Tweak --checksum-seed docs.
[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) 2002-2013 Wayne Davison
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 3 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License along
19  * with this program; if not, visit the http://fsf.org website.
20  */
21
22 #include "rsync.h"
23 #include "itypes.h"
24 #include <popt.h>
25 #include <zlib.h>
26
27 extern int module_id;
28 extern int local_server;
29 extern int sanitize_paths;
30 extern int daemon_over_rsh;
31 extern unsigned int module_dirlen;
32 extern filter_rule_list filter_list;
33 extern filter_rule_list daemon_filter_list;
34
35 int make_backups = 0;
36
37 /**
38  * If 1, send the whole file as literal data rather than trying to
39  * create an incremental diff.
40  *
41  * If -1, then look at whether we're local or remote and go by that.
42  *
43  * @sa disable_deltas_p()
44  **/
45 int whole_file = -1;
46
47 int append_mode = 0;
48 int keep_dirlinks = 0;
49 int copy_dirlinks = 0;
50 int copy_links = 0;
51 int preserve_links = 0;
52 int preserve_hard_links = 0;
53 int preserve_acls = 0;
54 int preserve_xattrs = 0;
55 int preserve_perms = 0;
56 int preserve_executability = 0;
57 int preserve_devices = 0;
58 int preserve_specials = 0;
59 int preserve_uid = 0;
60 int preserve_gid = 0;
61 int preserve_times = 0;
62 int update_only = 0;
63 int cvs_exclude = 0;
64 int dry_run = 0;
65 int do_xfers = 1;
66 int ignore_times = 0;
67 int delete_mode = 0;
68 int delete_during = 0;
69 int delete_before = 0;
70 int delete_after = 0;
71 int delete_excluded = 0;
72 int remove_source_files = 0;
73 int one_file_system = 0;
74 int protocol_version = PROTOCOL_VERSION;
75 int sparse_files = 0;
76 int preallocate_files = 0;
77 int do_compression = 0;
78 int def_compress_level = Z_DEFAULT_COMPRESSION;
79 int am_root = 0; /* 0 = normal, 1 = root, 2 = --super, -1 = --fake-super */
80 int am_server = 0;
81 int am_sender = 0;
82 int am_starting_up = 1;
83 int relative_paths = -1;
84 int implied_dirs = 1;
85 int missing_args = 0; /* 0 = FERROR_XFER, 1 = ignore, 2 = delete */
86 int numeric_ids = 0;
87 int msgs2stderr = 0;
88 int allow_8bit_chars = 0;
89 int force_delete = 0;
90 int io_timeout = 0;
91 int prune_empty_dirs = 0;
92 int use_qsort = 0;
93 char *files_from = NULL;
94 int filesfrom_fd = -1;
95 char *filesfrom_host = NULL;
96 int eol_nulls = 0;
97 int protect_args = -1;
98 int human_readable = 1;
99 int recurse = 0;
100 int allow_inc_recurse = 1;
101 int xfer_dirs = -1;
102 int am_daemon = 0;
103 int connect_timeout = 0;
104 int keep_partial = 0;
105 int safe_symlinks = 0;
106 int copy_unsafe_links = 0;
107 int munge_symlinks = 0;
108 int size_only = 0;
109 int daemon_bwlimit = 0;
110 int bwlimit = 0;
111 int fuzzy_basis = 0;
112 size_t bwlimit_writemax = 0;
113 int ignore_existing = 0;
114 int ignore_non_existing = 0;
115 int need_messages_from_generator = 0;
116 int max_delete = INT_MIN;
117 OFF_T max_size = -1;
118 OFF_T min_size = -1;
119 int ignore_errors = 0;
120 int modify_window = 0;
121 int blocking_io = -1;
122 int checksum_seed = 0;
123 int inplace = 0;
124 int delay_updates = 0;
125 long block_size = 0; /* "long" because popt can't set an int32. */
126 char number_separator;
127 char *skip_compress = NULL;
128 item_list dparam_list = EMPTY_ITEM_LIST;
129
130 /** Network address family. **/
131 int default_af_hint
132 #ifdef INET6
133         = 0;            /* Any protocol */
134 #else
135         = AF_INET;      /* Must use IPv4 */
136 # ifdef AF_INET6
137 #  undef AF_INET6
138 # endif
139 # define AF_INET6 AF_INET /* make -6 option a no-op */
140 #endif
141
142 /** Do not go into the background when run as --daemon.  Good
143  * for debugging and required for running as a service on W32,
144  * or under Unix process-monitors. **/
145 int no_detach
146 #if defined _WIN32 || defined __WIN32__
147         = 1;
148 #else
149         = 0;
150 #endif
151
152 int write_batch = 0;
153 int read_batch = 0;
154 int backup_dir_len = 0;
155 int backup_suffix_len;
156 unsigned int backup_dir_remainder;
157
158 char *backup_suffix = NULL;
159 char *tmpdir = NULL;
160 char *partial_dir = NULL;
161 char *basis_dir[MAX_BASIS_DIRS+1];
162 char *config_file = NULL;
163 char *shell_cmd = NULL;
164 char *logfile_name = NULL;
165 char *logfile_format = NULL;
166 char *stdout_format = NULL;
167 char *password_file = NULL;
168 char *rsync_path = RSYNC_PATH;
169 char *backup_dir = NULL;
170 char backup_dir_buf[MAXPATHLEN];
171 char *sockopts = NULL;
172 char *usermap = NULL;
173 char *groupmap = NULL;
174 int rsync_port = 0;
175 int compare_dest = 0;
176 int copy_dest = 0;
177 int link_dest = 0;
178 int basis_dir_cnt = 0;
179 char *dest_option = NULL;
180
181 static int remote_option_alloc = 0;
182 int remote_option_cnt = 0;
183 const char **remote_options = NULL;
184
185 int quiet = 0;
186 int output_motd = 1;
187 int log_before_transfer = 0;
188 int stdout_format_has_i = 0;
189 int stdout_format_has_o_or_i = 0;
190 int logfile_format_has_i = 0;
191 int logfile_format_has_o_or_i = 0;
192 int always_checksum = 0;
193 int list_only = 0;
194
195 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
196 char *batch_name = NULL;
197
198 int need_unsorted_flist = 0;
199 #ifdef ICONV_OPTION
200 char *iconv_opt = ICONV_OPTION;
201 #endif
202
203 struct chmod_mode_struct *chmod_modes = NULL;
204
205 static const char *debug_verbosity[] = {
206         /*0*/ NULL,
207         /*1*/ NULL,
208         /*2*/ "BIND,CMD,CONNECT,DEL,DELTASUM,DUP,FILTER,FLIST,ICONV",
209         /*3*/ "ACL,BACKUP,CONNECT2,DELTASUM2,DEL2,EXIT,FILTER2,FLIST2,FUZZY,GENR,OWN,RECV,SEND,TIME",
210         /*4*/ "CMD2,DELTASUM3,DEL3,EXIT2,FLIST3,ICONV2,OWN2,PROTO,TIME2",
211         /*5*/ "CHDIR,DELTASUM4,FLIST4,FUZZY2,HASH,HLINK",
212 };
213
214 #define MAX_VERBOSITY ((int)(sizeof debug_verbosity / sizeof debug_verbosity[0]) - 1)
215
216 static const char *info_verbosity[1+MAX_VERBOSITY] = {
217         /*0*/ NULL,
218         /*1*/ "COPY,DEL,FLIST,MISC,NAME,STATS,SYMSAFE",
219         /*2*/ "BACKUP,MISC2,MOUNT,NAME2,REMOVE,SKIP",
220 };
221
222 #define MAX_OUT_LEVEL 4 /* The largest N allowed for any flagN word. */
223
224 short info_levels[COUNT_INFO], debug_levels[COUNT_DEBUG];
225
226 #define DEFAULT_PRIORITY 0      /* Default/implied/--verbose set values. */
227 #define HELP_PRIORITY 1         /* The help output uses this level. */
228 #define USER_PRIORITY 2         /* User-specified via --info or --debug */
229 #define LIMIT_PRIORITY 3        /* Overriding priority when limiting values. */
230
231 #define W_CLI (1<<0)    /* client side */
232 #define W_SRV (1<<1)    /* server side */
233 #define W_SND (1<<2)    /* sending side */
234 #define W_REC (1<<3)    /* receiving side */
235
236 struct output_struct {
237         char *name;     /* The name of the info/debug flag. */
238         char *help;     /* The description of the info/debug flag. */
239         uchar namelen;  /* The length of the name string. */
240         uchar flag;     /* The flag's value, for consistency check. */
241         uchar where;    /* Bits indicating where the flag is used. */
242         uchar priority; /* See *_PRIORITY defines. */
243 };
244
245 #define INFO_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, INFO_##flag, where, 0 }
246
247 static struct output_struct info_words[COUNT_INFO+1] = {
248         INFO_WORD(BACKUP, W_REC, "Mention files backed up"),
249         INFO_WORD(COPY, W_REC, "Mention files copied locally on the receiving side"),
250         INFO_WORD(DEL, W_REC, "Mention deletions on the receiving side"),
251         INFO_WORD(FLIST, W_CLI, "Mention file-list receiving/sending (levels 1-2)"),
252         INFO_WORD(MISC, W_SND|W_REC, "Mention miscellaneous information (levels 1-2)"),
253         INFO_WORD(MOUNT, W_SND|W_REC, "Mention mounts that were found or skipped"),
254         INFO_WORD(NAME, W_SND|W_REC, "Mention 1) updated file/dir names, 2) unchanged names"),
255         INFO_WORD(PROGRESS, W_CLI, "Mention 1) per-file progress or 2) total transfer progress"),
256         INFO_WORD(REMOVE, W_SND, "Mention files removed on the sending side"),
257         INFO_WORD(SKIP, W_REC, "Mention files that are skipped due to options used"),
258         INFO_WORD(STATS, W_CLI|W_SRV, "Mention statistics at end of run (levels 1-3)"),
259         INFO_WORD(SYMSAFE, W_SND|W_REC, "Mention symlinks that are unsafe"),
260         { NULL, "--info", 0, 0, 0, 0 }
261 };
262
263 #define DEBUG_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, DEBUG_##flag, where, 0 }
264
265 static struct output_struct debug_words[COUNT_DEBUG+1] = {
266         DEBUG_WORD(ACL, W_SND|W_REC, "Debug extra ACL info"),
267         DEBUG_WORD(BACKUP, W_REC, "Debug backup actions (levels 1-2)"),
268         DEBUG_WORD(BIND, W_CLI, "Debug socket bind actions"),
269         DEBUG_WORD(CHDIR, W_CLI|W_SRV, "Debug when the current directory changes"),
270         DEBUG_WORD(CONNECT, W_CLI, "Debug connection events (levels 1-2)"),
271         DEBUG_WORD(CMD, W_CLI, "Debug commands+options that are issued (levels 1-2)"),
272         DEBUG_WORD(DEL, W_REC, "Debug delete actions (levels 1-3)"),
273         DEBUG_WORD(DELTASUM, W_SND|W_REC, "Debug delta-transfer checksumming (levels 1-4)"),
274         DEBUG_WORD(DUP, W_REC, "Debug weeding of duplicate names"),
275         DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-3)"),
276         DEBUG_WORD(FILTER, W_SND|W_REC, "Debug filter actions (levels 1-2)"),
277         DEBUG_WORD(FLIST, W_SND|W_REC, "Debug file-list operations (levels 1-4)"),
278         DEBUG_WORD(FUZZY, W_REC, "Debug fuzzy scoring (levels 1-2)"),
279         DEBUG_WORD(GENR, W_REC, "Debug generator functions"),
280         DEBUG_WORD(HASH, W_SND|W_REC, "Debug hashtable code"),
281         DEBUG_WORD(HLINK, W_SND|W_REC, "Debug hard-link actions (levels 1-3)"),
282         DEBUG_WORD(ICONV, W_CLI|W_SRV, "Debug iconv character conversions (levels 1-2)"),
283         DEBUG_WORD(IO, W_CLI|W_SRV, "Debug I/O routines (levels 1-4)"),
284         DEBUG_WORD(OWN, W_REC, "Debug ownership changes in users & groups (levels 1-2)"),
285         DEBUG_WORD(PROTO, W_CLI|W_SRV, "Debug protocol information"),
286         DEBUG_WORD(RECV, W_REC, "Debug receiver functions"),
287         DEBUG_WORD(SEND, W_SND, "Debug sender functions"),
288         DEBUG_WORD(TIME, W_REC, "Debug setting of modified times (levels 1-2)"),
289         { NULL, "--debug", 0, 0, 0, 0 }
290 };
291
292 static int verbose = 0;
293 static int do_stats = 0;
294 static int do_progress = 0;
295 static int daemon_opt;   /* sets am_daemon after option error-reporting */
296 static int omit_dir_times = 0;
297 static int omit_link_times = 0;
298 static int F_option_cnt = 0;
299 static int modify_window_set;
300 static int itemize_changes = 0;
301 static int refused_delete, refused_archive_part, refused_compress;
302 static int refused_partial, refused_progress, refused_delete_before;
303 static int refused_delete_during;
304 static int refused_inplace, refused_no_iconv;
305 static BOOL usermap_via_chown, groupmap_via_chown;
306 #ifdef HAVE_SETVBUF
307 static char *outbuf_mode;
308 #endif
309 static char *bwlimit_arg, *max_size_arg, *min_size_arg;
310 static char tmp_partialdir[] = ".~tmp~";
311
312 /** Local address to bind.  As a character string because it's
313  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
314  * address, or a hostname. **/
315 char *bind_address;
316
317 static void output_item_help(struct output_struct *words);
318
319 /* This constructs a string that represents all the options set for either
320  * the --info or --debug setting, skipping any implied options (by -v, etc.).
321  * This is used both when conveying the user's options to the server, and
322  * when the help output wants to tell the user what options are implied. */
323 static char *make_output_option(struct output_struct *words, short *levels, uchar where)
324 {
325         char *str = words == info_words ? "--info=" : "--debug=";
326         int j, counts[MAX_OUT_LEVEL+1], pos, skipped = 0, len = 0, max = 0, lev = 0;
327         int word_count = words == info_words ? COUNT_INFO : COUNT_DEBUG;
328         char *buf;
329
330         memset(counts, 0, sizeof counts);
331
332         for (j = 0; words[j].name; j++) {
333                 if (words[j].flag != j) {
334                         rprintf(FERROR, "rsync: internal error on %s%s: %d != %d\n",
335                                 words == info_words ? "INFO_" : "DEBUG_",
336                                 words[j].name, words[j].flag, j);
337                         exit_cleanup(RERR_UNSUPPORTED);
338                 }
339                 if (!(words[j].where & where))
340                         continue;
341                 if (words[j].priority == DEFAULT_PRIORITY) {
342                         /* Implied items don't need to be mentioned. */
343                         skipped++;
344                         continue;
345                 }
346                 len += len ? 1 : strlen(str);
347                 len += strlen(words[j].name);
348                 len += levels[j] == 1 ? 0 : 1;
349
350                 if (words[j].priority == HELP_PRIORITY)
351                         continue; /* no abbreviating for help */
352
353                 assert(levels[j] <= MAX_OUT_LEVEL);
354                 if (++counts[levels[j]] > max) {
355                         /* Determine which level has the most items. */
356                         lev = levels[j];
357                         max = counts[lev];
358                 }
359         }
360
361         /* Sanity check the COUNT_* define against the length of the table. */
362         if (j != word_count) {
363                 rprintf(FERROR, "rsync: internal error: %s is wrong! (%d != %d)\n",
364                         words == info_words ? "COUNT_INFO" : "COUNT_DEBUG",
365                         j, word_count);
366                 exit_cleanup(RERR_UNSUPPORTED);
367         }
368
369         if (!len)
370                 return NULL;
371
372         len++;
373         if (!(buf = new_array(char, len)))
374                 out_of_memory("make_output_option");
375         pos = 0;
376
377         if (skipped || max < 5)
378                 lev = -1;
379         else {
380                 if (lev == 0)
381                         pos += snprintf(buf, len, "%sNONE", str);
382                 else if (lev == 1)
383                         pos += snprintf(buf, len, "%sALL", str);
384                 else
385                         pos += snprintf(buf, len, "%sALL%d", str, lev);
386         }
387
388         for (j = 0; words[j].name && pos < len; j++) {
389                 if (words[j].priority == DEFAULT_PRIORITY || levels[j] == lev || !(words[j].where & where))
390                         continue;
391                 if (pos)
392                         buf[pos++] = ',';
393                 else
394                         pos += strlcpy(buf+pos, str, len-pos);
395                 if (pos < len)
396                         pos += strlcpy(buf+pos, words[j].name, len-pos);
397                 /* Level 1 is implied by the name alone. */
398                 if (levels[j] != 1 && pos < len)
399                         buf[pos++] = '0' + levels[j];
400         }
401
402         buf[pos] = '\0';
403
404         return buf;
405 }
406
407 static void parse_output_words(struct output_struct *words, short *levels,
408                                const char *str, uchar priority)
409 {
410         const char *s;
411         int j, len, lev;
412
413         if (!str)
414                 return;
415
416         while (*str) {
417                 if ((s = strchr(str, ',')) != NULL)
418                         len = s++ - str;
419                 else
420                         len = strlen(str);
421                 while (len && isDigit(str+len-1))
422                         len--;
423                 lev = isDigit(str+len) ? atoi(str+len) : 1;
424                 if (lev > MAX_OUT_LEVEL)
425                         lev = MAX_OUT_LEVEL;
426                 if (len == 4 && strncasecmp(str, "help", 4) == 0) {
427                         output_item_help(words);
428                         exit_cleanup(0);
429                 }
430                 if (len == 4 && strncasecmp(str, "none", 4) == 0)
431                         len = lev = 0;
432                 else if (len == 3 && strncasecmp(str, "all", 3) == 0)
433                         len = 0;
434                 for (j = 0; words[j].name; j++) {
435                         if (!len
436                          || (len == words[j].namelen && strncasecmp(str, words[j].name, len) == 0)) {
437                                 if (priority >= words[j].priority) {
438                                         words[j].priority = priority;
439                                         levels[j] = lev;
440                                 }
441                                 if (len)
442                                         break;
443                         }
444                 }
445                 if (len && !words[j].name) {
446                         rprintf(FERROR, "Unknown %s item: \"%.*s\"\n",
447                                 words[j].help, len, str);
448                         exit_cleanup(RERR_SYNTAX);
449                 }
450                 if (!s)
451                         break;
452                 str = s;
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) 1996-2013 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," -x, --one-file-system       don't cross filesystem boundaries\n");
726   rprintf(F," -B, --block-size=SIZE       force a fixed checksum block-size\n");
727   rprintf(F," -e, --rsh=COMMAND           specify the remote shell to use\n");
728   rprintf(F,"     --rsync-path=PROGRAM    specify the rsync to run on the remote machine\n");
729   rprintf(F,"     --existing              skip creating new files on receiver\n");
730   rprintf(F,"     --ignore-existing       skip updating files that already exist on receiver\n");
731   rprintf(F,"     --remove-source-files   sender removes synchronized files (non-dirs)\n");
732   rprintf(F,"     --del                   an alias for --delete-during\n");
733   rprintf(F,"     --delete                delete extraneous files from destination dirs\n");
734   rprintf(F,"     --delete-before         receiver deletes before transfer, not during\n");
735   rprintf(F,"     --delete-during         receiver deletes during the transfer\n");
736   rprintf(F,"     --delete-delay          find deletions during, delete after\n");
737   rprintf(F,"     --delete-after          receiver deletes after transfer, not during\n");
738   rprintf(F,"     --delete-excluded       also delete excluded files from destination dirs\n");
739   rprintf(F,"     --ignore-missing-args   ignore missing source args without error\n");
740   rprintf(F,"     --delete-missing-args   delete missing source args from destination\n");
741   rprintf(F,"     --ignore-errors         delete even if there are I/O errors\n");
742   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
743   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
744   rprintf(F,"     --max-size=SIZE         don't transfer any file larger than SIZE\n");
745   rprintf(F,"     --min-size=SIZE         don't transfer any file smaller than SIZE\n");
746   rprintf(F,"     --partial               keep partially transferred files\n");
747   rprintf(F,"     --partial-dir=DIR       put a partially transferred file into DIR\n");
748   rprintf(F,"     --delay-updates         put all updated files into place at transfer's end\n");
749   rprintf(F," -m, --prune-empty-dirs      prune empty directory chains from the file-list\n");
750   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
751   rprintf(F,"     --usermap=STRING        custom username mapping\n");
752   rprintf(F,"     --groupmap=STRING       custom groupname mapping\n");
753   rprintf(F,"     --chown=USER:GROUP      simple username/groupname mapping\n");
754   rprintf(F,"     --timeout=SECONDS       set I/O timeout in seconds\n");
755   rprintf(F,"     --contimeout=SECONDS    set daemon connection timeout in seconds\n");
756   rprintf(F," -I, --ignore-times          don't skip files that match in size and mod-time\n");
757   rprintf(F," -M, --remote-option=OPTION  send OPTION to the remote side only\n");
758   rprintf(F,"     --size-only             skip files that match in size\n");
759   rprintf(F,"     --modify-window=NUM     compare mod-times with reduced accuracy\n");
760   rprintf(F," -T, --temp-dir=DIR          create temporary files in directory DIR\n");
761   rprintf(F," -y, --fuzzy                 find similar file for basis if no dest file\n");
762   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
763   rprintf(F,"     --copy-dest=DIR         ... and include copies of unchanged files\n");
764   rprintf(F,"     --link-dest=DIR         hardlink to files in DIR when unchanged\n");
765   rprintf(F," -z, --compress              compress file data during the transfer\n");
766   rprintf(F,"     --compress-level=NUM    explicitly set compression level\n");
767   rprintf(F,"     --skip-compress=LIST    skip compressing files with a suffix in LIST\n");
768   rprintf(F," -C, --cvs-exclude           auto-ignore files the same way CVS does\n");
769   rprintf(F," -f, --filter=RULE           add a file-filtering RULE\n");
770   rprintf(F," -F                          same as --filter='dir-merge /.rsync-filter'\n");
771   rprintf(F,"                             repeated: --filter='- .rsync-filter'\n");
772   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
773   rprintf(F,"     --exclude-from=FILE     read exclude patterns from FILE\n");
774   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
775   rprintf(F,"     --include-from=FILE     read include patterns from FILE\n");
776   rprintf(F,"     --files-from=FILE       read list of source-file names from FILE\n");
777   rprintf(F," -0, --from0                 all *-from/filter files are delimited by 0s\n");
778   rprintf(F," -s, --protect-args          no space-splitting; only wildcard special-chars\n");
779   rprintf(F,"     --address=ADDRESS       bind address for outgoing socket to daemon\n");
780   rprintf(F,"     --port=PORT             specify double-colon alternate port number\n");
781   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
782   rprintf(F,"     --blocking-io           use blocking I/O for the remote shell\n");
783   rprintf(F,"     --stats                 give some file-transfer stats\n");
784   rprintf(F," -8, --8-bit-output          leave high-bit chars unescaped in output\n");
785   rprintf(F," -h, --human-readable        output numbers in a human-readable format\n");
786   rprintf(F,"     --progress              show progress during transfer\n");
787   rprintf(F," -P                          same as --partial --progress\n");
788   rprintf(F," -i, --itemize-changes       output a change-summary for all updates\n");
789   rprintf(F,"     --out-format=FORMAT     output updates using the specified FORMAT\n");
790   rprintf(F,"     --log-file=FILE         log what we're doing to the specified FILE\n");
791   rprintf(F,"     --log-file-format=FMT   log updates using the specified FMT\n");
792   rprintf(F,"     --password-file=FILE    read daemon-access password from FILE\n");
793   rprintf(F,"     --list-only             list the files instead of copying them\n");
794   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
795 #ifdef HAVE_SETVBUF
796   rprintf(F,"     --outbuf=N|L|B          set output buffering to None, Line, or Block\n");
797 #endif
798   rprintf(F,"     --write-batch=FILE      write a batched update to FILE\n");
799   rprintf(F,"     --only-write-batch=FILE like --write-batch but w/o updating destination\n");
800   rprintf(F,"     --read-batch=FILE       read a batched update from FILE\n");
801   rprintf(F,"     --protocol=NUM          force an older protocol version to be used\n");
802 #ifdef ICONV_OPTION
803   rprintf(F,"     --iconv=CONVERT_SPEC    request charset conversion of filenames\n");
804 #endif
805   rprintf(F,"     --checksum-seed=NUM     set block/file checksum seed (advanced)\n");
806   rprintf(F," -4, --ipv4                  prefer IPv4\n");
807   rprintf(F," -6, --ipv6                  prefer IPv6\n");
808   rprintf(F,"     --version               print version number\n");
809   rprintf(F,"(-h) --help                  show this help (-h is --help only if used alone)\n");
810
811   rprintf(F,"\n");
812   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
813   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
814   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
815 }
816
817 enum {OPT_VERSION = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
818       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
819       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
820       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
821       OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, OPT_INFO, OPT_DEBUG,
822       OPT_USERMAP, OPT_GROUPMAP, OPT_CHOWN, OPT_BWLIMIT,
823       OPT_SERVER, OPT_REFUSED_BASE = 9000};
824
825 static struct poptOption long_options[] = {
826   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
827   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
828   {"version",          0,  POPT_ARG_NONE,   0, OPT_VERSION, 0, 0},
829   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
830   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
831   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
832   {"info",             0,  POPT_ARG_STRING, 0, OPT_INFO, 0, 0 },
833   {"debug",            0,  POPT_ARG_STRING, 0, OPT_DEBUG, 0, 0 },
834   {"msgs2stderr",      0,  POPT_ARG_NONE,   &msgs2stderr, 0, 0, 0 },
835   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
836   {"motd",             0,  POPT_ARG_VAL,    &output_motd, 1, 0, 0 },
837   {"no-motd",          0,  POPT_ARG_VAL,    &output_motd, 0, 0, 0 },
838   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
839   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
840   {"no-human-readable",0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
841   {"no-h",             0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
842   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
843   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
844   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
845   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
846   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
847   {"inc-recursive",    0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
848   {"no-inc-recursive", 0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
849   {"i-r",              0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
850   {"no-i-r",           0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
851   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
852   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
853   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
854   {"old-dirs",         0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
855   {"old-d",            0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
856   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
857   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
858   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
859   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
860   {"acls",            'A', POPT_ARG_NONE,   0, 'A', 0, 0 },
861   {"no-acls",          0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
862   {"no-A",             0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
863   {"xattrs",          'X', POPT_ARG_NONE,   0, 'X', 0, 0 },
864   {"no-xattrs",        0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
865   {"no-X",             0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
866   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
867   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
868   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
869   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 1, 0, 0 },
870   {"no-omit-dir-times",0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
871   {"no-O",             0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
872   {"omit-link-times", 'J', POPT_ARG_VAL,    &omit_link_times, 1, 0, 0 },
873   {"no-omit-link-times",0, POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
874   {"no-J",             0,  POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
875   {"modify-window",    0,  POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
876   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
877   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
878   {"fake-super",       0,  POPT_ARG_VAL,    &am_root, -1, 0, 0 },
879   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
880   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
881   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
882   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
883   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
884   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
885   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
886   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
887   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
888   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
889   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
890   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
891   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
892   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
893   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
894   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
895   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
896   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
897   {"munge-links",      0,  POPT_ARG_VAL,    &munge_symlinks, 1, 0, 0 },
898   {"no-munge-links",   0,  POPT_ARG_VAL,    &munge_symlinks, 0, 0, 0 },
899   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
900   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
901   {"hard-links",      'H', POPT_ARG_NONE,   0, 'H', 0, 0 },
902   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
903   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
904   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
905   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
906   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
907   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
908   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
909   {"i-d",              0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
910   {"no-i-d",           0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
911   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
912   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
913   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
914   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
915   {"no-one-file-system",0, POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
916   {"no-x",             0,  POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
917   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
918   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
919   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
920   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
921   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
922   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
923   {"sparse",          'S', POPT_ARG_VAL,    &sparse_files, 1, 0, 0 },
924   {"no-sparse",        0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
925   {"no-S",             0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
926   {"preallocate",      0,  POPT_ARG_NONE,   &preallocate_files, 0, 0, 0},
927   {"inplace",          0,  POPT_ARG_VAL,    &inplace, 1, 0, 0 },
928   {"no-inplace",       0,  POPT_ARG_VAL,    &inplace, 0, 0, 0 },
929   {"append",           0,  POPT_ARG_NONE,   0, OPT_APPEND, 0, 0 },
930   {"append-verify",    0,  POPT_ARG_VAL,    &append_mode, 2, 0, 0 },
931   {"no-append",        0,  POPT_ARG_VAL,    &append_mode, 0, 0, 0 },
932   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
933   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
934   {"delete-before",    0,  POPT_ARG_NONE,   &delete_before, 0, 0, 0 },
935   {"delete-during",    0,  POPT_ARG_VAL,    &delete_during, 1, 0, 0 },
936   {"delete-delay",     0,  POPT_ARG_VAL,    &delete_during, 2, 0, 0 },
937   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
938   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
939   {"delete-missing-args",0,POPT_BIT_SET,    &missing_args, 2, 0, 0 },
940   {"ignore-missing-args",0,POPT_BIT_SET,    &missing_args, 1, 0, 0 },
941   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_source_files, 2, 0, 0 }, /* deprecated */
942   {"remove-source-files",0,POPT_ARG_VAL,    &remove_source_files, 1, 0, 0 },
943   {"force",            0,  POPT_ARG_VAL,    &force_delete, 1, 0, 0 },
944   {"no-force",         0,  POPT_ARG_VAL,    &force_delete, 0, 0, 0 },
945   {"ignore-errors",    0,  POPT_ARG_VAL,    &ignore_errors, 1, 0, 0 },
946   {"no-ignore-errors", 0,  POPT_ARG_VAL,    &ignore_errors, 0, 0, 0 },
947   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
948   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
949   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
950   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
951   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
952   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
953   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
954   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
955   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
956   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
957   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
958   {"checksum",        'c', POPT_ARG_VAL,    &always_checksum, 1, 0, 0 },
959   {"no-checksum",      0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
960   {"no-c",             0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
961   {"block-size",      'B', POPT_ARG_LONG,   &block_size, 0, 0, 0 },
962   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
963   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
964   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
965   {"fuzzy",           'y', POPT_ARG_NONE,   0, 'y', 0, 0 },
966   {"no-fuzzy",         0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
967   {"no-y",             0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
968   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
969   {"no-compress",      0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
970   {"no-z",             0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
971   {"skip-compress",    0,  POPT_ARG_STRING, &skip_compress, 0, 0, 0 },
972   {"compress-level",   0,  POPT_ARG_INT,    &def_compress_level, 'z', 0, 0 },
973   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
974   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
975   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
976   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
977   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
978   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
979   {"delay-updates",    0,  POPT_ARG_VAL,    &delay_updates, 1, 0, 0 },
980   {"no-delay-updates", 0,  POPT_ARG_VAL,    &delay_updates, 0, 0, 0 },
981   {"prune-empty-dirs",'m', POPT_ARG_VAL,    &prune_empty_dirs, 1, 0, 0 },
982   {"no-prune-empty-dirs",0,POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
983   {"no-m",             0,  POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
984   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
985   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
986   {"out-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 },
987   {"log-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 }, /* DEPRECATED */
988   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
989   {"no-itemize-changes",0, POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
990   {"no-i",             0,  POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
991   {"bwlimit",          0,  POPT_ARG_STRING, &bwlimit_arg, OPT_BWLIMIT, 0, 0 },
992   {"no-bwlimit",       0,  POPT_ARG_VAL,    &bwlimit, 0, 0, 0 },
993   {"backup",          'b', POPT_ARG_VAL,    &make_backups, 1, 0, 0 },
994   {"no-backup",        0,  POPT_ARG_VAL,    &make_backups, 0, 0, 0 },
995   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
996   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
997   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
998   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
999   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
1000   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
1001   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
1002   {"from0",           '0', POPT_ARG_VAL,    &eol_nulls, 1, 0, 0},
1003   {"no-from0",         0,  POPT_ARG_VAL,    &eol_nulls, 0, 0, 0},
1004   {"protect-args",    's', POPT_ARG_VAL,    &protect_args, 1, 0, 0},
1005   {"no-protect-args",  0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1006   {"no-s",             0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1007   {"numeric-ids",      0,  POPT_ARG_VAL,    &numeric_ids, 1, 0, 0 },
1008   {"no-numeric-ids",   0,  POPT_ARG_VAL,    &numeric_ids, 0, 0, 0 },
1009   {"usermap",          0,  POPT_ARG_STRING, 0, OPT_USERMAP, 0, 0 },
1010   {"groupmap",         0,  POPT_ARG_STRING, 0, OPT_GROUPMAP, 0, 0 },
1011   {"chown",            0,  POPT_ARG_STRING, 0, OPT_CHOWN, 0, 0 },
1012   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
1013   {"no-timeout",       0,  POPT_ARG_VAL,    &io_timeout, 0, 0, 0 },
1014   {"contimeout",       0,  POPT_ARG_INT,    &connect_timeout, 0, 0, 0 },
1015   {"no-contimeout",    0,  POPT_ARG_VAL,    &connect_timeout, 0, 0, 0 },
1016   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
1017   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
1018   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1019 #ifdef ICONV_OPTION
1020   {"iconv",            0,  POPT_ARG_STRING, &iconv_opt, 0, 0, 0 },
1021   {"no-iconv",         0,  POPT_ARG_NONE,   0, OPT_NO_ICONV, 0, 0 },
1022 #endif
1023   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1024   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1025   {"8-bit-output",    '8', POPT_ARG_VAL,    &allow_8bit_chars, 1, 0, 0 },
1026   {"no-8-bit-output",  0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1027   {"no-8",             0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1028   {"qsort",            0,  POPT_ARG_NONE,   &use_qsort, 0, 0, 0 },
1029   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1030   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1031   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1032   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
1033   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
1034   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
1035 #ifdef HAVE_SETVBUF
1036   {"outbuf",           0,  POPT_ARG_STRING, &outbuf_mode, 0, 0, 0 },
1037 #endif
1038   {"remote-option",   'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1039   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1040   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
1041   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
1042   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
1043   /* All the following options switch us into daemon-mode option-parsing. */
1044   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1045   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1046   {"dparam",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1047   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1048   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1049   {0,0,0,0, 0, 0, 0}
1050 };
1051
1052 static void daemon_usage(enum logcode F)
1053 {
1054   print_rsync_version(F);
1055
1056   rprintf(F,"\n");
1057   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
1058   rprintf(F,"     --address=ADDRESS       bind to the specified address\n");
1059   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
1060   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
1061   rprintf(F," -M, --dparam=OVERRIDE       override global daemon config parameter\n");
1062   rprintf(F,"     --no-detach             do not detach from the parent\n");
1063   rprintf(F,"     --port=PORT             listen on alternate port number\n");
1064   rprintf(F,"     --log-file=FILE         override the \"log file\" setting\n");
1065   rprintf(F,"     --log-file-format=FMT   override the \"log format\" setting\n");
1066   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
1067   rprintf(F," -v, --verbose               increase verbosity\n");
1068   rprintf(F," -4, --ipv4                  prefer IPv4\n");
1069   rprintf(F," -6, --ipv6                  prefer IPv6\n");
1070   rprintf(F,"     --help                  show this help screen\n");
1071
1072   rprintf(F,"\n");
1073   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
1074   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
1075 }
1076
1077 static struct poptOption long_daemon_options[] = {
1078   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
1079   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1080   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
1081   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
1082   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
1083   {"dparam",          'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1084   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1085   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1086   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
1087   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
1088   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
1089   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
1090   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1091   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1092   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1093   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
1094   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1095   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
1096   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1097   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1098   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
1099   {0,0,0,0, 0, 0, 0}
1100 };
1101
1102
1103 static char err_buf[200];
1104
1105
1106 /**
1107  * Store the option error message, if any, so that we can log the
1108  * connection attempt (which requires parsing the options), and then
1109  * show the error later on.
1110  **/
1111 void option_error(void)
1112 {
1113         if (!err_buf[0]) {
1114                 strlcpy(err_buf, "Error parsing options: option may "
1115                         "be supported on client but not on server?\n",
1116                         sizeof err_buf);
1117         }
1118
1119         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
1120         msleep(20);
1121 }
1122
1123
1124 /**
1125  * Tweak the option table to disable all options that the rsyncd.conf
1126  * file has told us to refuse.
1127  **/
1128 static void set_refuse_options(char *bp)
1129 {
1130         struct poptOption *op;
1131         char *cp, shortname[2];
1132         int is_wild, found_match;
1133
1134         shortname[1] = '\0';
1135
1136         while (1) {
1137                 while (*bp == ' ') bp++;
1138                 if (!*bp)
1139                         break;
1140                 if ((cp = strchr(bp, ' ')) != NULL)
1141                         *cp= '\0';
1142                 is_wild = strpbrk(bp, "*?[") != NULL;
1143                 found_match = 0;
1144                 for (op = long_options; ; op++) {
1145                         *shortname = op->shortName;
1146                         if (!op->longName && !*shortname)
1147                                 break;
1148                         if ((op->longName && wildmatch(bp, op->longName))
1149                             || (*shortname && wildmatch(bp, shortname))) {
1150                                 if (op->argInfo == POPT_ARG_VAL)
1151                                         op->argInfo = POPT_ARG_NONE;
1152                                 op->val = (op - long_options) + OPT_REFUSED_BASE;
1153                                 found_match = 1;
1154                                 /* These flags are set to let us easily check
1155                                  * an implied option later in the code. */
1156                                 switch (*shortname) {
1157                                 case 'r': case 'd': case 'l': case 'p':
1158                                 case 't': case 'g': case 'o': case 'D':
1159                                         refused_archive_part = op->val;
1160                                         break;
1161                                 case 'z':
1162                                         refused_compress = op->val;
1163                                         break;
1164                                 case '\0':
1165                                         if (wildmatch("delete", op->longName))
1166                                                 refused_delete = op->val;
1167                                         else if (wildmatch("delete-before", op->longName))
1168                                                 refused_delete_before = op->val;
1169                                         else if (wildmatch("delete-during", op->longName))
1170                                                 refused_delete_during = op->val;
1171                                         else if (wildmatch("partial", op->longName))
1172                                                 refused_partial = op->val;
1173                                         else if (wildmatch("progress", op->longName))
1174                                                 refused_progress = op->val;
1175                                         else if (wildmatch("inplace", op->longName))
1176                                                 refused_inplace = op->val;
1177                                         else if (wildmatch("no-iconv", op->longName))
1178                                                 refused_no_iconv = op->val;
1179                                         break;
1180                                 }
1181                                 if (!is_wild)
1182                                         break;
1183                         }
1184                 }
1185                 if (!found_match) {
1186                         rprintf(FLOG, "No match for refuse-options string \"%s\"\n",
1187                                 bp);
1188                 }
1189                 if (!cp)
1190                         break;
1191                 *cp = ' ';
1192                 bp = cp + 1;
1193         }
1194 }
1195
1196
1197 static int count_args(const char **argv)
1198 {
1199         int i = 0;
1200
1201         if (argv) {
1202                 while (argv[i] != NULL)
1203                         i++;
1204         }
1205
1206         return i;
1207 }
1208
1209
1210 static OFF_T parse_size_arg(char **size_arg, char def_suf)
1211 {
1212         int reps, mult, make_compatible = 0;
1213         const char *arg;
1214         OFF_T size = 1;
1215
1216         for (arg = *size_arg; isDigit(arg); arg++) {}
1217         if (*arg == '.')
1218                 for (arg++; isDigit(arg); arg++) {}
1219         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
1220         case 'b': case 'B':
1221                 reps = 0;
1222                 break;
1223         case 'k': case 'K':
1224                 reps = 1;
1225                 break;
1226         case 'm': case 'M':
1227                 reps = 2;
1228                 break;
1229         case 'g': case 'G':
1230                 reps = 3;
1231                 break;
1232         default:
1233                 return -1;
1234         }
1235         if (*arg == 'b' || *arg == 'B')
1236                 mult = 1000, make_compatible = 1, arg++;
1237         else if (!*arg || *arg == '+' || *arg == '-')
1238                 mult = 1024;
1239         else if (strncasecmp(arg, "ib", 2) == 0)
1240                 mult = 1024, arg += 2;
1241         else
1242                 return -1;
1243         while (reps--)
1244                 size *= mult;
1245         size *= atof(*size_arg);
1246         if ((*arg == '+' || *arg == '-') && arg[1] == '1')
1247                 size += atoi(arg), make_compatible = 1, arg += 2;
1248         if (*arg)
1249                 return -1;
1250         if (size > 0 && make_compatible && def_suf == 'b') {
1251                 /* We convert this manually because we may need %lld precision,
1252                  * and that's not a portable sprintf() escape. */
1253                 char buf[128], *s = buf + sizeof buf - 1;
1254                 OFF_T num = size;
1255                 *s = '\0';
1256                 while (num) {
1257                         *--s = (char)(num % 10) + '0';
1258                         num /= 10;
1259                 }
1260                 if (!(*size_arg = strdup(s)))
1261                         out_of_memory("parse_size_arg");
1262         }
1263         return size;
1264 }
1265
1266
1267 static void create_refuse_error(int which)
1268 {
1269         /* The "which" value is the index + OPT_REFUSED_BASE. */
1270         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
1271         int n = snprintf(err_buf, sizeof err_buf,
1272                          "The server is configured to refuse --%s\n",
1273                          op->longName) - 1;
1274         if (op->shortName) {
1275                 snprintf(err_buf + n, sizeof err_buf - n,
1276                          " (-%c)\n", op->shortName);
1277         }
1278 }
1279
1280
1281 /**
1282  * Process command line arguments.  Called on both local and remote.
1283  *
1284  * @retval 1 if all options are OK; with globals set to appropriate
1285  * values
1286  *
1287  * @retval 0 on error, with err_buf containing an explanation
1288  **/
1289 int parse_arguments(int *argc_p, const char ***argv_p)
1290 {
1291         static poptContext pc;
1292         char *ref = lp_refuse_options(module_id);
1293         const char *arg, **argv = *argv_p;
1294         int argc = *argc_p;
1295         int opt;
1296
1297         if (ref && *ref)
1298                 set_refuse_options(ref);
1299         if (am_daemon) {
1300                 set_refuse_options("log-file*");
1301 #ifdef ICONV_OPTION
1302                 if (!*lp_charset(module_id))
1303                         set_refuse_options("iconv");
1304 #endif
1305         }
1306
1307 #ifdef ICONV_OPTION
1308         if (!am_daemon && protect_args <= 0 && (arg = getenv("RSYNC_ICONV")) != NULL && *arg)
1309                 iconv_opt = strdup(arg);
1310 #endif
1311
1312         /* TODO: Call poptReadDefaultConfig; handle errors. */
1313
1314         /* The context leaks in case of an error, but if there's a
1315          * problem we always exit anyhow. */
1316         if (pc)
1317                 poptFreeContext(pc);
1318         pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1319         if (!am_server)
1320                 poptReadDefaultConfig(pc, 0);
1321
1322         while ((opt = poptGetNextOpt(pc)) != -1) {
1323                 /* most options are handled automatically by popt;
1324                  * only special cases are returned and listed here. */
1325
1326                 switch (opt) {
1327                 case OPT_VERSION:
1328                         print_rsync_version(FINFO);
1329                         exit_cleanup(0);
1330
1331                 case OPT_SERVER:
1332                         if (!am_server) {
1333                                 /* Disable popt aliases on the server side and
1334                                  * then start parsing the options again. */
1335                                 poptFreeContext(pc);
1336                                 pc = poptGetContext(RSYNC_NAME, argc, argv,
1337                                                     long_options, 0);
1338                                 am_server = 1;
1339                         }
1340 #ifdef ICONV_OPTION
1341                         iconv_opt = NULL;
1342 #endif
1343                         break;
1344
1345                 case OPT_SENDER:
1346                         if (!am_server) {
1347                                 usage(FERROR);
1348                                 exit_cleanup(RERR_SYNTAX);
1349                         }
1350                         am_sender = 1;
1351                         break;
1352
1353                 case OPT_DAEMON:
1354                         if (am_daemon) {
1355                                 strlcpy(err_buf,
1356                                         "Attempt to hack rsync thwarted!\n",
1357                                         sizeof err_buf);
1358                                 return 0;
1359                         }
1360 #ifdef ICONV_OPTION
1361                         iconv_opt = NULL;
1362 #endif
1363                         protect_args = 0;
1364                         poptFreeContext(pc);
1365                         pc = poptGetContext(RSYNC_NAME, argc, argv,
1366                                             long_daemon_options, 0);
1367                         while ((opt = poptGetNextOpt(pc)) != -1) {
1368                                 char **cpp;
1369                                 switch (opt) {
1370                                 case 'h':
1371                                         daemon_usage(FINFO);
1372                                         exit_cleanup(0);
1373
1374                                 case 'M':
1375                                         arg = poptGetOptArg(pc);
1376                                         if (!strchr(arg, '=')) {
1377                                                 rprintf(FERROR,
1378                                                     "--dparam value is missing an '=': %s\n",
1379                                                     arg);
1380                                                 goto daemon_error;
1381                                         }
1382                                         cpp = EXPAND_ITEM_LIST(&dparam_list, char *, 4);
1383                                         *cpp = strdup(arg);
1384                                         break;
1385
1386                                 case 'v':
1387                                         verbose++;
1388                                         break;
1389
1390                                 default:
1391                                         rprintf(FERROR,
1392                                             "rsync: %s: %s (in daemon mode)\n",
1393                                             poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1394                                             poptStrerror(opt));
1395                                         goto daemon_error;
1396                                 }
1397                         }
1398
1399                         if (dparam_list.count && !set_dparams(1))
1400                                 exit_cleanup(RERR_SYNTAX);
1401
1402                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1403                                 snprintf(err_buf, sizeof err_buf,
1404                                          "the --temp-dir path is WAY too long.\n");
1405                                 return 0;
1406                         }
1407
1408                         if (!daemon_opt) {
1409                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
1410                             daemon_error:
1411                                 rprintf(FERROR,
1412                                     "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
1413                                 exit_cleanup(RERR_SYNTAX);
1414                         }
1415
1416                         *argv_p = argv = poptGetArgs(pc);
1417                         *argc_p = argc = count_args(argv);
1418                         am_starting_up = 0;
1419                         daemon_opt = 0;
1420                         am_daemon = 1;
1421                         return 1;
1422
1423                 case OPT_MODIFY_WINDOW:
1424                         /* The value has already been set by popt, but
1425                          * we need to remember that we're using a
1426                          * non-default setting. */
1427                         modify_window_set = 1;
1428                         break;
1429
1430                 case OPT_FILTER:
1431                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1432                                         rule_template(0), 0);
1433                         break;
1434
1435                 case OPT_EXCLUDE:
1436                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1437                                         rule_template(0), XFLG_OLD_PREFIXES);
1438                         break;
1439
1440                 case OPT_INCLUDE:
1441                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1442                                         rule_template(FILTRULE_INCLUDE), XFLG_OLD_PREFIXES);
1443                         break;
1444
1445                 case OPT_EXCLUDE_FROM:
1446                 case OPT_INCLUDE_FROM:
1447                         arg = poptGetOptArg(pc);
1448                         if (sanitize_paths)
1449                                 arg = sanitize_path(NULL, arg, NULL, 0, SP_DEFAULT);
1450                         if (daemon_filter_list.head) {
1451                                 int rej;
1452                                 char *cp = strdup(arg);
1453                                 if (!cp)
1454                                         out_of_memory("parse_arguments");
1455                                 if (!*cp)
1456                                         rej = 1;
1457                                 else {
1458                                         char *dir = cp + (*cp == '/' ? module_dirlen : 0);
1459                                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1460                                         rej = check_filter(&daemon_filter_list, FLOG, dir, 0) < 0;
1461                                 }
1462                                 free(cp);
1463                                 if (rej)
1464                                         goto options_rejected;
1465                         }
1466                         parse_filter_file(&filter_list, arg,
1467                                 rule_template(opt == OPT_INCLUDE_FROM ? FILTRULE_INCLUDE : 0),
1468                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
1469                         break;
1470
1471                 case 'a':
1472                         if (refused_archive_part) {
1473                                 create_refuse_error(refused_archive_part);
1474                                 return 0;
1475                         }
1476                         if (!recurse) /* preserve recurse == 2 */
1477                                 recurse = 1;
1478 #ifdef SUPPORT_LINKS
1479                         preserve_links = 1;
1480 #endif
1481                         preserve_perms = 1;
1482                         preserve_times = 1;
1483                         preserve_gid = 1;
1484                         preserve_uid = 1;
1485                         preserve_devices = 1;
1486                         preserve_specials = 1;
1487                         break;
1488
1489                 case 'D':
1490                         preserve_devices = preserve_specials = 1;
1491                         break;
1492
1493                 case OPT_NO_D:
1494                         preserve_devices = preserve_specials = 0;
1495                         break;
1496
1497                 case 'h':
1498                         human_readable++;
1499                         break;
1500
1501                 case 'H':
1502                         preserve_hard_links++;
1503                         break;
1504
1505                 case 'i':
1506                         itemize_changes++;
1507                         break;
1508
1509                 case 'v':
1510                         verbose++;
1511                         break;
1512
1513                 case 'y':
1514                         fuzzy_basis++;
1515                         break;
1516
1517                 case 'q':
1518                         quiet++;
1519                         break;
1520
1521                 case 'x':
1522                         one_file_system++;
1523                         break;
1524
1525                 case 'F':
1526                         switch (++F_option_cnt) {
1527                         case 1:
1528                                 parse_filter_str(&filter_list,": /.rsync-filter",rule_template(0),0);
1529                                 break;
1530                         case 2:
1531                                 parse_filter_str(&filter_list,"- .rsync-filter",rule_template(0),0);
1532                                 break;
1533                         }
1534                         break;
1535
1536                 case 'P':
1537                         if (refused_partial || refused_progress) {
1538                                 create_refuse_error(refused_partial
1539                                     ? refused_partial : refused_progress);
1540                                 return 0;
1541                         }
1542                         do_progress = 1;
1543                         keep_partial = 1;
1544                         break;
1545
1546                 case 'z':
1547                         if (def_compress_level < Z_DEFAULT_COMPRESSION
1548                          || def_compress_level > Z_BEST_COMPRESSION) {
1549                                 snprintf(err_buf, sizeof err_buf,
1550                                         "--compress-level value is invalid: %d\n",
1551                                         def_compress_level);
1552                                 return 0;
1553                         }
1554                         do_compression = def_compress_level != Z_NO_COMPRESSION;
1555                         if (do_compression && refused_compress) {
1556                                 create_refuse_error(refused_compress);
1557                                 return 0;
1558                         }
1559                         break;
1560
1561                 case 'M':
1562                         arg = poptGetOptArg(pc);
1563                         if (*arg != '-') {
1564                                 snprintf(err_buf, sizeof err_buf,
1565                                         "Remote option must start with a dash: %s\n", arg);
1566                                 return 0;
1567                         }
1568                         if (remote_option_cnt+2 >= remote_option_alloc) {
1569                                 remote_option_alloc += 16;
1570                                 remote_options = realloc_array(remote_options,
1571                                                         const char *, remote_option_alloc);
1572                                 if (!remote_options)
1573                                         out_of_memory("parse_arguments");
1574                                 if (!remote_option_cnt)
1575                                         remote_options[0] = "ARG0";
1576                         }
1577                         remote_options[++remote_option_cnt] = arg;
1578                         remote_options[remote_option_cnt+1] = NULL;
1579                         break;
1580
1581                 case OPT_WRITE_BATCH:
1582                         /* batch_name is already set */
1583                         write_batch = 1;
1584                         break;
1585
1586                 case OPT_ONLY_WRITE_BATCH:
1587                         /* batch_name is already set */
1588                         write_batch = -1;
1589                         break;
1590
1591                 case OPT_READ_BATCH:
1592                         /* batch_name is already set */
1593                         read_batch = 1;
1594                         break;
1595
1596                 case OPT_NO_ICONV:
1597 #ifdef ICONV_OPTION
1598                         iconv_opt = NULL;
1599 #endif
1600                         break;
1601
1602                 case OPT_MAX_SIZE:
1603                         if ((max_size = parse_size_arg(&max_size_arg, 'b')) < 0) {
1604                                 snprintf(err_buf, sizeof err_buf,
1605                                         "--max-size value is invalid: %s\n",
1606                                         max_size_arg);
1607                                 return 0;
1608                         }
1609                         break;
1610
1611                 case OPT_MIN_SIZE:
1612                         if ((min_size = parse_size_arg(&min_size_arg, 'b')) < 0) {
1613                                 snprintf(err_buf, sizeof err_buf,
1614                                         "--min-size value is invalid: %s\n",
1615                                         min_size_arg);
1616                                 return 0;
1617                         }
1618                         break;
1619
1620                 case OPT_BWLIMIT:
1621                         {
1622                                 OFF_T limit = parse_size_arg(&bwlimit_arg, 'K');
1623                                 if (limit < 0) {
1624                                         snprintf(err_buf, sizeof err_buf,
1625                                                 "--bwlimit value is invalid: %s\n", bwlimit_arg);
1626                                         return 0;
1627                                 }
1628                                 bwlimit = (limit + 512) / 1024;
1629                                 if (limit && !bwlimit) {
1630                                         snprintf(err_buf, sizeof err_buf,
1631                                                 "--bwlimit value is too small: %s\n", bwlimit_arg);
1632                                         return 0;
1633                                 }
1634                         }
1635                         break;
1636
1637                 case OPT_APPEND:
1638                         if (am_server)
1639                                 append_mode++;
1640                         else
1641                                 append_mode = 1;
1642                         break;
1643
1644                 case OPT_LINK_DEST:
1645 #ifdef SUPPORT_HARD_LINKS
1646                         link_dest = 1;
1647                         dest_option = "--link-dest";
1648                         goto set_dest_dir;
1649 #else
1650                         snprintf(err_buf, sizeof err_buf,
1651                                  "hard links are not supported on this %s\n",
1652                                  am_server ? "server" : "client");
1653                         return 0;
1654 #endif
1655
1656                 case OPT_COPY_DEST:
1657                         copy_dest = 1;
1658                         dest_option = "--copy-dest";
1659                         goto set_dest_dir;
1660
1661                 case OPT_COMPARE_DEST:
1662                         compare_dest = 1;
1663                         dest_option = "--compare-dest";
1664                 set_dest_dir:
1665                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1666                                 snprintf(err_buf, sizeof err_buf,
1667                                         "ERROR: at most %d %s args may be specified\n",
1668                                         MAX_BASIS_DIRS, dest_option);
1669                                 return 0;
1670                         }
1671                         /* We defer sanitizing this arg until we know what
1672                          * our destination directory is going to be. */
1673                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1674                         break;
1675
1676                 case OPT_CHMOD:
1677                         arg = poptGetOptArg(pc);
1678                         if (!parse_chmod(arg, &chmod_modes)) {
1679                                 snprintf(err_buf, sizeof err_buf,
1680                                     "Invalid argument passed to --chmod (%s)\n",
1681                                     arg);
1682                                 return 0;
1683                         }
1684                         break;
1685
1686                 case OPT_INFO:
1687                         arg = poptGetOptArg(pc);
1688                         parse_output_words(info_words, info_levels, arg, USER_PRIORITY);
1689                         break;
1690
1691                 case OPT_DEBUG:
1692                         arg = poptGetOptArg(pc);
1693                         parse_output_words(debug_words, debug_levels, arg, USER_PRIORITY);
1694                         break;
1695
1696                 case OPT_USERMAP:
1697                         if (usermap) {
1698                                 if (usermap_via_chown) {
1699                                         snprintf(err_buf, sizeof err_buf,
1700                                             "--usermap conflicts with prior --chown.\n");
1701                                         return 0;
1702                                 }
1703                                 snprintf(err_buf, sizeof err_buf,
1704                                     "You can only specify --usermap once.\n");
1705                                 return 0;
1706                         }
1707                         usermap = (char *)poptGetOptArg(pc);
1708                         usermap_via_chown = False;
1709                         break;
1710
1711                 case OPT_GROUPMAP:
1712                         if (groupmap) {
1713                                 if (groupmap_via_chown) {
1714                                         snprintf(err_buf, sizeof err_buf,
1715                                             "--groupmap conflicts with prior --chown.\n");
1716                                         return 0;
1717                                 }
1718                                 snprintf(err_buf, sizeof err_buf,
1719                                     "You can only specify --groupmap once.\n");
1720                                 return 0;
1721                         }
1722                         groupmap = (char *)poptGetOptArg(pc);
1723                         groupmap_via_chown = False;
1724                         break;
1725
1726                 case OPT_CHOWN: {
1727                         const char *chown = poptGetOptArg(pc);
1728                         int len;
1729                         if ((arg = strchr(chown, ':')) != NULL)
1730                                 len = arg++ - chown;
1731                         else
1732                                 len = strlen(chown);
1733                         if (len) {
1734                                 if (usermap) {
1735                                         if (!usermap_via_chown) {
1736                                                 snprintf(err_buf, sizeof err_buf,
1737                                                     "--chown conflicts with prior --usermap.\n");
1738                                                 return 0;
1739                                         }
1740                                         snprintf(err_buf, sizeof err_buf,
1741                                             "You can only specify a user-affecting --chown once.\n");
1742                                         return 0;
1743                                 }
1744                                 if (asprintf(&usermap, "*:%.*s", len, chown) < 0)
1745                                         out_of_memory("parse_arguments");
1746                                 usermap_via_chown = True;
1747                         }
1748                         if (arg && *arg) {
1749                                 if (groupmap) {
1750                                         if (!groupmap_via_chown) {
1751                                                 snprintf(err_buf, sizeof err_buf,
1752                                                     "--chown conflicts with prior --groupmap.\n");
1753                                                 return 0;
1754                                         }
1755                                         snprintf(err_buf, sizeof err_buf,
1756                                             "You can only specify a group-affecting --chown once.\n");
1757                                         return 0;
1758                                 }
1759                                 if (asprintf(&groupmap, "*:%s", arg) < 0)
1760                                         out_of_memory("parse_arguments");
1761                                 groupmap_via_chown = True;
1762                         }
1763                         break;
1764                 }
1765
1766                 case OPT_HELP:
1767                         usage(FINFO);
1768                         exit_cleanup(0);
1769
1770                 case 'A':
1771 #ifdef SUPPORT_ACLS
1772                         preserve_acls = 1;
1773                         preserve_perms = 1;
1774                         break;
1775 #else
1776                         /* FIXME: this should probably be ignored with a
1777                          * warning and then countermeasures taken to
1778                          * restrict group and other access in the presence
1779                          * of any more restrictive ACLs, but this is safe
1780                          * for now */
1781                         snprintf(err_buf,sizeof(err_buf),
1782                                  "ACLs are not supported on this %s\n",
1783                                  am_server ? "server" : "client");
1784                         return 0;
1785 #endif
1786
1787                 case 'X':
1788 #ifdef SUPPORT_XATTRS
1789                         preserve_xattrs++;
1790                         break;
1791 #else
1792                         snprintf(err_buf,sizeof(err_buf),
1793                                  "extended attributes are not supported on this %s\n",
1794                                  am_server ? "server" : "client");
1795                         return 0;
1796 #endif
1797
1798                 default:
1799                         /* A large opt value means that set_refuse_options()
1800                          * turned this option off. */
1801                         if (opt >= OPT_REFUSED_BASE) {
1802                                 create_refuse_error(opt);
1803                                 return 0;
1804                         }
1805                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
1806                                  am_server ? "on remote machine: " : "",
1807                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1808                                  poptStrerror(opt));
1809                         return 0;
1810                 }
1811         }
1812
1813         if (protect_args < 0) {
1814                 if (am_server)
1815                         protect_args = 0;
1816                 else if ((arg = getenv("RSYNC_PROTECT_ARGS")) != NULL && *arg)
1817                         protect_args = atoi(arg) ? 1 : 0;
1818                 else {
1819 #ifdef RSYNC_USE_PROTECTED_ARGS
1820                         protect_args = 1;
1821 #else
1822                         protect_args = 0;
1823 #endif
1824                 }
1825         }
1826
1827         if (human_readable > 1 && argc == 2 && !am_server) {
1828                 /* Allow the old meaning of 'h' (--help) on its own. */
1829                 usage(FINFO);
1830                 exit_cleanup(0);
1831         }
1832
1833 #ifdef HAVE_SETVBUF
1834         if (outbuf_mode && !am_server) {
1835                 int mode = *(uchar *)outbuf_mode;
1836                 if (islower(mode))
1837                         mode = toupper(mode);
1838                 fflush(stdout); /* Just in case... */
1839                 switch (mode) {
1840                 case 'N': /* None */
1841                 case 'U': /* Unbuffered */
1842                         mode = _IONBF;
1843                         break;
1844                 case 'L': /* Line */
1845                         mode = _IOLBF;
1846                         break;
1847                 case 'B': /* Block */
1848                 case 'F': /* Full */
1849                         mode = _IOFBF;
1850                         break;
1851                 default:
1852                         snprintf(err_buf, sizeof err_buf,
1853                                 "Invalid --outbuf setting -- specify N, L, or B.\n");
1854                         return 0;
1855                 }
1856                 setvbuf(stdout, (char *)NULL, mode, 0);
1857         }
1858
1859         if (msgs2stderr) {
1860                 /* Make stderr line buffered for better sharing of the stream. */
1861                 fflush(stderr); /* Just in case... */
1862                 setvbuf(stderr, (char *)NULL, _IOLBF, 0);
1863         }
1864 #endif
1865
1866         set_output_verbosity(verbose, DEFAULT_PRIORITY);
1867
1868         if (do_stats) {
1869                 parse_output_words(info_words, info_levels,
1870                         verbose > 1 ? "stats3" : "stats2", DEFAULT_PRIORITY);
1871         }
1872
1873         if (human_readable) {
1874                 char buf[32];
1875                 snprintf(buf, sizeof buf, "%f", 3.14);
1876                 if (strchr(buf, '.') != NULL)
1877                         number_separator = ',';
1878                 else
1879                         number_separator = '.';
1880         }
1881
1882 #ifdef ICONV_OPTION
1883         if (iconv_opt && protect_args != 2) {
1884                 if (!am_server && strcmp(iconv_opt, "-") == 0)
1885                         iconv_opt = NULL;
1886                 else
1887                         need_unsorted_flist = 1;
1888         }
1889         if (refused_no_iconv && !iconv_opt) {
1890                 create_refuse_error(refused_no_iconv);
1891                 return 0;
1892         }
1893 #endif
1894
1895         if (fuzzy_basis > 1)
1896                 fuzzy_basis = basis_dir_cnt + 1;
1897
1898         if (protect_args == 1 && am_server)
1899                 return 1;
1900
1901         *argv_p = argv = poptGetArgs(pc);
1902         *argc_p = argc = count_args(argv);
1903
1904 #ifndef SUPPORT_LINKS
1905         if (preserve_links && !am_sender) {
1906                 snprintf(err_buf, sizeof err_buf,
1907                          "symlinks are not supported on this %s\n",
1908                          am_server ? "server" : "client");
1909                 return 0;
1910         }
1911 #endif
1912
1913 #ifndef SUPPORT_HARD_LINKS
1914         if (preserve_hard_links) {
1915                 snprintf(err_buf, sizeof err_buf,
1916                          "hard links are not supported on this %s\n",
1917                          am_server ? "server" : "client");
1918                 return 0;
1919         }
1920 #endif
1921
1922 #ifdef SUPPORT_XATTRS
1923         if (am_root < 0 && preserve_xattrs > 1) {
1924                 snprintf(err_buf, sizeof err_buf,
1925                          "--fake-super conflicts with -XX\n");
1926                 return 0;
1927         }
1928 #else
1929         if (am_root < 0) {
1930                 snprintf(err_buf, sizeof err_buf,
1931                          "--fake-super requires an rsync with extended attributes enabled\n");
1932                 return 0;
1933         }
1934 #endif
1935
1936         if (block_size > MAX_BLOCK_SIZE) {
1937                 snprintf(err_buf, sizeof err_buf,
1938                          "--block-size=%lu is too large (max: %u)\n", block_size, MAX_BLOCK_SIZE);
1939                 return 0;
1940         }
1941
1942         if (write_batch && read_batch) {
1943                 snprintf(err_buf, sizeof err_buf,
1944                         "--write-batch and --read-batch can not be used together\n");
1945                 return 0;
1946         }
1947         if (write_batch > 0 || read_batch) {
1948                 if (am_server) {
1949                         rprintf(FINFO,
1950                                 "ignoring --%s-batch option sent to server\n",
1951                                 write_batch ? "write" : "read");
1952                         /* We don't actually exit_cleanup(), so that we can
1953                          * still service older version clients that still send
1954                          * batch args to server. */
1955                         read_batch = write_batch = 0;
1956                         batch_name = NULL;
1957                 } else if (dry_run)
1958                         write_batch = 0;
1959         } else if (write_batch < 0 && dry_run)
1960                 write_batch = 0;
1961         if (read_batch && files_from) {
1962                 snprintf(err_buf, sizeof err_buf,
1963                         "--read-batch cannot be used with --files-from\n");
1964                 return 0;
1965         }
1966         if (read_batch && remove_source_files) {
1967                 snprintf(err_buf, sizeof err_buf,
1968                         "--read-batch cannot be used with --remove-%s-files\n",
1969                         remove_source_files == 1 ? "source" : "sent");
1970                 return 0;
1971         }
1972         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
1973                 snprintf(err_buf, sizeof err_buf,
1974                         "the batch-file name must be %d characters or less.\n",
1975                         MAX_BATCH_NAME_LEN);
1976                 return 0;
1977         }
1978
1979         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1980                 snprintf(err_buf, sizeof err_buf,
1981                          "the --temp-dir path is WAY too long.\n");
1982                 return 0;
1983         }
1984
1985         if (max_delete < 0 && max_delete != INT_MIN) {
1986                 /* Negative numbers are treated as "no deletions". */
1987                 max_delete = 0;
1988         }
1989
1990         if (compare_dest + copy_dest + link_dest > 1) {
1991                 snprintf(err_buf, sizeof err_buf,
1992                         "You may not mix --compare-dest, --copy-dest, and --link-dest.\n");
1993                 return 0;
1994         }
1995
1996         if (files_from) {
1997                 if (recurse == 1) /* preserve recurse == 2 */
1998                         recurse = 0;
1999                 if (xfer_dirs < 0)
2000                         xfer_dirs = 1;
2001         }
2002
2003         if (argc < 2 && !read_batch && !am_server)
2004                 list_only |= 1;
2005
2006         if (xfer_dirs >= 4) {
2007                 parse_filter_str(&filter_list, "- /*/*", rule_template(0), 0);
2008                 recurse = xfer_dirs = 1;
2009         } else if (recurse)
2010                 xfer_dirs = 1;
2011         else if (xfer_dirs < 0)
2012                 xfer_dirs = list_only ? 1 : 0;
2013
2014         if (relative_paths < 0)
2015                 relative_paths = files_from? 1 : 0;
2016         if (!relative_paths)
2017                 implied_dirs = 0;
2018
2019         if (delete_before + !!delete_during + delete_after > 1) {
2020                 snprintf(err_buf, sizeof err_buf,
2021                         "You may not combine multiple --delete-WHEN options.\n");
2022                 return 0;
2023         }
2024         if (delete_before || delete_during || delete_after)
2025                 delete_mode = 1;
2026         else if (delete_mode || delete_excluded) {
2027                 /* Only choose now between before & during if one is refused. */
2028                 if (refused_delete_before) {
2029                         if (!refused_delete_during)
2030                                 delete_during = 1;
2031                         else {
2032                                 create_refuse_error(refused_delete_before);
2033                                 return 0;
2034                         }
2035                 } else if (refused_delete_during)
2036                         delete_before = 1;
2037                 delete_mode = 1;
2038         }
2039         if (!xfer_dirs && delete_mode) {
2040                 snprintf(err_buf, sizeof err_buf,
2041                         "--delete does not work without --recursive (-r) or --dirs (-d).\n");
2042                 return 0;
2043         }
2044
2045         if (missing_args == 3) /* simplify if both options were specified */
2046                 missing_args = 2;
2047         if (refused_delete && (delete_mode || missing_args == 2)) {
2048                 create_refuse_error(refused_delete);
2049                 return 0;
2050         }
2051
2052         if (remove_source_files) {
2053                 /* We only want to infer this refusal of --remove-source-files
2054                  * via the refusal of "delete", not any of the "delete-FOO"
2055                  * options. */
2056                 if (refused_delete && am_sender) {
2057                         create_refuse_error(refused_delete);
2058                         return 0;
2059                 }
2060                 need_messages_from_generator = 1;
2061         }
2062
2063         if (munge_symlinks && !am_daemon) {
2064                 STRUCT_STAT st;
2065                 char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */
2066                 strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */
2067                 if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) {
2068                         rprintf(FERROR, "Symlink munging is unsafe when a %s directory exists.\n",
2069                                 prefix);
2070                         exit_cleanup(RERR_UNSUPPORTED);
2071                 }
2072         }
2073
2074         if (sanitize_paths) {
2075                 int i;
2076                 for (i = argc; i-- > 0; )
2077                         argv[i] = sanitize_path(NULL, argv[i], "", 0, SP_KEEP_DOT_DIRS);
2078                 if (tmpdir)
2079                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, SP_DEFAULT);
2080                 if (backup_dir)
2081                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, SP_DEFAULT);
2082         }
2083         if (daemon_filter_list.head && !am_sender) {
2084                 filter_rule_list *elp = &daemon_filter_list;
2085                 if (tmpdir) {
2086                         char *dir;
2087                         if (!*tmpdir)
2088                                 goto options_rejected;
2089                         dir = tmpdir + (*tmpdir == '/' ? module_dirlen : 0);
2090                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2091                         if (check_filter(elp, FLOG, dir, 1) < 0)
2092                                 goto options_rejected;
2093                 }
2094                 if (backup_dir) {
2095                         char *dir;
2096                         if (!*backup_dir)
2097                                 goto options_rejected;
2098                         dir = backup_dir + (*backup_dir == '/' ? module_dirlen : 0);
2099                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2100                         if (check_filter(elp, FLOG, dir, 1) < 0)
2101                                 goto options_rejected;
2102                 }
2103         }
2104
2105         if (!backup_suffix)
2106                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
2107         backup_suffix_len = strlen(backup_suffix);
2108         if (strchr(backup_suffix, '/') != NULL) {
2109                 snprintf(err_buf, sizeof err_buf,
2110                         "--suffix cannot contain slashes: %s\n",
2111                         backup_suffix);
2112                 return 0;
2113         }
2114         if (backup_dir) {
2115                 size_t len;
2116                 while (*backup_dir == '.' && backup_dir[1] == '/')
2117                         backup_dir += 2;
2118                 if (*backup_dir == '.' && backup_dir[1] == '\0')
2119                         backup_dir++;
2120                 len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
2121                 if (len > sizeof backup_dir_buf - 128) {
2122                         snprintf(err_buf, sizeof err_buf,
2123                                 "the --backup-dir path is WAY too long.\n");
2124                         return 0;
2125                 }
2126                 backup_dir_len = (int)len;
2127                 if (!backup_dir_len) {
2128                         backup_dir_len = -1;
2129                         backup_dir = NULL;
2130                 } else if (backup_dir_buf[backup_dir_len - 1] != '/') {
2131                         backup_dir_buf[backup_dir_len++] = '/';
2132                         backup_dir_buf[backup_dir_len] = '\0';
2133                 }
2134                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
2135         }
2136         if (backup_dir) {
2137                 /* No need for a suffix or a protect rule. */
2138         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
2139                 snprintf(err_buf, sizeof err_buf,
2140                         "--suffix cannot be empty %s\n", backup_dir_len < 0
2141                         ? "when --backup-dir is the same as the dest dir"
2142                         : "without a --backup-dir");
2143                 return 0;
2144         } else if (make_backups && delete_mode && !delete_excluded && !am_server) {
2145                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
2146                         "P *%s", backup_suffix);
2147                 parse_filter_str(&filter_list, backup_dir_buf, rule_template(0), 0);
2148         }
2149
2150         if (preserve_times) {
2151                 preserve_times = PRESERVE_FILE_TIMES;
2152                 if (!omit_dir_times)
2153                         preserve_times |= PRESERVE_DIR_TIMES;
2154 #ifdef CAN_SET_SYMLINK_TIMES
2155                 if (!omit_link_times)
2156                         preserve_times |= PRESERVE_LINK_TIMES;
2157 #endif
2158         }
2159
2160         if (make_backups && !backup_dir) {
2161                 omit_dir_times = 0; /* Implied, so avoid -O to sender. */
2162                 preserve_times &= ~PRESERVE_DIR_TIMES;
2163         }
2164
2165         if (stdout_format) {
2166                 if (am_server && log_format_has(stdout_format, 'I'))
2167                         stdout_format_has_i = 2;
2168                 else if (log_format_has(stdout_format, 'i'))
2169                         stdout_format_has_i = itemize_changes | 1;
2170                 if (!log_format_has(stdout_format, 'b')
2171                  && !log_format_has(stdout_format, 'c')
2172                  && !log_format_has(stdout_format, 'C'))
2173                         log_before_transfer = !am_server;
2174         } else if (itemize_changes) {
2175                 stdout_format = "%i %n%L";
2176                 stdout_format_has_i = itemize_changes;
2177                 log_before_transfer = !am_server;
2178         }
2179
2180         if (do_progress && !am_server) {
2181                 if (!log_before_transfer && INFO_EQ(NAME, 0))
2182                         parse_output_words(info_words, info_levels, "name", DEFAULT_PRIORITY);
2183                 parse_output_words(info_words, info_levels, "flist2,progress", DEFAULT_PRIORITY);
2184         }
2185
2186         if (dry_run)
2187                 do_xfers = 0;
2188
2189         set_io_timeout(io_timeout);
2190
2191         if (INFO_GTE(NAME, 1) && !stdout_format) {
2192                 stdout_format = "%n%L";
2193                 log_before_transfer = !am_server;
2194         }
2195         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
2196                 stdout_format_has_o_or_i = 1;
2197
2198         if (logfile_name && !am_daemon) {
2199                 if (!logfile_format) {
2200                         logfile_format = "%i %n%L";
2201                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
2202                 } else {
2203                         if (log_format_has(logfile_format, 'i'))
2204                                 logfile_format_has_i = 1;
2205                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
2206                                 logfile_format_has_o_or_i = 1;
2207                 }
2208                 log_init(0);
2209         } else if (!am_daemon)
2210                 logfile_format = NULL;
2211
2212         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
2213                 bwlimit = daemon_bwlimit;
2214         if (bwlimit) {
2215                 bwlimit_writemax = (size_t)bwlimit * 128;
2216                 if (bwlimit_writemax < 512)
2217                         bwlimit_writemax = 512;
2218         }
2219
2220         if (sparse_files && inplace) {
2221                 /* Note: we don't check for this below, because --append is
2222                  * OK with --sparse (as long as redos are handled right). */
2223                 snprintf(err_buf, sizeof err_buf,
2224                          "--sparse cannot be used with --inplace\n");
2225                 return 0;
2226         }
2227
2228         if (append_mode) {
2229                 if (whole_file > 0) {
2230                         snprintf(err_buf, sizeof err_buf,
2231                                  "--append cannot be used with --whole-file\n");
2232                         return 0;
2233                 }
2234                 if (refused_inplace) {
2235                         create_refuse_error(refused_inplace);
2236                         return 0;
2237                 }
2238                 inplace = 1;
2239         }
2240
2241         if (delay_updates && !partial_dir)
2242                 partial_dir = tmp_partialdir;
2243
2244         if (inplace) {
2245 #ifdef HAVE_FTRUNCATE
2246                 if (partial_dir) {
2247                         snprintf(err_buf, sizeof err_buf,
2248                                  "--%s cannot be used with --%s\n",
2249                                  append_mode ? "append" : "inplace",
2250                                  delay_updates ? "delay-updates" : "partial-dir");
2251                         return 0;
2252                 }
2253                 /* --inplace implies --partial for refusal purposes, but we
2254                  * clear the keep_partial flag for internal logic purposes. */
2255                 if (refused_partial) {
2256                         create_refuse_error(refused_partial);
2257                         return 0;
2258                 }
2259                 keep_partial = 0;
2260 #else
2261                 snprintf(err_buf, sizeof err_buf,
2262                          "--%s is not supported on this %s\n",
2263                          append_mode ? "append" : "inplace",
2264                          am_server ? "server" : "client");
2265                 return 0;
2266 #endif
2267         } else {
2268                 if (keep_partial && !partial_dir && !am_server) {
2269                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
2270                                 partial_dir = strdup(arg);
2271                 }
2272                 if (partial_dir) {
2273                         if (*partial_dir)
2274                                 clean_fname(partial_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2275                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
2276                                 partial_dir = NULL;
2277                         if (!partial_dir && refused_partial) {
2278                                 create_refuse_error(refused_partial);
2279                                 return 0;
2280                         }
2281                         keep_partial = 1;
2282                 }
2283         }
2284
2285         if (files_from) {
2286                 char *h, *p;
2287                 int q;
2288                 if (argc > 2 || (!am_daemon && !am_server && argc == 1)) {
2289                         usage(FERROR);
2290                         exit_cleanup(RERR_SYNTAX);
2291                 }
2292                 if (strcmp(files_from, "-") == 0) {
2293                         filesfrom_fd = 0;
2294                         if (am_server)
2295                                 filesfrom_host = ""; /* reading from socket */
2296                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
2297                         if (am_server) {
2298                                 snprintf(err_buf, sizeof err_buf,
2299                                         "The --files-from sent to the server cannot specify a host.\n");
2300                                 return 0;
2301                         }
2302                         files_from = p;
2303                         filesfrom_host = h;
2304                         if (strcmp(files_from, "-") == 0) {
2305                                 snprintf(err_buf, sizeof err_buf,
2306                                         "Invalid --files-from remote filename\n");
2307                                 return 0;
2308                         }
2309                 } else {
2310                         if (sanitize_paths)
2311                                 files_from = sanitize_path(NULL, files_from, NULL, 0, SP_DEFAULT);
2312                         if (daemon_filter_list.head) {
2313                                 char *dir;
2314                                 if (!*files_from)
2315                                         goto options_rejected;
2316                                 dir = files_from + (*files_from == '/' ? module_dirlen : 0);
2317                                 clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2318                                 if (check_filter(&daemon_filter_list, FLOG, dir, 0) < 0)
2319                                         goto options_rejected;
2320                         }
2321                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
2322                         if (filesfrom_fd < 0) {
2323                                 snprintf(err_buf, sizeof err_buf,
2324                                         "failed to open files-from file %s: %s\n",
2325                                         files_from, strerror(errno));
2326                                 return 0;
2327                         }
2328                 }
2329         }
2330
2331         am_starting_up = 0;
2332
2333         return 1;
2334
2335   options_rejected:
2336         snprintf(err_buf, sizeof err_buf,
2337                 "Your options have been rejected by the server.\n");
2338         return 0;
2339 }
2340
2341
2342 /**
2343  * Construct a filtered list of options to pass through from the
2344  * client to the server.
2345  *
2346  * This involves setting options that will tell the server how to
2347  * behave, and also filtering out options that are processed only
2348  * locally.
2349  **/
2350 void server_options(char **args, int *argc_p)
2351 {
2352         static char argstr[64];
2353         int ac = *argc_p;
2354         uchar where;
2355         char *arg;
2356         int i, x;
2357
2358         /* This should always remain first on the server's command-line. */
2359         args[ac++] = "--server";
2360
2361         if (daemon_over_rsh > 0) {
2362                 args[ac++] = "--daemon";
2363                 *argc_p = ac;
2364                 /* if we're passing --daemon, we're done */
2365                 return;
2366         }
2367
2368         if (!am_sender)
2369                 args[ac++] = "--sender";
2370
2371         x = 1;
2372         argstr[0] = '-';
2373
2374         if (protect_args)
2375                 argstr[x++] = 's';
2376
2377         for (i = 0; i < verbose; i++)
2378                 argstr[x++] = 'v';
2379
2380         /* the -q option is intentionally left out */
2381         if (make_backups)
2382                 argstr[x++] = 'b';
2383         if (update_only)
2384                 argstr[x++] = 'u';
2385         if (!do_xfers) /* Note: NOT "dry_run"! */
2386                 argstr[x++] = 'n';
2387         if (preserve_links)
2388                 argstr[x++] = 'l';
2389         if ((xfer_dirs >= 2 && xfer_dirs < 4)
2390          || (xfer_dirs && !recurse && (list_only || (delete_mode && am_sender))))
2391                 argstr[x++] = 'd';
2392         if (am_sender) {
2393                 if (keep_dirlinks)
2394                         argstr[x++] = 'K';
2395                 if (prune_empty_dirs)
2396                         argstr[x++] = 'm';
2397                 if (omit_dir_times)
2398                         argstr[x++] = 'O';
2399                 if (omit_link_times)
2400                         argstr[x++] = 'J';
2401                 if (fuzzy_basis) {
2402                         argstr[x++] = 'y';
2403                         if (fuzzy_basis > 1)
2404                                 argstr[x++] = 'y';
2405                 }
2406         } else {
2407                 if (copy_links)
2408                         argstr[x++] = 'L';
2409                 if (copy_dirlinks)
2410                         argstr[x++] = 'k';
2411         }
2412
2413         if (whole_file > 0)
2414                 argstr[x++] = 'W';
2415         /* We don't need to send --no-whole-file, because it's the
2416          * default for remote transfers, and in any case old versions
2417          * of rsync will not understand it. */
2418
2419         if (preserve_hard_links) {
2420                 argstr[x++] = 'H';
2421                 if (preserve_hard_links > 1)
2422                         argstr[x++] = 'H';
2423         }
2424         if (preserve_uid)
2425                 argstr[x++] = 'o';
2426         if (preserve_gid)
2427                 argstr[x++] = 'g';
2428         if (preserve_devices) /* ignore preserve_specials here */
2429                 argstr[x++] = 'D';
2430         if (preserve_times)
2431                 argstr[x++] = 't';
2432         if (preserve_perms)
2433                 argstr[x++] = 'p';
2434         else if (preserve_executability && am_sender)
2435                 argstr[x++] = 'E';
2436 #ifdef SUPPORT_ACLS
2437         if (preserve_acls)
2438                 argstr[x++] = 'A';
2439 #endif
2440 #ifdef SUPPORT_XATTRS
2441         if (preserve_xattrs) {
2442                 argstr[x++] = 'X';
2443                 if (preserve_xattrs > 1)
2444                         argstr[x++] = 'X';
2445         }
2446 #endif
2447         if (recurse)
2448                 argstr[x++] = 'r';
2449         if (always_checksum)
2450                 argstr[x++] = 'c';
2451         if (cvs_exclude)
2452                 argstr[x++] = 'C';
2453         if (ignore_times)
2454                 argstr[x++] = 'I';
2455         if (relative_paths)
2456                 argstr[x++] = 'R';
2457         if (one_file_system) {
2458                 argstr[x++] = 'x';
2459                 if (one_file_system > 1)
2460                         argstr[x++] = 'x';
2461         }
2462         if (sparse_files)
2463                 argstr[x++] = 'S';
2464         if (do_compression)
2465                 argstr[x++] = 'z';
2466
2467         set_allow_inc_recurse();
2468
2469         /* Checking the pre-negotiated value allows --protocol=29 override. */
2470         if (protocol_version >= 30) {
2471                 /* We make use of the -e option to let the server know about
2472                  * any pre-release protocol version && some behavior flags. */
2473                 argstr[x++] = 'e';
2474 #if SUBPROTOCOL_VERSION != 0
2475                 if (protocol_version == PROTOCOL_VERSION) {
2476                         x += snprintf(argstr+x, sizeof argstr - x,
2477                                       "%d.%d",
2478                                       PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
2479                 } else
2480 #endif
2481                         argstr[x++] = '.';
2482                 if (allow_inc_recurse)
2483                         argstr[x++] = 'i';
2484 #ifdef CAN_SET_SYMLINK_TIMES
2485                 argstr[x++] = 'L';
2486 #endif
2487 #ifdef ICONV_OPTION
2488                 argstr[x++] = 's';
2489 #endif
2490         }
2491
2492         if (x >= (int)sizeof argstr) { /* Not possible... */
2493                 rprintf(FERROR, "argstr overflow in server_options().\n");
2494                 exit_cleanup(RERR_MALLOC);
2495         }
2496
2497         argstr[x] = '\0';
2498
2499         if (x > 1)
2500                 args[ac++] = argstr;
2501
2502 #ifdef ICONV_OPTION
2503         if (iconv_opt) {
2504                 char *set = strchr(iconv_opt, ',');
2505                 if (set)
2506                         set++;
2507                 else
2508                         set = iconv_opt;
2509                 if (asprintf(&arg, "--iconv=%s", set) < 0)
2510                         goto oom;
2511                 args[ac++] = arg;
2512         }
2513 #endif
2514
2515         if (protect_args && !local_server) /* unprotected args stop here */
2516                 args[ac++] = NULL;
2517
2518         if (list_only > 1)
2519                 args[ac++] = "--list-only";
2520
2521         /* This makes sure that the remote rsync can handle deleting with -d
2522          * sans -r because the --no-r option was added at the same time. */
2523         if (xfer_dirs && !recurse && delete_mode && am_sender)
2524                 args[ac++] = "--no-r";
2525
2526         if (do_compression && def_compress_level != Z_DEFAULT_COMPRESSION) {
2527                 if (asprintf(&arg, "--compress-level=%d", def_compress_level) < 0)
2528                         goto oom;
2529                 args[ac++] = arg;
2530         }
2531
2532         if (preserve_devices) {
2533                 /* Note: sending "--devices" would not be backward-compatible. */
2534                 if (!preserve_specials)
2535                         args[ac++] = "--no-specials"; /* -D is already set. */
2536         } else if (preserve_specials)
2537                 args[ac++] = "--specials";
2538
2539         /* The server side doesn't use our log-format, but in certain
2540          * circumstances they need to know a little about the option. */
2541         if (stdout_format && am_sender) {
2542                 /* Use --log-format, not --out-format, for compatibility. */
2543                 if (stdout_format_has_i > 1)
2544                         args[ac++] = "--log-format=%i%I";
2545                 else if (stdout_format_has_i)
2546                         args[ac++] = "--log-format=%i";
2547                 else if (stdout_format_has_o_or_i)
2548                         args[ac++] = "--log-format=%o";
2549                 else if (!verbose)
2550                         args[ac++] = "--log-format=X";
2551         }
2552
2553         if (block_size) {
2554                 if (asprintf(&arg, "-B%lu", block_size) < 0)
2555                         goto oom;
2556                 args[ac++] = arg;
2557         }
2558
2559         if (io_timeout) {
2560                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
2561                         goto oom;
2562                 args[ac++] = arg;
2563         }
2564
2565         if (bwlimit) {
2566                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
2567                         goto oom;
2568                 args[ac++] = arg;
2569         }
2570
2571         if (backup_dir) {
2572                 args[ac++] = "--backup-dir";
2573                 args[ac++] = backup_dir;
2574         }
2575
2576         /* Only send --suffix if it specifies a non-default value. */
2577         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
2578                 /* We use the following syntax to avoid weirdness with '~'. */
2579                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
2580                         goto oom;
2581                 args[ac++] = arg;
2582         }
2583
2584         if (am_sender) {
2585                 if (max_delete > 0) {
2586                         if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
2587                                 goto oom;
2588                         args[ac++] = arg;
2589                 } else if (max_delete == 0)
2590                         args[ac++] = "--max-delete=-1";
2591                 if (min_size >= 0) {
2592                         args[ac++] = "--min-size";
2593                         args[ac++] = min_size_arg;
2594                 }
2595                 if (max_size >= 0) {
2596                         args[ac++] = "--max-size";
2597                         args[ac++] = max_size_arg;
2598                 }
2599                 if (delete_before)
2600                         args[ac++] = "--delete-before";
2601                 else if (delete_during == 2)
2602                         args[ac++] = "--delete-delay";
2603                 else if (delete_during)
2604                         args[ac++] = "--delete-during";
2605                 else if (delete_after)
2606                         args[ac++] = "--delete-after";
2607                 else if (delete_mode && !delete_excluded)
2608                         args[ac++] = "--delete";
2609                 if (delete_excluded)
2610                         args[ac++] = "--delete-excluded";
2611                 if (force_delete)
2612                         args[ac++] = "--force";
2613                 if (write_batch < 0)
2614                         args[ac++] = "--only-write-batch=X";
2615                 if (am_root > 1)
2616                         args[ac++] = "--super";
2617                 if (size_only)
2618                         args[ac++] = "--size-only";
2619                 if (do_stats)
2620                         args[ac++] = "--stats";
2621         } else {
2622                 if (skip_compress) {
2623                         if (asprintf(&arg, "--skip-compress=%s", skip_compress) < 0)
2624                                 goto oom;
2625                         args[ac++] = arg;
2626                 }
2627         }
2628
2629         /* --delete-missing-args needs the cooperation of both sides, but
2630          * the sender can handle --ignore-missing-args by itself. */
2631         if (missing_args == 2)
2632                 args[ac++] = "--delete-missing-args";
2633         else if (missing_args == 1 && !am_sender)
2634                 args[ac++] = "--ignore-missing-args";
2635
2636         if (modify_window_set) {
2637                 if (asprintf(&arg, "--modify-window=%d", modify_window) < 0)
2638                         goto oom;
2639                 args[ac++] = arg;
2640         }
2641
2642         if (checksum_seed) {
2643                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
2644                         goto oom;
2645                 args[ac++] = arg;
2646         }
2647
2648         if (partial_dir && am_sender) {
2649                 if (partial_dir != tmp_partialdir) {
2650                         args[ac++] = "--partial-dir";
2651                         args[ac++] = partial_dir;
2652                 }
2653                 if (delay_updates)
2654                         args[ac++] = "--delay-updates";
2655         } else if (keep_partial && am_sender)
2656                 args[ac++] = "--partial";
2657
2658         if (ignore_errors)
2659                 args[ac++] = "--ignore-errors";
2660
2661         if (copy_unsafe_links)
2662                 args[ac++] = "--copy-unsafe-links";
2663
2664         if (safe_symlinks)
2665                 args[ac++] = "--safe-links";
2666
2667         if (numeric_ids)
2668                 args[ac++] = "--numeric-ids";
2669
2670         if (use_qsort)
2671                 args[ac++] = "--use-qsort";
2672
2673         if (am_sender) {
2674                 if (usermap) {
2675                         if (asprintf(&arg, "--usermap=%s", usermap) < 0)
2676                                 goto oom;
2677                         args[ac++] = arg;
2678                 }
2679
2680                 if (groupmap) {
2681                         if (asprintf(&arg, "--groupmap=%s", groupmap) < 0)
2682                                 goto oom;
2683                         args[ac++] = arg;
2684                 }
2685
2686                 if (ignore_existing)
2687                         args[ac++] = "--ignore-existing";
2688
2689                 /* Backward compatibility: send --existing, not --ignore-non-existing. */
2690                 if (ignore_non_existing)
2691                         args[ac++] = "--existing";
2692
2693                 if (tmpdir) {
2694                         args[ac++] = "--temp-dir";
2695                         args[ac++] = tmpdir;
2696                 }
2697
2698                 if (basis_dir[0]) {
2699                         /* the server only needs this option if it is not the sender,
2700                          *   and it may be an older version that doesn't know this
2701                          *   option, so don't send it if client is the sender.
2702                          */
2703                         for (i = 0; i < basis_dir_cnt; i++) {
2704                                 args[ac++] = dest_option;
2705                                 args[ac++] = basis_dir[i];
2706                         }
2707                 }
2708         }
2709
2710         /* What flags do we need to send to the other side? */
2711         where = (am_server ? W_CLI : W_SRV) | (am_sender ? W_REC : W_SND);
2712         arg = make_output_option(info_words, info_levels, where);
2713         if (arg)
2714                 args[ac++] = arg;
2715
2716         arg = make_output_option(debug_words, debug_levels, where);
2717         if (arg)
2718                 args[ac++] = arg;
2719
2720         if (append_mode) {
2721                 if (append_mode > 1)
2722                         args[ac++] = "--append";
2723                 args[ac++] = "--append";
2724         } else if (inplace)
2725                 args[ac++] = "--inplace";
2726
2727         if (files_from && (!am_sender || filesfrom_host)) {
2728                 if (filesfrom_host) {
2729                         args[ac++] = "--files-from";
2730                         args[ac++] = files_from;
2731                         if (eol_nulls)
2732                                 args[ac++] = "--from0";
2733                 } else {
2734                         args[ac++] = "--files-from=-";
2735                         args[ac++] = "--from0";
2736                 }
2737                 if (!relative_paths)
2738                         args[ac++] = "--no-relative";
2739         }
2740         /* It's OK that this checks the upper-bound of the protocol_version. */
2741         if (relative_paths && !implied_dirs && (!am_sender || protocol_version >= 30))
2742                 args[ac++] = "--no-implied-dirs";
2743
2744         if (remove_source_files == 1)
2745                 args[ac++] = "--remove-source-files";
2746         else if (remove_source_files)
2747                 args[ac++] = "--remove-sent-files";
2748
2749         if (preallocate_files && am_sender)
2750                 args[ac++] = "--preallocate";
2751
2752         if (ac > MAX_SERVER_ARGS) { /* Not possible... */
2753                 rprintf(FERROR, "argc overflow in server_options().\n");
2754                 exit_cleanup(RERR_MALLOC);
2755         }
2756
2757         if (remote_option_cnt) {
2758                 int j;
2759                 if (ac + remote_option_cnt > MAX_SERVER_ARGS) {
2760                         rprintf(FERROR, "too many remote options specified.\n");
2761                         exit_cleanup(RERR_SYNTAX);
2762                 }
2763                 for (j = 1; j <= remote_option_cnt; j++)
2764                         args[ac++] = (char*)remote_options[j];
2765         }
2766
2767         *argc_p = ac;
2768         return;
2769
2770     oom:
2771         out_of_memory("server_options");
2772 }
2773
2774 /* If str points to a valid hostspec, return allocated memory containing the
2775  * [USER@]HOST part of the string, and set the path_start_ptr to the part of
2776  * the string after the host part.  Otherwise, return NULL.  If port_ptr is
2777  * non-NULL, we must be parsing an rsync:// URL hostname, and we will set
2778  * *port_ptr if a port number is found.  Note that IPv6 IPs will have their
2779  * (required for parsing) [ and ] chars elided from the returned string. */
2780 static char *parse_hostspec(char *str, char **path_start_ptr, int *port_ptr)
2781 {
2782         char *s, *host_start = str;
2783         int hostlen = 0, userlen = 0;
2784         char *ret;
2785
2786         for (s = str; ; s++) {
2787                 if (!*s) {
2788                         /* It is only OK if we run out of string with rsync:// */
2789                         if (!port_ptr)
2790                                 return NULL;
2791                         if (!hostlen)
2792                                 hostlen = s - host_start;
2793                         break;
2794                 }
2795                 if (*s == ':' || *s == '/') {
2796                         if (!hostlen)
2797                                 hostlen = s - host_start;
2798                         if (*s++ == '/') {
2799                                 if (!port_ptr)
2800                                         return NULL;
2801                         } else if (port_ptr) {
2802                                 *port_ptr = atoi(s);
2803                                 while (isDigit(s)) s++;
2804                                 if (*s && *s++ != '/')
2805                                         return NULL;
2806                         }
2807                         break;
2808                 }
2809                 if (*s == '@') {
2810                         userlen = s - str + 1;
2811                         host_start = s + 1;
2812                 } else if (*s == '[') {
2813                         if (s != host_start++)
2814                                 return NULL;
2815                         while (*s && *s != ']' && *s != '/') s++; /*SHARED ITERATOR*/
2816                         hostlen = s - host_start;
2817                         if (*s != ']' || (s[1] && s[1] != '/' && s[1] != ':') || !hostlen)
2818                                 return NULL;
2819                 }
2820         }
2821
2822         *path_start_ptr = s;
2823         ret = new_array(char, userlen + hostlen + 1);
2824         if (userlen)
2825                 strlcpy(ret, str, userlen + 1);
2826         strlcpy(ret + userlen, host_start, hostlen + 1);
2827         return ret;
2828 }
2829
2830 /* Look for a HOST specfication of the form "HOST:PATH", "HOST::PATH", or
2831  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
2832  * memory with the HOST.  If a daemon-accessing spec was specified, the value
2833  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
2834  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
2835  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
2836  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
2837 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
2838 {
2839         char *path;
2840
2841         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
2842                 *host_ptr = parse_hostspec(s + strlen(URL_PREFIX), &path, port_ptr);
2843                 if (*host_ptr) {
2844                         if (!*port_ptr)
2845                                 *port_ptr = RSYNC_PORT;
2846                         return path;
2847                 }
2848         }
2849
2850         *host_ptr = parse_hostspec(s, &path, NULL);
2851         if (!*host_ptr)
2852                 return NULL;
2853
2854         if (*path == ':') {
2855                 if (port_ptr && !*port_ptr)
2856                         *port_ptr = RSYNC_PORT;
2857                 return path + 1;
2858         }
2859         if (port_ptr)
2860                 *port_ptr = 0;
2861
2862         return path;
2863 }