cc2c1ef9a82c5219b15e99140eecd78f29f81893
[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 *skip_compress = NULL;
127 item_list dparam_list = EMPTY_ITEM_LIST;
128
129 /** Network address family. **/
130 int default_af_hint
131 #ifdef INET6
132         = 0;            /* Any protocol */
133 #else
134         = AF_INET;      /* Must use IPv4 */
135 # ifdef AF_INET6
136 #  undef AF_INET6
137 # endif
138 # define AF_INET6 AF_INET /* make -6 option a no-op */
139 #endif
140
141 /** Do not go into the background when run as --daemon.  Good
142  * for debugging and required for running as a service on W32,
143  * or under Unix process-monitors. **/
144 int no_detach
145 #if defined _WIN32 || defined __WIN32__
146         = 1;
147 #else
148         = 0;
149 #endif
150
151 int write_batch = 0;
152 int read_batch = 0;
153 int backup_dir_len = 0;
154 int backup_suffix_len;
155 unsigned int backup_dir_remainder;
156
157 char *backup_suffix = NULL;
158 char *tmpdir = NULL;
159 char *partial_dir = NULL;
160 char *basis_dir[MAX_BASIS_DIRS+1];
161 char *config_file = NULL;
162 char *shell_cmd = NULL;
163 char *logfile_name = NULL;
164 char *logfile_format = NULL;
165 char *stdout_format = NULL;
166 char *password_file = NULL;
167 char *rsync_path = RSYNC_PATH;
168 char *backup_dir = NULL;
169 char backup_dir_buf[MAXPATHLEN];
170 char *sockopts = NULL;
171 char *usermap = NULL;
172 char *groupmap = NULL;
173 int rsync_port = 0;
174 int compare_dest = 0;
175 int copy_dest = 0;
176 int link_dest = 0;
177 int basis_dir_cnt = 0;
178 char *dest_option = NULL;
179
180 static int remote_option_alloc = 0;
181 int remote_option_cnt = 0;
182 const char **remote_options = NULL;
183
184 int quiet = 0;
185 int output_motd = 1;
186 int log_before_transfer = 0;
187 int stdout_format_has_i = 0;
188 int stdout_format_has_o_or_i = 0;
189 int logfile_format_has_i = 0;
190 int logfile_format_has_o_or_i = 0;
191 int always_checksum = 0;
192 int list_only = 0;
193
194 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
195 char *batch_name = NULL;
196
197 int need_unsorted_flist = 0;
198 #ifdef ICONV_OPTION
199 char *iconv_opt = ICONV_OPTION;
200 #endif
201
202 struct chmod_mode_struct *chmod_modes = NULL;
203
204 static const char *debug_verbosity[] = {
205         /*0*/ NULL,
206         /*1*/ NULL,
207         /*2*/ "BIND,CMD,CONNECT,DEL,DELTASUM,DUP,FILTER,FLIST,ICONV",
208         /*3*/ "ACL,BACKUP,CONNECT2,DELTASUM2,DEL2,EXIT,FILTER2,FLIST2,FUZZY,GENR,OWN,RECV,SEND,TIME",
209         /*4*/ "CMD2,DELTASUM3,DEL3,EXIT2,FLIST3,ICONV2,OWN2,PROTO,TIME2",
210         /*5*/ "CHDIR,DELTASUM4,FLIST4,FUZZY2,HASH,HLINK",
211 };
212
213 #define MAX_VERBOSITY ((int)(sizeof debug_verbosity / sizeof debug_verbosity[0]) - 1)
214
215 static const char *info_verbosity[1+MAX_VERBOSITY] = {
216         /*0*/ NULL,
217         /*1*/ "COPY,DEL,FLIST,MISC,NAME,STATS,SYMSAFE",
218         /*2*/ "BACKUP,MISC2,MOUNT,NAME2,REMOVE,SKIP",
219 };
220
221 #define MAX_OUT_LEVEL 4 /* The largest N allowed for any flagN word. */
222
223 short info_levels[COUNT_INFO], debug_levels[COUNT_DEBUG];
224
225 #define DEFAULT_PRIORITY 0      /* Default/implied/--verbose set values. */
226 #define HELP_PRIORITY 1         /* The help output uses this level. */
227 #define USER_PRIORITY 2         /* User-specified via --info or --debug */
228 #define LIMIT_PRIORITY 3        /* Overriding priority when limiting values. */
229
230 #define W_CLI (1<<0)    /* client side */
231 #define W_SRV (1<<1)    /* server side */
232 #define W_SND (1<<2)    /* sending side */
233 #define W_REC (1<<3)    /* receiving side */
234
235 struct output_struct {
236         char *name;     /* The name of the info/debug flag. */
237         char *help;     /* The description of the info/debug flag. */
238         uchar namelen;  /* The length of the name string. */
239         uchar flag;     /* The flag's value, for consistency check. */
240         uchar where;    /* Bits indicating where the flag is used. */
241         uchar priority; /* See *_PRIORITY defines. */
242 };
243
244 #define INFO_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, INFO_##flag, where, 0 }
245
246 static struct output_struct info_words[COUNT_INFO+1] = {
247         INFO_WORD(BACKUP, W_REC, "Mention files backed up"),
248         INFO_WORD(COPY, W_REC, "Mention files copied locally on the receiving side"),
249         INFO_WORD(DEL, W_REC, "Mention deletions on the receiving side"),
250         INFO_WORD(FLIST, W_CLI, "Mention file-list receiving/sending (levels 1-2)"),
251         INFO_WORD(MISC, W_SND|W_REC, "Mention miscellaneous information (levels 1-2)"),
252         INFO_WORD(MOUNT, W_SND|W_REC, "Mention mounts that were found or skipped"),
253         INFO_WORD(NAME, W_SND|W_REC, "Mention 1) updated file/dir names, 2) unchanged names"),
254         INFO_WORD(PROGRESS, W_CLI, "Mention 1) per-file progress or 2) total transfer progress"),
255         INFO_WORD(REMOVE, W_SND, "Mention files removed on the sending side"),
256         INFO_WORD(SKIP, W_REC, "Mention files that are skipped due to options used"),
257         INFO_WORD(STATS, W_CLI|W_SRV, "Mention statistics at end of run (levels 1-3)"),
258         INFO_WORD(SYMSAFE, W_SND|W_REC, "Mention symlinks that are unsafe"),
259         { NULL, "--info", 0, 0, 0, 0 }
260 };
261
262 #define DEBUG_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, DEBUG_##flag, where, 0 }
263
264 static struct output_struct debug_words[COUNT_DEBUG+1] = {
265         DEBUG_WORD(ACL, W_SND|W_REC, "Debug extra ACL info"),
266         DEBUG_WORD(BACKUP, W_REC, "Debug backup actions (levels 1-2)"),
267         DEBUG_WORD(BIND, W_CLI, "Debug socket bind actions"),
268         DEBUG_WORD(CHDIR, W_CLI|W_SRV, "Debug when the current directory changes"),
269         DEBUG_WORD(CONNECT, W_CLI, "Debug connection events (levels 1-2)"),
270         DEBUG_WORD(CMD, W_CLI, "Debug commands+options that are issued (levels 1-2)"),
271         DEBUG_WORD(DEL, W_REC, "Debug delete actions (levels 1-3)"),
272         DEBUG_WORD(DELTASUM, W_SND|W_REC, "Debug delta-transfer checksumming (levels 1-4)"),
273         DEBUG_WORD(DUP, W_REC, "Debug weeding of duplicate names"),
274         DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-3)"),
275         DEBUG_WORD(FILTER, W_SND|W_REC, "Debug filter actions (levels 1-2)"),
276         DEBUG_WORD(FLIST, W_SND|W_REC, "Debug file-list operations (levels 1-4)"),
277         DEBUG_WORD(FUZZY, W_REC, "Debug fuzzy scoring (levels 1-2)"),
278         DEBUG_WORD(GENR, W_REC, "Debug generator functions"),
279         DEBUG_WORD(HASH, W_SND|W_REC, "Debug hashtable code"),
280         DEBUG_WORD(HLINK, W_SND|W_REC, "Debug hard-link actions (levels 1-3)"),
281         DEBUG_WORD(ICONV, W_CLI|W_SRV, "Debug iconv character conversions (levels 1-2)"),
282         DEBUG_WORD(IO, W_CLI|W_SRV, "Debug I/O routines (levels 1-4)"),
283         DEBUG_WORD(OWN, W_REC, "Debug ownership changes in users & groups (levels 1-2)"),
284         DEBUG_WORD(PROTO, W_CLI|W_SRV, "Debug protocol information"),
285         DEBUG_WORD(RECV, W_REC, "Debug receiver functions"),
286         DEBUG_WORD(SEND, W_SND, "Debug sender functions"),
287         DEBUG_WORD(TIME, W_REC, "Debug setting of modified times (levels 1-2)"),
288         { NULL, "--debug", 0, 0, 0, 0 }
289 };
290
291 static int verbose = 0;
292 static int do_stats = 0;
293 static int do_progress = 0;
294 static int daemon_opt;   /* sets am_daemon after option error-reporting */
295 static int omit_dir_times = 0;
296 static int omit_link_times = 0;
297 static int F_option_cnt = 0;
298 static int modify_window_set;
299 static int itemize_changes = 0;
300 static int refused_delete, refused_archive_part, refused_compress;
301 static int refused_partial, refused_progress, refused_delete_before;
302 static int refused_delete_during;
303 static int refused_inplace, refused_no_iconv;
304 static BOOL usermap_via_chown, groupmap_via_chown;
305 #ifdef HAVE_SETVBUF
306 static char *outbuf_mode;
307 #endif
308 static char *bwlimit_arg, *max_size_arg, *min_size_arg;
309 static char tmp_partialdir[] = ".~tmp~";
310
311 /** Local address to bind.  As a character string because it's
312  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
313  * address, or a hostname. **/
314 char *bind_address;
315
316 static void output_item_help(struct output_struct *words);
317
318 /* This constructs a string that represents all the options set for either
319  * the --info or --debug setting, skipping any implied options (by -v, etc.).
320  * This is used both when conveying the user's options to the server, and
321  * when the help output wants to tell the user what options are implied. */
322 static char *make_output_option(struct output_struct *words, short *levels, uchar where)
323 {
324         char *str = words == info_words ? "--info=" : "--debug=";
325         int j, counts[MAX_OUT_LEVEL+1], pos, skipped = 0, len = 0, max = 0, lev = 0;
326         int word_count = words == info_words ? COUNT_INFO : COUNT_DEBUG;
327         char *buf;
328
329         memset(counts, 0, sizeof counts);
330
331         for (j = 0; words[j].name; j++) {
332                 if (words[j].flag != j) {
333                         rprintf(FERROR, "rsync: internal error on %s%s: %d != %d\n",
334                                 words == info_words ? "INFO_" : "DEBUG_",
335                                 words[j].name, words[j].flag, j);
336                         exit_cleanup(RERR_UNSUPPORTED);
337                 }
338                 if (!(words[j].where & where))
339                         continue;
340                 if (words[j].priority == DEFAULT_PRIORITY) {
341                         /* Implied items don't need to be mentioned. */
342                         skipped++;
343                         continue;
344                 }
345                 len += len ? 1 : strlen(str);
346                 len += strlen(words[j].name);
347                 len += levels[j] == 1 ? 0 : 1;
348
349                 if (words[j].priority == HELP_PRIORITY)
350                         continue; /* no abbreviating for help */
351
352                 assert(levels[j] <= MAX_OUT_LEVEL);
353                 if (++counts[levels[j]] > max) {
354                         /* Determine which level has the most items. */
355                         lev = levels[j];
356                         max = counts[lev];
357                 }
358         }
359
360         /* Sanity check the COUNT_* define against the length of the table. */
361         if (j != word_count) {
362                 rprintf(FERROR, "rsync: internal error: %s is wrong! (%d != %d)\n",
363                         words == info_words ? "COUNT_INFO" : "COUNT_DEBUG",
364                         j, word_count);
365                 exit_cleanup(RERR_UNSUPPORTED);
366         }
367
368         if (!len)
369                 return NULL;
370
371         len++;
372         if (!(buf = new_array(char, len)))
373                 out_of_memory("make_output_option");
374         pos = 0;
375
376         if (skipped || max < 5)
377                 lev = -1;
378         else {
379                 if (lev == 0)
380                         pos += snprintf(buf, len, "%sNONE", str);
381                 else if (lev == 1)
382                         pos += snprintf(buf, len, "%sALL", str);
383                 else
384                         pos += snprintf(buf, len, "%sALL%d", str, lev);
385         }
386
387         for (j = 0; words[j].name && pos < len; j++) {
388                 if (words[j].priority == DEFAULT_PRIORITY || levels[j] == lev || !(words[j].where & where))
389                         continue;
390                 if (pos)
391                         buf[pos++] = ',';
392                 else
393                         pos += strlcpy(buf+pos, str, len-pos);
394                 if (pos < len)
395                         pos += strlcpy(buf+pos, words[j].name, len-pos);
396                 /* Level 1 is implied by the name alone. */
397                 if (levels[j] != 1 && pos < len)
398                         buf[pos++] = '0' + levels[j];
399         }
400
401         buf[pos] = '\0';
402
403         return buf;
404 }
405
406 static void parse_output_words(struct output_struct *words, short *levels,
407                                const char *str, uchar priority)
408 {
409         const char *s;
410         int j, len, lev;
411
412         if (!str)
413                 return;
414
415         while (*str) {
416                 if ((s = strchr(str, ',')) != NULL)
417                         len = s++ - str;
418                 else
419                         len = strlen(str);
420                 while (len && isDigit(str+len-1))
421                         len--;
422                 lev = isDigit(str+len) ? atoi(str+len) : 1;
423                 if (lev > MAX_OUT_LEVEL)
424                         lev = MAX_OUT_LEVEL;
425                 if (len == 4 && strncasecmp(str, "help", 4) == 0) {
426                         output_item_help(words);
427                         exit_cleanup(0);
428                 }
429                 if (len == 4 && strncasecmp(str, "none", 4) == 0)
430                         len = lev = 0;
431                 else if (len == 3 && strncasecmp(str, "all", 3) == 0)
432                         len = 0;
433                 for (j = 0; words[j].name; j++) {
434                         if (!len
435                          || (len == words[j].namelen && strncasecmp(str, words[j].name, len) == 0)) {
436                                 if (priority >= words[j].priority) {
437                                         words[j].priority = priority;
438                                         levels[j] = lev;
439                                 }
440                                 if (len)
441                                         break;
442                         }
443                 }
444                 if (len && !words[j].name) {
445                         rprintf(FERROR, "Unknown %s item: \"%.*s\"\n",
446                                 words[j].help, len, str);
447                         exit_cleanup(RERR_SYNTAX);
448                 }
449                 if (!s)
450                         break;
451                 str = s;
452         }
453 }
454
455 /* Tell the user what all the info or debug flags mean. */
456 static void output_item_help(struct output_struct *words)
457 {
458         short *levels = words == info_words ? info_levels : debug_levels;
459         const char **verbosity = words == info_words ? info_verbosity : debug_verbosity;
460         char buf[128], *opt, *fmt = "%-10s %s\n";
461         int j;
462
463         reset_output_levels();
464
465         rprintf(FINFO, "Use OPT or OPT1 for level 1 output, OPT2 for level 2, etc.; OPT0 silences.\n");
466         rprintf(FINFO, "\n");
467         for (j = 0; words[j].name; j++)
468                 rprintf(FINFO, fmt, words[j].name, words[j].help);
469         rprintf(FINFO, "\n");
470
471         snprintf(buf, sizeof buf, "Set all %s options (e.g. all%d)",
472                  words[j].help, MAX_OUT_LEVEL);
473         rprintf(FINFO, fmt, "ALL", buf);
474
475         snprintf(buf, sizeof buf, "Silence all %s options (same as all0)",
476                  words[j].help);
477         rprintf(FINFO, fmt, "NONE", buf);
478
479         rprintf(FINFO, fmt, "HELP", "Output this help message");
480         rprintf(FINFO, "\n");
481         rprintf(FINFO, "Options added for each increase in verbose level:\n");
482
483         for (j = 1; j <= MAX_VERBOSITY; j++) {
484                 parse_output_words(words, levels, verbosity[j], HELP_PRIORITY);
485                 opt = make_output_option(words, levels, W_CLI|W_SRV|W_SND|W_REC);
486                 if (opt) {
487                         rprintf(FINFO, "%d) %s\n", j, strchr(opt, '=')+1);
488                         free(opt);
489                 }
490                 reset_output_levels();
491         }
492 }
493
494 /* The --verbose option now sets info+debug flags. */
495 static void set_output_verbosity(int level, uchar priority)
496 {
497         int j;
498
499         if (level > MAX_VERBOSITY)
500                 level = MAX_VERBOSITY;
501
502         for (j = 1; j <= level; j++) {
503                 parse_output_words(info_words, info_levels, info_verbosity[j], priority);
504                 parse_output_words(debug_words, debug_levels, debug_verbosity[j], priority);
505         }
506 }
507
508 /* Limit the info+debug flag levels given a verbose-option level limit. */
509 void limit_output_verbosity(int level)
510 {
511         short info_limits[COUNT_INFO], debug_limits[COUNT_DEBUG];
512         int j;
513
514         if (level > MAX_VERBOSITY)
515                 return;
516
517         memset(info_limits, 0, sizeof info_limits);
518         memset(debug_limits, 0, sizeof debug_limits);
519
520         /* Compute the level limits in the above arrays. */
521         for (j = 1; j <= level; j++) {
522                 parse_output_words(info_words, info_limits, info_verbosity[j], LIMIT_PRIORITY);
523                 parse_output_words(debug_words, debug_limits, debug_verbosity[j], LIMIT_PRIORITY);
524         }
525
526         for (j = 0; j < COUNT_INFO; j++) {
527                 if (info_levels[j] > info_limits[j])
528                         info_levels[j] = info_limits[j];
529         }
530
531         for (j = 0; j < COUNT_DEBUG; j++) {
532                 if (debug_levels[j] > debug_limits[j])
533                         debug_levels[j] = debug_limits[j];
534         }
535 }
536
537 void reset_output_levels(void)
538 {
539         int j;
540
541         memset(info_levels, 0, sizeof info_levels);
542         memset(debug_levels, 0, sizeof debug_levels);
543
544         for (j = 0; j < COUNT_INFO; j++)
545                 info_words[j].priority = DEFAULT_PRIORITY;
546
547         for (j = 0; j < COUNT_DEBUG; j++)
548                 debug_words[j].priority = DEFAULT_PRIORITY;
549 }
550
551 void negate_output_levels(void)
552 {
553         int j;
554
555         for (j = 0; j < COUNT_INFO; j++)
556                 info_levels[j] *= -1;
557
558         for (j = 0; j < COUNT_DEBUG; j++)
559                 debug_levels[j] *= -1;
560 }
561
562 static void print_rsync_version(enum logcode f)
563 {
564         char *subprotocol = "";
565         char const *got_socketpair = "no ";
566         char const *have_inplace = "no ";
567         char const *hardlinks = "no ";
568         char const *prealloc = "no ";
569         char const *symtimes = "no ";
570         char const *acls = "no ";
571         char const *xattrs = "no ";
572         char const *links = "no ";
573         char const *iconv = "no ";
574         char const *ipv6 = "no ";
575         STRUCT_STAT *dumstat;
576
577 #if SUBPROTOCOL_VERSION != 0
578         if (asprintf(&subprotocol, ".PR%d", SUBPROTOCOL_VERSION) < 0)
579                 out_of_memory("print_rsync_version");
580 #endif
581 #ifdef HAVE_SOCKETPAIR
582         got_socketpair = "";
583 #endif
584 #ifdef HAVE_FTRUNCATE
585         have_inplace = "";
586 #endif
587 #ifdef SUPPORT_HARD_LINKS
588         hardlinks = "";
589 #endif
590 #ifdef SUPPORT_PREALLOCATION
591         prealloc = "";
592 #endif
593 #ifdef SUPPORT_ACLS
594         acls = "";
595 #endif
596 #ifdef SUPPORT_XATTRS
597         xattrs = "";
598 #endif
599 #ifdef SUPPORT_LINKS
600         links = "";
601 #endif
602 #ifdef INET6
603         ipv6 = "";
604 #endif
605 #ifdef ICONV_OPTION
606         iconv = "";
607 #endif
608 #ifdef CAN_SET_SYMLINK_TIMES
609         symtimes = "";
610 #endif
611
612         rprintf(f, "%s  version %s  protocol version %d%s\n",
613                 RSYNC_NAME, RSYNC_VERSION, PROTOCOL_VERSION, subprotocol);
614         rprintf(f, "Copyright (C) 1996-2013 by Andrew Tridgell, Wayne Davison, and others.\n");
615         rprintf(f, "Web site: http://rsync.samba.org/\n");
616         rprintf(f, "Capabilities:\n");
617         rprintf(f, "    %d-bit files, %d-bit inums, %d-bit timestamps, %d-bit long ints,\n",
618                 (int)(sizeof (OFF_T) * 8),
619                 (int)(sizeof dumstat->st_ino * 8), /* Don't check ino_t! */
620                 (int)(sizeof (time_t) * 8),
621                 (int)(sizeof (int64) * 8));
622         rprintf(f, "    %ssocketpairs, %shardlinks, %ssymlinks, %sIPv6, batchfiles, %sinplace,\n",
623                 got_socketpair, hardlinks, links, ipv6, have_inplace);
624         rprintf(f, "    %sappend, %sACLs, %sxattrs, %siconv, %ssymtimes, %sprealloc\n",
625                 have_inplace, acls, xattrs, iconv, symtimes, prealloc);
626
627 #ifdef MAINTAINER_MODE
628         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
629 #endif
630
631 #if SIZEOF_INT64 < 8
632         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
633 #endif
634         if (sizeof (int64) != SIZEOF_INT64) {
635                 rprintf(f,
636                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
637                         (int) SIZEOF_INT64, (int) sizeof (int64));
638         }
639
640         rprintf(f,"\n");
641         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
642         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
643         rprintf(f,"General Public Licence for details.\n");
644 }
645
646
647 void usage(enum logcode F)
648 {
649   print_rsync_version(F);
650
651   rprintf(F,"\n");
652   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
653   rprintf(F,"via a fast differencing algorithm.\n");
654
655   rprintf(F,"\n");
656   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
657   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
658   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
659   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
660   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
661   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
662   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
663   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
664   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
665   rprintf(F,"\n");
666   rprintf(F,"Options\n");
667   rprintf(F," -v, --verbose               increase verbosity\n");
668   rprintf(F,"     --info=FLAGS            fine-grained informational verbosity\n");
669   rprintf(F,"     --debug=FLAGS           fine-grained debug verbosity\n");
670   rprintf(F,"     --msgs2stderr           special output handling for debugging\n");
671   rprintf(F," -q, --quiet                 suppress non-error messages\n");
672   rprintf(F,"     --no-motd               suppress daemon-mode MOTD (see manpage caveat)\n");
673   rprintf(F," -c, --checksum              skip based on checksum, not mod-time & size\n");
674   rprintf(F," -a, --archive               archive mode; equals -rlptgoD (no -H,-A,-X)\n");
675   rprintf(F,"     --no-OPTION             turn off an implied OPTION (e.g. --no-D)\n");
676   rprintf(F," -r, --recursive             recurse into directories\n");
677   rprintf(F," -R, --relative              use relative path names\n");
678   rprintf(F,"     --no-implied-dirs       don't send implied dirs with --relative\n");
679   rprintf(F," -b, --backup                make backups (see --suffix & --backup-dir)\n");
680   rprintf(F,"     --backup-dir=DIR        make backups into hierarchy based in DIR\n");
681   rprintf(F,"     --suffix=SUFFIX         set backup suffix (default %s w/o --backup-dir)\n",BACKUP_SUFFIX);
682   rprintf(F," -u, --update                skip files that are newer on the receiver\n");
683   rprintf(F,"     --inplace               update destination files in-place (SEE MAN PAGE)\n");
684   rprintf(F,"     --append                append data onto shorter files\n");
685   rprintf(F,"     --append-verify         like --append, but with old data in file checksum\n");
686   rprintf(F," -d, --dirs                  transfer directories without recursing\n");
687   rprintf(F," -l, --links                 copy symlinks as symlinks\n");
688   rprintf(F," -L, --copy-links            transform symlink into referent file/dir\n");
689   rprintf(F,"     --copy-unsafe-links     only \"unsafe\" symlinks are transformed\n");
690   rprintf(F,"     --safe-links            ignore symlinks that point outside the source tree\n");
691   rprintf(F,"     --munge-links           munge symlinks to make them safer (but unusable)\n");
692   rprintf(F," -k, --copy-dirlinks         transform symlink to a dir into referent dir\n");
693   rprintf(F," -K, --keep-dirlinks         treat symlinked dir on receiver as dir\n");
694   rprintf(F," -H, --hard-links            preserve hard links\n");
695   rprintf(F," -p, --perms                 preserve permissions\n");
696   rprintf(F," -E, --executability         preserve the file's executability\n");
697   rprintf(F,"     --chmod=CHMOD           affect file and/or directory permissions\n");
698 #ifdef SUPPORT_ACLS
699   rprintf(F," -A, --acls                  preserve ACLs (implies --perms)\n");
700 #endif
701 #ifdef SUPPORT_XATTRS
702   rprintf(F," -X, --xattrs                preserve extended attributes\n");
703 #endif
704   rprintf(F," -o, --owner                 preserve owner (super-user only)\n");
705   rprintf(F," -g, --group                 preserve group\n");
706   rprintf(F,"     --devices               preserve device files (super-user only)\n");
707   rprintf(F,"     --specials              preserve special files\n");
708   rprintf(F," -D                          same as --devices --specials\n");
709   rprintf(F," -t, --times                 preserve modification times\n");
710   rprintf(F," -O, --omit-dir-times        omit directories from --times\n");
711   rprintf(F," -J, --omit-link-times       omit symlinks from --times\n");
712   rprintf(F,"     --super                 receiver attempts super-user activities\n");
713 #ifdef SUPPORT_XATTRS
714   rprintf(F,"     --fake-super            store/recover privileged attrs using xattrs\n");
715 #endif
716   rprintf(F," -S, --sparse                handle sparse files efficiently\n");
717 #ifdef SUPPORT_PREALLOCATION
718   rprintf(F,"     --preallocate           allocate dest files before writing them\n");
719 #else
720   rprintf(F,"     --preallocate           pre-allocate dest files on remote receiver\n");
721 #endif
722   rprintf(F," -n, --dry-run               perform a trial run with no changes made\n");
723   rprintf(F," -W, --whole-file            copy files whole (without delta-xfer algorithm)\n");
724   rprintf(F," -x, --one-file-system       don't cross filesystem boundaries\n");
725   rprintf(F," -B, --block-size=SIZE       force a fixed checksum block-size\n");
726   rprintf(F," -e, --rsh=COMMAND           specify the remote shell to use\n");
727   rprintf(F,"     --rsync-path=PROGRAM    specify the rsync to run on the remote machine\n");
728   rprintf(F,"     --existing              skip creating new files on receiver\n");
729   rprintf(F,"     --ignore-existing       skip updating files that already exist on receiver\n");
730   rprintf(F,"     --remove-source-files   sender removes synchronized files (non-dirs)\n");
731   rprintf(F,"     --del                   an alias for --delete-during\n");
732   rprintf(F,"     --delete                delete extraneous files from destination dirs\n");
733   rprintf(F,"     --delete-before         receiver deletes before transfer, not during\n");
734   rprintf(F,"     --delete-during         receiver deletes during the transfer\n");
735   rprintf(F,"     --delete-delay          find deletions during, delete after\n");
736   rprintf(F,"     --delete-after          receiver deletes after transfer, not during\n");
737   rprintf(F,"     --delete-excluded       also delete excluded files from destination dirs\n");
738   rprintf(F,"     --ignore-missing-args   ignore missing source args without error\n");
739   rprintf(F,"     --delete-missing-args   delete missing source args from destination\n");
740   rprintf(F,"     --ignore-errors         delete even if there are I/O errors\n");
741   rprintf(F,"     --force                 force deletion of directories even if not empty\n");
742   rprintf(F,"     --max-delete=NUM        don't delete more than NUM files\n");
743   rprintf(F,"     --max-size=SIZE         don't transfer any file larger than SIZE\n");
744   rprintf(F,"     --min-size=SIZE         don't transfer any file smaller than SIZE\n");
745   rprintf(F,"     --partial               keep partially transferred files\n");
746   rprintf(F,"     --partial-dir=DIR       put a partially transferred file into DIR\n");
747   rprintf(F,"     --delay-updates         put all updated files into place at transfer's end\n");
748   rprintf(F," -m, --prune-empty-dirs      prune empty directory chains from the file-list\n");
749   rprintf(F,"     --numeric-ids           don't map uid/gid values by user/group name\n");
750   rprintf(F,"     --usermap=STRING        custom username mapping\n");
751   rprintf(F,"     --groupmap=STRING       custom groupname mapping\n");
752   rprintf(F,"     --chown=USER:GROUP      simple username/groupname mapping\n");
753   rprintf(F,"     --timeout=SECONDS       set I/O timeout in seconds\n");
754   rprintf(F,"     --contimeout=SECONDS    set daemon connection timeout in seconds\n");
755   rprintf(F," -I, --ignore-times          don't skip files that match in size and mod-time\n");
756   rprintf(F," -M, --remote-option=OPTION  send OPTION to the remote side only\n");
757   rprintf(F,"     --size-only             skip files that match in size\n");
758   rprintf(F,"     --modify-window=NUM     compare mod-times with reduced accuracy\n");
759   rprintf(F," -T, --temp-dir=DIR          create temporary files in directory DIR\n");
760   rprintf(F," -y, --fuzzy                 find similar file for basis if no dest file\n");
761   rprintf(F,"     --compare-dest=DIR      also compare destination files relative to DIR\n");
762   rprintf(F,"     --copy-dest=DIR         ... and include copies of unchanged files\n");
763   rprintf(F,"     --link-dest=DIR         hardlink to files in DIR when unchanged\n");
764   rprintf(F," -z, --compress              compress file data during the transfer\n");
765   rprintf(F,"     --compress-level=NUM    explicitly set compression level\n");
766   rprintf(F,"     --skip-compress=LIST    skip compressing files with a suffix in LIST\n");
767   rprintf(F," -C, --cvs-exclude           auto-ignore files the same way CVS does\n");
768   rprintf(F," -f, --filter=RULE           add a file-filtering RULE\n");
769   rprintf(F," -F                          same as --filter='dir-merge /.rsync-filter'\n");
770   rprintf(F,"                             repeated: --filter='- .rsync-filter'\n");
771   rprintf(F,"     --exclude=PATTERN       exclude files matching PATTERN\n");
772   rprintf(F,"     --exclude-from=FILE     read exclude patterns from FILE\n");
773   rprintf(F,"     --include=PATTERN       don't exclude files matching PATTERN\n");
774   rprintf(F,"     --include-from=FILE     read include patterns from FILE\n");
775   rprintf(F,"     --files-from=FILE       read list of source-file names from FILE\n");
776   rprintf(F," -0, --from0                 all *-from/filter files are delimited by 0s\n");
777   rprintf(F," -s, --protect-args          no space-splitting; only wildcard special-chars\n");
778   rprintf(F,"     --address=ADDRESS       bind address for outgoing socket to daemon\n");
779   rprintf(F,"     --port=PORT             specify double-colon alternate port number\n");
780   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
781   rprintf(F,"     --blocking-io           use blocking I/O for the remote shell\n");
782   rprintf(F,"     --stats                 give some file-transfer stats\n");
783   rprintf(F," -8, --8-bit-output          leave high-bit chars unescaped in output\n");
784   rprintf(F," -h, --human-readable        output numbers in a human-readable format\n");
785   rprintf(F,"     --progress              show progress during transfer\n");
786   rprintf(F," -P                          same as --partial --progress\n");
787   rprintf(F," -i, --itemize-changes       output a change-summary for all updates\n");
788   rprintf(F,"     --out-format=FORMAT     output updates using the specified FORMAT\n");
789   rprintf(F,"     --log-file=FILE         log what we're doing to the specified FILE\n");
790   rprintf(F,"     --log-file-format=FMT   log updates using the specified FMT\n");
791   rprintf(F,"     --password-file=FILE    read daemon-access password from FILE\n");
792   rprintf(F,"     --list-only             list the files instead of copying them\n");
793   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
794 #ifdef HAVE_SETVBUF
795   rprintf(F,"     --outbuf=N|L|B          set output buffering to None, Line, or Block\n");
796 #endif
797   rprintf(F,"     --write-batch=FILE      write a batched update to FILE\n");
798   rprintf(F,"     --only-write-batch=FILE like --write-batch but w/o updating destination\n");
799   rprintf(F,"     --read-batch=FILE       read a batched update from FILE\n");
800   rprintf(F,"     --protocol=NUM          force an older protocol version to be used\n");
801 #ifdef ICONV_OPTION
802   rprintf(F,"     --iconv=CONVERT_SPEC    request charset conversion of filenames\n");
803 #endif
804   rprintf(F,"     --checksum-seed=NUM     set block/file checksum seed (advanced)\n");
805   rprintf(F," -4, --ipv4                  prefer IPv4\n");
806   rprintf(F," -6, --ipv6                  prefer IPv6\n");
807   rprintf(F,"     --version               print version number\n");
808   rprintf(F,"(-h) --help                  show this help (-h is --help only if used alone)\n");
809
810   rprintf(F,"\n");
811   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
812   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
813   rprintf(F,"See http://rsync.samba.org/ for updates, bug reports, and answers\n");
814 }
815
816 enum {OPT_VERSION = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
817       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
818       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
819       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
820       OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, OPT_INFO, OPT_DEBUG,
821       OPT_USERMAP, OPT_GROUPMAP, OPT_CHOWN, OPT_BWLIMIT,
822       OPT_SERVER, OPT_REFUSED_BASE = 9000};
823
824 static struct poptOption long_options[] = {
825   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
826   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
827   {"version",          0,  POPT_ARG_NONE,   0, OPT_VERSION, 0, 0},
828   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
829   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
830   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
831   {"info",             0,  POPT_ARG_STRING, 0, OPT_INFO, 0, 0 },
832   {"debug",            0,  POPT_ARG_STRING, 0, OPT_DEBUG, 0, 0 },
833   {"msgs2stderr",      0,  POPT_ARG_NONE,   &msgs2stderr, 0, 0, 0 },
834   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
835   {"motd",             0,  POPT_ARG_VAL,    &output_motd, 1, 0, 0 },
836   {"no-motd",          0,  POPT_ARG_VAL,    &output_motd, 0, 0, 0 },
837   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
838   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
839   {"no-human-readable",0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
840   {"no-h",             0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
841   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
842   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
843   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
844   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
845   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
846   {"inc-recursive",    0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
847   {"no-inc-recursive", 0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
848   {"i-r",              0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
849   {"no-i-r",           0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
850   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
851   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
852   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
853   {"old-dirs",         0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
854   {"old-d",            0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
855   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
856   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
857   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
858   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
859   {"acls",            'A', POPT_ARG_NONE,   0, 'A', 0, 0 },
860   {"no-acls",          0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
861   {"no-A",             0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
862   {"xattrs",          'X', POPT_ARG_NONE,   0, 'X', 0, 0 },
863   {"no-xattrs",        0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
864   {"no-X",             0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
865   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
866   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
867   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
868   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 1, 0, 0 },
869   {"no-omit-dir-times",0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
870   {"no-O",             0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
871   {"omit-link-times", 'J', POPT_ARG_VAL,    &omit_link_times, 1, 0, 0 },
872   {"no-omit-link-times",0, POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
873   {"no-J",             0,  POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
874   {"modify-window",    0,  POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
875   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
876   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
877   {"fake-super",       0,  POPT_ARG_VAL,    &am_root, -1, 0, 0 },
878   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
879   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
880   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
881   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
882   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
883   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
884   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
885   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
886   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
887   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
888   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
889   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
890   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
891   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
892   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
893   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
894   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
895   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
896   {"munge-links",      0,  POPT_ARG_VAL,    &munge_symlinks, 1, 0, 0 },
897   {"no-munge-links",   0,  POPT_ARG_VAL,    &munge_symlinks, 0, 0, 0 },
898   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
899   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
900   {"hard-links",      'H', POPT_ARG_NONE,   0, 'H', 0, 0 },
901   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
902   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
903   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
904   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
905   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
906   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
907   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
908   {"i-d",              0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
909   {"no-i-d",           0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
910   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
911   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
912   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
913   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
914   {"no-one-file-system",0, POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
915   {"no-x",             0,  POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
916   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
917   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
918   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
919   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
920   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
921   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
922   {"sparse",          'S', POPT_ARG_VAL,    &sparse_files, 1, 0, 0 },
923   {"no-sparse",        0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
924   {"no-S",             0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
925   {"preallocate",      0,  POPT_ARG_NONE,   &preallocate_files, 0, 0, 0},
926   {"inplace",          0,  POPT_ARG_VAL,    &inplace, 1, 0, 0 },
927   {"no-inplace",       0,  POPT_ARG_VAL,    &inplace, 0, 0, 0 },
928   {"append",           0,  POPT_ARG_NONE,   0, OPT_APPEND, 0, 0 },
929   {"append-verify",    0,  POPT_ARG_VAL,    &append_mode, 2, 0, 0 },
930   {"no-append",        0,  POPT_ARG_VAL,    &append_mode, 0, 0, 0 },
931   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
932   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
933   {"delete-before",    0,  POPT_ARG_NONE,   &delete_before, 0, 0, 0 },
934   {"delete-during",    0,  POPT_ARG_VAL,    &delete_during, 1, 0, 0 },
935   {"delete-delay",     0,  POPT_ARG_VAL,    &delete_during, 2, 0, 0 },
936   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
937   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
938   {"delete-missing-args",0,POPT_BIT_SET,    &missing_args, 2, 0, 0 },
939   {"ignore-missing-args",0,POPT_BIT_SET,    &missing_args, 1, 0, 0 },
940   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_source_files, 2, 0, 0 }, /* deprecated */
941   {"remove-source-files",0,POPT_ARG_VAL,    &remove_source_files, 1, 0, 0 },
942   {"force",            0,  POPT_ARG_VAL,    &force_delete, 1, 0, 0 },
943   {"no-force",         0,  POPT_ARG_VAL,    &force_delete, 0, 0, 0 },
944   {"ignore-errors",    0,  POPT_ARG_VAL,    &ignore_errors, 1, 0, 0 },
945   {"no-ignore-errors", 0,  POPT_ARG_VAL,    &ignore_errors, 0, 0, 0 },
946   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
947   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
948   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
949   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
950   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
951   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
952   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
953   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
954   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
955   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
956   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
957   {"checksum",        'c', POPT_ARG_VAL,    &always_checksum, 1, 0, 0 },
958   {"no-checksum",      0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
959   {"no-c",             0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
960   {"block-size",      'B', POPT_ARG_LONG,   &block_size, 0, 0, 0 },
961   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
962   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
963   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
964   {"fuzzy",           'y', POPT_ARG_NONE,   0, 'y', 0, 0 },
965   {"no-fuzzy",         0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
966   {"no-y",             0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
967   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
968   {"no-compress",      0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
969   {"no-z",             0,  POPT_ARG_VAL,    &do_compression, 0, 0, 0 },
970   {"skip-compress",    0,  POPT_ARG_STRING, &skip_compress, 0, 0, 0 },
971   {"compress-level",   0,  POPT_ARG_INT,    &def_compress_level, 'z', 0, 0 },
972   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
973   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
974   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
975   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
976   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
977   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
978   {"delay-updates",    0,  POPT_ARG_VAL,    &delay_updates, 1, 0, 0 },
979   {"no-delay-updates", 0,  POPT_ARG_VAL,    &delay_updates, 0, 0, 0 },
980   {"prune-empty-dirs",'m', POPT_ARG_VAL,    &prune_empty_dirs, 1, 0, 0 },
981   {"no-prune-empty-dirs",0,POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
982   {"no-m",             0,  POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
983   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
984   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
985   {"out-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 },
986   {"log-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 }, /* DEPRECATED */
987   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
988   {"no-itemize-changes",0, POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
989   {"no-i",             0,  POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
990   {"bwlimit",          0,  POPT_ARG_STRING, &bwlimit_arg, OPT_BWLIMIT, 0, 0 },
991   {"no-bwlimit",       0,  POPT_ARG_VAL,    &bwlimit, 0, 0, 0 },
992   {"backup",          'b', POPT_ARG_VAL,    &make_backups, 1, 0, 0 },
993   {"no-backup",        0,  POPT_ARG_VAL,    &make_backups, 0, 0, 0 },
994   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
995   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
996   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
997   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
998   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
999   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
1000   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
1001   {"from0",           '0', POPT_ARG_VAL,    &eol_nulls, 1, 0, 0},
1002   {"no-from0",         0,  POPT_ARG_VAL,    &eol_nulls, 0, 0, 0},
1003   {"protect-args",    's', POPT_ARG_VAL,    &protect_args, 1, 0, 0},
1004   {"no-protect-args",  0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1005   {"no-s",             0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1006   {"numeric-ids",      0,  POPT_ARG_VAL,    &numeric_ids, 1, 0, 0 },
1007   {"no-numeric-ids",   0,  POPT_ARG_VAL,    &numeric_ids, 0, 0, 0 },
1008   {"usermap",          0,  POPT_ARG_STRING, 0, OPT_USERMAP, 0, 0 },
1009   {"groupmap",         0,  POPT_ARG_STRING, 0, OPT_GROUPMAP, 0, 0 },
1010   {"chown",            0,  POPT_ARG_STRING, 0, OPT_CHOWN, 0, 0 },
1011   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
1012   {"no-timeout",       0,  POPT_ARG_VAL,    &io_timeout, 0, 0, 0 },
1013   {"contimeout",       0,  POPT_ARG_INT,    &connect_timeout, 0, 0, 0 },
1014   {"no-contimeout",    0,  POPT_ARG_VAL,    &connect_timeout, 0, 0, 0 },
1015   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
1016   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
1017   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1018 #ifdef ICONV_OPTION
1019   {"iconv",            0,  POPT_ARG_STRING, &iconv_opt, 0, 0, 0 },
1020   {"no-iconv",         0,  POPT_ARG_NONE,   0, OPT_NO_ICONV, 0, 0 },
1021 #endif
1022   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1023   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1024   {"8-bit-output",    '8', POPT_ARG_VAL,    &allow_8bit_chars, 1, 0, 0 },
1025   {"no-8-bit-output",  0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1026   {"no-8",             0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1027   {"qsort",            0,  POPT_ARG_NONE,   &use_qsort, 0, 0, 0 },
1028   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1029   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1030   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1031   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
1032   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
1033   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
1034 #ifdef HAVE_SETVBUF
1035   {"outbuf",           0,  POPT_ARG_STRING, &outbuf_mode, 0, 0, 0 },
1036 #endif
1037   {"remote-option",   'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1038   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1039   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
1040   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
1041   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
1042   /* All the following options switch us into daemon-mode option-parsing. */
1043   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1044   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1045   {"dparam",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1046   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1047   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1048   {0,0,0,0, 0, 0, 0}
1049 };
1050
1051 static void daemon_usage(enum logcode F)
1052 {
1053   print_rsync_version(F);
1054
1055   rprintf(F,"\n");
1056   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
1057   rprintf(F,"     --address=ADDRESS       bind to the specified address\n");
1058   rprintf(F,"     --bwlimit=RATE          limit socket I/O bandwidth\n");
1059   rprintf(F,"     --config=FILE           specify alternate rsyncd.conf file\n");
1060   rprintf(F," -M, --dparam=OVERRIDE       override global daemon config parameter\n");
1061   rprintf(F,"     --no-detach             do not detach from the parent\n");
1062   rprintf(F,"     --port=PORT             listen on alternate port number\n");
1063   rprintf(F,"     --log-file=FILE         override the \"log file\" setting\n");
1064   rprintf(F,"     --log-file-format=FMT   override the \"log format\" setting\n");
1065   rprintf(F,"     --sockopts=OPTIONS      specify custom TCP options\n");
1066   rprintf(F," -v, --verbose               increase verbosity\n");
1067   rprintf(F," -4, --ipv4                  prefer IPv4\n");
1068   rprintf(F," -6, --ipv6                  prefer IPv6\n");
1069   rprintf(F,"     --help                  show this help screen\n");
1070
1071   rprintf(F,"\n");
1072   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
1073   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
1074 }
1075
1076 static struct poptOption long_daemon_options[] = {
1077   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
1078   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1079   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
1080   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
1081   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
1082   {"dparam",          'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1083   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1084   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1085   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
1086   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
1087   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
1088   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
1089   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1090   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1091   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1092   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
1093   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1094   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
1095   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1096   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1097   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
1098   {0,0,0,0, 0, 0, 0}
1099 };
1100
1101
1102 static char err_buf[200];
1103
1104
1105 /**
1106  * Store the option error message, if any, so that we can log the
1107  * connection attempt (which requires parsing the options), and then
1108  * show the error later on.
1109  **/
1110 void option_error(void)
1111 {
1112         if (!err_buf[0]) {
1113                 strlcpy(err_buf, "Error parsing options: option may "
1114                         "be supported on client but not on server?\n",
1115                         sizeof err_buf);
1116         }
1117
1118         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
1119         msleep(20);
1120 }
1121
1122
1123 /**
1124  * Tweak the option table to disable all options that the rsyncd.conf
1125  * file has told us to refuse.
1126  **/
1127 static void set_refuse_options(char *bp)
1128 {
1129         struct poptOption *op;
1130         char *cp, shortname[2];
1131         int is_wild, found_match;
1132
1133         shortname[1] = '\0';
1134
1135         while (1) {
1136                 while (*bp == ' ') bp++;
1137                 if (!*bp)
1138                         break;
1139                 if ((cp = strchr(bp, ' ')) != NULL)
1140                         *cp= '\0';
1141                 is_wild = strpbrk(bp, "*?[") != NULL;
1142                 found_match = 0;
1143                 for (op = long_options; ; op++) {
1144                         *shortname = op->shortName;
1145                         if (!op->longName && !*shortname)
1146                                 break;
1147                         if ((op->longName && wildmatch(bp, op->longName))
1148                             || (*shortname && wildmatch(bp, shortname))) {
1149                                 if (op->argInfo == POPT_ARG_VAL)
1150                                         op->argInfo = POPT_ARG_NONE;
1151                                 op->val = (op - long_options) + OPT_REFUSED_BASE;
1152                                 found_match = 1;
1153                                 /* These flags are set to let us easily check
1154                                  * an implied option later in the code. */
1155                                 switch (*shortname) {
1156                                 case 'r': case 'd': case 'l': case 'p':
1157                                 case 't': case 'g': case 'o': case 'D':
1158                                         refused_archive_part = op->val;
1159                                         break;
1160                                 case 'z':
1161                                         refused_compress = op->val;
1162                                         break;
1163                                 case '\0':
1164                                         if (wildmatch("delete", op->longName))
1165                                                 refused_delete = op->val;
1166                                         else if (wildmatch("delete-before", op->longName))
1167                                                 refused_delete_before = op->val;
1168                                         else if (wildmatch("delete-during", op->longName))
1169                                                 refused_delete_during = op->val;
1170                                         else if (wildmatch("partial", op->longName))
1171                                                 refused_partial = op->val;
1172                                         else if (wildmatch("progress", op->longName))
1173                                                 refused_progress = op->val;
1174                                         else if (wildmatch("inplace", op->longName))
1175                                                 refused_inplace = op->val;
1176                                         else if (wildmatch("no-iconv", op->longName))
1177                                                 refused_no_iconv = op->val;
1178                                         break;
1179                                 }
1180                                 if (!is_wild)
1181                                         break;
1182                         }
1183                 }
1184                 if (!found_match) {
1185                         rprintf(FLOG, "No match for refuse-options string \"%s\"\n",
1186                                 bp);
1187                 }
1188                 if (!cp)
1189                         break;
1190                 *cp = ' ';
1191                 bp = cp + 1;
1192         }
1193 }
1194
1195
1196 static int count_args(const char **argv)
1197 {
1198         int i = 0;
1199
1200         if (argv) {
1201                 while (argv[i] != NULL)
1202                         i++;
1203         }
1204
1205         return i;
1206 }
1207
1208
1209 static OFF_T parse_size_arg(char **size_arg, char def_suf)
1210 {
1211         int reps, mult, make_compatible = 0;
1212         const char *arg;
1213         OFF_T size = 1;
1214
1215         for (arg = *size_arg; isDigit(arg); arg++) {}
1216         if (*arg == '.')
1217                 for (arg++; isDigit(arg); arg++) {}
1218         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
1219         case 'b': case 'B':
1220                 reps = 0;
1221                 break;
1222         case 'k': case 'K':
1223                 reps = 1;
1224                 break;
1225         case 'm': case 'M':
1226                 reps = 2;
1227                 break;
1228         case 'g': case 'G':
1229                 reps = 3;
1230                 break;
1231         default:
1232                 return -1;
1233         }
1234         if (*arg == 'b' || *arg == 'B')
1235                 mult = 1000, make_compatible = 1, arg++;
1236         else if (!*arg || *arg == '+' || *arg == '-')
1237                 mult = 1024;
1238         else if (strncasecmp(arg, "ib", 2) == 0)
1239                 mult = 1024, arg += 2;
1240         else
1241                 return -1;
1242         while (reps--)
1243                 size *= mult;
1244         size *= atof(*size_arg);
1245         if ((*arg == '+' || *arg == '-') && arg[1] == '1')
1246                 size += atoi(arg), make_compatible = 1, arg += 2;
1247         if (*arg)
1248                 return -1;
1249         if (size > 0 && make_compatible && def_suf == 'b') {
1250                 /* We convert this manually because we may need %lld precision,
1251                  * and that's not a portable sprintf() escape. */
1252                 char buf[128], *s = buf + sizeof buf - 1;
1253                 OFF_T num = size;
1254                 *s = '\0';
1255                 while (num) {
1256                         *--s = (char)(num % 10) + '0';
1257                         num /= 10;
1258                 }
1259                 if (!(*size_arg = strdup(s)))
1260                         out_of_memory("parse_size_arg");
1261         }
1262         return size;
1263 }
1264
1265
1266 static void create_refuse_error(int which)
1267 {
1268         /* The "which" value is the index + OPT_REFUSED_BASE. */
1269         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
1270         int n = snprintf(err_buf, sizeof err_buf,
1271                          "The server is configured to refuse --%s\n",
1272                          op->longName) - 1;
1273         if (op->shortName) {
1274                 snprintf(err_buf + n, sizeof err_buf - n,
1275                          " (-%c)\n", op->shortName);
1276         }
1277 }
1278
1279
1280 /**
1281  * Process command line arguments.  Called on both local and remote.
1282  *
1283  * @retval 1 if all options are OK; with globals set to appropriate
1284  * values
1285  *
1286  * @retval 0 on error, with err_buf containing an explanation
1287  **/
1288 int parse_arguments(int *argc_p, const char ***argv_p)
1289 {
1290         static poptContext pc;
1291         char *ref = lp_refuse_options(module_id);
1292         const char *arg, **argv = *argv_p;
1293         int argc = *argc_p;
1294         int opt;
1295
1296         if (ref && *ref)
1297                 set_refuse_options(ref);
1298         if (am_daemon) {
1299                 set_refuse_options("log-file*");
1300 #ifdef ICONV_OPTION
1301                 if (!*lp_charset(module_id))
1302                         set_refuse_options("iconv");
1303 #endif
1304         }
1305
1306 #ifdef ICONV_OPTION
1307         if (!am_daemon && protect_args <= 0 && (arg = getenv("RSYNC_ICONV")) != NULL && *arg)
1308                 iconv_opt = strdup(arg);
1309 #endif
1310
1311         /* TODO: Call poptReadDefaultConfig; handle errors. */
1312
1313         /* The context leaks in case of an error, but if there's a
1314          * problem we always exit anyhow. */
1315         if (pc)
1316                 poptFreeContext(pc);
1317         pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1318         if (!am_server)
1319                 poptReadDefaultConfig(pc, 0);
1320
1321         while ((opt = poptGetNextOpt(pc)) != -1) {
1322                 /* most options are handled automatically by popt;
1323                  * only special cases are returned and listed here. */
1324
1325                 switch (opt) {
1326                 case OPT_VERSION:
1327                         print_rsync_version(FINFO);
1328                         exit_cleanup(0);
1329
1330                 case OPT_SERVER:
1331                         if (!am_server) {
1332                                 /* Disable popt aliases on the server side and
1333                                  * then start parsing the options again. */
1334                                 poptFreeContext(pc);
1335                                 pc = poptGetContext(RSYNC_NAME, argc, argv,
1336                                                     long_options, 0);
1337                                 am_server = 1;
1338                         }
1339 #ifdef ICONV_OPTION
1340                         iconv_opt = NULL;
1341 #endif
1342                         break;
1343
1344                 case OPT_SENDER:
1345                         if (!am_server) {
1346                                 usage(FERROR);
1347                                 exit_cleanup(RERR_SYNTAX);
1348                         }
1349                         am_sender = 1;
1350                         break;
1351
1352                 case OPT_DAEMON:
1353                         if (am_daemon) {
1354                                 strlcpy(err_buf,
1355                                         "Attempt to hack rsync thwarted!\n",
1356                                         sizeof err_buf);
1357                                 return 0;
1358                         }
1359 #ifdef ICONV_OPTION
1360                         iconv_opt = NULL;
1361 #endif
1362                         protect_args = 0;
1363                         poptFreeContext(pc);
1364                         pc = poptGetContext(RSYNC_NAME, argc, argv,
1365                                             long_daemon_options, 0);
1366                         while ((opt = poptGetNextOpt(pc)) != -1) {
1367                                 char **cpp;
1368                                 switch (opt) {
1369                                 case 'h':
1370                                         daemon_usage(FINFO);
1371                                         exit_cleanup(0);
1372
1373                                 case 'M':
1374                                         arg = poptGetOptArg(pc);
1375                                         if (!strchr(arg, '=')) {
1376                                                 rprintf(FERROR,
1377                                                     "--dparam value is missing an '=': %s\n",
1378                                                     arg);
1379                                                 goto daemon_error;
1380                                         }
1381                                         cpp = EXPAND_ITEM_LIST(&dparam_list, char *, 4);
1382                                         *cpp = strdup(arg);
1383                                         break;
1384
1385                                 case 'v':
1386                                         verbose++;
1387                                         break;
1388
1389                                 default:
1390                                         rprintf(FERROR,
1391                                             "rsync: %s: %s (in daemon mode)\n",
1392                                             poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1393                                             poptStrerror(opt));
1394                                         goto daemon_error;
1395                                 }
1396                         }
1397
1398                         if (dparam_list.count && !set_dparams(1))
1399                                 exit_cleanup(RERR_SYNTAX);
1400
1401                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1402                                 snprintf(err_buf, sizeof err_buf,
1403                                          "the --temp-dir path is WAY too long.\n");
1404                                 return 0;
1405                         }
1406
1407                         if (!daemon_opt) {
1408                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
1409                             daemon_error:
1410                                 rprintf(FERROR,
1411                                     "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
1412                                 exit_cleanup(RERR_SYNTAX);
1413                         }
1414
1415                         *argv_p = argv = poptGetArgs(pc);
1416                         *argc_p = argc = count_args(argv);
1417                         am_starting_up = 0;
1418                         daemon_opt = 0;
1419                         am_daemon = 1;
1420                         return 1;
1421
1422                 case OPT_MODIFY_WINDOW:
1423                         /* The value has already been set by popt, but
1424                          * we need to remember that we're using a
1425                          * non-default setting. */
1426                         modify_window_set = 1;
1427                         break;
1428
1429                 case OPT_FILTER:
1430                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1431                                         rule_template(0), 0);
1432                         break;
1433
1434                 case OPT_EXCLUDE:
1435                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1436                                         rule_template(0), XFLG_OLD_PREFIXES);
1437                         break;
1438
1439                 case OPT_INCLUDE:
1440                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1441                                         rule_template(FILTRULE_INCLUDE), XFLG_OLD_PREFIXES);
1442                         break;
1443
1444                 case OPT_EXCLUDE_FROM:
1445                 case OPT_INCLUDE_FROM:
1446                         arg = poptGetOptArg(pc);
1447                         if (sanitize_paths)
1448                                 arg = sanitize_path(NULL, arg, NULL, 0, SP_DEFAULT);
1449                         if (daemon_filter_list.head) {
1450                                 int rej;
1451                                 char *cp = strdup(arg);
1452                                 if (!cp)
1453                                         out_of_memory("parse_arguments");
1454                                 if (!*cp)
1455                                         rej = 1;
1456                                 else {
1457                                         char *dir = cp + (*cp == '/' ? module_dirlen : 0);
1458                                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1459                                         rej = check_filter(&daemon_filter_list, FLOG, dir, 0) < 0;
1460                                 }
1461                                 free(cp);
1462                                 if (rej)
1463                                         goto options_rejected;
1464                         }
1465                         parse_filter_file(&filter_list, arg,
1466                                 rule_template(opt == OPT_INCLUDE_FROM ? FILTRULE_INCLUDE : 0),
1467                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
1468                         break;
1469
1470                 case 'a':
1471                         if (refused_archive_part) {
1472                                 create_refuse_error(refused_archive_part);
1473                                 return 0;
1474                         }
1475                         if (!recurse) /* preserve recurse == 2 */
1476                                 recurse = 1;
1477 #ifdef SUPPORT_LINKS
1478                         preserve_links = 1;
1479 #endif
1480                         preserve_perms = 1;
1481                         preserve_times = 1;
1482                         preserve_gid = 1;
1483                         preserve_uid = 1;
1484                         preserve_devices = 1;
1485                         preserve_specials = 1;
1486                         break;
1487
1488                 case 'D':
1489                         preserve_devices = preserve_specials = 1;
1490                         break;
1491
1492                 case OPT_NO_D:
1493                         preserve_devices = preserve_specials = 0;
1494                         break;
1495
1496                 case 'h':
1497                         human_readable++;
1498                         break;
1499
1500                 case 'H':
1501                         preserve_hard_links++;
1502                         break;
1503
1504                 case 'i':
1505                         itemize_changes++;
1506                         break;
1507
1508                 case 'v':
1509                         verbose++;
1510                         break;
1511
1512                 case 'y':
1513                         fuzzy_basis++;
1514                         break;
1515
1516                 case 'q':
1517                         quiet++;
1518                         break;
1519
1520                 case 'x':
1521                         one_file_system++;
1522                         break;
1523
1524                 case 'F':
1525                         switch (++F_option_cnt) {
1526                         case 1:
1527                                 parse_filter_str(&filter_list,": /.rsync-filter",rule_template(0),0);
1528                                 break;
1529                         case 2:
1530                                 parse_filter_str(&filter_list,"- .rsync-filter",rule_template(0),0);
1531                                 break;
1532                         }
1533                         break;
1534
1535                 case 'P':
1536                         if (refused_partial || refused_progress) {
1537                                 create_refuse_error(refused_partial
1538                                     ? refused_partial : refused_progress);
1539                                 return 0;
1540                         }
1541                         do_progress = 1;
1542                         keep_partial = 1;
1543                         break;
1544
1545                 case 'z':
1546                         if (def_compress_level < Z_DEFAULT_COMPRESSION
1547                          || def_compress_level > Z_BEST_COMPRESSION) {
1548                                 snprintf(err_buf, sizeof err_buf,
1549                                         "--compress-level value is invalid: %d\n",
1550                                         def_compress_level);
1551                                 return 0;
1552                         }
1553                         do_compression = def_compress_level != Z_NO_COMPRESSION;
1554                         if (do_compression && refused_compress) {
1555                                 create_refuse_error(refused_compress);
1556                                 return 0;
1557                         }
1558                         break;
1559
1560                 case 'M':
1561                         arg = poptGetOptArg(pc);
1562                         if (*arg != '-') {
1563                                 snprintf(err_buf, sizeof err_buf,
1564                                         "Remote option must start with a dash: %s\n", arg);
1565                                 return 0;
1566                         }
1567                         if (remote_option_cnt+2 >= remote_option_alloc) {
1568                                 remote_option_alloc += 16;
1569                                 remote_options = realloc_array(remote_options,
1570                                                         const char *, remote_option_alloc);
1571                                 if (!remote_options)
1572                                         out_of_memory("parse_arguments");
1573                                 if (!remote_option_cnt)
1574                                         remote_options[0] = "ARG0";
1575                         }
1576                         remote_options[++remote_option_cnt] = arg;
1577                         remote_options[remote_option_cnt+1] = NULL;
1578                         break;
1579
1580                 case OPT_WRITE_BATCH:
1581                         /* batch_name is already set */
1582                         write_batch = 1;
1583                         break;
1584
1585                 case OPT_ONLY_WRITE_BATCH:
1586                         /* batch_name is already set */
1587                         write_batch = -1;
1588                         break;
1589
1590                 case OPT_READ_BATCH:
1591                         /* batch_name is already set */
1592                         read_batch = 1;
1593                         break;
1594
1595                 case OPT_NO_ICONV:
1596 #ifdef ICONV_OPTION
1597                         iconv_opt = NULL;
1598 #endif
1599                         break;
1600
1601                 case OPT_MAX_SIZE:
1602                         if ((max_size = parse_size_arg(&max_size_arg, 'b')) < 0) {
1603                                 snprintf(err_buf, sizeof err_buf,
1604                                         "--max-size value is invalid: %s\n",
1605                                         max_size_arg);
1606                                 return 0;
1607                         }
1608                         break;
1609
1610                 case OPT_MIN_SIZE:
1611                         if ((min_size = parse_size_arg(&min_size_arg, 'b')) < 0) {
1612                                 snprintf(err_buf, sizeof err_buf,
1613                                         "--min-size value is invalid: %s\n",
1614                                         min_size_arg);
1615                                 return 0;
1616                         }
1617                         break;
1618
1619                 case OPT_BWLIMIT:
1620                         {
1621                                 OFF_T limit = parse_size_arg(&bwlimit_arg, 'K');
1622                                 if (limit < 0) {
1623                                         snprintf(err_buf, sizeof err_buf,
1624                                                 "--bwlimit value is invalid: %s\n", bwlimit_arg);
1625                                         return 0;
1626                                 }
1627                                 bwlimit = (limit + 512) / 1024;
1628                                 if (limit && !bwlimit) {
1629                                         snprintf(err_buf, sizeof err_buf,
1630                                                 "--bwlimit value is too small: %s\n", bwlimit_arg);
1631                                         return 0;
1632                                 }
1633                         }
1634                         break;
1635
1636                 case OPT_APPEND:
1637                         if (am_server)
1638                                 append_mode++;
1639                         else
1640                                 append_mode = 1;
1641                         break;
1642
1643                 case OPT_LINK_DEST:
1644 #ifdef SUPPORT_HARD_LINKS
1645                         link_dest = 1;
1646                         dest_option = "--link-dest";
1647                         goto set_dest_dir;
1648 #else
1649                         snprintf(err_buf, sizeof err_buf,
1650                                  "hard links are not supported on this %s\n",
1651                                  am_server ? "server" : "client");
1652                         return 0;
1653 #endif
1654
1655                 case OPT_COPY_DEST:
1656                         copy_dest = 1;
1657                         dest_option = "--copy-dest";
1658                         goto set_dest_dir;
1659
1660                 case OPT_COMPARE_DEST:
1661                         compare_dest = 1;
1662                         dest_option = "--compare-dest";
1663                 set_dest_dir:
1664                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1665                                 snprintf(err_buf, sizeof err_buf,
1666                                         "ERROR: at most %d %s args may be specified\n",
1667                                         MAX_BASIS_DIRS, dest_option);
1668                                 return 0;
1669                         }
1670                         /* We defer sanitizing this arg until we know what
1671                          * our destination directory is going to be. */
1672                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1673                         break;
1674
1675                 case OPT_CHMOD:
1676                         arg = poptGetOptArg(pc);
1677                         if (!parse_chmod(arg, &chmod_modes)) {
1678                                 snprintf(err_buf, sizeof err_buf,
1679                                     "Invalid argument passed to --chmod (%s)\n",
1680                                     arg);
1681                                 return 0;
1682                         }
1683                         break;
1684
1685                 case OPT_INFO:
1686                         arg = poptGetOptArg(pc);
1687                         parse_output_words(info_words, info_levels, arg, USER_PRIORITY);
1688                         break;
1689
1690                 case OPT_DEBUG:
1691                         arg = poptGetOptArg(pc);
1692                         parse_output_words(debug_words, debug_levels, arg, USER_PRIORITY);
1693                         break;
1694
1695                 case OPT_USERMAP:
1696                         if (usermap) {
1697                                 if (usermap_via_chown) {
1698                                         snprintf(err_buf, sizeof err_buf,
1699                                             "--usermap conflicts with prior --chown.\n");
1700                                         return 0;
1701                                 }
1702                                 snprintf(err_buf, sizeof err_buf,
1703                                     "You can only specify --usermap once.\n");
1704                                 return 0;
1705                         }
1706                         usermap = (char *)poptGetOptArg(pc);
1707                         usermap_via_chown = False;
1708                         break;
1709
1710                 case OPT_GROUPMAP:
1711                         if (groupmap) {
1712                                 if (groupmap_via_chown) {
1713                                         snprintf(err_buf, sizeof err_buf,
1714                                             "--groupmap conflicts with prior --chown.\n");
1715                                         return 0;
1716                                 }
1717                                 snprintf(err_buf, sizeof err_buf,
1718                                     "You can only specify --groupmap once.\n");
1719                                 return 0;
1720                         }
1721                         groupmap = (char *)poptGetOptArg(pc);
1722                         groupmap_via_chown = False;
1723                         break;
1724
1725                 case OPT_CHOWN: {
1726                         const char *chown = poptGetOptArg(pc);
1727                         int len;
1728                         if ((arg = strchr(chown, ':')) != NULL)
1729                                 len = arg++ - chown;
1730                         else
1731                                 len = strlen(chown);
1732                         if (len) {
1733                                 if (usermap) {
1734                                         if (!usermap_via_chown) {
1735                                                 snprintf(err_buf, sizeof err_buf,
1736                                                     "--chown conflicts with prior --usermap.\n");
1737                                                 return 0;
1738                                         }
1739                                         snprintf(err_buf, sizeof err_buf,
1740                                             "You can only specify a user-affecting --chown once.\n");
1741                                         return 0;
1742                                 }
1743                                 if (asprintf(&usermap, "*:%.*s", len, chown) < 0)
1744                                         out_of_memory("parse_arguments");
1745                                 usermap_via_chown = True;
1746                         }
1747                         if (arg && *arg) {
1748                                 if (groupmap) {
1749                                         if (!groupmap_via_chown) {
1750                                                 snprintf(err_buf, sizeof err_buf,
1751                                                     "--chown conflicts with prior --groupmap.\n");
1752                                                 return 0;
1753                                         }
1754                                         snprintf(err_buf, sizeof err_buf,
1755                                             "You can only specify a group-affecting --chown once.\n");
1756                                         return 0;
1757                                 }
1758                                 if (asprintf(&groupmap, "*:%s", arg) < 0)
1759                                         out_of_memory("parse_arguments");
1760                                 groupmap_via_chown = True;
1761                         }
1762                         break;
1763                 }
1764
1765                 case OPT_HELP:
1766                         usage(FINFO);
1767                         exit_cleanup(0);
1768
1769                 case 'A':
1770 #ifdef SUPPORT_ACLS
1771                         preserve_acls = 1;
1772                         preserve_perms = 1;
1773                         break;
1774 #else
1775                         /* FIXME: this should probably be ignored with a
1776                          * warning and then countermeasures taken to
1777                          * restrict group and other access in the presence
1778                          * of any more restrictive ACLs, but this is safe
1779                          * for now */
1780                         snprintf(err_buf,sizeof(err_buf),
1781                                  "ACLs are not supported on this %s\n",
1782                                  am_server ? "server" : "client");
1783                         return 0;
1784 #endif
1785
1786                 case 'X':
1787 #ifdef SUPPORT_XATTRS
1788                         preserve_xattrs++;
1789                         break;
1790 #else
1791                         snprintf(err_buf,sizeof(err_buf),
1792                                  "extended attributes are not supported on this %s\n",
1793                                  am_server ? "server" : "client");
1794                         return 0;
1795 #endif
1796
1797                 default:
1798                         /* A large opt value means that set_refuse_options()
1799                          * turned this option off. */
1800                         if (opt >= OPT_REFUSED_BASE) {
1801                                 create_refuse_error(opt);
1802                                 return 0;
1803                         }
1804                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
1805                                  am_server ? "on remote machine: " : "",
1806                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1807                                  poptStrerror(opt));
1808                         return 0;
1809                 }
1810         }
1811
1812         if (protect_args < 0) {
1813                 if (am_server)
1814                         protect_args = 0;
1815                 else if ((arg = getenv("RSYNC_PROTECT_ARGS")) != NULL && *arg)
1816                         protect_args = atoi(arg) ? 1 : 0;
1817                 else {
1818 #ifdef RSYNC_USE_PROTECTED_ARGS
1819                         protect_args = 1;
1820 #else
1821                         protect_args = 0;
1822 #endif
1823                 }
1824         }
1825
1826         if (human_readable > 1 && argc == 2 && !am_server) {
1827                 /* Allow the old meaning of 'h' (--help) on its own. */
1828                 usage(FINFO);
1829                 exit_cleanup(0);
1830         }
1831
1832 #ifdef HAVE_SETVBUF
1833         if (outbuf_mode && !am_server) {
1834                 int mode = *(uchar *)outbuf_mode;
1835                 if (islower(mode))
1836                         mode = toupper(mode);
1837                 fflush(stdout); /* Just in case... */
1838                 switch (mode) {
1839                 case 'N': /* None */
1840                 case 'U': /* Unbuffered */
1841                         mode = _IONBF;
1842                         break;
1843                 case 'L': /* Line */
1844                         mode = _IOLBF;
1845                         break;
1846                 case 'B': /* Block */
1847                 case 'F': /* Full */
1848                         mode = _IOFBF;
1849                         break;
1850                 default:
1851                         snprintf(err_buf, sizeof err_buf,
1852                                 "Invalid --outbuf setting -- specify N, L, or B.\n");
1853                         return 0;
1854                 }
1855                 setvbuf(stdout, (char *)NULL, mode, 0);
1856         }
1857
1858         if (msgs2stderr) {
1859                 /* Make stderr line buffered for better sharing of the stream. */
1860                 fflush(stderr); /* Just in case... */
1861                 setvbuf(stderr, (char *)NULL, _IOLBF, 0);
1862         }
1863 #endif
1864
1865         set_output_verbosity(verbose, DEFAULT_PRIORITY);
1866
1867         if (do_stats) {
1868                 parse_output_words(info_words, info_levels,
1869                         verbose > 1 ? "stats3" : "stats2", DEFAULT_PRIORITY);
1870         }
1871
1872 #ifdef ICONV_OPTION
1873         if (iconv_opt && protect_args != 2) {
1874                 if (!am_server && strcmp(iconv_opt, "-") == 0)
1875                         iconv_opt = NULL;
1876                 else
1877                         need_unsorted_flist = 1;
1878         }
1879         if (refused_no_iconv && !iconv_opt) {
1880                 create_refuse_error(refused_no_iconv);
1881                 return 0;
1882         }
1883 #endif
1884
1885         if (fuzzy_basis > 1)
1886                 fuzzy_basis = basis_dir_cnt + 1;
1887
1888         if (protect_args == 1 && am_server)
1889                 return 1;
1890
1891         *argv_p = argv = poptGetArgs(pc);
1892         *argc_p = argc = count_args(argv);
1893
1894 #ifndef SUPPORT_LINKS
1895         if (preserve_links && !am_sender) {
1896                 snprintf(err_buf, sizeof err_buf,
1897                          "symlinks are not supported on this %s\n",
1898                          am_server ? "server" : "client");
1899                 return 0;
1900         }
1901 #endif
1902
1903 #ifndef SUPPORT_HARD_LINKS
1904         if (preserve_hard_links) {
1905                 snprintf(err_buf, sizeof err_buf,
1906                          "hard links are not supported on this %s\n",
1907                          am_server ? "server" : "client");
1908                 return 0;
1909         }
1910 #endif
1911
1912 #ifdef SUPPORT_XATTRS
1913         if (am_root < 0 && preserve_xattrs > 1) {
1914                 snprintf(err_buf, sizeof err_buf,
1915                          "--fake-super conflicts with -XX\n");
1916                 return 0;
1917         }
1918 #else
1919         if (am_root < 0) {
1920                 snprintf(err_buf, sizeof err_buf,
1921                          "--fake-super requires an rsync with extended attributes enabled\n");
1922                 return 0;
1923         }
1924 #endif
1925
1926         if (block_size > MAX_BLOCK_SIZE) {
1927                 snprintf(err_buf, sizeof err_buf,
1928                          "--block-size=%lu is too large (max: %u)\n", block_size, MAX_BLOCK_SIZE);
1929                 return 0;
1930         }
1931
1932         if (write_batch && read_batch) {
1933                 snprintf(err_buf, sizeof err_buf,
1934                         "--write-batch and --read-batch can not be used together\n");
1935                 return 0;
1936         }
1937         if (write_batch > 0 || read_batch) {
1938                 if (am_server) {
1939                         rprintf(FINFO,
1940                                 "ignoring --%s-batch option sent to server\n",
1941                                 write_batch ? "write" : "read");
1942                         /* We don't actually exit_cleanup(), so that we can
1943                          * still service older version clients that still send
1944                          * batch args to server. */
1945                         read_batch = write_batch = 0;
1946                         batch_name = NULL;
1947                 } else if (dry_run)
1948                         write_batch = 0;
1949         } else if (write_batch < 0 && dry_run)
1950                 write_batch = 0;
1951         if (read_batch && files_from) {
1952                 snprintf(err_buf, sizeof err_buf,
1953                         "--read-batch cannot be used with --files-from\n");
1954                 return 0;
1955         }
1956         if (read_batch && remove_source_files) {
1957                 snprintf(err_buf, sizeof err_buf,
1958                         "--read-batch cannot be used with --remove-%s-files\n",
1959                         remove_source_files == 1 ? "source" : "sent");
1960                 return 0;
1961         }
1962         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
1963                 snprintf(err_buf, sizeof err_buf,
1964                         "the batch-file name must be %d characters or less.\n",
1965                         MAX_BATCH_NAME_LEN);
1966                 return 0;
1967         }
1968
1969         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1970                 snprintf(err_buf, sizeof err_buf,
1971                          "the --temp-dir path is WAY too long.\n");
1972                 return 0;
1973         }
1974
1975         if (max_delete < 0 && max_delete != INT_MIN) {
1976                 /* Negative numbers are treated as "no deletions". */
1977                 max_delete = 0;
1978         }
1979
1980         if (compare_dest + copy_dest + link_dest > 1) {
1981                 snprintf(err_buf, sizeof err_buf,
1982                         "You may not mix --compare-dest, --copy-dest, and --link-dest.\n");
1983                 return 0;
1984         }
1985
1986         if (files_from) {
1987                 if (recurse == 1) /* preserve recurse == 2 */
1988                         recurse = 0;
1989                 if (xfer_dirs < 0)
1990                         xfer_dirs = 1;
1991         }
1992
1993         if (argc < 2 && !read_batch && !am_server)
1994                 list_only |= 1;
1995
1996         if (xfer_dirs >= 4) {
1997                 parse_filter_str(&filter_list, "- /*/*", rule_template(0), 0);
1998                 recurse = xfer_dirs = 1;
1999         } else if (recurse)
2000                 xfer_dirs = 1;
2001         else if (xfer_dirs < 0)
2002                 xfer_dirs = list_only ? 1 : 0;
2003
2004         if (relative_paths < 0)
2005                 relative_paths = files_from? 1 : 0;
2006         if (!relative_paths)
2007                 implied_dirs = 0;
2008
2009         if (delete_before + !!delete_during + delete_after > 1) {
2010                 snprintf(err_buf, sizeof err_buf,
2011                         "You may not combine multiple --delete-WHEN options.\n");
2012                 return 0;
2013         }
2014         if (delete_before || delete_during || delete_after)
2015                 delete_mode = 1;
2016         else if (delete_mode || delete_excluded) {
2017                 /* Only choose now between before & during if one is refused. */
2018                 if (refused_delete_before) {
2019                         if (!refused_delete_during)
2020                                 delete_during = 1;
2021                         else {
2022                                 create_refuse_error(refused_delete_before);
2023                                 return 0;
2024                         }
2025                 } else if (refused_delete_during)
2026                         delete_before = 1;
2027                 delete_mode = 1;
2028         }
2029         if (!xfer_dirs && delete_mode) {
2030                 snprintf(err_buf, sizeof err_buf,
2031                         "--delete does not work without --recursive (-r) or --dirs (-d).\n");
2032                 return 0;
2033         }
2034
2035         if (missing_args == 3) /* simplify if both options were specified */
2036                 missing_args = 2;
2037         if (refused_delete && (delete_mode || missing_args == 2)) {
2038                 create_refuse_error(refused_delete);
2039                 return 0;
2040         }
2041
2042         if (remove_source_files) {
2043                 /* We only want to infer this refusal of --remove-source-files
2044                  * via the refusal of "delete", not any of the "delete-FOO"
2045                  * options. */
2046                 if (refused_delete && am_sender) {
2047                         create_refuse_error(refused_delete);
2048                         return 0;
2049                 }
2050                 need_messages_from_generator = 1;
2051         }
2052
2053         if (munge_symlinks && !am_daemon) {
2054                 STRUCT_STAT st;
2055                 char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */
2056                 strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */
2057                 if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) {
2058                         rprintf(FERROR, "Symlink munging is unsafe when a %s directory exists.\n",
2059                                 prefix);
2060                         exit_cleanup(RERR_UNSUPPORTED);
2061                 }
2062         }
2063
2064         if (sanitize_paths) {
2065                 int i;
2066                 for (i = argc; i-- > 0; )
2067                         argv[i] = sanitize_path(NULL, argv[i], "", 0, SP_KEEP_DOT_DIRS);
2068                 if (tmpdir)
2069                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, SP_DEFAULT);
2070                 if (backup_dir)
2071                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, SP_DEFAULT);
2072         }
2073         if (daemon_filter_list.head && !am_sender) {
2074                 filter_rule_list *elp = &daemon_filter_list;
2075                 if (tmpdir) {
2076                         char *dir;
2077                         if (!*tmpdir)
2078                                 goto options_rejected;
2079                         dir = tmpdir + (*tmpdir == '/' ? module_dirlen : 0);
2080                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2081                         if (check_filter(elp, FLOG, dir, 1) < 0)
2082                                 goto options_rejected;
2083                 }
2084                 if (backup_dir) {
2085                         char *dir;
2086                         if (!*backup_dir)
2087                                 goto options_rejected;
2088                         dir = backup_dir + (*backup_dir == '/' ? module_dirlen : 0);
2089                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2090                         if (check_filter(elp, FLOG, dir, 1) < 0)
2091                                 goto options_rejected;
2092                 }
2093         }
2094
2095         if (!backup_suffix)
2096                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
2097         backup_suffix_len = strlen(backup_suffix);
2098         if (strchr(backup_suffix, '/') != NULL) {
2099                 snprintf(err_buf, sizeof err_buf,
2100                         "--suffix cannot contain slashes: %s\n",
2101                         backup_suffix);
2102                 return 0;
2103         }
2104         if (backup_dir) {
2105                 size_t len;
2106                 while (*backup_dir == '.' && backup_dir[1] == '/')
2107                         backup_dir += 2;
2108                 if (*backup_dir == '.' && backup_dir[1] == '\0')
2109                         backup_dir++;
2110                 len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
2111                 if (len > sizeof backup_dir_buf - 128) {
2112                         snprintf(err_buf, sizeof err_buf,
2113                                 "the --backup-dir path is WAY too long.\n");
2114                         return 0;
2115                 }
2116                 backup_dir_len = (int)len;
2117                 if (!backup_dir_len) {
2118                         backup_dir_len = -1;
2119                         backup_dir = NULL;
2120                 } else if (backup_dir_buf[backup_dir_len - 1] != '/') {
2121                         backup_dir_buf[backup_dir_len++] = '/';
2122                         backup_dir_buf[backup_dir_len] = '\0';
2123                 }
2124                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
2125         }
2126         if (backup_dir) {
2127                 /* No need for a suffix or a protect rule. */
2128         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
2129                 snprintf(err_buf, sizeof err_buf,
2130                         "--suffix cannot be empty %s\n", backup_dir_len < 0
2131                         ? "when --backup-dir is the same as the dest dir"
2132                         : "without a --backup-dir");
2133                 return 0;
2134         } else if (make_backups && delete_mode && !delete_excluded && !am_server) {
2135                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
2136                         "P *%s", backup_suffix);
2137                 parse_filter_str(&filter_list, backup_dir_buf, rule_template(0), 0);
2138         }
2139
2140         if (preserve_times) {
2141                 preserve_times = PRESERVE_FILE_TIMES;
2142                 if (!omit_dir_times)
2143                         preserve_times |= PRESERVE_DIR_TIMES;
2144 #ifdef CAN_SET_SYMLINK_TIMES
2145                 if (!omit_link_times)
2146                         preserve_times |= PRESERVE_LINK_TIMES;
2147 #endif
2148         }
2149
2150         if (make_backups && !backup_dir) {
2151                 omit_dir_times = 0; /* Implied, so avoid -O to sender. */
2152                 preserve_times &= ~PRESERVE_DIR_TIMES;
2153         }
2154
2155         if (stdout_format) {
2156                 if (am_server && log_format_has(stdout_format, 'I'))
2157                         stdout_format_has_i = 2;
2158                 else if (log_format_has(stdout_format, 'i'))
2159                         stdout_format_has_i = itemize_changes | 1;
2160                 if (!log_format_has(stdout_format, 'b')
2161                  && !log_format_has(stdout_format, 'c')
2162                  && !log_format_has(stdout_format, 'C'))
2163                         log_before_transfer = !am_server;
2164         } else if (itemize_changes) {
2165                 stdout_format = "%i %n%L";
2166                 stdout_format_has_i = itemize_changes;
2167                 log_before_transfer = !am_server;
2168         }
2169
2170         if (do_progress && !am_server) {
2171                 if (!log_before_transfer && INFO_EQ(NAME, 0))
2172                         parse_output_words(info_words, info_levels, "name", DEFAULT_PRIORITY);
2173                 parse_output_words(info_words, info_levels, "flist2,progress", DEFAULT_PRIORITY);
2174         }
2175
2176         if (dry_run)
2177                 do_xfers = 0;
2178
2179         set_io_timeout(io_timeout);
2180
2181         if (INFO_GTE(NAME, 1) && !stdout_format) {
2182                 stdout_format = "%n%L";
2183                 log_before_transfer = !am_server;
2184         }
2185         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
2186                 stdout_format_has_o_or_i = 1;
2187
2188         if (logfile_name && !am_daemon) {
2189                 if (!logfile_format) {
2190                         logfile_format = "%i %n%L";
2191                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
2192                 } else {
2193                         if (log_format_has(logfile_format, 'i'))
2194                                 logfile_format_has_i = 1;
2195                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
2196                                 logfile_format_has_o_or_i = 1;
2197                 }
2198                 log_init(0);
2199         } else if (!am_daemon)
2200                 logfile_format = NULL;
2201
2202         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
2203                 bwlimit = daemon_bwlimit;
2204         if (bwlimit) {
2205                 bwlimit_writemax = (size_t)bwlimit * 128;
2206                 if (bwlimit_writemax < 512)
2207                         bwlimit_writemax = 512;
2208         }
2209
2210         if (sparse_files && inplace) {
2211                 /* Note: we don't check for this below, because --append is
2212                  * OK with --sparse (as long as redos are handled right). */
2213                 snprintf(err_buf, sizeof err_buf,
2214                          "--sparse cannot be used with --inplace\n");
2215                 return 0;
2216         }
2217
2218         if (append_mode) {
2219                 if (whole_file > 0) {
2220                         snprintf(err_buf, sizeof err_buf,
2221                                  "--append cannot be used with --whole-file\n");
2222                         return 0;
2223                 }
2224                 if (refused_inplace) {
2225                         create_refuse_error(refused_inplace);
2226                         return 0;
2227                 }
2228                 inplace = 1;
2229         }
2230
2231         if (delay_updates && !partial_dir)
2232                 partial_dir = tmp_partialdir;
2233
2234         if (inplace) {
2235 #ifdef HAVE_FTRUNCATE
2236                 if (partial_dir) {
2237                         snprintf(err_buf, sizeof err_buf,
2238                                  "--%s cannot be used with --%s\n",
2239                                  append_mode ? "append" : "inplace",
2240                                  delay_updates ? "delay-updates" : "partial-dir");
2241                         return 0;
2242                 }
2243                 /* --inplace implies --partial for refusal purposes, but we
2244                  * clear the keep_partial flag for internal logic purposes. */
2245                 if (refused_partial) {
2246                         create_refuse_error(refused_partial);
2247                         return 0;
2248                 }
2249                 keep_partial = 0;
2250 #else
2251                 snprintf(err_buf, sizeof err_buf,
2252                          "--%s is not supported on this %s\n",
2253                          append_mode ? "append" : "inplace",
2254                          am_server ? "server" : "client");
2255                 return 0;
2256 #endif
2257         } else {
2258                 if (keep_partial && !partial_dir && !am_server) {
2259                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
2260                                 partial_dir = strdup(arg);
2261                 }
2262                 if (partial_dir) {
2263                         if (*partial_dir)
2264                                 clean_fname(partial_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2265                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
2266                                 partial_dir = NULL;
2267                         if (!partial_dir && refused_partial) {
2268                                 create_refuse_error(refused_partial);
2269                                 return 0;
2270                         }
2271                         keep_partial = 1;
2272                 }
2273         }
2274
2275         if (files_from) {
2276                 char *h, *p;
2277                 int q;
2278                 if (argc > 2 || (!am_daemon && !am_server && argc == 1)) {
2279                         usage(FERROR);
2280                         exit_cleanup(RERR_SYNTAX);
2281                 }
2282                 if (strcmp(files_from, "-") == 0) {
2283                         filesfrom_fd = 0;
2284                         if (am_server)
2285                                 filesfrom_host = ""; /* reading from socket */
2286                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
2287                         if (am_server) {
2288                                 snprintf(err_buf, sizeof err_buf,
2289                                         "The --files-from sent to the server cannot specify a host.\n");
2290                                 return 0;
2291                         }
2292                         files_from = p;
2293                         filesfrom_host = h;
2294                         if (strcmp(files_from, "-") == 0) {
2295                                 snprintf(err_buf, sizeof err_buf,
2296                                         "Invalid --files-from remote filename\n");
2297                                 return 0;
2298                         }
2299                 } else {
2300                         if (sanitize_paths)
2301                                 files_from = sanitize_path(NULL, files_from, NULL, 0, SP_DEFAULT);
2302                         if (daemon_filter_list.head) {
2303                                 char *dir;
2304                                 if (!*files_from)
2305                                         goto options_rejected;
2306                                 dir = files_from + (*files_from == '/' ? module_dirlen : 0);
2307                                 clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2308                                 if (check_filter(&daemon_filter_list, FLOG, dir, 0) < 0)
2309                                         goto options_rejected;
2310                         }
2311                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
2312                         if (filesfrom_fd < 0) {
2313                                 snprintf(err_buf, sizeof err_buf,
2314                                         "failed to open files-from file %s: %s\n",
2315                                         files_from, strerror(errno));
2316                                 return 0;
2317                         }
2318                 }
2319         }
2320
2321         am_starting_up = 0;
2322
2323         return 1;
2324
2325   options_rejected:
2326         snprintf(err_buf, sizeof err_buf,
2327                 "Your options have been rejected by the server.\n");
2328         return 0;
2329 }
2330
2331
2332 /**
2333  * Construct a filtered list of options to pass through from the
2334  * client to the server.
2335  *
2336  * This involves setting options that will tell the server how to
2337  * behave, and also filtering out options that are processed only
2338  * locally.
2339  **/
2340 void server_options(char **args, int *argc_p)
2341 {
2342         static char argstr[64];
2343         int ac = *argc_p;
2344         uchar where;
2345         char *arg;
2346         int i, x;
2347
2348         /* This should always remain first on the server's command-line. */
2349         args[ac++] = "--server";
2350
2351         if (daemon_over_rsh > 0) {
2352                 args[ac++] = "--daemon";
2353                 *argc_p = ac;
2354                 /* if we're passing --daemon, we're done */
2355                 return;
2356         }
2357
2358         if (!am_sender)
2359                 args[ac++] = "--sender";
2360
2361         x = 1;
2362         argstr[0] = '-';
2363
2364         if (protect_args)
2365                 argstr[x++] = 's';
2366
2367         for (i = 0; i < verbose; i++)
2368                 argstr[x++] = 'v';
2369
2370         /* the -q option is intentionally left out */
2371         if (make_backups)
2372                 argstr[x++] = 'b';
2373         if (update_only)
2374                 argstr[x++] = 'u';
2375         if (!do_xfers) /* Note: NOT "dry_run"! */
2376                 argstr[x++] = 'n';
2377         if (preserve_links)
2378                 argstr[x++] = 'l';
2379         if ((xfer_dirs >= 2 && xfer_dirs < 4)
2380          || (xfer_dirs && !recurse && (list_only || (delete_mode && am_sender))))
2381                 argstr[x++] = 'd';
2382         if (am_sender) {
2383                 if (keep_dirlinks)
2384                         argstr[x++] = 'K';
2385                 if (prune_empty_dirs)
2386                         argstr[x++] = 'm';
2387                 if (omit_dir_times)
2388                         argstr[x++] = 'O';
2389                 if (omit_link_times)
2390                         argstr[x++] = 'J';
2391                 if (fuzzy_basis) {
2392                         argstr[x++] = 'y';
2393                         if (fuzzy_basis > 1)
2394                                 argstr[x++] = 'y';
2395                 }
2396         } else {
2397                 if (copy_links)
2398                         argstr[x++] = 'L';
2399                 if (copy_dirlinks)
2400                         argstr[x++] = 'k';
2401         }
2402
2403         if (whole_file > 0)
2404                 argstr[x++] = 'W';
2405         /* We don't need to send --no-whole-file, because it's the
2406          * default for remote transfers, and in any case old versions
2407          * of rsync will not understand it. */
2408
2409         if (preserve_hard_links) {
2410                 argstr[x++] = 'H';
2411                 if (preserve_hard_links > 1)
2412                         argstr[x++] = 'H';
2413         }
2414         if (preserve_uid)
2415                 argstr[x++] = 'o';
2416         if (preserve_gid)
2417                 argstr[x++] = 'g';
2418         if (preserve_devices) /* ignore preserve_specials here */
2419                 argstr[x++] = 'D';
2420         if (preserve_times)
2421                 argstr[x++] = 't';
2422         if (preserve_perms)
2423                 argstr[x++] = 'p';
2424         else if (preserve_executability && am_sender)
2425                 argstr[x++] = 'E';
2426 #ifdef SUPPORT_ACLS
2427         if (preserve_acls)
2428                 argstr[x++] = 'A';
2429 #endif
2430 #ifdef SUPPORT_XATTRS
2431         if (preserve_xattrs) {
2432                 argstr[x++] = 'X';
2433                 if (preserve_xattrs > 1)
2434                         argstr[x++] = 'X';
2435         }
2436 #endif
2437         if (recurse)
2438                 argstr[x++] = 'r';
2439         if (always_checksum)
2440                 argstr[x++] = 'c';
2441         if (cvs_exclude)
2442                 argstr[x++] = 'C';
2443         if (ignore_times)
2444                 argstr[x++] = 'I';
2445         if (relative_paths)
2446                 argstr[x++] = 'R';
2447         if (one_file_system) {
2448                 argstr[x++] = 'x';
2449                 if (one_file_system > 1)
2450                         argstr[x++] = 'x';
2451         }
2452         if (sparse_files)
2453                 argstr[x++] = 'S';
2454         if (do_compression)
2455                 argstr[x++] = 'z';
2456
2457         set_allow_inc_recurse();
2458
2459         /* We don't really know the actual protocol_version at this point,
2460          * but checking the pre-negotiated value allows the user to use a
2461          * --protocol=29 override to avoid the use of this -eFLAGS opt. */
2462         if (protocol_version >= 30) {
2463                 /* We make use of the -e option to let the server know about
2464                  * any pre-release protocol version && some behavior flags. */
2465                 argstr[x++] = 'e';
2466 #if SUBPROTOCOL_VERSION != 0
2467                 if (protocol_version == PROTOCOL_VERSION) {
2468                         x += snprintf(argstr+x, sizeof argstr - x,
2469                                       "%d.%d",
2470                                       PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
2471                 } else
2472 #endif
2473                         argstr[x++] = '.';
2474                 if (allow_inc_recurse)
2475                         argstr[x++] = 'i';
2476 #ifdef CAN_SET_SYMLINK_TIMES
2477                 argstr[x++] = 'L';
2478 #endif
2479 #ifdef ICONV_OPTION
2480                 argstr[x++] = 's';
2481 #endif
2482                 argstr[x++] = 'f';
2483         }
2484
2485         if (x >= (int)sizeof argstr) { /* Not possible... */
2486                 rprintf(FERROR, "argstr overflow in server_options().\n");
2487                 exit_cleanup(RERR_MALLOC);
2488         }
2489
2490         argstr[x] = '\0';
2491
2492         if (x > 1)
2493                 args[ac++] = argstr;
2494
2495 #ifdef ICONV_OPTION
2496         if (iconv_opt) {
2497                 char *set = strchr(iconv_opt, ',');
2498                 if (set)
2499                         set++;
2500                 else
2501                         set = iconv_opt;
2502                 if (asprintf(&arg, "--iconv=%s", set) < 0)
2503                         goto oom;
2504                 args[ac++] = arg;
2505         }
2506 #endif
2507
2508         if (protect_args && !local_server) /* unprotected args stop here */
2509                 args[ac++] = NULL;
2510
2511         if (list_only > 1)
2512                 args[ac++] = "--list-only";
2513
2514         /* This makes sure that the remote rsync can handle deleting with -d
2515          * sans -r because the --no-r option was added at the same time. */
2516         if (xfer_dirs && !recurse && delete_mode && am_sender)
2517                 args[ac++] = "--no-r";
2518
2519         if (do_compression && def_compress_level != Z_DEFAULT_COMPRESSION) {
2520                 if (asprintf(&arg, "--compress-level=%d", def_compress_level) < 0)
2521                         goto oom;
2522                 args[ac++] = arg;
2523         }
2524
2525         if (preserve_devices) {
2526                 /* Note: sending "--devices" would not be backward-compatible. */
2527                 if (!preserve_specials)
2528                         args[ac++] = "--no-specials"; /* -D is already set. */
2529         } else if (preserve_specials)
2530                 args[ac++] = "--specials";
2531
2532         /* The server side doesn't use our log-format, but in certain
2533          * circumstances they need to know a little about the option. */
2534         if (stdout_format && am_sender) {
2535                 /* Use --log-format, not --out-format, for compatibility. */
2536                 if (stdout_format_has_i > 1)
2537                         args[ac++] = "--log-format=%i%I";
2538                 else if (stdout_format_has_i)
2539                         args[ac++] = "--log-format=%i";
2540                 else if (stdout_format_has_o_or_i)
2541                         args[ac++] = "--log-format=%o";
2542                 else if (!verbose)
2543                         args[ac++] = "--log-format=X";
2544         }
2545
2546         if (block_size) {
2547                 if (asprintf(&arg, "-B%lu", block_size) < 0)
2548                         goto oom;
2549                 args[ac++] = arg;
2550         }
2551
2552         if (io_timeout) {
2553                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
2554                         goto oom;
2555                 args[ac++] = arg;
2556         }
2557
2558         if (bwlimit) {
2559                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
2560                         goto oom;
2561                 args[ac++] = arg;
2562         }
2563
2564         if (backup_dir) {
2565                 args[ac++] = "--backup-dir";
2566                 args[ac++] = backup_dir;
2567         }
2568
2569         /* Only send --suffix if it specifies a non-default value. */
2570         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
2571                 /* We use the following syntax to avoid weirdness with '~'. */
2572                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
2573                         goto oom;
2574                 args[ac++] = arg;
2575         }
2576
2577         if (am_sender) {
2578                 if (max_delete > 0) {
2579                         if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
2580                                 goto oom;
2581                         args[ac++] = arg;
2582                 } else if (max_delete == 0)
2583                         args[ac++] = "--max-delete=-1";
2584                 if (min_size >= 0) {
2585                         args[ac++] = "--min-size";
2586                         args[ac++] = min_size_arg;
2587                 }
2588                 if (max_size >= 0) {
2589                         args[ac++] = "--max-size";
2590                         args[ac++] = max_size_arg;
2591                 }
2592                 if (delete_before)
2593                         args[ac++] = "--delete-before";
2594                 else if (delete_during == 2)
2595                         args[ac++] = "--delete-delay";
2596                 else if (delete_during)
2597                         args[ac++] = "--delete-during";
2598                 else if (delete_after)
2599                         args[ac++] = "--delete-after";
2600                 else if (delete_mode && !delete_excluded)
2601                         args[ac++] = "--delete";
2602                 if (delete_excluded)
2603                         args[ac++] = "--delete-excluded";
2604                 if (force_delete)
2605                         args[ac++] = "--force";
2606                 if (write_batch < 0)
2607                         args[ac++] = "--only-write-batch=X";
2608                 if (am_root > 1)
2609                         args[ac++] = "--super";
2610                 if (size_only)
2611                         args[ac++] = "--size-only";
2612                 if (do_stats)
2613                         args[ac++] = "--stats";
2614         } else {
2615                 if (skip_compress) {
2616                         if (asprintf(&arg, "--skip-compress=%s", skip_compress) < 0)
2617                                 goto oom;
2618                         args[ac++] = arg;
2619                 }
2620         }
2621
2622         /* --delete-missing-args needs the cooperation of both sides, but
2623          * the sender can handle --ignore-missing-args by itself. */
2624         if (missing_args == 2)
2625                 args[ac++] = "--delete-missing-args";
2626         else if (missing_args == 1 && !am_sender)
2627                 args[ac++] = "--ignore-missing-args";
2628
2629         if (modify_window_set) {
2630                 if (asprintf(&arg, "--modify-window=%d", modify_window) < 0)
2631                         goto oom;
2632                 args[ac++] = arg;
2633         }
2634
2635         if (checksum_seed) {
2636                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
2637                         goto oom;
2638                 args[ac++] = arg;
2639         }
2640
2641         if (partial_dir && am_sender) {
2642                 if (partial_dir != tmp_partialdir) {
2643                         args[ac++] = "--partial-dir";
2644                         args[ac++] = partial_dir;
2645                 }
2646                 if (delay_updates)
2647                         args[ac++] = "--delay-updates";
2648         } else if (keep_partial && am_sender)
2649                 args[ac++] = "--partial";
2650
2651         if (ignore_errors)
2652                 args[ac++] = "--ignore-errors";
2653
2654         if (copy_unsafe_links)
2655                 args[ac++] = "--copy-unsafe-links";
2656
2657         if (safe_symlinks)
2658                 args[ac++] = "--safe-links";
2659
2660         if (numeric_ids)
2661                 args[ac++] = "--numeric-ids";
2662
2663         if (use_qsort)
2664                 args[ac++] = "--use-qsort";
2665
2666         if (am_sender) {
2667                 if (usermap) {
2668                         if (asprintf(&arg, "--usermap=%s", usermap) < 0)
2669                                 goto oom;
2670                         args[ac++] = arg;
2671                 }
2672
2673                 if (groupmap) {
2674                         if (asprintf(&arg, "--groupmap=%s", groupmap) < 0)
2675                                 goto oom;
2676                         args[ac++] = arg;
2677                 }
2678
2679                 if (ignore_existing)
2680                         args[ac++] = "--ignore-existing";
2681
2682                 /* Backward compatibility: send --existing, not --ignore-non-existing. */
2683                 if (ignore_non_existing)
2684                         args[ac++] = "--existing";
2685
2686                 if (tmpdir) {
2687                         args[ac++] = "--temp-dir";
2688                         args[ac++] = tmpdir;
2689                 }
2690
2691                 if (basis_dir[0]) {
2692                         /* the server only needs this option if it is not the sender,
2693                          *   and it may be an older version that doesn't know this
2694                          *   option, so don't send it if client is the sender.
2695                          */
2696                         for (i = 0; i < basis_dir_cnt; i++) {
2697                                 args[ac++] = dest_option;
2698                                 args[ac++] = basis_dir[i];
2699                         }
2700                 }
2701         }
2702
2703         /* What flags do we need to send to the other side? */
2704         where = (am_server ? W_CLI : W_SRV) | (am_sender ? W_REC : W_SND);
2705         arg = make_output_option(info_words, info_levels, where);
2706         if (arg)
2707                 args[ac++] = arg;
2708
2709         arg = make_output_option(debug_words, debug_levels, where);
2710         if (arg)
2711                 args[ac++] = arg;
2712
2713         if (append_mode) {
2714                 if (append_mode > 1)
2715                         args[ac++] = "--append";
2716                 args[ac++] = "--append";
2717         } else if (inplace)
2718                 args[ac++] = "--inplace";
2719
2720         if (files_from && (!am_sender || filesfrom_host)) {
2721                 if (filesfrom_host) {
2722                         args[ac++] = "--files-from";
2723                         args[ac++] = files_from;
2724                         if (eol_nulls)
2725                                 args[ac++] = "--from0";
2726                 } else {
2727                         args[ac++] = "--files-from=-";
2728                         args[ac++] = "--from0";
2729                 }
2730                 if (!relative_paths)
2731                         args[ac++] = "--no-relative";
2732         }
2733         /* It's OK that this checks the upper-bound of the protocol_version. */
2734         if (relative_paths && !implied_dirs && (!am_sender || protocol_version >= 30))
2735                 args[ac++] = "--no-implied-dirs";
2736
2737         if (remove_source_files == 1)
2738                 args[ac++] = "--remove-source-files";
2739         else if (remove_source_files)
2740                 args[ac++] = "--remove-sent-files";
2741
2742         if (preallocate_files && am_sender)
2743                 args[ac++] = "--preallocate";
2744
2745         if (ac > MAX_SERVER_ARGS) { /* Not possible... */
2746                 rprintf(FERROR, "argc overflow in server_options().\n");
2747                 exit_cleanup(RERR_MALLOC);
2748         }
2749
2750         if (remote_option_cnt) {
2751                 int j;
2752                 if (ac + remote_option_cnt > MAX_SERVER_ARGS) {
2753                         rprintf(FERROR, "too many remote options specified.\n");
2754                         exit_cleanup(RERR_SYNTAX);
2755                 }
2756                 for (j = 1; j <= remote_option_cnt; j++)
2757                         args[ac++] = (char*)remote_options[j];
2758         }
2759
2760         *argc_p = ac;
2761         return;
2762
2763     oom:
2764         out_of_memory("server_options");
2765 }
2766
2767 /* If str points to a valid hostspec, return allocated memory containing the
2768  * [USER@]HOST part of the string, and set the path_start_ptr to the part of
2769  * the string after the host part.  Otherwise, return NULL.  If port_ptr is
2770  * non-NULL, we must be parsing an rsync:// URL hostname, and we will set
2771  * *port_ptr if a port number is found.  Note that IPv6 IPs will have their
2772  * (required for parsing) [ and ] chars elided from the returned string. */
2773 static char *parse_hostspec(char *str, char **path_start_ptr, int *port_ptr)
2774 {
2775         char *s, *host_start = str;
2776         int hostlen = 0, userlen = 0;
2777         char *ret;
2778
2779         for (s = str; ; s++) {
2780                 if (!*s) {
2781                         /* It is only OK if we run out of string with rsync:// */
2782                         if (!port_ptr)
2783                                 return NULL;
2784                         if (!hostlen)
2785                                 hostlen = s - host_start;
2786                         break;
2787                 }
2788                 if (*s == ':' || *s == '/') {
2789                         if (!hostlen)
2790                                 hostlen = s - host_start;
2791                         if (*s++ == '/') {
2792                                 if (!port_ptr)
2793                                         return NULL;
2794                         } else if (port_ptr) {
2795                                 *port_ptr = atoi(s);
2796                                 while (isDigit(s)) s++;
2797                                 if (*s && *s++ != '/')
2798                                         return NULL;
2799                         }
2800                         break;
2801                 }
2802                 if (*s == '@') {
2803                         userlen = s - str + 1;
2804                         host_start = s + 1;
2805                 } else if (*s == '[') {
2806                         if (s != host_start++)
2807                                 return NULL;
2808                         while (*s && *s != ']' && *s != '/') s++; /*SHARED ITERATOR*/
2809                         hostlen = s - host_start;
2810                         if (*s != ']' || (s[1] && s[1] != '/' && s[1] != ':') || !hostlen)
2811                                 return NULL;
2812                 }
2813         }
2814
2815         *path_start_ptr = s;
2816         ret = new_array(char, userlen + hostlen + 1);
2817         if (userlen)
2818                 strlcpy(ret, str, userlen + 1);
2819         strlcpy(ret + userlen, host_start, hostlen + 1);
2820         return ret;
2821 }
2822
2823 /* Look for a HOST specfication of the form "HOST:PATH", "HOST::PATH", or
2824  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
2825  * memory with the HOST.  If a daemon-accessing spec was specified, the value
2826  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
2827  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
2828  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
2829  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
2830 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
2831 {
2832         char *path;
2833
2834         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
2835                 *host_ptr = parse_hostspec(s + strlen(URL_PREFIX), &path, port_ptr);
2836                 if (*host_ptr) {
2837                         if (!*port_ptr)
2838                                 *port_ptr = RSYNC_PORT;
2839                         return path;
2840                 }
2841         }
2842
2843         *host_ptr = parse_hostspec(s, &path, NULL);
2844         if (!*host_ptr)
2845                 return NULL;
2846
2847         if (*path == ':') {
2848                 if (port_ptr && !*port_ptr)
2849                         *port_ptr = RSYNC_PORT;
2850                 return path + 1;
2851         }
2852         if (port_ptr)
2853                 *port_ptr = 0;
2854
2855         return path;
2856 }