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 "ifuncs.h"
  25 #include "latest-year.h"
  26 #include <popt.h>
  27
  28 extern int module_id;
  29 extern int local_server;
  30 extern int sanitize_paths;
  31 extern int daemon_over_rsh;
  32 extern unsigned int module_dirlen;
  33 extern struct name_num_obj valid_checksums;
  34 extern struct name_num_obj valid_compressions;
  35 extern filter_rule_list filter_list;
  36 extern filter_rule_list daemon_filter_list;
  37
  38 int make_backups = 0;
  39
  40 /**
  41  * If 1, send the whole file as literal data rather than trying to
  42  * create an incremental diff.
  43  *
  44  * If -1, then look at whether we're local or remote and go by that.
  45  *
  46  * @sa disable_deltas_p()
  47  **/
  48 int whole_file = -1;
  49
  50 int append_mode = 0;
  51 int keep_dirlinks = 0;
  52 int copy_dirlinks = 0;
  53 int copy_links = 0;
  54 int write_devices = 0;
  55 int preserve_links = 0;
  56 int preserve_hard_links = 0;
  57 int preserve_acls = 0;
  58 int preserve_xattrs = 0;
  59 int preserve_perms = 0;
  60 int preserve_executability = 0;
  61 int preserve_devices = 0;
  62 int preserve_specials = 0;
  63 int preserve_uid = 0;
  64 int preserve_gid = 0;
  65 int preserve_times = 0;
  66 int preserve_atimes = 0;
  67 int update_only = 0;
  68 int open_noatime = 0;
  69 int cvs_exclude = 0;
  70 int dry_run = 0;
  71 int do_xfers = 1;
  72 int ignore_times = 0;
  73 int delete_mode = 0;
  74 int delete_during = 0;
  75 int delete_before = 0;
  76 int delete_after = 0;
  77 int delete_excluded = 0;
  78 int remove_source_files = 0;
  79 int one_file_system = 0;
  80 int protocol_version = PROTOCOL_VERSION;
  81 int sparse_files = 0;
  82 int preallocate_files = 0;
  83 int do_compression = 0;
  84 int do_compression_level = CLVL_NOT_SPECIFIED;
  85 int am_root = 0; /* 0 = normal, 1 = root, 2 = --super, -1 = --fake-super */
  86 int am_server = 0;
  87 int am_sender = 0;
  88 int am_starting_up = 1;
  89 int relative_paths = -1;
  90 int implied_dirs = 1;
  91 int missing_args = 0; /* 0 = FERROR_XFER, 1 = ignore, 2 = delete */
  92 int numeric_ids = 0;
  93 int msgs2stderr = 0;
  94 int allow_8bit_chars = 0;
  95 int force_delete = 0;
  96 int io_timeout = 0;
  97 int prune_empty_dirs = 0;
  98 int use_qsort = 0;
  99 char *files_from = NULL;
 100 int filesfrom_fd = -1;
 101 char *filesfrom_host = NULL;
 102 int eol_nulls = 0;
 103 int protect_args = -1;
 104 int human_readable = 1;
 105 int recurse = 0;
 106 int allow_inc_recurse = 1;
 107 int xfer_dirs = -1;
 108 int am_daemon = 0;
 109 int connect_timeout = 0;
 110 int keep_partial = 0;
 111 int safe_symlinks = 0;
 112 int copy_unsafe_links = 0;
 113 int munge_symlinks = 0;
 114 int size_only = 0;
 115 int daemon_bwlimit = 0;
 116 int bwlimit = 0;
 117 int fuzzy_basis = 0;
 118 size_t bwlimit_writemax = 0;
 119 int ignore_existing = 0;
 120 int ignore_non_existing = 0;
 121 int need_messages_from_generator = 0;
 122 int max_delete = INT_MIN;
 123 OFF_T max_size = -1;
 124 OFF_T min_size = -1;
 125 int ignore_errors = 0;
 126 int modify_window = 0;
 127 int blocking_io = -1;
 128 int checksum_seed = 0;
 129 int inplace = 0;
 130 int delay_updates = 0;
 131 long block_size = 0; /* "long" because popt can't set an int32. */
 132 char *skip_compress = NULL;
 133 char *copy_as = NULL;
 134 item_list dparam_list = EMPTY_ITEM_LIST;
 135
 136 /** Network address family. **/
 137 int default_af_hint
 138 #ifdef INET6
 139         = 0;            /* Any protocol */
 140 #else
 141         = AF_INET;      /* Must use IPv4 */
 142 # ifdef AF_INET6
 143 #  undef AF_INET6
 144 # endif
 145 # define AF_INET6 AF_INET /* make -6 option a no-op */
 146 #endif
 147
 148 /** Do not go into the background when run as --daemon.  Good
 149  * for debugging and required for running as a service on W32,
 150  * or under Unix process-monitors. **/
 151 int no_detach
 152 #if defined _WIN32 || defined __WIN32__
 153         = 1;
 154 #else
 155         = 0;
 156 #endif
 157
 158 int write_batch = 0;
 159 int read_batch = 0;
 160 int backup_dir_len = 0;
 161 int backup_suffix_len;
 162 unsigned int backup_dir_remainder;
 163
 164 char *backup_suffix = NULL;
 165 char *tmpdir = NULL;
 166 char *partial_dir = NULL;
 167 char *basis_dir[MAX_BASIS_DIRS+1];
 168 char *config_file = NULL;
 169 char *shell_cmd = NULL;
 170 char *logfile_name = NULL;
 171 char *logfile_format = NULL;
 172 char *stdout_format = NULL;
 173 char *password_file = NULL;
 174 char *early_input_file = NULL;
 175 char *rsync_path = RSYNC_PATH;
 176 char *backup_dir = NULL;
 177 char backup_dir_buf[MAXPATHLEN];
 178 char *sockopts = NULL;
 179 char *usermap = NULL;
 180 char *groupmap = NULL;
 181 int rsync_port = 0;
 182 int alt_dest_type = 0;
 183 int basis_dir_cnt = 0;
 184
 185 #define DEFAULT_MAX_ALLOC (1024L * 1024 * 1024)
 186 size_t max_alloc = DEFAULT_MAX_ALLOC;
 187 char *max_alloc_arg;
 188
 189 static int version_opt_cnt = 0;
 190 static int remote_option_alloc = 0;
 191 int remote_option_cnt = 0;
 192 const char **remote_options = NULL;
 193 const char *checksum_choice = NULL;
 194 const char *compress_choice = NULL;
 195
 196 #ifndef __APPLE__ /* Do we need a configure check for this? */
 197 #define SUPPORT_ATIMES 1
 198 #endif
 199
 200 int quiet = 0;
 201 int output_motd = 1;
 202 int log_before_transfer = 0;
 203 int stdout_format_has_i = 0;
 204 int stdout_format_has_o_or_i = 0;
 205 int logfile_format_has_i = 0;
 206 int logfile_format_has_o_or_i = 0;
 207 int always_checksum = 0;
 208 int list_only = 0;
 209
 210 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
 211 char *batch_name = NULL;
 212
 213 int need_unsorted_flist = 0;
 214 char *iconv_opt =
 215 #ifdef ICONV_OPTION
 216                 ICONV_OPTION;
 217 #else
 218                 NULL;
 219 #endif
 220
 221 struct chmod_mode_struct *chmod_modes = NULL;
 222
 223 static const char *debug_verbosity[] = {
 224         /*0*/ NULL,
 225         /*1*/ NULL,
 226         /*2*/ "BIND,CMD,CONNECT,DEL,DELTASUM,DUP,FILTER,FLIST,ICONV",
 227         /*3*/ "ACL,BACKUP,CONNECT2,DELTASUM2,DEL2,EXIT,FILTER2,FLIST2,FUZZY,GENR,OWN,RECV,SEND,TIME",
 228         /*4*/ "CMD2,DELTASUM3,DEL3,EXIT2,FLIST3,ICONV2,OWN2,PROTO,TIME2",
 229         /*5*/ "CHDIR,DELTASUM4,FLIST4,FUZZY2,HASH,HLINK",
 230 };
 231
 232 #define MAX_VERBOSITY ((int)(sizeof debug_verbosity / sizeof debug_verbosity[0]) - 1)
 233
 234 static const char *info_verbosity[1+MAX_VERBOSITY] = {
 235         /*0*/ NULL,
 236         /*1*/ "COPY,DEL,FLIST,MISC,NAME,STATS,SYMSAFE",
 237         /*2*/ "BACKUP,MISC2,MOUNT,NAME2,REMOVE,SKIP",
 238 };
 239
 240 #define MAX_OUT_LEVEL 4 /* The largest N allowed for any flagN word. */
 241
 242 short info_levels[COUNT_INFO], debug_levels[COUNT_DEBUG];
 243
 244 #define DEFAULT_PRIORITY 0      /* Default/implied/--verbose set values. */
 245 #define HELP_PRIORITY 1         /* The help output uses this level. */
 246 #define USER_PRIORITY 2         /* User-specified via --info or --debug */
 247 #define LIMIT_PRIORITY 3        /* Overriding priority when limiting values. */
 248
 249 #define W_CLI (1<<0)    /* client side */
 250 #define W_SRV (1<<1)    /* server side */
 251 #define W_SND (1<<2)    /* sending side */
 252 #define W_REC (1<<3)    /* receiving side */
 253
 254 struct output_struct {
 255         char *name;     /* The name of the info/debug flag. */
 256         char *help;     /* The description of the info/debug flag. */
 257         uchar namelen;  /* The length of the name string. */
 258         uchar flag;     /* The flag's value, for consistency check. */
 259         uchar where;    /* Bits indicating where the flag is used. */
 260         uchar priority; /* See *_PRIORITY defines. */
 261 };
 262
 263 #define INFO_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, INFO_##flag, where, 0 }
 264
 265 static struct output_struct info_words[COUNT_INFO+1] = {
 266         INFO_WORD(BACKUP, W_REC, "Mention files backed up"),
 267         INFO_WORD(COPY, W_REC, "Mention files copied locally on the receiving side"),
 268         INFO_WORD(DEL, W_REC, "Mention deletions on the receiving side"),
 269         INFO_WORD(FLIST, W_CLI, "Mention file-list receiving/sending (levels 1-2)"),
 270         INFO_WORD(MISC, W_SND|W_REC, "Mention miscellaneous information (levels 1-2)"),
 271         INFO_WORD(MOUNT, W_SND|W_REC, "Mention mounts that were found or skipped"),
 272         INFO_WORD(NAME, W_SND|W_REC, "Mention 1) updated file/dir names, 2) unchanged names"),
 273         INFO_WORD(PROGRESS, W_CLI, "Mention 1) per-file progress or 2) total transfer progress"),
 274         INFO_WORD(REMOVE, W_SND, "Mention files removed on the sending side"),
 275         INFO_WORD(SKIP, W_REC, "Mention files that are skipped due to options used"),
 276         INFO_WORD(STATS, W_CLI|W_SRV, "Mention statistics at end of run (levels 1-3)"),
 277         INFO_WORD(SYMSAFE, W_SND|W_REC, "Mention symlinks that are unsafe"),
 278         { NULL, "--info", 0, 0, 0, 0 }
 279 };
 280
 281 #define DEBUG_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, DEBUG_##flag, where, 0 }
 282
 283 static struct output_struct debug_words[COUNT_DEBUG+1] = {
 284         DEBUG_WORD(ACL, W_SND|W_REC, "Debug extra ACL info"),
 285         DEBUG_WORD(BACKUP, W_REC, "Debug backup actions (levels 1-2)"),
 286         DEBUG_WORD(BIND, W_CLI, "Debug socket bind actions"),
 287         DEBUG_WORD(CHDIR, W_CLI|W_SRV, "Debug when the current directory changes"),
 288         DEBUG_WORD(CONNECT, W_CLI, "Debug connection events (levels 1-2)"),
 289         DEBUG_WORD(CMD, W_CLI, "Debug commands+options that are issued (levels 1-2)"),
 290         DEBUG_WORD(DEL, W_REC, "Debug delete actions (levels 1-3)"),
 291         DEBUG_WORD(DELTASUM, W_SND|W_REC, "Debug delta-transfer checksumming (levels 1-4)"),
 292         DEBUG_WORD(DUP, W_REC, "Debug weeding of duplicate names"),
 293         DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-3)"),
 294         DEBUG_WORD(FILTER, W_SND|W_REC, "Debug filter actions (levels 1-2)"),
 295         DEBUG_WORD(FLIST, W_SND|W_REC, "Debug file-list operations (levels 1-4)"),
 296         DEBUG_WORD(FUZZY, W_REC, "Debug fuzzy scoring (levels 1-2)"),
 297         DEBUG_WORD(GENR, W_REC, "Debug generator functions"),
 298         DEBUG_WORD(HASH, W_SND|W_REC, "Debug hashtable code"),
 299         DEBUG_WORD(HLINK, W_SND|W_REC, "Debug hard-link actions (levels 1-3)"),
 300         DEBUG_WORD(ICONV, W_CLI|W_SRV, "Debug iconv character conversions (levels 1-2)"),
 301         DEBUG_WORD(IO, W_CLI|W_SRV, "Debug I/O routines (levels 1-4)"),
 302         DEBUG_WORD(NSTR, W_CLI|W_SRV, "Debug negotiation strings"),
 303         DEBUG_WORD(OWN, W_REC, "Debug ownership changes in users & groups (levels 1-2)"),
 304         DEBUG_WORD(PROTO, W_CLI|W_SRV, "Debug protocol information"),
 305         DEBUG_WORD(RECV, W_REC, "Debug receiver functions"),
 306         DEBUG_WORD(SEND, W_SND, "Debug sender functions"),
 307         DEBUG_WORD(TIME, W_REC, "Debug setting of modified times (levels 1-2)"),
 308         { NULL, "--debug", 0, 0, 0, 0 }
 309 };
 310
 311 static int verbose = 0;
 312 static int do_stats = 0;
 313 static int do_progress = 0;
 314 static int daemon_opt;   /* sets am_daemon after option error-reporting */
 315 static int omit_dir_times = 0;
 316 static int omit_link_times = 0;
 317 static int F_option_cnt = 0;
 318 static int modify_window_set;
 319 static int itemize_changes = 0;
 320 static int refused_delete, refused_archive_part, refused_compress;
 321 static int refused_partial, refused_progress, refused_delete_before;
 322 static int refused_delete_during;
 323 static int refused_inplace, refused_no_iconv;
 324 static BOOL usermap_via_chown, groupmap_via_chown;
 325 static char *outbuf_mode;
 326 static char *bwlimit_arg, *max_size_arg, *min_size_arg;
 327 static char tmp_partialdir[] = ".~tmp~";
 328
 329 /** Local address to bind.  As a character string because it's
 330  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
 331  * address, or a hostname. **/
 332 char *bind_address;
 333
 334 static void output_item_help(struct output_struct *words);
 335
 336 /* This constructs a string that represents all the options set for either
 337  * the --info or --debug setting, skipping any implied options (by -v, etc.).
 338  * This is used both when conveying the user's options to the server, and
 339  * when the help output wants to tell the user what options are implied. */
 340 static char *make_output_option(struct output_struct *words, short *levels, uchar where)
 341 {
 342         char *str = words == info_words ? "--info=" : "--debug=";
 343         int j, counts[MAX_OUT_LEVEL+1], pos, skipped = 0, len = 0, max = 0, lev = 0;
 344         int word_count = words == info_words ? COUNT_INFO : COUNT_DEBUG;
 345         char *buf;
 346
 347         memset(counts, 0, sizeof counts);
 348
 349         for (j = 0; words[j].name; j++) {
 350                 if (words[j].flag != j) {
 351                         rprintf(FERROR, "rsync: internal error on %s%s: %d != %d\n",
 352                                 words == info_words ? "INFO_" : "DEBUG_",
 353                                 words[j].name, words[j].flag, j);
 354                         exit_cleanup(RERR_UNSUPPORTED);
 355                 }
 356                 if (!(words[j].where & where))
 357                         continue;
 358                 if (words[j].priority == DEFAULT_PRIORITY) {
 359                         /* Implied items don't need to be mentioned. */
 360                         skipped++;
 361                         continue;
 362                 }
 363                 len += len ? 1 : strlen(str);
 364                 len += strlen(words[j].name);
 365                 len += levels[j] == 1 ? 0 : 1;
 366
 367                 if (words[j].priority == HELP_PRIORITY)
 368                         continue; /* no abbreviating for help */
 369
 370                 assert(levels[j] <= MAX_OUT_LEVEL);
 371                 if (++counts[levels[j]] > max) {
 372                         /* Determine which level has the most items. */
 373                         lev = levels[j];
 374                         max = counts[lev];
 375                 }
 376         }
 377
 378         /* Sanity check the COUNT_* define against the length of the table. */
 379         if (j != word_count) {
 380                 rprintf(FERROR, "rsync: internal error: %s is wrong! (%d != %d)\n",
 381                         words == info_words ? "COUNT_INFO" : "COUNT_DEBUG",
 382                         j, word_count);
 383                 exit_cleanup(RERR_UNSUPPORTED);
 384         }
 385
 386         if (!len)
 387                 return NULL;
 388
 389         len++;
 390         buf = new_array(char, len);
 391         pos = 0;
 392
 393         if (skipped || max < 5)
 394                 lev = -1;
 395         else {
 396                 if (lev == 0)
 397                         pos += snprintf(buf, len, "%sNONE", str);
 398                 else if (lev == 1)
 399                         pos += snprintf(buf, len, "%sALL", str);
 400                 else
 401                         pos += snprintf(buf, len, "%sALL%d", str, lev);
 402         }
 403
 404         for (j = 0; words[j].name && pos < len; j++) {
 405                 if (words[j].priority == DEFAULT_PRIORITY || levels[j] == lev || !(words[j].where & where))
 406                         continue;
 407                 if (pos)
 408                         buf[pos++] = ',';
 409                 else
 410                         pos += strlcpy(buf+pos, str, len-pos);
 411                 if (pos < len)
 412                         pos += strlcpy(buf+pos, words[j].name, len-pos);
 413                 /* Level 1 is implied by the name alone. */
 414                 if (levels[j] != 1 && pos < len)
 415                         buf[pos++] = '0' + levels[j];
 416         }
 417
 418         buf[pos] = '\0';
 419
 420         return buf;
 421 }
 422
 423 static void parse_output_words(struct output_struct *words, short *levels, const char *str, uchar priority)
 424 {
 425         const char *s;
 426         int j, len, lev;
 427
 428         for ( ; str; str = s) {
 429                 if ((s = strchr(str, ',')) != NULL)
 430                         len = s++ - str;
 431                 else
 432                         len = strlen(str);
 433                 if (!len)
 434                         continue;
 435                 if (!isDigit(str)) {
 436                         while (len && isDigit(str+len-1))
 437                                 len--;
 438                 }
 439                 lev = isDigit(str+len) ? atoi(str+len) : 1;
 440                 if (lev > MAX_OUT_LEVEL)
 441                         lev = MAX_OUT_LEVEL;
 442                 if (len == 4 && strncasecmp(str, "help", 4) == 0) {
 443                         output_item_help(words);
 444                         exit_cleanup(0);
 445                 }
 446                 if (len == 4 && strncasecmp(str, "none", 4) == 0)
 447                         len = lev = 0;
 448                 else if (len == 3 && strncasecmp(str, "all", 3) == 0)
 449                         len = 0;
 450                 for (j = 0; words[j].name; j++) {
 451                         if (!len
 452                          || (len == words[j].namelen && strncasecmp(str, words[j].name, len) == 0)) {
 453                                 if (priority >= words[j].priority) {
 454                                         words[j].priority = priority;
 455                                         levels[j] = lev;
 456                                 }
 457                                 if (len)
 458                                         break;
 459                         }
 460                 }
 461                 if (len && !words[j].name && !am_server) {
 462                         rprintf(FERROR, "Unknown %s item: \"%.*s\"\n",
 463                                 words[j].help, len, str);
 464                         exit_cleanup(RERR_SYNTAX);
 465                 }
 466         }
 467 }
 468
 469 /* Tell the user what all the info or debug flags mean. */
 470 static void output_item_help(struct output_struct *words)
 471 {
 472         short *levels = words == info_words ? info_levels : debug_levels;
 473         const char **verbosity = words == info_words ? info_verbosity : debug_verbosity;
 474         char buf[128], *opt, *fmt = "%-10s %s\n";
 475         int j;
 476
 477         reset_output_levels();
 478
 479         rprintf(FINFO, "Use OPT or OPT1 for level 1 output, OPT2 for level 2, etc.; OPT0 silences.\n");
 480         rprintf(FINFO, "\n");
 481         for (j = 0; words[j].name; j++)
 482                 rprintf(FINFO, fmt, words[j].name, words[j].help);
 483         rprintf(FINFO, "\n");
 484
 485         snprintf(buf, sizeof buf, "Set all %s options (e.g. all%d)",
 486                  words[j].help, MAX_OUT_LEVEL);
 487         rprintf(FINFO, fmt, "ALL", buf);
 488
 489         snprintf(buf, sizeof buf, "Silence all %s options (same as all0)",
 490                  words[j].help);
 491         rprintf(FINFO, fmt, "NONE", buf);
 492
 493         rprintf(FINFO, fmt, "HELP", "Output this help message");
 494         rprintf(FINFO, "\n");
 495         rprintf(FINFO, "Options added for each increase in verbose level:\n");
 496
 497         for (j = 1; j <= MAX_VERBOSITY; j++) {
 498                 parse_output_words(words, levels, verbosity[j], HELP_PRIORITY);
 499                 opt = make_output_option(words, levels, W_CLI|W_SRV|W_SND|W_REC);
 500                 if (opt) {
 501                         rprintf(FINFO, "%d) %s\n", j, strchr(opt, '=')+1);
 502                         free(opt);
 503                 }
 504                 reset_output_levels();
 505         }
 506 }
 507
 508 /* The --verbose option now sets info+debug flags. */
 509 static void set_output_verbosity(int level, uchar priority)
 510 {
 511         int j;
 512
 513         if (level > MAX_VERBOSITY)
 514                 level = MAX_VERBOSITY;
 515
 516         for (j = 1; j <= level; j++) {
 517                 parse_output_words(info_words, info_levels, info_verbosity[j], priority);
 518                 parse_output_words(debug_words, debug_levels, debug_verbosity[j], priority);
 519         }
 520 }
 521
 522 /* Limit the info+debug flag levels given a verbose-option level limit. */
 523 void limit_output_verbosity(int level)
 524 {
 525         short info_limits[COUNT_INFO], debug_limits[COUNT_DEBUG];
 526         int j;
 527
 528         if (level > MAX_VERBOSITY)
 529                 return;
 530
 531         memset(info_limits, 0, sizeof info_limits);
 532         memset(debug_limits, 0, sizeof debug_limits);
 533
 534         /* Compute the level limits in the above arrays. */
 535         for (j = 1; j <= level; j++) {
 536                 parse_output_words(info_words, info_limits, info_verbosity[j], LIMIT_PRIORITY);
 537                 parse_output_words(debug_words, debug_limits, debug_verbosity[j], LIMIT_PRIORITY);
 538         }
 539
 540         for (j = 0; j < COUNT_INFO; j++) {
 541                 if (info_levels[j] > info_limits[j])
 542                         info_levels[j] = info_limits[j];
 543         }
 544
 545         for (j = 0; j < COUNT_DEBUG; j++) {
 546                 if (debug_levels[j] > debug_limits[j])
 547                         debug_levels[j] = debug_limits[j];
 548         }
 549 }
 550
 551 void reset_output_levels(void)
 552 {
 553         int j;
 554
 555         memset(info_levels, 0, sizeof info_levels);
 556         memset(debug_levels, 0, sizeof debug_levels);
 557
 558         for (j = 0; j < COUNT_INFO; j++)
 559                 info_words[j].priority = DEFAULT_PRIORITY;
 560
 561         for (j = 0; j < COUNT_DEBUG; j++)
 562                 debug_words[j].priority = DEFAULT_PRIORITY;
 563 }
 564
 565 void negate_output_levels(void)
 566 {
 567         int j;
 568
 569         for (j = 0; j < COUNT_INFO; j++)
 570                 info_levels[j] *= -1;
 571
 572         for (j = 0; j < COUNT_DEBUG; j++)
 573                 debug_levels[j] *= -1;
 574 }
 575
 576 static char *istring(const char *fmt, int val)
 577 {
 578         char *str;
 579         if (asprintf(&str, fmt, val) < 0)
 580                 out_of_memory("istring");
 581         return str;
 582 }
 583
 584 static void print_info_flags(enum logcode f)
 585 {
 586         STRUCT_STAT *dumstat;
 587         char line_buf[75];
 588         int line_len, j;
 589         char *info_flags[] = {
 590
 591         "*Capabilities",
 592
 593                 istring("%d-bit files", (int)(sizeof (OFF_T) * 8)),
 594                 istring("%d-bit inums", (int)(sizeof dumstat->st_ino * 8)), /* Don't check ino_t! */
 595                 istring("%d-bit timestamps", (int)(sizeof (time_t) * 8)),
 596                 istring("%d-bit long ints", (int)(sizeof (int64) * 8)),
 597
 598 #ifndef HAVE_SOCKETPAIR
 599                 "no "
 600 #endif
 601                         "socketpairs",
 602
 603 #ifndef SUPPORT_HARD_LINKS
 604                 "no "
 605 #endif
 606                         "hardlinks",
 607
 608 #ifndef SUPPORT_LINKS
 609                 "no "
 610 #endif
 611                         "symlinks",
 612
 613 #ifndef INET6
 614                 "no "
 615 #endif
 616                         "IPv6",
 617
 618 #ifndef SUPPORT_ATIMES
 619                 "no "
 620 #endif
 621                         "atimes",
 622
 623                 "batchfiles",
 624
 625 #ifndef HAVE_FTRUNCATE
 626                 "no "
 627 #endif
 628                         "inplace",
 629
 630 #ifndef HAVE_FTRUNCATE
 631                 "no "
 632 #endif
 633                         "append",
 634
 635 #ifndef SUPPORT_ACLS
 636                 "no "
 637 #endif
 638                         "ACLs",
 639
 640 #ifndef SUPPORT_XATTRS
 641                 "no "
 642 #endif
 643                         "xattrs",
 644
 645 #ifdef RSYNC_USE_PROTECTED_ARGS
 646                 "default "
 647 #else
 648                 "optional "
 649 #endif
 650                         "protect-args",
 651
 652 #ifndef ICONV_OPTION
 653                 "no "
 654 #endif
 655                         "iconv",
 656
 657 #ifndef CAN_SET_SYMLINK_TIMES
 658                 "no "
 659 #endif
 660                         "symtimes",
 661
 662 #ifndef SUPPORT_PREALLOCATION
 663                 "no "
 664 #endif
 665                         "prealloc",
 666
 667         "*Optimizations",
 668
 669 #ifndef HAVE_SIMD
 670                 "no "
 671 #endif
 672                         "SIMD",
 673
 674 #ifndef HAVE_ASM
 675                 "no "
 676 #endif
 677                         "asm",
 678
 679 #ifndef USE_OPENSSL
 680                 "no "
 681 #endif
 682                         "openssl-crypto",
 683
 684                 NULL
 685         };
 686
 687         for (line_len = 0, j = 0; ; j++) {
 688                 char *str = info_flags[j], *next_nfo = str ? info_flags[j+1] : NULL;
 689                 int str_len = str && *str != '*' ? strlen(str) : 1000;
 690                 int need_comma = next_nfo && *next_nfo != '*' ? 1 : 0;
 691                 if (line_len && line_len + 1 + str_len + need_comma >= (int)sizeof line_buf) {
 692                         rprintf(f, "   %s\n", line_buf);
 693                         line_len = 0;
 694                 }
 695                 if (!str)
 696                         break;
 697                 if (*str == '*') {
 698                         rprintf(f, "%s:\n", str+1);
 699                         continue;
 700                 }
 701                 line_len += snprintf(line_buf+line_len, sizeof line_buf - line_len, " %s%s", str, need_comma ? "," : "");
 702         }
 703 }
 704
 705 static void print_rsync_version(enum logcode f)
 706 {
 707         char tmpbuf[256], *subprotocol = "";
 708
 709 #if SUBPROTOCOL_VERSION != 0
 710         subprotocol = istring(".PR%d", SUBPROTOCOL_VERSION);
 711 #endif
 712         rprintf(f, "%s  version %s  protocol version %d%s\n",
 713                 RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION, subprotocol);
 714
 715         rprintf(f, "Copyright (C) 1996-" LATEST_YEAR " by Andrew Tridgell, Wayne Davison, and others.\n");
 716         rprintf(f, "Web site: https://rsync.samba.org/\n");
 717
 718         print_info_flags(f);
 719
 720         rprintf(f, "Checksum list:\n");
 721         get_default_nno_list(&valid_checksums, tmpbuf, sizeof tmpbuf, '(');
 722         rprintf(f, "    %s\n", tmpbuf);
 723
 724         rprintf(f, "Compress list:\n");
 725         get_default_nno_list(&valid_compressions, tmpbuf, sizeof tmpbuf, '(');
 726         rprintf(f, "    %s\n", tmpbuf);
 727
 728 #ifdef MAINTAINER_MODE
 729         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
 730 #endif
 731
 732 #if SIZEOF_INT64 < 8
 733         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
 734 #endif
 735         if (sizeof (int64) != SIZEOF_INT64) {
 736                 rprintf(f,
 737                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
 738                         (int) SIZEOF_INT64, (int) sizeof (int64));
 739         }
 740
 741         rprintf(f,"\n");
 742         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
 743         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
 744         rprintf(f,"General Public Licence for details.\n");
 745 }
 746
 747
 748 void usage(enum logcode F)
 749 {
 750   print_rsync_version(F);
 751
 752   rprintf(F,"\n");
 753   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
 754   rprintf(F,"via a fast differencing algorithm.\n");
 755
 756   rprintf(F,"\n");
 757   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
 758   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
 759   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
 760   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
 761   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
 762   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
 763   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
 764   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
 765   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
 766   rprintf(F,"\n");
 767   rprintf(F,"Options\n");
 768 #include "help-rsync.h"
 769   rprintf(F,"\n");
 770   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
 771   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
 772   rprintf(F,"See https://rsync.samba.org/ for updates, bug reports, and answers\n");
 773 }
 774
 775 enum {OPT_SERVER = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
 776       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
 777       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
 778       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
 779       OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, OPT_INFO, OPT_DEBUG,
 780       OPT_USERMAP, OPT_GROUPMAP, OPT_CHOWN, OPT_BWLIMIT,
 781       OPT_OLD_COMPRESS, OPT_NEW_COMPRESS, OPT_NO_COMPRESS,
 782       OPT_REFUSED_BASE = 9000};
 783
 784 static struct poptOption long_options[] = {
 785   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
 786   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
 787   {"version",         'V', POPT_ARG_NONE,   0, 'V', 0, 0},
 788   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
 789   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 790   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
 791   {"info",             0,  POPT_ARG_STRING, 0, OPT_INFO, 0, 0 },
 792   {"debug",            0,  POPT_ARG_STRING, 0, OPT_DEBUG, 0, 0 },
 793   {"msgs2stderr",      0,  POPT_ARG_NONE,   &msgs2stderr, 0, 0, 0 },
 794   {"no-msgs2stderr",   0,  POPT_ARG_VAL,    &msgs2stderr, 0, 0, 0 },
 795   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
 796   {"motd",             0,  POPT_ARG_VAL,    &output_motd, 1, 0, 0 },
 797   {"no-motd",          0,  POPT_ARG_VAL,    &output_motd, 0, 0, 0 },
 798   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
 799   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
 800   {"no-human-readable",0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 801   {"no-h",             0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
 802   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
 803   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
 804   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
 805   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 806   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
 807   {"inc-recursive",    0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 808   {"no-inc-recursive", 0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 809   {"i-r",              0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
 810   {"no-i-r",           0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
 811   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
 812   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 813   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
 814   {"old-dirs",         0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 815   {"old-d",            0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
 816   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
 817   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 818   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
 819   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
 820   {"acls",            'A', POPT_ARG_NONE,   0, 'A', 0, 0 },
 821   {"no-acls",          0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 822   {"no-A",             0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
 823   {"xattrs",          'X', POPT_ARG_NONE,   0, 'X', 0, 0 },
 824   {"no-xattrs",        0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 825   {"no-X",             0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
 826   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
 827   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 828   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
 829   {"atimes",          'U', POPT_ARG_NONE,   0, 'U', 0, 0 },
 830   {"no-atimes",        0,  POPT_ARG_VAL,    &preserve_atimes, 0, 0, 0 },
 831   {"no-U",             0,  POPT_ARG_VAL,    &preserve_atimes, 0, 0, 0 },
 832   {"open-noatime",     0,  POPT_ARG_VAL,    &open_noatime, 1, 0, 0 },
 833   {"no-open-noatime",  0,  POPT_ARG_VAL,    &open_noatime, 0, 0, 0 },
 834   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 1, 0, 0 },
 835   {"no-omit-dir-times",0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 836   {"no-O",             0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
 837   {"omit-link-times", 'J', POPT_ARG_VAL,    &omit_link_times, 1, 0, 0 },
 838   {"no-omit-link-times",0, POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 839   {"no-J",             0,  POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
 840   {"modify-window",   '@', POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
 841   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
 842   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
 843   {"fake-super",       0,  POPT_ARG_VAL,    &am_root, -1, 0, 0 },
 844   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
 845   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 846   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
 847   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
 848   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 849   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
 850   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
 851   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
 852   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
 853   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
 854   {"write-devices",    0,  POPT_ARG_VAL,    &write_devices, 1, 0, 0 },
 855   {"no-write-devices", 0,  POPT_ARG_VAL,    &write_devices, 0, 0, 0 },
 856   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
 857   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
 858   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
 859   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 860   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
 861   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
 862   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
 863   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
 864   {"munge-links",      0,  POPT_ARG_VAL,    &munge_symlinks, 1, 0, 0 },
 865   {"no-munge-links",   0,  POPT_ARG_VAL,    &munge_symlinks, 0, 0, 0 },
 866   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
 867   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
 868   {"hard-links",      'H', POPT_ARG_NONE,   0, 'H', 0, 0 },
 869   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 870   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
 871   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
 872   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 873   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
 874   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 875   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 876   {"i-d",              0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
 877   {"no-i-d",           0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
 878   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
 879   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
 880   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
 881   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
 882   {"no-one-file-system",0, POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 883   {"no-x",             0,  POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
 884   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
 885   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 886   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
 887   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
 888   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
 889   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
 890   {"max-alloc",        0,  POPT_ARG_STRING, &max_alloc_arg, 0, 0, 0 },
 891   {"sparse",          'S', POPT_ARG_VAL,    &sparse_files, 1, 0, 0 },
 892   {"no-sparse",        0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 893   {"no-S",             0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
 894   {"preallocate",      0,  POPT_ARG_NONE,   &preallocate_files, 0, 0, 0},
 895   {"inplace",          0,  POPT_ARG_VAL,    &inplace, 1, 0, 0 },
 896   {"no-inplace",       0,  POPT_ARG_VAL,    &inplace, 0, 0, 0 },
 897   {"append",           0,  POPT_ARG_NONE,   0, OPT_APPEND, 0, 0 },
 898   {"append-verify",    0,  POPT_ARG_VAL,    &append_mode, 2, 0, 0 },
 899   {"no-append",        0,  POPT_ARG_VAL,    &append_mode, 0, 0, 0 },
 900   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
 901   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
 902   {"delete-before",    0,  POPT_ARG_NONE,   &delete_before, 0, 0, 0 },
 903   {"delete-during",    0,  POPT_ARG_VAL,    &delete_during, 1, 0, 0 },
 904   {"delete-delay",     0,  POPT_ARG_VAL,    &delete_during, 2, 0, 0 },
 905   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
 906   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
 907   {"delete-missing-args",0,POPT_BIT_SET,    &missing_args, 2, 0, 0 },
 908   {"ignore-missing-args",0,POPT_BIT_SET,    &missing_args, 1, 0, 0 },
 909   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_source_files, 2, 0, 0 }, /* deprecated */
 910   {"remove-source-files",0,POPT_ARG_VAL,    &remove_source_files, 1, 0, 0 },
 911   {"force",            0,  POPT_ARG_VAL,    &force_delete, 1, 0, 0 },
 912   {"no-force",         0,  POPT_ARG_VAL,    &force_delete, 0, 0, 0 },
 913   {"ignore-errors",    0,  POPT_ARG_VAL,    &ignore_errors, 1, 0, 0 },
 914   {"no-ignore-errors", 0,  POPT_ARG_VAL,    &ignore_errors, 0, 0, 0 },
 915   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
 916   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
 917   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
 918   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
 919   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
 920   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
 921   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
 922   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
 923   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
 924   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 925   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
 926   {"checksum",        'c', POPT_ARG_VAL,    &always_checksum, 1, 0, 0 },
 927   {"no-checksum",      0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 928   {"no-c",             0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
 929   {"checksum-choice",  0,  POPT_ARG_STRING, &checksum_choice, 0, 0, 0 },
 930   {"cc",               0,  POPT_ARG_STRING, &checksum_choice, 0, 0, 0 },
 931   {"block-size",      'B', POPT_ARG_LONG,   &block_size, 0, 0, 0 },
 932   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
 933   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
 934   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
 935   {"fuzzy",           'y', POPT_ARG_NONE,   0, 'y', 0, 0 },
 936   {"no-fuzzy",         0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 937   {"no-y",             0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
 938   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
 939   {"old-compress",     0,  POPT_ARG_NONE,   0, OPT_OLD_COMPRESS, 0, 0 },
 940   {"new-compress",     0,  POPT_ARG_NONE,   0, OPT_NEW_COMPRESS, 0, 0 },
 941   {"no-compress",      0,  POPT_ARG_NONE,   0, OPT_NO_COMPRESS, 0, 0 },
 942   {"no-z",             0,  POPT_ARG_NONE,   0, OPT_NO_COMPRESS, 0, 0 },
 943   {"compress-choice",  0,  POPT_ARG_STRING, &compress_choice, 0, 0, 0 },
 944   {"zc",               0,  POPT_ARG_STRING, &compress_choice, 0, 0, 0 },
 945   {"skip-compress",    0,  POPT_ARG_STRING, &skip_compress, 0, 0, 0 },
 946   {"compress-level",   0,  POPT_ARG_INT,    &do_compression_level, 0, 0, 0 },
 947   {"zl",               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 /* If the size_arg is an invalid string or the value is < min_value, an error
1254  * is put into err_buf & the return is -1.  Note that this parser does NOT
1255  * support negative numbers, so a min_value < 0 doesn't make any sense. */
1256 static ssize_t parse_size_arg(char *size_arg, char def_suf, const char *opt_name, ssize_t min_value)
1257 {
1258         int reps, mult;
1259         const char *arg, *err = "invalid";
1260         ssize_t size = 1;
1261
1262         for (arg = size_arg; isDigit(arg); arg++) {}
1263         if (*arg == '.')
1264                 for (arg++; isDigit(arg); arg++) {}
1265         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
1266         case 'b': case 'B':
1267                 reps = 0;
1268                 break;
1269         case 'k': case 'K':
1270                 reps = 1;
1271                 break;
1272         case 'm': case 'M':
1273                 reps = 2;
1274                 break;
1275         case 'g': case 'G':
1276                 reps = 3;
1277                 break;
1278         case 't': case 'T':
1279                 reps = 4;
1280                 break;
1281         case 'p': case 'P':
1282                 reps = 5;
1283                 break;
1284         default:
1285                 goto failure;
1286         }
1287         if (*arg == 'b' || *arg == 'B')
1288                 mult = 1000, arg++;
1289         else if (!*arg || *arg == '+' || *arg == '-')
1290                 mult = 1024;
1291         else if (strncasecmp(arg, "ib", 2) == 0)
1292                 mult = 1024, arg += 2;
1293         else
1294                 goto failure;
1295         while (reps--)
1296                 size *= mult;
1297         size *= atof(size_arg);
1298         if ((*arg == '+' || *arg == '-') && arg[1] == '1' && arg != size_arg)
1299                 size += atoi(arg), arg += 2;
1300         if (*arg)
1301                 goto failure;
1302         if (size < min_value) {
1303                 err = size < 0 ? "too big" : "too small";
1304                 goto failure;
1305         }
1306         return size;
1307
1308 failure:
1309         snprintf(err_buf, sizeof err_buf, "--%s value is %s: %s\n", opt_name, err, size_arg);
1310         return -1;
1311 }
1312
1313 static void create_refuse_error(int which)
1314 {
1315         const char *msg;
1316         if (am_daemon)
1317                 msg = "The server is configured to refuse";
1318         else if (am_server)
1319                 msg = "The server does not support";
1320         else
1321                 msg = "This rsync does not support";
1322
1323         /* The "which" value is the index + OPT_REFUSED_BASE. */
1324         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
1325         int n = snprintf(err_buf, sizeof err_buf, "%s --%s\n", msg, op->longName) - 1;
1326         if (op->shortName)
1327                 snprintf(err_buf + n, sizeof err_buf - n, " (-%c)\n", op->shortName);
1328 }
1329
1330 /* This is used to make sure that --daemon & --server cannot be aliased to
1331  * something else. These options have always disabled popt aliases for the
1332  * parsing of a daemon or server command-line, but we have to make sure that
1333  * these options cannot vanish so that the alias disabling can take effect. */
1334 static void popt_unalias(poptContext con, const char *opt)
1335 {
1336         struct poptAlias unalias;
1337
1338         memset(&unalias, 0, sizeof unalias);
1339
1340         unalias.longName = opt + 2; /* point past the leading "--" */
1341         unalias.argc = 1;
1342         unalias.argv = new_array0(const char*, 2);
1343         unalias.argv[0] = strdup(opt);
1344
1345         poptAddAlias(con, unalias, 0);
1346 }
1347
1348 char *alt_dest_opt(int type)
1349 {
1350         if (!type)
1351                 type = alt_dest_type;
1352
1353         switch (type) {
1354         case COMPARE_DEST:
1355                 return "--compare-dest";
1356         case COPY_DEST:
1357                 return "--copy-dest";
1358         case LINK_DEST:
1359                 return "--link-dest";
1360         default:
1361                 assert(0);
1362         }
1363 }
1364
1365 /**
1366  * Process command line arguments.  Called on both local and remote.
1367  *
1368  * @retval 1 if all options are OK; with globals set to appropriate
1369  * values
1370  *
1371  * @retval 0 on error, with err_buf containing an explanation
1372  **/
1373 int parse_arguments(int *argc_p, const char ***argv_p)
1374 {
1375         static poptContext pc;
1376         const char *arg, **argv = *argv_p;
1377         int argc = *argc_p;
1378         int opt, want_dest_type;
1379         int orig_protect_args = protect_args;
1380
1381         if (argc == 0) {
1382                 strlcpy(err_buf, "argc is zero!\n", sizeof err_buf);
1383                 return 0;
1384         }
1385
1386         set_refuse_options();
1387
1388 #ifdef ICONV_OPTION
1389         if (!am_daemon && protect_args <= 0 && (arg = getenv("RSYNC_ICONV")) != NULL && *arg)
1390                 iconv_opt = strdup(arg);
1391 #endif
1392
1393         /* TODO: Call poptReadDefaultConfig; handle errors. */
1394
1395         /* The context leaks in case of an error, but if there's a
1396          * problem we always exit anyhow. */
1397         if (pc)
1398                 poptFreeContext(pc);
1399         pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1400         if (!am_server) {
1401                 poptReadDefaultConfig(pc, 0);
1402                 popt_unalias(pc, "--daemon");
1403                 popt_unalias(pc, "--server");
1404         }
1405
1406         while ((opt = poptGetNextOpt(pc)) != -1) {
1407                 /* most options are handled automatically by popt;
1408                  * only special cases are returned and listed here. */
1409
1410                 switch (opt) {
1411                 case 'V':
1412                         version_opt_cnt++;
1413                         break;
1414
1415                 case OPT_SERVER:
1416                         if (!am_server) {
1417                                 /* Disable popt aliases on the server side and
1418                                  * then start parsing the options again. */
1419                                 poptFreeContext(pc);
1420                                 pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1421                                 am_server = 1;
1422                         }
1423 #ifdef ICONV_OPTION
1424                         iconv_opt = NULL;
1425 #endif
1426                         break;
1427
1428                 case OPT_SENDER:
1429                         if (!am_server) {
1430                                 usage(FERROR);
1431                                 exit_cleanup(RERR_SYNTAX);
1432                         }
1433                         am_sender = 1;
1434                         break;
1435
1436                 case OPT_DAEMON:
1437                         if (am_daemon) {
1438                                 strlcpy(err_buf,
1439                                         "Attempt to hack rsync thwarted!\n",
1440                                         sizeof err_buf);
1441                                 return 0;
1442                         }
1443 #ifdef ICONV_OPTION
1444                         iconv_opt = NULL;
1445 #endif
1446                         protect_args = 0;
1447                         poptFreeContext(pc);
1448                         pc = poptGetContext(RSYNC_NAME, argc, argv, long_daemon_options, 0);
1449                         while ((opt = poptGetNextOpt(pc)) != -1) {
1450                                 char **cpp;
1451                                 switch (opt) {
1452                                 case 'h':
1453                                         daemon_usage(FINFO);
1454                                         exit_cleanup(0);
1455
1456                                 case 'M':
1457                                         arg = poptGetOptArg(pc);
1458                                         if (!strchr(arg, '=')) {
1459                                                 rprintf(FERROR,
1460                                                         "--dparam value is missing an '=': %s\n",
1461                                                         arg);
1462                                                 goto daemon_error;
1463                                         }
1464                                         cpp = EXPAND_ITEM_LIST(&dparam_list, char *, 4);
1465                                         *cpp = strdup(arg);
1466                                         break;
1467
1468                                 case 'v':
1469                                         verbose++;
1470                                         break;
1471
1472                                 default:
1473                                         rprintf(FERROR,
1474                                                 "rsync: %s: %s (in daemon mode)\n",
1475                                                 poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1476                                                 poptStrerror(opt));
1477                                         goto daemon_error;
1478                                 }
1479                         }
1480
1481                         if (dparam_list.count && !set_dparams(1))
1482                                 exit_cleanup(RERR_SYNTAX);
1483
1484                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1485                                 snprintf(err_buf, sizeof err_buf,
1486                                          "the --temp-dir path is WAY too long.\n");
1487                                 return 0;
1488                         }
1489
1490                         if (!daemon_opt) {
1491                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
1492                             daemon_error:
1493                                 rprintf(FERROR, "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
1494                                 exit_cleanup(RERR_SYNTAX);
1495                         }
1496
1497                         *argv_p = argv = poptGetArgs(pc);
1498                         *argc_p = argc = count_args(argv);
1499                         am_starting_up = 0;
1500                         daemon_opt = 0;
1501                         am_daemon = 1;
1502                         return 1;
1503
1504                 case OPT_MODIFY_WINDOW:
1505                         /* The value has already been set by popt, but
1506                          * we need to remember that we're using a
1507                          * non-default setting. */
1508                         modify_window_set = 1;
1509                         break;
1510
1511                 case OPT_FILTER:
1512                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1513                                         rule_template(0), 0);
1514                         break;
1515
1516                 case OPT_EXCLUDE:
1517                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1518                                         rule_template(0), XFLG_OLD_PREFIXES);
1519                         break;
1520
1521                 case OPT_INCLUDE:
1522                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1523                                         rule_template(FILTRULE_INCLUDE), XFLG_OLD_PREFIXES);
1524                         break;
1525
1526                 case OPT_EXCLUDE_FROM:
1527                 case OPT_INCLUDE_FROM:
1528                         arg = poptGetOptArg(pc);
1529                         if (sanitize_paths)
1530                                 arg = sanitize_path(NULL, arg, NULL, 0, SP_DEFAULT);
1531                         if (daemon_filter_list.head) {
1532                                 int rej;
1533                                 char *cp = strdup(arg);
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_option_cnt)
1658                                         remote_options[0] = "ARG0";
1659                         }
1660                         remote_options[++remote_option_cnt] = arg;
1661                         remote_options[remote_option_cnt+1] = NULL;
1662                         break;
1663
1664                 case OPT_WRITE_BATCH:
1665                         /* batch_name is already set */
1666                         write_batch = 1;
1667                         break;
1668
1669                 case OPT_ONLY_WRITE_BATCH:
1670                         /* batch_name is already set */
1671                         write_batch = -1;
1672                         break;
1673
1674                 case OPT_READ_BATCH:
1675                         /* batch_name is already set */
1676                         read_batch = 1;
1677                         break;
1678
1679                 case OPT_NO_ICONV:
1680 #ifdef ICONV_OPTION
1681                         iconv_opt = NULL;
1682 #endif
1683                         break;
1684
1685                 case OPT_MAX_SIZE:
1686                         if ((max_size = parse_size_arg(max_size_arg, 'b', "max-size", 0)) < 0)
1687                                 return 0;
1688                         max_size_arg = num_to_byte_string(max_size);
1689                         break;
1690
1691                 case OPT_MIN_SIZE:
1692                         if ((min_size = parse_size_arg(min_size_arg, 'b', "min-size", 0)) < 0)
1693                                 return 0;
1694                         min_size_arg = num_to_byte_string(min_size);
1695                         break;
1696
1697                 case OPT_BWLIMIT: {
1698                         ssize_t size = parse_size_arg(bwlimit_arg, 'K', "bwlimit", 512);
1699                         if (size < 0)
1700                                 return 0;
1701                         bwlimit_arg = num_to_byte_string(size);
1702                         bwlimit = (size + 512) / 1024;
1703                         break;
1704                 }
1705
1706                 case OPT_APPEND:
1707                         if (am_server)
1708                                 append_mode++;
1709                         else
1710                                 append_mode = 1;
1711                         break;
1712
1713                 case OPT_LINK_DEST:
1714                         want_dest_type = LINK_DEST;
1715                         goto set_dest_dir;
1716
1717                 case OPT_COPY_DEST:
1718                         want_dest_type = COPY_DEST;
1719                         goto set_dest_dir;
1720
1721                 case OPT_COMPARE_DEST:
1722                         want_dest_type = COMPARE_DEST;
1723
1724                 set_dest_dir:
1725                         if (alt_dest_type && alt_dest_type != want_dest_type) {
1726                                 snprintf(err_buf, sizeof err_buf,
1727                                         "ERROR: the %s option conflicts with the %s option\n",
1728                                         alt_dest_opt(want_dest_type), alt_dest_opt(0));
1729                                 return 0;
1730                         }
1731                         alt_dest_type = want_dest_type;
1732
1733                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1734                                 snprintf(err_buf, sizeof err_buf,
1735                                         "ERROR: at most %d %s args may be specified\n",
1736                                         MAX_BASIS_DIRS, alt_dest_opt(0));
1737                                 return 0;
1738                         }
1739                         /* We defer sanitizing this arg until we know what
1740                          * our destination directory is going to be. */
1741                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1742                         break;
1743
1744                 case OPT_CHMOD:
1745                         arg = poptGetOptArg(pc);
1746                         if (!parse_chmod(arg, &chmod_modes)) {
1747                                 snprintf(err_buf, sizeof err_buf,
1748                                         "Invalid argument passed to --chmod (%s)\n",
1749                                         arg);
1750                                 return 0;
1751                         }
1752                         break;
1753
1754                 case OPT_INFO:
1755                         arg = poptGetOptArg(pc);
1756                         parse_output_words(info_words, info_levels, arg, USER_PRIORITY);
1757                         break;
1758
1759                 case OPT_DEBUG:
1760                         arg = poptGetOptArg(pc);
1761                         parse_output_words(debug_words, debug_levels, arg, USER_PRIORITY);
1762                         break;
1763
1764                 case OPT_USERMAP:
1765                         if (usermap) {
1766                                 if (usermap_via_chown) {
1767                                         snprintf(err_buf, sizeof err_buf,
1768                                                 "--usermap conflicts with prior --chown.\n");
1769                                         return 0;
1770                                 }
1771                                 snprintf(err_buf, sizeof err_buf,
1772                                         "You can only specify --usermap once.\n");
1773                                 return 0;
1774                         }
1775                         usermap = (char *)poptGetOptArg(pc);
1776                         usermap_via_chown = False;
1777                         break;
1778
1779                 case OPT_GROUPMAP:
1780                         if (groupmap) {
1781                                 if (groupmap_via_chown) {
1782                                         snprintf(err_buf, sizeof err_buf,
1783                                                 "--groupmap conflicts with prior --chown.\n");
1784                                         return 0;
1785                                 }
1786                                 snprintf(err_buf, sizeof err_buf,
1787                                         "You can only specify --groupmap once.\n");
1788                                 return 0;
1789                         }
1790                         groupmap = (char *)poptGetOptArg(pc);
1791                         groupmap_via_chown = False;
1792                         break;
1793
1794                 case OPT_CHOWN: {
1795                         const char *chown = poptGetOptArg(pc);
1796                         int len;
1797                         if ((arg = strchr(chown, ':')) != NULL)
1798                                 len = arg++ - chown;
1799                         else
1800                                 len = strlen(chown);
1801                         if (len) {
1802                                 if (usermap) {
1803                                         if (!usermap_via_chown) {
1804                                                 snprintf(err_buf, sizeof err_buf,
1805                                                         "--chown conflicts with prior --usermap.\n");
1806                                                 return 0;
1807                                         }
1808                                         snprintf(err_buf, sizeof err_buf,
1809                                                 "You can only specify a user-affecting --chown once.\n");
1810                                         return 0;
1811                                 }
1812                                 if (asprintf(&usermap, "*:%.*s", len, chown) < 0)
1813                                         out_of_memory("parse_arguments");
1814                                 usermap_via_chown = True;
1815                         }
1816                         if (arg && *arg) {
1817                                 if (groupmap) {
1818                                         if (!groupmap_via_chown) {
1819                                                 snprintf(err_buf, sizeof err_buf,
1820                                                         "--chown conflicts with prior --groupmap.\n");
1821                                                 return 0;
1822                                         }
1823                                         snprintf(err_buf, sizeof err_buf,
1824                                                 "You can only specify a group-affecting --chown once.\n");
1825                                         return 0;
1826                                 }
1827                                 if (asprintf(&groupmap, "*:%s", arg) < 0)
1828                                         out_of_memory("parse_arguments");
1829                                 groupmap_via_chown = True;
1830                         }
1831                         break;
1832                 }
1833
1834                 case OPT_HELP:
1835                         usage(FINFO);
1836                         exit_cleanup(0);
1837
1838                 case 'A':
1839 #ifdef SUPPORT_ACLS
1840                         preserve_acls = 1;
1841                         preserve_perms = 1;
1842                         break;
1843 #else
1844                         /* FIXME: this should probably be ignored with a
1845                          * warning and then countermeasures taken to
1846                          * restrict group and other access in the presence
1847                          * of any more restrictive ACLs, but this is safe
1848                          * for now */
1849                         snprintf(err_buf,sizeof(err_buf),
1850                                  "ACLs are not supported on this %s\n",
1851                                  am_server ? "server" : "client");
1852                         return 0;
1853 #endif
1854
1855                 case 'X':
1856 #ifdef SUPPORT_XATTRS
1857                         preserve_xattrs++;
1858                         break;
1859 #else
1860                         snprintf(err_buf,sizeof(err_buf),
1861                                  "extended attributes are not supported on this %s\n",
1862                                  am_server ? "server" : "client");
1863                         return 0;
1864 #endif
1865
1866                 default:
1867                         /* A large opt value means that set_refuse_options()
1868                          * turned this option off. */
1869                         if (opt >= OPT_REFUSED_BASE) {
1870                                 create_refuse_error(opt);
1871                                 return 0;
1872                         }
1873                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
1874                                  am_server ? "on remote machine: " : "",
1875                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1876                                  poptStrerror(opt));
1877                         return 0;
1878                 }
1879         }
1880
1881         if (version_opt_cnt) {
1882                 print_rsync_version(FINFO);
1883                 exit_cleanup(0);
1884         }
1885
1886         if (!max_alloc_arg) {
1887                 max_alloc_arg = getenv("RSYNC_MAX_ALLOC");
1888                 if (max_alloc_arg && !*max_alloc_arg)
1889                         max_alloc_arg = NULL;
1890         }
1891         if (max_alloc_arg) {
1892                 ssize_t size = parse_size_arg(max_alloc_arg, 'B', "max-alloc", 1024*1024);
1893                 if (size < 0)
1894                         return 0;
1895                 max_alloc = size;
1896         }
1897
1898         if (protect_args < 0) {
1899                 if (am_server)
1900                         protect_args = 0;
1901                 else if ((arg = getenv("RSYNC_PROTECT_ARGS")) != NULL && *arg)
1902                         protect_args = atoi(arg) ? 1 : 0;
1903                 else {
1904 #ifdef RSYNC_USE_PROTECTED_ARGS
1905                         protect_args = 1;
1906 #else
1907                         protect_args = 0;
1908 #endif
1909                 }
1910         }
1911
1912         if (checksum_choice && strcasecmp(checksum_choice, "auto") != 0 && strcasecmp(checksum_choice, "auto,auto") != 0) {
1913                 /* Call this early to verify the args and figure out if we need to force
1914                  * --whole-file. Note that the parse function will get called again later,
1915                  * just in case an "auto" choice needs to know the protocol_version. */
1916                 parse_checksum_choice(0);
1917         } else
1918                 checksum_choice = NULL;
1919
1920         if (human_readable > 1 && argc == 2 && !am_server) {
1921                 /* Allow the old meaning of 'h' (--help) on its own. */
1922                 usage(FINFO);
1923                 exit_cleanup(0);
1924         }
1925
1926         if (!compress_choice && do_compression > 1)
1927                 compress_choice = "zlibx";
1928         if (compress_choice && strcasecmp(compress_choice, "auto") != 0)
1929                 parse_compress_choice(0); /* Twiddles do_compression and can possibly NULL-out compress_choice. */
1930         else
1931                 compress_choice = NULL;
1932
1933         if (do_compression || do_compression_level != CLVL_NOT_SPECIFIED) {
1934                 if (!do_compression)
1935                         do_compression = CPRES_AUTO;
1936                 if (do_compression && refused_compress) {
1937                         create_refuse_error(refused_compress);
1938                         return 0;
1939                 }
1940         }
1941
1942 #ifdef HAVE_SETVBUF
1943         if (outbuf_mode && !am_server) {
1944                 int mode = *(uchar *)outbuf_mode;
1945                 if (islower(mode))
1946                         mode = toupper(mode);
1947                 fflush(stdout); /* Just in case... */
1948                 switch (mode) {
1949                 case 'N': /* None */
1950                 case 'U': /* Unbuffered */
1951                         mode = _IONBF;
1952                         break;
1953                 case 'L': /* Line */
1954                         mode = _IOLBF;
1955                         break;
1956                 case 'B': /* Block */
1957                 case 'F': /* Full */
1958                         mode = _IOFBF;
1959                         break;
1960                 default:
1961                         snprintf(err_buf, sizeof err_buf,
1962                                 "Invalid --outbuf setting -- specify N, L, or B.\n");
1963                         return 0;
1964                 }
1965                 setvbuf(stdout, (char *)NULL, mode, 0);
1966         }
1967
1968         if (msgs2stderr) {
1969                 /* Make stderr line buffered for better sharing of the stream. */
1970                 fflush(stderr); /* Just in case... */
1971                 setvbuf(stderr, (char *)NULL, _IOLBF, 0);
1972         }
1973 #endif
1974
1975         set_output_verbosity(verbose, DEFAULT_PRIORITY);
1976
1977         if (do_stats) {
1978                 parse_output_words(info_words, info_levels,
1979                         verbose > 1 ? "stats3" : "stats2", DEFAULT_PRIORITY);
1980         }
1981
1982 #ifdef ICONV_OPTION
1983         if (iconv_opt && protect_args != 2) {
1984                 if (!am_server && strcmp(iconv_opt, "-") == 0)
1985                         iconv_opt = NULL;
1986                 else
1987                         need_unsorted_flist = 1;
1988         }
1989         if (refused_no_iconv && !iconv_opt) {
1990                 create_refuse_error(refused_no_iconv);
1991                 return 0;
1992         }
1993 #endif
1994
1995         if (fuzzy_basis > 1)
1996                 fuzzy_basis = basis_dir_cnt + 1;
1997
1998         /* Don't let the client reset protect_args if it was already processed */
1999         if (orig_protect_args == 2 && am_server)
2000                 protect_args = orig_protect_args;
2001
2002         if (protect_args == 1 && am_server)
2003                 return 1;
2004
2005         *argv_p = argv = poptGetArgs(pc);
2006         *argc_p = argc = count_args(argv);
2007
2008 #ifndef SUPPORT_LINKS
2009         if (preserve_links && !am_sender) {
2010                 snprintf(err_buf, sizeof err_buf,
2011                          "symlinks are not supported on this %s\n",
2012                          am_server ? "server" : "client");
2013                 return 0;
2014         }
2015 #endif
2016
2017 #ifndef SUPPORT_HARD_LINKS
2018         if (preserve_hard_links) {
2019                 snprintf(err_buf, sizeof err_buf,
2020                          "hard links are not supported on this %s\n",
2021                          am_server ? "server" : "client");
2022                 return 0;
2023         }
2024 #endif
2025
2026 #ifdef SUPPORT_XATTRS
2027         if (am_root < 0 && preserve_xattrs > 1) {
2028                 snprintf(err_buf, sizeof err_buf,
2029                          "--fake-super conflicts with -XX\n");
2030                 return 0;
2031         }
2032 #else
2033         if (am_root < 0) {
2034                 snprintf(err_buf, sizeof err_buf,
2035                          "--fake-super requires an rsync with extended attributes enabled\n");
2036                 return 0;
2037         }
2038 #endif
2039
2040         if (block_size) {
2041                 /* We may not know the real protocol_version at this point if this is the client
2042                  * option parsing, but we still want to check it so that the client can specify
2043                  * a --protocol=29 option with a larger block size. */
2044                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
2045
2046                 if (block_size > max_blength) {
2047                         snprintf(err_buf, sizeof err_buf,
2048                                  "--block-size=%lu is too large (max: %u)\n", block_size, max_blength);
2049                         return 0;
2050                 }
2051         }
2052
2053         if (write_batch && read_batch) {
2054                 snprintf(err_buf, sizeof err_buf,
2055                         "--write-batch and --read-batch can not be used together\n");
2056                 return 0;
2057         }
2058         if (write_batch > 0 || read_batch) {
2059                 if (am_server) {
2060                         rprintf(FINFO,
2061                                 "ignoring --%s-batch option sent to server\n",
2062                                 write_batch ? "write" : "read");
2063                         /* We don't actually exit_cleanup(), so that we can
2064                          * still service older version clients that still send
2065                          * batch args to server. */
2066                         read_batch = write_batch = 0;
2067                         batch_name = NULL;
2068                 } else if (dry_run)
2069                         write_batch = 0;
2070         } else if (write_batch < 0 && dry_run)
2071                 write_batch = 0;
2072         if (read_batch && files_from) {
2073                 snprintf(err_buf, sizeof err_buf,
2074                         "--read-batch cannot be used with --files-from\n");
2075                 return 0;
2076         }
2077         if (read_batch && remove_source_files) {
2078                 snprintf(err_buf, sizeof err_buf,
2079                         "--read-batch cannot be used with --remove-%s-files\n",
2080                         remove_source_files == 1 ? "source" : "sent");
2081                 return 0;
2082         }
2083         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
2084                 snprintf(err_buf, sizeof err_buf,
2085                         "the batch-file name must be %d characters or less.\n",
2086                         MAX_BATCH_NAME_LEN);
2087                 return 0;
2088         }
2089
2090         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
2091                 snprintf(err_buf, sizeof err_buf,
2092                          "the --temp-dir path is WAY too long.\n");
2093                 return 0;
2094         }
2095
2096         if (max_delete < 0 && max_delete != INT_MIN) {
2097                 /* Negative numbers are treated as "no deletions". */
2098                 max_delete = 0;
2099         }
2100
2101         if (files_from) {
2102                 if (recurse == 1) /* preserve recurse == 2 */
2103                         recurse = 0;
2104                 if (xfer_dirs < 0)
2105                         xfer_dirs = 1;
2106         }
2107
2108         if (argc < 2 && !read_batch && !am_server)
2109                 list_only |= 1;
2110
2111         if (xfer_dirs >= 4) {
2112                 parse_filter_str(&filter_list, "- /*/*", rule_template(0), 0);
2113                 recurse = xfer_dirs = 1;
2114         } else if (recurse)
2115                 xfer_dirs = 1;
2116         else if (xfer_dirs < 0)
2117                 xfer_dirs = list_only ? 1 : 0;
2118
2119         if (relative_paths < 0)
2120                 relative_paths = files_from? 1 : 0;
2121         if (!relative_paths)
2122                 implied_dirs = 0;
2123
2124         if (delete_before + !!delete_during + delete_after > 1) {
2125                 snprintf(err_buf, sizeof err_buf,
2126                         "You may not combine multiple --delete-WHEN options.\n");
2127                 return 0;
2128         }
2129         if (delete_before || delete_during || delete_after)
2130                 delete_mode = 1;
2131         else if (delete_mode || delete_excluded) {
2132                 /* Only choose now between before & during if one is refused. */
2133                 if (refused_delete_before) {
2134                         if (!refused_delete_during)
2135                                 delete_during = 1;
2136                         else {
2137                                 create_refuse_error(refused_delete_before);
2138                                 return 0;
2139                         }
2140                 } else if (refused_delete_during)
2141                         delete_before = 1;
2142                 delete_mode = 1;
2143         }
2144         if (!xfer_dirs && delete_mode) {
2145                 snprintf(err_buf, sizeof err_buf,
2146                         "--delete does not work without --recursive (-r) or --dirs (-d).\n");
2147                 return 0;
2148         }
2149
2150         if (missing_args == 3) /* simplify if both options were specified */
2151                 missing_args = 2;
2152         if (refused_delete && (delete_mode || missing_args == 2)) {
2153                 create_refuse_error(refused_delete);
2154                 return 0;
2155         }
2156
2157         if (remove_source_files) {
2158                 /* We only want to infer this refusal of --remove-source-files
2159                  * via the refusal of "delete", not any of the "delete-FOO"
2160                  * options. */
2161                 if (refused_delete && am_sender) {
2162                         create_refuse_error(refused_delete);
2163                         return 0;
2164                 }
2165                 need_messages_from_generator = 1;
2166         }
2167
2168         if (munge_symlinks && !am_daemon) {
2169                 STRUCT_STAT st;
2170                 char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */
2171                 strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */
2172                 if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) {
2173                         rprintf(FERROR, "Symlink munging is unsafe when a %s directory exists.\n",
2174                                 prefix);
2175                         exit_cleanup(RERR_UNSUPPORTED);
2176                 }
2177         }
2178
2179         if (sanitize_paths) {
2180                 int i;
2181                 for (i = argc; i-- > 0; )
2182                         argv[i] = sanitize_path(NULL, argv[i], "", 0, SP_KEEP_DOT_DIRS);
2183                 if (tmpdir)
2184                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, SP_DEFAULT);
2185                 if (backup_dir)
2186                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, SP_DEFAULT);
2187         }
2188         if (daemon_filter_list.head && !am_sender) {
2189                 filter_rule_list *elp = &daemon_filter_list;
2190                 if (tmpdir) {
2191                         char *dir;
2192                         if (!*tmpdir)
2193                                 goto options_rejected;
2194                         dir = tmpdir + (*tmpdir == '/' ? module_dirlen : 0);
2195                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2196                         if (check_filter(elp, FLOG, dir, 1) < 0)
2197                                 goto options_rejected;
2198                 }
2199                 if (backup_dir) {
2200                         char *dir;
2201                         if (!*backup_dir)
2202                                 goto options_rejected;
2203                         dir = backup_dir + (*backup_dir == '/' ? module_dirlen : 0);
2204                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2205                         if (check_filter(elp, FLOG, dir, 1) < 0)
2206                                 goto options_rejected;
2207                 }
2208         }
2209
2210         if (!backup_suffix)
2211                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
2212         backup_suffix_len = strlen(backup_suffix);
2213         if (strchr(backup_suffix, '/') != NULL) {
2214                 snprintf(err_buf, sizeof err_buf,
2215                         "--suffix cannot contain slashes: %s\n",
2216                         backup_suffix);
2217                 return 0;
2218         }
2219         if (backup_dir) {
2220                 size_t len;
2221                 make_backups = 1; /* --backup-dir implies --backup */
2222                 while (*backup_dir == '.' && backup_dir[1] == '/')
2223                         backup_dir += 2;
2224                 if (*backup_dir == '.' && backup_dir[1] == '\0')
2225                         backup_dir++;
2226                 len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
2227                 if (len > sizeof backup_dir_buf - 128) {
2228                         snprintf(err_buf, sizeof err_buf,
2229                                 "the --backup-dir path is WAY too long.\n");
2230                         return 0;
2231                 }
2232                 backup_dir_len = (int)len;
2233                 if (!backup_dir_len) {
2234                         backup_dir_len = -1;
2235                         backup_dir = NULL;
2236                 } else if (backup_dir_buf[backup_dir_len - 1] != '/') {
2237                         backup_dir_buf[backup_dir_len++] = '/';
2238                         backup_dir_buf[backup_dir_len] = '\0';
2239                 }
2240                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
2241         }
2242         if (backup_dir) {
2243                 /* No need for a suffix or a protect rule. */
2244         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
2245                 snprintf(err_buf, sizeof err_buf,
2246                         "--suffix cannot be empty %s\n", backup_dir_len < 0
2247                         ? "when --backup-dir is the same as the dest dir"
2248                         : "without a --backup-dir");
2249                 return 0;
2250         } else if (make_backups && delete_mode && !delete_excluded && !am_server) {
2251                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
2252                         "P *%s", backup_suffix);
2253                 parse_filter_str(&filter_list, backup_dir_buf, rule_template(0), 0);
2254         }
2255
2256         if (preserve_times) {
2257                 preserve_times = PRESERVE_FILE_TIMES;
2258                 if (!omit_dir_times)
2259                         preserve_times |= PRESERVE_DIR_TIMES;
2260 #ifdef CAN_SET_SYMLINK_TIMES
2261                 if (!omit_link_times)
2262                         preserve_times |= PRESERVE_LINK_TIMES;
2263 #endif
2264         }
2265
2266         if (make_backups && !backup_dir) {
2267                 omit_dir_times = 0; /* Implied, so avoid -O to sender. */
2268                 preserve_times &= ~PRESERVE_DIR_TIMES;
2269         }
2270
2271         if (stdout_format) {
2272                 if (am_server && log_format_has(stdout_format, 'I'))
2273                         stdout_format_has_i = 2;
2274                 else if (log_format_has(stdout_format, 'i'))
2275                         stdout_format_has_i = itemize_changes | 1;
2276                 if (!log_format_has(stdout_format, 'b')
2277                  && !log_format_has(stdout_format, 'c')
2278                  && !log_format_has(stdout_format, 'C'))
2279                         log_before_transfer = !am_server;
2280         } else if (itemize_changes) {
2281                 stdout_format = "%i %n%L";
2282                 stdout_format_has_i = itemize_changes;
2283                 log_before_transfer = !am_server;
2284         }
2285
2286         if (do_progress && !am_server) {
2287                 if (!log_before_transfer && INFO_EQ(NAME, 0))
2288                         parse_output_words(info_words, info_levels, "name", DEFAULT_PRIORITY);
2289                 parse_output_words(info_words, info_levels, "flist2,progress", DEFAULT_PRIORITY);
2290         }
2291
2292         if (dry_run)
2293                 do_xfers = 0;
2294
2295         set_io_timeout(io_timeout);
2296
2297         if (INFO_GTE(NAME, 1) && !stdout_format) {
2298                 stdout_format = "%n%L";
2299                 log_before_transfer = !am_server;
2300         }
2301         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
2302                 stdout_format_has_o_or_i = 1;
2303
2304         if (logfile_name && !am_daemon) {
2305                 if (!logfile_format) {
2306                         logfile_format = "%i %n%L";
2307                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
2308                 } else {
2309                         if (log_format_has(logfile_format, 'i'))
2310                                 logfile_format_has_i = 1;
2311                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
2312                                 logfile_format_has_o_or_i = 1;
2313                 }
2314                 log_init(0);
2315         } else if (!am_daemon)
2316                 logfile_format = NULL;
2317
2318         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
2319                 bwlimit = daemon_bwlimit;
2320         if (bwlimit) {
2321                 bwlimit_writemax = (size_t)bwlimit * 128;
2322                 if (bwlimit_writemax < 512)
2323                         bwlimit_writemax = 512;
2324         }
2325
2326         if (append_mode) {
2327                 if (whole_file > 0) {
2328                         snprintf(err_buf, sizeof err_buf,
2329                                  "--append cannot be used with --whole-file\n");
2330                         return 0;
2331                 }
2332                 if (refused_inplace) {
2333                         create_refuse_error(refused_inplace);
2334                         return 0;
2335                 }
2336                 inplace = 1;
2337         }
2338
2339         if (write_devices) {
2340                 if (refused_inplace) {
2341                         create_refuse_error(refused_inplace);
2342                         return 0;
2343                 }
2344                 inplace = 1;
2345         }
2346
2347         if (delay_updates && !partial_dir)
2348                 partial_dir = tmp_partialdir;
2349
2350         if (inplace) {
2351 #ifdef HAVE_FTRUNCATE
2352                 if (partial_dir) {
2353                         snprintf(err_buf, sizeof err_buf,
2354                                  "--%s cannot be used with --%s\n",
2355                                  append_mode ? "append" : "inplace",
2356                                  delay_updates ? "delay-updates" : "partial-dir");
2357                         return 0;
2358                 }
2359                 /* --inplace implies --partial for refusal purposes, but we
2360                  * clear the keep_partial flag for internal logic purposes. */
2361                 if (refused_partial) {
2362                         create_refuse_error(refused_partial);
2363                         return 0;
2364                 }
2365                 keep_partial = 0;
2366 #else
2367                 snprintf(err_buf, sizeof err_buf,
2368                          "--%s is not supported on this %s\n",
2369                          append_mode ? "append" : "inplace",
2370                          am_server ? "server" : "client");
2371                 return 0;
2372 #endif
2373         } else {
2374                 if (keep_partial && !partial_dir && !am_server) {
2375                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
2376                                 partial_dir = strdup(arg);
2377                 }
2378                 if (partial_dir) {
2379                         if (*partial_dir)
2380                                 clean_fname(partial_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2381                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
2382                                 partial_dir = NULL;
2383                         if (!partial_dir && refused_partial) {
2384                                 create_refuse_error(refused_partial);
2385                                 return 0;
2386                         }
2387                         keep_partial = 1;
2388                 }
2389         }
2390
2391         if (files_from) {
2392                 char *h, *p;
2393                 int q;
2394                 if (argc > 2 || (!am_daemon && !am_server && argc == 1)) {
2395                         usage(FERROR);
2396                         exit_cleanup(RERR_SYNTAX);
2397                 }
2398                 if (strcmp(files_from, "-") == 0) {
2399                         filesfrom_fd = 0;
2400                         if (am_server)
2401                                 filesfrom_host = ""; /* reading from socket */
2402                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
2403                         if (am_server) {
2404                                 snprintf(err_buf, sizeof err_buf,
2405                                         "The --files-from sent to the server cannot specify a host.\n");
2406                                 return 0;
2407                         }
2408                         files_from = p;
2409                         filesfrom_host = h;
2410                         if (strcmp(files_from, "-") == 0) {
2411                                 snprintf(err_buf, sizeof err_buf,
2412                                         "Invalid --files-from remote filename\n");
2413                                 return 0;
2414                         }
2415                 } else {
2416                         if (sanitize_paths)
2417                                 files_from = sanitize_path(NULL, files_from, NULL, 0, SP_DEFAULT);
2418                         if (daemon_filter_list.head) {
2419                                 char *dir;
2420                                 if (!*files_from)
2421                                         goto options_rejected;
2422                                 dir = files_from + (*files_from == '/' ? module_dirlen : 0);
2423                                 clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2424                                 if (check_filter(&daemon_filter_list, FLOG, dir, 0) < 0)
2425                                         goto options_rejected;
2426                         }
2427                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
2428                         if (filesfrom_fd < 0) {
2429                                 snprintf(err_buf, sizeof err_buf,
2430                                         "failed to open files-from file %s: %s\n",
2431                                         files_from, strerror(errno));
2432                                 return 0;
2433                         }
2434                 }
2435         }
2436
2437         am_starting_up = 0;
2438
2439         return 1;
2440
2441   options_rejected:
2442         snprintf(err_buf, sizeof err_buf,
2443                 "Your options have been rejected by the server.\n");
2444         return 0;
2445 }
2446
2447
2448 /**
2449  * Construct a filtered list of options to pass through from the
2450  * client to the server.
2451  *
2452  * This involves setting options that will tell the server how to
2453  * behave, and also filtering out options that are processed only
2454  * locally.
2455  **/
2456 void server_options(char **args, int *argc_p)
2457 {
2458         static char argstr[64];
2459         int ac = *argc_p;
2460         uchar where;
2461         char *arg;
2462         int i, x;
2463
2464         /* This should always remain first on the server's command-line. */
2465         args[ac++] = "--server";
2466
2467         if (daemon_over_rsh > 0) {
2468                 args[ac++] = "--daemon";
2469                 *argc_p = ac;
2470                 /* if we're passing --daemon, we're done */
2471                 return;
2472         }
2473
2474         if (!am_sender)
2475                 args[ac++] = "--sender";
2476
2477         x = 1;
2478         argstr[0] = '-';
2479
2480         if (protect_args)
2481                 argstr[x++] = 's';
2482
2483         for (i = 0; i < verbose; i++)
2484                 argstr[x++] = 'v';
2485
2486         if (quiet && msgs2stderr)
2487                 argstr[x++] = 'q';
2488         if (make_backups)
2489                 argstr[x++] = 'b';
2490         if (update_only)
2491                 argstr[x++] = 'u';
2492         if (!do_xfers) /* Note: NOT "dry_run"! */
2493                 argstr[x++] = 'n';
2494         if (preserve_links)
2495                 argstr[x++] = 'l';
2496         if ((xfer_dirs >= 2 && xfer_dirs < 4)
2497          || (xfer_dirs && !recurse && (list_only || (delete_mode && am_sender))))
2498                 argstr[x++] = 'd';
2499         if (am_sender) {
2500                 if (keep_dirlinks)
2501                         argstr[x++] = 'K';
2502                 if (prune_empty_dirs)
2503                         argstr[x++] = 'm';
2504                 if (omit_dir_times)
2505                         argstr[x++] = 'O';
2506                 if (omit_link_times)
2507                         argstr[x++] = 'J';
2508                 if (fuzzy_basis) {
2509                         argstr[x++] = 'y';
2510                         if (fuzzy_basis > 1)
2511                                 argstr[x++] = 'y';
2512                 }
2513         } else {
2514                 if (copy_links)
2515                         argstr[x++] = 'L';
2516                 if (copy_dirlinks)
2517                         argstr[x++] = 'k';
2518         }
2519
2520         if (whole_file > 0)
2521                 argstr[x++] = 'W';
2522         /* We don't need to send --no-whole-file, because it's the
2523          * default for remote transfers, and in any case old versions
2524          * of rsync will not understand it. */
2525
2526         if (preserve_hard_links) {
2527                 argstr[x++] = 'H';
2528                 if (preserve_hard_links > 1)
2529                         argstr[x++] = 'H';
2530         }
2531         if (preserve_uid)
2532                 argstr[x++] = 'o';
2533         if (preserve_gid)
2534                 argstr[x++] = 'g';
2535         if (preserve_devices) /* ignore preserve_specials here */
2536                 argstr[x++] = 'D';
2537         if (preserve_times)
2538                 argstr[x++] = 't';
2539         if (preserve_atimes) {
2540                 argstr[x++] = 'U';
2541                 if (preserve_atimes > 1)
2542                         argstr[x++] = 'U';
2543         }
2544         if (preserve_perms)
2545                 argstr[x++] = 'p';
2546         else if (preserve_executability && am_sender)
2547                 argstr[x++] = 'E';
2548 #ifdef SUPPORT_ACLS
2549         if (preserve_acls)
2550                 argstr[x++] = 'A';
2551 #endif
2552 #ifdef SUPPORT_XATTRS
2553         if (preserve_xattrs) {
2554                 argstr[x++] = 'X';
2555                 if (preserve_xattrs > 1)
2556                         argstr[x++] = 'X';
2557         }
2558 #endif
2559         if (recurse)
2560                 argstr[x++] = 'r';
2561         if (always_checksum)
2562                 argstr[x++] = 'c';
2563         if (cvs_exclude)
2564                 argstr[x++] = 'C';
2565         if (ignore_times)
2566                 argstr[x++] = 'I';
2567         if (relative_paths)
2568                 argstr[x++] = 'R';
2569         if (one_file_system) {
2570                 argstr[x++] = 'x';
2571                 if (one_file_system > 1)
2572                         argstr[x++] = 'x';
2573         }
2574         if (sparse_files)
2575                 argstr[x++] = 'S';
2576         if (do_compression == CPRES_ZLIB)
2577                 argstr[x++] = 'z';
2578
2579         set_allow_inc_recurse();
2580
2581         /* We don't really know the actual protocol_version at this point,
2582          * but checking the pre-negotiated value allows the user to use a
2583          * --protocol=29 override to avoid the use of this -eFLAGS opt. */
2584         if (protocol_version >= 30) {
2585                 /* Use "eFlags" alias so that cull_options doesn't think that these are no-arg option letters. */
2586 #define eFlags argstr
2587                 /* We make use of the -e option to let the server know about
2588                  * any pre-release protocol version && some behavior flags. */
2589                 eFlags[x++] = 'e';
2590 #if SUBPROTOCOL_VERSION != 0
2591                 if (protocol_version == PROTOCOL_VERSION) {
2592                         x += snprintf(argstr+x, sizeof argstr - x,
2593                                       "%d.%d",
2594                                       PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
2595                 } else
2596 #endif
2597                         eFlags[x++] = '.';
2598                 if (allow_inc_recurse)
2599                         eFlags[x++] = 'i';
2600 #ifdef CAN_SET_SYMLINK_TIMES
2601                 eFlags[x++] = 'L'; /* symlink time-setting support */
2602 #endif
2603 #ifdef ICONV_OPTION
2604                 eFlags[x++] = 's'; /* symlink iconv translation support */
2605 #endif
2606                 eFlags[x++] = 'f'; /* flist I/O-error safety support */
2607                 eFlags[x++] = 'x'; /* xattr hardlink optimization not desired */
2608                 eFlags[x++] = 'C'; /* support checksum seed order fix */
2609                 eFlags[x++] = 'I'; /* support inplace_partial behavior */
2610                 eFlags[x++] = 'v'; /* use varint for flist & compat flags; negotiate checksum */
2611                 /* NOTE: Avoid using 'V' -- it was the high bit of a write_byte() that became write_varint(). */
2612 #undef eFlags
2613         }
2614
2615         if (x >= (int)sizeof argstr) { /* Not possible... */
2616                 rprintf(FERROR, "argstr overflow in server_options().\n");
2617                 exit_cleanup(RERR_MALLOC);
2618         }
2619
2620         argstr[x] = '\0';
2621
2622         if (x > 1)
2623                 args[ac++] = argstr;
2624
2625 #ifdef ICONV_OPTION
2626         if (iconv_opt) {
2627                 char *set = strchr(iconv_opt, ',');
2628                 if (set)
2629                         set++;
2630                 else
2631                         set = iconv_opt;
2632                 if (asprintf(&arg, "--iconv=%s", set) < 0)
2633                         goto oom;
2634                 args[ac++] = arg;
2635         }
2636 #endif
2637
2638         if (protect_args && !local_server) /* unprotected args stop here */
2639                 args[ac++] = NULL;
2640
2641         if (list_only > 1)
2642                 args[ac++] = "--list-only";
2643
2644         /* This makes sure that the remote rsync can handle deleting with -d
2645          * sans -r because the --no-r option was added at the same time. */
2646         if (xfer_dirs && !recurse && delete_mode && am_sender)
2647                 args[ac++] = "--no-r";
2648
2649         if (do_compression && do_compression_level != CLVL_NOT_SPECIFIED) {
2650                 if (asprintf(&arg, "--compress-level=%d", do_compression_level) < 0)
2651                         goto oom;
2652                 args[ac++] = arg;
2653         }
2654
2655         if (preserve_devices) {
2656                 /* Note: sending "--devices" would not be backward-compatible. */
2657                 if (!preserve_specials)
2658                         args[ac++] = "--no-specials"; /* -D is already set. */
2659         } else if (preserve_specials)
2660                 args[ac++] = "--specials";
2661
2662         /* The server side doesn't use our log-format, but in certain
2663          * circumstances they need to know a little about the option. */
2664         if (stdout_format && am_sender) {
2665                 /* Use --log-format, not --out-format, for compatibility. */
2666                 if (stdout_format_has_i > 1)
2667                         args[ac++] = "--log-format=%i%I";
2668                 else if (stdout_format_has_i)
2669                         args[ac++] = "--log-format=%i";
2670                 else if (stdout_format_has_o_or_i)
2671                         args[ac++] = "--log-format=%o";
2672                 else if (!verbose)
2673                         args[ac++] = "--log-format=X";
2674         }
2675
2676         if (block_size) {
2677                 if (asprintf(&arg, "-B%lu", block_size) < 0)
2678                         goto oom;
2679                 args[ac++] = arg;
2680         }
2681
2682         if (io_timeout) {
2683                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
2684                         goto oom;
2685                 args[ac++] = arg;
2686         }
2687
2688         if (bwlimit) {
2689                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
2690                         goto oom;
2691                 args[ac++] = arg;
2692         }
2693
2694         if (backup_dir) {
2695                 args[ac++] = "--backup-dir";
2696                 args[ac++] = backup_dir;
2697         }
2698
2699         /* Only send --suffix if it specifies a non-default value. */
2700         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
2701                 /* We use the following syntax to avoid weirdness with '~'. */
2702                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
2703                         goto oom;
2704                 args[ac++] = arg;
2705         }
2706
2707         if (checksum_choice) {
2708                 if (asprintf(&arg, "--checksum-choice=%s", checksum_choice) < 0)
2709                         goto oom;
2710                 args[ac++] = arg;
2711         }
2712
2713         if (do_compression == CPRES_ZLIBX)
2714                 args[ac++] = "--new-compress";
2715         else if (compress_choice && do_compression == CPRES_ZLIB)
2716                 args[ac++] = "--old-compress";
2717         else if (compress_choice) {
2718                 if (asprintf(&arg, "--compress-choice=%s", compress_choice) < 0)
2719                         goto oom;
2720                 args[ac++] = arg;
2721         }
2722
2723         if (am_sender) {
2724                 if (max_delete > 0) {
2725                         if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
2726                                 goto oom;
2727                         args[ac++] = arg;
2728                 } else if (max_delete == 0)
2729                         args[ac++] = "--max-delete=-1";
2730                 if (min_size >= 0) {
2731                         args[ac++] = "--min-size";
2732                         args[ac++] = min_size_arg;
2733                 }
2734                 if (max_size >= 0) {
2735                         args[ac++] = "--max-size";
2736                         args[ac++] = max_size_arg;
2737                 }
2738                 if (delete_before)
2739                         args[ac++] = "--delete-before";
2740                 else if (delete_during == 2)
2741                         args[ac++] = "--delete-delay";
2742                 else if (delete_during)
2743                         args[ac++] = "--delete-during";
2744                 else if (delete_after)
2745                         args[ac++] = "--delete-after";
2746                 else if (delete_mode && !delete_excluded)
2747                         args[ac++] = "--delete";
2748                 if (delete_excluded)
2749                         args[ac++] = "--delete-excluded";
2750                 if (force_delete)
2751                         args[ac++] = "--force";
2752                 if (write_batch < 0)
2753                         args[ac++] = "--only-write-batch=X";
2754                 if (am_root > 1)
2755                         args[ac++] = "--super";
2756                 if (size_only)
2757                         args[ac++] = "--size-only";
2758                 if (do_stats)
2759                         args[ac++] = "--stats";
2760         } else {
2761                 if (skip_compress) {
2762                         if (asprintf(&arg, "--skip-compress=%s", skip_compress) < 0)
2763                                 goto oom;
2764                         args[ac++] = arg;
2765                 }
2766         }
2767
2768         if (max_alloc_arg && max_alloc != DEFAULT_MAX_ALLOC) {
2769                 args[ac++] = "--max-alloc";
2770                 args[ac++] = max_alloc_arg;
2771         }
2772
2773         /* --delete-missing-args needs the cooperation of both sides, but
2774          * the sender can handle --ignore-missing-args by itself. */
2775         if (missing_args == 2)
2776                 args[ac++] = "--delete-missing-args";
2777         else if (missing_args == 1 && !am_sender)
2778                 args[ac++] = "--ignore-missing-args";
2779
2780         if (modify_window_set && am_sender) {
2781                 char *fmt = modify_window < 0 ? "-@%d" : "--modify-window=%d";
2782                 if (asprintf(&arg, fmt, modify_window) < 0)
2783                         goto oom;
2784                 args[ac++] = arg;
2785         }
2786
2787         if (checksum_seed) {
2788                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
2789                         goto oom;
2790                 args[ac++] = arg;
2791         }
2792
2793         if (partial_dir && am_sender) {
2794                 if (partial_dir != tmp_partialdir) {
2795                         args[ac++] = "--partial-dir";
2796                         args[ac++] = partial_dir;
2797                 }
2798                 if (delay_updates)
2799                         args[ac++] = "--delay-updates";
2800         } else if (keep_partial && am_sender)
2801                 args[ac++] = "--partial";
2802
2803         if (ignore_errors)
2804                 args[ac++] = "--ignore-errors";
2805
2806         if (copy_unsafe_links)
2807                 args[ac++] = "--copy-unsafe-links";
2808
2809         if (safe_symlinks)
2810                 args[ac++] = "--safe-links";
2811
2812         if (numeric_ids)
2813                 args[ac++] = "--numeric-ids";
2814
2815         if (use_qsort)
2816                 args[ac++] = "--use-qsort";
2817
2818         if (am_sender) {
2819                 if (usermap) {
2820                         if (asprintf(&arg, "--usermap=%s", usermap) < 0)
2821                                 goto oom;
2822                         args[ac++] = arg;
2823                 }
2824
2825                 if (groupmap) {
2826                         if (asprintf(&arg, "--groupmap=%s", groupmap) < 0)
2827                                 goto oom;
2828                         args[ac++] = arg;
2829                 }
2830
2831                 if (ignore_existing)
2832                         args[ac++] = "--ignore-existing";
2833
2834                 /* Backward compatibility: send --existing, not --ignore-non-existing. */
2835                 if (ignore_non_existing)
2836                         args[ac++] = "--existing";
2837
2838                 if (tmpdir) {
2839                         args[ac++] = "--temp-dir";
2840                         args[ac++] = tmpdir;
2841                 }
2842
2843                 if (basis_dir[0]) {
2844                         /* the server only needs this option if it is not the sender,
2845                          *   and it may be an older version that doesn't know this
2846                          *   option, so don't send it if client is the sender.
2847                          */
2848                         for (i = 0; i < basis_dir_cnt; i++) {
2849                                 args[ac++] = alt_dest_opt(0);
2850                                 args[ac++] = basis_dir[i];
2851                         }
2852                 }
2853         }
2854
2855         /* What flags do we need to send to the other side? */
2856         where = (am_server ? W_CLI : W_SRV) | (am_sender ? W_REC : W_SND);
2857         arg = make_output_option(info_words, info_levels, where);
2858         if (arg)
2859                 args[ac++] = arg;
2860
2861         if (append_mode) {
2862                 if (append_mode > 1)
2863                         args[ac++] = "--append";
2864                 args[ac++] = "--append";
2865         } else if (inplace)
2866                 args[ac++] = "--inplace";
2867
2868         if (files_from && (!am_sender || filesfrom_host)) {
2869                 if (filesfrom_host) {
2870                         args[ac++] = "--files-from";
2871                         args[ac++] = files_from;
2872                         if (eol_nulls)
2873                                 args[ac++] = "--from0";
2874                 } else {
2875                         args[ac++] = "--files-from=-";
2876                         args[ac++] = "--from0";
2877                 }
2878                 if (!relative_paths)
2879                         args[ac++] = "--no-relative";
2880         }
2881         /* It's OK that this checks the upper-bound of the protocol_version. */
2882         if (relative_paths && !implied_dirs && (!am_sender || protocol_version >= 30))
2883                 args[ac++] = "--no-implied-dirs";
2884
2885         if (write_devices && am_sender)
2886                 args[ac++] = "--write-devices";
2887
2888         if (remove_source_files == 1)
2889                 args[ac++] = "--remove-source-files";
2890         else if (remove_source_files)
2891                 args[ac++] = "--remove-sent-files";
2892
2893         if (preallocate_files && am_sender)
2894                 args[ac++] = "--preallocate";
2895
2896         if (open_noatime && preserve_atimes <= 1)
2897                 args[ac++] = "--open-noatime";
2898
2899         if (ac > MAX_SERVER_ARGS) { /* Not possible... */
2900                 rprintf(FERROR, "argc overflow in server_options().\n");
2901                 exit_cleanup(RERR_MALLOC);
2902         }
2903
2904         if (remote_option_cnt) {
2905                 int j;
2906                 if (ac + remote_option_cnt > MAX_SERVER_ARGS) {
2907                         rprintf(FERROR, "too many remote options specified.\n");
2908                         exit_cleanup(RERR_SYNTAX);
2909                 }
2910                 for (j = 1; j <= remote_option_cnt; j++)
2911                         args[ac++] = (char*)remote_options[j];
2912         }
2913
2914         *argc_p = ac;
2915         return;
2916
2917     oom:
2918         out_of_memory("server_options");
2919 }
2920
2921 /* If str points to a valid hostspec, return allocated memory containing the
2922  * [USER@]HOST part of the string, and set the path_start_ptr to the part of
2923  * the string after the host part.  Otherwise, return NULL.  If port_ptr is
2924  * non-NULL, we must be parsing an rsync:// URL hostname, and we will set
2925  * *port_ptr if a port number is found.  Note that IPv6 IPs will have their
2926  * (required for parsing) [ and ] chars elided from the returned string. */
2927 static char *parse_hostspec(char *str, char **path_start_ptr, int *port_ptr)
2928 {
2929         char *s, *host_start = str;
2930         int hostlen = 0, userlen = 0;
2931         char *ret;
2932
2933         for (s = str; ; s++) {
2934                 if (!*s) {
2935                         /* It is only OK if we run out of string with rsync:// */
2936                         if (!port_ptr)
2937                                 return NULL;
2938                         if (!hostlen)
2939                                 hostlen = s - host_start;
2940                         break;
2941                 }
2942                 if (*s == ':' || *s == '/') {
2943                         if (!hostlen)
2944                                 hostlen = s - host_start;
2945                         if (*s++ == '/') {
2946                                 if (!port_ptr)
2947                                         return NULL;
2948                         } else if (port_ptr) {
2949                                 *port_ptr = atoi(s);
2950                                 while (isDigit(s)) s++;
2951                                 if (*s && *s++ != '/')
2952                                         return NULL;
2953                         }
2954                         break;
2955                 }
2956                 if (*s == '@') {
2957                         userlen = s - str + 1;
2958                         host_start = s + 1;
2959                 } else if (*s == '[') {
2960                         if (s != host_start++)
2961                                 return NULL;
2962                         while (*s && *s != ']' && *s != '/') s++; /*SHARED ITERATOR*/
2963                         hostlen = s - host_start;
2964                         if (*s != ']' || (s[1] && s[1] != '/' && s[1] != ':') || !hostlen)
2965                                 return NULL;
2966                 }
2967         }
2968
2969         *path_start_ptr = s;
2970         ret = new_array(char, userlen + hostlen + 1);
2971         if (userlen)
2972                 strlcpy(ret, str, userlen + 1);
2973         strlcpy(ret + userlen, host_start, hostlen + 1);
2974         return ret;
2975 }
2976
2977 /* Look for a HOST specification of the form "HOST:PATH", "HOST::PATH", or
2978  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
2979  * memory with the HOST.  If a daemon-accessing spec was specified, the value
2980  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
2981  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
2982  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
2983  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
2984 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
2985 {
2986         char *path;
2987
2988         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
2989                 *host_ptr = parse_hostspec(s + strlen(URL_PREFIX), &path, port_ptr);
2990                 if (*host_ptr) {
2991                         if (!*port_ptr)
2992                                 *port_ptr = -1; /* -1 indicates they want the default */
2993                         return path;
2994                 }
2995         }
2996
2997         *host_ptr = parse_hostspec(s, &path, NULL);
2998         if (!*host_ptr)
2999                 return NULL;
3000
3001         if (*path == ':') {
3002                 if (port_ptr && !*port_ptr)
3003                         *port_ptr = -1;
3004                 return path + 1;
3005         }
3006         if (port_ptr)
3007                 *port_ptr = 0;
3008
3009         return path;
3010 }