308443bdab3bad80a7d7a4d980c3f7aa098045fd
[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) 2002-2015 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 #define NOT_SPECIFIED (-42)
36
37 int make_backups = 0;
38
39 /**
40  * If 1, send the whole file as literal data rather than trying to
41  * create an incremental diff.
42  *
43  * If -1, then look at whether we're local or remote and go by that.
44  *
45  * @sa disable_deltas_p()
46  **/
47 int whole_file = -1;
48
49 int append_mode = 0;
50 int keep_dirlinks = 0;
51 int copy_dirlinks = 0;
52 int copy_links = 0;
53 int preserve_links = 0;
54 int preserve_hard_links = 0;
55 int preserve_acls = 0;
56 int preserve_xattrs = 0;
57 int preserve_perms = 0;
58 int preserve_executability = 0;
59 int preserve_devices = 0;
60 int preserve_specials = 0;
61 int preserve_uid = 0;
62 int preserve_gid = 0;
63 int preserve_times = 0;
64 int update_only = 0;
65 int cvs_exclude = 0;
66 int dry_run = 0;
67 int do_xfers = 1;
68 int ignore_times = 0;
69 int delete_mode = 0;
70 int delete_during = 0;
71 int delete_before = 0;
72 int delete_after = 0;
73 int delete_excluded = 0;
74 int remove_source_files = 0;
75 int one_file_system = 0;
76 int protocol_version = PROTOCOL_VERSION;
77 int sparse_files = 0;
78 int preallocate_files = 0;
79 int do_compression = 0;
80 int def_compress_level = NOT_SPECIFIED;
81 int am_root = 0; /* 0 = normal, 1 = root, 2 = --super, -1 = --fake-super */
82 int am_server = 0;
83 int am_sender = 0;
84 int am_starting_up = 1;
85 int relative_paths = -1;
86 int implied_dirs = 1;
87 int missing_args = 0; /* 0 = FERROR_XFER, 1 = ignore, 2 = delete */
88 int numeric_ids = 0;
89 int msgs2stderr = 0;
90 int allow_8bit_chars = 0;
91 int force_delete = 0;
92 int io_timeout = 0;
93 int prune_empty_dirs = 0;
94 int use_qsort = 0;
95 char *files_from = NULL;
96 int filesfrom_fd = -1;
97 char *filesfrom_host = NULL;
98 int eol_nulls = 0;
99 int protect_args = -1;
100 int human_readable = 1;
101 int recurse = 0;
102 int allow_inc_recurse = 1;
103 int xfer_dirs = -1;
104 int am_daemon = 0;
105 int connect_timeout = 0;
106 int keep_partial = 0;
107 int safe_symlinks = 0;
108 int copy_unsafe_links = 0;
109 int munge_symlinks = 0;
110 int size_only = 0;
111 int daemon_bwlimit = 0;
112 int bwlimit = 0;
113 int fuzzy_basis = 0;
114 size_t bwlimit_writemax = 0;
115 int ignore_existing = 0;
116 int ignore_non_existing = 0;
117 int need_messages_from_generator = 0;
118 int max_delete = INT_MIN;
119 OFF_T max_size = -1;
120 OFF_T min_size = -1;
121 int ignore_errors = 0;
122 int modify_window = 0;
123 int blocking_io = -1;
124 int checksum_seed = 0;
125 int inplace = 0;
126 int delay_updates = 0;
127 long block_size = 0; /* "long" because popt can't set an int32. */
128 char *skip_compress = NULL;
129 item_list dparam_list = EMPTY_ITEM_LIST;
130
131 /** Network address family. **/
132 int default_af_hint
133 #ifdef INET6
134         = 0;            /* Any protocol */
135 #else
136         = AF_INET;      /* Must use IPv4 */
137 # ifdef AF_INET6
138 #  undef AF_INET6
139 # endif
140 # define AF_INET6 AF_INET /* make -6 option a no-op */
141 #endif
142
143 /** Do not go into the background when run as --daemon.  Good
144  * for debugging and required for running as a service on W32,
145  * or under Unix process-monitors. **/
146 int no_detach
147 #if defined _WIN32 || defined __WIN32__
148         = 1;
149 #else
150         = 0;
151 #endif
152
153 int write_batch = 0;
154 int read_batch = 0;
155 int backup_dir_len = 0;
156 int backup_suffix_len;
157 unsigned int backup_dir_remainder;
158
159 char *backup_suffix = NULL;
160 char *tmpdir = NULL;
161 char *partial_dir = NULL;
162 char *basis_dir[MAX_BASIS_DIRS+1];
163 char *config_file = NULL;
164 char *shell_cmd = NULL;
165 char *logfile_name = NULL;
166 char *logfile_format = NULL;
167 char *stdout_format = NULL;
168 char *password_file = NULL;
169 char *rsync_path = RSYNC_PATH;
170 char *backup_dir = NULL;
171 char backup_dir_buf[MAXPATHLEN];
172 char *sockopts = NULL;
173 char *usermap = NULL;
174 char *groupmap = NULL;
175 int rsync_port = 0;
176 int compare_dest = 0;
177 int copy_dest = 0;
178 int link_dest = 0;
179 int basis_dir_cnt = 0;
180 char *dest_option = NULL;
181
182 static int remote_option_alloc = 0;
183 int remote_option_cnt = 0;
184 const char **remote_options = NULL;
185 const char *checksum_choice = NULL;
186
187 int quiet = 0;
188 int output_motd = 1;
189 int log_before_transfer = 0;
190 int stdout_format_has_i = 0;
191 int stdout_format_has_o_or_i = 0;
192 int logfile_format_has_i = 0;
193 int logfile_format_has_o_or_i = 0;
194 int always_checksum = 0;
195 int list_only = 0;
196
197 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
198 char *batch_name = NULL;
199
200 int need_unsorted_flist = 0;
201 #ifdef ICONV_OPTION
202 char *iconv_opt = ICONV_OPTION;
203 #endif
204
205 struct chmod_mode_struct *chmod_modes = NULL;
206
207 static const char *debug_verbosity[] = {
208         /*0*/ NULL,
209         /*1*/ NULL,
210         /*2*/ "BIND,CMD,CONNECT,DEL,DELTASUM,DUP,FILTER,FLIST,ICONV",
211         /*3*/ "ACL,BACKUP,CONNECT2,DELTASUM2,DEL2,EXIT,FILTER2,FLIST2,FUZZY,GENR,OWN,RECV,SEND,TIME",
212         /*4*/ "CMD2,DELTASUM3,DEL3,EXIT2,FLIST3,ICONV2,OWN2,PROTO,TIME2",
213         /*5*/ "CHDIR,DELTASUM4,FLIST4,FUZZY2,HASH,HLINK",
214 };
215
216 #define MAX_VERBOSITY ((int)(sizeof debug_verbosity / sizeof debug_verbosity[0]) - 1)
217
218 static const char *info_verbosity[1+MAX_VERBOSITY] = {
219         /*0*/ NULL,
220         /*1*/ "COPY,DEL,FLIST,MISC,NAME,STATS,SYMSAFE",
221         /*2*/ "BACKUP,MISC2,MOUNT,NAME2,REMOVE,SKIP",
222 };
223
224 #define MAX_OUT_LEVEL 4 /* The largest N allowed for any flagN word. */
225
226 short info_levels[COUNT_INFO], debug_levels[COUNT_DEBUG];
227
228 #define DEFAULT_PRIORITY 0      /* Default/implied/--verbose set values. */
229 #define HELP_PRIORITY 1         /* The help output uses this level. */
230 #define USER_PRIORITY 2         /* User-specified via --info or --debug */
231 #define LIMIT_PRIORITY 3        /* Overriding priority when limiting values. */
232
233 #define W_CLI (1<<0)    /* client side */
234 #define W_SRV (1<<1)    /* server side */
235 #define W_SND (1<<2)    /* sending side */
236 #define W_REC (1<<3)    /* receiving side */
237
238 struct output_struct {
239         char *name;     /* The name of the info/debug flag. */
240         char *help;     /* The description of the info/debug flag. */
241         uchar namelen;  /* The length of the name string. */
242         uchar flag;     /* The flag's value, for consistency check. */
243         uchar where;    /* Bits indicating where the flag is used. */
244         uchar priority; /* See *_PRIORITY defines. */
245 };
246
247 #define INFO_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, INFO_##flag, where, 0 }
248
249 static struct output_struct info_words[COUNT_INFO+1] = {
250         INFO_WORD(BACKUP, W_REC, "Mention files backed up"),
251         INFO_WORD(COPY, W_REC, "Mention files copied locally on the receiving side"),
252         INFO_WORD(DEL, W_REC, "Mention deletions on the receiving side"),
253         INFO_WORD(FLIST, W_CLI, "Mention file-list receiving/sending (levels 1-2)"),
254         INFO_WORD(MISC, W_SND|W_REC, "Mention miscellaneous information (levels 1-2)"),
255         INFO_WORD(MOUNT, W_SND|W_REC, "Mention mounts that were found or skipped"),
256         INFO_WORD(NAME, W_SND|W_REC, "Mention 1) updated file/dir names, 2) unchanged names"),
257         INFO_WORD(PROGRESS, W_CLI, "Mention 1) per-file progress or 2) total transfer progress"),
258         INFO_WORD(REMOVE, W_SND, "Mention files removed on the sending side"),
259         INFO_WORD(SKIP, W_REC, "Mention files that are skipped due to options used"),
260         INFO_WORD(STATS, W_CLI|W_SRV, "Mention statistics at end of run (levels 1-3)"),
261         INFO_WORD(SYMSAFE, W_SND|W_REC, "Mention symlinks that are unsafe"),
262         { NULL, "--info", 0, 0, 0, 0 }
263 };
264
265 #define DEBUG_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, DEBUG_##flag, where, 0 }
266
267 static struct output_struct debug_words[COUNT_DEBUG+1] = {
268         DEBUG_WORD(ACL, W_SND|W_REC, "Debug extra ACL info"),
269         DEBUG_WORD(BACKUP, W_REC, "Debug backup actions (levels 1-2)"),
270         DEBUG_WORD(BIND, W_CLI, "Debug socket bind actions"),
271         DEBUG_WORD(CHDIR, W_CLI|W_SRV, "Debug when the current directory changes"),
272         DEBUG_WORD(CONNECT, W_CLI, "Debug connection events (levels 1-2)"),
273         DEBUG_WORD(CMD, W_CLI, "Debug commands+options that are issued (levels 1-2)"),
274         DEBUG_WORD(DEL, W_REC, "Debug delete actions (levels 1-3)"),
275         DEBUG_WORD(DELTASUM, W_SND|W_REC, "Debug delta-transfer checksumming (levels 1-4)"),
276         DEBUG_WORD(DUP, W_REC, "Debug weeding of duplicate names"),
277         DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-3)"),
278         DEBUG_WORD(FILTER, W_SND|W_REC, "Debug filter actions (levels 1-2)"),
279         DEBUG_WORD(FLIST, W_SND|W_REC, "Debug file-list operations (levels 1-4)"),
280         DEBUG_WORD(FUZZY, W_REC, "Debug fuzzy scoring (levels 1-2)"),
281         DEBUG_WORD(GENR, W_REC, "Debug generator functions"),
282         DEBUG_WORD(HASH, W_SND|W_REC, "Debug hashtable code"),
283         DEBUG_WORD(HLINK, W_SND|W_REC, "Debug hard-link actions (levels 1-3)"),
284         DEBUG_WORD(ICONV, W_CLI|W_SRV, "Debug iconv character conversions (levels 1-2)"),
285         DEBUG_WORD(IO, W_CLI|W_SRV, "Debug I/O routines (levels 1-4)"),
286         DEBUG_WORD(OWN, W_REC, "Debug ownership changes in users & groups (levels 1-2)"),
287         DEBUG_WORD(PROTO, W_CLI|W_SRV, "Debug protocol information"),
288         DEBUG_WORD(RECV, W_REC, "Debug receiver functions"),
289         DEBUG_WORD(SEND, W_SND, "Debug sender functions"),
290         DEBUG_WORD(TIME, W_REC, "Debug setting of modified times (levels 1-2)"),
291         { NULL, "--debug", 0, 0, 0, 0 }
292 };
293
294 static int verbose = 0;
295 static int do_stats = 0;
296 static int do_progress = 0;
297 static int daemon_opt;   /* sets am_daemon after option error-reporting */
298 static int omit_dir_times = 0;
299 static int omit_link_times = 0;
300 static int F_option_cnt = 0;
301 static int modify_window_set;
302 static int itemize_changes = 0;
303 static int refused_delete, refused_archive_part, refused_compress;
304 static int refused_partial, refused_progress, refused_delete_before;
305 static int refused_delete_during;
306 static int refused_inplace, refused_no_iconv;
307 static BOOL usermap_via_chown, groupmap_via_chown;
308 #ifdef HAVE_SETVBUF
309 static char *outbuf_mode;
310 #endif
311 static char *bwlimit_arg, *max_size_arg, *min_size_arg;
312 static char tmp_partialdir[] = ".~tmp~";
313
314 /** Local address to bind.  As a character string because it's
315  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
316  * address, or a hostname. **/
317 char *bind_address;
318
319 static void output_item_help(struct output_struct *words);
320
321 /* This constructs a string that represents all the options set for either
322  * the --info or --debug setting, skipping any implied options (by -v, etc.).
323  * This is used both when conveying the user's options to the server, and
324  * when the help output wants to tell the user what options are implied. */
325 static char *make_output_option(struct output_struct *words, short *levels, uchar where)
326 {
327         char *str = words == info_words ? "--info=" : "--debug=";
328         int j, counts[MAX_OUT_LEVEL+1], pos, skipped = 0, len = 0, max = 0, lev = 0;
329         int word_count = words == info_words ? COUNT_INFO : COUNT_DEBUG;
330         char *buf;
331
332         memset(counts, 0, sizeof counts);
333
334         for (j = 0; words[j].name; j++) {
335                 if (words[j].flag != j) {
336                         rprintf(FERROR, "rsync: internal error on %s%s: %d != %d\n",
337                                 words == info_words ? "INFO_" : "DEBUG_",
338                                 words[j].name, words[j].flag, j);
339                         exit_cleanup(RERR_UNSUPPORTED);
340                 }
341                 if (!(words[j].where & where))
342                         continue;
343                 if (words[j].priority == DEFAULT_PRIORITY) {
344                         /* Implied items don't need to be mentioned. */
345                         skipped++;
346                         continue;
347                 }
348                 len += len ? 1 : strlen(str);
349                 len += strlen(words[j].name);
350                 len += levels[j] == 1 ? 0 : 1;
351
352                 if (words[j].priority == HELP_PRIORITY)
353                         continue; /* no abbreviating for help */
354
355                 assert(levels[j] <= MAX_OUT_LEVEL);
356                 if (++counts[levels[j]] > max) {
357                         /* Determine which level has the most items. */
358                         lev = levels[j];
359                         max = counts[lev];
360                 }
361         }
362
363         /* Sanity check the COUNT_* define against the length of the table. */
364         if (j != word_count) {
365                 rprintf(FERROR, "rsync: internal error: %s is wrong! (%d != %d)\n",
366                         words == info_words ? "COUNT_INFO" : "COUNT_DEBUG",
367                         j, word_count);
368                 exit_cleanup(RERR_UNSUPPORTED);
369         }
370
371         if (!len)
372                 return NULL;
373
374         len++;
375         if (!(buf = new_array(char, len)))
376                 out_of_memory("make_output_option");
377         pos = 0;
378
379         if (skipped || max < 5)
380                 lev = -1;
381         else {
382                 if (lev == 0)
383                         pos += snprintf(buf, len, "%sNONE", str);
384                 else if (lev == 1)
385                         pos += snprintf(buf, len, "%sALL", str);
386                 else
387                         pos += snprintf(buf, len, "%sALL%d", str, lev);
388         }
389
390         for (j = 0; words[j].name && pos < len; j++) {
391                 if (words[j].priority == DEFAULT_PRIORITY || levels[j] == lev || !(words[j].where & where))
392                         continue;
393                 if (pos)
394                         buf[pos++] = ',';
395                 else
396                         pos += strlcpy(buf+pos, str, len-pos);
397                 if (pos < len)
398                         pos += strlcpy(buf+pos, words[j].name, len-pos);
399                 /* Level 1 is implied by the name alone. */
400                 if (levels[j] != 1 && pos < len)
401                         buf[pos++] = '0' + levels[j];
402         }
403
404         buf[pos] = '\0';
405
406         return buf;
407 }
408
409 static void parse_output_words(struct output_struct *words, short *levels,
410                                const char *str, uchar priority)
411 {
412         const char *s;
413         int j, len, lev;
414
415         for ( ; str; str = s) {
416                 if ((s = strchr(str, ',')) != NULL)
417                         len = s++ - str;
418                 else
419                         len = strlen(str);
420                 if (!len)
421                         continue;
422                 if (!isDigit(str)) {
423                         while (len && isDigit(str+len-1))
424                                 len--;
425                 }
426                 lev = isDigit(str+len) ? atoi(str+len) : 1;
427                 if (lev > MAX_OUT_LEVEL)
428                         lev = MAX_OUT_LEVEL;
429                 if (len == 4 && strncasecmp(str, "help", 4) == 0) {
430                         output_item_help(words);
431                         exit_cleanup(0);
432                 }
433                 if (len == 4 && strncasecmp(str, "none", 4) == 0)
434                         len = lev = 0;
435                 else if (len == 3 && strncasecmp(str, "all", 3) == 0)
436                         len = 0;
437                 for (j = 0; words[j].name; j++) {
438                         if (!len
439                          || (len == words[j].namelen && strncasecmp(str, words[j].name, len) == 0)) {
440                                 if (priority >= words[j].priority) {
441                                         words[j].priority = priority;
442                                         levels[j] = lev;
443                                 }
444                                 if (len)
445                                         break;
446                         }
447                 }
448                 if (len && !words[j].name) {
449                         rprintf(FERROR, "Unknown %s item: \"%.*s\"\n",
450                                 words[j].help, len, str);
451                         exit_cleanup(RERR_SYNTAX);
452                 }
453         }
454 }
455
456 /* Tell the user what all the info or debug flags mean. */
457 static void output_item_help(struct output_struct *words)
458 {
459         short *levels = words == info_words ? info_levels : debug_levels;
460         const char **verbosity = words == info_words ? info_verbosity : debug_verbosity;
461         char buf[128], *opt, *fmt = "%-10s %s\n";
462         int j;
463
464         reset_output_levels();
465
466         rprintf(FINFO, "Use OPT or OPT1 for level 1 output, OPT2 for level 2, etc.; OPT0 silences.\n");
467         rprintf(FINFO, "\n");
468         for (j = 0; words[j].name; j++)
469                 rprintf(FINFO, fmt, words[j].name, words[j].help);
470         rprintf(FINFO, "\n");
471
472         snprintf(buf, sizeof buf, "Set all %s options (e.g. all%d)",
473                  words[j].help, MAX_OUT_LEVEL);
474         rprintf(FINFO, fmt, "ALL", buf);
475
476         snprintf(buf, sizeof buf, "Silence all %s options (same as all0)",
477                  words[j].help);
478         rprintf(FINFO, fmt, "NONE", buf);
479
480         rprintf(FINFO, fmt, "HELP", "Output this help message");
481         rprintf(FINFO, "\n");
482         rprintf(FINFO, "Options added for each increase in verbose level:\n");
483
484         for (j = 1; j <= MAX_VERBOSITY; j++) {
485                 parse_output_words(words, levels, verbosity[j], HELP_PRIORITY);
486                 opt = make_output_option(words, levels, W_CLI|W_SRV|W_SND|W_REC);
487                 if (opt) {
488                         rprintf(FINFO, "%d) %s\n", j, strchr(opt, '=')+1);
489                         free(opt);
490                 }
491                 reset_output_levels();
492         }
493 }
494
495 /* The --verbose option now sets info+debug flags. */
496 static void set_output_verbosity(int level, uchar priority)
497 {
498         int j;
499
500         if (level > MAX_VERBOSITY)
501                 level = MAX_VERBOSITY;
502
503         for (j = 1; j <= level; j++) {
504                 parse_output_words(info_words, info_levels, info_verbosity[j], priority);
505                 parse_output_words(debug_words, debug_levels, debug_verbosity[j], priority);
506         }
507 }
508
509 /* Limit the info+debug flag levels given a verbose-option level limit. */
510 void limit_output_verbosity(int level)
511 {
512         short info_limits[COUNT_INFO], debug_limits[COUNT_DEBUG];
513         int j;
514
515         if (level > MAX_VERBOSITY)
516                 return;
517
518         memset(info_limits, 0, sizeof info_limits);
519         memset(debug_limits, 0, sizeof debug_limits);
520
521         /* Compute the level limits in the above arrays. */
522         for (j = 1; j <= level; j++) {
523                 parse_output_words(info_words, info_limits, info_verbosity[j], LIMIT_PRIORITY);
524                 parse_output_words(debug_words, debug_limits, debug_verbosity[j], LIMIT_PRIORITY);
525         }
526
527         for (j = 0; j < COUNT_INFO; j++) {
528                 if (info_levels[j] > info_limits[j])
529                         info_levels[j] = info_limits[j];
530         }
531
532         for (j = 0; j < COUNT_DEBUG; j++) {
533                 if (debug_levels[j] > debug_limits[j])
534                         debug_levels[j] = debug_limits[j];
535         }
536 }
537
538 void reset_output_levels(void)
539 {
540         int j;
541
542         memset(info_levels, 0, sizeof info_levels);
543         memset(debug_levels, 0, sizeof debug_levels);
544
545         for (j = 0; j < COUNT_INFO; j++)
546                 info_words[j].priority = DEFAULT_PRIORITY;
547
548         for (j = 0; j < COUNT_DEBUG; j++)
549                 debug_words[j].priority = DEFAULT_PRIORITY;
550 }
551
552 void negate_output_levels(void)
553 {
554         int j;
555
556         for (j = 0; j < COUNT_INFO; j++)
557                 info_levels[j] *= -1;
558
559         for (j = 0; j < COUNT_DEBUG; j++)
560                 debug_levels[j] *= -1;
561 }
562
563 static void print_rsync_version(enum logcode f)
564 {
565         char *subprotocol = "";
566         char const *got_socketpair = "no ";
567         char const *have_inplace = "no ";
568         char const *hardlinks = "no ";
569         char const *prealloc = "no ";
570         char const *symtimes = "no ";
571         char const *acls = "no ";
572         char const *xattrs = "no ";
573         char const *links = "no ";
574         char const *iconv = "no ";
575         char const *ipv6 = "no ";
576         STRUCT_STAT *dumstat;
577
578 #if SUBPROTOCOL_VERSION != 0
579         if (asprintf(&subprotocol, ".PR%d", SUBPROTOCOL_VERSION) < 0)
580                 out_of_memory("print_rsync_version");
581 #endif
582 #ifdef HAVE_SOCKETPAIR
583         got_socketpair = "";
584 #endif
585 #ifdef HAVE_FTRUNCATE
586         have_inplace = "";
587 #endif
588 #ifdef SUPPORT_HARD_LINKS
589         hardlinks = "";
590 #endif
591 #ifdef SUPPORT_PREALLOCATION
592         prealloc = "";
593 #endif
594 #ifdef SUPPORT_ACLS
595         acls = "";
596 #endif
597 #ifdef SUPPORT_XATTRS
598         xattrs = "";
599 #endif
600 #ifdef SUPPORT_LINKS
601         links = "";
602 #endif
603 #ifdef INET6
604         ipv6 = "";
605 #endif
606 #ifdef ICONV_OPTION
607         iconv = "";
608 #endif
609 #ifdef CAN_SET_SYMLINK_TIMES
610         symtimes = "";
611 #endif
612
613         rprintf(f, "%s  version %s  protocol version %d%s\n",
614                 RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION, subprotocol);
615         rprintf(f, "Copyright (C) 1996-2015 by Andrew Tridgell, Wayne Davison, and others.\n");
616         rprintf(f, "Web site: http://rsync.samba.org/\n");
617         rprintf(f, "Capabilities:\n");
618         rprintf(f, "    %d-bit files, %d-bit inums, %d-bit timestamps, %d-bit long ints,\n",
619                 (int)(sizeof (OFF_T) * 8),
620                 (int)(sizeof dumstat->st_ino * 8), /* Don't check ino_t! */
621                 (int)(sizeof (time_t) * 8),
622                 (int)(sizeof (int64) * 8));
623         rprintf(f, "    %ssocketpairs, %shardlinks, %ssymlinks, %sIPv6, batchfiles, %sinplace,\n",
624                 got_socketpair, hardlinks, links, ipv6, have_inplace);
625         rprintf(f, "    %sappend, %sACLs, %sxattrs, %siconv, %ssymtimes, %sprealloc\n",
626                 have_inplace, acls, xattrs, iconv, symtimes, prealloc);
627
628 #ifdef MAINTAINER_MODE
629         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
630 #endif
631
632 #if SIZEOF_INT64 < 8
633         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
634 #endif
635         if (sizeof (int64) != SIZEOF_INT64) {
636                 rprintf(f,
637                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
638                         (int) SIZEOF_INT64, (int) sizeof (int64));
639         }
640
641         rprintf(f,"\n");
642         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
643         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
644         rprintf(f,"General Public Licence for details.\n");
645 }
646
647
648 void usage(enum logcode F)
649 {
650   print_rsync_version(F);
651
652   rprintf(F,"\n");
653   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
654   rprintf(F,"via a fast differencing algorithm.\n");
655
656   rprintf(F,"\n");
657   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
658   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
659   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
660   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
661   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
662   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
663   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
664   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
665   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
666   rprintf(F,"\n");
667   rprintf(F,"Options\n");
668   rprintf(F," -v, --verbose               increase verbosity\n");
669   rprintf(F,"     --info=FLAGS            fine-grained informational verbosity\n");
670   rprintf(F,"     --debug=FLAGS           fine-grained debug verbosity\n");
671   rprintf(F,"     --msgs2stderr           special output handling for debugging\n");
672   rprintf(F," -q, --quiet                 suppress non-error messages\n");
673   rprintf(F,"     --no-motd               suppress daemon-mode MOTD (see manpage caveat)\n");
674   rprintf(F," -c, --checksum              skip based on checksum, not mod-time & size\n");
675   rprintf(F," -a, --archive               archive mode; equals -rlptgoD (no -H,-A,-X)\n");
676   rprintf(F,"     --no-OPTION             turn off an implied OPTION (e.g. --no-D)\n");
677   rprintf(F," -r, --recursive             recurse into directories\n");
678   rprintf(F," -R, --relative              use relative path names\n");
679   rprintf(F,"     --no-implied-dirs       don't send implied dirs with --relative\n");
680   rprintf(F," -b, --backup                make backups (see --suffix & --backup-dir)\n");
681   rprintf(F,"     --backup-dir=DIR        make backups into hierarchy based in DIR\n");
682   rprintf(F,"     --suffix=SUFFIX         set backup suffix (default %s w/o --backup-dir)\n",BACKUP_SUFFIX);
683   rprintf(F," -u, --update                skip files that are newer on the receiver\n");
684   rprintf(F,"     --inplace               update destination files in-place (SEE MAN PAGE)\n");
685   rprintf(F,"     --append                append data onto shorter files\n");
686   rprintf(F,"     --append-verify         like --append, but with old data in file checksum\n");
687   rprintf(F," -d, --dirs                  transfer directories without recursing\n");
688   rprintf(F," -l, --links                 copy symlinks as symlinks\n");
689   rprintf(F," -L, --copy-links            transform symlink into referent file/dir\n");
690   rprintf(F,"     --copy-unsafe-links     only \"unsafe\" symlinks are transformed\n");
691   rprintf(F,"     --safe-links            ignore symlinks that point outside the source tree\n");
692   rprintf(F,"     --munge-links           munge symlinks to make them safer (but unusable)\n");
693   rprintf(F," -k, --copy-dirlinks         transform symlink to a dir into referent dir\n");
694   rprintf(F," -K, --keep-dirlinks         treat symlinked dir on receiver as dir\n");
695   rprintf(F," -H, --hard-links            preserve hard links\n");
696   rprintf(F," -p, --perms                 preserve permissions\n");
697   rprintf(F," -E, --executability         preserve the file's executability\n");
698   rprintf(F,"     --chmod=CHMOD           affect file and/or directory permissions\n");
699 #ifdef SUPPORT_ACLS
700   rprintf(F," -A, --acls                  preserve ACLs (implies --perms)\n");
701 #endif
702 #ifdef SUPPORT_XATTRS
703   rprintf(F," -X, --xattrs                preserve extended attributes\n");
704 #endif
705   rprintf(F," -o, --owner                 preserve owner (super-user only)\n");
706   rprintf(F," -g, --group                 preserve group\n");
707   rprintf(F,"     --devices               preserve device files (super-user only)\n");
708   rprintf(F,"     --specials              preserve special files\n");
709   rprintf(F," -D                          same as --devices --specials\n");
710   rprintf(F," -t, --times                 preserve modification times\n");
711   rprintf(F," -O, --omit-dir-times        omit directories from --times\n");
712   rprintf(F," -J, --omit-link-times       omit symlinks from --times\n");
713   rprintf(F,"     --super                 receiver attempts super-user activities\n");
714 #ifdef SUPPORT_XATTRS
715   rprintf(F,"     --fake-super            store/recover privileged attrs using xattrs\n");
716 #endif
717   rprintf(F," -S, --sparse                handle sparse files efficiently\n");
718 #ifdef SUPPORT_PREALLOCATION
719   rprintf(F,"     --preallocate           allocate dest files before writing them\n");
720 #else
721   rprintf(F,"     --preallocate           pre-allocate dest files on remote receiver\n");
722 #endif
723   rprintf(F," -n, --dry-run               perform a trial run with no changes made\n");
724   rprintf(F," -W, --whole-file            copy files whole (without delta-xfer algorithm)\n");
725   rprintf(F,"     --checksum-choice=STR   choose the checksum algorithms\n");
726   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
727   rprintf(F," -B, --block-size=SIZE       force a fixed checksum block-size\n");
728   rprintf(F," -e, --rsh=COMMAND           specify the remote shell to use\n");
729   rprintf(F,"     --rsync-path=PROGRAM    specify the rsync to run on the remote machine\n");
730   rprintf(F,"     --existing              skip creating new files on receiver\n");
731   rprintf(F,"     --ignore-existing       skip updating files that already exist on receiver\n");
732   rprintf(F,"     --remove-source-files   sender removes synchronized files (non-dirs)\n");
733   rprintf(F,"     --del                   an alias for --delete-during\n");
734   rprintf(F,"     --delete                delete extraneous files from destination dirs\n");
735   rprintf(F,"     --delete-before         receiver deletes before transfer, not during\n");
736   rprintf(F,"     --delete-during         receiver deletes during the transfer\n");
737   rprintf(F,"     --delete-delay          find deletions during, delete after\n");
738   rprintf(F,"     --delete-after          receiver deletes after transfer, not during\n");
739   rprintf(F,"     --delete-excluded       also delete excluded files from destination dirs\n");
740   rprintf(F,"     --ignore-missing-args   ignore missing source args without error\n");
741   rprintf(F,"     --delete-missing-args   delete missing source args from destination\n");
742   rprintf(F,"     --ignore-errors         delete even if there are I/O errors\n");
743   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
744   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
745   rprintf(F,"     --max-size=SIZE         don't transfer any file larger than SIZE\n");
746   rprintf(F,"     --min-size=SIZE         don't transfer any file smaller than SIZE\n");
747   rprintf(F,"     --partial               keep partially transferred files\n");
748   rprintf(F,"     --partial-dir=DIR       put a partially transferred file into DIR\n");
749   rprintf(F,"     --delay-updates         put all updated files into place at transfer's end\n");
750   rprintf(F," -m, --prune-empty-dirs      prune empty directory chains from the file-list\n");
751   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
752   rprintf(F,"     --usermap=STRING        custom username mapping\n");
753   rprintf(F,"     --groupmap=STRING       custom groupname mapping\n");
754   rprintf(F,"     --chown=USER:GROUP      simple username/groupname mapping\n");
755   rprintf(F,"     --timeout=SECONDS       set I/O timeout in seconds\n");
756   rprintf(F,"     --contimeout=SECONDS    set daemon connection timeout in seconds\n");
757   rprintf(F," -I, --ignore-times          don't skip files that match in size and mod-time\n");
758   rprintf(F," -M, --remote-option=OPTION  send OPTION to the remote side only\n");
759   rprintf(F,"     --size-only             skip files that match in size\n");
760   rprintf(F," -@, --modify-window=NUM     set the accuracy for mod-time comparisons\n");
761   rprintf(F," -T, --temp-dir=DIR          create temporary files in directory DIR\n");
762   rprintf(F," -y, --fuzzy                 find similar file for basis if no dest file\n");
763   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
764   rprintf(F,"     --copy-dest=DIR         ... and include copies of unchanged files\n");
765   rprintf(F,"     --link-dest=DIR         hardlink to files in DIR when unchanged\n");
766   rprintf(F," -z, --compress              compress file data during the transfer\n");
767   rprintf(F,"     --compress-level=NUM    explicitly set compression level\n");
768   rprintf(F,"     --skip-compress=LIST    skip compressing files with a suffix in LIST\n");
769   rprintf(F," -C, --cvs-exclude           auto-ignore files the same way CVS does\n");
770   rprintf(F," -f, --filter=RULE           add a file-filtering RULE\n");
771   rprintf(F," -F                          same as --filter='dir-merge /.rsync-filter'\n");
772   rprintf(F,"                             repeated: --filter='- .rsync-filter'\n");
773   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
774   rprintf(F,"     --exclude-from=FILE     read exclude patterns from FILE\n");
775   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
776   rprintf(F,"     --include-from=FILE     read include patterns from FILE\n");
777   rprintf(F,"     --files-from=FILE       read list of source-file names from FILE\n");
778   rprintf(F," -0, --from0                 all *-from/filter files are delimited by 0s\n");
779   rprintf(F," -s, --protect-args          no space-splitting; only wildcard special-chars\n");
780   rprintf(F,"     --address=ADDRESS       bind address for outgoing socket to daemon\n");
781   rprintf(F,"     --port=PORT             specify double-colon alternate port number\n");
782   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
783   rprintf(F,"     --blocking-io           use blocking I/O for the remote shell\n");
784   rprintf(F,"     --stats                 give some file-transfer stats\n");
785   rprintf(F," -8, --8-bit-output          leave high-bit chars unescaped in output\n");
786   rprintf(F," -h, --human-readable        output numbers in a human-readable format\n");
787   rprintf(F,"     --progress              show progress during transfer\n");
788   rprintf(F," -P                          same as --partial --progress\n");
789   rprintf(F," -i, --itemize-changes       output a change-summary for all updates\n");
790   rprintf(F,"     --out-format=FORMAT     output updates using the specified FORMAT\n");
791   rprintf(F,"     --log-file=FILE         log what we're doing to the specified FILE\n");
792   rprintf(F,"     --log-file-format=FMT   log updates using the specified FMT\n");
793   rprintf(F,"     --password-file=FILE    read daemon-access password from FILE\n");
794   rprintf(F,"     --list-only             list the files instead of copying them\n");
795   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
796 #ifdef HAVE_SETVBUF
797   rprintf(F,"     --outbuf=N|L|B          set output buffering to None, Line, or Block\n");
798 #endif
799   rprintf(F,"     --write-batch=FILE      write a batched update to FILE\n");
800   rprintf(F,"     --only-write-batch=FILE like --write-batch but w/o updating destination\n");
801   rprintf(F,"     --read-batch=FILE       read a batched update from FILE\n");
802   rprintf(F,"     --protocol=NUM          force an older protocol version to be used\n");
803 #ifdef ICONV_OPTION
804   rprintf(F,"     --iconv=CONVERT_SPEC    request charset conversion of filenames\n");
805 #endif
806   rprintf(F,"     --checksum-seed=NUM     set block/file checksum seed (advanced)\n");
807   rprintf(F," -4, --ipv4                  prefer IPv4\n");
808   rprintf(F," -6, --ipv6                  prefer IPv6\n");
809   rprintf(F,"     --version               print version number\n");
810   rprintf(F,"(-h) --help                  show this help (-h is --help only if used alone)\n");
811
812   rprintf(F,"\n");
813   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
814   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
815   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
816 }
817
818 enum {OPT_VERSION = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
819       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
820       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
821       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
822       OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, OPT_INFO, OPT_DEBUG,
823       OPT_USERMAP, OPT_GROUPMAP, OPT_CHOWN, OPT_BWLIMIT,
824       OPT_SERVER, OPT_REFUSED_BASE = 9000};
825
826 static struct poptOption long_options[] = {
827   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
828   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
829   {"version",          0,  POPT_ARG_NONE,   0, OPT_VERSION, 0, 0},
830   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
831   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
832   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
833   {"info",             0,  POPT_ARG_STRING, 0, OPT_INFO, 0, 0 },
834   {"debug",            0,  POPT_ARG_STRING, 0, OPT_DEBUG, 0, 0 },
835   {"msgs2stderr",      0,  POPT_ARG_NONE,   &msgs2stderr, 0, 0, 0 },
836   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
837   {"motd",             0,  POPT_ARG_VAL,    &output_motd, 1, 0, 0 },
838   {"no-motd",          0,  POPT_ARG_VAL,    &output_motd, 0, 0, 0 },
839   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
840   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
841   {"no-human-readable",0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
842   {"no-h",             0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
843   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
844   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
845   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
846   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
847   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
848   {"inc-recursive",    0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
849   {"no-inc-recursive", 0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
850   {"i-r",              0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
851   {"no-i-r",           0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
852   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
853   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
854   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
855   {"old-dirs",         0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
856   {"old-d",            0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
857   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
858   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
859   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
860   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
861   {"acls",            'A', POPT_ARG_NONE,   0, 'A', 0, 0 },
862   {"no-acls",          0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
863   {"no-A",             0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
864   {"xattrs",          'X', POPT_ARG_NONE,   0, 'X', 0, 0 },
865   {"no-xattrs",        0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
866   {"no-X",             0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
867   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
868   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
869   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
870   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 1, 0, 0 },
871   {"no-omit-dir-times",0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
872   {"no-O",             0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
873   {"omit-link-times", 'J', POPT_ARG_VAL,    &omit_link_times, 1, 0, 0 },
874   {"no-omit-link-times",0, POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
875   {"no-J",             0,  POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
876   {"modify-window",   '@', POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
877   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
878   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
879   {"fake-super",       0,  POPT_ARG_VAL,    &am_root, -1, 0, 0 },
880   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
881   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
882   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
883   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
884   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
885   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
886   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
887   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
888   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
889   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
890   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
891   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
892   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
893   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
894   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
895   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
896   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
897   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
898   {"munge-links",      0,  POPT_ARG_VAL,    &munge_symlinks, 1, 0, 0 },
899   {"no-munge-links",   0,  POPT_ARG_VAL,    &munge_symlinks, 0, 0, 0 },
900   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
901   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
902   {"hard-links",      'H', POPT_ARG_NONE,   0, 'H', 0, 0 },
903   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
904   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
905   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
906   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
907   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
908   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
909   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
910   {"i-d",              0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
911   {"no-i-d",           0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
912   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
913   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
914   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
915   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
916   {"no-one-file-system",0, POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
917   {"no-x",             0,  POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
918   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
919   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
920   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
921   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
922   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
923   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
924   {"sparse",          'S', POPT_ARG_VAL,    &sparse_files, 1, 0, 0 },
925   {"no-sparse",        0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
926   {"no-S",             0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
927   {"preallocate",      0,  POPT_ARG_NONE,   &preallocate_files, 0, 0, 0},
928   {"inplace",          0,  POPT_ARG_VAL,    &inplace, 1, 0, 0 },
929   {"no-inplace",       0,  POPT_ARG_VAL,    &inplace, 0, 0, 0 },
930   {"append",           0,  POPT_ARG_NONE,   0, OPT_APPEND, 0, 0 },
931   {"append-verify",    0,  POPT_ARG_VAL,    &append_mode, 2, 0, 0 },
932   {"no-append",        0,  POPT_ARG_VAL,    &append_mode, 0, 0, 0 },
933   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
934   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
935   {"delete-before",    0,  POPT_ARG_NONE,   &delete_before, 0, 0, 0 },
936   {"delete-during",    0,  POPT_ARG_VAL,    &delete_during, 1, 0, 0 },
937   {"delete-delay",     0,  POPT_ARG_VAL,    &delete_during, 2, 0, 0 },
938   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
939   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
940   {"delete-missing-args",0,POPT_BIT_SET,    &missing_args, 2, 0, 0 },
941   {"ignore-missing-args",0,POPT_BIT_SET,    &missing_args, 1, 0, 0 },
942   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_source_files, 2, 0, 0 }, /* deprecated */
943   {"remove-source-files",0,POPT_ARG_VAL,    &remove_source_files, 1, 0, 0 },
944   {"force",            0,  POPT_ARG_VAL,    &force_delete, 1, 0, 0 },
945   {"no-force",         0,  POPT_ARG_VAL,    &force_delete, 0, 0, 0 },
946   {"ignore-errors",    0,  POPT_ARG_VAL,    &ignore_errors, 1, 0, 0 },
947   {"no-ignore-errors", 0,  POPT_ARG_VAL,    &ignore_errors, 0, 0, 0 },
948   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
949   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
950   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
951   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
952   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
953   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
954   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
955   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
956   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
957   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
958   {"checksum-choice",  0,  POPT_ARG_STRING, &checksum_choice, 0, 0, 0 },
959   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
960   {"checksum",        'c', POPT_ARG_VAL,    &always_checksum, 1, 0, 0 },
961   {"no-checksum",      0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
962   {"no-c",             0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
963   {"block-size",      'B', POPT_ARG_LONG,   &block_size, 0, 0, 0 },
964   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
965   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
966   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
967   {"fuzzy",           'y', POPT_ARG_NONE,   0, 'y', 0, 0 },
968   {"no-fuzzy",         0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
969   {"no-y",             0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
970   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
971   {"old-compress",     0,  POPT_ARG_VAL,    &do_compression, 1, 0, 0 },
972   {"new-compress",     0,  POPT_ARG_VAL,    &do_compression, 2, 0, 0 },
973   {"no-compress",      0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
974   {"no-z",             0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
975   {"skip-compress",    0,  POPT_ARG_STRING, &skip_compress, 0, 0, 0 },
976   {"compress-level",   0,  POPT_ARG_INT,    &def_compress_level, 0, 0, 0 },
977   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
978   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
979   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
980   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
981   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
982   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
983   {"delay-updates",    0,  POPT_ARG_VAL,    &delay_updates, 1, 0, 0 },
984   {"no-delay-updates", 0,  POPT_ARG_VAL,    &delay_updates, 0, 0, 0 },
985   {"prune-empty-dirs",'m', POPT_ARG_VAL,    &prune_empty_dirs, 1, 0, 0 },
986   {"no-prune-empty-dirs",0,POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
987   {"no-m",             0,  POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
988   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
989   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
990   {"out-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 },
991   {"log-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 }, /* DEPRECATED */
992   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
993   {"no-itemize-changes",0, POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
994   {"no-i",             0,  POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
995   {"bwlimit",          0,  POPT_ARG_STRING, &bwlimit_arg, OPT_BWLIMIT, 0, 0 },
996   {"no-bwlimit",       0,  POPT_ARG_VAL,    &bwlimit, 0, 0, 0 },
997   {"backup",          'b', POPT_ARG_VAL,    &make_backups, 1, 0, 0 },
998   {"no-backup",        0,  POPT_ARG_VAL,    &make_backups, 0, 0, 0 },
999   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
1000   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
1001   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
1002   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
1003   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
1004   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
1005   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
1006   {"from0",           '0', POPT_ARG_VAL,    &eol_nulls, 1, 0, 0},
1007   {"no-from0",         0,  POPT_ARG_VAL,    &eol_nulls, 0, 0, 0},
1008   {"protect-args",    's', POPT_ARG_VAL,    &protect_args, 1, 0, 0},
1009   {"no-protect-args",  0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1010   {"no-s",             0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1011   {"numeric-ids",      0,  POPT_ARG_VAL,    &numeric_ids, 1, 0, 0 },
1012   {"no-numeric-ids",   0,  POPT_ARG_VAL,    &numeric_ids, 0, 0, 0 },
1013   {"usermap",          0,  POPT_ARG_STRING, 0, OPT_USERMAP, 0, 0 },
1014   {"groupmap",         0,  POPT_ARG_STRING, 0, OPT_GROUPMAP, 0, 0 },
1015   {"chown",            0,  POPT_ARG_STRING, 0, OPT_CHOWN, 0, 0 },
1016   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
1017   {"no-timeout",       0,  POPT_ARG_VAL,    &io_timeout, 0, 0, 0 },
1018   {"contimeout",       0,  POPT_ARG_INT,    &connect_timeout, 0, 0, 0 },
1019   {"no-contimeout",    0,  POPT_ARG_VAL,    &connect_timeout, 0, 0, 0 },
1020   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
1021   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
1022   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1023 #ifdef ICONV_OPTION
1024   {"iconv",            0,  POPT_ARG_STRING, &iconv_opt, 0, 0, 0 },
1025   {"no-iconv",         0,  POPT_ARG_NONE,   0, OPT_NO_ICONV, 0, 0 },
1026 #endif
1027   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1028   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1029   {"8-bit-output",    '8', POPT_ARG_VAL,    &allow_8bit_chars, 1, 0, 0 },
1030   {"no-8-bit-output",  0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1031   {"no-8",             0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1032   {"qsort",            0,  POPT_ARG_NONE,   &use_qsort, 0, 0, 0 },
1033   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1034   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1035   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1036   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
1037   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
1038   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
1039 #ifdef HAVE_SETVBUF
1040   {"outbuf",           0,  POPT_ARG_STRING, &outbuf_mode, 0, 0, 0 },
1041 #endif
1042   {"remote-option",   'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1043   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1044   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
1045   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
1046   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
1047   /* All the following options switch us into daemon-mode option-parsing. */
1048   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1049   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1050   {"dparam",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1051   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1052   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1053   {0,0,0,0, 0, 0, 0}
1054 };
1055
1056 static void daemon_usage(enum logcode F)
1057 {
1058   print_rsync_version(F);
1059
1060   rprintf(F,"\n");
1061   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
1062   rprintf(F,"     --address=ADDRESS       bind to the specified address\n");
1063   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
1064   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
1065   rprintf(F," -M, --dparam=OVERRIDE       override global daemon config parameter\n");
1066   rprintf(F,"     --no-detach             do not detach from the parent\n");
1067   rprintf(F,"     --port=PORT             listen on alternate port number\n");
1068   rprintf(F,"     --log-file=FILE         override the \"log file\" setting\n");
1069   rprintf(F,"     --log-file-format=FMT   override the \"log format\" setting\n");
1070   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
1071   rprintf(F," -v, --verbose               increase verbosity\n");
1072   rprintf(F," -4, --ipv4                  prefer IPv4\n");
1073   rprintf(F," -6, --ipv6                  prefer IPv6\n");
1074   rprintf(F,"     --help                  show this help screen\n");
1075
1076   rprintf(F,"\n");
1077   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
1078   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
1079 }
1080
1081 static struct poptOption long_daemon_options[] = {
1082   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
1083   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1084   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
1085   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
1086   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
1087   {"dparam",          'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1088   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1089   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1090   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
1091   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
1092   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
1093   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
1094   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1095   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1096   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1097   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
1098   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1099   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
1100   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1101   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1102   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
1103   {0,0,0,0, 0, 0, 0}
1104 };
1105
1106
1107 static char err_buf[200];
1108
1109
1110 /**
1111  * Store the option error message, if any, so that we can log the
1112  * connection attempt (which requires parsing the options), and then
1113  * show the error later on.
1114  **/
1115 void option_error(void)
1116 {
1117         if (!err_buf[0]) {
1118                 strlcpy(err_buf, "Error parsing options: option may "
1119                         "be supported on client but not on server?\n",
1120                         sizeof err_buf);
1121         }
1122
1123         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
1124         msleep(20);
1125 }
1126
1127
1128 /**
1129  * Tweak the option table to disable all options that the rsyncd.conf
1130  * file has told us to refuse.
1131  **/
1132 static void set_refuse_options(char *bp)
1133 {
1134         struct poptOption *op;
1135         char *cp, shortname[2];
1136         int is_wild, found_match;
1137
1138         shortname[1] = '\0';
1139
1140         while (1) {
1141                 while (*bp == ' ') bp++;
1142                 if (!*bp)
1143                         break;
1144                 if ((cp = strchr(bp, ' ')) != NULL)
1145                         *cp= '\0';
1146                 is_wild = strpbrk(bp, "*?[") != NULL;
1147                 found_match = 0;
1148                 for (op = long_options; ; op++) {
1149                         *shortname = op->shortName;
1150                         if (!op->longName && !*shortname)
1151                                 break;
1152                         if ((op->longName && wildmatch(bp, op->longName))
1153                             || (*shortname && wildmatch(bp, shortname))) {
1154                                 if (op->argInfo == POPT_ARG_VAL)
1155                                         op->argInfo = POPT_ARG_NONE;
1156                                 op->val = (op - long_options) + OPT_REFUSED_BASE;
1157                                 found_match = 1;
1158                                 /* These flags are set to let us easily check
1159                                  * an implied option later in the code. */
1160                                 switch (*shortname) {
1161                                 case 'r': case 'd': case 'l': case 'p':
1162                                 case 't': case 'g': case 'o': case 'D':
1163                                         refused_archive_part = op->val;
1164                                         break;
1165                                 case 'z':
1166                                         refused_compress = op->val;
1167                                         break;
1168                                 case '\0':
1169                                         if (wildmatch("delete", op->longName))
1170                                                 refused_delete = op->val;
1171                                         else if (wildmatch("delete-before", op->longName))
1172                                                 refused_delete_before = op->val;
1173                                         else if (wildmatch("delete-during", op->longName))
1174                                                 refused_delete_during = op->val;
1175                                         else if (wildmatch("partial", op->longName))
1176                                                 refused_partial = op->val;
1177                                         else if (wildmatch("progress", op->longName))
1178                                                 refused_progress = op->val;
1179                                         else if (wildmatch("inplace", op->longName))
1180                                                 refused_inplace = op->val;
1181                                         else if (wildmatch("no-iconv", op->longName))
1182                                                 refused_no_iconv = op->val;
1183                                         break;
1184                                 }
1185                                 if (!is_wild)
1186                                         break;
1187                         }
1188                 }
1189                 if (!found_match) {
1190                         rprintf(FLOG, "No match for refuse-options string \"%s\"\n",
1191                                 bp);
1192                 }
1193                 if (!cp)
1194                         break;
1195                 *cp = ' ';
1196                 bp = cp + 1;
1197         }
1198 }
1199
1200
1201 static int count_args(const char **argv)
1202 {
1203         int i = 0;
1204
1205         if (argv) {
1206                 while (argv[i] != NULL)
1207                         i++;
1208         }
1209
1210         return i;
1211 }
1212
1213
1214 static OFF_T parse_size_arg(char **size_arg, char def_suf)
1215 {
1216         int reps, mult, make_compatible = 0;
1217         const char *arg;
1218         OFF_T size = 1;
1219
1220         for (arg = *size_arg; isDigit(arg); arg++) {}
1221         if (*arg == '.')
1222                 for (arg++; isDigit(arg); arg++) {}
1223         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
1224         case 'b': case 'B':
1225                 reps = 0;
1226                 break;
1227         case 'k': case 'K':
1228                 reps = 1;
1229                 break;
1230         case 'm': case 'M':
1231                 reps = 2;
1232                 break;
1233         case 'g': case 'G':
1234                 reps = 3;
1235                 break;
1236         default:
1237                 return -1;
1238         }
1239         if (*arg == 'b' || *arg == 'B')
1240                 mult = 1000, make_compatible = 1, arg++;
1241         else if (!*arg || *arg == '+' || *arg == '-')
1242                 mult = 1024;
1243         else if (strncasecmp(arg, "ib", 2) == 0)
1244                 mult = 1024, arg += 2;
1245         else
1246                 return -1;
1247         while (reps--)
1248                 size *= mult;
1249         size *= atof(*size_arg);
1250         if ((*arg == '+' || *arg == '-') && arg[1] == '1')
1251                 size += atoi(arg), make_compatible = 1, arg += 2;
1252         if (*arg)
1253                 return -1;
1254         if (size > 0 && make_compatible && def_suf == 'b') {
1255                 /* We convert this manually because we may need %lld precision,
1256                  * and that's not a portable sprintf() escape. */
1257                 char buf[128], *s = buf + sizeof buf - 1;
1258                 OFF_T num = size;
1259                 *s = '\0';
1260                 while (num) {
1261                         *--s = (char)(num % 10) + '0';
1262                         num /= 10;
1263                 }
1264                 if (!(*size_arg = strdup(s)))
1265                         out_of_memory("parse_size_arg");
1266         }
1267         return size;
1268 }
1269
1270
1271 static void create_refuse_error(int which)
1272 {
1273         /* The "which" value is the index + OPT_REFUSED_BASE. */
1274         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
1275         int n = snprintf(err_buf, sizeof err_buf,
1276                          "The server is configured to refuse --%s\n",
1277                          op->longName) - 1;
1278         if (op->shortName) {
1279                 snprintf(err_buf + n, sizeof err_buf - n,
1280                          " (-%c)\n", op->shortName);
1281         }
1282 }
1283
1284
1285 /**
1286  * Process command line arguments.  Called on both local and remote.
1287  *
1288  * @retval 1 if all options are OK; with globals set to appropriate
1289  * values
1290  *
1291  * @retval 0 on error, with err_buf containing an explanation
1292  **/
1293 int parse_arguments(int *argc_p, const char ***argv_p)
1294 {
1295         static poptContext pc;
1296         char *ref = lp_refuse_options(module_id);
1297         const char *arg, **argv = *argv_p;
1298         int argc = *argc_p;
1299         int opt;
1300
1301         if (ref && *ref)
1302                 set_refuse_options(ref);
1303         if (am_daemon) {
1304                 set_refuse_options("log-file*");
1305 #ifdef ICONV_OPTION
1306                 if (!*lp_charset(module_id))
1307                         set_refuse_options("iconv");
1308 #endif
1309         }
1310
1311 #ifdef ICONV_OPTION
1312         if (!am_daemon && protect_args <= 0 && (arg = getenv("RSYNC_ICONV")) != NULL && *arg)
1313                 iconv_opt = strdup(arg);
1314 #endif
1315
1316         /* TODO: Call poptReadDefaultConfig; handle errors. */
1317
1318         /* The context leaks in case of an error, but if there's a
1319          * problem we always exit anyhow. */
1320         if (pc)
1321                 poptFreeContext(pc);
1322         pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1323         if (!am_server)
1324                 poptReadDefaultConfig(pc, 0);
1325
1326         while ((opt = poptGetNextOpt(pc)) != -1) {
1327                 /* most options are handled automatically by popt;
1328                  * only special cases are returned and listed here. */
1329
1330                 switch (opt) {
1331                 case OPT_VERSION:
1332                         print_rsync_version(FINFO);
1333                         exit_cleanup(0);
1334
1335                 case OPT_SERVER:
1336                         if (!am_server) {
1337                                 /* Disable popt aliases on the server side and
1338                                  * then start parsing the options again. */
1339                                 poptFreeContext(pc);
1340                                 pc = poptGetContext(RSYNC_NAME, argc, argv,
1341                                                     long_options, 0);
1342                                 am_server = 1;
1343                         }
1344 #ifdef ICONV_OPTION
1345                         iconv_opt = NULL;
1346 #endif
1347                         break;
1348
1349                 case OPT_SENDER:
1350                         if (!am_server) {
1351                                 usage(FERROR);
1352                                 exit_cleanup(RERR_SYNTAX);
1353                         }
1354                         am_sender = 1;
1355                         break;
1356
1357                 case OPT_DAEMON:
1358                         if (am_daemon) {
1359                                 strlcpy(err_buf,
1360                                         "Attempt to hack rsync thwarted!\n",
1361                                         sizeof err_buf);
1362                                 return 0;
1363                         }
1364 #ifdef ICONV_OPTION
1365                         iconv_opt = NULL;
1366 #endif
1367                         protect_args = 0;
1368                         poptFreeContext(pc);
1369                         pc = poptGetContext(RSYNC_NAME, argc, argv,
1370                                             long_daemon_options, 0);
1371                         while ((opt = poptGetNextOpt(pc)) != -1) {
1372                                 char **cpp;
1373                                 switch (opt) {
1374                                 case 'h':
1375                                         daemon_usage(FINFO);
1376                                         exit_cleanup(0);
1377
1378                                 case 'M':
1379                                         arg = poptGetOptArg(pc);
1380                                         if (!strchr(arg, '=')) {
1381                                                 rprintf(FERROR,
1382                                                     "--dparam value is missing an '=': %s\n",
1383                                                     arg);
1384                                                 goto daemon_error;
1385                                         }
1386                                         cpp = EXPAND_ITEM_LIST(&dparam_list, char *, 4);
1387                                         *cpp = strdup(arg);
1388                                         break;
1389
1390                                 case 'v':
1391                                         verbose++;
1392                                         break;
1393
1394                                 default:
1395                                         rprintf(FERROR,
1396                                             "rsync: %s: %s (in daemon mode)\n",
1397                                             poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1398                                             poptStrerror(opt));
1399                                         goto daemon_error;
1400                                 }
1401                         }
1402
1403                         if (dparam_list.count && !set_dparams(1))
1404                                 exit_cleanup(RERR_SYNTAX);
1405
1406                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1407                                 snprintf(err_buf, sizeof err_buf,
1408                                          "the --temp-dir path is WAY too long.\n");
1409                                 return 0;
1410                         }
1411
1412                         if (!daemon_opt) {
1413                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
1414                             daemon_error:
1415                                 rprintf(FERROR,
1416                                     "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
1417                                 exit_cleanup(RERR_SYNTAX);
1418                         }
1419
1420                         *argv_p = argv = poptGetArgs(pc);
1421                         *argc_p = argc = count_args(argv);
1422                         am_starting_up = 0;
1423                         daemon_opt = 0;
1424                         am_daemon = 1;
1425                         return 1;
1426
1427                 case OPT_MODIFY_WINDOW:
1428                         /* The value has already been set by popt, but
1429                          * we need to remember that we're using a
1430                          * non-default setting. */
1431                         modify_window_set = 1;
1432                         break;
1433
1434                 case OPT_FILTER:
1435                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1436                                         rule_template(0), 0);
1437                         break;
1438
1439                 case OPT_EXCLUDE:
1440                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1441                                         rule_template(0), XFLG_OLD_PREFIXES);
1442                         break;
1443
1444                 case OPT_INCLUDE:
1445                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1446                                         rule_template(FILTRULE_INCLUDE), XFLG_OLD_PREFIXES);
1447                         break;
1448
1449                 case OPT_EXCLUDE_FROM:
1450                 case OPT_INCLUDE_FROM:
1451                         arg = poptGetOptArg(pc);
1452                         if (sanitize_paths)
1453                                 arg = sanitize_path(NULL, arg, NULL, 0, SP_DEFAULT);
1454                         if (daemon_filter_list.head) {
1455                                 int rej;
1456                                 char *cp = strdup(arg);
1457                                 if (!cp)
1458                                         out_of_memory("parse_arguments");
1459                                 if (!*cp)
1460                                         rej = 1;
1461                                 else {
1462                                         char *dir = cp + (*cp == '/' ? module_dirlen : 0);
1463                                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1464                                         rej = check_filter(&daemon_filter_list, FLOG, dir, 0) < 0;
1465                                 }
1466                                 free(cp);
1467                                 if (rej)
1468                                         goto options_rejected;
1469                         }
1470                         parse_filter_file(&filter_list, arg,
1471                                 rule_template(opt == OPT_INCLUDE_FROM ? FILTRULE_INCLUDE : 0),
1472                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
1473                         break;
1474
1475                 case 'a':
1476                         if (refused_archive_part) {
1477                                 create_refuse_error(refused_archive_part);
1478                                 return 0;
1479                         }
1480                         if (!recurse) /* preserve recurse == 2 */
1481                                 recurse = 1;
1482 #ifdef SUPPORT_LINKS
1483                         preserve_links = 1;
1484 #endif
1485                         preserve_perms = 1;
1486                         preserve_times = 1;
1487                         preserve_gid = 1;
1488                         preserve_uid = 1;
1489                         preserve_devices = 1;
1490                         preserve_specials = 1;
1491                         break;
1492
1493                 case 'D':
1494                         preserve_devices = preserve_specials = 1;
1495                         break;
1496
1497                 case OPT_NO_D:
1498                         preserve_devices = preserve_specials = 0;
1499                         break;
1500
1501                 case 'h':
1502                         human_readable++;
1503                         break;
1504
1505                 case 'H':
1506                         preserve_hard_links++;
1507                         break;
1508
1509                 case 'i':
1510                         itemize_changes++;
1511                         break;
1512
1513                 case 'v':
1514                         verbose++;
1515                         break;
1516
1517                 case 'y':
1518                         fuzzy_basis++;
1519                         break;
1520
1521                 case 'q':
1522                         quiet++;
1523                         break;
1524
1525                 case 'x':
1526                         one_file_system++;
1527                         break;
1528
1529                 case 'F':
1530                         switch (++F_option_cnt) {
1531                         case 1:
1532                                 parse_filter_str(&filter_list,": /.rsync-filter",rule_template(0),0);
1533                                 break;
1534                         case 2:
1535                                 parse_filter_str(&filter_list,"- .rsync-filter",rule_template(0),0);
1536                                 break;
1537                         }
1538                         break;
1539
1540                 case 'P':
1541                         if (refused_partial || refused_progress) {
1542                                 create_refuse_error(refused_partial
1543                                     ? refused_partial : refused_progress);
1544                                 return 0;
1545                         }
1546                         do_progress = 1;
1547                         keep_partial = 1;
1548                         break;
1549
1550                 case 'z':
1551                         do_compression++;
1552                         break;
1553
1554                 case 'M':
1555                         arg = poptGetOptArg(pc);
1556                         if (*arg != '-') {
1557                                 snprintf(err_buf, sizeof err_buf,
1558                                         "Remote option must start with a dash: %s\n", arg);
1559                                 return 0;
1560                         }
1561                         if (remote_option_cnt+2 >= remote_option_alloc) {
1562                                 remote_option_alloc += 16;
1563                                 remote_options = realloc_array(remote_options,
1564                                                         const char *, remote_option_alloc);
1565                                 if (!remote_options)
1566                                         out_of_memory("parse_arguments");
1567                                 if (!remote_option_cnt)
1568                                         remote_options[0] = "ARG0";
1569                         }
1570                         remote_options[++remote_option_cnt] = arg;
1571                         remote_options[remote_option_cnt+1] = NULL;
1572                         break;
1573
1574                 case OPT_WRITE_BATCH:
1575                         /* batch_name is already set */
1576                         write_batch = 1;
1577                         break;
1578
1579                 case OPT_ONLY_WRITE_BATCH:
1580                         /* batch_name is already set */
1581                         write_batch = -1;
1582                         break;
1583
1584                 case OPT_READ_BATCH:
1585                         /* batch_name is already set */
1586                         read_batch = 1;
1587                         break;
1588
1589                 case OPT_NO_ICONV:
1590 #ifdef ICONV_OPTION
1591                         iconv_opt = NULL;
1592 #endif
1593                         break;
1594
1595                 case OPT_MAX_SIZE:
1596                         if ((max_size = parse_size_arg(&max_size_arg, 'b')) < 0) {
1597                                 snprintf(err_buf, sizeof err_buf,
1598                                         "--max-size value is invalid: %s\n",
1599                                         max_size_arg);
1600                                 return 0;
1601                         }
1602                         break;
1603
1604                 case OPT_MIN_SIZE:
1605                         if ((min_size = parse_size_arg(&min_size_arg, 'b')) < 0) {
1606                                 snprintf(err_buf, sizeof err_buf,
1607                                         "--min-size value is invalid: %s\n",
1608                                         min_size_arg);
1609                                 return 0;
1610                         }
1611                         break;
1612
1613                 case OPT_BWLIMIT:
1614                         {
1615                                 OFF_T limit = parse_size_arg(&bwlimit_arg, 'K');
1616                                 if (limit < 0) {
1617                                         snprintf(err_buf, sizeof err_buf,
1618                                                 "--bwlimit value is invalid: %s\n", bwlimit_arg);
1619                                         return 0;
1620                                 }
1621                                 bwlimit = (limit + 512) / 1024;
1622                                 if (limit && !bwlimit) {
1623                                         snprintf(err_buf, sizeof err_buf,
1624                                                 "--bwlimit value is too small: %s\n", bwlimit_arg);
1625                                         return 0;
1626                                 }
1627                         }
1628                         break;
1629
1630                 case OPT_APPEND:
1631                         if (am_server)
1632                                 append_mode++;
1633                         else
1634                                 append_mode = 1;
1635                         break;
1636
1637                 case OPT_LINK_DEST:
1638 #ifdef SUPPORT_HARD_LINKS
1639                         link_dest = 1;
1640                         dest_option = "--link-dest";
1641                         goto set_dest_dir;
1642 #else
1643                         snprintf(err_buf, sizeof err_buf,
1644                                  "hard links are not supported on this %s\n",
1645                                  am_server ? "server" : "client");
1646                         return 0;
1647 #endif
1648
1649                 case OPT_COPY_DEST:
1650                         copy_dest = 1;
1651                         dest_option = "--copy-dest";
1652                         goto set_dest_dir;
1653
1654                 case OPT_COMPARE_DEST:
1655                         compare_dest = 1;
1656                         dest_option = "--compare-dest";
1657                 set_dest_dir:
1658                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1659                                 snprintf(err_buf, sizeof err_buf,
1660                                         "ERROR: at most %d %s args may be specified\n",
1661                                         MAX_BASIS_DIRS, dest_option);
1662                                 return 0;
1663                         }
1664                         /* We defer sanitizing this arg until we know what
1665                          * our destination directory is going to be. */
1666                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1667                         break;
1668
1669                 case OPT_CHMOD:
1670                         arg = poptGetOptArg(pc);
1671                         if (!parse_chmod(arg, &chmod_modes)) {
1672                                 snprintf(err_buf, sizeof err_buf,
1673                                     "Invalid argument passed to --chmod (%s)\n",
1674                                     arg);
1675                                 return 0;
1676                         }
1677                         break;
1678
1679                 case OPT_INFO:
1680                         arg = poptGetOptArg(pc);
1681                         parse_output_words(info_words, info_levels, arg, USER_PRIORITY);
1682                         break;
1683
1684                 case OPT_DEBUG:
1685                         arg = poptGetOptArg(pc);
1686                         parse_output_words(debug_words, debug_levels, arg, USER_PRIORITY);
1687                         break;
1688
1689                 case OPT_USERMAP:
1690                         if (usermap) {
1691                                 if (usermap_via_chown) {
1692                                         snprintf(err_buf, sizeof err_buf,
1693                                             "--usermap conflicts with prior --chown.\n");
1694                                         return 0;
1695                                 }
1696                                 snprintf(err_buf, sizeof err_buf,
1697                                     "You can only specify --usermap once.\n");
1698                                 return 0;
1699                         }
1700                         usermap = (char *)poptGetOptArg(pc);
1701                         usermap_via_chown = False;
1702                         break;
1703
1704                 case OPT_GROUPMAP:
1705                         if (groupmap) {
1706                                 if (groupmap_via_chown) {
1707                                         snprintf(err_buf, sizeof err_buf,
1708                                             "--groupmap conflicts with prior --chown.\n");
1709                                         return 0;
1710                                 }
1711                                 snprintf(err_buf, sizeof err_buf,
1712                                     "You can only specify --groupmap once.\n");
1713                                 return 0;
1714                         }
1715                         groupmap = (char *)poptGetOptArg(pc);
1716                         groupmap_via_chown = False;
1717                         break;
1718
1719                 case OPT_CHOWN: {
1720                         const char *chown = poptGetOptArg(pc);
1721                         int len;
1722                         if ((arg = strchr(chown, ':')) != NULL)
1723                                 len = arg++ - chown;
1724                         else
1725                                 len = strlen(chown);
1726                         if (len) {
1727                                 if (usermap) {
1728                                         if (!usermap_via_chown) {
1729                                                 snprintf(err_buf, sizeof err_buf,
1730                                                     "--chown conflicts with prior --usermap.\n");
1731                                                 return 0;
1732                                         }
1733                                         snprintf(err_buf, sizeof err_buf,
1734                                             "You can only specify a user-affecting --chown once.\n");
1735                                         return 0;
1736                                 }
1737                                 if (asprintf(&usermap, "*:%.*s", len, chown) < 0)
1738                                         out_of_memory("parse_arguments");
1739                                 usermap_via_chown = True;
1740                         }
1741                         if (arg && *arg) {
1742                                 if (groupmap) {
1743                                         if (!groupmap_via_chown) {
1744                                                 snprintf(err_buf, sizeof err_buf,
1745                                                     "--chown conflicts with prior --groupmap.\n");
1746                                                 return 0;
1747                                         }
1748                                         snprintf(err_buf, sizeof err_buf,
1749                                             "You can only specify a group-affecting --chown once.\n");
1750                                         return 0;
1751                                 }
1752                                 if (asprintf(&groupmap, "*:%s", arg) < 0)
1753                                         out_of_memory("parse_arguments");
1754                                 groupmap_via_chown = True;
1755                         }
1756                         break;
1757                 }
1758
1759                 case OPT_HELP:
1760                         usage(FINFO);
1761                         exit_cleanup(0);
1762
1763                 case 'A':
1764 #ifdef SUPPORT_ACLS
1765                         preserve_acls = 1;
1766                         preserve_perms = 1;
1767                         break;
1768 #else
1769                         /* FIXME: this should probably be ignored with a
1770                          * warning and then countermeasures taken to
1771                          * restrict group and other access in the presence
1772                          * of any more restrictive ACLs, but this is safe
1773                          * for now */
1774                         snprintf(err_buf,sizeof(err_buf),
1775                                  "ACLs are not supported on this %s\n",
1776                                  am_server ? "server" : "client");
1777                         return 0;
1778 #endif
1779
1780                 case 'X':
1781 #ifdef SUPPORT_XATTRS
1782                         preserve_xattrs++;
1783                         break;
1784 #else
1785                         snprintf(err_buf,sizeof(err_buf),
1786                                  "extended attributes are not supported on this %s\n",
1787                                  am_server ? "server" : "client");
1788                         return 0;
1789 #endif
1790
1791                 default:
1792                         /* A large opt value means that set_refuse_options()
1793                          * turned this option off. */
1794                         if (opt >= OPT_REFUSED_BASE) {
1795                                 create_refuse_error(opt);
1796                                 return 0;
1797                         }
1798                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
1799                                  am_server ? "on remote machine: " : "",
1800                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1801                                  poptStrerror(opt));
1802                         return 0;
1803                 }
1804         }
1805
1806         if (protect_args < 0) {
1807                 if (am_server)
1808                         protect_args = 0;
1809                 else if ((arg = getenv("RSYNC_PROTECT_ARGS")) != NULL && *arg)
1810                         protect_args = atoi(arg) ? 1 : 0;
1811                 else {
1812 #ifdef RSYNC_USE_PROTECTED_ARGS
1813                         protect_args = 1;
1814 #else
1815                         protect_args = 0;
1816 #endif
1817                 }
1818         }
1819
1820         if (checksum_choice && strcmp(checksum_choice, "auto") != 0 && strcmp(checksum_choice, "auto,auto") != 0) {
1821                 /* Call this early to verify the args and figure out if we need to force
1822                  * --whole-file. Note that the parse function will get called again later,
1823                  * just in case an "auto" choice needs to know the protocol_version. */
1824                 if (parse_checksum_choice())
1825                         whole_file = 1;
1826         } else
1827                 checksum_choice = NULL;
1828
1829         if (human_readable > 1 && argc == 2 && !am_server) {
1830                 /* Allow the old meaning of 'h' (--help) on its own. */
1831                 usage(FINFO);
1832                 exit_cleanup(0);
1833         }
1834
1835         if (do_compression || def_compress_level != NOT_SPECIFIED) {
1836                 if (def_compress_level == NOT_SPECIFIED)
1837                         def_compress_level = Z_DEFAULT_COMPRESSION;
1838                 else if (def_compress_level < Z_DEFAULT_COMPRESSION || def_compress_level > Z_BEST_COMPRESSION) {
1839                         snprintf(err_buf, sizeof err_buf, "--compress-level value is invalid: %d\n",
1840                                  def_compress_level);
1841                         return 0;
1842                 } else if (def_compress_level == Z_NO_COMPRESSION)
1843                         do_compression = 0;
1844                 else if (!do_compression)
1845                         do_compression = 1;
1846                 if (do_compression && refused_compress) {
1847                         create_refuse_error(refused_compress);
1848                         return 0;
1849                 }
1850 #ifdef EXTERNAL_ZLIB
1851                 if (do_compression == 1) {
1852                         snprintf(err_buf, sizeof err_buf,
1853                                 "This rsync lacks old-style --compress due to its external zlib.  Try -zz.\n");
1854                         if (am_server)
1855                                 return 0;
1856                         fprintf(stderr, "%s" "Continuing without compression.\n\n", err_buf);
1857                         do_compression = 0;
1858                 }
1859 #endif
1860         }
1861
1862 #ifdef HAVE_SETVBUF
1863         if (outbuf_mode && !am_server) {
1864                 int mode = *(uchar *)outbuf_mode;
1865                 if (islower(mode))
1866                         mode = toupper(mode);
1867                 fflush(stdout); /* Just in case... */
1868                 switch (mode) {
1869                 case 'N': /* None */
1870                 case 'U': /* Unbuffered */
1871                         mode = _IONBF;
1872                         break;
1873                 case 'L': /* Line */
1874                         mode = _IOLBF;
1875                         break;
1876                 case 'B': /* Block */
1877                 case 'F': /* Full */
1878                         mode = _IOFBF;
1879                         break;
1880                 default:
1881                         snprintf(err_buf, sizeof err_buf,
1882                                 "Invalid --outbuf setting -- specify N, L, or B.\n");
1883                         return 0;
1884                 }
1885                 setvbuf(stdout, (char *)NULL, mode, 0);
1886         }
1887
1888         if (msgs2stderr) {
1889                 /* Make stderr line buffered for better sharing of the stream. */
1890                 fflush(stderr); /* Just in case... */
1891                 setvbuf(stderr, (char *)NULL, _IOLBF, 0);
1892         }
1893 #endif
1894
1895         set_output_verbosity(verbose, DEFAULT_PRIORITY);
1896
1897         if (do_stats) {
1898                 parse_output_words(info_words, info_levels,
1899                         verbose > 1 ? "stats3" : "stats2", DEFAULT_PRIORITY);
1900         }
1901
1902 #ifdef ICONV_OPTION
1903         if (iconv_opt && protect_args != 2) {
1904                 if (!am_server && strcmp(iconv_opt, "-") == 0)
1905                         iconv_opt = NULL;
1906                 else
1907                         need_unsorted_flist = 1;
1908         }
1909         if (refused_no_iconv && !iconv_opt) {
1910                 create_refuse_error(refused_no_iconv);
1911                 return 0;
1912         }
1913 #endif
1914
1915         if (fuzzy_basis > 1)
1916                 fuzzy_basis = basis_dir_cnt + 1;
1917
1918         if (protect_args == 1 && am_server)
1919                 return 1;
1920
1921         *argv_p = argv = poptGetArgs(pc);
1922         *argc_p = argc = count_args(argv);
1923
1924 #ifndef SUPPORT_LINKS
1925         if (preserve_links && !am_sender) {
1926                 snprintf(err_buf, sizeof err_buf,
1927                          "symlinks are not supported on this %s\n",
1928                          am_server ? "server" : "client");
1929                 return 0;
1930         }
1931 #endif
1932
1933 #ifndef SUPPORT_HARD_LINKS
1934         if (preserve_hard_links) {
1935                 snprintf(err_buf, sizeof err_buf,
1936                          "hard links are not supported on this %s\n",
1937                          am_server ? "server" : "client");
1938                 return 0;
1939         }
1940 #endif
1941
1942 #ifdef SUPPORT_XATTRS
1943         if (am_root < 0 && preserve_xattrs > 1) {
1944                 snprintf(err_buf, sizeof err_buf,
1945                          "--fake-super conflicts with -XX\n");
1946                 return 0;
1947         }
1948 #else
1949         if (am_root < 0) {
1950                 snprintf(err_buf, sizeof err_buf,
1951                          "--fake-super requires an rsync with extended attributes enabled\n");
1952                 return 0;
1953         }
1954 #endif
1955
1956         if (block_size > MAX_BLOCK_SIZE) {
1957                 snprintf(err_buf, sizeof err_buf,
1958                          "--block-size=%lu is too large (max: %u)\n", block_size, MAX_BLOCK_SIZE);
1959                 return 0;
1960         }
1961
1962         if (write_batch && read_batch) {
1963                 snprintf(err_buf, sizeof err_buf,
1964                         "--write-batch and --read-batch can not be used together\n");
1965                 return 0;
1966         }
1967         if (write_batch > 0 || read_batch) {
1968                 if (am_server) {
1969                         rprintf(FINFO,
1970                                 "ignoring --%s-batch option sent to server\n",
1971                                 write_batch ? "write" : "read");
1972                         /* We don't actually exit_cleanup(), so that we can
1973                          * still service older version clients that still send
1974                          * batch args to server. */
1975                         read_batch = write_batch = 0;
1976                         batch_name = NULL;
1977                 } else if (dry_run)
1978                         write_batch = 0;
1979         } else if (write_batch < 0 && dry_run)
1980                 write_batch = 0;
1981         if (read_batch && files_from) {
1982                 snprintf(err_buf, sizeof err_buf,
1983                         "--read-batch cannot be used with --files-from\n");
1984                 return 0;
1985         }
1986         if (read_batch && remove_source_files) {
1987                 snprintf(err_buf, sizeof err_buf,
1988                         "--read-batch cannot be used with --remove-%s-files\n",
1989                         remove_source_files == 1 ? "source" : "sent");
1990                 return 0;
1991         }
1992         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
1993                 snprintf(err_buf, sizeof err_buf,
1994                         "the batch-file name must be %d characters or less.\n",
1995                         MAX_BATCH_NAME_LEN);
1996                 return 0;
1997         }
1998
1999         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
2000                 snprintf(err_buf, sizeof err_buf,
2001                          "the --temp-dir path is WAY too long.\n");
2002                 return 0;
2003         }
2004
2005         if (max_delete < 0 && max_delete != INT_MIN) {
2006                 /* Negative numbers are treated as "no deletions". */
2007                 max_delete = 0;
2008         }
2009
2010         if (compare_dest + copy_dest + link_dest > 1) {
2011                 snprintf(err_buf, sizeof err_buf,
2012                         "You may not mix --compare-dest, --copy-dest, and --link-dest.\n");
2013                 return 0;
2014         }
2015
2016         if (files_from) {
2017                 if (recurse == 1) /* preserve recurse == 2 */
2018                         recurse = 0;
2019                 if (xfer_dirs < 0)
2020                         xfer_dirs = 1;
2021         }
2022
2023         if (argc < 2 && !read_batch && !am_server)
2024                 list_only |= 1;
2025
2026         if (xfer_dirs >= 4) {
2027                 parse_filter_str(&filter_list, "- /*/*", rule_template(0), 0);
2028                 recurse = xfer_dirs = 1;
2029         } else if (recurse)
2030                 xfer_dirs = 1;
2031         else if (xfer_dirs < 0)
2032                 xfer_dirs = list_only ? 1 : 0;
2033
2034         if (relative_paths < 0)
2035                 relative_paths = files_from? 1 : 0;
2036         if (!relative_paths)
2037                 implied_dirs = 0;
2038
2039         if (delete_before + !!delete_during + delete_after > 1) {
2040                 snprintf(err_buf, sizeof err_buf,
2041                         "You may not combine multiple --delete-WHEN options.\n");
2042                 return 0;
2043         }
2044         if (delete_before || delete_during || delete_after)
2045                 delete_mode = 1;
2046         else if (delete_mode || delete_excluded) {
2047                 /* Only choose now between before & during if one is refused. */
2048                 if (refused_delete_before) {
2049                         if (!refused_delete_during)
2050                                 delete_during = 1;
2051                         else {
2052                                 create_refuse_error(refused_delete_before);
2053                                 return 0;
2054                         }
2055                 } else if (refused_delete_during)
2056                         delete_before = 1;
2057                 delete_mode = 1;
2058         }
2059         if (!xfer_dirs && delete_mode) {
2060                 snprintf(err_buf, sizeof err_buf,
2061                         "--delete does not work without --recursive (-r) or --dirs (-d).\n");
2062                 return 0;
2063         }
2064
2065         if (missing_args == 3) /* simplify if both options were specified */
2066                 missing_args = 2;
2067         if (refused_delete && (delete_mode || missing_args == 2)) {
2068                 create_refuse_error(refused_delete);
2069                 return 0;
2070         }
2071
2072         if (remove_source_files) {
2073                 /* We only want to infer this refusal of --remove-source-files
2074                  * via the refusal of "delete", not any of the "delete-FOO"
2075                  * options. */
2076                 if (refused_delete && am_sender) {
2077                         create_refuse_error(refused_delete);
2078                         return 0;
2079                 }
2080                 need_messages_from_generator = 1;
2081         }
2082
2083         if (munge_symlinks && !am_daemon) {
2084                 STRUCT_STAT st;
2085                 char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */
2086                 strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */
2087                 if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) {
2088                         rprintf(FERROR, "Symlink munging is unsafe when a %s directory exists.\n",
2089                                 prefix);
2090                         exit_cleanup(RERR_UNSUPPORTED);
2091                 }
2092         }
2093
2094         if (sanitize_paths) {
2095                 int i;
2096                 for (i = argc; i-- > 0; )
2097                         argv[i] = sanitize_path(NULL, argv[i], "", 0, SP_KEEP_DOT_DIRS);
2098                 if (tmpdir)
2099                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, SP_DEFAULT);
2100                 if (backup_dir)
2101                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, SP_DEFAULT);
2102         }
2103         if (daemon_filter_list.head && !am_sender) {
2104                 filter_rule_list *elp = &daemon_filter_list;
2105                 if (tmpdir) {
2106                         char *dir;
2107                         if (!*tmpdir)
2108                                 goto options_rejected;
2109                         dir = tmpdir + (*tmpdir == '/' ? module_dirlen : 0);
2110                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2111                         if (check_filter(elp, FLOG, dir, 1) < 0)
2112                                 goto options_rejected;
2113                 }
2114                 if (backup_dir) {
2115                         char *dir;
2116                         if (!*backup_dir)
2117                                 goto options_rejected;
2118                         dir = backup_dir + (*backup_dir == '/' ? module_dirlen : 0);
2119                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2120                         if (check_filter(elp, FLOG, dir, 1) < 0)
2121                                 goto options_rejected;
2122                 }
2123         }
2124
2125         if (!backup_suffix)
2126                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
2127         backup_suffix_len = strlen(backup_suffix);
2128         if (strchr(backup_suffix, '/') != NULL) {
2129                 snprintf(err_buf, sizeof err_buf,
2130                         "--suffix cannot contain slashes: %s\n",
2131                         backup_suffix);
2132                 return 0;
2133         }
2134         if (backup_dir) {
2135                 size_t len;
2136                 while (*backup_dir == '.' && backup_dir[1] == '/')
2137                         backup_dir += 2;
2138                 if (*backup_dir == '.' && backup_dir[1] == '\0')
2139                         backup_dir++;
2140                 len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
2141                 if (len > sizeof backup_dir_buf - 128) {
2142                         snprintf(err_buf, sizeof err_buf,
2143                                 "the --backup-dir path is WAY too long.\n");
2144                         return 0;
2145                 }
2146                 backup_dir_len = (int)len;
2147                 if (!backup_dir_len) {
2148                         backup_dir_len = -1;
2149                         backup_dir = NULL;
2150                 } else if (backup_dir_buf[backup_dir_len - 1] != '/') {
2151                         backup_dir_buf[backup_dir_len++] = '/';
2152                         backup_dir_buf[backup_dir_len] = '\0';
2153                 }
2154                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
2155         }
2156         if (backup_dir) {
2157                 /* No need for a suffix or a protect rule. */
2158         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
2159                 snprintf(err_buf, sizeof err_buf,
2160                         "--suffix cannot be empty %s\n", backup_dir_len < 0
2161                         ? "when --backup-dir is the same as the dest dir"
2162                         : "without a --backup-dir");
2163                 return 0;
2164         } else if (make_backups && delete_mode && !delete_excluded && !am_server) {
2165                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
2166                         "P *%s", backup_suffix);
2167                 parse_filter_str(&filter_list, backup_dir_buf, rule_template(0), 0);
2168         }
2169
2170         if (preserve_times) {
2171                 preserve_times = PRESERVE_FILE_TIMES;
2172                 if (!omit_dir_times)
2173                         preserve_times |= PRESERVE_DIR_TIMES;
2174 #ifdef CAN_SET_SYMLINK_TIMES
2175                 if (!omit_link_times)
2176                         preserve_times |= PRESERVE_LINK_TIMES;
2177 #endif
2178         }
2179
2180         if (make_backups && !backup_dir) {
2181                 omit_dir_times = 0; /* Implied, so avoid -O to sender. */
2182                 preserve_times &= ~PRESERVE_DIR_TIMES;
2183         }
2184
2185         if (stdout_format) {
2186                 if (am_server && log_format_has(stdout_format, 'I'))
2187                         stdout_format_has_i = 2;
2188                 else if (log_format_has(stdout_format, 'i'))
2189                         stdout_format_has_i = itemize_changes | 1;
2190                 if (!log_format_has(stdout_format, 'b')
2191                  && !log_format_has(stdout_format, 'c')
2192                  && !log_format_has(stdout_format, 'C'))
2193                         log_before_transfer = !am_server;
2194         } else if (itemize_changes) {
2195                 stdout_format = "%i %n%L";
2196                 stdout_format_has_i = itemize_changes;
2197                 log_before_transfer = !am_server;
2198         }
2199
2200         if (do_progress && !am_server) {
2201                 if (!log_before_transfer && INFO_EQ(NAME, 0))
2202                         parse_output_words(info_words, info_levels, "name", DEFAULT_PRIORITY);
2203                 parse_output_words(info_words, info_levels, "flist2,progress", DEFAULT_PRIORITY);
2204         }
2205
2206         if (dry_run)
2207                 do_xfers = 0;
2208
2209         set_io_timeout(io_timeout);
2210
2211         if (INFO_GTE(NAME, 1) && !stdout_format) {
2212                 stdout_format = "%n%L";
2213                 log_before_transfer = !am_server;
2214         }
2215         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
2216                 stdout_format_has_o_or_i = 1;
2217
2218         if (logfile_name && !am_daemon) {
2219                 if (!logfile_format) {
2220                         logfile_format = "%i %n%L";
2221                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
2222                 } else {
2223                         if (log_format_has(logfile_format, 'i'))
2224                                 logfile_format_has_i = 1;
2225                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
2226                                 logfile_format_has_o_or_i = 1;
2227                 }
2228                 log_init(0);
2229         } else if (!am_daemon)
2230                 logfile_format = NULL;
2231
2232         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
2233                 bwlimit = daemon_bwlimit;
2234         if (bwlimit) {
2235                 bwlimit_writemax = (size_t)bwlimit * 128;
2236                 if (bwlimit_writemax < 512)
2237                         bwlimit_writemax = 512;
2238         }
2239
2240         if (sparse_files && inplace) {
2241                 /* Note: we don't check for this below, because --append is
2242                  * OK with --sparse (as long as redos are handled right). */
2243                 snprintf(err_buf, sizeof err_buf,
2244                          "--sparse cannot be used with --inplace\n");
2245                 return 0;
2246         }
2247
2248         if (append_mode) {
2249                 if (whole_file > 0) {
2250                         snprintf(err_buf, sizeof err_buf,
2251                                  "--append cannot be used with --whole-file\n");
2252                         return 0;
2253                 }
2254                 if (refused_inplace) {
2255                         create_refuse_error(refused_inplace);
2256                         return 0;
2257                 }
2258                 inplace = 1;
2259         }
2260
2261         if (delay_updates && !partial_dir)
2262                 partial_dir = tmp_partialdir;
2263
2264         if (inplace) {
2265 #ifdef HAVE_FTRUNCATE
2266                 if (partial_dir) {
2267                         snprintf(err_buf, sizeof err_buf,
2268                                  "--%s cannot be used with --%s\n",
2269                                  append_mode ? "append" : "inplace",
2270                                  delay_updates ? "delay-updates" : "partial-dir");
2271                         return 0;
2272                 }
2273                 /* --inplace implies --partial for refusal purposes, but we
2274                  * clear the keep_partial flag for internal logic purposes. */
2275                 if (refused_partial) {
2276                         create_refuse_error(refused_partial);
2277                         return 0;
2278                 }
2279                 keep_partial = 0;
2280 #else
2281                 snprintf(err_buf, sizeof err_buf,
2282                          "--%s is not supported on this %s\n",
2283                          append_mode ? "append" : "inplace",
2284                          am_server ? "server" : "client");
2285                 return 0;
2286 #endif
2287         } else {
2288                 if (keep_partial && !partial_dir && !am_server) {
2289                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
2290                                 partial_dir = strdup(arg);
2291                 }
2292                 if (partial_dir) {
2293                         if (*partial_dir)
2294                                 clean_fname(partial_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2295                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
2296                                 partial_dir = NULL;
2297                         if (!partial_dir && refused_partial) {
2298                                 create_refuse_error(refused_partial);
2299                                 return 0;
2300                         }
2301                         keep_partial = 1;
2302                 }
2303         }
2304
2305         if (files_from) {
2306                 char *h, *p;
2307                 int q;
2308                 if (argc > 2 || (!am_daemon && !am_server && argc == 1)) {
2309                         usage(FERROR);
2310                         exit_cleanup(RERR_SYNTAX);
2311                 }
2312                 if (strcmp(files_from, "-") == 0) {
2313                         filesfrom_fd = 0;
2314                         if (am_server)
2315                                 filesfrom_host = ""; /* reading from socket */
2316                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
2317                         if (am_server) {
2318                                 snprintf(err_buf, sizeof err_buf,
2319                                         "The --files-from sent to the server cannot specify a host.\n");
2320                                 return 0;
2321                         }
2322                         files_from = p;
2323                         filesfrom_host = h;
2324                         if (strcmp(files_from, "-") == 0) {
2325                                 snprintf(err_buf, sizeof err_buf,
2326                                         "Invalid --files-from remote filename\n");
2327                                 return 0;
2328                         }
2329                 } else {
2330                         if (sanitize_paths)
2331                                 files_from = sanitize_path(NULL, files_from, NULL, 0, SP_DEFAULT);
2332                         if (daemon_filter_list.head) {
2333                                 char *dir;
2334                                 if (!*files_from)
2335                                         goto options_rejected;
2336                                 dir = files_from + (*files_from == '/' ? module_dirlen : 0);
2337                                 clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2338                                 if (check_filter(&daemon_filter_list, FLOG, dir, 0) < 0)
2339                                         goto options_rejected;
2340                         }
2341                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
2342                         if (filesfrom_fd < 0) {
2343                                 snprintf(err_buf, sizeof err_buf,
2344                                         "failed to open files-from file %s: %s\n",
2345                                         files_from, strerror(errno));
2346                                 return 0;
2347                         }
2348                 }
2349         }
2350
2351         am_starting_up = 0;
2352
2353         return 1;
2354
2355   options_rejected:
2356         snprintf(err_buf, sizeof err_buf,
2357                 "Your options have been rejected by the server.\n");
2358         return 0;
2359 }
2360
2361
2362 /**
2363  * Construct a filtered list of options to pass through from the
2364  * client to the server.
2365  *
2366  * This involves setting options that will tell the server how to
2367  * behave, and also filtering out options that are processed only
2368  * locally.
2369  **/
2370 void server_options(char **args, int *argc_p)
2371 {
2372         static char argstr[64];
2373         int ac = *argc_p;
2374         uchar where;
2375         char *arg;
2376         int i, x;
2377
2378         /* This should always remain first on the server's command-line. */
2379         args[ac++] = "--server";
2380
2381         if (daemon_over_rsh > 0) {
2382                 args[ac++] = "--daemon";
2383                 *argc_p = ac;
2384                 /* if we're passing --daemon, we're done */
2385                 return;
2386         }
2387
2388         if (!am_sender)
2389                 args[ac++] = "--sender";
2390
2391         x = 1;
2392         argstr[0] = '-';
2393
2394         if (protect_args)
2395                 argstr[x++] = 's';
2396
2397         for (i = 0; i < verbose; i++)
2398                 argstr[x++] = 'v';
2399
2400         /* the -q option is intentionally left out */
2401         if (make_backups)
2402                 argstr[x++] = 'b';
2403         if (update_only)
2404                 argstr[x++] = 'u';
2405         if (!do_xfers) /* Note: NOT "dry_run"! */
2406                 argstr[x++] = 'n';
2407         if (preserve_links)
2408                 argstr[x++] = 'l';
2409         if ((xfer_dirs >= 2 && xfer_dirs < 4)
2410          || (xfer_dirs && !recurse && (list_only || (delete_mode && am_sender))))
2411                 argstr[x++] = 'd';
2412         if (am_sender) {
2413                 if (keep_dirlinks)
2414                         argstr[x++] = 'K';
2415                 if (prune_empty_dirs)
2416                         argstr[x++] = 'm';
2417                 if (omit_dir_times)
2418                         argstr[x++] = 'O';
2419                 if (omit_link_times)
2420                         argstr[x++] = 'J';
2421                 if (fuzzy_basis) {
2422                         argstr[x++] = 'y';
2423                         if (fuzzy_basis > 1)
2424                                 argstr[x++] = 'y';
2425                 }
2426         } else {
2427                 if (copy_links)
2428                         argstr[x++] = 'L';
2429                 if (copy_dirlinks)
2430                         argstr[x++] = 'k';
2431         }
2432
2433         if (whole_file > 0)
2434                 argstr[x++] = 'W';
2435         /* We don't need to send --no-whole-file, because it's the
2436          * default for remote transfers, and in any case old versions
2437          * of rsync will not understand it. */
2438
2439         if (preserve_hard_links) {
2440                 argstr[x++] = 'H';
2441                 if (preserve_hard_links > 1)
2442                         argstr[x++] = 'H';
2443         }
2444         if (preserve_uid)
2445                 argstr[x++] = 'o';
2446         if (preserve_gid)
2447                 argstr[x++] = 'g';
2448         if (preserve_devices) /* ignore preserve_specials here */
2449                 argstr[x++] = 'D';
2450         if (preserve_times)
2451                 argstr[x++] = 't';
2452         if (preserve_perms)
2453                 argstr[x++] = 'p';
2454         else if (preserve_executability && am_sender)
2455                 argstr[x++] = 'E';
2456 #ifdef SUPPORT_ACLS
2457         if (preserve_acls)
2458                 argstr[x++] = 'A';
2459 #endif
2460 #ifdef SUPPORT_XATTRS
2461         if (preserve_xattrs) {
2462                 argstr[x++] = 'X';
2463                 if (preserve_xattrs > 1)
2464                         argstr[x++] = 'X';
2465         }
2466 #endif
2467         if (recurse)
2468                 argstr[x++] = 'r';
2469         if (always_checksum)
2470                 argstr[x++] = 'c';
2471         if (cvs_exclude)
2472                 argstr[x++] = 'C';
2473         if (ignore_times)
2474                 argstr[x++] = 'I';
2475         if (relative_paths)
2476                 argstr[x++] = 'R';
2477         if (one_file_system) {
2478                 argstr[x++] = 'x';
2479                 if (one_file_system > 1)
2480                         argstr[x++] = 'x';
2481         }
2482         if (sparse_files)
2483                 argstr[x++] = 'S';
2484         if (do_compression == 1)
2485                 argstr[x++] = 'z';
2486
2487         set_allow_inc_recurse();
2488
2489         /* We don't really know the actual protocol_version at this point,
2490          * but checking the pre-negotiated value allows the user to use a
2491          * --protocol=29 override to avoid the use of this -eFLAGS opt. */
2492         if (protocol_version >= 30) {
2493                 /* Use "eFlags" alias so that cull_options doesn't think that these are no-arg option letters. */
2494 #define eFlags argstr
2495                 /* We make use of the -e option to let the server know about
2496                  * any pre-release protocol version && some behavior flags. */
2497                 eFlags[x++] = 'e';
2498 #if SUBPROTOCOL_VERSION != 0
2499                 if (protocol_version == PROTOCOL_VERSION) {
2500                         x += snprintf(argstr+x, sizeof argstr - x,
2501                                       "%d.%d",
2502                                       PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
2503                 } else
2504 #endif
2505                         eFlags[x++] = '.';
2506                 if (allow_inc_recurse)
2507                         eFlags[x++] = 'i';
2508 #ifdef CAN_SET_SYMLINK_TIMES
2509                 eFlags[x++] = 'L'; /* symlink time-setting support */
2510 #endif
2511 #ifdef ICONV_OPTION
2512                 eFlags[x++] = 's'; /* symlink iconv translation support */
2513 #endif
2514                 eFlags[x++] = 'f'; /* flist I/O-error safety support */
2515                 eFlags[x++] = 'x'; /* xattr hardlink optimization not desired */
2516                 eFlags[x++] = 'C'; /* support checksum seed order fix */
2517 #undef eFlags
2518         }
2519
2520         if (x >= (int)sizeof argstr) { /* Not possible... */
2521                 rprintf(FERROR, "argstr overflow in server_options().\n");
2522                 exit_cleanup(RERR_MALLOC);
2523         }
2524
2525         argstr[x] = '\0';
2526
2527         if (x > 1)
2528                 args[ac++] = argstr;
2529
2530 #ifdef ICONV_OPTION
2531         if (iconv_opt) {
2532                 char *set = strchr(iconv_opt, ',');
2533                 if (set)
2534                         set++;
2535                 else
2536                         set = iconv_opt;
2537                 if (asprintf(&arg, "--iconv=%s", set) < 0)
2538                         goto oom;
2539                 args[ac++] = arg;
2540         }
2541 #endif
2542
2543         if (protect_args && !local_server) /* unprotected args stop here */
2544                 args[ac++] = NULL;
2545
2546         if (list_only > 1)
2547                 args[ac++] = "--list-only";
2548
2549         /* This makes sure that the remote rsync can handle deleting with -d
2550          * sans -r because the --no-r option was added at the same time. */
2551         if (xfer_dirs && !recurse && delete_mode && am_sender)
2552                 args[ac++] = "--no-r";
2553
2554         if (do_compression && def_compress_level != Z_DEFAULT_COMPRESSION) {
2555                 if (asprintf(&arg, "--compress-level=%d", def_compress_level) < 0)
2556                         goto oom;
2557                 args[ac++] = arg;
2558         }
2559
2560         if (preserve_devices) {
2561                 /* Note: sending "--devices" would not be backward-compatible. */
2562                 if (!preserve_specials)
2563                         args[ac++] = "--no-specials"; /* -D is already set. */
2564         } else if (preserve_specials)
2565                 args[ac++] = "--specials";
2566
2567         /* The server side doesn't use our log-format, but in certain
2568          * circumstances they need to know a little about the option. */
2569         if (stdout_format && am_sender) {
2570                 /* Use --log-format, not --out-format, for compatibility. */
2571                 if (stdout_format_has_i > 1)
2572                         args[ac++] = "--log-format=%i%I";
2573                 else if (stdout_format_has_i)
2574                         args[ac++] = "--log-format=%i";
2575                 else if (stdout_format_has_o_or_i)
2576                         args[ac++] = "--log-format=%o";
2577                 else if (!verbose)
2578                         args[ac++] = "--log-format=X";
2579         }
2580
2581         if (block_size) {
2582                 if (asprintf(&arg, "-B%lu", block_size) < 0)
2583                         goto oom;
2584                 args[ac++] = arg;
2585         }
2586
2587         if (io_timeout) {
2588                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
2589                         goto oom;
2590                 args[ac++] = arg;
2591         }
2592
2593         if (bwlimit) {
2594                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
2595                         goto oom;
2596                 args[ac++] = arg;
2597         }
2598
2599         if (backup_dir) {
2600                 args[ac++] = "--backup-dir";
2601                 args[ac++] = backup_dir;
2602         }
2603
2604         /* Only send --suffix if it specifies a non-default value. */
2605         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
2606                 /* We use the following syntax to avoid weirdness with '~'. */
2607                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
2608                         goto oom;
2609                 args[ac++] = arg;
2610         }
2611
2612         if (checksum_choice) {
2613                 if (asprintf(&arg, "--checksum-choice=%s", checksum_choice) < 0)
2614                         goto oom;
2615                 args[ac++] = arg;
2616         }
2617
2618         if (am_sender) {
2619                 if (max_delete > 0) {
2620                         if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
2621                                 goto oom;
2622                         args[ac++] = arg;
2623                 } else if (max_delete == 0)
2624                         args[ac++] = "--max-delete=-1";
2625                 if (min_size >= 0) {
2626                         args[ac++] = "--min-size";
2627                         args[ac++] = min_size_arg;
2628                 }
2629                 if (max_size >= 0) {
2630                         args[ac++] = "--max-size";
2631                         args[ac++] = max_size_arg;
2632                 }
2633                 if (delete_before)
2634                         args[ac++] = "--delete-before";
2635                 else if (delete_during == 2)
2636                         args[ac++] = "--delete-delay";
2637                 else if (delete_during)
2638                         args[ac++] = "--delete-during";
2639                 else if (delete_after)
2640                         args[ac++] = "--delete-after";
2641                 else if (delete_mode && !delete_excluded)
2642                         args[ac++] = "--delete";
2643                 if (delete_excluded)
2644                         args[ac++] = "--delete-excluded";
2645                 if (force_delete)
2646                         args[ac++] = "--force";
2647                 if (write_batch < 0)
2648                         args[ac++] = "--only-write-batch=X";
2649                 if (am_root > 1)
2650                         args[ac++] = "--super";
2651                 if (size_only)
2652                         args[ac++] = "--size-only";
2653                 if (do_stats)
2654                         args[ac++] = "--stats";
2655         } else {
2656                 if (skip_compress) {
2657                         if (asprintf(&arg, "--skip-compress=%s", skip_compress) < 0)
2658                                 goto oom;
2659                         args[ac++] = arg;
2660                 }
2661         }
2662
2663         /* --delete-missing-args needs the cooperation of both sides, but
2664          * the sender can handle --ignore-missing-args by itself. */
2665         if (missing_args == 2)
2666                 args[ac++] = "--delete-missing-args";
2667         else if (missing_args == 1 && !am_sender)
2668                 args[ac++] = "--ignore-missing-args";
2669
2670         if (modify_window_set && am_sender) {
2671                 char *fmt = modify_window < 0 ? "-@%d" : "--modify-window=%d";
2672                 if (asprintf(&arg, fmt, modify_window) < 0)
2673                         goto oom;
2674                 args[ac++] = arg;
2675         }
2676
2677         if (checksum_seed) {
2678                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
2679                         goto oom;
2680                 args[ac++] = arg;
2681         }
2682
2683         if (partial_dir && am_sender) {
2684                 if (partial_dir != tmp_partialdir) {
2685                         args[ac++] = "--partial-dir";
2686                         args[ac++] = partial_dir;
2687                 }
2688                 if (delay_updates)
2689                         args[ac++] = "--delay-updates";
2690         } else if (keep_partial && am_sender)
2691                 args[ac++] = "--partial";
2692
2693         if (ignore_errors)
2694                 args[ac++] = "--ignore-errors";
2695
2696         if (copy_unsafe_links)
2697                 args[ac++] = "--copy-unsafe-links";
2698
2699         if (safe_symlinks)
2700                 args[ac++] = "--safe-links";
2701
2702         if (numeric_ids)
2703                 args[ac++] = "--numeric-ids";
2704
2705         if (use_qsort)
2706                 args[ac++] = "--use-qsort";
2707
2708         if (am_sender) {
2709                 if (usermap) {
2710                         if (asprintf(&arg, "--usermap=%s", usermap) < 0)
2711                                 goto oom;
2712                         args[ac++] = arg;
2713                 }
2714
2715                 if (groupmap) {
2716                         if (asprintf(&arg, "--groupmap=%s", groupmap) < 0)
2717                                 goto oom;
2718                         args[ac++] = arg;
2719                 }
2720
2721                 if (ignore_existing)
2722                         args[ac++] = "--ignore-existing";
2723
2724                 /* Backward compatibility: send --existing, not --ignore-non-existing. */
2725                 if (ignore_non_existing)
2726                         args[ac++] = "--existing";
2727
2728                 if (tmpdir) {
2729                         args[ac++] = "--temp-dir";
2730                         args[ac++] = tmpdir;
2731                 }
2732
2733                 if (basis_dir[0]) {
2734                         /* the server only needs this option if it is not the sender,
2735                          *   and it may be an older version that doesn't know this
2736                          *   option, so don't send it if client is the sender.
2737                          */
2738                         for (i = 0; i < basis_dir_cnt; i++) {
2739                                 args[ac++] = dest_option;
2740                                 args[ac++] = basis_dir[i];
2741                         }
2742                 }
2743         }
2744
2745         /* What flags do we need to send to the other side? */
2746         where = (am_server ? W_CLI : W_SRV) | (am_sender ? W_REC : W_SND);
2747         arg = make_output_option(info_words, info_levels, where);
2748         if (arg)
2749                 args[ac++] = arg;
2750
2751         arg = make_output_option(debug_words, debug_levels, where);
2752         if (arg)
2753                 args[ac++] = arg;
2754
2755         if (append_mode) {
2756                 if (append_mode > 1)
2757                         args[ac++] = "--append";
2758                 args[ac++] = "--append";
2759         } else if (inplace)
2760                 args[ac++] = "--inplace";
2761
2762         if (files_from && (!am_sender || filesfrom_host)) {
2763                 if (filesfrom_host) {
2764                         args[ac++] = "--files-from";
2765                         args[ac++] = files_from;
2766                         if (eol_nulls)
2767                                 args[ac++] = "--from0";
2768                 } else {
2769                         args[ac++] = "--files-from=-";
2770                         args[ac++] = "--from0";
2771                 }
2772                 if (!relative_paths)
2773                         args[ac++] = "--no-relative";
2774         }
2775         /* It's OK that this checks the upper-bound of the protocol_version. */
2776         if (relative_paths && !implied_dirs && (!am_sender || protocol_version >= 30))
2777                 args[ac++] = "--no-implied-dirs";
2778
2779         if (remove_source_files == 1)
2780                 args[ac++] = "--remove-source-files";
2781         else if (remove_source_files)
2782                 args[ac++] = "--remove-sent-files";
2783
2784         if (preallocate_files && am_sender)
2785                 args[ac++] = "--preallocate";
2786
2787         if (ac > MAX_SERVER_ARGS) { /* Not possible... */
2788                 rprintf(FERROR, "argc overflow in server_options().\n");
2789                 exit_cleanup(RERR_MALLOC);
2790         }
2791
2792         if (do_compression > 1)
2793                 args[ac++] = "--new-compress";
2794
2795         if (remote_option_cnt) {
2796                 int j;
2797                 if (ac + remote_option_cnt > MAX_SERVER_ARGS) {
2798                         rprintf(FERROR, "too many remote options specified.\n");
2799                         exit_cleanup(RERR_SYNTAX);
2800                 }
2801                 for (j = 1; j <= remote_option_cnt; j++)
2802                         args[ac++] = (char*)remote_options[j];
2803         }
2804
2805         *argc_p = ac;
2806         return;
2807
2808     oom:
2809         out_of_memory("server_options");
2810 }
2811
2812 /* If str points to a valid hostspec, return allocated memory containing the
2813  * [USER@]HOST part of the string, and set the path_start_ptr to the part of
2814  * the string after the host part.  Otherwise, return NULL.  If port_ptr is
2815  * non-NULL, we must be parsing an rsync:// URL hostname, and we will set
2816  * *port_ptr if a port number is found.  Note that IPv6 IPs will have their
2817  * (required for parsing) [ and ] chars elided from the returned string. */
2818 static char *parse_hostspec(char *str, char **path_start_ptr, int *port_ptr)
2819 {
2820         char *s, *host_start = str;
2821         int hostlen = 0, userlen = 0;
2822         char *ret;
2823
2824         for (s = str; ; s++) {
2825                 if (!*s) {
2826                         /* It is only OK if we run out of string with rsync:// */
2827                         if (!port_ptr)
2828                                 return NULL;
2829                         if (!hostlen)
2830                                 hostlen = s - host_start;
2831                         break;
2832                 }
2833                 if (*s == ':' || *s == '/') {
2834                         if (!hostlen)
2835                                 hostlen = s - host_start;
2836                         if (*s++ == '/') {
2837                                 if (!port_ptr)
2838                                         return NULL;
2839                         } else if (port_ptr) {
2840                                 *port_ptr = atoi(s);
2841                                 while (isDigit(s)) s++;
2842                                 if (*s && *s++ != '/')
2843                                         return NULL;
2844                         }
2845                         break;
2846                 }
2847                 if (*s == '@') {
2848                         userlen = s - str + 1;
2849                         host_start = s + 1;
2850                 } else if (*s == '[') {
2851                         if (s != host_start++)
2852                                 return NULL;
2853                         while (*s && *s != ']' && *s != '/') s++; /*SHARED ITERATOR*/
2854                         hostlen = s - host_start;
2855                         if (*s != ']' || (s[1] && s[1] != '/' && s[1] != ':') || !hostlen)
2856                                 return NULL;
2857                 }
2858         }
2859
2860         *path_start_ptr = s;
2861         ret = new_array(char, userlen + hostlen + 1);
2862         if (userlen)
2863                 strlcpy(ret, str, userlen + 1);
2864         strlcpy(ret + userlen, host_start, hostlen + 1);
2865         return ret;
2866 }
2867
2868 /* Look for a HOST specfication of the form "HOST:PATH", "HOST::PATH", or
2869  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
2870  * memory with the HOST.  If a daemon-accessing spec was specified, the value
2871  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
2872  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
2873  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
2874  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
2875 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
2876 {
2877         char *path;
2878
2879         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
2880                 *host_ptr = parse_hostspec(s + strlen(URL_PREFIX), &path, port_ptr);
2881                 if (*host_ptr) {
2882                         if (!*port_ptr)
2883                                 *port_ptr = RSYNC_PORT;
2884                         return path;
2885                 }
2886         }
2887
2888         *host_ptr = parse_hostspec(s, &path, NULL);
2889         if (!*host_ptr)
2890                 return NULL;
2891
2892         if (*path == ':') {
2893                 if (port_ptr && !*port_ptr)
2894                         *port_ptr = RSYNC_PORT;
2895                 return path + 1;
2896         }
2897         if (port_ptr)
2898                 *port_ptr = 0;
2899
2900         return path;
2901 }