding of duplicate names"),
 288         DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-3)"),
 289         DEBUG_WORD(FILTER, W_SND|W_REC, "Debug filter actions (levels 1-2)"),
 290         DEBUG_WORD(FLIST, W_SND|W_REC, "Debug file-list operations (levels 1-4)"),
 291         DEBUG_WORD(FUZZY, W_REC, "Debug fuzzy scoring (levels 1-2)"),
 292         DEBUG_WORD(GENR, W_REC, "Debug generator functions"),
 293         DEBUG_WORD(HASH, W_SND|W_REC, "Debug hashtable code"),
 294         DEBUG_WORD(HLINK, W_SND|W_REC, "Debug hard-link actions (levels 1-3)"),
 295         DEBUG_WORD(ICONV, W_CLI|W_SRV, "Debug iconv character conversions (levels 1-2)"),
 296         DEBUG_WORD(IO, W_CLI|W_SRV, "Debug I/O routines (levels 1-4)"),
 297         DEBUG_WORD(NSTR, W_CLI|W_SRV, "Debug negotiation strings"),
 298         DEBUG_WORD(OWN, W_REC, "Debug ownership changes in users & groups (levels 1-2)"),
 299         DEBUG_WORD(PROTO, W_CLI|W_SRV, "Debug protocol information"),
 300         DEBUG_WORD(RECV, W_REC, "Debug receiver functions"),
 301         DEBUG_WORD(SEND, W_SND, "Debug sender functions"),
 302         DEBUG_WORD(TIME, W_REC, "Debug setting of modified times (levels 1-2)"),
 303         { NULL, "--debug", 0, 0, 0, 0 }
 304 };
 305
 306 static int verbose = 0;
 307 static int do_stats = 0;
 308 static int do_progress = 0;
 309 static int daemon_opt;   /* sets am_daemon after option error-reporting */
 310 static int omit_dir_times = 0;
 311 static int omit_link_times = 0;
 312 static int F_option_cnt = 0;
 313 static int modify_window_set;
 314 static int itemize_changes = 0;
 315 static int refused_delete, refused_archive_part, refused_compress;
 316 static int refused_partial, refused_progress, refused_delete_before;
 317 static int refused_delete_during;
 318 static int refused_inplace, refused_no_iconv;
 319 static BOOL usermap_via_chown, groupmap_via_chown;
 320 static char *outbuf_mode;
 321 static char *bwlimit_arg, *max_size_arg, *min_size_arg;
 322 static char tmp_partialdir[] = ".~tmp~";
 323
 324 /** Local address to bind.  As a character string because it's
 325  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
 326  * address, or a hostname. **/
 327 char *bind_address;
 328
 329 static void output_item_help(struct output_struct *words);
 330
 331 /* This constructs a string that represents all the options set for either
 332  * the --info or --debug setting, skipping any implied options (by -v, etc.).
 333  * This is used both when conveying the user's options to the server, and
 334  * when the help output wants to tell the user what options are implied. */
 335 static char *make_output_option(struct output_struct *words, short *levels, uchar where)
 336 {
 337         char *str = words == info_words ? "--info=" : "--debug=";
 338         int j, counts[MAX_OUT_LEVEL+1], pos, skipped = 0, len = 0, max = 0, lev = 0;
 339         int word_count = words == info_words ? COUNT_INFO : COUNT_DEBUG;
 340         char *buf;
 341
 342         memset(counts, 0, sizeof counts);
 343
 344         for (j = 0; words[j].name; j++) {
 345                 if (words[j].flag != j) {
 346                         rprintf(FERROR, "rsync: internal error on %s%s: %d != %d\n",
 347                                 words == info_words ? "INFO_" : "DEBUG_",
 348                                 words[j].name, words[j].flag, j);
 349                         exit_cleanup(RERR_UNSUPPORTED);
 350                 }
 351                 if (!(words[j].where & where))
 352                         continue;
 353                 if (words[j].priority == DEFAULT_PRIORITY) {
 354                         /* Implied items don't need to be mentioned. */
 355                         skipped++;
 356                         continue;
 357                 }
 358                 len += len ? 1 : strlen(str);
 359                 len += strlen(words[j].name);
 360                 len += levels[j] == 1 ? 0 : 1;
 361
 362                 if (words[j].priority == HELP_PRIORITY)
 363                         continue; /* no abbreviating for help */
 364
 365                 assert(levels[j] <= MAX_OUT_LEVEL);
 366                 if (++counts[levels[j]] > max) {
 367                         /* Determine which level has the most items. */
 368                         lev = levels[j];
 369                         max = counts[lev];
 370                 }
 371         }
 372
 373         /* Sanity check the COUNT_* define against the length of the table. */
 374         if (j != word_count) {
 375                 rprintf(FERROR, "rsync: internal error: %s is wrong! (%d != %d)\n",
 376                         words == info_words ? "COUNT_INFO" : "COUNT_DEBUG",
 377                         j, word_count);
 378                 exit_cleanup(RERR_UNSUPPORTED);
 379         }
 380
 381         if (!len)
 382                 return NULL;
 383
 384         len++;
 385         if (!(buf = new_array(char, len)))
 386                 out_of_memory("make_output_option");
 387         pos = 0;
 388
 389         if (skipped || max < 5)
 390                 lev = -1;
 391         else {
 392                 if (lev == 0)
 393                         pos += snprintf(buf, len, "%sNONE", str);
 394                 else if (lev == 1)
 395                         pos += snprintf(buf, len, "%sALL", str);
 396                 else
 397                         pos += snprintf(buf, len, "%sALL%d", str, lev);
 398         }
 399
 400         for (j = 0; words[j].name && pos < len; j++) {
 401                 if (words[j].priority == DEFAULT_PRIORITY || levels[j] == lev || !(words[j].where & where))
 402                         continue;
 403                 if (pos)
 404                         buf[pos++] = ',';
 405                 else
 406                         pos += strlcpy(buf+pos, str, len-pos);
 407                 if (pos < len)
 408                         pos += strlcpy(buf+pos, words[j].name, len-pos);
 409                 /* Level 1 is implied by the name alone. */
 410                 if (levels[j] != 1 && pos < len)
 411                         buf[pos++] = '0' + levels[j];
 412         }
 413
 414         buf[pos] = '\0';
 415
 416         return buf;
 417 }
 418
 419 static void parse_output_words(struct output_struct *words, short *levels, const char *str, uchar priority)
 420 {
 421         const char *s;
 422         int j, len, lev;
 423
 424         for ( ; str; str = s) {
 425                 if ((s = strchr(str, ',')) != NULL)
 426                         len = s++ - str;
 427                 else
 428                         len = strlen(str);
 429                 if (!len)
 430                         continue;
 431                 if (!isDigit(str)) {
 432                         while (len && isDigit(str+len-1))
 433                                 len--;
 434                 }
 435                 lev = isDigit(str+len) ? atoi(str+len) : 1;
 436                 if (lev > MAX_OUT_LEVEL)
 437                         lev = MAX_OUT_LEVEL;
 438                 if (len == 4 && strncasecmp(str, "help", 4) == 0) {
 439                         output_item_help(words);
 440                         exit_cleanup(0);
 441                 }
 442                 if (len == 4 && strncasecmp(str, "none", 4) == 0)
 443                         len = lev = 0;
 444                 else if (len == 3 && strncasecmp(str, "all", 3) == 0)
 445                         len = 0;
 446                 for (j = 0; words[j].name; j++) {
 447                         if (!len
 448                          || (len == words[j].namelen && strncasecmp(str, words[j].name, len) == 0)) {
 449                                 if (priority >= words[j].priority) {
 450                                         words[j].priority = priority;
 451                                         levels[j] = lev;
 452                                 }
 453                                 if (len)
 454                                         break;
 455                         }
 456                 }
 457                 if (len && !words[j].name && !am_server) {
 458                         rprintf(FERROR, "Unknown %s item: \"%.*s\"\n",
 459                                 words[j].help, len, str);
 460                         exit_cleanup(RERR_SYNTAX);
 461                 }
 462         }
 463 }
 464
 465 /* Tell the user what all the info or debug flags mean. */
 466 static void output_item_help(struct output_struct *words)
 467 {
 468         short *levels = words == info_words ? info_levels : debug_levels;
 469         const char **verbosity = words == info_words ? info_verbosity : debug_verbosity;
 470         char buf[128], *opt, *fmt = "%-10s %s\n";
 471         int j;
 472
 473         reset_output_levels();
 474
 475         rprintf(FINFO, "Use OPT or OPT1 for level 1 output, OPT2 for level 2, etc.; OPT0 silences.\n");
 476         rprintf(FINFO, "\n");
 477         for (j = 0; words[j].name; j++)
 478                 rprintf(FINFO, fmt, words[j].name, words[j].help);
 479         rprintf(FINFO, "\n");
 480
 481         snprintf(buf, sizeof buf, "Set all %s options (e.g. all%d)",
 482                  words[j].help, MAX_OUT_LEVEL);
 483         rprintf(FINFO, fmt, "ALL", buf);
 484
 485         snprintf(buf, sizeof buf, "Silence all %s options (same as all0)",
 486                  words[j].help);
 487         rprintf(FINFO, fmt, "NONE", buf);
 488
 489         rprintf(FINFO, fmt, "HELP", "Output this help message");
 490         rprintf(FINFO, "\n");
 491         rprintf(FINFO, "Options added for each increase in verbose level:\n");
 492
 493         for (j = 1; j <= MAX_VERBOSITY; j++) {
 494                 parse_output_words(words, levels, verbosity[j], HELP_PRIORITY);
 495                 opt = make_output_option(words, levels, W_CLI|W_SRV|W_SND|W_REC);
 496                 if (opt) {
 497                         rprintf(FINFO, "%d) %s\n", j, strchr(opt, '=')+1);
 498                         free(opt);
 499                 }
 500                 reset_output_levels();
 501         }
 502 }
 503
 504 /* The --verbose option now sets info+debug flags. */
 505 static void set_output_verbosity(int level, uchar priority)
 506 {
 507         int j;
 508
 509         if (level > MAX_VERBOSITY)
 510                 level = MAX_VERBOSITY;
 511
 512         for (j = 1; j <= level; j++) {
 513                 parse_output_words(info_words, info_levels, info_verbosity[j], priority);
 514                 parse_output_words(debug_words, debug_levels, debug_verbosity[j], priority);
 515         }
 516 }
 517
 518 /* Limit the info+debug flag levels given a verbose-option level limit. */
 519 void limit_output_verbosity(int level)
 520 {
 521         short info_limits[COUNT_INFO], debug_limits[COUNT_DEBUG];
 522         int j;
 523
 524         if (level > MAX_VERBOSITY)
 525                 return;
 526
 527         memset(info_limits, 0, sizeof info_limits);
 528         memset(debug_limits, 0, sizeof debug_limits);
 529
 530         /* Compute the level limits in the above arrays. */
 531         for (j = 1; j <= level; j++) {
 532                 parse_output_words(info_words, info_limits, info_verbosity[j], LIMIT_PRIORITY);
 533                 parse_output_words(debug_words, debug_limits, debug_verbosity[j], LIMIT_PRIORITY);
 534         }
 535
 536         for (j = 0; j < COUNT_INFO; j++) {
 537                 if (info_levels[j] > info_limits[j])
 538                         info_levels[j] = info_limits[j];
 539         }
 540
 541         for (j = 0; j < COUNT_DEBUG; j++) {
 542                 if (debug_levels[j] > debug_limits[j])
 543                         debug_levels[j] = debug_limits[j];
 544         }
 545 }
 546
 547 void reset_output_levels(void)
 548 {
 549         int j;
 550
 551         memset(info_levels, 0, sizeof info_levels);
 552         memset(debug_levels, 0, sizeof debug_levels);
 553
 554         for (j = 0; j < COUNT_INFO; j++)
 555                 info_words[j].priority = DEFAULT_PRIORITY;
 556
 557         for (j = 0; j < COUNT_DEBUG; j++)
 558                 debug_words[j].priority = DEFAULT_PRIORITY;
 559 }
 560
 561 void negate_output_levels(void)
 562 {
 563         int j;
 564
 565         for (j = 0; j < COUNT_INFO; j++)
 566                 info_levels[j] *= -1;
 567
 568         for (j = 0; j < COUNT_DEBUG; j++)
 569                 debug_levels[j] *= -1;
 570 }
 571
 572 static char *istring(const char *fmt, int val)
 573 {
 574         char *str;
 575         if (asprintf(&str, fmt, val) < 0)
 576                 out_of_memory("istring");
 577         return str;
 578 }
 579
 580 static void print_capabilities(enum logcode f)
 581 {
 582         STRUCT_STAT *dumstat;
 583         char line_buf[75];
 584         int line_len, j;
 585         char *capabilities[] = {
 586                 istring("%d-bit files", (int)(sizeof (OFF_T) * 8)),
 587                 istring("%d-bit inums", (int)(sizeof dumstat->st_ino * 8)), /* Don't check ino_t! */
 588                 istring("%d-bit timestamps", (int)(sizeof (time_t) * 8)),
 589                 istring("%d-bit long ints", (int)(sizeof (int64) * 8)),
 590
 591 #ifndef HAVE_SOCKETPAIR
 592                 "no "
 593 #endif
 594                         "socketpairs",
 595
 596 #ifndef SUPPORT_HARD_LINKS
 597                 "no "
 598 #endif
 599                         "hardlinks",
 600
 601 #ifndef SUPPORT_LINKS
 602                 "no "
 603 #endif
 604                         "symlinks",
 605
 606 #ifndef INET6
 607                 "no "
 608 #endif
 609                         "IPv6",
 610
 611 #ifndef SUPPORT_ATIMES
 612                 "no "
 613 #endif
 614                         "atimes",
 615
 616                 "batchfiles",
 617
 618 #ifndef HAVE_FTRUNCATE
 619                 "no "
 620 #endif
 621                         "inplace",
 622
 623 #ifndef HAVE_FTRUNCATE
 624                 "no "
 625 #endif
 626                         "append",
 627
 628 #ifndef SUPPORT_ACLS
 629                 "no "
 630 #endif
 631                         "ACLs",
 632
 633 #ifndef SUPPORT_XATTRS
 634                 "no "
 635 #endif
 636                         "xattrs",
 637
 638 #ifdef RSYNC_USE_PROTECTED_ARGS
 639                 "default "
 640 #else
 641                 "optional "
 642 #endif
 643                         "protect-args",
 644
 645 #ifndef ICONV_OPTION
 646                 "no "
 647 #endif
 648                         "iconv",
 649
 650 #ifndef CAN_SET_SYMLINK_TIMES
 651                 "no "
 652 #endif
 653                         "symtimes",
 654
 655 #ifndef SUPPORT_PREALLOCATION
 656                 "no "
 657 #endif
 658                         "prealloc",
 659
 660         "*" /* All options after this point are hidden w/o -V -V */
 661 #ifndef HAVE_SIMD
 662                 "no "
 663 #endif
 664                         "SIMD",
 665
 666 #ifndef HAVE_ASM
 667                 "no "
 668 #endif
 669                         "asm",
 670
 671 #ifndef USE_OPENSSL
 672                 "no "
 673 #endif
 674                         "openssl-crypto",
 675
 676                 NULL
 677         };
 678
 679         for (line_len = 0, j = 0; ; j++) {
 680                 char *cap = capabilities[j];
 681                 if (!cap)
 682                         break;
 683                 if (*cap == '*') {
 684                         if (version_opt_cnt >= 2)
 685                                 capabilities[j]++;
 686                         else
 687                                 capabilities[j] = NULL;
 688                         break;
 689                 }
 690         }
 691
 692         for (line_len = 0, j = 0; ; j++) {
 693                 char *cap = capabilities[j];
 694                 int cap_len = cap ? strlen(cap) : 1000;
 695                 int need_comma = cap && capabilities[j+1] != NULL ? 1 : 0;
 696                 if (line_len + 1 + cap_len + need_comma >= (int)sizeof line_buf) {
 697                         rprintf(f, "   %s\n", line_buf);
 698                         line_len = 0;
 699                 }
 700                 if (!cap)
 701                         break;
 702                 line_len += snprintf(line_buf+line_len, sizeof line_buf - line_len, " %s%s", cap, need_comma ? "," : "");
 703         }
 704 }
 705
 706 static void print_rsync_version(enum logcode f)
 707 {
 708         char tmpbuf[256], *subprotocol = "";
 709
 710 #if SUBPROTOCOL_VERSION != 0
 711         subprotocol = istring(".PR%d", SUBPROTOCOL_VERSION);
 712 #endif
 713         rprintf(f, "%s  version %s  protocol version %d%s\n",
 714                 RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION, subprotocol);
 715
 716         rprintf(f, "Copyright (C) 1996-" LATEST_YEAR " by Andrew Tridgell, Wayne Davison, and others.\n");
 717         rprintf(f, "Web site: http://rsync.samba.org/\n");
 718
 719         rprintf(f, "Capabilities:\n");
 720         print_capabilities(f);
 721
 722         rprintf(f, "Checksum list:\n");
 723         get_default_nno_list(&valid_checksums, tmpbuf, sizeof tmpbuf, '(');
 724         rprintf(f, "    %s\n", tmpbuf);
 725
 726         rprintf(f, "Compress list:\n");
 727         get_default_nno_list(&valid_compressions, tmpbuf, sizeof tmpbuf, '(');
 728         rprintf(f, "    %s\n", tmpbuf);
 729
 730 #ifdef MAINTAINER_MODE
 731         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
 732 #endif
 733
 734 #if SIZEOF_INT64 < 8
 735         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
 736 #endif
 737         if (sizeof (int64) != SIZEOF_INT64) {
 738                 rprintf(f,
 739                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
 740                         (int) SIZEOF_INT64, (int) sizeof (int64));
 741         }
 742
 743         rprintf(f,"\n");
 744         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
 745         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
 746         rprintf(f,"General Public Licence for details.\n");
 747 }
 748
 749
 750 void usage(enum logcode F)
 751 {
 752   print_rsync_version(F);
 753
 754   rprintf(F,"\n");
 755   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
 756   rprintf(F,"via a fast differencing algorithm.\n");
 757
 758   rprintf(F,"\n");
 759   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
 760   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
 761   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
 762   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
 763   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
 764   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
 765   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
 766   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
 767   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
 768   rprintf(F,"\n");
 769   rprintf(F,"Options\n");
 770 #include "help-rsync.h"
 771   rprintf(F,"\n");
 772   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
 773   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
 774   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
 775 }
 776
 777 enum {OPT_SERVER = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
 778       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
 779       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
 780       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
 781       OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, OPT_INFO, OPT_DEBUG,
 782       OPT_USERMAP, OPT_GROUPMAP, OPT_CHOWN, OPT_BWLIMIT,
 783       OPT_OLD_COMPRESS, OPT_NEW_COMPRESS, OPT_NO_COMPRESS,
 784       OPT_REFUSED_BASE = 9000};
 785
 786 static struct poptOption long_options[] = {
 787   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 788   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
 789   {"version",         'V', POPT_ARG_NONE,   0, 'V', 0, 0},
 790   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
 791   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 792   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 793   {"info",             0,  POPT_ARG_STRING, 0, OPT_INFO, 0, 0 },
 794   {"debug",            0,  POPT_ARG_STRING, 0, OPT_DEBUG, 0, 0 },
 795   {"msgs2stderr",      0,  POPT_ARG_NONE,   &msgs2stderr, 0, 0, 0 },
 796   {"no-msgs2stderr",   0,  POPT_ARG_VAL,    &msgs2stderr, 0, 0, 0 },
 797   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
 798   {"motd",             0,  POPT_ARG_VAL,    &output_motd, 1, 0, 0 },
 799   {"no-motd",          0,  POPT_ARG_VAL,    &output_motd, 0, 0, 0 },
 800   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
 801   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
 802   {"no-human-readable",0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 803   {"no-h",             0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 804   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
 805   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
 806   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
 807   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 808   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 809   {"inc-recursive",    0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 810   {"no-inc-recursive", 0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 811   {"i-r",              0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 812   {"no-i-r",           0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 813   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
 814   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 815   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 816   {"old-dirs",         0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 817   {"old-d",            0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 818   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
 819   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 820   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 821   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
 822   {"acls",            'A', POPT_ARG_NONE,   0, 'A', 0, 0 },
 823   {"no-acls",          0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 824   {"no-A",             0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 825   {"xattrs",          'X', POPT_ARG_NONE,   0, 'X', 0, 0 },
 826   {"no-xattrs",        0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 827   {"no-X",             0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 828   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
 829   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 830   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 831   {"atimes",          'U', POPT_ARG_NONE,   0, 'U', 0, 0 },
 832   {"no-atimes",        0,  POPT_ARG_VAL,    &preserve_atimes, 0, 0, 0 },
 833   {"no-U",             0,  POPT_ARG_VAL,    &preserve_atimes, 0, 0, 0 },
 834   {"open-noatime",     0,  POPT_ARG_VAL,    &open_noatime, 1, 0, 0 },
 835   {"no-open-noatime",  0,  POPT_ARG_VAL,    &open_noatime, 0, 0, 0 },
 836   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 1, 0, 0 },
 837   {"no-omit-dir-times",0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 838   {"no-O",             0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 839   {"omit-link-times", 'J', POPT_ARG_VAL,    &omit_link_times, 1, 0, 0 },
 840   {"no-omit-link-times",0, POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 841   {"no-J",             0,  POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 842   {"modify-window",   '@', POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
 843   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
 844   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
 845   {"fake-super",       0,  POPT_ARG_VAL,    &am_root, -1, 0, 0 },
 846   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
 847   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 848   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 849   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
 850   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 851   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 852   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
 853   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
 854   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
 855   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
 856   {"write-devices",    0,  POPT_ARG_VAL,    &write_devices, 1, 0, 0 },
 857   {"no-write-devices", 0,  POPT_ARG_VAL,    &write_devices, 0, 0, 0 },
 858   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
 859   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
 860   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
 861   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 862   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 863   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
 864   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
 865   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
 866   {"munge-links",      0,  POPT_ARG_VAL,    &munge_symlinks, 1, 0, 0 },
 867   {"no-munge-links",   0,  POPT_ARG_VAL,    &munge_symlinks, 0, 0, 0 },
 868   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
 869   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
 870   {"hard-links",      'H', POPT_ARG_NONE,   0, 'H', 0, 0 },
 871   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 872   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 873   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
 874   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 875   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 876   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 877   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 878   {"i-d",              0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 879   {"no-i-d",           0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 880   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
 881   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
 882   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
 883   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
 884   {"no-one-file-system",0, POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 885   {"no-x",             0,  POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 886   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
 887   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 888   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 889   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
 890   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
 891   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
 892   {"sparse",          'S', POPT_ARG_VAL,    &sparse_files, 1, 0, 0 },
 893   {"no-sparse",        0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 894   {"no-S",             0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 895   {"preallocate",      0,  POPT_ARG_NONE,   &preallocate_files, 0, 0, 0},
 896   {"inplace",          0,  POPT_ARG_VAL,    &inplace, 1, 0, 0 },
 897   {"no-inplace",       0,  POPT_ARG_VAL,    &inplace, 0, 0, 0 },
 898   {"append",           0,  POPT_ARG_NONE,   0, OPT_APPEND, 0, 0 },
 899   {"append-verify",    0,  POPT_ARG_VAL,    &append_mode, 2, 0, 0 },
 900   {"no-append",        0,  POPT_ARG_VAL,    &append_mode, 0, 0, 0 },
 901   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
 902   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
 903   {"delete-before",    0,  POPT_ARG_NONE,   &delete_before, 0, 0, 0 },
 904   {"delete-during",    0,  POPT_ARG_VAL,    &delete_during, 1, 0, 0 },
 905   {"delete-delay",     0,  POPT_ARG_VAL,    &delete_during, 2, 0, 0 },
 906   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
 907   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
 908   {"delete-missing-args",0,POPT_BIT_SET,    &missing_args, 2, 0, 0 },
 909   {"ignore-missing-args",0,POPT_BIT_SET,    &missing_args, 1, 0, 0 },
 910   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_source_files, 2, 0, 0 }, /* deprecated */
 911   {"remove-source-files",0,POPT_ARG_VAL,    &remove_source_files, 1, 0, 0 },
 912   {"force",            0,  POPT_ARG_VAL,    &force_delete, 1, 0, 0 },
 913   {"no-force",         0,  POPT_ARG_VAL,    &force_delete, 0, 0, 0 },
 914   {"ignore-errors",    0,  POPT_ARG_VAL,    &ignore_errors, 1, 0, 0 },
 915   {"no-ignore-errors", 0,  POPT_ARG_VAL,    &ignore_errors, 0, 0, 0 },
 916   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
 917   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
 918   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
 919   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
 920   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
 921   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
 922   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
 923   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
 924   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
 925   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 926   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 927   {"checksum",        'c', POPT_ARG_VAL,    &always_checksum, 1, 0, 0 },
 928   {"no-checksum",      0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 929   {"no-c",             0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 930   {"checksum-choice",  0,  POPT_ARG_STRING, &checksum_choice, 0, 0, 0 },
 931   {"cc",               0,  POPT_ARG_STRING, &checksum_choice, 0, 0, 0 },
 932   {"block-size",      'B', POPT_ARG_LONG,   &block_size, 0, 0, 0 },
 933   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
 934   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
 935   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
 936   {"fuzzy",           'y', POPT_ARG_NONE,   0, 'y', 0, 0 },
 937   {"no-fuzzy",         0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 938   {"no-y",             0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 939   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
 940   {"old-compress",     0,  POPT_ARG_NONE,   0, OPT_OLD_COMPRESS, 0, 0 },
 941   {"new-compress",     0,  POPT_ARG_NONE,   0, OPT_NEW_COMPRESS, 0, 0 },
 942   {"no-compress",      0,  POPT_ARG_NONE,   0, OPT_NO_COMPRESS, 0, 0 },
 943   {"no-z",             0,  POPT_ARG_NONE,   0, OPT_NO_COMPRESS, 0, 0 },
 944   {"compress-choice",  0,  POPT_ARG_STRING, &compress_choice, 0, 0, 0 },
 945   {"zc",               0,  POPT_ARG_STRING, &compress_choice, 0, 0, 0 },
 946   {"skip-compress",    0,  POPT_ARG_STRING, &skip_compress, 0, 0, 0 },
 947   {"compress-level",   0,  POPT_ARG_INT,    &do_compression_level, 0, 0, 0 },
 948   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
 949   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
 950   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
 951   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
 952   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
 953   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
 954   {"delay-updates",    0,  POPT_ARG_VAL,    &delay_updates, 1, 0, 0 },
 955   {"no-delay-updates", 0,  POPT_ARG_VAL,    &delay_updates, 0, 0, 0 },
 956   {"prune-empty-dirs",'m', POPT_ARG_VAL,    &prune_empty_dirs, 1, 0, 0 },
 957   {"no-prune-empty-dirs",0,POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
 958   {"no-m",             0,  POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
 959   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
 960   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
 961   {"out-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 },
 962   {"log-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 }, /* DEPRECATED */
 963   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
 964   {"no-itemize-changes",0, POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
 965   {"no-i",             0,  POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
 966   {"bwlimit",          0,  POPT_ARG_STRING, &bwlimit_arg, OPT_BWLIMIT, 0, 0 },
 967   {"no-bwlimit",       0,  POPT_ARG_VAL,    &bwlimit, 0, 0, 0 },
 968   {"backup",          'b', POPT_ARG_VAL,    &make_backups, 1, 0, 0 },
 969   {"no-backup",        0,  POPT_ARG_VAL,    &make_backups, 0, 0, 0 },
 970   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
 971   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
 972   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
 973   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
 974   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
 975   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
 976   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
 977   {"from0",           '0', POPT_ARG_VAL,    &eol_nulls, 1, 0, 0},
 978   {"no-from0",         0,  POPT_ARG_VAL,    &eol_nulls, 0, 0, 0},
 979   {"protect-args",    's', POPT_ARG_VAL,    &protect_args, 1, 0, 0},
 980   {"no-protect-args",  0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
 981   {"no-s",             0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
 982   {"numeric-ids",      0,  POPT_ARG_VAL,    &numeric_ids, 1, 0, 0 },
 983   {"no-numeric-ids",   0,  POPT_ARG_VAL,    &numeric_ids, 0, 0, 0 },
 984   {"usermap",          0,  POPT_ARG_STRING, 0, OPT_USERMAP, 0, 0 },
 985   {"groupmap",         0,  POPT_ARG_STRING, 0, OPT_GROUPMAP, 0, 0 },
 986   {"chown",            0,  POPT_ARG_STRING, 0, OPT_CHOWN, 0, 0 },
 987   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
 988   {"no-timeout",       0,  POPT_ARG_VAL,    &io_timeout, 0, 0, 0 },
 989   {"contimeout",       0,  POPT_ARG_INT,    &connect_timeout, 0, 0, 0 },
 990   {"no-contimeout",    0,  POPT_ARG_VAL,    &connect_timeout, 0, 0, 0 },
 991   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
 992   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
 993   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
 994   {"iconv",            0,  POPT_ARG_STRING, &iconv_opt, 0, 0, 0 },
 995   {"no-iconv",         0,  POPT_ARG_NONE,   0, OPT_NO_ICONV, 0, 0 },
 996   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
 997   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
 998   {"8-bit-output",    '8', POPT_ARG_VAL,    &allow_8bit_chars, 1, 0, 0 },
 999   {"no-8-bit-output",  0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1000   {"no-8",             0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1001   {"qsort",            0,  POPT_ARG_NONE,   &use_qsort, 0, 0, 0 },
1002   {"copy-as",          0,  POPT_ARG_STRING, &copy_as, 0, 0, 0 },
1003   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1004   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1005   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1006   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
1007   {"early-input",      0,  POPT_ARG_STRING, &early_input_file, 0, 0, 0 },
1008   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
1009   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
1010   {"outbuf",           0,  POPT_ARG_STRING, &outbuf_mode, 0, 0, 0 },
1011   {"remote-option",   'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1012   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1013   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
1014   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
1015   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
1016   /* All the following options switch us into daemon-mode option-parsing. */
1017   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1018   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1019   {"dparam",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1020   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1021   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1022   {0,0,0,0, 0, 0, 0}
1023 };
1024
1025 static void daemon_usage(enum logcode F)
1026 {
1027   print_rsync_version(F);
1028
1029   rprintf(F,"\n");
1030   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
1031 #include "help-rsyncd.h"
1032   rprintf(F,"\n");
1033   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
1034   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
1035 }
1036
1037 static struct poptOption long_daemon_options[] = {
1038   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
1039   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1040   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
1041   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
1042   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
1043   {"dparam",          'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1044   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1045   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1046   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
1047   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
1048   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
1049   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
1050   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1051   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1052   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1053   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
1054   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1055   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
1056   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1057   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1058   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
1059   {0,0,0,0, 0, 0, 0}
1060 };
1061
1062
1063 static char err_buf[200];
1064
1065
1066 /**
1067  * Store the option error message, if any, so that we can log the
1068  * connection attempt (which requires parsing the options), and then
1069  * show the error later on.
1070  **/
1071 void option_error(void)
1072 {
1073         if (!err_buf[0]) {
1074                 strlcpy(err_buf, "Error parsing options: option may "
1075                         "be supported on client but not on server?\n",
1076                         sizeof err_buf);
1077         }
1078
1079         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
1080         io_flush(MSG_FLUSH);
1081         msleep(20);
1082 }
1083
1084
1085 static void parse_one_refuse_match(int negated, const char *ref, const struct poptOption *list_end)
1086 {
1087         struct poptOption *op;
1088         char shortName[2];
1089         int is_wild = strpbrk(ref, "*?[") != NULL;
1090         int found_match = 0;
1091
1092         shortName[1] = '\0';
1093
1094         if (strcmp("a", ref) == 0 || strcmp("archive", ref) == 0) {
1095                 ref = "[ardlptgoD]";
1096                 is_wild = 1;
1097         }
1098
1099         for (op = long_options; op != list_end; op++) {
1100                 *shortName = op->shortName;
1101                 if ((op->longName && wildmatch(ref, op->longName))
1102                  || (*shortName && wildmatch(ref, shortName))) {
1103                         if (op->descrip[1] == '*')
1104                                 op->descrip = negated ? "a*" : "r*";
1105                         else if (!is_wild)
1106                                 op->descrip = negated ? "a=" : "r=";
1107                         found_match = 1;
1108                         if (!is_wild)
1109                                 break;
1110                 }
1111         }
1112
1113         if (!found_match)
1114                 rprintf(FLOG, "No match for refuse-options string \"%s\"\n", ref);
1115 }
1116
1117
1118 /**
1119  * Tweak the option table to disable all options that the rsyncd.conf
1120  * file has told us to refuse.
1121  **/
1122 static void set_refuse_options(void)
1123 {
1124         struct poptOption *op, *list_end = NULL;
1125         char *cp, *ref = lp_refuse_options(module_id);
1126         int negated;
1127
1128         if (!ref)
1129                 ref = "";
1130
1131         if (!am_daemon)
1132                 ref = "";
1133
1134         /* We abuse the descrip field in poptOption to make it easy to flag which options
1135          * are refused (since we don't use it otherwise).  Start by marking all options
1136          * as "a"ccepted with a few options also marked as non-wild. */
1137         for (op = long_options; ; op++) {
1138                 const char *longName = op->longName ? op->longName : "";
1139                 if (!op->longName && !op->shortName) {
1140                         list_end = op;
1141                         break;
1142                 }
1143                 if (!am_daemon
1144                  || op->shortName == 'e' /* Required for compatibility flags */
1145                  || op->shortName == '0' /* --from0 just modifies --files-from, so refuse that instead (or not) */
1146                  || op->shortName == 's' /* --protect-args is always OK */
1147                  || op->shortName == 'n' /* --dry-run is always OK */
1148                  || strcmp("iconv", longName) == 0
1149                  || strcmp("no-iconv", longName) == 0
1150                  || strcmp("checksum-seed", longName) == 0
1151                  || strcmp("write-devices", longName) == 0 /* disable wild-match (it gets refused below) */
1152                  || strcmp("log-format", longName) == 0 /* aka out-format (NOT log-file-format) */
1153                  || strcmp("sender", longName) == 0
1154                  || strcmp("server", longName) == 0)
1155                         op->descrip = "a="; /* exact-match only */
1156                 else
1157                         op->descrip = "a*"; /* wild-card-able */
1158         }
1159         assert(list_end != NULL);
1160
1161         if (am_daemon) { /* Refused by default, but can be accepted via a negated exact match. */
1162                 parse_one_refuse_match(0, "write-devices", list_end);
1163         }
1164
1165         while (1) {
1166                 while (*ref == ' ') ref++;
1167                 if (!*ref)
1168                         break;
1169                 if ((cp = strchr(ref, ' ')) != NULL)
1170                         *cp = '\0';
1171                 negated = *ref == '!';
1172                 if (negated && ref[1])
1173                         ref++;
1174                 parse_one_refuse_match(negated, ref, list_end);
1175                 if (!cp)
1176                         break;
1177                 *cp = ' ';
1178                 ref = cp + 1;
1179         }
1180
1181         if (am_daemon) {
1182 #ifdef ICONV_OPTION
1183                 if (!*lp_charset(module_id))
1184                         parse_one_refuse_match(0, "iconv", list_end);
1185 #endif
1186                 parse_one_refuse_match(0, "log-file*", list_end);
1187         }
1188
1189 #ifndef SUPPORT_ATIMES
1190         parse_one_refuse_match(0, "atimes", list_end);
1191 #endif
1192 #ifndef SUPPORT_HARD_LINKS
1193         parse_one_refuse_match(0, "link-dest", list_end);
1194 #endif
1195 #ifndef ICONV_OPTION
1196         parse_one_refuse_match(0, "iconv", list_end);
1197 #endif
1198 #ifndef HAVE_SETVBUF
1199         parse_one_refuse_match(0, "outbuf", list_end);
1200 #endif
1201
1202         /* Now we use the descrip values to actually mark the options for refusal. */
1203         for (op = long_options; op != list_end; op++) {
1204                 int refused = op->descrip[0] == 'r';
1205                 op->descrip = NULL;
1206                 if (!refused)
1207                         continue;
1208                 if (op->argInfo == POPT_ARG_VAL)
1209                         op->argInfo = POPT_ARG_NONE;
1210                 op->val = (op - long_options) + OPT_REFUSED_BASE;
1211                 /* The following flags are set to let us easily check an implied option later in the code. */
1212                 switch (op->shortName) {
1213                 case 'r': case 'd': case 'l': case 'p':
1214                 case 't': case 'g': case 'o': case 'D':
1215                         refused_archive_part = op->val;
1216                         break;
1217                 case 'z':
1218                         refused_compress = op->val;
1219                         break;
1220                 case '\0':
1221                         if (strcmp("delete", op->longName) == 0)
1222                                 refused_delete = op->val;
1223                         else if (strcmp("delete-before", op->longName) == 0)
1224                                 refused_delete_before = op->val;
1225                         else if (strcmp("delete-during", op->longName) == 0)
1226                                 refused_delete_during = op->val;
1227                         else if (strcmp("partial", op->longName) == 0)
1228                                 refused_partial = op->val;
1229                         else if (strcmp("progress", op->longName) == 0)
1230                                 refused_progress = op->val;
1231                         else if (strcmp("inplace", op->longName) == 0)
1232                                 refused_inplace = op->val;
1233                         else if (strcmp("no-iconv", op->longName) == 0)
1234                                 refused_no_iconv = op->val;
1235                         break;
1236                 }
1237         }
1238 }
1239
1240
1241 static int count_args(const char **argv)
1242 {
1243         int i = 0;
1244
1245         if (argv) {
1246                 while (argv[i] != NULL)
1247                         i++;
1248         }
1249
1250         return i;
1251 }
1252
1253
1254 static OFF_T parse_size_arg(char **size_arg, char def_suf)
1255 {
1256         int reps, mult, make_compatible = 0;
1257         const char *arg;
1258         OFF_T size = 1;
1259
1260         for (arg = *size_arg; isDigit(arg); arg++) {}
1261         if (*arg == '.')
1262                 for (arg++; isDigit(arg); arg++) {}
1263         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
1264         case 'b': case 'B':
1265                 reps = 0;
1266                 break;
1267         case 'k': case 'K':
1268                 reps = 1;
1269                 break;
1270         case 'm': case 'M':
1271                 reps = 2;
1272                 break;
1273         case 'g': case 'G':
1274                 reps = 3;
1275                 break;
1276         default:
1277                 return -1;
1278         }
1279         if (*arg == 'b' || *arg == 'B')
1280                 mult = 1000, make_compatible = 1, arg++;
1281         else if (!*arg || *arg == '+' || *arg == '-')
1282                 mult = 1024;
1283         else if (strncasecmp(arg, "ib", 2) == 0)
1284                 mult = 1024, arg += 2;
1285         else
1286                 return -1;
1287         while (reps--)
1288                 size *= mult;
1289         size *= atof(*size_arg);
1290         if ((*arg == '+' || *arg == '-') && arg[1] == '1')
1291                 size += atoi(arg), make_compatible = 1, arg += 2;
1292         if (*arg)
1293                 return -1;
1294         if (size > 0 && make_compatible && def_suf == 'b') {
1295                 /* We convert this manually because we may need %lld precision,
1296                  * and that's not a portable sprintf() escape. */
1297                 char buf[128], *s = buf + sizeof buf - 1;
1298                 OFF_T num = size;
1299                 *s = '\0';
1300                 while (num) {
1301                         *--s = (char)(num % 10) + '0';
1302                         num /= 10;
1303                 }
1304                 if (!(*size_arg = strdup(s)))
1305                         out_of_memory("parse_size_arg");
1306         }
1307         return size;
1308 }
1309
1310
1311 static void create_refuse_error(int which)
1312 {
1313         const char *msg;
1314         if (am_daemon)
1315                 msg = "The server is configured to refuse";
1316         else if (am_server)
1317                 msg = "The server does not support";
1318         else
1319                 msg = "This rsync does not support";
1320
1321         /* The "which" value is the index + OPT_REFUSED_BASE. */
1322         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
1323         int n = snprintf(err_buf, sizeof err_buf, "%s --%s\n", msg, op->longName) - 1;
1324         if (op->shortName)
1325                 snprintf(err_buf + n, sizeof err_buf - n, " (-%c)\n", op->shortName);
1326 }
1327
1328 /* This is used to make sure that --daemon & --server cannot be aliased to
1329  * something else. These options have always disabled popt aliases for the
1330  * parsing of a daemon or server command-line, but we have to make sure that
1331  * these options cannot vanish so that the alias disabling can take effect. */
1332 static void popt_unalias(poptContext con, const char *opt)
1333 {
1334         struct poptAlias unalias;
1335
1336         memset(&unalias, 0, sizeof unalias);
1337
1338         unalias.longName = opt + 2; /* point past the leading "--" */
1339         unalias.argc = 1;
1340         unalias.argv = new_array0(const char*, 2);
1341         unalias.argv[0] = strdup(opt);
1342
1343         poptAddAlias(con, unalias, 0);
1344 }
1345
1346 char *alt_dest_opt(int type)
1347 {
1348         if (!type)
1349                 type = alt_dest_type;
1350
1351         switch (type) {
1352         case COMPARE_DEST:
1353                 return "--compare-dest";
1354         case COPY_DEST:
1355                 return "--copy-dest";
1356         case LINK_DEST:
1357                 return "--link-dest";
1358         default:
1359                 assert(0);
1360         }
1361 }
1362
1363 /**
1364  * Process command line arguments.  Called on both local and remote.
1365  *
1366  * @retval 1 if all options are OK; with globals set to appropriate
1367  * values
1368  *
1369  * @retval 0 on error, with err_buf containing an explanation
1370  **/
1371 int parse_arguments(int *argc_p, const char ***argv_p)
1372 {
1373         static poptContext pc;
1374         const char *arg, **argv = *argv_p;
1375         int argc = *argc_p;
1376         int opt, want_dest_type;
1377         int orig_protect_args = protect_args;
1378
1379         if (argc == 0) {
1380                 strlcpy(err_buf, "argc is zero!\n", sizeof err_buf);
1381                 return 0;
1382         }
1383
1384         set_refuse_options();
1385
1386 #ifdef ICONV_OPTION
1387         if (!am_daemon && protect_args <= 0 && (arg = getenv("RSYNC_ICONV")) != NULL && *arg)
1388                 iconv_opt = strdup(arg);
1389 #endif
1390
1391         /* TODO: Call poptReadDefaultConfig; handle errors. */
1392
1393         /* The context leaks in case of an error, but if there's a
1394          * problem we always exit anyhow. */
1395         if (pc)
1396                 poptFreeContext(pc);
1397         pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1398         if (!am_server) {
1399                 poptReadDefaultConfig(pc, 0);
1400                 popt_unalias(pc, "--daemon");
1401                 popt_unalias(pc, "--server");
1402         }
1403
1404         while ((opt = poptGetNextOpt(pc)) != -1) {
1405                 /* most options are handled automatically by popt;
1406                  * only special cases are returned and listed here. */
1407
1408                 switch (opt) {
1409                 case 'V':
1410                         version_opt_cnt++;
1411                         break;
1412
1413                 case OPT_SERVER:
1414                         if (!am_server) {
1415                                 /* Disable popt aliases on the server side and
1416                                  * then start parsing the options again. */
1417                                 poptFreeContext(pc);
1418                                 pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1419                                 am_server = 1;
1420                         }
1421 #ifdef ICONV_OPTION
1422                         iconv_opt = NULL;
1423 #endif
1424                         break;
1425
1426                 case OPT_SENDER:
1427                         if (!am_server) {
1428                                 usage(FERROR);
1429                                 exit_cleanup(RERR_SYNTAX);
1430                         }
1431                         am_sender = 1;
1432                         break;
1433
1434                 case OPT_DAEMON:
1435                         if (am_daemon) {
1436                                 strlcpy(err_buf,
1437                                         "Attempt to hack rsync thwarted!\n",
1438                                         sizeof err_buf);
1439                                 return 0;
1440                         }
1441 #ifdef ICONV_OPTION
1442                         iconv_opt = NULL;
1443 #endif
1444                         protect_args = 0;
1445                         poptFreeContext(pc);
1446                         pc = poptGetContext(RSYNC_NAME, argc, argv, long_daemon_options, 0);
1447                         while ((opt = poptGetNextOpt(pc)) != -1) {
1448                                 char **cpp;
1449                                 switch (opt) {
1450                                 case 'h':
1451                                         daemon_usage(FINFO);
1452                                         exit_cleanup(0);
1453
1454                                 case 'M':
1455                                         arg = poptGetOptArg(pc);
1456                                         if (!strchr(arg, '=')) {
1457                                                 rprintf(FERROR,
1458                                                         "--dparam value is missing an '=': %s\n",
1459                                                         arg);
1460                                                 goto daemon_error;
1461                                         }
1462                                         cpp = EXPAND_ITEM_LIST(&dparam_list, char *, 4);
1463                                         *cpp = strdup(arg);
1464                                         break;
1465
1466                                 case 'v':
1467                                         verbose++;
1468                                         break;
1469
1470                                 default:
1471                                         rprintf(FERROR,
1472                                                 "rsync: %s: %s (in daemon mode)\n",
1473                                                 poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1474                                                 poptStrerror(opt));
1475                                         goto daemon_error;
1476                                 }
1477                         }
1478
1479                         if (dparam_list.count && !set_dparams(1))
1480                                 exit_cleanup(RERR_SYNTAX);
1481
1482                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1483                                 snprintf(err_buf, sizeof err_buf,
1484                                          "the --temp-dir path is WAY too long.\n");
1485                                 return 0;
1486                         }
1487
1488                         if (!daemon_opt) {
1489                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
1490                             daemon_error:
1491                                 rprintf(FERROR, "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
1492                                 exit_cleanup(RERR_SYNTAX);
1493                         }
1494
1495                         *argv_p = argv = poptGetArgs(pc);
1496                         *argc_p = argc = count_args(argv);
1497                         am_starting_up = 0;
1498                         daemon_opt = 0;
1499                         am_daemon = 1;
1500                         return 1;
1501
1502                 case OPT_MODIFY_WINDOW:
1503                         /* The value has already been set by popt, but
1504                          * we need to remember that we're using a
1505                          * non-default setting. */
1506                         modify_window_set = 1;
1507                         break;
1508
1509                 case OPT_FILTER:
1510                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1511                                         rule_template(0), 0);
1512                         break;
1513
1514                 case OPT_EXCLUDE:
1515                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1516                                         rule_template(0), XFLG_OLD_PREFIXES);
1517                         break;
1518
1519                 case OPT_INCLUDE:
1520                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1521                                         rule_template(FILTRULE_INCLUDE), XFLG_OLD_PREFIXES);
1522                         break;
1523
1524                 case OPT_EXCLUDE_FROM:
1525                 case OPT_INCLUDE_FROM:
1526                         arg = poptGetOptArg(pc);
1527                         if (sanitize_paths)
1528                                 arg = sanitize_path(NULL, arg, NULL, 0, SP_DEFAULT);
1529                         if (daemon_filter_list.head) {
1530                                 int rej;
1531                                 char *cp = strdup(arg);
1532                                 if (!cp)
1533                                         out_of_memory("parse_arguments");
1534                                 if (!*cp)
1535                                         rej = 1;
1536                                 else {
1537                                         char *dir = cp + (*cp == '/' ? module_dirlen : 0);
1538                                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1539                                         rej = check_filter(&daemon_filter_list, FLOG, dir, 0) < 0;
1540                                 }
1541                                 free(cp);
1542                                 if (rej)
1543                                         goto options_rejected;
1544                         }
1545                         parse_filter_file(&filter_list, arg,
1546                                 rule_template(opt == OPT_INCLUDE_FROM ? FILTRULE_INCLUDE : 0),
1547                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
1548                         break;
1549
1550                 case 'a':
1551                         if (refused_archive_part) {
1552                                 create_refuse_error(refused_archive_part);
1553                                 return 0;
1554                         }
1555                         if (!recurse) /* preserve recurse == 2 */
1556                                 recurse = 1;
1557 #ifdef SUPPORT_LINKS
1558                         preserve_links = 1;
1559 #endif
1560                         preserve_perms = 1;
1561                         preserve_times = 1;
1562                         preserve_gid = 1;
1563                         preserve_uid = 1;
1564                         preserve_devices = 1;
1565                         preserve_specials = 1;
1566                         break;
1567
1568                 case 'D':
1569                         preserve_devices = preserve_specials = 1;
1570                         break;
1571
1572                 case OPT_NO_D:
1573                         preserve_devices = preserve_specials = 0;
1574                         break;
1575
1576                 case 'h':
1577                         human_readable++;
1578                         break;
1579
1580                 case 'H':
1581                         preserve_hard_links++;
1582                         break;
1583
1584                 case 'i':
1585                         itemize_changes++;
1586                         break;
1587
1588                 case 'U':
1589                         if (++preserve_atimes > 1)
1590                                 open_noatime = 1;
1591                         break;
1592
1593                 case 'v':
1594                         verbose++;
1595                         break;
1596
1597                 case 'y':
1598                         fuzzy_basis++;
1599                         break;
1600
1601                 case 'q':
1602                         quiet++;
1603                         break;
1604
1605                 case 'x':
1606                         one_file_system++;
1607                         break;
1608
1609                 case 'F':
1610                         switch (++F_option_cnt) {
1611                         case 1:
1612                                 parse_filter_str(&filter_list,": /.rsync-filter",rule_template(0),0);
1613                                 break;
1614                         case 2:
1615                                 parse_filter_str(&filter_list,"- .rsync-filter",rule_template(0),0);
1616                                 break;
1617                         }
1618                         break;
1619
1620                 case 'P':
1621                         if (refused_partial || refused_progress) {
1622                                 create_refuse_error(refused_partial ? refused_partial : refused_progress);
1623                                 return 0;
1624                         }
1625                         do_progress = 1;
1626                         keep_partial = 1;
1627                         break;
1628
1629                 case 'z':
1630                         do_compression++;
1631                         break;
1632
1633                 case OPT_OLD_COMPRESS:
1634                         compress_choice = "zlib";
1635                         break;
1636
1637                 case OPT_NEW_COMPRESS:
1638                         compress_choice = "zlibx";
1639                         break;
1640
1641                 case OPT_NO_COMPRESS:
1642                         do_compression = 0;
1643                         compress_choice = NULL;
1644                         break;
1645
1646                 case 'M':
1647                         arg = poptGetOptArg(pc);
1648                         if (*arg != '-') {
1649                                 snprintf(err_buf, sizeof err_buf,
1650                                         "Remote option must start with a dash: %s\n", arg);
1651                                 return 0;
1652                         }
1653                         if (remote_option_cnt+2 >= remote_option_alloc) {
1654                                 remote_option_alloc += 16;
1655                                 remote_options = realloc_array(remote_options,
1656                                                         const char *, remote_option_alloc);
1657                                 if (!remote_options)
1658                                         out_of_memory("parse_arguments");
1659                                 if (!remote_option_cnt)
1660                                         remote_options[0] = "ARG0";
1661                         }
1662                         remote_options[++remote_option_cnt] = arg;
1663                         remote_options[remote_option_cnt+1] = NULL;
1664                         break;
1665
1666                 case OPT_WRITE_BATCH:
1667                         /* batch_name is already set */
1668                         write_batch = 1;
1669                         break;
1670
1671                 case OPT_ONLY_WRITE_BATCH:
1672                         /* batch_name is already set */
1673                         write_batch = -1;
1674                         break;
1675
1676                 case OPT_READ_BATCH:
1677                         /* batch_name is already set */
1678                         read_batch = 1;
1679                         break;
1680
1681                 case OPT_NO_ICONV:
1682 #ifdef ICONV_OPTION
1683                         iconv_opt = NULL;
1684 #endif
1685                         break;
1686
1687                 case OPT_MAX_SIZE:
1688                         if ((max_size = parse_size_arg(&max_size_arg, 'b')) < 0) {
1689                                 snprintf(err_buf, sizeof err_buf,
1690                                         "--max-size value is invalid: %s\n",
1691                                         max_size_arg);
1692                                 return 0;
1693                         }
1694                         break;
1695
1696                 case OPT_MIN_SIZE:
1697                         if ((min_size = parse_size_arg(&min_size_arg, 'b')) < 0) {
1698                                 snprintf(err_buf, sizeof err_buf,
1699                                         "--min-size value is invalid: %s\n",
1700                                         min_size_arg);
1701                                 return 0;
1702                         }
1703                         break;
1704
1705                 case OPT_BWLIMIT:
1706                         {
1707                                 OFF_T limit = parse_size_arg(&bwlimit_arg, 'K');
1708                                 if (limit < 0) {
1709                                         snprintf(err_buf, sizeof err_buf,
1710                                                 "--bwlimit value is invalid: %s\n", bwlimit_arg);
1711                                         return 0;
1712                                 }
1713                                 bwlimit = (limit + 512) / 1024;
1714                                 if (limit && !bwlimit) {
1715                                         snprintf(err_buf, sizeof err_buf,
1716                                                 "--bwlimit value is too small: %s\n", bwlimit_arg);
1717                                         return 0;
1718                                 }
1719                         }
1720                         break;
1721
1722                 case OPT_APPEND:
1723                         if (am_server)
1724                                 append_mode++;
1725                         else
1726                                 append_mode = 1;
1727                         break;
1728
1729                 case OPT_LINK_DEST:
1730                         want_dest_type = LINK_DEST;
1731                         goto set_dest_dir;
1732
1733                 case OPT_COPY_DEST:
1734                         want_dest_type = COPY_DEST;
1735                         goto set_dest_dir;
1736
1737                 case OPT_COMPARE_DEST:
1738                         want_dest_type = COMPARE_DEST;
1739
1740                 set_dest_dir:
1741                         if (alt_dest_type && alt_dest_type != want_dest_type) {
1742                                 snprintf(err_buf, sizeof err_buf,
1743                                         "ERROR: the %s option conflicts with the %s option\n",
1744                                         alt_dest_opt(want_dest_type), alt_dest_opt(0));
1745                                 return 0;
1746                         }
1747                         alt_dest_type = want_dest_type;
1748
1749                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1750                                 snprintf(err_buf, sizeof err_buf,
1751                                         "ERROR: at most %d %s args may be specified\n",
1752                                         MAX_BASIS_DIRS, alt_dest_opt(0));
1753                                 return 0;
1754                         }
1755                         /* We defer sanitizing this arg until we know what
1756                          * our destination directory is going to be. */
1757                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1758                         break;
1759
1760                 case OPT_CHMOD:
1761                         arg = poptGetOptArg(pc);
1762                         if (!parse_chmod(arg, &chmod_modes)) {
1763                                 snprintf(err_buf, sizeof err_buf,
1764                                         "Invalid argument passed to --chmod (%s)\n",
1765                                         arg);
1766                                 return 0;
1767                         }
1768                         break;
1769
1770                 case OPT_INFO:
1771                         arg = poptGetOptArg(pc);
1772                         parse_output_words(info_words, info_levels, arg, USER_PRIORITY);
1773                         break;
1774
1775                 case OPT_DEBUG:
1776                         arg = poptGetOptArg(pc);
1777                         parse_output_words(debug_words, debug_levels, arg, USER_PRIORITY);
1778                         break;
1779
1780                 case OPT_USERMAP:
1781                         if (usermap) {
1782                                 if (usermap_via_chown) {
1783                                         snprintf(err_buf, sizeof err_buf,
1784                                                 "--usermap conflicts with prior --chown.\n");
1785                                         return 0;
1786                                 }
1787                                 snprintf(err_buf, sizeof err_buf,
1788                                         "You can only specify --usermap once.\n");
1789                                 return 0;
1790                         }
1791                         usermap = (char *)poptGetOptArg(pc);
1792                         usermap_via_chown = False;
1793                         break;
1794
1795                 case OPT_GROUPMAP:
1796                         if (groupmap) {
1797                                 if (groupmap_via_chown) {
1798                                         snprintf(err_buf, sizeof err_buf,
1799                                                 "--groupmap conflicts with prior --chown.\n");
1800                                         return 0;
1801                                 }
1802                                 snprintf(err_buf, sizeof err_buf,
1803                                         "You can only specify --groupmap once.\n");
1804                                 return 0;
1805                         }
1806                         groupmap = (char *)poptGetOptArg(pc);
1807                         groupmap_via_chown = False;
1808                         break;
1809
1810                 case OPT_CHOWN: {
1811                         const char *chown = poptGetOptArg(pc);
1812                         int len;
1813                         if ((arg = strchr(chown, ':')) != NULL)
1814                                 len = arg++ - chown;
1815                         else
1816                                 len = strlen(chown);
1817                         if (len) {
1818                                 if (usermap) {
1819                                         if (!usermap_via_chown) {
1820                                                 snprintf(err_buf, sizeof err_buf,
1821                                                         "--chown conflicts with prior --usermap.\n");
1822                                                 return 0;
1823                                         }
1824                                         snprintf(err_buf, sizeof err_buf,
1825                                                 "You can only specify a user-affecting --chown once.\n");
1826                                         return 0;
1827                                 }
1828                                 if (asprintf(&usermap, "*:%.*s", len, chown) < 0)
1829                                         out_of_memory("parse_arguments");
1830                                 usermap_via_chown = True;
1831                         }
1832                         if (arg && *arg) {
1833                                 if (groupmap) {
1834                                         if (!groupmap_via_chown) {
1835                                                 snprintf(err_buf, sizeof err_buf,
1836                                                         "--chown conflicts with prior --groupmap.\n");
1837                                                 return 0;
1838                                         }
1839                                         snprintf(err_buf, sizeof err_buf,
1840                                                 "You can only specify a group-affecting --chown once.\n");
1841                                         return 0;
1842                                 }
1843                                 if (asprintf(&groupmap, "*:%s", arg) < 0)
1844                                         out_of_memory("parse_arguments");
1845                                 groupmap_via_chown = True;
1846                         }
1847                         break;
1848                 }
1849
1850                 case OPT_HELP:
1851                         usage(FINFO);
1852                         exit_cleanup(0);
1853
1854                 case 'A':
1855 #ifdef SUPPORT_ACLS
1856                         preserve_acls = 1;
1857                         preserve_perms = 1;
1858                         break;
1859 #else
1860                         /* FIXME: this should probably be ignored with a
1861                          * warning and then countermeasures taken to
1862                          * restrict group and other access in the presence
1863                          * of any more restrictive ACLs, but this is safe
1864                          * for now */
1865                         snprintf(err_buf,sizeof(err_buf),
1866                                  "ACLs are not supported on this %s\n",
1867                                  am_server ? "server" : "client");
1868                         return 0;
1869 #endif
1870
1871                 case 'X':
1872 #ifdef SUPPORT_XATTRS
1873                         preserve_xattrs++;
1874                         break;
1875 #else
1876                         snprintf(err_buf,sizeof(err_buf),
1877                                  "extended attributes are not supported on this %s\n",
1878                                  am_server ? "server" : "client");
1879                         return 0;
1880 #endif
1881
1882                 default:
1883                         /* A large opt value means that set_refuse_options()
1884                          * turned this option off. */
1885                         if (opt >= OPT_REFUSED_BASE) {
1886                                 create_refuse_error(opt);
1887                                 return 0;
1888                         }
1889                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
1890                                  am_server ? "on remote machine: " : "",
1891                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1892                                  poptStrerror(opt));
1893                         return 0;
1894                 }
1895         }
1896
1897         if (version_opt_cnt) {
1898                 print_rsync_version(FINFO);
1899                 exit_cleanup(0);
1900         }
1901
1902         if (protect_args < 0) {
1903                 if (am_server)
1904                         protect_args = 0;
1905                 else if ((arg = getenv("RSYNC_PROTECT_ARGS")) != NULL && *arg)
1906                         protect_args = atoi(arg) ? 1 : 0;
1907                 else {
1908 #ifdef RSYNC_USE_PROTECTED_ARGS
1909                         protect_args = 1;
1910 #else
1911                         protect_args = 0;
1912 #endif
1913                 }
1914         }
1915
1916         if (checksum_choice && strcasecmp(checksum_choice, "auto") != 0 && strcasecmp(checksum_choice, "auto,auto") != 0) {
1917                 /* Call this early to verify the args and figure out if we need to force
1918                  * --whole-file. Note that the parse function will get called again later,
1919                  * just in case an "auto" choice needs to know the protocol_version. */
1920                 parse_checksum_choice(0);
1921         } else
1922                 checksum_choice = NULL;
1923
1924         if (human_readable > 1 && argc == 2 && !am_server) {
1925                 /* Allow the old meaning of 'h' (--help) on its own. */
1926                 usage(FINFO);
1927                 exit_cleanup(0);
1928         }
1929
1930         if (!compress_choice && do_compression > 1)
1931                 compress_choice = "zlibx";
1932         if (compress_choice && strcasecmp(compress_choice, "auto") != 0)
1933                 parse_compress_choice(0); /* Twiddles do_compression and can possibly NULL-out compress_choice. */
1934         else
1935                 compress_choice = NULL;
1936
1937         if (do_compression || do_compression_level != CLVL_NOT_SPECIFIED) {
1938                 if (!do_compression)
1939                         do_compression = CPRES_AUTO;
1940                 if (do_compression && refused_compress) {
1941                         create_refuse_error(refused_compress);
1942                         return 0;
1943                 }
1944         }
1945
1946 #ifdef HAVE_SETVBUF
1947         if (outbuf_mode && !am_server) {
1948                 int mode = *(uchar *)outbuf_mode;
1949                 if (islower(mode))
1950                         mode = toupper(mode);
1951                 fflush(stdout); /* Just in case... */
1952                 switch (mode) {
1953                 case 'N': /* None */
1954                 case 'U': /* Unbuffered */
1955                         mode = _IONBF;
1956                         break;
1957                 case 'L': /* Line */
1958                         mode = _IOLBF;
1959                         break;
1960                 case 'B': /* Block */
1961                 case 'F': /* Full */
1962                         mode = _IOFBF;
1963                         break;
1964                 default:
1965                         snprintf(err_buf, sizeof err_buf,
1966                                 "Invalid --outbuf setting -- specify N, L, or B.\n");
1967                         return 0;
1968                 }
1969                 setvbuf(stdout, (char *)NULL, mode, 0);
1970         }
1971
1972         if (msgs2stderr) {
1973                 /* Make stderr line buffered for better sharing of the stream. */
1974                 fflush(stderr); /* Just in case... */
1975                 setvbuf(stderr, (char *)NULL, _IOLBF, 0);
1976         }
1977 #endif
1978
1979         set_output_verbosity(verbose, DEFAULT_PRIORITY);
1980
1981         if (do_stats) {
1982                 parse_output_words(info_words, info_levels,
1983                         verbose > 1 ? "stats3" : "stats2", DEFAULT_PRIORITY);
1984         }
1985
1986 #ifdef ICONV_OPTION
1987         if (iconv_opt && protect_args != 2) {
1988                 if (!am_server && strcmp(iconv_opt, "-") == 0)
1989                         iconv_opt = NULL;
1990                 else
1991                         need_unsorted_flist = 1;
1992         }
1993         if (refused_no_iconv && !iconv_opt) {
1994                 create_refuse_error(refused_no_iconv);
1995                 return 0;
1996         }
1997 #endif
1998
1999         if (fuzzy_basis > 1)
2000                 fuzzy_basis = basis_dir_cnt + 1;
2001
2002         /* Don't let the client reset protect_args if it was already processed */
2003         if (orig_protect_args == 2 && am_server)
2004                 protect_args = orig_protect_args;
2005
2006         if (protect_args == 1 && am_server)
2007                 return 1;
2008
2009         *argv_p = argv = poptGetArgs(pc);
2010         *argc_p = argc = count_args(argv);
2011
2012 #ifndef SUPPORT_LINKS
2013         if (preserve_links && !am_sender) {
2014                 snprintf(err_buf, sizeof err_buf,
2015                          "symlinks are not supported on this %s\n",
2016                          am_server ? "server" : "client");
2017                 return 0;
2018         }
2019 #endif
2020
2021 #ifndef SUPPORT_HARD_LINKS
2022         if (preserve_hard_links) {
2023                 snprintf(err_buf, sizeof err_buf,
2024                          "hard links are not supported on this %s\n",
2025                          am_server ? "server" : "client");
2026                 return 0;
2027         }
2028 #endif
2029
2030 #ifdef SUPPORT_XATTRS
2031         if (am_root < 0 && preserve_xattrs > 1) {
2032                 snprintf(err_buf, sizeof err_buf,
2033                          "--fake-super conflicts with -XX\n");
2034                 return 0;
2035         }
2036 #else
2037         if (am_root < 0) {
2038                 snprintf(err_buf, sizeof err_buf,
2039                          "--fake-super requires an rsync with extended attributes enabled\n");
2040                 return 0;
2041         }
2042 #endif
2043
2044         if (block_size) {
2045                 /* We may not know the real protocol_version at this point if this is the client
2046                  * option parsing, but we still want to check it so that the client can specify
2047                  * a --protocol=29 option with a larger block size. */
2048                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
2049
2050                 if (block_size > max_blength) {
2051                         snprintf(err_buf, sizeof err_buf,
2052                                  "--block-size=%lu is too large (max: %u)\n", block_size, max_blength);
2053                         return 0;
2054                 }
2055         }
2056
2057         if (write_batch && read_batch) {
2058                 snprintf(err_buf, sizeof err_buf,
2059                         "--write-batch and --read-batch can not be used together\n");
2060                 return 0;
2061         }
2062         if (write_batch > 0 || read_batch) {
2063                 if (am_server) {
2064                         rprintf(FINFO,
2065                                 "ignoring --%s-batch option sent to server\n",
2066                                 write_batch ? "write" : "read");
2067                         /* We don't actually exit_cleanup(), so that we can
2068                          * still service older version clients that still send
2069                          * batch args to server. */
2070                         read_batch = write_batch = 0;
2071                         batch_name = NULL;
2072                 } else if (dry_run)
2073                         write_batch = 0;
2074         } else if (write_batch < 0 && dry_run)
2075                 write_batch = 0;
2076         if (read_batch && files_from) {
2077                 snprintf(err_buf, sizeof err_buf,
2078                         "--read-batch cannot be used with --files-from\n");
2079                 return 0;
2080         }
2081         if (read_batch && remove_source_files) {
2082                 snprintf(err_buf, sizeof err_buf,
2083                         "--read-batch cannot be used with --remove-%s-files\n",
2084                         remove_source_files == 1 ? "source" : "sent");
2085                 return 0;
2086         }
2087         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
2088                 snprintf(err_buf, sizeof err_buf,
2089                         "the batch-file name must be %d characters or less.\n",
2090                         MAX_BATCH_NAME_LEN);
2091                 return 0;
2092         }
2093
2094         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
2095                 snprintf(err_buf, sizeof err_buf,
2096                          "the --temp-dir path is WAY too long.\n");
2097                 return 0;
2098         }
2099
2100         if (max_delete < 0 && max_delete != INT_MIN) {
2101                 /* Negative numbers are treated as "no deletions". */
2102                 max_delete = 0;
2103         }
2104
2105         if (files_from) {
2106                 if (recurse == 1) /* preserve recurse == 2 */
2107                         recurse = 0;
2108                 if (xfer_dirs < 0)
2109                         xfer_dirs = 1;
2110         }
2111
2112         if (argc < 2 && !read_batch && !am_server)
2113                 list_only |= 1;
2114
2115         if (xfer_dirs >= 4) {
2116                 parse_filter_str(&filter_list, "- /*/*", rule_template(0), 0);
2117                 recurse = xfer_dirs = 1;
2118         } else if (recurse)
2119                 xfer_dirs = 1;
2120         else if (xfer_dirs < 0)
2121                 xfer_dirs = list_only ? 1 : 0;
2122
2123         if (relative_paths < 0)
2124                 relative_paths = files_from? 1 : 0;
2125         if (!relative_paths)
2126                 implied_dirs = 0;
2127
2128         if (delete_before + !!delete_during + delete_after > 1) {
2129                 snprintf(err_buf, sizeof err_buf,
2130                         "You may not combine multiple --delete-WHEN options.\n");
2131                 return 0;
2132         }
2133         if (delete_before || delete_during || delete_after)
2134                 delete_mode = 1;
2135         else if (delete_mode || delete_excluded) {
2136                 /* Only choose now between before & during if one is refused. */
2137                 if (refused_delete_before) {
2138                         if (!refused_delete_during)
2139                                 delete_during = 1;
2140                         else {
2141                                 create_refuse_error(refused_delete_before);
2142                                 return 0;
2143                         }
2144                 } else if (refused_delete_during)
2145                         delete_before = 1;
2146                 delete_mode = 1;
2147         }
2148         if (!xfer_dirs && delete_mode) {
2149                 snprintf(err_buf, sizeof err_buf,
2150                         "--delete does not work without --recursive (-r) or --dirs (-d).\n");
2151                 return 0;
2152         }
2153
2154         if (missing_args == 3) /* simplify if both options were specified */
2155                 missing_args = 2;
2156         if (refused_delete && (delete_mode || missing_args == 2)) {
2157                 create_refuse_error(refused_delete);
2158                 return 0;
2159         }
2160
2161         if (remove_source_files) {
2162                 /* We only want to infer this refusal of --remove-source-files
2163                  * via the refusal of "delete", not any of the "delete-FOO"
2164                  * options. */
2165                 if (refused_delete && am_sender) {
2166                         create_refuse_error(refused_delete);
2167                         return 0;
2168                 }
2169                 need_messages_from_generator = 1;
2170         }
2171
2172         if (munge_symlinks && !am_daemon) {
2173                 STRUCT_STAT st;
2174                 char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */
2175                 strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */
2176                 if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) {
2177                         rprintf(FERROR, "Symlink munging is unsafe when a %s directory exists.\n",
2178                                 prefix);
2179                         exit_cleanup(RERR_UNSUPPORTED);
2180                 }
2181         }
2182
2183         if (sanitize_paths) {
2184                 int i;
2185                 for (i = argc; i-- > 0; )
2186                         argv[i] = sanitize_path(NULL, argv[i], "", 0, SP_KEEP_DOT_DIRS);
2187                 if (tmpdir)
2188                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, SP_DEFAULT);
2189                 if (backup_dir)
2190                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, SP_DEFAULT);
2191         }
2192         if (daemon_filter_list.head && !am_sender) {
2193                 filter_rule_list *elp = &daemon_filter_list;
2194                 if (tmpdir) {
2195                         char *dir;
2196                         if (!*tmpdir)
2197                                 goto options_rejected;
2198                         dir = tmpdir + (*tmpdir == '/' ? module_dirlen : 0);
2199                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2200                         if (check_filter(elp, FLOG, dir, 1) < 0)
2201                                 goto options_rejected;
2202                 }
2203                 if (backup_dir) {
2204                         char *dir;
2205                         if (!*backup_dir)
2206                                 goto options_rejected;
2207                         dir = backup_dir + (*backup_dir == '/' ? module_dirlen : 0);
2208                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2209                         if (check_filter(elp, FLOG, dir, 1) < 0)
2210                                 goto options_rejected;
2211                 }
2212         }
2213
2214         if (!backup_suffix)
2215                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
2216         backup_suffix_len = strlen(backup_suffix);
2217         if (strchr(backup_suffix, '/') != NULL) {
2218                 snprintf(err_buf, sizeof err_buf,
2219                         "--suffix cannot contain slashes: %s\n",
2220                         backup_suffix);
2221                 return 0;
2222         }
2223         if (backup_dir) {
2224                 size_t len;
2225                 make_backups = 1; /* --backup-dir implies --backup */
2226                 while (*backup_dir == '.' && backup_dir[1] == '/')
2227                         backup_dir += 2;
2228                 if (*backup_dir == '.' && backup_dir[1] == '\0')
2229                         backup_dir++;
2230                 len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
2231                 if (len > sizeof backup_dir_buf - 128) {
2232                         snprintf(err_buf, sizeof err_buf,
2233                                 "the --backup-dir path is WAY too long.\n");
2234                         return 0;
2235                 }
2236                 backup_dir_len = (int)len;
2237                 if (!backup_dir_len) {
2238                         backup_dir_len = -1;
2239                         backup_dir = NULL;
2240                 } else if (backup_dir_buf[backup_dir_len - 1] != '/') {
2241                         backup_dir_buf[backup_dir_len++] = '/';
2242                         backup_dir_buf[backup_dir_len] = '\0';
2243                 }
2244                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
2245         }
2246         if (backup_dir) {
2247                 /* No need for a suffix or a protect rule. */
2248         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
2249                 snprintf(err_buf, sizeof err_buf,
2250                         "--suffix cannot be empty %s\n", backup_dir_len < 0
2251                         ? "when --backup-dir is the same as the dest dir"
2252                         : "without a --backup-dir");
2253                 return 0;
2254         } else if (make_backups && delete_mode && !delete_excluded && !am_server) {
2255                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
2256                         "P *%s", backup_suffix);
2257                 parse_filter_str(&filter_list, backup_dir_buf, rule_template(0), 0);
2258         }
2259
2260         if (preserve_times) {
2261                 preserve_times = PRESERVE_FILE_TIMES;
2262                 if (!omit_dir_times)
2263                         preserve_times |= PRESERVE_DIR_TIMES;
2264 #ifdef CAN_SET_SYMLINK_TIMES
2265                 if (!omit_link_times)
2266                         preserve_times |= PRESERVE_LINK_TIMES;
2267 #endif
2268         }
2269
2270         if (make_backups && !backup_dir) {
2271                 omit_dir_times = 0; /* Implied, so avoid -O to sender. */
2272                 preserve_times &= ~PRESERVE_DIR_TIMES;
2273         }
2274
2275         if (stdout_format) {
2276                 if (am_server && log_format_has(stdout_format, 'I'))
2277                         stdout_format_has_i = 2;
2278                 else if (log_format_has(stdout_format, 'i'))
2279                         stdout_format_has_i = itemize_changes | 1;
2280                 if (!log_format_has(stdout_format, 'b')
2281                  && !log_format_has(stdout_format, 'c')
2282                  && !log_format_has(stdout_format, 'C'))
2283                         log_before_transfer = !am_server;
2284         } else if (itemize_changes) {
2285                 stdout_format = "%i %n%L";
2286                 stdout_format_has_i = itemize_changes;
2287                 log_before_transfer = !am_server;
2288         }
2289
2290         if (do_progress && !am_server) {
2291                 if (!log_before_transfer && INFO_EQ(NAME, 0))
2292                         parse_output_words(info_words, info_levels, "name", DEFAULT_PRIORITY);
2293                 parse_output_words(info_words, info_levels, "flist2,progress", DEFAULT_PRIORITY);
2294         }
2295
2296         if (dry_run)
2297                 do_xfers = 0;
2298
2299         set_io_timeout(io_timeout);
2300
2301         if (INFO_GTE(NAME, 1) && !stdout_format) {
2302                 stdout_format = "%n%L";
2303                 log_before_transfer = !am_server;
2304         }
2305         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
2306                 stdout_format_has_o_or_i = 1;
2307
2308         if (logfile_name && !am_daemon) {
2309                 if (!logfile_format) {
2310                         logfile_format = "%i %n%L";
2311                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
2312                 } else {
2313                         if (log_format_has(logfile_format, 'i'))
2314                                 logfile_format_has_i = 1;
2315                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
2316                                 logfile_format_has_o_or_i = 1;
2317                 }
2318                 log_init(0);
2319         } else if (!am_daemon)
2320                 logfile_format = NULL;
2321
2322         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
2323                 bwlimit = daemon_bwlimit;
2324         if (bwlimit) {
2325                 bwlimit_writemax = (size_t)bwlimit * 128;
2326                 if (bwlimit_writemax < 512)
2327                         bwlimit_writemax = 512;
2328         }
2329
2330         if (append_mode) {
2331                 if (whole_file > 0) {
2332                         snprintf(err_buf, sizeof err_buf,
2333                                  "--append cannot be used with --whole-file\n");
2334                         return 0;
2335                 }
2336                 if (refused_inplace) {
2337                         create_refuse_error(refused_inplace);
2338                         return 0;
2339                 }
2340                 inplace = 1;
2341         }
2342
2343         if (write_devices) {
2344                 if (refused_inplace) {
2345                         create_refuse_error(refused_inplace);
2346                         return 0;
2347                 }
2348                 inplace = 1;
2349         }
2350
2351         if (delay_updates && !partial_dir)
2352                 partial_dir = tmp_partialdir;
2353
2354         if (inplace) {
2355 #ifdef HAVE_FTRUNCATE
2356                 if (partial_dir) {
2357                         snprintf(err_buf, sizeof err_buf,
2358                                  "--%s cannot be used with --%s\n",
2359                                  append_mode ? "append" : "inplace",
2360                                  delay_updates ? "delay-updates" : "partial-dir");
2361                         return 0;
2362                 }
2363                 /* --inplace implies --partial for refusal purposes, but we
2364                  * clear the keep_partial flag for internal logic purposes. */
2365                 if (refused_partial) {
2366                         create_refuse_error(refused_partial);
2367                         return 0;
2368                 }
2369                 keep_partial = 0;
2370 #else
2371                 snprintf(err_buf, sizeof err_buf,
2372                          "--%s is not supported on this %s\n",
2373                          append_mode ? "append" : "inplace",
2374                          am_server ? "server" : "client");
2375                 return 0;
2376 #endif
2377         } else {
2378                 if (keep_partial && !partial_dir && !am_server) {
2379                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
2380                                 partial_dir = strdup(arg);
2381                 }
2382                 if (partial_dir) {
2383                         if (*partial_dir)
2384                                 clean_fname(partial_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2385                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
2386                                 partial_dir = NULL;
2387                         if (!partial_dir && refused_partial) {
2388                                 create_refuse_error(refused_partial);
2389                                 return 0;
2390                         }
2391                         keep_partial = 1;
2392                 }
2393         }
2394
2395         if (files_from) {
2396                 char *h, *p;
2397                 int q;
2398                 if (argc > 2 || (!am_daemon && !am_server && argc == 1)) {
2399                         usage(FERROR);
2400                         exit_cleanup(RERR_SYNTAX);
2401                 }
2402                 if (strcmp(files_from, "-") == 0) {
2403                         filesfrom_fd = 0;
2404                         if (am_server)
2405                                 filesfrom_host = ""; /* reading from socket */
2406                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
2407                         if (am_server) {
2408                                 snprintf(err_buf, sizeof err_buf,
2409                                         "The --files-from sent to the server cannot specify a host.\n");
2410                                 return 0;
2411                         }
2412                         files_from = p;
2413                         filesfrom_host = h;
2414                         if (strcmp(files_from, "-") == 0) {
2415                                 snprintf(err_buf, sizeof err_buf,
2416                                         "Invalid --files-from remote filename\n");
2417                                 return 0;
2418                         }
2419                 } else {
2420                         if (sanitize_paths)
2421                                 files_from = sanitize_path(NULL, files_from, NULL, 0, SP_DEFAULT);
2422                         if (daemon_filter_list.head) {
2423                                 char *dir;
2424                                 if (!*files_from)
2425                                         goto options_rejected;
2426                                 dir = files_from + (*files_from == '/' ? module_dirlen : 0);
2427                                 clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2428                                 if (check_filter(&daemon_filter_list, FLOG, dir, 0) < 0)
2429                                         goto options_rejected;
2430                         }
2431                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
2432                         if (filesfrom_fd < 0) {
2433                                 snprintf(err_buf, sizeof err_buf,
2434                                         "failed to open files-from file %s: %s\n",
2435                                         files_from, strerror(errno));
2436                                 return 0;
2437                         }
2438                 }
2439         }
2440
2441         am_starting_up = 0;
2442
2443         return 1;
2444
2445   options_rejected:
2446         snprintf(err_buf, sizeof err_buf,
2447                 "Your options have been rejected by the server.\n");
2448         return 0;
2449 }
2450
2451
2452 /**
2453  * Construct a filtered list of options to pass through from the
2454  * client to the server.
2455  *
2456  * This involves setting options that will tell the server how to
2457  * behave, and also filtering out options that are processed only
2458  * locally.
2459  **/
2460 void server_options(char **args, int *argc_p)
2461 {
2462         static char argstr[64];
2463         int ac = *argc_p;
2464         uchar where;
2465         char *arg;
2466         int i, x;
2467
2468         /* This should always remain first on the server's command-line. */
2469         args[ac++] = "--server";
2470
2471         if (daemon_over_rsh > 0) {
2472                 args[ac++] = "--daemon";
2473                 *argc_p = ac;
2474                 /* if we're passing --daemon, we're done */
2475                 return;
2476         }
2477
2478         if (!am_sender)
2479                 args[ac++] = "--sender";
2480
2481         x = 1;
2482         argstr[0] = '-';
2483
2484         if (protect_args)
2485                 argstr[x++] = 's';
2486
2487         for (i = 0; i < verbose; i++)
2488                 argstr[x++] = 'v';
2489
2490         if (quiet && msgs2stderr)
2491                 argstr[x++] = 'q';
2492         if (make_backups)
2493                 argstr[x++] = 'b';
2494         if (update_only)
2495                 argstr[x++] = 'u';
2496         if (!do_xfers) /* Note: NOT "dry_run"! */
2497                 argstr[x++] = 'n';
2498         if (preserve_links)
2499                 argstr[x++] = 'l';
2500         if ((xfer_dirs >= 2 && xfer_dirs < 4)
2501          || (xfer_dirs && !recurse && (list_only || (delete_mode && am_sender))))
2502                 argstr[x++] = 'd';
2503         if (am_sender) {
2504                 if (keep_dirlinks)
2505                         argstr[x++] = 'K';
2506                 if (prune_empty_dirs)
2507                         argstr[x++] = 'm';
2508                 if (omit_dir_times)
2509                         argstr[x++] = 'O';
2510                 if (omit_link_times)
2511                         argstr[x++] = 'J';
2512                 if (fuzzy_basis) {
2513                         argstr[x++] = 'y';
2514                         if (fuzzy_basis > 1)
2515                                 argstr[x++] = 'y';
2516                 }
2517         } else {
2518                 if (copy_links)
2519                         argstr[x++] = 'L';
2520                 if (copy_dirlinks)
2521                         argstr[x++] = 'k';
2522         }
2523
2524         if (whole_file > 0)
2525                 argstr[x++] = 'W';
2526         /* We don't need to send --no-whole-file, because it's the
2527          * default for remote transfers, and in any case old versions
2528          * of rsync will not understand it. */
2529
2530         if (preserve_hard_links) {
2531                 argstr[x++] = 'H';
2532                 if (preserve_hard_links > 1)
2533                         argstr[x++] = 'H';
2534         }
2535         if (preserve_uid)
2536                 argstr[x++] = 'o';
2537         if (preserve_gid)
2538                 argstr[x++] = 'g';
2539         if (preserve_devices) /* ignore preserve_specials here */
2540                 argstr[x++] = 'D';
2541         if (preserve_times)
2542                 argstr[x++] = 't';
2543         if (preserve_atimes) {
2544                 argstr[x++] = 'U';
2545                 if (preserve_atimes > 1)
2546                         argstr[x++] = 'U';
2547         }
2548         if (preserve_perms)
2549                 argstr[x++] = 'p';
2550         else if (preserve_executability && am_sender)
2551                 argstr[x++] = 'E';
2552 #ifdef SUPPORT_ACLS
2553         if (preserve_acls)
2554                 argstr[x++] = 'A';
2555 #endif
2556 #ifdef SUPPORT_XATTRS
2557         if (preserve_xattrs) {
2558                 argstr[x++] = 'X';
2559                 if (preserve_xattrs > 1)
2560                         argstr[x++] = 'X';
2561         }
2562 #endif
2563         if (recurse)
2564                 argstr[x++] = 'r';
2565         if (always_checksum)
2566                 argstr[x++] = 'c';
2567         if (cvs_exclude)
2568                 argstr[x++] = 'C';
2569         if (ignore_times)
2570                 argstr[x++] = 'I';
2571         if (relative_paths)
2572                 argstr[x++] = 'R';
2573         if (one_file_system) {
2574                 argstr[x++] = 'x';
2575                 if (one_file_system > 1)
2576                         argstr[x++] = 'x';
2577         }
2578         if (sparse_files)
2579                 argstr[x++] = 'S';
2580         if (do_compression == CPRES_ZLIB)
2581                 argstr[x++] = 'z';
2582
2583         set_allow_inc_recurse();
2584
2585         /* We don't really know the actual protocol_version at this point,
2586          * but checking the pre-negotiated value allows the user to use a
2587          * --protocol=29 override to avoid the use of this -eFLAGS opt. */
2588         if (protocol_version >= 30) {
2589                 /* Use "eFlags" alias so that cull_options doesn't think that these are no-arg option letters. */
2590 #define eFlags argstr
2591                 /* We make use of the -e option to let the server know about
2592                  * any pre-release protocol version && some behavior flags. */
2593                 eFlags[x++] = 'e';
2594 #if SUBPROTOCOL_VERSION != 0
2595                 if (protocol_version == PROTOCOL_VERSION) {
2596                         x += snprintf(argstr+x, sizeof argstr - x,
2597                                       "%d.%d",
2598                                       PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
2599                 } else
2600 #endif
2601                         eFlags[x++] = '.';
2602                 if (allow_inc_recurse)
2603                         eFlags[x++] = 'i';
2604 #ifdef CAN_SET_SYMLINK_TIMES
2605                 eFlags[x++] = 'L'; /* symlink time-setting support */
2606 #endif
2607 #ifdef ICONV_OPTION
2608                 eFlags[x++] = 's'; /* symlink iconv translation support */
2609 #endif
2610                 eFlags[x++] = 'f'; /* flist I/O-error safety support */
2611                 eFlags[x++] = 'x'; /* xattr hardlink optimization not desired */
2612                 eFlags[x++] = 'C'; /* support checksum seed order fix */
2613                 eFlags[x++] = 'I'; /* support inplace_partial behavior */
2614                 eFlags[x++] = 'v'; /* use varint for flist & compat flags; negotiate checksum */
2615                 /* NOTE: Avoid using 'V' -- it was the high bit of a write_byte() that became write_varint(). */
2616 #undef eFlags
2617         }
2618
2619         if (x >= (int)sizeof argstr) { /* Not possible... */
2620                 rprintf(FERROR, "argstr overflow in server_options().\n");
2621                 exit_cleanup(RERR_MALLOC);
2622         }
2623
2624         argstr[x] = '\0';
2625
2626         if (x > 1)
2627                 args[ac++] = argstr;
2628
2629 #ifdef ICONV_OPTION
2630         if (iconv_opt) {
2631                 char *set = strchr(iconv_opt, ',');
2632                 if (set)
2633                         set++;
2634                 else
2635                         set = iconv_opt;
2636                 if (asprintf(&arg, "--iconv=%s", set) < 0)
2637                         goto oom;
2638                 args[ac++] = arg;
2639         }
2640 #endif
2641
2642         if (protect_args && !local_server) /* unprotected args stop here */
2643                 args[ac++] = NULL;
2644
2645         if (list_only > 1)
2646                 args[ac++] = "--list-only";
2647
2648         /* This makes sure that the remote rsync can handle deleting with -d
2649          * sans -r because the --no-r option was added at the same time. */
2650         if (xfer_dirs && !recurse && delete_mode && am_sender)
2651                 args[ac++] = "--no-r";
2652
2653         if (do_compression && do_compression_level != CLVL_NOT_SPECIFIED) {
2654                 if (asprintf(&arg, "--compress-level=%d", do_compression_level) < 0)
2655                         goto oom;
2656                 args[ac++] = arg;
2657         }
2658
2659         if (preserve_devices) {
2660                 /* Note: sending "--devices" would not be backward-compatible. */
2661                 if (!preserve_specials)
2662                         args[ac++] = "--no-specials"; /* -D is already set. */
2663         } else if (preserve_specials)
2664                 args[ac++] = "--specials";
2665
2666         /* The server side doesn't use our log-format, but in certain
2667          * circumstances they need to know a little about the option. */
2668         if (stdout_format && am_sender) {
2669                 /* Use --log-format, not --out-format, for compatibility. */
2670                 if (stdout_format_has_i > 1)
2671                         args[ac++] = "--log-format=%i%I";
2672                 else if (stdout_format_has_i)
2673                         args[ac++] = "--log-format=%i";
2674                 else if (stdout_format_has_o_or_i)
2675                         args[ac++] = "--log-format=%o";
2676                 else if (!verbose)
2677                         args[ac++] = "--log-format=X";
2678         }
2679
2680         if (block_size) {
2681                 if (asprintf(&arg, "-B%lu", block_size) < 0)
2682                         goto oom;
2683                 args[ac++] = arg;
2684         }
2685
2686         if (io_timeout) {
2687                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
2688                         goto oom;
2689                 args[ac++] = arg;
2690         }
2691
2692         if (bwlimit) {
2693                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
2694                         goto oom;
2695                 args[ac++] = arg;
2696         }
2697
2698         if (backup_dir) {
2699                 args[ac++] = "--backup-dir";
2700                 args[ac++] = backup_dir;
2701         }
2702
2703         /* Only send --suffix if it specifies a non-default value. */
2704         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
2705                 /* We use the following syntax to avoid weirdness with '~'. */
2706                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
2707                         goto oom;
2708                 args[ac++] = arg;
2709         }
2710
2711         if (checksum_choice) {
2712                 if (asprintf(&arg, "--checksum-choice=%s", checksum_choice) < 0)
2713                         goto oom;
2714                 args[ac++] = arg;
2715         }
2716
2717         if (do_compression == CPRES_ZLIBX)
2718                 args[ac++] = "--new-compress";
2719         else if (compress_choice && do_compression == CPRES_ZLIB)
2720                 args[ac++] = "--old-compress";
2721         else if (compress_choice) {
2722                 if (asprintf(&arg, "--compress-choice=%s", compress_choice) < 0)
2723                         goto oom;
2724                 args[ac++] = arg;
2725         }
2726
2727         if (am_sender) {
2728                 if (max_delete > 0) {
2729                         if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
2730                                 goto oom;
2731                         args[ac++] = arg;
2732                 } else if (max_delete == 0)
2733                         args[ac++] = "--max-delete=-1";
2734                 if (min_size >= 0) {
2735                         args[ac++] = "--min-size";
2736                         args[ac++] = min_size_arg;
2737                 }
2738                 if (max_size >= 0) {
2739                         args[ac++] = "--max-size";
2740                         args[ac++] = max_size_arg;
2741                 }
2742                 if (delete_before)
2743                         args[ac++] = "--delete-before";
2744                 else if (delete_during == 2)
2745                         args[ac++] = "--delete-delay";
2746                 else if (delete_during)
2747                         args[ac++] = "--delete-during";
2748                 else if (delete_after)
2749                         args[ac++] = "--delete-after";
2750                 else if (delete_mode && !delete_excluded)
2751                         args[ac++] = "--delete";
2752                 if (delete_excluded)
2753                         args[ac++] = "--delete-excluded";
2754                 if (force_delete)
2755                         args[ac++] = "--force";
2756                 if (write_batch < 0)
2757                         args[ac++] = "--only-write-batch=X";
2758                 if (am_root > 1)
2759                         args[ac++] = "--super";
2760                 if (size_only)
2761                         args[ac++] = "--size-only";
2762                 if (do_stats)
2763                         args[ac++] = "--stats";
2764         } else {
2765                 if (skip_compress) {
2766                         if (asprintf(&arg, "--skip-compress=%s", skip_compress) < 0)
2767                                 goto oom;
2768                         args[ac++] = arg;
2769                 }
2770         }
2771
2772         /* --delete-missing-args needs the cooperation of both sides, but
2773          * the sender can handle --ignore-missing-args by itself. */
2774         if (missing_args == 2)
2775                 args[ac++] = "--delete-missing-args";
2776         else if (missing_args == 1 && !am_sender)
2777                 args[ac++] = "--ignore-missing-args";
2778
2779         if (modify_window_set && am_sender) {
2780                 char *fmt = modify_window < 0 ? "-@%d" : "--modify-window=%d";
2781                 if (asprintf(&arg, fmt, modify_window) < 0)
2782                         goto oom;
2783                 args[ac++] = arg;
2784         }
2785
2786         if (checksum_seed) {
2787                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
2788                         goto oom;
2789                 args[ac++] = arg;
2790         }
2791
2792         if (partial_dir && am_sender) {
2793                 if (partial_dir != tmp_partialdir) {
2794                         args[ac++] = "--partial-dir";
2795                         args[ac++] = partial_dir;
2796                 }
2797                 if (delay_updates)
2798                         args[ac++] = "--delay-updates";
2799         } else if (keep_partial && am_sender)
2800                 args[ac++] = "--partial";
2801
2802         if (ignore_errors)
2803                 args[ac++] = "--ignore-errors";
2804
2805         if (copy_unsafe_links)
2806                 args[ac++] = "--copy-unsafe-links";
2807
2808         if (safe_symlinks)
2809                 args[ac++] = "--safe-links";
2810
2811         if (numeric_ids)
2812                 args[ac++] = "--numeric-ids";
2813
2814         if (use_qsort)
2815                 args[ac++] = "--use-qsort";
2816
2817         if (am_sender) {
2818                 if (usermap) {
2819                         if (asprintf(&arg, "--usermap=%s", usermap) < 0)
2820                                 goto oom;
2821                         args[ac++] = arg;
2822                 }
2823
2824                 if (groupmap) {
2825                         if (asprintf(&arg, "--groupmap=%s", groupmap) < 0)
2826                                 goto oom;
2827                         args[ac++] = arg;
2828                 }
2829
2830                 if (ignore_existing)
2831                         args[ac++] = "--ignore-existing";
2832
2833                 /* Backward compatibility: send --existing, not --ignore-non-existing. */
2834                 if (ignore_non_existing)
2835                         args[ac++] = "--existing";
2836
2837                 if (tmpdir) {
2838                         args[ac++] = "--temp-dir";
2839                         args[ac++] = tmpdir;
2840                 }
2841
2842                 if (basis_dir[0]) {
2843                         /* the server only needs this option if it is not the sender,
2844                          *   and it may be an older version that doesn't know this
2845                          *   option, so don't send it if client is the sender.
2846                          */
2847                         for (i = 0; i < basis_dir_cnt; i++) {
2848                                 args[ac++] = alt_dest_opt(0);
2849                                 args[ac++] = basis_dir[i];
2850                         }
2851                 }
2852         }
2853
2854         /* What flags do we need to send to the other side? */
2855         where = (am_server ? W_CLI : W_SRV) | (am_sender ? W_REC : W_SND);
2856         arg = make_output_option(info_words, info_levels, where);
2857         if (arg)
2858                 args[ac++] = arg;
2859
2860         if (append_mode) {
2861                 if (append_mode > 1)
2862                         args[ac++] = "--append";
2863                 args[ac++] = "--append";
2864         } else if (inplace)
2865                 args[ac++] = "--inplace";
2866
2867         if (files_from && (!am_sender || filesfrom_host)) {
2868                 if (filesfrom_host) {
2869                         args[ac++] = "--files-from";
2870                         args[ac++] = files_from;
2871                         if (eol_nulls)
2872                                 args[ac++] = "--from0";
2873                 } else {
2874                         args[ac++] = "--files-from=-";
2875                         args[ac++] = "--from0";
2876                 }
2877                 if (!relative_paths)
2878                         args[ac++] = "--no-relative";
2879         }
2880         /* It's OK that this checks the upper-bound of the protocol_version. */
2881         if (relative_paths && !implied_dirs && (!am_sender || protocol_version >= 30))
2882                 args[ac++] = "--no-implied-dirs";
2883
2884         if (write_devices && am_sender)
2885                 args[ac++] = "--write-devices";
2886
2887         if (remove_source_files == 1)
2888                 args[ac++] = "--remove-source-files";
2889         else if (remove_source_files)
2890                 args[ac++] = "--remove-sent-files";
2891
2892         if (preallocate_files && am_sender)
2893                 args[ac++] = "--preallocate";
2894
2895         if (open_noatime && preserve_atimes <= 1)
2896                 args[ac++] = "--open-noatime";
2897
2898         if (ac > MAX_SERVER_ARGS) { /* Not possible... */
2899                 rprintf(FERROR, "argc overflow in server_options().\n");
2900                 exit_cleanup(RERR_MALLOC);
2901         }
2902
2903         if (remote_option_cnt) {
2904                 int j;
2905                 if (ac + remote_option_cnt > MAX_SERVER_ARGS) {
2906                         rprintf(FERROR, "too many remote options specified.\n");
2907                         exit_cleanup(RERR_SYNTAX);
2908                 }
2909                 for (j = 1; j <= remote_option_cnt; j++)
2910                         args[ac++] = (char*)remote_options[j];
2911         }
2912
2913         *argc_p = ac;
2914         return;
2915
2916     oom:
2917         out_of_memory("server_options");
2918 }
2919
2920 /* If str points to a valid hostspec, return allocated memory containing the
2921  * [USER@]HOST part of the string, and set the path_start_ptr to the part of
2922  * the string after the host part.  Otherwise, return NULL.  If port_ptr is
2923  * non-NULL, we must be parsing an rsync:// URL hostname, and we will set
2924  * *port_ptr if a port number is found.  Note that IPv6 IPs will have their
2925  * (required for parsing) [ and ] chars elided from the returned string. */
2926 static char *parse_hostspec(char *str, char **path_start_ptr, int *port_ptr)
2927 {
2928         char *s, *host_start = str;
2929         int hostlen = 0, userlen = 0;
2930         char *ret;
2931
2932         for (s = str; ; s++) {
2933                 if (!*s) {
2934                         /* It is only OK if we run out of string with rsync:// */
2935                         if (!port_ptr)
2936                                 return NULL;
2937                         if (!hostlen)
2938                                 hostlen = s - host_start;
2939                         break;
2940                 }
2941                 if (*s == ':' || *s == '/') {
2942                         if (!hostlen)
2943                                 hostlen = s - host_start;
2944                         if (*s++ == '/') {
2945                                 if (!port_ptr)
2946                                         return NULL;
2947                         } else if (port_ptr) {
2948                                 *port_ptr = atoi(s);
2949                                 while (isDigit(s)) s++;
2950                                 if (*s && *s++ != '/')
2951                                         return NULL;
2952                         }
2953                         break;
2954                 }
2955                 if (*s == '@') {
2956                         userlen = s - str + 1;
2957                         host_start = s + 1;
2958                 } else if (*s == '[') {
2959                         if (s != host_start++)
2960                                 return NULL;
2961                         while (*s && *s != ']' && *s != '/') s++; /*SHARED ITERATOR*/
2962                         hostlen = s - host_start;
2963                         if (*s != ']' || (s[1] && s[1] != '/' && s[1] != ':') || !hostlen)
2964                                 return NULL;
2965                 }
2966         }
2967
2968         *path_start_ptr = s;
2969         ret = new_array(char, userlen + hostlen + 1);
2970         if (userlen)
2971                 strlcpy(ret, str, userlen + 1);
2972         strlcpy(ret + userlen, host_start, hostlen + 1);
2973         return ret;
2974 }
2975
2976 /* Look for a HOST specification of the form "HOST:PATH", "HOST::PATH", or
2977  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
2978  * memory with the HOST.  If a daemon-accessing spec was specified, the value
2979  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
2980  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
2981  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
2982  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
2983 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
2984 {
2985         char *path;
2986
2987         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
2988                 *host_ptr = parse_hostspec(s + strlen(URL_PREFIX), &path, port_ptr);
2989                 if (*host_ptr) {
2990                         if (!*port_ptr)
2991                                 *port_ptr = -1; /* -1 indicates they want the default */
2992                         return path;
2993                 }
2994         }
2995
2996         *host_ptr = parse_hostspec(s, &path, NULL);
2997         if (!*host_ptr)
2998                 return NULL;
2999
3000         if (*path == ':') {
3001                 if (port_ptr && !*port_ptr)
3002                         *port_ptr = -1;
3003                 return path + 1;
3004         }
3005         if (port_ptr)
3006                 *port_ptr = 0;
3007
3008         return path;
3009 }