Add compatibility with an unmodified zlib.
[rsync.git] / 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) 2002-2011 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 <popt.h>
25 #include <zlib.h>
26
27 extern int module_id;
28 extern int local_server;
29 extern int sanitize_paths;
30 extern int daemon_over_rsh;
31 extern unsigned int module_dirlen;
32 extern filter_rule_list filter_list;
33 extern filter_rule_list daemon_filter_list;
34
35 int make_backups = 0;
36
37 /**
38  * If 1, send the whole file as literal data rather than trying to
39  * create an incremental diff.
40  *
41  * If -1, then look at whether we're local or remote and go by that.
42  *
43  * @sa disable_deltas_p()
44  **/
45 int whole_file = -1;
46
47 int append_mode = 0;
48 int keep_dirlinks = 0;
49 int copy_dirlinks = 0;
50 int copy_links = 0;
51 int preserve_links = 0;
52 int preserve_hard_links = 0;
53 int preserve_acls = 0;
54 int preserve_xattrs = 0;
55 int preserve_perms = 0;
56 int preserve_executability = 0;
57 int preserve_devices = 0;
58 int preserve_specials = 0;
59 int preserve_uid = 0;
60 int preserve_gid = 0;
61 int preserve_times = 0;
62 int update_only = 0;
63 int cvs_exclude = 0;
64 int dry_run = 0;
65 int do_xfers = 1;
66 int ignore_times = 0;
67 int delete_mode = 0;
68 int delete_during = 0;
69 int delete_before = 0;
70 int delete_after = 0;
71 int delete_excluded = 0;
72 int remove_source_files = 0;
73 int one_file_system = 0;
74 int protocol_version = PROTOCOL_VERSION;
75 int sparse_files = 0;
76 int preallocate_files = 0;
77 int do_compression = 0;
78 int def_compress_level = Z_DEFAULT_COMPRESSION;
79 int am_root = 0; /* 0 = normal, 1 = root, 2 = --super, -1 = --fake-super */
80 int am_server = 0;
81 int am_sender = 0;
82 int am_starting_up = 1;
83 int relative_paths = -1;
84 int implied_dirs = 1;
85 int missing_args = 0; /* 0 = FERROR_XFER, 1 = ignore, 2 = delete */
86 int numeric_ids = 0;
87 int msgs2stderr = 0;
88 int allow_8bit_chars = 0;
89 int force_delete = 0;
90 int io_timeout = 0;
91 int prune_empty_dirs = 0;
92 int use_qsort = 0;
93 char *files_from = NULL;
94 int filesfrom_fd = -1;
95 char *filesfrom_host = NULL;
96 int eol_nulls = 0;
97 int protect_args = -1;
98 int human_readable = 1;
99 int recurse = 0;
100 int allow_inc_recurse = 1;
101 int xfer_dirs = -1;
102 int am_daemon = 0;
103 int connect_timeout = 0;
104 int keep_partial = 0;
105 int safe_symlinks = 0;
106 int copy_unsafe_links = 0;
107 int munge_symlinks = 0;
108 int size_only = 0;
109 int daemon_bwlimit = 0;
110 int bwlimit = 0;
111 int fuzzy_basis = 0;
112 size_t bwlimit_writemax = 0;
113 int ignore_existing = 0;
114 int ignore_non_existing = 0;
115 int need_messages_from_generator = 0;
116 int max_delete = INT_MIN;
117 OFF_T max_size = 0;
118 OFF_T min_size = 0;
119 int ignore_errors = 0;
120 int modify_window = 0;
121 int blocking_io = -1;
122 int checksum_seed = 0;
123 int inplace = 0;
124 int delay_updates = 0;
125 long block_size = 0; /* "long" because popt can't set an int32. */
126 char number_separator;
127 char *skip_compress = NULL;
128 item_list dparam_list = EMPTY_ITEM_LIST;
129
130 /** Network address family. **/
131 int default_af_hint
132 #ifdef INET6
133         = 0;            /* Any protocol */
134 #else
135         = AF_INET;      /* Must use IPv4 */
136 # ifdef AF_INET6
137 #  undef AF_INET6
138 # endif
139 # define AF_INET6 AF_INET /* make -6 option a no-op */
140 #endif
141
142 /** Do not go into the background when run as --daemon.  Good
143  * for debugging and required for running as a service on W32,
144  * or under Unix process-monitors. **/
145 int no_detach
146 #if defined _WIN32 || defined __WIN32__
147         = 1;
148 #else
149         = 0;
150 #endif
151
152 int write_batch = 0;
153 int read_batch = 0;
154 int backup_dir_len = 0;
155 int backup_suffix_len;
156 unsigned int backup_dir_remainder;
157
158 char *backup_suffix = NULL;
159 char *tmpdir = NULL;
160 char *partial_dir = NULL;
161 char *basis_dir[MAX_BASIS_DIRS+1];
162 char *config_file = NULL;
163 char *shell_cmd = NULL;
164 char *logfile_name = NULL;
165 char *logfile_format = NULL;
166 char *stdout_format = NULL;
167 char *password_file = NULL;
168 char *rsync_path = RSYNC_PATH;
169 char *backup_dir = NULL;
170 char backup_dir_buf[MAXPATHLEN];
171 char *sockopts = NULL;
172 char *usermap = NULL;
173 char *groupmap = NULL;
174 int rsync_port = 0;
175 int compare_dest = 0;
176 int copy_dest = 0;
177 int link_dest = 0;
178 int basis_dir_cnt = 0;
179 char *dest_option = NULL;
180
181 static int remote_option_alloc = 0;
182 int remote_option_cnt = 0;
183 const char **remote_options = NULL;
184
185 int quiet = 0;
186 int output_motd = 1;
187 int log_before_transfer = 0;
188 int stdout_format_has_i = 0;
189 int stdout_format_has_o_or_i = 0;
190 int logfile_format_has_i = 0;
191 int logfile_format_has_o_or_i = 0;
192 int always_checksum = 0;
193 int list_only = 0;
194
195 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
196 char *batch_name = NULL;
197
198 int need_unsorted_flist = 0;
199 #ifdef ICONV_OPTION
200 char *iconv_opt = ICONV_OPTION;
201 #endif
202
203 struct chmod_mode_struct *chmod_modes = NULL;
204
205 static const char *debug_verbosity[] = {
206         /*0*/ NULL,
207         /*1*/ NULL,
208         /*2*/ "BIND,CMD,CONNECT,DEL,DELTASUM,DUP,FILTER,FLIST,ICONV",
209         /*3*/ "ACL,BACKUP,CONNECT2,DELTASUM2,DEL2,EXIT,FILTER2,FLIST2,FUZZY,GENR,OWN,RECV,SEND,TIME",
210         /*4*/ "CMD2,DELTASUM3,DEL3,EXIT2,FLIST3,ICONV2,OWN2,PROTO,TIME2",
211         /*5*/ "CHDIR,DELTASUM4,FLIST4,FUZZY2,HASH,HLINK",
212 };
213
214 #define MAX_VERBOSITY ((int)(sizeof debug_verbosity / sizeof debug_verbosity[0]) - 1)
215
216 static const char *info_verbosity[1+MAX_VERBOSITY] = {
217         /*0*/ NULL,
218         /*1*/ "COPY,DEL,FLIST,MISC,NAME,STATS,SYMSAFE",
219         /*2*/ "BACKUP,MISC2,MOUNT,NAME2,REMOVE,SKIP",
220 };
221
222 #define MAX_OUT_LEVEL 4 /* The largest N allowed for any flagN word. */
223
224 short info_levels[COUNT_INFO], debug_levels[COUNT_DEBUG];
225
226 #define DEFAULT_PRIORITY 0      /* Default/implied/--verbose set values. */
227 #define HELP_PRIORITY 1         /* The help output uses this level. */
228 #define USER_PRIORITY 2         /* User-specified via --info or --debug */
229 #define LIMIT_PRIORITY 3        /* Overriding priority when limiting values. */
230
231 #define W_CLI (1<<0)    /* client side */
232 #define W_SRV (1<<1)    /* server side */
233 #define W_SND (1<<2)    /* sending side */
234 #define W_REC (1<<3)    /* receiving side */
235
236 struct output_struct {
237         char *name;     /* The name of the info/debug flag. */
238         char *help;     /* The description of the info/debug flag. */
239         uchar namelen;  /* The length of the name string. */
240         uchar flag;     /* The flag's value, for consistency check. */
241         uchar where;    /* Bits indicating where the flag is used. */
242         uchar priority; /* See *_PRIORITY defines. */
243 };
244
245 #define INFO_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, INFO_##flag, where, 0 }
246
247 static struct output_struct info_words[COUNT_INFO+1] = {
248         INFO_WORD(BACKUP, W_REC, "Mention files backed up"),
249         INFO_WORD(COPY, W_REC, "Mention files copied locally on the receiving side"),
250         INFO_WORD(DEL, W_REC, "Mention deletions on the receiving side"),
251         INFO_WORD(FLIST, W_CLI, "Mention file-list receiving/sending (levels 1-2)"),
252         INFO_WORD(MISC, W_SND|W_REC, "Mention miscellaneous information (levels 1-2)"),
253         INFO_WORD(MOUNT, W_SND|W_REC, "Mention mounts that were found or skipped"),
254         INFO_WORD(NAME, W_SND|W_REC, "Mention 1) updated file/dir names, 2) unchanged names"),
255         INFO_WORD(PROGRESS, W_CLI, "Mention 1) per-file progress or 2) total transfer progress"),
256         INFO_WORD(REMOVE, W_SND, "Mention files removed on the sending side"),
257         INFO_WORD(SKIP, W_REC, "Mention files that are skipped due to options used"),
258         INFO_WORD(STATS, W_CLI|W_SRV, "Mention statistics at end of run (levels 1-3)"),
259         INFO_WORD(SYMSAFE, W_SND|W_REC, "Mention symlinks that are unsafe"),
260         { NULL, "--info", 0, 0, 0, 0 }
261 };
262
263 #define DEBUG_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, DEBUG_##flag, where, 0 }
264
265 static struct output_struct debug_words[COUNT_DEBUG+1] = {
266         DEBUG_WORD(ACL, W_SND|W_REC, "Debug extra ACL info"),
267         DEBUG_WORD(BACKUP, W_REC, "Debug backup actions (levels 1-2)"),
268         DEBUG_WORD(BIND, W_CLI, "Debug socket bind actions"),
269         DEBUG_WORD(CHDIR, W_CLI|W_SRV, "Debug when the current directory changes"),
270         DEBUG_WORD(CONNECT, W_CLI, "Debug connection events (levels 1-2)"),
271         DEBUG_WORD(CMD, W_CLI, "Debug commands+options that are issued (levels 1-2)"),
272         DEBUG_WORD(DEL, W_REC, "Debug delete actions (levels 1-3)"),
273         DEBUG_WORD(DELTASUM, W_SND|W_REC, "Debug delta-transfer checksumming (levels 1-4)"),
274         DEBUG_WORD(DUP, W_REC, "Debug weeding of duplicate names"),
275         DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-3)"),
276         DEBUG_WORD(FILTER, W_SND|W_REC, "Debug filter actions (levels 1-2)"),
277         DEBUG_WORD(FLIST, W_SND|W_REC, "Debug file-list operations (levels 1-4)"),
278         DEBUG_WORD(FUZZY, W_REC, "Debug fuzzy scoring (levels 1-2)"),
279         DEBUG_WORD(GENR, W_REC, "Debug generator functions"),
280         DEBUG_WORD(HASH, W_SND|W_REC, "Debug hashtable code"),
281         DEBUG_WORD(HLINK, W_SND|W_REC, "Debug hard-link actions (levels 1-3)"),
282         DEBUG_WORD(ICONV, W_CLI|W_SRV, "Debug iconv character conversions (levels 1-2)"),
283         DEBUG_WORD(IO, W_CLI|W_SRV, "Debug I/O routines (levels 1-4)"),
284         DEBUG_WORD(OWN, W_REC, "Debug ownership changes in users & groups (levels 1-2)"),
285         DEBUG_WORD(PROTO, W_CLI|W_SRV, "Debug protocol information"),
286         DEBUG_WORD(RECV, W_REC, "Debug receiver functions"),
287         DEBUG_WORD(SEND, W_SND, "Debug sender functions"),
288         DEBUG_WORD(TIME, W_REC, "Debug setting of modified times (levels 1-2)"),
289         { NULL, "--debug", 0, 0, 0, 0 }
290 };
291
292 static int verbose = 0;
293 static int do_stats = 0;
294 static int do_progress = 0;
295 static int daemon_opt;   /* sets am_daemon after option error-reporting */
296 static int omit_dir_times = 0;
297 static int omit_link_times = 0;
298 static int F_option_cnt = 0;
299 static int modify_window_set;
300 static int itemize_changes = 0;
301 static int refused_delete, refused_archive_part, refused_compress;
302 static int refused_partial, refused_progress, refused_delete_before;
303 static int refused_delete_during;
304 static int refused_inplace, refused_no_iconv;
305 static BOOL usermap_via_chown, groupmap_via_chown;
306 static char *bwlimit_arg, *max_size_arg, *min_size_arg;
307 static char tmp_partialdir[] = ".~tmp~";
308
309 /** Local address to bind.  As a character string because it's
310  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
311  * address, or a hostname. **/
312 char *bind_address;
313
314 static void output_item_help(struct output_struct *words);
315
316 /* This constructs a string that represents all the options set for either
317  * the --info or --debug setting, skipping any implied options (by -v, etc.).
318  * This is used both when conveying the user's options to the server, and
319  * when the help output wants to tell the user what options are implied. */
320 static char *make_output_option(struct output_struct *words, short *levels, uchar where)
321 {
322         char *str = words == info_words ? "--info=" : "--debug=";
323         int j, counts[MAX_OUT_LEVEL+1], pos, skipped = 0, len = 0, max = 0, lev = 0;
324         int word_count = words == info_words ? COUNT_INFO : COUNT_DEBUG;
325         char *buf;
326
327         memset(counts, 0, sizeof counts);
328
329         for (j = 0; words[j].name; j++) {
330                 if (words[j].flag != j) {
331                         rprintf(FERROR, "rsync: internal error on %s%s: %d != %d\n",
332                                 words == info_words ? "INFO_" : "DEBUG_",
333                                 words[j].name, words[j].flag, j);
334                         exit_cleanup(RERR_UNSUPPORTED);
335                 }
336                 if (!(words[j].where & where))
337                         continue;
338                 if (words[j].priority == DEFAULT_PRIORITY) {
339                         /* Implied items don't need to be mentioned. */
340                         skipped++;
341                         continue;
342                 }
343                 len += len ? 1 : strlen(str);
344                 len += strlen(words[j].name);
345                 len += levels[j] == 1 ? 0 : 1;
346
347                 if (words[j].priority == HELP_PRIORITY)
348                         continue; /* no abbreviating for help */
349
350                 assert(levels[j] <= MAX_OUT_LEVEL);
351                 if (++counts[levels[j]] > max) {
352                         /* Determine which level has the most items. */
353                         lev = levels[j];
354                         max = counts[lev];
355                 }
356         }
357
358         /* Sanity check the COUNT_* define against the length of the table. */
359         if (j != word_count) {
360                 rprintf(FERROR, "rsync: internal error: %s is wrong! (%d != %d)\n",
361                         words == info_words ? "COUNT_INFO" : "COUNT_DEBUG",
362                         j, word_count);
363                 exit_cleanup(RERR_UNSUPPORTED);
364         }
365
366         if (!len)
367                 return NULL;
368
369         len++;
370         if (!(buf = new_array(char, len)))
371                 out_of_memory("make_output_option");
372         pos = 0;
373
374         if (skipped || max < 5)
375                 lev = -1;
376         else {
377                 if (lev == 0)
378                         pos += snprintf(buf, len, "%sNONE", str);
379                 else if (lev == 1)
380                         pos += snprintf(buf, len, "%sALL", str);
381                 else
382                         pos += snprintf(buf, len, "%sALL%d", str, lev);
383         }
384
385         for (j = 0; words[j].name && pos < len; j++) {
386                 if (words[j].priority == DEFAULT_PRIORITY || levels[j] == lev || !(words[j].where & where))
387                         continue;
388                 if (pos)
389                         buf[pos++] = ',';
390                 else
391                         pos += strlcpy(buf+pos, str, len-pos);
392                 if (pos < len)
393                         pos += strlcpy(buf+pos, words[j].name, len-pos);
394                 /* Level 1 is implied by the name alone. */
395                 if (levels[j] != 1 && pos < len)
396                         buf[pos++] = '0' + levels[j];
397         }
398
399         buf[pos] = '\0';
400
401         return buf;
402 }
403
404 static void parse_output_words(struct output_struct *words, short *levels,
405                                const char *str, uchar priority)
406 {
407         const char *s;
408         int j, len, lev;
409
410         if (!str)
411                 return;
412
413         while (*str) {
414                 if ((s = strchr(str, ',')) != NULL)
415                         len = s++ - str;
416                 else
417                         len = strlen(str);
418                 while (len && isDigit(str+len-1))
419                         len--;
420                 lev = isDigit(str+len) ? atoi(str+len) : 1;
421                 if (lev > MAX_OUT_LEVEL)
422                         lev = MAX_OUT_LEVEL;
423                 if (len == 4 && strncasecmp(str, "help", 4) == 0) {
424                         output_item_help(words);
425                         exit_cleanup(0);
426                 }
427                 if (len == 4 && strncasecmp(str, "none", 4) == 0)
428                         len = lev = 0;
429                 else if (len == 3 && strncasecmp(str, "all", 3) == 0)
430                         len = 0;
431                 for (j = 0; words[j].name; j++) {
432                         if (!len
433                          || (len == words[j].namelen && strncasecmp(str, words[j].name, len) == 0)) {
434                                 if (priority >= words[j].priority) {
435                                         words[j].priority = priority;
436                                         levels[j] = lev;
437                                 }
438                                 if (len)
439                                         break;
440                         }
441                 }
442                 if (len && !words[j].name) {
443                         rprintf(FERROR, "Unknown %s item: \"%.*s\"\n",
444                                 words[j].help, len, str);
445                         exit_cleanup(RERR_SYNTAX);
446                 }
447                 if (!s)
448                         break;
449                 str = s;
450         }
451 }
452
453 /* Tell the user what all the info or debug flags mean. */
454 static void output_item_help(struct output_struct *words)
455 {
456         short *levels = words == info_words ? info_levels : debug_levels;
457         const char **verbosity = words == info_words ? info_verbosity : debug_verbosity;
458         char buf[128], *opt, *fmt = "%-10s %s\n";
459         int j;
460
461         reset_output_levels();
462
463         rprintf(FINFO, "Use OPT or OPT1 for level 1 output, OPT2 for level 2, etc.; OPT0 silences.\n");
464         rprintf(FINFO, "\n");
465         for (j = 0; words[j].name; j++)
466                 rprintf(FINFO, fmt, words[j].name, words[j].help);
467         rprintf(FINFO, "\n");
468
469         snprintf(buf, sizeof buf, "Set all %s options (e.g. all%d)",
470                  words[j].help, MAX_OUT_LEVEL);
471         rprintf(FINFO, fmt, "ALL", buf);
472
473         snprintf(buf, sizeof buf, "Silence all %s options (same as all0)",
474                  words[j].help);
475         rprintf(FINFO, fmt, "NONE", buf);
476
477         rprintf(FINFO, fmt, "HELP", "Output this help message");
478         rprintf(FINFO, "\n");
479         rprintf(FINFO, "Options added for each increase in verbose level:\n");
480
481         for (j = 1; j <= MAX_VERBOSITY; j++) {
482                 parse_output_words(words, levels, verbosity[j], HELP_PRIORITY);
483                 opt = make_output_option(words, levels, W_CLI|W_SRV|W_SND|W_REC);
484                 if (opt) {
485                         rprintf(FINFO, "%d) %s\n", j, strchr(opt, '=')+1);
486                         free(opt);
487                 }
488                 reset_output_levels();
489         }
490 }
491
492 /* The --verbose option now sets info+debug flags. */
493 static void set_output_verbosity(int level, uchar priority)
494 {
495         int j;
496
497         if (level > MAX_VERBOSITY)
498                 level = MAX_VERBOSITY;
499
500         for (j = 1; j <= level; j++) {
501                 parse_output_words(info_words, info_levels, info_verbosity[j], priority);
502                 parse_output_words(debug_words, debug_levels, debug_verbosity[j], priority);
503         }
504 }
505
506 /* Limit the info+debug flag levels given a verbose-option level limit. */
507 void limit_output_verbosity(int level)
508 {
509         short info_limits[COUNT_INFO], debug_limits[COUNT_DEBUG];
510         int j;
511
512         if (level > MAX_VERBOSITY)
513                 return;
514
515         memset(info_limits, 0, sizeof info_limits);
516         memset(debug_limits, 0, sizeof debug_limits);
517
518         /* Compute the level limits in the above arrays. */
519         for (j = 1; j <= level; j++) {
520                 parse_output_words(info_words, info_limits, info_verbosity[j], LIMIT_PRIORITY);
521                 parse_output_words(debug_words, debug_limits, debug_verbosity[j], LIMIT_PRIORITY);
522         }
523
524         for (j = 0; j < COUNT_INFO; j++) {
525                 if (info_levels[j] > info_limits[j])
526                         info_levels[j] = info_limits[j];
527         }
528
529         for (j = 0; j < COUNT_DEBUG; j++) {
530                 if (debug_levels[j] > debug_limits[j])
531                         debug_levels[j] = debug_limits[j];
532         }
533 }
534
535 void reset_output_levels(void)
536 {
537         int j;
538
539         memset(info_levels, 0, sizeof info_levels);
540         memset(debug_levels, 0, sizeof debug_levels);
541
542         for (j = 0; j < COUNT_INFO; j++)
543                 info_words[j].priority = DEFAULT_PRIORITY;
544
545         for (j = 0; j < COUNT_DEBUG; j++)
546                 debug_words[j].priority = DEFAULT_PRIORITY;
547 }
548
549 void negate_output_levels(void)
550 {
551         int j;
552
553         for (j = 0; j < COUNT_INFO; j++)
554                 info_levels[j] *= -1;
555
556         for (j = 0; j < COUNT_DEBUG; j++)
557                 debug_levels[j] *= -1;
558 }
559
560 static void print_rsync_version(enum logcode f)
561 {
562         char *subprotocol = "";
563         char const *got_socketpair = "no ";
564         char const *have_inplace = "no ";
565         char const *hardlinks = "no ";
566         char const *prealloc = "no ";
567         char const *symtimes = "no ";
568         char const *acls = "no ";
569         char const *xattrs = "no ";
570         char const *links = "no ";
571         char const *iconv = "no ";
572         char const *ipv6 = "no ";
573         STRUCT_STAT *dumstat;
574
575 #if SUBPROTOCOL_VERSION != 0
576         if (asprintf(&subprotocol, ".PR%d", SUBPROTOCOL_VERSION) < 0)
577                 out_of_memory("print_rsync_version");
578 #endif
579 #ifdef HAVE_SOCKETPAIR
580         got_socketpair = "";
581 #endif
582 #ifdef HAVE_FTRUNCATE
583         have_inplace = "";
584 #endif
585 #ifdef SUPPORT_HARD_LINKS
586         hardlinks = "";
587 #endif
588 #ifdef SUPPORT_PREALLOCATION
589         prealloc = "";
590 #endif
591 #ifdef SUPPORT_ACLS
592         acls = "";
593 #endif
594 #ifdef SUPPORT_XATTRS
595         xattrs = "";
596 #endif
597 #ifdef SUPPORT_LINKS
598         links = "";
599 #endif
600 #ifdef INET6
601         ipv6 = "";
602 #endif
603 #ifdef ICONV_OPTION
604         iconv = "";
605 #endif
606 #ifdef CAN_SET_SYMLINK_TIMES
607         symtimes = "";
608 #endif
609
610         rprintf(f, "%s  version %s  protocol version %d%s\n",
611                 RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION, subprotocol);
612         rprintf(f, "Copyright (C) 1996-2011 by Andrew Tridgell, Wayne Davison, and others.\n");
613         rprintf(f, "Web site: http://rsync.samba.org/\n");
614         rprintf(f, "Capabilities:\n");
615         rprintf(f, "    %d-bit files, %d-bit inums, %d-bit timestamps, %d-bit long ints,\n",
616                 (int)(sizeof (OFF_T) * 8),
617                 (int)(sizeof dumstat->st_ino * 8), /* Don't check ino_t! */
618                 (int)(sizeof (time_t) * 8),
619                 (int)(sizeof (int64) * 8));
620         rprintf(f, "    %ssocketpairs, %shardlinks, %ssymlinks, %sIPv6, batchfiles, %sinplace,\n",
621                 got_socketpair, hardlinks, links, ipv6, have_inplace);
622         rprintf(f, "    %sappend, %sACLs, %sxattrs, %siconv, %ssymtimes, %sprealloc\n",
623                 have_inplace, acls, xattrs, iconv, symtimes, prealloc);
624
625 #ifdef MAINTAINER_MODE
626         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
627 #endif
628
629 #if SIZEOF_INT64 < 8
630         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
631 #endif
632         if (sizeof (int64) != SIZEOF_INT64) {
633                 rprintf(f,
634                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
635                         (int) SIZEOF_INT64, (int) sizeof (int64));
636         }
637
638         rprintf(f,"\n");
639         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
640         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
641         rprintf(f,"General Public Licence for details.\n");
642 }
643
644
645 void usage(enum logcode F)
646 {
647   print_rsync_version(F);
648
649   rprintf(F,"\n");
650   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
651   rprintf(F,"via a fast differencing algorithm.\n");
652
653   rprintf(F,"\n");
654   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
655   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
656   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
657   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
658   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
659   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
660   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
661   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
662   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
663   rprintf(F,"\n");
664   rprintf(F,"Options\n");
665   rprintf(F," -v, --verbose               increase verbosity\n");
666   rprintf(F,"     --info=FLAGS            fine-grained informational verbosity\n");
667   rprintf(F,"     --debug=FLAGS           fine-grained debug verbosity\n");
668   rprintf(F,"     --msgs2stderr           special output handling for debugging\n");
669   rprintf(F," -q, --quiet                 suppress non-error messages\n");
670   rprintf(F,"     --no-motd               suppress daemon-mode MOTD (see manpage caveat)\n");
671   rprintf(F," -c, --checksum              skip based on checksum, not mod-time & size\n");
672   rprintf(F," -a, --archive               archive mode; equals -rlptgoD (no -H,-A,-X)\n");
673   rprintf(F,"     --no-OPTION             turn off an implied OPTION (e.g. --no-D)\n");
674   rprintf(F," -r, --recursive             recurse into directories\n");
675   rprintf(F," -R, --relative              use relative path names\n");
676   rprintf(F,"     --no-implied-dirs       don't send implied dirs with --relative\n");
677   rprintf(F," -b, --backup                make backups (see --suffix & --backup-dir)\n");
678   rprintf(F,"     --backup-dir=DIR        make backups into hierarchy based in DIR\n");
679   rprintf(F,"     --suffix=SUFFIX         set backup suffix (default %s w/o --backup-dir)\n",BACKUP_SUFFIX);
680   rprintf(F," -u, --update                skip files that are newer on the receiver\n");
681   rprintf(F,"     --inplace               update destination files in-place (SEE MAN PAGE)\n");
682   rprintf(F,"     --append                append data onto shorter files\n");
683   rprintf(F,"     --append-verify         like --append, but with old data in file checksum\n");
684   rprintf(F," -d, --dirs                  transfer directories without recursing\n");
685   rprintf(F," -l, --links                 copy symlinks as symlinks\n");
686   rprintf(F," -L, --copy-links            transform symlink into referent file/dir\n");
687   rprintf(F,"     --copy-unsafe-links     only \"unsafe\" symlinks are transformed\n");
688   rprintf(F,"     --safe-links            ignore symlinks that point outside the source tree\n");
689   rprintf(F,"     --munge-links           munge symlinks to make them safer (but unusable)\n");
690   rprintf(F," -k, --copy-dirlinks         transform symlink to a dir into referent dir\n");
691   rprintf(F," -K, --keep-dirlinks         treat symlinked dir on receiver as dir\n");
692   rprintf(F," -H, --hard-links            preserve hard links\n");
693   rprintf(F," -p, --perms                 preserve permissions\n");
694   rprintf(F," -E, --executability         preserve the file's executability\n");
695   rprintf(F,"     --chmod=CHMOD           affect file and/or directory permissions\n");
696 #ifdef SUPPORT_ACLS
697   rprintf(F," -A, --acls                  preserve ACLs (implies --perms)\n");
698 #endif
699 #ifdef SUPPORT_XATTRS
700   rprintf(F," -X, --xattrs                preserve extended attributes\n");
701 #endif
702   rprintf(F," -o, --owner                 preserve owner (super-user only)\n");
703   rprintf(F," -g, --group                 preserve group\n");
704   rprintf(F,"     --devices               preserve device files (super-user only)\n");
705   rprintf(F,"     --specials              preserve special files\n");
706   rprintf(F," -D                          same as --devices --specials\n");
707   rprintf(F," -t, --times                 preserve modification times\n");
708   rprintf(F," -O, --omit-dir-times        omit directories from --times\n");
709   rprintf(F," -J, --omit-link-times       omit symlinks from --times\n");
710   rprintf(F,"     --super                 receiver attempts super-user activities\n");
711 #ifdef SUPPORT_XATTRS
712   rprintf(F,"     --fake-super            store/recover privileged attrs using xattrs\n");
713 #endif
714   rprintf(F," -S, --sparse                handle sparse files efficiently\n");
715 #ifdef SUPPORT_PREALLOCATION
716   rprintf(F,"     --preallocate           allocate dest files before writing them\n");
717 #else
718   rprintf(F,"     --preallocate           pre-allocate dest files on remote receiver\n");
719 #endif
720   rprintf(F," -n, --dry-run               perform a trial run with no changes made\n");
721   rprintf(F," -W, --whole-file            copy files whole (without delta-xfer algorithm)\n");
722   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
723   rprintf(F," -B, --block-size=SIZE       force a fixed checksum block-size\n");
724   rprintf(F," -e, --rsh=COMMAND           specify the remote shell to use\n");
725   rprintf(F,"     --rsync-path=PROGRAM    specify the rsync to run on the remote machine\n");
726   rprintf(F,"     --existing              skip creating new files on receiver\n");
727   rprintf(F,"     --ignore-existing       skip updating files that already exist on receiver\n");
728   rprintf(F,"     --remove-source-files   sender removes synchronized files (non-dirs)\n");
729   rprintf(F,"     --del                   an alias for --delete-during\n");
730   rprintf(F,"     --delete                delete extraneous files from destination dirs\n");
731   rprintf(F,"     --delete-before         receiver deletes before transfer, not during\n");
732   rprintf(F,"     --delete-during         receiver deletes during the transfer\n");
733   rprintf(F,"     --delete-delay          find deletions during, delete after\n");
734   rprintf(F,"     --delete-after          receiver deletes after transfer, not during\n");
735   rprintf(F,"     --delete-excluded       also delete excluded files from destination dirs\n");
736   rprintf(F,"     --ignore-missing-args   ignore missing source args without error\n");
737   rprintf(F,"     --delete-missing-args   delete missing source args from destination\n");
738   rprintf(F,"     --ignore-errors         delete even if there are I/O errors\n");
739   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
740   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
741   rprintf(F,"     --max-size=SIZE         don't transfer any file larger than SIZE\n");
742   rprintf(F,"     --min-size=SIZE         don't transfer any file smaller than SIZE\n");
743   rprintf(F,"     --partial               keep partially transferred files\n");
744   rprintf(F,"     --partial-dir=DIR       put a partially transferred file into DIR\n");
745   rprintf(F,"     --delay-updates         put all updated files into place at transfer's end\n");
746   rprintf(F," -m, --prune-empty-dirs      prune empty directory chains from the file-list\n");
747   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
748   rprintf(F,"     --usermap=STRING        custom username mapping\n");
749   rprintf(F,"     --groupmap=STRING       custom groupname mapping\n");
750   rprintf(F,"     --chown=USER:GROUP      simple username/groupname mapping\n");
751   rprintf(F,"     --timeout=SECONDS       set I/O timeout in seconds\n");
752   rprintf(F,"     --contimeout=SECONDS    set daemon connection timeout in seconds\n");
753   rprintf(F," -I, --ignore-times          don't skip files that match in size and mod-time\n");
754   rprintf(F," -M, --remote-option=OPTION  send OPTION to the remote side only\n");
755   rprintf(F,"     --size-only             skip files that match in size\n");
756   rprintf(F,"     --modify-window=NUM     compare mod-times with reduced accuracy\n");
757   rprintf(F," -T, --temp-dir=DIR          create temporary files in directory DIR\n");
758   rprintf(F," -y, --fuzzy                 find similar file for basis if no dest file\n");
759   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
760   rprintf(F,"     --copy-dest=DIR         ... and include copies of unchanged files\n");
761   rprintf(F,"     --link-dest=DIR         hardlink to files in DIR when unchanged\n");
762   rprintf(F," -z, --compress              compress file data during the transfer\n");
763   rprintf(F,"     --compress-level=NUM    explicitly set compression level\n");
764   rprintf(F,"     --skip-compress=LIST    skip compressing files with a suffix in LIST\n");
765   rprintf(F," -C, --cvs-exclude           auto-ignore files the same way CVS does\n");
766   rprintf(F," -f, --filter=RULE           add a file-filtering RULE\n");
767   rprintf(F," -F                          same as --filter='dir-merge /.rsync-filter'\n");
768   rprintf(F,"                             repeated: --filter='- .rsync-filter'\n");
769   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
770   rprintf(F,"     --exclude-from=FILE     read exclude patterns from FILE\n");
771   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
772   rprintf(F,"     --include-from=FILE     read include patterns from FILE\n");
773   rprintf(F,"     --files-from=FILE       read list of source-file names from FILE\n");
774   rprintf(F," -0, --from0                 all *-from/filter files are delimited by 0s\n");
775   rprintf(F," -s, --protect-args          no space-splitting; only wildcard special-chars\n");
776   rprintf(F,"     --address=ADDRESS       bind address for outgoing socket to daemon\n");
777   rprintf(F,"     --port=PORT             specify double-colon alternate port number\n");
778   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
779   rprintf(F,"     --blocking-io           use blocking I/O for the remote shell\n");
780   rprintf(F,"     --stats                 give some file-transfer stats\n");
781   rprintf(F," -8, --8-bit-output          leave high-bit chars unescaped in output\n");
782   rprintf(F," -h, --human-readable        output numbers in a human-readable format\n");
783   rprintf(F,"     --progress              show progress during transfer\n");
784   rprintf(F," -P                          same as --partial --progress\n");
785   rprintf(F," -i, --itemize-changes       output a change-summary for all updates\n");
786   rprintf(F,"     --out-format=FORMAT     output updates using the specified FORMAT\n");
787   rprintf(F,"     --log-file=FILE         log what we're doing to the specified FILE\n");
788   rprintf(F,"     --log-file-format=FMT   log updates using the specified FMT\n");
789   rprintf(F,"     --password-file=FILE    read daemon-access password from FILE\n");
790   rprintf(F,"     --list-only             list the files instead of copying them\n");
791   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
792   rprintf(F,"     --write-batch=FILE      write a batched update to FILE\n");
793   rprintf(F,"     --only-write-batch=FILE like --write-batch but w/o updating destination\n");
794   rprintf(F,"     --read-batch=FILE       read a batched update from FILE\n");
795   rprintf(F,"     --protocol=NUM          force an older protocol version to be used\n");
796 #ifdef ICONV_OPTION
797   rprintf(F,"     --iconv=CONVERT_SPEC    request charset conversion of filenames\n");
798 #endif
799   rprintf(F," -4, --ipv4                  prefer IPv4\n");
800   rprintf(F," -6, --ipv6                  prefer IPv6\n");
801   rprintf(F,"     --version               print version number\n");
802   rprintf(F,"(-h) --help                  show this help (-h is --help only if used alone)\n");
803
804   rprintf(F,"\n");
805   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
806   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
807   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
808 }
809
810 enum {OPT_VERSION = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
811       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
812       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
813       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
814       OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, OPT_INFO, OPT_DEBUG,
815       OPT_USERMAP, OPT_GROUPMAP, OPT_CHOWN, OPT_BWLIMIT,
816       OPT_SERVER, OPT_REFUSED_BASE = 9000};
817
818 static struct poptOption long_options[] = {
819   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
820   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
821   {"version",          0,  POPT_ARG_NONE,   0, OPT_VERSION, 0, 0},
822   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
823   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
824   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
825   {"info",             0,  POPT_ARG_STRING, 0, OPT_INFO, 0, 0 },
826   {"debug",            0,  POPT_ARG_STRING, 0, OPT_DEBUG, 0, 0 },
827   {"msgs2stderr",      0,  POPT_ARG_NONE,   &msgs2stderr, 0, 0, 0 },
828   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
829   {"motd",             0,  POPT_ARG_VAL,    &output_motd, 1, 0, 0 },
830   {"no-motd",          0,  POPT_ARG_VAL,    &output_motd, 0, 0, 0 },
831   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
832   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
833   {"no-human-readable",0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
834   {"no-h",             0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
835   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
836   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
837   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
838   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
839   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
840   {"inc-recursive",    0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
841   {"no-inc-recursive", 0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
842   {"i-r",              0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
843   {"no-i-r",           0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
844   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
845   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
846   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
847   {"old-dirs",         0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
848   {"old-d",            0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
849   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
850   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
851   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
852   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
853   {"acls",            'A', POPT_ARG_NONE,   0, 'A', 0, 0 },
854   {"no-acls",          0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
855   {"no-A",             0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
856   {"xattrs",          'X', POPT_ARG_NONE,   0, 'X', 0, 0 },
857   {"no-xattrs",        0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
858   {"no-X",             0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
859   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
860   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
861   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
862   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 1, 0, 0 },
863   {"no-omit-dir-times",0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
864   {"no-O",             0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
865   {"omit-link-times", 'J', POPT_ARG_VAL,    &omit_link_times, 1, 0, 0 },
866   {"no-omit-link-times",0, POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
867   {"no-J",             0,  POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
868   {"modify-window",    0,  POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
869   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
870   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
871   {"fake-super",       0,  POPT_ARG_VAL,    &am_root, -1, 0, 0 },
872   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
873   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
874   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
875   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
876   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
877   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
878   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
879   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
880   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
881   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
882   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
883   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
884   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
885   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
886   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
887   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
888   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
889   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
890   {"munge-links",      0,  POPT_ARG_VAL,    &munge_symlinks, 1, 0, 0 },
891   {"no-munge-links",   0,  POPT_ARG_VAL,    &munge_symlinks, 0, 0, 0 },
892   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
893   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
894   {"hard-links",      'H', POPT_ARG_NONE,   0, 'H', 0, 0 },
895   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
896   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
897   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
898   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
899   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
900   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
901   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
902   {"i-d",              0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
903   {"no-i-d",           0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
904   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
905   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
906   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
907   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
908   {"no-one-file-system",0, POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
909   {"no-x",             0,  POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
910   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
911   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
912   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
913   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
914   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
915   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
916   {"sparse",          'S', POPT_ARG_VAL,    &sparse_files, 1, 0, 0 },
917   {"no-sparse",        0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
918   {"no-S",             0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
919   {"preallocate",      0,  POPT_ARG_NONE,   &preallocate_files, 0, 0, 0},
920   {"inplace",          0,  POPT_ARG_VAL,    &inplace, 1, 0, 0 },
921   {"no-inplace",       0,  POPT_ARG_VAL,    &inplace, 0, 0, 0 },
922   {"append",           0,  POPT_ARG_NONE,   0, OPT_APPEND, 0, 0 },
923   {"append-verify",    0,  POPT_ARG_VAL,    &append_mode, 2, 0, 0 },
924   {"no-append",        0,  POPT_ARG_VAL,    &append_mode, 0, 0, 0 },
925   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
926   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
927   {"delete-before",    0,  POPT_ARG_NONE,   &delete_before, 0, 0, 0 },
928   {"delete-during",    0,  POPT_ARG_VAL,    &delete_during, 1, 0, 0 },
929   {"delete-delay",     0,  POPT_ARG_VAL,    &delete_during, 2, 0, 0 },
930   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
931   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
932   {"delete-missing-args",0,POPT_BIT_SET,    &missing_args, 2, 0, 0 },
933   {"ignore-missing-args",0,POPT_BIT_SET,    &missing_args, 1, 0, 0 },
934   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_source_files, 2, 0, 0 }, /* deprecated */
935   {"remove-source-files",0,POPT_ARG_VAL,    &remove_source_files, 1, 0, 0 },
936   {"force",            0,  POPT_ARG_VAL,    &force_delete, 1, 0, 0 },
937   {"no-force",         0,  POPT_ARG_VAL,    &force_delete, 0, 0, 0 },
938   {"ignore-errors",    0,  POPT_ARG_VAL,    &ignore_errors, 1, 0, 0 },
939   {"no-ignore-errors", 0,  POPT_ARG_VAL,    &ignore_errors, 0, 0, 0 },
940   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
941   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
942   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
943   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
944   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
945   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
946   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
947   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
948   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
949   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
950   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
951   {"checksum",        'c', POPT_ARG_VAL,    &always_checksum, 1, 0, 0 },
952   {"no-checksum",      0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
953   {"no-c",             0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
954   {"block-size",      'B', POPT_ARG_LONG,   &block_size, 0, 0, 0 },
955   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
956   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
957   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
958   {"fuzzy",           'y', POPT_ARG_VAL,    &fuzzy_basis, 1, 0, 0 },
959   {"no-fuzzy",         0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
960   {"no-y",             0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
961   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
962   {"no-compress",      0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
963   {"no-z",             0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
964   {"skip-compress",    0,  POPT_ARG_STRING, &skip_compress, 0, 0, 0 },
965   {"compress-level",   0,  POPT_ARG_INT,    &def_compress_level, 'z', 0, 0 },
966   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
967   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
968   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
969   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
970   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
971   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
972   {"delay-updates",    0,  POPT_ARG_VAL,    &delay_updates, 1, 0, 0 },
973   {"no-delay-updates", 0,  POPT_ARG_VAL,    &delay_updates, 0, 0, 0 },
974   {"prune-empty-dirs",'m', POPT_ARG_VAL,    &prune_empty_dirs, 1, 0, 0 },
975   {"no-prune-empty-dirs",0,POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
976   {"no-m",             0,  POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
977   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
978   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
979   {"out-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 },
980   {"log-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 }, /* DEPRECATED */
981   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
982   {"no-itemize-changes",0, POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
983   {"no-i",             0,  POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
984   {"bwlimit",          0,  POPT_ARG_STRING, &bwlimit_arg, OPT_BWLIMIT, 0, 0 },
985   {"no-bwlimit",       0,  POPT_ARG_VAL,    &bwlimit, 0, 0, 0 },
986   {"backup",          'b', POPT_ARG_VAL,    &make_backups, 1, 0, 0 },
987   {"no-backup",        0,  POPT_ARG_VAL,    &make_backups, 0, 0, 0 },
988   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
989   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
990   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
991   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
992   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
993   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
994   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
995   {"from0",           '0', POPT_ARG_VAL,    &eol_nulls, 1, 0, 0},
996   {"no-from0",         0,  POPT_ARG_VAL,    &eol_nulls, 0, 0, 0},
997   {"protect-args",    's', POPT_ARG_VAL,    &protect_args, 1, 0, 0},
998   {"no-protect-args",  0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
999   {"no-s",             0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1000   {"numeric-ids",      0,  POPT_ARG_VAL,    &numeric_ids, 1, 0, 0 },
1001   {"no-numeric-ids",   0,  POPT_ARG_VAL,    &numeric_ids, 0, 0, 0 },
1002   {"usermap",          0,  POPT_ARG_STRING, 0, OPT_USERMAP, 0, 0 },
1003   {"groupmap",         0,  POPT_ARG_STRING, 0, OPT_GROUPMAP, 0, 0 },
1004   {"chown",            0,  POPT_ARG_STRING, 0, OPT_CHOWN, 0, 0 },
1005   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
1006   {"no-timeout",       0,  POPT_ARG_VAL,    &io_timeout, 0, 0, 0 },
1007   {"contimeout",       0,  POPT_ARG_INT,    &connect_timeout, 0, 0, 0 },
1008   {"no-contimeout",    0,  POPT_ARG_VAL,    &connect_timeout, 0, 0, 0 },
1009   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
1010   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
1011   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1012 #ifdef ICONV_OPTION
1013   {"iconv",            0,  POPT_ARG_STRING, &iconv_opt, 0, 0, 0 },
1014   {"no-iconv",         0,  POPT_ARG_NONE,   0, OPT_NO_ICONV, 0, 0 },
1015 #endif
1016   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1017   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1018   {"8-bit-output",    '8', POPT_ARG_VAL,    &allow_8bit_chars, 1, 0, 0 },
1019   {"no-8-bit-output",  0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1020   {"no-8",             0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1021   {"qsort",            0,  POPT_ARG_NONE,   &use_qsort, 0, 0, 0 },
1022   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1023   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1024   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1025   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
1026   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
1027   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
1028   {"remote-option",   'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1029   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1030   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
1031   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
1032   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
1033   /* All the following options switch us into daemon-mode option-parsing. */
1034   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1035   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1036   {"dparam",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1037   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1038   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1039   {0,0,0,0, 0, 0, 0}
1040 };
1041
1042 static void daemon_usage(enum logcode F)
1043 {
1044   print_rsync_version(F);
1045
1046   rprintf(F,"\n");
1047   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
1048   rprintf(F,"     --address=ADDRESS       bind to the specified address\n");
1049   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
1050   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
1051   rprintf(F," -M, --dparam=OVERRIDE       override global daemon config parameter\n");
1052   rprintf(F,"     --no-detach             do not detach from the parent\n");
1053   rprintf(F,"     --port=PORT             listen on alternate port number\n");
1054   rprintf(F,"     --log-file=FILE         override the \"log file\" setting\n");
1055   rprintf(F,"     --log-file-format=FMT   override the \"log format\" setting\n");
1056   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
1057   rprintf(F," -v, --verbose               increase verbosity\n");
1058   rprintf(F," -4, --ipv4                  prefer IPv4\n");
1059   rprintf(F," -6, --ipv6                  prefer IPv6\n");
1060   rprintf(F,"     --help                  show this help screen\n");
1061
1062   rprintf(F,"\n");
1063   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
1064   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
1065 }
1066
1067 static struct poptOption long_daemon_options[] = {
1068   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
1069   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1070   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
1071   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
1072   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
1073   {"dparam",          'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1074   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1075   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1076   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
1077   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
1078   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
1079   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
1080   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1081   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1082   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1083   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
1084   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1085   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
1086   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1087   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1088   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
1089   {0,0,0,0, 0, 0, 0}
1090 };
1091
1092
1093 static char err_buf[200];
1094
1095
1096 /**
1097  * Store the option error message, if any, so that we can log the
1098  * connection attempt (which requires parsing the options), and then
1099  * show the error later on.
1100  **/
1101 void option_error(void)
1102 {
1103         if (!err_buf[0]) {
1104                 strlcpy(err_buf, "Error parsing options: option may "
1105                         "be supported on client but not on server?\n",
1106                         sizeof err_buf);
1107         }
1108
1109         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
1110         msleep(20);
1111 }
1112
1113
1114 /**
1115  * Tweak the option table to disable all options that the rsyncd.conf
1116  * file has told us to refuse.
1117  **/
1118 static void set_refuse_options(char *bp)
1119 {
1120         struct poptOption *op;
1121         char *cp, shortname[2];
1122         int is_wild, found_match;
1123
1124         shortname[1] = '\0';
1125
1126         while (1) {
1127                 while (*bp == ' ') bp++;
1128                 if (!*bp)
1129                         break;
1130                 if ((cp = strchr(bp, ' ')) != NULL)
1131                         *cp= '\0';
1132                 is_wild = strpbrk(bp, "*?[") != NULL;
1133                 found_match = 0;
1134                 for (op = long_options; ; op++) {
1135                         *shortname = op->shortName;
1136                         if (!op->longName && !*shortname)
1137                                 break;
1138                         if ((op->longName && wildmatch(bp, op->longName))
1139                             || (*shortname && wildmatch(bp, shortname))) {
1140                                 if (op->argInfo == POPT_ARG_VAL)
1141                                         op->argInfo = POPT_ARG_NONE;
1142                                 op->val = (op - long_options) + OPT_REFUSED_BASE;
1143                                 found_match = 1;
1144                                 /* These flags are set to let us easily check
1145                                  * an implied option later in the code. */
1146                                 switch (*shortname) {
1147                                 case 'r': case 'd': case 'l': case 'p':
1148                                 case 't': case 'g': case 'o': case 'D':
1149                                         refused_archive_part = op->val;
1150                                         break;
1151                                 case 'z':
1152                                         refused_compress = op->val;
1153                                         break;
1154                                 case '\0':
1155                                         if (wildmatch("delete", op->longName))
1156                                                 refused_delete = op->val;
1157                                         else if (wildmatch("delete-before", op->longName))
1158                                                 refused_delete_before = op->val;
1159                                         else if (wildmatch("delete-during", op->longName))
1160                                                 refused_delete_during = op->val;
1161                                         else if (wildmatch("partial", op->longName))
1162                                                 refused_partial = op->val;
1163                                         else if (wildmatch("progress", op->longName))
1164                                                 refused_progress = op->val;
1165                                         else if (wildmatch("inplace", op->longName))
1166                                                 refused_inplace = op->val;
1167                                         else if (wildmatch("no-iconv", op->longName))
1168                                                 refused_no_iconv = op->val;
1169                                         break;
1170                                 }
1171                                 if (!is_wild)
1172                                         break;
1173                         }
1174                 }
1175                 if (!found_match) {
1176                         rprintf(FLOG, "No match for refuse-options string \"%s\"\n",
1177                                 bp);
1178                 }
1179                 if (!cp)
1180                         break;
1181                 *cp = ' ';
1182                 bp = cp + 1;
1183         }
1184 }
1185
1186
1187 static int count_args(const char **argv)
1188 {
1189         int i = 0;
1190
1191         if (argv) {
1192                 while (argv[i] != NULL)
1193                         i++;
1194         }
1195
1196         return i;
1197 }
1198
1199
1200 static OFF_T parse_size_arg(char **size_arg, char def_suf)
1201 {
1202         int reps, mult, make_compatible = 0;
1203         const char *arg;
1204         OFF_T size = 1;
1205
1206         for (arg = *size_arg; isDigit(arg); arg++) {}
1207         if (*arg == '.')
1208                 for (arg++; isDigit(arg); arg++) {}
1209         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
1210         case 'b': case 'B':
1211                 reps = 0;
1212                 break;
1213         case 'k': case 'K':
1214                 reps = 1;
1215                 break;
1216         case 'm': case 'M':
1217                 reps = 2;
1218                 break;
1219         case 'g': case 'G':
1220                 reps = 3;
1221                 break;
1222         default:
1223                 return -1;
1224         }
1225         if (*arg == 'b' || *arg == 'B')
1226                 mult = 1000, make_compatible = 1, arg++;
1227         else if (!*arg || *arg == '+' || *arg == '-')
1228                 mult = 1024;
1229         else if (strncasecmp(arg, "ib", 2) == 0)
1230                 mult = 1024, arg += 2;
1231         else
1232                 return -1;
1233         while (reps--)
1234                 size *= mult;
1235         size *= atof(*size_arg);
1236         if ((*arg == '+' || *arg == '-') && arg[1] == '1')
1237                 size += atoi(arg), make_compatible = 1, arg += 2;
1238         if (*arg)
1239                 return -1;
1240         if (size > 0 && make_compatible && def_suf == 'b') {
1241                 /* We convert this manually because we may need %lld precision,
1242                  * and that's not a portable sprintf() escape. */
1243                 char buf[128], *s = buf + sizeof buf - 1;
1244                 OFF_T num = size;
1245                 *s = '\0';
1246                 while (num) {
1247                         *--s = (char)(num % 10) + '0';
1248                         num /= 10;
1249                 }
1250                 if (!(*size_arg = strdup(s)))
1251                         out_of_memory("parse_size_arg");
1252         }
1253         return size;
1254 }
1255
1256
1257 static void create_refuse_error(int which)
1258 {
1259         /* The "which" value is the index + OPT_REFUSED_BASE. */
1260         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
1261         int n = snprintf(err_buf, sizeof err_buf,
1262                          "The server is configured to refuse --%s\n",
1263                          op->longName) - 1;
1264         if (op->shortName) {
1265                 snprintf(err_buf + n, sizeof err_buf - n,
1266                          " (-%c)\n", op->shortName);
1267         }
1268 }
1269
1270
1271 /**
1272  * Process command line arguments.  Called on both local and remote.
1273  *
1274  * @retval 1 if all options are OK; with globals set to appropriate
1275  * values
1276  *
1277  * @retval 0 on error, with err_buf containing an explanation
1278  **/
1279 int parse_arguments(int *argc_p, const char ***argv_p)
1280 {
1281         static poptContext pc;
1282         char *ref = lp_refuse_options(module_id);
1283         const char *arg, **argv = *argv_p;
1284         int argc = *argc_p;
1285         int opt;
1286
1287         if (ref && *ref)
1288                 set_refuse_options(ref);
1289         if (am_daemon) {
1290                 set_refuse_options("log-file*");
1291 #ifdef ICONV_OPTION
1292                 if (!*lp_charset(module_id))
1293                         set_refuse_options("iconv");
1294 #endif
1295         }
1296
1297 #ifdef ICONV_OPTION
1298         if (!am_daemon && protect_args <= 0 && (arg = getenv("RSYNC_ICONV")) != NULL && *arg)
1299                 iconv_opt = strdup(arg);
1300 #endif
1301
1302         /* TODO: Call poptReadDefaultConfig; handle errors. */
1303
1304         /* The context leaks in case of an error, but if there's a
1305          * problem we always exit anyhow. */
1306         if (pc)
1307                 poptFreeContext(pc);
1308         pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1309         if (!am_server)
1310                 poptReadDefaultConfig(pc, 0);
1311
1312         while ((opt = poptGetNextOpt(pc)) != -1) {
1313                 /* most options are handled automatically by popt;
1314                  * only special cases are returned and listed here. */
1315
1316                 switch (opt) {
1317                 case OPT_VERSION:
1318                         print_rsync_version(FINFO);
1319                         exit_cleanup(0);
1320
1321                 case OPT_SERVER:
1322                         if (!am_server) {
1323                                 /* Disable popt aliases on the server side and
1324                                  * then start parsing the options again. */
1325                                 poptFreeContext(pc);
1326                                 pc = poptGetContext(RSYNC_NAME, argc, argv,
1327                                                     long_options, 0);
1328                                 am_server = 1;
1329                         }
1330 #ifdef ICONV_OPTION
1331                         iconv_opt = NULL;
1332 #endif
1333                         break;
1334
1335                 case OPT_SENDER:
1336                         if (!am_server) {
1337                                 usage(FERROR);
1338                                 exit_cleanup(RERR_SYNTAX);
1339                         }
1340                         am_sender = 1;
1341                         break;
1342
1343                 case OPT_DAEMON:
1344                         if (am_daemon) {
1345                                 strlcpy(err_buf,
1346                                         "Attempt to hack rsync thwarted!\n",
1347                                         sizeof err_buf);
1348                                 return 0;
1349                         }
1350 #ifdef ICONV_OPTION
1351                         iconv_opt = NULL;
1352 #endif
1353                         protect_args = 0;
1354                         poptFreeContext(pc);
1355                         pc = poptGetContext(RSYNC_NAME, argc, argv,
1356                                             long_daemon_options, 0);
1357                         while ((opt = poptGetNextOpt(pc)) != -1) {
1358                                 char **cpp;
1359                                 switch (opt) {
1360                                 case 'h':
1361                                         daemon_usage(FINFO);
1362                                         exit_cleanup(0);
1363
1364                                 case 'M':
1365                                         arg = poptGetOptArg(pc);
1366                                         if (!strchr(arg, '=')) {
1367                                                 rprintf(FERROR,
1368                                                     "--dparam value is missing an '=': %s\n",
1369                                                     arg);
1370                                                 goto daemon_error;
1371                                         }
1372                                         cpp = EXPAND_ITEM_LIST(&dparam_list, char *, 4);
1373                                         *cpp = strdup(arg);
1374                                         break;
1375
1376                                 case 'v':
1377                                         verbose++;
1378                                         break;
1379
1380                                 default:
1381                                         rprintf(FERROR,
1382                                             "rsync: %s: %s (in daemon mode)\n",
1383                                             poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1384                                             poptStrerror(opt));
1385                                         goto daemon_error;
1386                                 }
1387                         }
1388
1389                         if (dparam_list.count && !set_dparams(1))
1390                                 exit_cleanup(RERR_SYNTAX);
1391
1392                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1393                                 snprintf(err_buf, sizeof err_buf,
1394                                          "the --temp-dir path is WAY too long.\n");
1395                                 return 0;
1396                         }
1397
1398                         if (!daemon_opt) {
1399                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
1400                             daemon_error:
1401                                 rprintf(FERROR,
1402                                     "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
1403                                 exit_cleanup(RERR_SYNTAX);
1404                         }
1405
1406                         *argv_p = argv = poptGetArgs(pc);
1407                         *argc_p = argc = count_args(argv);
1408                         am_starting_up = 0;
1409                         daemon_opt = 0;
1410                         am_daemon = 1;
1411                         return 1;
1412
1413                 case OPT_MODIFY_WINDOW:
1414                         /* The value has already been set by popt, but
1415                          * we need to remember that we're using a
1416                          * non-default setting. */
1417                         modify_window_set = 1;
1418                         break;
1419
1420                 case OPT_FILTER:
1421                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1422                                         rule_template(0), 0);
1423                         break;
1424
1425                 case OPT_EXCLUDE:
1426                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1427                                         rule_template(0), XFLG_OLD_PREFIXES);
1428                         break;
1429
1430                 case OPT_INCLUDE:
1431                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1432                                         rule_template(FILTRULE_INCLUDE), XFLG_OLD_PREFIXES);
1433                         break;
1434
1435                 case OPT_EXCLUDE_FROM:
1436                 case OPT_INCLUDE_FROM:
1437                         arg = poptGetOptArg(pc);
1438                         if (sanitize_paths)
1439                                 arg = sanitize_path(NULL, arg, NULL, 0, SP_DEFAULT);
1440                         if (daemon_filter_list.head) {
1441                                 int rej;
1442                                 char *cp = strdup(arg);
1443                                 if (!cp)
1444                                         out_of_memory("parse_arguments");
1445                                 if (!*cp)
1446                                         rej = 1;
1447                                 else {
1448                                         char *dir = cp + (*cp == '/' ? module_dirlen : 0);
1449                                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1450                                         rej = check_filter(&daemon_filter_list, FLOG, dir, 0) < 0;
1451                                 }
1452                                 free(cp);
1453                                 if (rej)
1454                                         goto options_rejected;
1455                         }
1456                         parse_filter_file(&filter_list, arg,
1457                                 rule_template(opt == OPT_INCLUDE_FROM ? FILTRULE_INCLUDE : 0),
1458                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
1459                         break;
1460
1461                 case 'a':
1462                         if (refused_archive_part) {
1463                                 create_refuse_error(refused_archive_part);
1464                                 return 0;
1465                         }
1466                         if (!recurse) /* preserve recurse == 2 */
1467                                 recurse = 1;
1468 #ifdef SUPPORT_LINKS
1469                         preserve_links = 1;
1470 #endif
1471                         preserve_perms = 1;
1472                         preserve_times = 1;
1473                         preserve_gid = 1;
1474                         preserve_uid = 1;
1475                         preserve_devices = 1;
1476                         preserve_specials = 1;
1477                         break;
1478
1479                 case 'D':
1480                         preserve_devices = preserve_specials = 1;
1481                         break;
1482
1483                 case OPT_NO_D:
1484                         preserve_devices = preserve_specials = 0;
1485                         break;
1486
1487                 case 'h':
1488                         human_readable++;
1489                         break;
1490
1491                 case 'H':
1492                         preserve_hard_links++;
1493                         break;
1494
1495                 case 'i':
1496                         itemize_changes++;
1497                         break;
1498
1499                 case 'v':
1500                         verbose++;
1501                         break;
1502
1503                 case 'q':
1504                         quiet++;
1505                         break;
1506
1507                 case 'x':
1508                         one_file_system++;
1509                         break;
1510
1511                 case 'F':
1512                         switch (++F_option_cnt) {
1513                         case 1:
1514                                 parse_filter_str(&filter_list,": /.rsync-filter",rule_template(0),0);
1515                                 break;
1516                         case 2:
1517                                 parse_filter_str(&filter_list,"- .rsync-filter",rule_template(0),0);
1518                                 break;
1519                         }
1520                         break;
1521
1522                 case 'P':
1523                         if (refused_partial || refused_progress) {
1524                                 create_refuse_error(refused_partial
1525                                     ? refused_partial : refused_progress);
1526                                 return 0;
1527                         }
1528                         do_progress = 1;
1529                         keep_partial = 1;
1530                         break;
1531
1532                 case 'z':
1533                         if (def_compress_level < Z_DEFAULT_COMPRESSION
1534                          || def_compress_level > Z_BEST_COMPRESSION) {
1535                                 snprintf(err_buf, sizeof err_buf,
1536                                         "--compress-level value is invalid: %d\n",
1537                                         def_compress_level);
1538                                 return 0;
1539                         }
1540                         do_compression = def_compress_level != Z_NO_COMPRESSION;
1541                         if (do_compression && refused_compress) {
1542                                 create_refuse_error(refused_compress);
1543                                 return 0;
1544                         }
1545                         break;
1546
1547                 case 'M':
1548                         arg = poptGetOptArg(pc);
1549                         if (*arg != '-') {
1550                                 snprintf(err_buf, sizeof err_buf,
1551                                         "Remote option must start with a dash: %s\n", arg);
1552                                 return 0;
1553                         }
1554                         if (remote_option_cnt+2 >= remote_option_alloc) {
1555                                 remote_option_alloc += 16;
1556                                 remote_options = realloc_array(remote_options,
1557                                                         const char *, remote_option_alloc);
1558                                 if (!remote_options)
1559                                         out_of_memory("parse_arguments");
1560                                 if (!remote_option_cnt)
1561                                         remote_options[0] = "ARG0";
1562                         }
1563                         remote_options[++remote_option_cnt] = arg;
1564                         remote_options[remote_option_cnt+1] = NULL;
1565                         break;
1566
1567                 case OPT_WRITE_BATCH:
1568                         /* batch_name is already set */
1569                         write_batch = 1;
1570                         break;
1571
1572                 case OPT_ONLY_WRITE_BATCH:
1573                         /* batch_name is already set */
1574                         write_batch = -1;
1575                         break;
1576
1577                 case OPT_READ_BATCH:
1578                         /* batch_name is already set */
1579                         read_batch = 1;
1580                         break;
1581
1582                 case OPT_NO_ICONV:
1583 #ifdef ICONV_OPTION
1584                         iconv_opt = NULL;
1585 #endif
1586                         break;
1587
1588                 case OPT_MAX_SIZE:
1589                         if ((max_size = parse_size_arg(&max_size_arg, 'b')) <= 0) {
1590                                 snprintf(err_buf, sizeof err_buf,
1591                                         "--max-size value is invalid: %s\n",
1592                                         max_size_arg);
1593                                 return 0;
1594                         }
1595                         break;
1596
1597                 case OPT_MIN_SIZE:
1598                         if ((min_size = parse_size_arg(&min_size_arg, 'b')) <= 0) {
1599                                 snprintf(err_buf, sizeof err_buf,
1600                                         "--min-size value is invalid: %s\n",
1601                                         min_size_arg);
1602                                 return 0;
1603                         }
1604                         break;
1605
1606                 case OPT_BWLIMIT:
1607                         {
1608                                 OFF_T limit = parse_size_arg(&bwlimit_arg, 'K');
1609                                 if (limit < 0) {
1610                                         snprintf(err_buf, sizeof err_buf,
1611                                                 "--bwlimit value is invalid: %s\n", bwlimit_arg);
1612                                         return 0;
1613                                 }
1614                                 bwlimit = (limit + 512) / 1024;
1615                                 if (limit && !bwlimit) {
1616                                         snprintf(err_buf, sizeof err_buf,
1617                                                 "--bwlimit value is too small: %s\n", bwlimit_arg);
1618                                         return 0;
1619                                 }
1620                         }
1621                         break;
1622
1623                 case OPT_APPEND:
1624                         if (am_server)
1625                                 append_mode++;
1626                         else
1627                                 append_mode = 1;
1628                         break;
1629
1630                 case OPT_LINK_DEST:
1631 #ifdef SUPPORT_HARD_LINKS
1632                         link_dest = 1;
1633                         dest_option = "--link-dest";
1634                         goto set_dest_dir;
1635 #else
1636                         snprintf(err_buf, sizeof err_buf,
1637                                  "hard links are not supported on this %s\n",
1638                                  am_server ? "server" : "client");
1639                         return 0;
1640 #endif
1641
1642                 case OPT_COPY_DEST:
1643                         copy_dest = 1;
1644                         dest_option = "--copy-dest";
1645                         goto set_dest_dir;
1646
1647                 case OPT_COMPARE_DEST:
1648                         compare_dest = 1;
1649                         dest_option = "--compare-dest";
1650                 set_dest_dir:
1651                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1652                                 snprintf(err_buf, sizeof err_buf,
1653                                         "ERROR: at most %d %s args may be specified\n",
1654                                         MAX_BASIS_DIRS, dest_option);
1655                                 return 0;
1656                         }
1657                         /* We defer sanitizing this arg until we know what
1658                          * our destination directory is going to be. */
1659                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1660                         break;
1661
1662                 case OPT_CHMOD:
1663                         arg = poptGetOptArg(pc);
1664                         if (!parse_chmod(arg, &chmod_modes)) {
1665                                 snprintf(err_buf, sizeof err_buf,
1666                                     "Invalid argument passed to --chmod (%s)\n",
1667                                     arg);
1668                                 return 0;
1669                         }
1670                         break;
1671
1672                 case OPT_INFO:
1673                         arg = poptGetOptArg(pc);
1674                         parse_output_words(info_words, info_levels, arg, USER_PRIORITY);
1675                         break;
1676
1677                 case OPT_DEBUG:
1678                         arg = poptGetOptArg(pc);
1679                         parse_output_words(debug_words, debug_levels, arg, USER_PRIORITY);
1680                         break;
1681
1682                 case OPT_USERMAP:
1683                         if (usermap) {
1684                                 if (usermap_via_chown) {
1685                                         snprintf(err_buf, sizeof err_buf,
1686                                             "--usermap conflicts with prior --chown.\n");
1687                                         return 0;
1688                                 }
1689                                 snprintf(err_buf, sizeof err_buf,
1690                                     "You can only specify --usermap once.\n");
1691                                 return 0;
1692                         }
1693                         usermap = (char *)poptGetOptArg(pc);
1694                         usermap_via_chown = False;
1695                         break;
1696
1697                 case OPT_GROUPMAP:
1698                         if (groupmap) {
1699                                 if (groupmap_via_chown) {
1700                                         snprintf(err_buf, sizeof err_buf,
1701                                             "--groupmap conflicts with prior --chown.\n");
1702                                         return 0;
1703                                 }
1704                                 snprintf(err_buf, sizeof err_buf,
1705                                     "You can only specify --groupmap once.\n");
1706                                 return 0;
1707                         }
1708                         groupmap = (char *)poptGetOptArg(pc);
1709                         groupmap_via_chown = False;
1710                         break;
1711
1712                 case OPT_CHOWN: {
1713                         const char *chown = poptGetOptArg(pc);
1714                         int len;
1715                         if ((arg = strchr(chown, ':')) != NULL)
1716                                 len = arg++ - chown;
1717                         else
1718                                 len = strlen(chown);
1719                         if (len) {
1720                                 if (usermap) {
1721                                         if (!usermap_via_chown) {
1722                                                 snprintf(err_buf, sizeof err_buf,
1723                                                     "--chown conflicts with prior --usermap.\n");
1724                                                 return 0;
1725                                         }
1726                                         snprintf(err_buf, sizeof err_buf,
1727                                             "You can only specify a user-affecting --chown once.\n");
1728                                         return 0;
1729                                 }
1730                                 if (asprintf(&usermap, "*:%.*s", len, chown) < 0)
1731                                         out_of_memory("parse_arguments");
1732                                 usermap_via_chown = True;
1733                         }
1734                         if (arg && *arg) {
1735                                 if (groupmap) {
1736                                         if (!groupmap_via_chown) {
1737                                                 snprintf(err_buf, sizeof err_buf,
1738                                                     "--chown conflicts with prior --groupmap.\n");
1739                                                 return 0;
1740                                         }
1741                                         snprintf(err_buf, sizeof err_buf,
1742                                             "You can only specify a group-affecting --chown once.\n");
1743                                         return 0;
1744                                 }
1745                                 if (asprintf(&groupmap, "*:%s", arg) < 0)
1746                                         out_of_memory("parse_arguments");
1747                                 groupmap_via_chown = True;
1748                         }
1749                         break;
1750                 }
1751
1752                 case OPT_HELP:
1753                         usage(FINFO);
1754                         exit_cleanup(0);
1755
1756                 case 'A':
1757 #ifdef SUPPORT_ACLS
1758                         preserve_acls = 1;
1759                         preserve_perms = 1;
1760                         break;
1761 #else
1762                         /* FIXME: this should probably be ignored with a
1763                          * warning and then countermeasures taken to
1764                          * restrict group and other access in the presence
1765                          * of any more restrictive ACLs, but this is safe
1766                          * for now */
1767                         snprintf(err_buf,sizeof(err_buf),
1768                                  "ACLs are not supported on this %s\n",
1769                                  am_server ? "server" : "client");
1770                         return 0;
1771 #endif
1772
1773                 case 'X':
1774 #ifdef SUPPORT_XATTRS
1775                         preserve_xattrs++;
1776                         break;
1777 #else
1778                         snprintf(err_buf,sizeof(err_buf),
1779                                  "extended attributes are not supported on this %s\n",
1780                                  am_server ? "server" : "client");
1781                         return 0;
1782 #endif
1783
1784                 default:
1785                         /* A large opt value means that set_refuse_options()
1786                          * turned this option off. */
1787                         if (opt >= OPT_REFUSED_BASE) {
1788                                 create_refuse_error(opt);
1789                                 return 0;
1790                         }
1791                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
1792                                  am_server ? "on remote machine: " : "",
1793                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1794                                  poptStrerror(opt));
1795                         return 0;
1796                 }
1797         }
1798
1799         if (protect_args < 0) {
1800                 if (am_server)
1801                         protect_args = 0;
1802                 else if ((arg = getenv("RSYNC_PROTECT_ARGS")) != NULL && *arg)
1803                         protect_args = atoi(arg) ? 1 : 0;
1804                 else {
1805 #ifdef RSYNC_USE_PROTECTED_ARGS
1806                         protect_args = 1;
1807 #else
1808                         protect_args = 0;
1809 #endif
1810                 }
1811         }
1812
1813         if (human_readable > 1 && argc == 2 && !am_server) {
1814                 /* Allow the old meaning of 'h' (--help) on its own. */
1815                 usage(FINFO);
1816                 exit_cleanup(0);
1817         }
1818
1819         set_output_verbosity(verbose, DEFAULT_PRIORITY);
1820
1821         if (do_stats) {
1822                 parse_output_words(info_words, info_levels,
1823                         verbose > 1 ? "stats3" : "stats2", DEFAULT_PRIORITY);
1824         }
1825
1826         if (human_readable) {
1827                 char buf[32];
1828                 snprintf(buf, sizeof buf, "%f", 3.14);
1829                 if (strchr(buf, '.') != NULL)
1830                         number_separator = ',';
1831                 else
1832                         number_separator = '.';
1833         }
1834
1835 #ifdef ICONV_OPTION
1836         if (iconv_opt && protect_args != 2) {
1837                 if (!am_server && strcmp(iconv_opt, "-") == 0)
1838                         iconv_opt = NULL;
1839                 else
1840                         need_unsorted_flist = 1;
1841         }
1842         if (refused_no_iconv && !iconv_opt) {
1843                 create_refuse_error(refused_no_iconv);
1844                 return 0;
1845         }
1846 #endif
1847
1848         if (protect_args == 1 && am_server)
1849                 return 1;
1850
1851         *argv_p = argv = poptGetArgs(pc);
1852         *argc_p = argc = count_args(argv);
1853
1854 #ifndef SUPPORT_LINKS
1855         if (preserve_links && !am_sender) {
1856                 snprintf(err_buf, sizeof err_buf,
1857                          "symlinks are not supported on this %s\n",
1858                          am_server ? "server" : "client");
1859                 return 0;
1860         }
1861 #endif
1862
1863 #ifndef SUPPORT_HARD_LINKS
1864         if (preserve_hard_links) {
1865                 snprintf(err_buf, sizeof err_buf,
1866                          "hard links are not supported on this %s\n",
1867                          am_server ? "server" : "client");
1868                 return 0;
1869         }
1870 #endif
1871
1872 #ifdef SUPPORT_XATTRS
1873         if (am_root < 0 && preserve_xattrs > 1) {
1874                 snprintf(err_buf, sizeof err_buf,
1875                          "--fake-super conflicts with -XX\n");
1876                 return 0;
1877         }
1878 #else
1879         if (am_root < 0) {
1880                 snprintf(err_buf, sizeof err_buf,
1881                          "--fake-super requires an rsync with extended attributes enabled\n");
1882                 return 0;
1883         }
1884 #endif
1885
1886         if (write_batch && read_batch) {
1887                 snprintf(err_buf, sizeof err_buf,
1888                         "--write-batch and --read-batch can not be used together\n");
1889                 return 0;
1890         }
1891         if (write_batch > 0 || read_batch) {
1892                 if (am_server) {
1893                         rprintf(FINFO,
1894                                 "ignoring --%s-batch option sent to server\n",
1895                                 write_batch ? "write" : "read");
1896                         /* We don't actually exit_cleanup(), so that we can
1897                          * still service older version clients that still send
1898                          * batch args to server. */
1899                         read_batch = write_batch = 0;
1900                         batch_name = NULL;
1901                 } else if (dry_run)
1902                         write_batch = 0;
1903         } else if (write_batch < 0 && dry_run)
1904                 write_batch = 0;
1905         if (read_batch && files_from) {
1906                 snprintf(err_buf, sizeof err_buf,
1907                         "--read-batch cannot be used with --files-from\n");
1908                 return 0;
1909         }
1910         if (read_batch && remove_source_files) {
1911                 snprintf(err_buf, sizeof err_buf,
1912                         "--read-batch cannot be used with --remove-%s-files\n",
1913                         remove_source_files == 1 ? "source" : "sent");
1914                 return 0;
1915         }
1916         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
1917                 snprintf(err_buf, sizeof err_buf,
1918                         "the batch-file name must be %d characters or less.\n",
1919                         MAX_BATCH_NAME_LEN);
1920                 return 0;
1921         }
1922
1923         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1924                 snprintf(err_buf, sizeof err_buf,
1925                          "the --temp-dir path is WAY too long.\n");
1926                 return 0;
1927         }
1928
1929         if (max_delete < 0 && max_delete != INT_MIN) {
1930                 /* Negative numbers are treated as "no deletions". */
1931                 max_delete = 0;
1932         }
1933
1934         if (compare_dest + copy_dest + link_dest > 1) {
1935                 snprintf(err_buf, sizeof err_buf,
1936                         "You may not mix --compare-dest, --copy-dest, and --link-dest.\n");
1937                 return 0;
1938         }
1939
1940         if (files_from) {
1941                 if (recurse == 1) /* preserve recurse == 2 */
1942                         recurse = 0;
1943                 if (xfer_dirs < 0)
1944                         xfer_dirs = 1;
1945         }
1946
1947         if (argc < 2 && !read_batch && !am_server)
1948                 list_only |= 1;
1949
1950         if (xfer_dirs >= 4) {
1951                 parse_filter_str(&filter_list, "- /*/*", rule_template(0), 0);
1952                 recurse = xfer_dirs = 1;
1953         } else if (recurse)
1954                 xfer_dirs = 1;
1955         else if (xfer_dirs < 0)
1956                 xfer_dirs = list_only ? 1 : 0;
1957
1958         if (relative_paths < 0)
1959                 relative_paths = files_from? 1 : 0;
1960         if (!relative_paths)
1961                 implied_dirs = 0;
1962
1963         if (delete_before + !!delete_during + delete_after > 1) {
1964                 snprintf(err_buf, sizeof err_buf,
1965                         "You may not combine multiple --delete-WHEN options.\n");
1966                 return 0;
1967         }
1968         if (delete_before || delete_during || delete_after)
1969                 delete_mode = 1;
1970         else if (delete_mode || delete_excluded) {
1971                 /* Only choose now between before & during if one is refused. */
1972                 if (refused_delete_before) {
1973                         if (!refused_delete_during)
1974                                 delete_during = 1;
1975                         else {
1976                                 create_refuse_error(refused_delete_before);
1977                                 return 0;
1978                         }
1979                 } else if (refused_delete_during)
1980                         delete_before = 1;
1981                 delete_mode = 1;
1982         }
1983         if (!xfer_dirs && delete_mode) {
1984                 snprintf(err_buf, sizeof err_buf,
1985                         "--delete does not work without --recursive (-r) or --dirs (-d).\n");
1986                 return 0;
1987         }
1988
1989         if (missing_args == 3) /* simplify if both options were specified */
1990                 missing_args = 2;
1991         if (refused_delete && (delete_mode || missing_args == 2)) {
1992                 create_refuse_error(refused_delete);
1993                 return 0;
1994         }
1995
1996         if (remove_source_files) {
1997                 /* We only want to infer this refusal of --remove-source-files
1998                  * via the refusal of "delete", not any of the "delete-FOO"
1999                  * options. */
2000                 if (refused_delete && am_sender) {
2001                         create_refuse_error(refused_delete);
2002                         return 0;
2003                 }
2004                 need_messages_from_generator = 1;
2005         }
2006
2007         if (munge_symlinks && !am_daemon) {
2008                 STRUCT_STAT st;
2009                 char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */
2010                 strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */
2011                 if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) {
2012                         rprintf(FERROR, "Symlink munging is unsafe when a %s directory exists.\n",
2013                                 prefix);
2014                         exit_cleanup(RERR_UNSUPPORTED);
2015                 }
2016         }
2017
2018         if (sanitize_paths) {
2019                 int i;
2020                 for (i = argc; i-- > 0; )
2021                         argv[i] = sanitize_path(NULL, argv[i], "", 0, SP_KEEP_DOT_DIRS);
2022                 if (tmpdir)
2023                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, SP_DEFAULT);
2024                 if (backup_dir)
2025                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, SP_DEFAULT);
2026         }
2027         if (daemon_filter_list.head && !am_sender) {
2028                 filter_rule_list *elp = &daemon_filter_list;
2029                 if (tmpdir) {
2030                         char *dir;
2031                         if (!*tmpdir)
2032                                 goto options_rejected;
2033                         dir = tmpdir + (*tmpdir == '/' ? module_dirlen : 0);
2034                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2035                         if (check_filter(elp, FLOG, dir, 1) < 0)
2036                                 goto options_rejected;
2037                 }
2038                 if (backup_dir) {
2039                         char *dir;
2040                         if (!*backup_dir)
2041                                 goto options_rejected;
2042                         dir = backup_dir + (*backup_dir == '/' ? module_dirlen : 0);
2043                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2044                         if (check_filter(elp, FLOG, dir, 1) < 0)
2045                                 goto options_rejected;
2046                 }
2047         }
2048
2049         if (!backup_suffix)
2050                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
2051         backup_suffix_len = strlen(backup_suffix);
2052         if (strchr(backup_suffix, '/') != NULL) {
2053                 snprintf(err_buf, sizeof err_buf,
2054                         "--suffix cannot contain slashes: %s\n",
2055                         backup_suffix);
2056                 return 0;
2057         }
2058         if (backup_dir) {
2059                 size_t len;
2060                 while (*backup_dir == '.' && backup_dir[1] == '/')
2061                         backup_dir += 2;
2062                 if (*backup_dir == '.' && backup_dir[1] == '\0')
2063                         backup_dir++;
2064                 len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
2065                 if (len > sizeof backup_dir_buf - 128) {
2066                         snprintf(err_buf, sizeof err_buf,
2067                                 "the --backup-dir path is WAY too long.\n");
2068                         return 0;
2069                 }
2070                 backup_dir_len = (int)len;
2071                 if (!backup_dir_len) {
2072                         backup_dir_len = -1;
2073                         backup_dir = NULL;
2074                 } else if (backup_dir_buf[backup_dir_len - 1] != '/') {
2075                         backup_dir_buf[backup_dir_len++] = '/';
2076                         backup_dir_buf[backup_dir_len] = '\0';
2077                 }
2078                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
2079         }
2080         if (backup_dir) {
2081                 /* No need for a suffix or a protect rule. */
2082         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
2083                 snprintf(err_buf, sizeof err_buf,
2084                         "--suffix cannot be empty %s\n", backup_dir_len < 0
2085                         ? "when --backup-dir is the same as the dest dir"
2086                         : "without a --backup-dir");
2087                 return 0;
2088         } else if (make_backups && delete_mode && !delete_excluded && !am_server) {
2089                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
2090                         "P *%s", backup_suffix);
2091                 parse_filter_str(&filter_list, backup_dir_buf, rule_template(0), 0);
2092         }
2093
2094         if (preserve_times) {
2095                 preserve_times = PRESERVE_FILE_TIMES;
2096                 if (!omit_dir_times)
2097                         preserve_times |= PRESERVE_DIR_TIMES;
2098 #ifdef CAN_SET_SYMLINK_TIMES
2099                 if (!omit_link_times)
2100                         preserve_times |= PRESERVE_LINK_TIMES;
2101 #endif
2102         }
2103
2104         if (make_backups && !backup_dir) {
2105                 omit_dir_times = 0; /* Implied, so avoid -O to sender. */
2106                 preserve_times &= ~PRESERVE_DIR_TIMES;
2107         }
2108
2109         if (stdout_format) {
2110                 if (am_server && log_format_has(stdout_format, 'I'))
2111                         stdout_format_has_i = 2;
2112                 else if (log_format_has(stdout_format, 'i'))
2113                         stdout_format_has_i = itemize_changes | 1;
2114                 if (!log_format_has(stdout_format, 'b')
2115                  && !log_format_has(stdout_format, 'c')
2116                  && !log_format_has(stdout_format, 'C'))
2117                         log_before_transfer = !am_server;
2118         } else if (itemize_changes) {
2119                 stdout_format = "%i %n%L";
2120                 stdout_format_has_i = itemize_changes;
2121                 log_before_transfer = !am_server;
2122         }
2123
2124         if (do_progress && !am_server) {
2125                 if (!log_before_transfer && INFO_EQ(NAME, 0))
2126                         parse_output_words(info_words, info_levels, "name", DEFAULT_PRIORITY);
2127                 parse_output_words(info_words, info_levels, "flist2,progress", DEFAULT_PRIORITY);
2128         }
2129
2130         if (dry_run)
2131                 do_xfers = 0;
2132
2133         set_io_timeout(io_timeout);
2134
2135         if (INFO_GTE(NAME, 1) && !stdout_format) {
2136                 stdout_format = "%n%L";
2137                 log_before_transfer = !am_server;
2138         }
2139         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
2140                 stdout_format_has_o_or_i = 1;
2141
2142         if (logfile_name && !am_daemon) {
2143                 if (!logfile_format) {
2144                         logfile_format = "%i %n%L";
2145                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
2146                 } else {
2147                         if (log_format_has(logfile_format, 'i'))
2148                                 logfile_format_has_i = 1;
2149                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
2150                                 logfile_format_has_o_or_i = 1;
2151                 }
2152                 log_init(0);
2153         } else if (!am_daemon)
2154                 logfile_format = NULL;
2155
2156         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
2157                 bwlimit = daemon_bwlimit;
2158         if (bwlimit) {
2159                 bwlimit_writemax = (size_t)bwlimit * 128;
2160                 if (bwlimit_writemax < 512)
2161                         bwlimit_writemax = 512;
2162         }
2163
2164         if (sparse_files && inplace) {
2165                 /* Note: we don't check for this below, because --append is
2166                  * OK with --sparse (as long as redos are handled right). */
2167                 snprintf(err_buf, sizeof err_buf,
2168                          "--sparse cannot be used with --inplace\n");
2169                 return 0;
2170         }
2171
2172         if (append_mode) {
2173                 if (whole_file > 0) {
2174                         snprintf(err_buf, sizeof err_buf,
2175                                  "--append cannot be used with --whole-file\n");
2176                         return 0;
2177                 }
2178                 if (refused_inplace) {
2179                         create_refuse_error(refused_inplace);
2180                         return 0;
2181                 }
2182                 inplace = 1;
2183         }
2184
2185         if (delay_updates && !partial_dir)
2186                 partial_dir = tmp_partialdir;
2187
2188         if (inplace) {
2189 #ifdef HAVE_FTRUNCATE
2190                 if (partial_dir) {
2191                         snprintf(err_buf, sizeof err_buf,
2192                                  "--%s cannot be used with --%s\n",
2193                                  append_mode ? "append" : "inplace",
2194                                  delay_updates ? "delay-updates" : "partial-dir");
2195                         return 0;
2196                 }
2197                 /* --inplace implies --partial for refusal purposes, but we
2198                  * clear the keep_partial flag for internal logic purposes. */
2199                 if (refused_partial) {
2200                         create_refuse_error(refused_partial);
2201                         return 0;
2202                 }
2203                 keep_partial = 0;
2204 #else
2205                 snprintf(err_buf, sizeof err_buf,
2206                          "--%s is not supported on this %s\n",
2207                          append_mode ? "append" : "inplace",
2208                          am_server ? "server" : "client");
2209                 return 0;
2210 #endif
2211         } else {
2212                 if (keep_partial && !partial_dir && !am_server) {
2213                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
2214                                 partial_dir = strdup(arg);
2215                 }
2216                 if (partial_dir) {
2217                         if (*partial_dir)
2218                                 clean_fname(partial_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2219                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
2220                                 partial_dir = NULL;
2221                         if (!partial_dir && refused_partial) {
2222                                 create_refuse_error(refused_partial);
2223                                 return 0;
2224                         }
2225                         keep_partial = 1;
2226                 }
2227         }
2228
2229         if (files_from) {
2230                 char *h, *p;
2231                 int q;
2232                 if (argc > 2 || (!am_daemon && !am_server && argc == 1)) {
2233                         usage(FERROR);
2234                         exit_cleanup(RERR_SYNTAX);
2235                 }
2236                 if (strcmp(files_from, "-") == 0) {
2237                         filesfrom_fd = 0;
2238                         if (am_server)
2239                                 filesfrom_host = ""; /* reading from socket */
2240                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
2241                         if (am_server) {
2242                                 snprintf(err_buf, sizeof err_buf,
2243                                         "The --files-from sent to the server cannot specify a host.\n");
2244                                 return 0;
2245                         }
2246                         files_from = p;
2247                         filesfrom_host = h;
2248                         if (strcmp(files_from, "-") == 0) {
2249                                 snprintf(err_buf, sizeof err_buf,
2250                                         "Invalid --files-from remote filename\n");
2251                                 return 0;
2252                         }
2253                 } else {
2254                         if (sanitize_paths)
2255                                 files_from = sanitize_path(NULL, files_from, NULL, 0, SP_DEFAULT);
2256                         if (daemon_filter_list.head) {
2257                                 char *dir;
2258                                 if (!*files_from)
2259                                         goto options_rejected;
2260                                 dir = files_from + (*files_from == '/' ? module_dirlen : 0);
2261                                 clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2262                                 if (check_filter(&daemon_filter_list, FLOG, dir, 0) < 0)
2263                                         goto options_rejected;
2264                         }
2265                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
2266                         if (filesfrom_fd < 0) {
2267                                 snprintf(err_buf, sizeof err_buf,
2268                                         "failed to open files-from file %s: %s\n",
2269                                         files_from, strerror(errno));
2270                                 return 0;
2271                         }
2272                 }
2273         }
2274
2275         am_starting_up = 0;
2276
2277         return 1;
2278
2279   options_rejected:
2280         snprintf(err_buf, sizeof err_buf,
2281                 "Your options have been rejected by the server.\n");
2282         return 0;
2283 }
2284
2285
2286 /**
2287  * Construct a filtered list of options to pass through from the
2288  * client to the server.
2289  *
2290  * This involves setting options that will tell the server how to
2291  * behave, and also filtering out options that are processed only
2292  * locally.
2293  **/
2294 void server_options(char **args, int *argc_p)
2295 {
2296         static char argstr[64];
2297         int ac = *argc_p;
2298         uchar where;
2299         char *arg;
2300         int i, x;
2301
2302         /* This should always remain first on the server's command-line. */
2303         args[ac++] = "--server";
2304
2305         if (daemon_over_rsh > 0) {
2306                 args[ac++] = "--daemon";
2307                 *argc_p = ac;
2308                 /* if we're passing --daemon, we're done */
2309                 return;
2310         }
2311
2312         if (!am_sender)
2313                 args[ac++] = "--sender";
2314
2315         x = 1;
2316         argstr[0] = '-';
2317
2318         if (protect_args)
2319                 argstr[x++] = 's';
2320
2321         for (i = 0; i < verbose; i++)
2322                 argstr[x++] = 'v';
2323
2324         /* the -q option is intentionally left out */
2325         if (make_backups)
2326                 argstr[x++] = 'b';
2327         if (update_only)
2328                 argstr[x++] = 'u';
2329         if (!do_xfers) /* Note: NOT "dry_run"! */
2330                 argstr[x++] = 'n';
2331         if (preserve_links)
2332                 argstr[x++] = 'l';
2333         if ((xfer_dirs >= 2 && xfer_dirs < 4)
2334          || (xfer_dirs && !recurse && (list_only || (delete_mode && am_sender))))
2335                 argstr[x++] = 'd';
2336         if (am_sender) {
2337                 if (keep_dirlinks)
2338                         argstr[x++] = 'K';
2339                 if (prune_empty_dirs)
2340                         argstr[x++] = 'm';
2341                 if (omit_dir_times)
2342                         argstr[x++] = 'O';
2343                 if (omit_link_times)
2344                         argstr[x++] = 'J';
2345         } else {
2346                 if (copy_links)
2347                         argstr[x++] = 'L';
2348                 if (copy_dirlinks)
2349                         argstr[x++] = 'k';
2350         }
2351
2352         if (whole_file > 0)
2353                 argstr[x++] = 'W';
2354         /* We don't need to send --no-whole-file, because it's the
2355          * default for remote transfers, and in any case old versions
2356          * of rsync will not understand it. */
2357
2358         if (preserve_hard_links) {
2359                 argstr[x++] = 'H';
2360                 if (preserve_hard_links > 1)
2361                         argstr[x++] = 'H';
2362         }
2363         if (preserve_uid)
2364                 argstr[x++] = 'o';
2365         if (preserve_gid)
2366                 argstr[x++] = 'g';
2367         if (preserve_devices) /* ignore preserve_specials here */
2368                 argstr[x++] = 'D';
2369         if (preserve_times)
2370                 argstr[x++] = 't';
2371         if (preserve_perms)
2372                 argstr[x++] = 'p';
2373         else if (preserve_executability && am_sender)
2374                 argstr[x++] = 'E';
2375 #ifdef SUPPORT_ACLS
2376         if (preserve_acls)
2377                 argstr[x++] = 'A';
2378 #endif
2379 #ifdef SUPPORT_XATTRS
2380         if (preserve_xattrs) {
2381                 argstr[x++] = 'X';
2382                 if (preserve_xattrs > 1)
2383                         argstr[x++] = 'X';
2384         }
2385 #endif
2386         if (recurse)
2387                 argstr[x++] = 'r';
2388         if (always_checksum)
2389                 argstr[x++] = 'c';
2390         if (cvs_exclude)
2391                 argstr[x++] = 'C';
2392         if (ignore_times)
2393                 argstr[x++] = 'I';
2394         if (relative_paths)
2395                 argstr[x++] = 'R';
2396         if (one_file_system) {
2397                 argstr[x++] = 'x';
2398                 if (one_file_system > 1)
2399                         argstr[x++] = 'x';
2400         }
2401         if (sparse_files)
2402                 argstr[x++] = 'S';
2403         if (do_compression)
2404                 argstr[x++] = 'z';
2405
2406         set_allow_inc_recurse();
2407
2408         /* Checking the pre-negotiated value allows --protocol=29 override. */
2409         if (protocol_version >= 30) {
2410                 /* We make use of the -e option to let the server know about
2411                  * any pre-release protocol version && some behavior flags. */
2412                 argstr[x++] = 'e';
2413 #if SUBPROTOCOL_VERSION != 0
2414                 if (protocol_version == PROTOCOL_VERSION) {
2415                         x += snprintf(argstr+x, sizeof argstr - x,
2416                                       "%d.%d",
2417                                       PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
2418                 } else
2419 #endif
2420                         argstr[x++] = '.';
2421                 if (allow_inc_recurse)
2422                         argstr[x++] = 'i';
2423 #ifdef CAN_SET_SYMLINK_TIMES
2424                 argstr[x++] = 'L';
2425 #endif
2426 #ifdef ICONV_OPTION
2427                 argstr[x++] = 's';
2428 #endif
2429         }
2430
2431         if (x >= (int)sizeof argstr) { /* Not possible... */
2432                 rprintf(FERROR, "argstr overflow in server_options().\n");
2433                 exit_cleanup(RERR_MALLOC);
2434         }
2435
2436         argstr[x] = '\0';
2437
2438         if (x > 1)
2439                 args[ac++] = argstr;
2440
2441 #ifdef ICONV_OPTION
2442         if (iconv_opt) {
2443                 char *set = strchr(iconv_opt, ',');
2444                 if (set)
2445                         set++;
2446                 else
2447                         set = iconv_opt;
2448                 if (asprintf(&arg, "--iconv=%s", set) < 0)
2449                         goto oom;
2450                 args[ac++] = arg;
2451         }
2452 #endif
2453
2454         if (protect_args && !local_server) /* unprotected args stop here */
2455                 args[ac++] = NULL;
2456
2457         if (list_only > 1)
2458                 args[ac++] = "--list-only";
2459
2460         /* This makes sure that the remote rsync can handle deleting with -d
2461          * sans -r because the --no-r option was added at the same time. */
2462         if (xfer_dirs && !recurse && delete_mode && am_sender)
2463                 args[ac++] = "--no-r";
2464
2465         if (do_compression && def_compress_level != Z_DEFAULT_COMPRESSION) {
2466                 if (asprintf(&arg, "--compress-level=%d", def_compress_level) < 0)
2467                         goto oom;
2468                 args[ac++] = arg;
2469         }
2470
2471         if (preserve_devices) {
2472                 /* Note: sending "--devices" would not be backward-compatible. */
2473                 if (!preserve_specials)
2474                         args[ac++] = "--no-specials"; /* -D is already set. */
2475         } else if (preserve_specials)
2476                 args[ac++] = "--specials";
2477
2478         /* The server side doesn't use our log-format, but in certain
2479          * circumstances they need to know a little about the option. */
2480         if (stdout_format && am_sender) {
2481                 /* Use --log-format, not --out-format, for compatibility. */
2482                 if (stdout_format_has_i > 1)
2483                         args[ac++] = "--log-format=%i%I";
2484                 else if (stdout_format_has_i)
2485                         args[ac++] = "--log-format=%i";
2486                 else if (stdout_format_has_o_or_i)
2487                         args[ac++] = "--log-format=%o";
2488                 else if (!verbose)
2489                         args[ac++] = "--log-format=X";
2490         }
2491
2492         if (block_size) {
2493                 if (asprintf(&arg, "-B%lu", block_size) < 0)
2494                         goto oom;
2495                 args[ac++] = arg;
2496         }
2497
2498         if (io_timeout) {
2499                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
2500                         goto oom;
2501                 args[ac++] = arg;
2502         }
2503
2504         if (bwlimit) {
2505                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
2506                         goto oom;
2507                 args[ac++] = arg;
2508         }
2509
2510         if (backup_dir) {
2511                 args[ac++] = "--backup-dir";
2512                 args[ac++] = backup_dir;
2513         }
2514
2515         /* Only send --suffix if it specifies a non-default value. */
2516         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
2517                 /* We use the following syntax to avoid weirdness with '~'. */
2518                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
2519                         goto oom;
2520                 args[ac++] = arg;
2521         }
2522
2523         if (am_sender) {
2524                 if (max_delete > 0) {
2525                         if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
2526                                 goto oom;
2527                         args[ac++] = arg;
2528                 } else if (max_delete == 0)
2529                         args[ac++] = "--max-delete=-1";
2530                 if (min_size) {
2531                         args[ac++] = "--min-size";
2532                         args[ac++] = min_size_arg;
2533                 }
2534                 if (max_size) {
2535                         args[ac++] = "--max-size";
2536                         args[ac++] = max_size_arg;
2537                 }
2538                 if (delete_before)
2539                         args[ac++] = "--delete-before";
2540                 else if (delete_during == 2)
2541                         args[ac++] = "--delete-delay";
2542                 else if (delete_during)
2543                         args[ac++] = "--delete-during";
2544                 else if (delete_after)
2545                         args[ac++] = "--delete-after";
2546                 else if (delete_mode && !delete_excluded)
2547                         args[ac++] = "--delete";
2548                 if (delete_excluded)
2549                         args[ac++] = "--delete-excluded";
2550                 if (force_delete)
2551                         args[ac++] = "--force";
2552                 if (write_batch < 0)
2553                         args[ac++] = "--only-write-batch=X";
2554                 if (am_root > 1)
2555                         args[ac++] = "--super";
2556                 if (size_only)
2557                         args[ac++] = "--size-only";
2558                 if (do_stats)
2559                         args[ac++] = "--stats";
2560         } else {
2561                 if (skip_compress) {
2562                         if (asprintf(&arg, "--skip-compress=%s", skip_compress) < 0)
2563                                 goto oom;
2564                         args[ac++] = arg;
2565                 }
2566         }
2567
2568         /* --delete-missing-args needs the cooperation of both sides, but
2569          * the sender can handle --ignore-missing-args by itself. */
2570         if (missing_args == 2)
2571                 args[ac++] = "--delete-missing-args";
2572         else if (missing_args == 1 && !am_sender)
2573                 args[ac++] = "--ignore-missing-args";
2574
2575         if (modify_window_set) {
2576                 if (asprintf(&arg, "--modify-window=%d", modify_window) < 0)
2577                         goto oom;
2578                 args[ac++] = arg;
2579         }
2580
2581         if (checksum_seed) {
2582                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
2583                         goto oom;
2584                 args[ac++] = arg;
2585         }
2586
2587         if (partial_dir && am_sender) {
2588                 if (partial_dir != tmp_partialdir) {
2589                         args[ac++] = "--partial-dir";
2590                         args[ac++] = partial_dir;
2591                 }
2592                 if (delay_updates)
2593                         args[ac++] = "--delay-updates";
2594         } else if (keep_partial && am_sender)
2595                 args[ac++] = "--partial";
2596
2597         if (ignore_errors)
2598                 args[ac++] = "--ignore-errors";
2599
2600         if (copy_unsafe_links)
2601                 args[ac++] = "--copy-unsafe-links";
2602
2603         if (safe_symlinks)
2604                 args[ac++] = "--safe-links";
2605
2606         if (numeric_ids)
2607                 args[ac++] = "--numeric-ids";
2608
2609         if (use_qsort)
2610                 args[ac++] = "--use-qsort";
2611
2612         if (am_sender) {
2613                 if (usermap) {
2614                         if (asprintf(&arg, "--usermap=%s", usermap) < 0)
2615                                 goto oom;
2616                         args[ac++] = arg;
2617                 }
2618
2619                 if (groupmap) {
2620                         if (asprintf(&arg, "--groupmap=%s", groupmap) < 0)
2621                                 goto oom;
2622                         args[ac++] = arg;
2623                 }
2624
2625                 if (ignore_existing)
2626                         args[ac++] = "--ignore-existing";
2627
2628                 /* Backward compatibility: send --existing, not --ignore-non-existing. */
2629                 if (ignore_non_existing)
2630                         args[ac++] = "--existing";
2631
2632                 if (tmpdir) {
2633                         args[ac++] = "--temp-dir";
2634                         args[ac++] = tmpdir;
2635                 }
2636
2637                 if (basis_dir[0]) {
2638                         /* the server only needs this option if it is not the sender,
2639                          *   and it may be an older version that doesn't know this
2640                          *   option, so don't send it if client is the sender.
2641                          */
2642                         for (i = 0; i < basis_dir_cnt; i++) {
2643                                 args[ac++] = dest_option;
2644                                 args[ac++] = basis_dir[i];
2645                         }
2646                 }
2647         }
2648
2649         /* What flags do we need to send to the other side? */
2650         where = (am_server ? W_CLI : W_SRV) | (am_sender ? W_REC : W_SND);
2651         arg = make_output_option(info_words, info_levels, where);
2652         if (arg)
2653                 args[ac++] = arg;
2654
2655         arg = make_output_option(debug_words, debug_levels, where);
2656         if (arg)
2657                 args[ac++] = arg;
2658
2659         if (append_mode) {
2660                 if (append_mode > 1)
2661                         args[ac++] = "--append";
2662                 args[ac++] = "--append";
2663         } else if (inplace)
2664                 args[ac++] = "--inplace";
2665
2666         if (files_from && (!am_sender || filesfrom_host)) {
2667                 if (filesfrom_host) {
2668                         args[ac++] = "--files-from";
2669                         args[ac++] = files_from;
2670                         if (eol_nulls)
2671                                 args[ac++] = "--from0";
2672                 } else {
2673                         args[ac++] = "--files-from=-";
2674                         args[ac++] = "--from0";
2675                 }
2676                 if (!relative_paths)
2677                         args[ac++] = "--no-relative";
2678         }
2679         /* It's OK that this checks the upper-bound of the protocol_version. */
2680         if (relative_paths && !implied_dirs && (!am_sender || protocol_version >= 30))
2681                 args[ac++] = "--no-implied-dirs";
2682
2683         if (fuzzy_basis && am_sender)
2684                 args[ac++] = "--fuzzy";
2685
2686         if (remove_source_files == 1)
2687                 args[ac++] = "--remove-source-files";
2688         else if (remove_source_files)
2689                 args[ac++] = "--remove-sent-files";
2690
2691         if (preallocate_files && am_sender)
2692                 args[ac++] = "--preallocate";
2693
2694         if (ac > MAX_SERVER_ARGS) { /* Not possible... */
2695                 rprintf(FERROR, "argc overflow in server_options().\n");
2696                 exit_cleanup(RERR_MALLOC);
2697         }
2698
2699         if (remote_option_cnt) {
2700                 int j;
2701                 if (ac + remote_option_cnt > MAX_SERVER_ARGS) {
2702                         rprintf(FERROR, "too many remote options specified.\n");
2703                         exit_cleanup(RERR_SYNTAX);
2704                 }
2705                 for (j = 1; j <= remote_option_cnt; j++)
2706                         args[ac++] = (char*)remote_options[j];
2707         }
2708
2709         *argc_p = ac;
2710         return;
2711
2712     oom:
2713         out_of_memory("server_options");
2714 }
2715
2716 /* If str points to a valid hostspec, return allocated memory containing the
2717  * [USER@]HOST part of the string, and set the path_start_ptr to the part of
2718  * the string after the host part.  Otherwise, return NULL.  If port_ptr is
2719  * non-NULL, we must be parsing an rsync:// URL hostname, and we will set
2720  * *port_ptr if a port number is found.  Note that IPv6 IPs will have their
2721  * (required for parsing) [ and ] chars elided from the returned string. */
2722 static char *parse_hostspec(char *str, char **path_start_ptr, int *port_ptr)
2723 {
2724         char *s, *host_start = str;
2725         int hostlen = 0, userlen = 0;
2726         char *ret;
2727
2728         for (s = str; ; s++) {
2729                 if (!*s) {
2730                         /* It is only OK if we run out of string with rsync:// */
2731                         if (!port_ptr)
2732                                 return NULL;
2733                         if (!hostlen)
2734                                 hostlen = s - host_start;
2735                         break;
2736                 }
2737                 if (*s == ':' || *s == '/') {
2738                         if (!hostlen)
2739                                 hostlen = s - host_start;
2740                         if (*s++ == '/') {
2741                                 if (!port_ptr)
2742                                         return NULL;
2743                         } else if (port_ptr) {
2744                                 *port_ptr = atoi(s);
2745                                 while (isDigit(s)) s++;
2746                                 if (*s && *s++ != '/')
2747                                         return NULL;
2748                         }
2749                         break;
2750                 }
2751                 if (*s == '@') {
2752                         userlen = s - str + 1;
2753                         host_start = s + 1;
2754                 } else if (*s == '[') {
2755                         if (s != host_start++)
2756                                 return NULL;
2757                         while (*s && *s != ']' && *s != '/') s++; /*SHARED ITERATOR*/
2758                         hostlen = s - host_start;
2759                         if (*s != ']' || (s[1] && s[1] != '/' && s[1] != ':') || !hostlen)
2760                                 return NULL;
2761                 }
2762         }
2763
2764         *path_start_ptr = s;
2765         ret = new_array(char, userlen + hostlen + 1);
2766         if (userlen)
2767                 strlcpy(ret, str, userlen + 1);
2768         strlcpy(ret + userlen, host_start, hostlen + 1);
2769         return ret;
2770 }
2771
2772 /* Look for a HOST specfication of the form "HOST:PATH", "HOST::PATH", or
2773  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
2774  * memory with the HOST.  If a daemon-accessing spec was specified, the value
2775  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
2776  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
2777  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
2778  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
2779 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
2780 {
2781         char *path;
2782
2783         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
2784                 *host_ptr = parse_hostspec(s + strlen(URL_PREFIX), &path, port_ptr);
2785                 if (*host_ptr) {
2786                         if (!*port_ptr)
2787                                 *port_ptr = RSYNC_PORT;
2788                         return path;
2789                 }
2790         }
2791
2792         *host_ptr = parse_hostspec(s, &path, NULL);
2793         if (!*host_ptr)
2794                 return NULL;
2795
2796         if (*path == ':') {
2797                 if (port_ptr && !*port_ptr)
2798                         *port_ptr = RSYNC_PORT;
2799                 return path + 1;
2800         }
2801         if (port_ptr)
2802                 *port_ptr = 0;
2803
2804         return path;
2805 }