Use RSYNC_GITVER in more output
[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) 2002-2020 Wayne Davison
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 3 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License along
19  * with this program; if not, visit the http://fsf.org website.
20  */
21
22 #include "rsync.h"
23 #include "itypes.h"
24 #include "ifuncs.h"
25 #include "latest-year.h"
26 #include "git-version.h"
27 #include <popt.h>
28
29 extern int module_id;
30 extern int local_server;
31 extern int sanitize_paths;
32 extern unsigned int module_dirlen;
33 extern struct name_num_obj valid_checksums;
34 extern struct name_num_obj valid_compressions;
35 extern filter_rule_list filter_list;
36 extern filter_rule_list daemon_filter_list;
37
38 int make_backups = 0;
39
40 /**
41  * If 1, send the whole file as literal data rather than trying to
42  * create an incremental diff.
43  *
44  * If -1, then look at whether we're local or remote and go by that.
45  *
46  * @sa disable_deltas_p()
47  **/
48 int whole_file = -1;
49
50 int append_mode = 0;
51 int keep_dirlinks = 0;
52 int copy_dirlinks = 0;
53 int copy_links = 0;
54 int write_devices = 0;
55 int preserve_links = 0;
56 int preserve_hard_links = 0;
57 int preserve_acls = 0;
58 int preserve_xattrs = 0;
59 int preserve_perms = 0;
60 int preserve_executability = 0;
61 int preserve_devices = 0;
62 int preserve_specials = 0;
63 int preserve_uid = 0;
64 int preserve_gid = 0;
65 int preserve_times = 0;
66 int preserve_atimes = 0;
67 int preserve_crtimes = 0;
68 int update_only = 0;
69 int open_noatime = 0;
70 int cvs_exclude = 0;
71 int dry_run = 0;
72 int do_xfers = 1;
73 int ignore_times = 0;
74 int delete_mode = 0;
75 int delete_during = 0;
76 int delete_before = 0;
77 int delete_after = 0;
78 int delete_excluded = 0;
79 int remove_source_files = 0;
80 int one_file_system = 0;
81 int protocol_version = PROTOCOL_VERSION;
82 int sparse_files = 0;
83 int preallocate_files = 0;
84 int do_compression = 0;
85 int do_compression_level = CLVL_NOT_SPECIFIED;
86 int am_root = 0; /* 0 = normal, 1 = root, 2 = --super, -1 = --fake-super */
87 int am_server = 0;
88 int am_sender = 0;
89 int am_starting_up = 1;
90 int relative_paths = -1;
91 int implied_dirs = 1;
92 int missing_args = 0; /* 0 = FERROR_XFER, 1 = ignore, 2 = delete */
93 int numeric_ids = 0;
94 int msgs2stderr = 2; /* Default: send errors to stderr for local & remote-shell transfers */
95 int allow_8bit_chars = 0;
96 int force_delete = 0;
97 int io_timeout = 0;
98 int prune_empty_dirs = 0;
99 int use_qsort = 0;
100 char *files_from = NULL;
101 int filesfrom_fd = -1;
102 char *filesfrom_host = NULL;
103 int eol_nulls = 0;
104 int protect_args = -1;
105 int human_readable = 1;
106 int recurse = 0;
107 int mkpath_dest_arg = 0;
108 int allow_inc_recurse = 1;
109 int xfer_dirs = -1;
110 int am_daemon = 0;
111 int connect_timeout = 0;
112 int keep_partial = 0;
113 int safe_symlinks = 0;
114 int copy_unsafe_links = 0;
115 int munge_symlinks = 0;
116 int size_only = 0;
117 int daemon_bwlimit = 0;
118 int bwlimit = 0;
119 int fuzzy_basis = 0;
120 size_t bwlimit_writemax = 0;
121 int ignore_existing = 0;
122 int ignore_non_existing = 0;
123 int need_messages_from_generator = 0;
124 int max_delete = INT_MIN;
125 OFF_T max_size = -1;
126 OFF_T min_size = -1;
127 int ignore_errors = 0;
128 int modify_window = 0;
129 int blocking_io = -1;
130 int checksum_seed = 0;
131 int inplace = 0;
132 int delay_updates = 0;
133 int32 block_size = 0;
134 time_t stop_at_utime = 0;
135 char *skip_compress = NULL;
136 char *copy_as = NULL;
137 item_list dparam_list = EMPTY_ITEM_LIST;
138
139 /** Network address family. **/
140 int default_af_hint
141 #ifdef INET6
142         = 0;            /* Any protocol */
143 #else
144         = AF_INET;      /* Must use IPv4 */
145 # ifdef AF_INET6
146 #  undef AF_INET6
147 # endif
148 # define AF_INET6 AF_INET /* make -6 option a no-op */
149 #endif
150
151 /** Do not go into the background when run as --daemon.  Good
152  * for debugging and required for running as a service on W32,
153  * or under Unix process-monitors. **/
154 int no_detach
155 #if defined _WIN32 || defined __WIN32__
156         = 1;
157 #else
158         = 0;
159 #endif
160
161 int write_batch = 0;
162 int read_batch = 0;
163 int backup_dir_len = 0;
164 int backup_suffix_len;
165 unsigned int backup_dir_remainder;
166
167 char *backup_suffix = NULL;
168 char *tmpdir = NULL;
169 char *partial_dir = NULL;
170 char *basis_dir[MAX_BASIS_DIRS+1];
171 char *config_file = NULL;
172 char *shell_cmd = NULL;
173 char *logfile_name = NULL;
174 char *logfile_format = NULL;
175 char *stdout_format = NULL;
176 char *password_file = NULL;
177 char *early_input_file = NULL;
178 char *rsync_path = RSYNC_PATH;
179 char *backup_dir = NULL;
180 char backup_dir_buf[MAXPATHLEN];
181 char *sockopts = NULL;
182 char *usermap = NULL;
183 char *groupmap = NULL;
184 int rsync_port = 0;
185 int alt_dest_type = 0;
186 int basis_dir_cnt = 0;
187
188 #define DEFAULT_MAX_ALLOC (1024L * 1024 * 1024)
189 size_t max_alloc = DEFAULT_MAX_ALLOC;
190 char *max_alloc_arg;
191
192 static int version_opt_cnt = 0;
193 static int remote_option_alloc = 0;
194 int remote_option_cnt = 0;
195 const char **remote_options = NULL;
196 const char *checksum_choice = NULL;
197 const char *compress_choice = NULL;
198
199 #ifndef __APPLE__ /* Do we need a configure check for this? */
200 #define SUPPORT_ATIMES 1
201 #endif
202
203 int quiet = 0;
204 int output_motd = 1;
205 int log_before_transfer = 0;
206 int stdout_format_has_i = 0;
207 int stdout_format_has_o_or_i = 0;
208 int logfile_format_has_i = 0;
209 int logfile_format_has_o_or_i = 0;
210 int always_checksum = 0;
211 int list_only = 0;
212
213 #define MAX_BATCH_NAME_LEN 256  /* Must be less than MAXPATHLEN-13 */
214 char *batch_name = NULL;
215
216 int need_unsorted_flist = 0;
217 char *iconv_opt =
218 #ifdef ICONV_OPTION
219                 ICONV_OPTION;
220 #else
221                 NULL;
222 #endif
223
224 struct chmod_mode_struct *chmod_modes = NULL;
225
226 static const char *debug_verbosity[] = {
227         /*0*/ NULL,
228         /*1*/ NULL,
229         /*2*/ "BIND,CMD,CONNECT,DEL,DELTASUM,DUP,FILTER,FLIST,ICONV",
230         /*3*/ "ACL,BACKUP,CONNECT2,DELTASUM2,DEL2,EXIT,FILTER2,FLIST2,FUZZY,GENR,OWN,RECV,SEND,TIME",
231         /*4*/ "CMD2,DELTASUM3,DEL3,EXIT2,FLIST3,ICONV2,OWN2,PROTO,TIME2",
232         /*5*/ "CHDIR,DELTASUM4,FLIST4,FUZZY2,HASH,HLINK",
233 };
234
235 #define MAX_VERBOSITY ((int)(sizeof debug_verbosity / sizeof debug_verbosity[0]) - 1)
236
237 static const char *info_verbosity[1+MAX_VERBOSITY] = {
238         /*0*/ NULL,
239         /*1*/ "COPY,DEL,FLIST,MISC,NAME,STATS,SYMSAFE",
240         /*2*/ "BACKUP,MISC2,MOUNT,NAME2,REMOVE,SKIP",
241 };
242
243 #define MAX_OUT_LEVEL 4 /* The largest N allowed for any flagN word. */
244
245 short info_levels[COUNT_INFO], debug_levels[COUNT_DEBUG];
246
247 #define DEFAULT_PRIORITY 0      /* Default/implied/--verbose set values. */
248 #define HELP_PRIORITY 1         /* The help output uses this level. */
249 #define USER_PRIORITY 2         /* User-specified via --info or --debug */
250 #define LIMIT_PRIORITY 3        /* Overriding priority when limiting values. */
251
252 #define W_CLI (1<<0)    /* client side */
253 #define W_SRV (1<<1)    /* server side */
254 #define W_SND (1<<2)    /* sending side */
255 #define W_REC (1<<3)    /* receiving side */
256
257 struct output_struct {
258         char *name;     /* The name of the info/debug flag. */
259         char *help;     /* The description of the info/debug flag. */
260         uchar namelen;  /* The length of the name string. */
261         uchar flag;     /* The flag's value, for consistency check. */
262         uchar where;    /* Bits indicating where the flag is used. */
263         uchar priority; /* See *_PRIORITY defines. */
264 };
265
266 #define INFO_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, INFO_##flag, where, 0 }
267
268 static struct output_struct info_words[COUNT_INFO+1] = {
269         INFO_WORD(BACKUP, W_REC, "Mention files backed up"),
270         INFO_WORD(COPY, W_REC, "Mention files copied locally on the receiving side"),
271         INFO_WORD(DEL, W_REC, "Mention deletions on the receiving side"),
272         INFO_WORD(FLIST, W_CLI, "Mention file-list receiving/sending (levels 1-2)"),
273         INFO_WORD(MISC, W_SND|W_REC, "Mention miscellaneous information (levels 1-2)"),
274         INFO_WORD(MOUNT, W_SND|W_REC, "Mention mounts that were found or skipped"),
275         INFO_WORD(NAME, W_SND|W_REC, "Mention 1) updated file/dir names, 2) unchanged names"),
276         INFO_WORD(PROGRESS, W_CLI, "Mention 1) per-file progress or 2) total transfer progress"),
277         INFO_WORD(REMOVE, W_SND, "Mention files removed on the sending side"),
278         INFO_WORD(SKIP, W_REC, "Mention files that are skipped due to options used"),
279         INFO_WORD(STATS, W_CLI|W_SRV, "Mention statistics at end of run (levels 1-3)"),
280         INFO_WORD(SYMSAFE, W_SND|W_REC, "Mention symlinks that are unsafe"),
281         { NULL, "--info", 0, 0, 0, 0 }
282 };
283
284 #define DEBUG_WORD(flag, where, help) { #flag, help, sizeof #flag - 1, DEBUG_##flag, where, 0 }
285
286 static struct output_struct debug_words[COUNT_DEBUG+1] = {
287         DEBUG_WORD(ACL, W_SND|W_REC, "Debug extra ACL info"),
288         DEBUG_WORD(BACKUP, W_REC, "Debug backup actions (levels 1-2)"),
289         DEBUG_WORD(BIND, W_CLI, "Debug socket bind actions"),
290         DEBUG_WORD(CHDIR, W_CLI|W_SRV, "Debug when the current directory changes"),
291         DEBUG_WORD(CONNECT, W_CLI, "Debug connection events (levels 1-2)"),
292         DEBUG_WORD(CMD, W_CLI, "Debug commands+options that are issued (levels 1-2)"),
293         DEBUG_WORD(DEL, W_REC, "Debug delete actions (levels 1-3)"),
294         DEBUG_WORD(DELTASUM, W_SND|W_REC, "Debug delta-transfer checksumming (levels 1-4)"),
295         DEBUG_WORD(DUP, W_REC, "Debug weeding of duplicate names"),
296         DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-3)"),
297         DEBUG_WORD(FILTER, W_SND|W_REC, "Debug filter actions (levels 1-2)"),
298         DEBUG_WORD(FLIST, W_SND|W_REC, "Debug file-list operations (levels 1-4)"),
299         DEBUG_WORD(FUZZY, W_REC, "Debug fuzzy scoring (levels 1-2)"),
300         DEBUG_WORD(GENR, W_REC, "Debug generator functions"),
301         DEBUG_WORD(HASH, W_SND|W_REC, "Debug hashtable code"),
302         DEBUG_WORD(HLINK, W_SND|W_REC, "Debug hard-link actions (levels 1-3)"),
303         DEBUG_WORD(ICONV, W_CLI|W_SRV, "Debug iconv character conversions (levels 1-2)"),
304         DEBUG_WORD(IO, W_CLI|W_SRV, "Debug I/O routines (levels 1-4)"),
305         DEBUG_WORD(NSTR, W_CLI|W_SRV, "Debug negotiation strings"),
306         DEBUG_WORD(OWN, W_REC, "Debug ownership changes in users & groups (levels 1-2)"),
307         DEBUG_WORD(PROTO, W_CLI|W_SRV, "Debug protocol information"),
308         DEBUG_WORD(RECV, W_REC, "Debug receiver functions"),
309         DEBUG_WORD(SEND, W_SND, "Debug sender functions"),
310         DEBUG_WORD(TIME, W_REC, "Debug setting of modified times (levels 1-2)"),
311         { NULL, "--debug", 0, 0, 0, 0 }
312 };
313
314 static int verbose = 0;
315 static int do_stats = 0;
316 static int do_progress = 0;
317 static int daemon_opt;   /* sets am_daemon after option error-reporting */
318 static int omit_dir_times = 0;
319 static int omit_link_times = 0;
320 static int F_option_cnt = 0;
321 static int modify_window_set;
322 static int itemize_changes = 0;
323 static int refused_delete, refused_archive_part, refused_compress;
324 static int refused_partial, refused_progress, refused_delete_before;
325 static int refused_delete_during;
326 static int refused_inplace, refused_no_iconv;
327 static BOOL usermap_via_chown, groupmap_via_chown;
328 static char *outbuf_mode;
329 static char *bwlimit_arg, *max_size_arg, *min_size_arg;
330 static char tmp_partialdir[] = ".~tmp~";
331
332 /** Local address to bind.  As a character string because it's
333  * interpreted by the IPv6 layer: should be a numeric IP4 or IP6
334  * address, or a hostname. **/
335 char *bind_address;
336
337 static void output_item_help(struct output_struct *words);
338
339 /* This constructs a string that represents all the options set for either
340  * the --info or --debug setting, skipping any implied options (by -v, etc.).
341  * This is used both when conveying the user's options to the server, and
342  * when the help output wants to tell the user what options are implied. */
343 static char *make_output_option(struct output_struct *words, short *levels, uchar where)
344 {
345         char *str = words == info_words ? "--info=" : "--debug=";
346         int j, counts[MAX_OUT_LEVEL+1], pos, skipped = 0, len = 0, max = 0, lev = 0;
347         int word_count = words == info_words ? COUNT_INFO : COUNT_DEBUG;
348         char *buf;
349
350         memset(counts, 0, sizeof counts);
351
352         for (j = 0; words[j].name; j++) {
353                 if (words[j].flag != j) {
354                         rprintf(FERROR, "rsync: internal error on %s%s: %d != %d\n",
355                                 words == info_words ? "INFO_" : "DEBUG_",
356                                 words[j].name, words[j].flag, j);
357                         exit_cleanup(RERR_UNSUPPORTED);
358                 }
359                 if (!(words[j].where & where))
360                         continue;
361                 if (words[j].priority == DEFAULT_PRIORITY) {
362                         /* Implied items don't need to be mentioned. */
363                         skipped++;
364                         continue;
365                 }
366                 len += len ? 1 : strlen(str);
367                 len += strlen(words[j].name);
368                 len += levels[j] == 1 ? 0 : 1;
369
370                 if (words[j].priority == HELP_PRIORITY)
371                         continue; /* no abbreviating for help */
372
373                 assert(levels[j] <= MAX_OUT_LEVEL);
374                 if (++counts[levels[j]] > max) {
375                         /* Determine which level has the most items. */
376                         lev = levels[j];
377                         max = counts[lev];
378                 }
379         }
380
381         /* Sanity check the COUNT_* define against the length of the table. */
382         if (j != word_count) {
383                 rprintf(FERROR, "rsync: internal error: %s is wrong! (%d != %d)\n",
384                         words == info_words ? "COUNT_INFO" : "COUNT_DEBUG",
385                         j, word_count);
386                 exit_cleanup(RERR_UNSUPPORTED);
387         }
388
389         if (!len)
390                 return NULL;
391
392         len++;
393         buf = new_array(char, len);
394         pos = 0;
395
396         if (skipped || max < 5)
397                 lev = -1;
398         else {
399                 if (lev == 0)
400                         pos += snprintf(buf, len, "%sNONE", str);
401                 else if (lev == 1)
402                         pos += snprintf(buf, len, "%sALL", str);
403                 else
404                         pos += snprintf(buf, len, "%sALL%d", str, lev);
405         }
406
407         for (j = 0; words[j].name && pos < len; j++) {
408                 if (words[j].priority == DEFAULT_PRIORITY || levels[j] == lev || !(words[j].where & where))
409                         continue;
410                 if (pos)
411                         buf[pos++] = ',';
412                 else
413                         pos += strlcpy(buf+pos, str, len-pos);
414                 if (pos < len)
415                         pos += strlcpy(buf+pos, words[j].name, len-pos);
416                 /* Level 1 is implied by the name alone. */
417                 if (levels[j] != 1 && pos < len)
418                         buf[pos++] = '0' + levels[j];
419         }
420
421         buf[pos] = '\0';
422
423         return buf;
424 }
425
426 static void parse_output_words(struct output_struct *words, short *levels, const char *str, uchar priority)
427 {
428         const char *s;
429         int j, len, lev;
430
431         for ( ; str; str = s) {
432                 if ((s = strchr(str, ',')) != NULL)
433                         len = s++ - str;
434                 else
435                         len = strlen(str);
436                 if (!len)
437                         continue;
438                 if (!isDigit(str)) {
439                         while (len && isDigit(str+len-1))
440                                 len--;
441                 }
442                 lev = isDigit(str+len) ? atoi(str+len) : 1;
443                 if (lev > MAX_OUT_LEVEL)
444                         lev = MAX_OUT_LEVEL;
445                 if (len == 4 && strncasecmp(str, "help", 4) == 0) {
446                         output_item_help(words);
447                         exit_cleanup(0);
448                 }
449                 if (len == 4 && strncasecmp(str, "none", 4) == 0)
450                         len = lev = 0;
451                 else if (len == 3 && strncasecmp(str, "all", 3) == 0)
452                         len = 0;
453                 for (j = 0; words[j].name; j++) {
454                         if (!len
455                          || (len == words[j].namelen && strncasecmp(str, words[j].name, len) == 0)) {
456                                 if (priority >= words[j].priority) {
457                                         words[j].priority = priority;
458                                         levels[j] = lev;
459                                 }
460                                 if (len)
461                                         break;
462                         }
463                 }
464                 if (len && !words[j].name && !am_server) {
465                         rprintf(FERROR, "Unknown %s item: \"%.*s\"\n",
466                                 words[j].help, len, str);
467                         exit_cleanup(RERR_SYNTAX);
468                 }
469         }
470 }
471
472 /* Tell the user what all the info or debug flags mean. */
473 static void output_item_help(struct output_struct *words)
474 {
475         short *levels = words == info_words ? info_levels : debug_levels;
476         const char **verbosity = words == info_words ? info_verbosity : debug_verbosity;
477         char buf[128], *opt, *fmt = "%-10s %s\n";
478         int j;
479
480         reset_output_levels();
481
482         rprintf(FINFO, "Use OPT or OPT1 for level 1 output, OPT2 for level 2, etc.; OPT0 silences.\n");
483         rprintf(FINFO, "\n");
484         for (j = 0; words[j].name; j++)
485                 rprintf(FINFO, fmt, words[j].name, words[j].help);
486         rprintf(FINFO, "\n");
487
488         snprintf(buf, sizeof buf, "Set all %s options (e.g. all%d)",
489                  words[j].help, MAX_OUT_LEVEL);
490         rprintf(FINFO, fmt, "ALL", buf);
491
492         snprintf(buf, sizeof buf, "Silence all %s options (same as all0)",
493                  words[j].help);
494         rprintf(FINFO, fmt, "NONE", buf);
495
496         rprintf(FINFO, fmt, "HELP", "Output this help message");
497         rprintf(FINFO, "\n");
498         rprintf(FINFO, "Options added for each increase in verbose level:\n");
499
500         for (j = 1; j <= MAX_VERBOSITY; j++) {
501                 parse_output_words(words, levels, verbosity[j], HELP_PRIORITY);
502                 opt = make_output_option(words, levels, W_CLI|W_SRV|W_SND|W_REC);
503                 if (opt) {
504                         rprintf(FINFO, "%d) %s\n", j, strchr(opt, '=')+1);
505                         free(opt);
506                 }
507                 reset_output_levels();
508         }
509 }
510
511 /* The --verbose option now sets info+debug flags. */
512 static void set_output_verbosity(int level, uchar priority)
513 {
514         int j;
515
516         if (level > MAX_VERBOSITY)
517                 level = MAX_VERBOSITY;
518
519         for (j = 1; j <= level; j++) {
520                 parse_output_words(info_words, info_levels, info_verbosity[j], priority);
521                 parse_output_words(debug_words, debug_levels, debug_verbosity[j], priority);
522         }
523 }
524
525 /* Limit the info+debug flag levels given a verbose-option level limit. */
526 void limit_output_verbosity(int level)
527 {
528         short info_limits[COUNT_INFO], debug_limits[COUNT_DEBUG];
529         int j;
530
531         if (level > MAX_VERBOSITY)
532                 return;
533
534         memset(info_limits, 0, sizeof info_limits);
535         memset(debug_limits, 0, sizeof debug_limits);
536
537         /* Compute the level limits in the above arrays. */
538         for (j = 1; j <= level; j++) {
539                 parse_output_words(info_words, info_limits, info_verbosity[j], LIMIT_PRIORITY);
540                 parse_output_words(debug_words, debug_limits, debug_verbosity[j], LIMIT_PRIORITY);
541         }
542
543         for (j = 0; j < COUNT_INFO; j++) {
544                 if (info_levels[j] > info_limits[j])
545                         info_levels[j] = info_limits[j];
546         }
547
548         for (j = 0; j < COUNT_DEBUG; j++) {
549                 if (debug_levels[j] > debug_limits[j])
550                         debug_levels[j] = debug_limits[j];
551         }
552 }
553
554 void reset_output_levels(void)
555 {
556         int j;
557
558         memset(info_levels, 0, sizeof info_levels);
559         memset(debug_levels, 0, sizeof debug_levels);
560
561         for (j = 0; j < COUNT_INFO; j++)
562                 info_words[j].priority = DEFAULT_PRIORITY;
563
564         for (j = 0; j < COUNT_DEBUG; j++)
565                 debug_words[j].priority = DEFAULT_PRIORITY;
566 }
567
568 void negate_output_levels(void)
569 {
570         int j;
571
572         for (j = 0; j < COUNT_INFO; j++)
573                 info_levels[j] *= -1;
574
575         for (j = 0; j < COUNT_DEBUG; j++)
576                 debug_levels[j] *= -1;
577 }
578
579 static char *istring(const char *fmt, int val)
580 {
581         char *str;
582         if (asprintf(&str, fmt, val) < 0)
583                 out_of_memory("istring");
584         return str;
585 }
586
587 static void print_info_flags(enum logcode f)
588 {
589         STRUCT_STAT *dumstat;
590         char line_buf[75];
591         int line_len, j;
592         char *info_flags[] = {
593
594         "*Capabilities",
595
596                 istring("%d-bit files", (int)(sizeof (OFF_T) * 8)),
597                 istring("%d-bit inums", (int)(sizeof dumstat->st_ino * 8)), /* Don't check ino_t! */
598                 istring("%d-bit timestamps", (int)(sizeof (time_t) * 8)),
599                 istring("%d-bit long ints", (int)(sizeof (int64) * 8)),
600
601 #ifndef HAVE_SOCKETPAIR
602                 "no "
603 #endif
604                         "socketpairs",
605
606 #ifndef SUPPORT_HARD_LINKS
607                 "no "
608 #endif
609                         "hardlinks",
610
611 #ifndef CAN_HARDLINK_SPECIAL
612                 "no "
613 #endif
614                         "hardlink-specials",
615
616 #ifndef SUPPORT_LINKS
617                 "no "
618 #endif
619                         "symlinks",
620
621 #ifndef INET6
622                 "no "
623 #endif
624                         "IPv6",
625
626 #ifndef SUPPORT_ATIMES
627                 "no "
628 #endif
629                         "atimes",
630
631                 "batchfiles",
632
633 #ifndef HAVE_FTRUNCATE
634                 "no "
635 #endif
636                         "inplace",
637
638 #ifndef HAVE_FTRUNCATE
639                 "no "
640 #endif
641                         "append",
642
643 #ifndef SUPPORT_ACLS
644                 "no "
645 #endif
646                         "ACLs",
647
648 #ifndef SUPPORT_XATTRS
649                 "no "
650 #endif
651                         "xattrs",
652
653 #ifdef RSYNC_USE_PROTECTED_ARGS
654                 "default "
655 #else
656                 "optional "
657 #endif
658                         "protect-args",
659
660 #ifndef ICONV_OPTION
661                 "no "
662 #endif
663                         "iconv",
664
665 #ifndef CAN_SET_SYMLINK_TIMES
666                 "no "
667 #endif
668                         "symtimes",
669
670 #ifndef SUPPORT_PREALLOCATION
671                 "no "
672 #endif
673                         "prealloc",
674
675 #ifndef HAVE_MKTIME
676                 "no "
677 #endif
678                         "stop-at",
679
680 #ifndef SUPPORT_CRTIMES
681                 "no "
682 #endif
683                         "crtimes",
684
685         "*Optimizations",
686
687 #ifndef HAVE_SIMD
688                 "no "
689 #endif
690                         "SIMD",
691
692 #ifndef HAVE_ASM
693                 "no "
694 #endif
695                         "asm",
696
697 #ifndef USE_OPENSSL
698                 "no "
699 #endif
700                         "openssl-crypto",
701
702                 NULL
703         };
704
705         for (line_len = 0, j = 0; ; j++) {
706                 char *str = info_flags[j], *next_nfo = str ? info_flags[j+1] : NULL;
707                 int str_len = str && *str != '*' ? strlen(str) : 1000;
708                 int need_comma = next_nfo && *next_nfo != '*' ? 1 : 0;
709                 if (line_len && line_len + 1 + str_len + need_comma >= (int)sizeof line_buf) {
710                         rprintf(f, "   %s\n", line_buf);
711                         line_len = 0;
712                 }
713                 if (!str)
714                         break;
715                 if (*str == '*') {
716                         rprintf(f, "%s:\n", str+1);
717                         continue;
718                 }
719                 line_len += snprintf(line_buf+line_len, sizeof line_buf - line_len, " %s%s", str, need_comma ? "," : "");
720         }
721 }
722
723 const char *rsync_version(void)
724 {
725         return RSYNC_GITVER;
726 }
727
728 static void print_rsync_version(enum logcode f)
729 {
730         char tmpbuf[256], *subprotocol = "";
731
732 #if SUBPROTOCOL_VERSION != 0
733         subprotocol = istring(".PR%d", SUBPROTOCOL_VERSION);
734 #endif
735         rprintf(f, "%s  version %s  protocol version %d%s\n",
736                 RSYNC_NAME, rsync_version(), PROTOCOL_VERSION, subprotocol);
737
738         rprintf(f, "Copyright (C) 1996-" LATEST_YEAR " by Andrew Tridgell, Wayne Davison, and others.\n");
739         rprintf(f, "Web site: https://rsync.samba.org/\n");
740
741         print_info_flags(f);
742
743         rprintf(f, "Checksum list:\n");
744         get_default_nno_list(&valid_checksums, tmpbuf, sizeof tmpbuf, '(');
745         rprintf(f, "    %s\n", tmpbuf);
746
747         rprintf(f, "Compress list:\n");
748         get_default_nno_list(&valid_compressions, tmpbuf, sizeof tmpbuf, '(');
749         rprintf(f, "    %s\n", tmpbuf);
750
751 #ifdef MAINTAINER_MODE
752         rprintf(f, "Panic Action: \"%s\"\n", get_panic_action());
753 #endif
754
755 #if SIZEOF_INT64 < 8
756         rprintf(f, "WARNING: no 64-bit integers on this platform!\n");
757 #endif
758         if (sizeof (int64) != SIZEOF_INT64) {
759                 rprintf(f,
760                         "WARNING: size mismatch in SIZEOF_INT64 define (%d != %d)\n",
761                         (int) SIZEOF_INT64, (int) sizeof (int64));
762         }
763
764         rprintf(f,"\n");
765         rprintf(f,"rsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and you\n");
766         rprintf(f,"are welcome to redistribute it under certain conditions.  See the GNU\n");
767         rprintf(f,"General Public Licence for details.\n");
768 }
769
770
771 void usage(enum logcode F)
772 {
773   print_rsync_version(F);
774
775   rprintf(F,"\n");
776   rprintf(F,"rsync is a file transfer program capable of efficient remote update\n");
777   rprintf(F,"via a fast differencing algorithm.\n");
778
779   rprintf(F,"\n");
780   rprintf(F,"Usage: rsync [OPTION]... SRC [SRC]... DEST\n");
781   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST\n");
782   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST\n");
783   rprintf(F,"  or   rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST\n");
784   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST:SRC [DEST]\n");
785   rprintf(F,"  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]\n");
786   rprintf(F,"  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]\n");
787   rprintf(F,"The ':' usages connect via remote shell, while '::' & 'rsync://' usages connect\n");
788   rprintf(F,"to an rsync daemon, and require SRC or DEST to start with a module name.\n");
789   rprintf(F,"\n");
790   rprintf(F,"Options\n");
791 #include "help-rsync.h"
792   rprintf(F,"\n");
793   rprintf(F,"Use \"rsync --daemon --help\" to see the daemon-mode command-line options.\n");
794   rprintf(F,"Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation.\n");
795   rprintf(F,"See https://rsync.samba.org/ for updates, bug reports, and answers\n");
796 }
797
798 enum {OPT_SERVER = 1000, OPT_DAEMON, OPT_SENDER, OPT_EXCLUDE, OPT_EXCLUDE_FROM,
799       OPT_FILTER, OPT_COMPARE_DEST, OPT_COPY_DEST, OPT_LINK_DEST, OPT_HELP,
800       OPT_INCLUDE, OPT_INCLUDE_FROM, OPT_MODIFY_WINDOW, OPT_MIN_SIZE, OPT_CHMOD,
801       OPT_READ_BATCH, OPT_WRITE_BATCH, OPT_ONLY_WRITE_BATCH, OPT_MAX_SIZE,
802       OPT_NO_D, OPT_APPEND, OPT_NO_ICONV, OPT_INFO, OPT_DEBUG, OPT_BLOCK_SIZE,
803       OPT_USERMAP, OPT_GROUPMAP, OPT_CHOWN, OPT_BWLIMIT, OPT_STDERR,
804       OPT_OLD_COMPRESS, OPT_NEW_COMPRESS, OPT_NO_COMPRESS,
805       OPT_STOP_AFTER, OPT_STOP_AT,
806       OPT_REFUSED_BASE = 9000};
807
808 static struct poptOption long_options[] = {
809   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
810   {"help",             0,  POPT_ARG_NONE,   0, OPT_HELP, 0, 0 },
811   {"version",         'V', POPT_ARG_NONE,   0, 'V', 0, 0},
812   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
813   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
814   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
815   {"info",             0,  POPT_ARG_STRING, 0, OPT_INFO, 0, 0 },
816   {"debug",            0,  POPT_ARG_STRING, 0, OPT_DEBUG, 0, 0 },
817   {"stderr",           0,  POPT_ARG_STRING, 0, OPT_STDERR, 0, 0 },
818   {"msgs2stderr",      0,  POPT_ARG_VAL,    &msgs2stderr, 1, 0, 0 },
819   {"no-msgs2stderr",   0,  POPT_ARG_VAL,    &msgs2stderr, 0, 0, 0 },
820   {"quiet",           'q', POPT_ARG_NONE,   0, 'q', 0, 0 },
821   {"motd",             0,  POPT_ARG_VAL,    &output_motd, 1, 0, 0 },
822   {"no-motd",          0,  POPT_ARG_VAL,    &output_motd, 0, 0, 0 },
823   {"stats",            0,  POPT_ARG_NONE,   &do_stats, 0, 0, 0 },
824   {"human-readable",  'h', POPT_ARG_NONE,   0, 'h', 0, 0},
825   {"no-human-readable",0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
826   {"no-h",             0,  POPT_ARG_VAL,    &human_readable, 0, 0, 0},
827   {"dry-run",         'n', POPT_ARG_NONE,   &dry_run, 0, 0, 0 },
828   {"archive",         'a', POPT_ARG_NONE,   0, 'a', 0, 0 },
829   {"recursive",       'r', POPT_ARG_VAL,    &recurse, 2, 0, 0 },
830   {"no-recursive",     0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
831   {"no-r",             0,  POPT_ARG_VAL,    &recurse, 0, 0, 0 },
832   {"inc-recursive",    0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
833   {"no-inc-recursive", 0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
834   {"i-r",              0,  POPT_ARG_VAL,    &allow_inc_recurse, 1, 0, 0 },
835   {"no-i-r",           0,  POPT_ARG_VAL,    &allow_inc_recurse, 0, 0, 0 },
836   {"dirs",            'd', POPT_ARG_VAL,    &xfer_dirs, 2, 0, 0 },
837   {"no-dirs",          0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
838   {"no-d",             0,  POPT_ARG_VAL,    &xfer_dirs, 0, 0, 0 },
839   {"old-dirs",         0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
840   {"old-d",            0,  POPT_ARG_VAL,    &xfer_dirs, 4, 0, 0 },
841   {"perms",           'p', POPT_ARG_VAL,    &preserve_perms, 1, 0, 0 },
842   {"no-perms",         0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
843   {"no-p",             0,  POPT_ARG_VAL,    &preserve_perms, 0, 0, 0 },
844   {"executability",   'E', POPT_ARG_NONE,   &preserve_executability, 0, 0, 0 },
845   {"acls",            'A', POPT_ARG_NONE,   0, 'A', 0, 0 },
846   {"no-acls",          0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
847   {"no-A",             0,  POPT_ARG_VAL,    &preserve_acls, 0, 0, 0 },
848   {"xattrs",          'X', POPT_ARG_NONE,   0, 'X', 0, 0 },
849   {"no-xattrs",        0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
850   {"no-X",             0,  POPT_ARG_VAL,    &preserve_xattrs, 0, 0, 0 },
851   {"times",           't', POPT_ARG_VAL,    &preserve_times, 1, 0, 0 },
852   {"no-times",         0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
853   {"no-t",             0,  POPT_ARG_VAL,    &preserve_times, 0, 0, 0 },
854   {"atimes",          'U', POPT_ARG_NONE,   0, 'U', 0, 0 },
855   {"no-atimes",        0,  POPT_ARG_VAL,    &preserve_atimes, 0, 0, 0 },
856   {"no-U",             0,  POPT_ARG_VAL,    &preserve_atimes, 0, 0, 0 },
857   {"open-noatime",     0,  POPT_ARG_VAL,    &open_noatime, 1, 0, 0 },
858   {"no-open-noatime",  0,  POPT_ARG_VAL,    &open_noatime, 0, 0, 0 },
859   {"crtimes",         'N', POPT_ARG_VAL,    &preserve_crtimes, 1, 0, 0 },
860   {"no-crtimes",       0,  POPT_ARG_VAL,    &preserve_crtimes, 0, 0, 0 },
861   {"no-N",             0,  POPT_ARG_VAL,    &preserve_crtimes, 0, 0, 0 },
862   {"omit-dir-times",  'O', POPT_ARG_VAL,    &omit_dir_times, 1, 0, 0 },
863   {"no-omit-dir-times",0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
864   {"no-O",             0,  POPT_ARG_VAL,    &omit_dir_times, 0, 0, 0 },
865   {"omit-link-times", 'J', POPT_ARG_VAL,    &omit_link_times, 1, 0, 0 },
866   {"no-omit-link-times",0, POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
867   {"no-J",             0,  POPT_ARG_VAL,    &omit_link_times, 0, 0, 0 },
868   {"modify-window",   '@', POPT_ARG_INT,    &modify_window, OPT_MODIFY_WINDOW, 0, 0 },
869   {"super",            0,  POPT_ARG_VAL,    &am_root, 2, 0, 0 },
870   {"no-super",         0,  POPT_ARG_VAL,    &am_root, 0, 0, 0 },
871   {"fake-super",       0,  POPT_ARG_VAL,    &am_root, -1, 0, 0 },
872   {"owner",           'o', POPT_ARG_VAL,    &preserve_uid, 1, 0, 0 },
873   {"no-owner",         0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
874   {"no-o",             0,  POPT_ARG_VAL,    &preserve_uid, 0, 0, 0 },
875   {"group",           'g', POPT_ARG_VAL,    &preserve_gid, 1, 0, 0 },
876   {"no-group",         0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
877   {"no-g",             0,  POPT_ARG_VAL,    &preserve_gid, 0, 0, 0 },
878   {0,                 'D', POPT_ARG_NONE,   0, 'D', 0, 0 },
879   {"no-D",             0,  POPT_ARG_NONE,   0, OPT_NO_D, 0, 0 },
880   {"devices",          0,  POPT_ARG_VAL,    &preserve_devices, 1, 0, 0 },
881   {"no-devices",       0,  POPT_ARG_VAL,    &preserve_devices, 0, 0, 0 },
882   {"write-devices",    0,  POPT_ARG_VAL,    &write_devices, 1, 0, 0 },
883   {"no-write-devices", 0,  POPT_ARG_VAL,    &write_devices, 0, 0, 0 },
884   {"specials",         0,  POPT_ARG_VAL,    &preserve_specials, 1, 0, 0 },
885   {"no-specials",      0,  POPT_ARG_VAL,    &preserve_specials, 0, 0, 0 },
886   {"links",           'l', POPT_ARG_VAL,    &preserve_links, 1, 0, 0 },
887   {"no-links",         0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
888   {"no-l",             0,  POPT_ARG_VAL,    &preserve_links, 0, 0, 0 },
889   {"copy-links",      'L', POPT_ARG_NONE,   &copy_links, 0, 0, 0 },
890   {"copy-unsafe-links",0,  POPT_ARG_NONE,   &copy_unsafe_links, 0, 0, 0 },
891   {"safe-links",       0,  POPT_ARG_NONE,   &safe_symlinks, 0, 0, 0 },
892   {"munge-links",      0,  POPT_ARG_VAL,    &munge_symlinks, 1, 0, 0 },
893   {"no-munge-links",   0,  POPT_ARG_VAL,    &munge_symlinks, 0, 0, 0 },
894   {"copy-dirlinks",   'k', POPT_ARG_NONE,   &copy_dirlinks, 0, 0, 0 },
895   {"keep-dirlinks",   'K', POPT_ARG_NONE,   &keep_dirlinks, 0, 0, 0 },
896   {"hard-links",      'H', POPT_ARG_NONE,   0, 'H', 0, 0 },
897   {"no-hard-links",    0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
898   {"no-H",             0,  POPT_ARG_VAL,    &preserve_hard_links, 0, 0, 0 },
899   {"relative",        'R', POPT_ARG_VAL,    &relative_paths, 1, 0, 0 },
900   {"no-relative",      0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
901   {"no-R",             0,  POPT_ARG_VAL,    &relative_paths, 0, 0, 0 },
902   {"implied-dirs",     0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
903   {"no-implied-dirs",  0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
904   {"i-d",              0,  POPT_ARG_VAL,    &implied_dirs, 1, 0, 0 },
905   {"no-i-d",           0,  POPT_ARG_VAL,    &implied_dirs, 0, 0, 0 },
906   {"chmod",            0,  POPT_ARG_STRING, 0, OPT_CHMOD, 0, 0 },
907   {"ignore-times",    'I', POPT_ARG_NONE,   &ignore_times, 0, 0, 0 },
908   {"size-only",        0,  POPT_ARG_NONE,   &size_only, 0, 0, 0 },
909   {"one-file-system", 'x', POPT_ARG_NONE,   0, 'x', 0, 0 },
910   {"no-one-file-system",0, POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
911   {"no-x",             0,  POPT_ARG_VAL,    &one_file_system, 0, 0, 0 },
912   {"update",          'u', POPT_ARG_NONE,   &update_only, 0, 0, 0 },
913   {"existing",         0,  POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
914   {"ignore-non-existing",0,POPT_ARG_NONE,   &ignore_non_existing, 0, 0, 0 },
915   {"ignore-existing",  0,  POPT_ARG_NONE,   &ignore_existing, 0, 0, 0 },
916   {"max-size",         0,  POPT_ARG_STRING, &max_size_arg, OPT_MAX_SIZE, 0, 0 },
917   {"min-size",         0,  POPT_ARG_STRING, &min_size_arg, OPT_MIN_SIZE, 0, 0 },
918   {"max-alloc",        0,  POPT_ARG_STRING, &max_alloc_arg, 0, 0, 0 },
919   {"sparse",          'S', POPT_ARG_VAL,    &sparse_files, 1, 0, 0 },
920   {"no-sparse",        0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
921   {"no-S",             0,  POPT_ARG_VAL,    &sparse_files, 0, 0, 0 },
922   {"preallocate",      0,  POPT_ARG_NONE,   &preallocate_files, 0, 0, 0},
923   {"inplace",          0,  POPT_ARG_VAL,    &inplace, 1, 0, 0 },
924   {"no-inplace",       0,  POPT_ARG_VAL,    &inplace, 0, 0, 0 },
925   {"append",           0,  POPT_ARG_NONE,   0, OPT_APPEND, 0, 0 },
926   {"append-verify",    0,  POPT_ARG_VAL,    &append_mode, 2, 0, 0 },
927   {"no-append",        0,  POPT_ARG_VAL,    &append_mode, 0, 0, 0 },
928   {"del",              0,  POPT_ARG_NONE,   &delete_during, 0, 0, 0 },
929   {"delete",           0,  POPT_ARG_NONE,   &delete_mode, 0, 0, 0 },
930   {"delete-before",    0,  POPT_ARG_NONE,   &delete_before, 0, 0, 0 },
931   {"delete-during",    0,  POPT_ARG_VAL,    &delete_during, 1, 0, 0 },
932   {"delete-delay",     0,  POPT_ARG_VAL,    &delete_during, 2, 0, 0 },
933   {"delete-after",     0,  POPT_ARG_NONE,   &delete_after, 0, 0, 0 },
934   {"delete-excluded",  0,  POPT_ARG_NONE,   &delete_excluded, 0, 0, 0 },
935   {"delete-missing-args",0,POPT_BIT_SET,    &missing_args, 2, 0, 0 },
936   {"ignore-missing-args",0,POPT_BIT_SET,    &missing_args, 1, 0, 0 },
937   {"remove-sent-files",0,  POPT_ARG_VAL,    &remove_source_files, 2, 0, 0 }, /* deprecated */
938   {"remove-source-files",0,POPT_ARG_VAL,    &remove_source_files, 1, 0, 0 },
939   {"force",            0,  POPT_ARG_VAL,    &force_delete, 1, 0, 0 },
940   {"no-force",         0,  POPT_ARG_VAL,    &force_delete, 0, 0, 0 },
941   {"ignore-errors",    0,  POPT_ARG_VAL,    &ignore_errors, 1, 0, 0 },
942   {"no-ignore-errors", 0,  POPT_ARG_VAL,    &ignore_errors, 0, 0, 0 },
943   {"max-delete",       0,  POPT_ARG_INT,    &max_delete, 0, 0, 0 },
944   {0,                 'F', POPT_ARG_NONE,   0, 'F', 0, 0 },
945   {"filter",          'f', POPT_ARG_STRING, 0, OPT_FILTER, 0, 0 },
946   {"exclude",          0,  POPT_ARG_STRING, 0, OPT_EXCLUDE, 0, 0 },
947   {"include",          0,  POPT_ARG_STRING, 0, OPT_INCLUDE, 0, 0 },
948   {"exclude-from",     0,  POPT_ARG_STRING, 0, OPT_EXCLUDE_FROM, 0, 0 },
949   {"include-from",     0,  POPT_ARG_STRING, 0, OPT_INCLUDE_FROM, 0, 0 },
950   {"cvs-exclude",     'C', POPT_ARG_NONE,   &cvs_exclude, 0, 0, 0 },
951   {"whole-file",      'W', POPT_ARG_VAL,    &whole_file, 1, 0, 0 },
952   {"no-whole-file",    0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
953   {"no-W",             0,  POPT_ARG_VAL,    &whole_file, 0, 0, 0 },
954   {"checksum",        'c', POPT_ARG_VAL,    &always_checksum, 1, 0, 0 },
955   {"no-checksum",      0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
956   {"no-c",             0,  POPT_ARG_VAL,    &always_checksum, 0, 0, 0 },
957   {"checksum-choice",  0,  POPT_ARG_STRING, &checksum_choice, 0, 0, 0 },
958   {"cc",               0,  POPT_ARG_STRING, &checksum_choice, 0, 0, 0 },
959   {"block-size",      'B', POPT_ARG_STRING, 0, OPT_BLOCK_SIZE, 0, 0 },
960   {"compare-dest",     0,  POPT_ARG_STRING, 0, OPT_COMPARE_DEST, 0, 0 },
961   {"copy-dest",        0,  POPT_ARG_STRING, 0, OPT_COPY_DEST, 0, 0 },
962   {"link-dest",        0,  POPT_ARG_STRING, 0, OPT_LINK_DEST, 0, 0 },
963   {"fuzzy",           'y', POPT_ARG_NONE,   0, 'y', 0, 0 },
964   {"no-fuzzy",         0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
965   {"no-y",             0,  POPT_ARG_VAL,    &fuzzy_basis, 0, 0, 0 },
966   {"compress",        'z', POPT_ARG_NONE,   0, 'z', 0, 0 },
967   {"old-compress",     0,  POPT_ARG_NONE,   0, OPT_OLD_COMPRESS, 0, 0 },
968   {"new-compress",     0,  POPT_ARG_NONE,   0, OPT_NEW_COMPRESS, 0, 0 },
969   {"no-compress",      0,  POPT_ARG_NONE,   0, OPT_NO_COMPRESS, 0, 0 },
970   {"no-z",             0,  POPT_ARG_NONE,   0, OPT_NO_COMPRESS, 0, 0 },
971   {"compress-choice",  0,  POPT_ARG_STRING, &compress_choice, 0, 0, 0 },
972   {"zc",               0,  POPT_ARG_STRING, &compress_choice, 0, 0, 0 },
973   {"skip-compress",    0,  POPT_ARG_STRING, &skip_compress, 0, 0, 0 },
974   {"compress-level",   0,  POPT_ARG_INT,    &do_compression_level, 0, 0, 0 },
975   {"zl",               0,  POPT_ARG_INT,    &do_compression_level, 0, 0, 0 },
976   {0,                 'P', POPT_ARG_NONE,   0, 'P', 0, 0 },
977   {"progress",         0,  POPT_ARG_VAL,    &do_progress, 1, 0, 0 },
978   {"no-progress",      0,  POPT_ARG_VAL,    &do_progress, 0, 0, 0 },
979   {"partial",          0,  POPT_ARG_VAL,    &keep_partial, 1, 0, 0 },
980   {"no-partial",       0,  POPT_ARG_VAL,    &keep_partial, 0, 0, 0 },
981   {"partial-dir",      0,  POPT_ARG_STRING, &partial_dir, 0, 0, 0 },
982   {"delay-updates",    0,  POPT_ARG_VAL,    &delay_updates, 1, 0, 0 },
983   {"no-delay-updates", 0,  POPT_ARG_VAL,    &delay_updates, 0, 0, 0 },
984   {"prune-empty-dirs",'m', POPT_ARG_VAL,    &prune_empty_dirs, 1, 0, 0 },
985   {"no-prune-empty-dirs",0,POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
986   {"no-m",             0,  POPT_ARG_VAL,    &prune_empty_dirs, 0, 0, 0 },
987   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
988   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
989   {"out-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 },
990   {"log-format",       0,  POPT_ARG_STRING, &stdout_format, 0, 0, 0 }, /* DEPRECATED */
991   {"itemize-changes", 'i', POPT_ARG_NONE,   0, 'i', 0, 0 },
992   {"no-itemize-changes",0, POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
993   {"no-i",             0,  POPT_ARG_VAL,    &itemize_changes, 0, 0, 0 },
994   {"bwlimit",          0,  POPT_ARG_STRING, &bwlimit_arg, OPT_BWLIMIT, 0, 0 },
995   {"no-bwlimit",       0,  POPT_ARG_VAL,    &bwlimit, 0, 0, 0 },
996   {"backup",          'b', POPT_ARG_VAL,    &make_backups, 1, 0, 0 },
997   {"no-backup",        0,  POPT_ARG_VAL,    &make_backups, 0, 0, 0 },
998   {"backup-dir",       0,  POPT_ARG_STRING, &backup_dir, 0, 0, 0 },
999   {"suffix",           0,  POPT_ARG_STRING, &backup_suffix, 0, 0, 0 },
1000   {"list-only",        0,  POPT_ARG_VAL,    &list_only, 2, 0, 0 },
1001   {"read-batch",       0,  POPT_ARG_STRING, &batch_name, OPT_READ_BATCH, 0, 0 },
1002   {"write-batch",      0,  POPT_ARG_STRING, &batch_name, OPT_WRITE_BATCH, 0, 0 },
1003   {"only-write-batch", 0,  POPT_ARG_STRING, &batch_name, OPT_ONLY_WRITE_BATCH, 0, 0 },
1004   {"files-from",       0,  POPT_ARG_STRING, &files_from, 0, 0, 0 },
1005   {"from0",           '0', POPT_ARG_VAL,    &eol_nulls, 1, 0, 0},
1006   {"no-from0",         0,  POPT_ARG_VAL,    &eol_nulls, 0, 0, 0},
1007   {"protect-args",    's', POPT_ARG_VAL,    &protect_args, 1, 0, 0},
1008   {"no-protect-args",  0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1009   {"no-s",             0,  POPT_ARG_VAL,    &protect_args, 0, 0, 0},
1010   {"numeric-ids",      0,  POPT_ARG_VAL,    &numeric_ids, 1, 0, 0 },
1011   {"no-numeric-ids",   0,  POPT_ARG_VAL,    &numeric_ids, 0, 0, 0 },
1012   {"usermap",          0,  POPT_ARG_STRING, 0, OPT_USERMAP, 0, 0 },
1013   {"groupmap",         0,  POPT_ARG_STRING, 0, OPT_GROUPMAP, 0, 0 },
1014   {"chown",            0,  POPT_ARG_STRING, 0, OPT_CHOWN, 0, 0 },
1015   {"timeout",          0,  POPT_ARG_INT,    &io_timeout, 0, 0, 0 },
1016   {"no-timeout",       0,  POPT_ARG_VAL,    &io_timeout, 0, 0, 0 },
1017   {"contimeout",       0,  POPT_ARG_INT,    &connect_timeout, 0, 0, 0 },
1018   {"no-contimeout",    0,  POPT_ARG_VAL,    &connect_timeout, 0, 0, 0 },
1019   {"stop-after",       0,  POPT_ARG_STRING, 0, OPT_STOP_AFTER, 0, 0 },
1020   {"time-limit",       0,  POPT_ARG_STRING, 0, OPT_STOP_AFTER, 0, 0 }, /* earlier stop-after name */
1021   {"stop-at",          0,  POPT_ARG_STRING, 0, OPT_STOP_AT, 0, 0 },
1022   {"rsh",             'e', POPT_ARG_STRING, &shell_cmd, 0, 0, 0 },
1023   {"rsync-path",       0,  POPT_ARG_STRING, &rsync_path, 0, 0, 0 },
1024   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1025   {"iconv",            0,  POPT_ARG_STRING, &iconv_opt, 0, 0, 0 },
1026   {"no-iconv",         0,  POPT_ARG_NONE,   0, OPT_NO_ICONV, 0, 0 },
1027   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1028   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1029   {"8-bit-output",    '8', POPT_ARG_VAL,    &allow_8bit_chars, 1, 0, 0 },
1030   {"no-8-bit-output",  0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1031   {"no-8",             0,  POPT_ARG_VAL,    &allow_8bit_chars, 0, 0, 0 },
1032   {"mkpath",           0,  POPT_ARG_VAL,    &mkpath_dest_arg, 1, 0, 0 },
1033   {"no-mkpath",        0,  POPT_ARG_VAL,    &mkpath_dest_arg, 0, 0, 0 },
1034   {"qsort",            0,  POPT_ARG_NONE,   &use_qsort, 0, 0, 0 },
1035   {"copy-as",          0,  POPT_ARG_STRING, &copy_as, 0, 0, 0 },
1036   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1037   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1038   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1039   {"password-file",    0,  POPT_ARG_STRING, &password_file, 0, 0, 0 },
1040   {"early-input",      0,  POPT_ARG_STRING, &early_input_file, 0, 0, 0 },
1041   {"blocking-io",      0,  POPT_ARG_VAL,    &blocking_io, 1, 0, 0 },
1042   {"no-blocking-io",   0,  POPT_ARG_VAL,    &blocking_io, 0, 0, 0 },
1043   {"outbuf",           0,  POPT_ARG_STRING, &outbuf_mode, 0, 0, 0 },
1044   {"remote-option",   'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1045   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1046   {"checksum-seed",    0,  POPT_ARG_INT,    &checksum_seed, 0, 0, 0 },
1047   {"server",           0,  POPT_ARG_NONE,   0, OPT_SERVER, 0, 0 },
1048   {"sender",           0,  POPT_ARG_NONE,   0, OPT_SENDER, 0, 0 },
1049   /* All the following options switch us into daemon-mode option-parsing. */
1050   {"config",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1051   {"daemon",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1052   {"dparam",           0,  POPT_ARG_STRING, 0, OPT_DAEMON, 0, 0 },
1053   {"detach",           0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1054   {"no-detach",        0,  POPT_ARG_NONE,   0, OPT_DAEMON, 0, 0 },
1055   {0,0,0,0, 0, 0, 0}
1056 };
1057
1058 static void daemon_usage(enum logcode F)
1059 {
1060   print_rsync_version(F);
1061
1062   rprintf(F,"\n");
1063   rprintf(F,"Usage: rsync --daemon [OPTION]...\n");
1064 #include "help-rsyncd.h"
1065   rprintf(F,"\n");
1066   rprintf(F,"If you were not trying to invoke rsync as a daemon, avoid using any of the\n");
1067   rprintf(F,"daemon-specific rsync options.  See also the rsyncd.conf(5) man page.\n");
1068 }
1069
1070 static struct poptOption long_daemon_options[] = {
1071   /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
1072   {"address",          0,  POPT_ARG_STRING, &bind_address, 0, 0, 0 },
1073   {"bwlimit",          0,  POPT_ARG_INT,    &daemon_bwlimit, 0, 0, 0 },
1074   {"config",           0,  POPT_ARG_STRING, &config_file, 0, 0, 0 },
1075   {"daemon",           0,  POPT_ARG_NONE,   &daemon_opt, 0, 0, 0 },
1076   {"dparam",          'M', POPT_ARG_STRING, 0, 'M', 0, 0 },
1077   {"ipv4",            '4', POPT_ARG_VAL,    &default_af_hint, AF_INET, 0, 0 },
1078   {"ipv6",            '6', POPT_ARG_VAL,    &default_af_hint, AF_INET6, 0, 0 },
1079   {"detach",           0,  POPT_ARG_VAL,    &no_detach, 0, 0, 0 },
1080   {"no-detach",        0,  POPT_ARG_VAL,    &no_detach, 1, 0, 0 },
1081   {"log-file",         0,  POPT_ARG_STRING, &logfile_name, 0, 0, 0 },
1082   {"log-file-format",  0,  POPT_ARG_STRING, &logfile_format, 0, 0, 0 },
1083   {"port",             0,  POPT_ARG_INT,    &rsync_port, 0, 0, 0 },
1084   {"sockopts",         0,  POPT_ARG_STRING, &sockopts, 0, 0, 0 },
1085   {"protocol",         0,  POPT_ARG_INT,    &protocol_version, 0, 0, 0 },
1086   {"server",           0,  POPT_ARG_NONE,   &am_server, 0, 0, 0 },
1087   {"temp-dir",        'T', POPT_ARG_STRING, &tmpdir, 0, 0, 0 },
1088   {"verbose",         'v', POPT_ARG_NONE,   0, 'v', 0, 0 },
1089   {"no-verbose",       0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1090   {"no-v",             0,  POPT_ARG_VAL,    &verbose, 0, 0, 0 },
1091   {"help",            'h', POPT_ARG_NONE,   0, 'h', 0, 0 },
1092   {0,0,0,0, 0, 0, 0}
1093 };
1094
1095
1096 static char err_buf[200];
1097
1098
1099 /**
1100  * Store the option error message, if any, so that we can log the
1101  * connection attempt (which requires parsing the options), and then
1102  * show the error later on.
1103  **/
1104 void option_error(void)
1105 {
1106         if (!err_buf[0]) {
1107                 strlcpy(err_buf, "Error parsing options: option may "
1108                         "be supported on client but not on server?\n",
1109                         sizeof err_buf);
1110         }
1111
1112         rprintf(FERROR, RSYNC_NAME ": %s", err_buf);
1113         io_flush(MSG_FLUSH);
1114         msleep(20);
1115 }
1116
1117
1118 static void parse_one_refuse_match(int negated, const char *ref, const struct poptOption *list_end)
1119 {
1120         struct poptOption *op;
1121         char shortName[2];
1122         int is_wild = strpbrk(ref, "*?[") != NULL;
1123         int found_match = 0;
1124
1125         shortName[1] = '\0';
1126
1127         if (strcmp("a", ref) == 0 || strcmp("archive", ref) == 0) {
1128                 ref = "[ardlptgoD]";
1129                 is_wild = 1;
1130         }
1131
1132         for (op = long_options; op != list_end; op++) {
1133                 *shortName = op->shortName;
1134                 if ((op->longName && wildmatch(ref, op->longName))
1135                  || (*shortName && wildmatch(ref, shortName))) {
1136                         if (op->descrip[1] == '*')
1137                                 op->descrip = negated ? "a*" : "r*";
1138                         else if (!is_wild)
1139                                 op->descrip = negated ? "a=" : "r=";
1140                         found_match = 1;
1141                         if (!is_wild)
1142                                 break;
1143                 }
1144         }
1145
1146         if (!found_match)
1147                 rprintf(FLOG, "No match for refuse-options string \"%s\"\n", ref);
1148 }
1149
1150
1151 /**
1152  * Tweak the option table to disable all options that the rsyncd.conf
1153  * file has told us to refuse.
1154  **/
1155 static void set_refuse_options(void)
1156 {
1157         struct poptOption *op, *list_end = NULL;
1158         char *cp, *ref = lp_refuse_options(module_id);
1159         int negated;
1160
1161         if (!ref)
1162                 ref = "";
1163
1164         if (!am_daemon)
1165                 ref = "";
1166
1167         /* We abuse the descrip field in poptOption to make it easy to flag which options
1168          * are refused (since we don't use it otherwise).  Start by marking all options
1169          * as "a"ccepted with a few options also marked as non-wild. */
1170         for (op = long_options; ; op++) {
1171                 const char *longName = op->longName ? op->longName : "";
1172                 if (!op->longName && !op->shortName) {
1173                         list_end = op;
1174                         break;
1175                 }
1176                 if (!am_daemon
1177                  || op->shortName == 'e' /* Required for compatibility flags */
1178                  || op->shortName == '0' /* --from0 just modifies --files-from, so refuse that instead (or not) */
1179                  || op->shortName == 's' /* --protect-args is always OK */
1180                  || op->shortName == 'n' /* --dry-run is always OK */
1181                  || strcmp("iconv", longName) == 0
1182                  || strcmp("no-iconv", longName) == 0
1183                  || strcmp("checksum-seed", longName) == 0
1184                  || strcmp("write-devices", longName) == 0 /* disable wild-match (it gets refused below) */
1185                  || strcmp("log-format", longName) == 0 /* aka out-format (NOT log-file-format) */
1186                  || strcmp("sender", longName) == 0
1187                  || strcmp("server", longName) == 0)
1188                         op->descrip = "a="; /* exact-match only */
1189                 else
1190                         op->descrip = "a*"; /* wild-card-able */
1191         }
1192         assert(list_end != NULL);
1193
1194         if (am_daemon) { /* Refused by default, but can be accepted via a negated exact match. */
1195                 parse_one_refuse_match(0, "write-devices", list_end);
1196         }
1197
1198         while (1) {
1199                 while (*ref == ' ') ref++;
1200                 if (!*ref)
1201                         break;
1202                 if ((cp = strchr(ref, ' ')) != NULL)
1203                         *cp = '\0';
1204                 negated = *ref == '!';
1205                 if (negated && ref[1])
1206                         ref++;
1207                 parse_one_refuse_match(negated, ref, list_end);
1208                 if (!cp)
1209                         break;
1210                 *cp = ' ';
1211                 ref = cp + 1;
1212         }
1213
1214         if (am_daemon) {
1215 #ifdef ICONV_OPTION
1216                 if (!*lp_charset(module_id))
1217                         parse_one_refuse_match(0, "iconv", list_end);
1218 #endif
1219                 parse_one_refuse_match(0, "log-file*", list_end);
1220         }
1221
1222 #ifndef SUPPORT_ATIMES
1223         parse_one_refuse_match(0, "atimes", list_end);
1224 #endif
1225 #ifndef SUPPORT_HARD_LINKS
1226         parse_one_refuse_match(0, "link-dest", list_end);
1227 #endif
1228 #ifndef HAVE_MKTIME
1229         parse_one_refuse_match(0, "stop-at", list_end);
1230 #endif
1231 #ifndef ICONV_OPTION
1232         parse_one_refuse_match(0, "iconv", list_end);
1233 #endif
1234 #ifndef HAVE_SETVBUF
1235         parse_one_refuse_match(0, "outbuf", list_end);
1236 #endif
1237 #ifndef SUPPORT_CRTIMES
1238         parse_one_refuse_match(0, "crtimes", list_end);
1239 #endif
1240
1241         /* Now we use the descrip values to actually mark the options for refusal. */
1242         for (op = long_options; op != list_end; op++) {
1243                 int refused = op->descrip[0] == 'r';
1244                 op->descrip = NULL;
1245                 if (!refused)
1246                         continue;
1247                 if (op->argInfo == POPT_ARG_VAL)
1248                         op->argInfo = POPT_ARG_NONE;
1249                 op->val = (op - long_options) + OPT_REFUSED_BASE;
1250                 /* The following flags are set to let us easily check an implied option later in the code. */
1251                 switch (op->shortName) {
1252                 case 'r': case 'd': case 'l': case 'p':
1253                 case 't': case 'g': case 'o': case 'D':
1254                         refused_archive_part = op->val;
1255                         break;
1256                 case 'z':
1257                         refused_compress = op->val;
1258                         break;
1259                 case '\0':
1260                         if (strcmp("delete", op->longName) == 0)
1261                                 refused_delete = op->val;
1262                         else if (strcmp("delete-before", op->longName) == 0)
1263                                 refused_delete_before = op->val;
1264                         else if (strcmp("delete-during", op->longName) == 0)
1265                                 refused_delete_during = op->val;
1266                         else if (strcmp("partial", op->longName) == 0)
1267                                 refused_partial = op->val;
1268                         else if (strcmp("progress", op->longName) == 0)
1269                                 refused_progress = op->val;
1270                         else if (strcmp("inplace", op->longName) == 0)
1271                                 refused_inplace = op->val;
1272                         else if (strcmp("no-iconv", op->longName) == 0)
1273                                 refused_no_iconv = op->val;
1274                         break;
1275                 }
1276         }
1277 }
1278
1279
1280 static int count_args(const char **argv)
1281 {
1282         int i = 0;
1283
1284         if (argv) {
1285                 while (argv[i] != NULL)
1286                         i++;
1287         }
1288
1289         return i;
1290 }
1291
1292 /* If the size_arg is an invalid string or the value is < min_value, an error
1293  * is put into err_buf & the return is -1.  Note that this parser does NOT
1294  * support negative numbers, so a min_value < 0 doesn't make any sense. */
1295 static ssize_t parse_size_arg(const char *size_arg, char def_suf, const char *opt_name,
1296                               ssize_t min_value, ssize_t max_value, BOOL unlimited_0)
1297 {
1298         int reps, mult, len;
1299         const char *arg, *err = "invalid", *min_max = NULL;
1300         ssize_t limit = -1, size = 1;
1301
1302         for (arg = size_arg; isDigit(arg); arg++) {}
1303         if (*arg == '.' || *arg == get_decimal_point()) /* backward compatibility: always allow '.' */
1304                 for (arg++; isDigit(arg); arg++) {}
1305         switch (*arg && *arg != '+' && *arg != '-' ? *arg++ : def_suf) {
1306         case 'b': case 'B':
1307                 reps = 0;
1308                 break;
1309         case 'k': case 'K':
1310                 reps = 1;
1311                 break;
1312         case 'm': case 'M':
1313                 reps = 2;
1314                 break;
1315         case 'g': case 'G':
1316                 reps = 3;
1317                 break;
1318         case 't': case 'T':
1319                 reps = 4;
1320                 break;
1321         case 'p': case 'P':
1322                 reps = 5;
1323                 break;
1324         default:
1325                 goto failure;
1326         }
1327         if (*arg == 'b' || *arg == 'B')
1328                 mult = 1000, arg++;
1329         else if (!*arg || *arg == '+' || *arg == '-')
1330                 mult = 1024;
1331         else if (strncasecmp(arg, "ib", 2) == 0)
1332                 mult = 1024, arg += 2;
1333         else
1334                 goto failure;
1335         while (reps--)
1336                 size *= mult;
1337         size *= atof(size_arg);
1338         if ((*arg == '+' || *arg == '-') && arg[1] == '1' && arg != size_arg)
1339                 size += atoi(arg), arg += 2;
1340         if (*arg)
1341                 goto failure;
1342         if (size < 0 || (max_value >= 0 && size > max_value)) {
1343                 err = "too large";
1344                 min_max = "max";
1345                 limit = max_value;
1346                 goto failure;
1347         }
1348         if (size < min_value && (!unlimited_0 || size != 0)) {
1349                 err = "too small";
1350                 min_max = "min";
1351                 limit = min_value;
1352                 goto failure;
1353         }
1354         return size;
1355
1356 failure:
1357         len = snprintf(err_buf, sizeof err_buf - 1, "--%s=%s is %s", opt_name, size_arg, err);
1358         if (min_max && limit >= 0 && len < (int)sizeof err_buf - 10) {
1359                 len += snprintf(err_buf + len, sizeof err_buf - len - 1, " (%s: %s%s)",
1360                         min_max, do_big_num(limit, 3, NULL),
1361                         unlimited_0 && min_max[1] == 'i' ? " or 0 for unlimited" : "");
1362         }
1363         err_buf[len] = '\n';
1364         err_buf[len+1] = '\0';
1365         return -1;
1366 }
1367
1368 #ifdef HAVE_MKTIME
1369 /* Allow the user to specify a time in the format yyyy-mm-ddThh:mm while
1370  * also allowing abbreviated data.  For instance, if the time is omitted,
1371  * it defaults to midnight.  If the date is omitted, it defaults to the
1372  * next possible date in the future with the specified time.  Even the
1373  * year or year-month can be omitted, again defaulting to the next date
1374  * in the future that matches the specified information.  A 2-digit year
1375  * is also OK, as is using '/' instead of '-'. */
1376 static time_t parse_time(const char *arg)
1377 {
1378         const char *cp;
1379         time_t val, now = time(NULL);
1380         struct tm t, *today = localtime(&now);
1381         int in_date, old_mday, n;
1382
1383         memset(&t, 0, sizeof t);
1384         t.tm_year = t.tm_mon = t.tm_mday = -1;
1385         t.tm_hour = t.tm_min = t.tm_isdst = -1;
1386         cp = arg;
1387         if (*cp == 'T' || *cp == 't' || *cp == ':') {
1388                 in_date = *cp == ':' ? 0 : -1;
1389                 cp++;
1390         } else
1391                 in_date = 1;
1392         for ( ; ; cp++) {
1393                 if (!isDigit(cp))
1394                         return (time_t)-1;
1395                 n = 0;
1396                 do {
1397                         n = n * 10 + *cp++ - '0';
1398                 } while (isDigit(cp));
1399                 if (*cp == ':')
1400                         in_date = 0;
1401                 if (in_date > 0) {
1402                         if (t.tm_year != -1)
1403                                 return (time_t)-1;
1404                         t.tm_year = t.tm_mon;
1405                         t.tm_mon = t.tm_mday;
1406                         t.tm_mday = n;
1407                         if (!*cp)
1408                                 break;
1409                         if (*cp == 'T' || *cp == 't') {
1410                                 if (!cp[1])
1411                                         break;
1412                                 in_date = -1;
1413                         } else if (*cp != '-' && *cp != '/')
1414                                 return (time_t)-1;
1415                         continue;
1416                 }
1417                 if (t.tm_hour != -1)
1418                         return (time_t)-1;
1419                 t.tm_hour = t.tm_min;
1420                 t.tm_min = n;
1421                 if (!*cp) {
1422                         if (in_date < 0)
1423                                 return (time_t)-1;
1424                         break;
1425                 }
1426                 if (*cp != ':')
1427                         return (time_t)-1;
1428                 in_date = 0;
1429         }
1430
1431         in_date = 0;
1432         if (t.tm_year < 0) {
1433                 t.tm_year = today->tm_year;
1434                 in_date = 1;
1435         } else if (t.tm_year < 100) {
1436                 while (t.tm_year < today->tm_year)
1437                         t.tm_year += 100;
1438         } else
1439                 t.tm_year -= 1900;
1440         if (t.tm_mon < 0) {
1441                 t.tm_mon = today->tm_mon;
1442                 in_date = 2;
1443         } else
1444                 t.tm_mon--;
1445         if (t.tm_mday < 0) {
1446                 t.tm_mday = today->tm_mday;
1447                 in_date = 3;
1448         }
1449
1450         n = 0;
1451         if (t.tm_min < 0) {
1452                 t.tm_hour = t.tm_min = 0;
1453         } else if (t.tm_hour < 0) {
1454                 if (in_date != 3)
1455                         return (time_t)-1;
1456                 in_date = 0;
1457                 t.tm_hour = today->tm_hour;
1458                 n = 60*60;
1459         }
1460
1461         /* Note that mktime() might change a too-large tm_mday into the start of
1462          * the following month which we need to undo in the following code! */
1463         old_mday = t.tm_mday;
1464         if (t.tm_hour > 23 || t.tm_min > 59
1465             || t.tm_mon < 0 || t.tm_mon >= 12
1466             || t.tm_mday < 1 || t.tm_mday > 31
1467             || (val = mktime(&t)) == (time_t)-1)
1468                 return (time_t)-1;
1469
1470         while (in_date && (val <= now || t.tm_mday < old_mday)) {
1471                 switch (in_date) {
1472                 case 3:
1473                         old_mday = ++t.tm_mday;
1474                         break;
1475                 case 2:
1476                         if (t.tm_mday < old_mday)
1477                                 t.tm_mday = old_mday; /* The month already got bumped forward */
1478                         else if (++t.tm_mon == 12) {
1479                                 t.tm_mon = 0;
1480                                 t.tm_year++;
1481                         }
1482                         break;
1483                 case 1:
1484                         if (t.tm_mday < old_mday) {
1485                                 /* mon==1 mday==29 got bumped to mon==2 */
1486                                 if (t.tm_mon != 2 || old_mday != 29)
1487                                         return (time_t)-1;
1488                                 t.tm_mon = 1;
1489                                 t.tm_mday = 29;
1490                         }
1491                         t.tm_year++;
1492                         break;
1493                 }
1494                 if ((val = mktime(&t)) == (time_t)-1) {
1495                         /* This code shouldn't be needed, as mktime() should auto-round to the next month. */
1496                         if (in_date != 3 || t.tm_mday <= 28)
1497                                 return (time_t)-1;
1498                         t.tm_mday = old_mday = 1;
1499                         in_date = 2;
1500                 }
1501         }
1502         if (n) {
1503                 while (val <= now)
1504                         val += n;
1505         }
1506         return val;
1507 }
1508 #endif
1509
1510 static void create_refuse_error(int which)
1511 {
1512         const char *msg;
1513         if (am_daemon)
1514                 msg = "The server is configured to refuse";
1515         else if (am_server)
1516                 msg = "The server does not support";
1517         else
1518                 msg = "This rsync does not support";
1519
1520         /* The "which" value is the index + OPT_REFUSED_BASE. */
1521         struct poptOption *op = &long_options[which - OPT_REFUSED_BASE];
1522         int n = snprintf(err_buf, sizeof err_buf, "%s --%s\n", msg, op->longName) - 1;
1523         if (op->shortName)
1524                 snprintf(err_buf + n, sizeof err_buf - n, " (-%c)\n", op->shortName);
1525 }
1526
1527 /* This is used to make sure that --daemon & --server cannot be aliased to
1528  * something else. These options have always disabled popt aliases for the
1529  * parsing of a daemon or server command-line, but we have to make sure that
1530  * these options cannot vanish so that the alias disabling can take effect. */
1531 static void popt_unalias(poptContext con, const char *opt)
1532 {
1533         struct poptAlias unalias;
1534
1535         memset(&unalias, 0, sizeof unalias);
1536
1537         unalias.longName = opt + 2; /* point past the leading "--" */
1538         unalias.argc = 1;
1539         unalias.argv = new_array0(const char*, 2);
1540         unalias.argv[0] = strdup(opt);
1541
1542         poptAddAlias(con, unalias, 0);
1543 }
1544
1545 char *alt_dest_opt(int type)
1546 {
1547         if (!type)
1548                 type = alt_dest_type;
1549
1550         switch (type) {
1551         case COMPARE_DEST:
1552                 return "--compare-dest";
1553         case COPY_DEST:
1554                 return "--copy-dest";
1555         case LINK_DEST:
1556                 return "--link-dest";
1557         default:
1558                 NOISY_DEATH("Unknown alt_dest_opt type");
1559         }
1560 }
1561
1562 /**
1563  * Process command line arguments.  Called on both local and remote.
1564  *
1565  * @retval 1 if all options are OK; with globals set to appropriate
1566  * values
1567  *
1568  * @retval 0 on error, with err_buf containing an explanation
1569  **/
1570 int parse_arguments(int *argc_p, const char ***argv_p)
1571 {
1572         static poptContext pc;
1573         const char *arg, **argv = *argv_p;
1574         int argc = *argc_p;
1575         int opt, want_dest_type;
1576         int orig_protect_args = protect_args;
1577
1578         if (argc == 0) {
1579                 strlcpy(err_buf, "argc is zero!\n", sizeof err_buf);
1580                 return 0;
1581         }
1582
1583         set_refuse_options();
1584
1585 #ifdef ICONV_OPTION
1586         if (!am_daemon && protect_args <= 0 && (arg = getenv("RSYNC_ICONV")) != NULL && *arg)
1587                 iconv_opt = strdup(arg);
1588 #endif
1589
1590         /* TODO: Call poptReadDefaultConfig; handle errors. */
1591
1592         /* The context leaks in case of an error, but if there's a
1593          * problem we always exit anyhow. */
1594         if (pc)
1595                 poptFreeContext(pc);
1596         pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1597         if (!am_server) {
1598                 poptReadDefaultConfig(pc, 0);
1599                 popt_unalias(pc, "--daemon");
1600                 popt_unalias(pc, "--server");
1601         }
1602
1603         while ((opt = poptGetNextOpt(pc)) != -1) {
1604                 /* most options are handled automatically by popt;
1605                  * only special cases are returned and listed here. */
1606
1607                 switch (opt) {
1608                 case 'V':
1609                         version_opt_cnt++;
1610                         break;
1611
1612                 case OPT_SERVER:
1613                         if (!am_server) {
1614                                 /* Disable popt aliases on the server side and
1615                                  * then start parsing the options again. */
1616                                 poptFreeContext(pc);
1617                                 pc = poptGetContext(RSYNC_NAME, argc, argv, long_options, 0);
1618                                 am_server = 1;
1619                         }
1620 #ifdef ICONV_OPTION
1621                         iconv_opt = NULL;
1622 #endif
1623                         break;
1624
1625                 case OPT_SENDER:
1626                         if (!am_server) {
1627                                 usage(FERROR);
1628                                 exit_cleanup(RERR_SYNTAX);
1629                         }
1630                         am_sender = 1;
1631                         break;
1632
1633                 case OPT_DAEMON:
1634                         if (am_daemon) {
1635                                 strlcpy(err_buf,
1636                                         "Attempt to hack rsync thwarted!\n",
1637                                         sizeof err_buf);
1638                                 return 0;
1639                         }
1640 #ifdef ICONV_OPTION
1641                         iconv_opt = NULL;
1642 #endif
1643                         protect_args = 0;
1644                         poptFreeContext(pc);
1645                         pc = poptGetContext(RSYNC_NAME, argc, argv, long_daemon_options, 0);
1646                         while ((opt = poptGetNextOpt(pc)) != -1) {
1647                                 char **cpp;
1648                                 switch (opt) {
1649                                 case 'h':
1650                                         daemon_usage(FINFO);
1651                                         exit_cleanup(0);
1652
1653                                 case 'M':
1654                                         arg = poptGetOptArg(pc);
1655                                         if (!strchr(arg, '=')) {
1656                                                 rprintf(FERROR,
1657                                                         "--dparam value is missing an '=': %s\n",
1658                                                         arg);
1659                                                 goto daemon_error;
1660                                         }
1661                                         cpp = EXPAND_ITEM_LIST(&dparam_list, char *, 4);
1662                                         *cpp = strdup(arg);
1663                                         break;
1664
1665                                 case 'v':
1666                                         verbose++;
1667                                         break;
1668
1669                                 default:
1670                                         rprintf(FERROR,
1671                                                 "rsync: %s: %s (in daemon mode)\n",
1672                                                 poptBadOption(pc, POPT_BADOPTION_NOALIAS),
1673                                                 poptStrerror(opt));
1674                                         goto daemon_error;
1675                                 }
1676                         }
1677
1678                         if (dparam_list.count && !set_dparams(1))
1679                                 exit_cleanup(RERR_SYNTAX);
1680
1681                         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
1682                                 snprintf(err_buf, sizeof err_buf,
1683                                          "the --temp-dir path is WAY too long.\n");
1684                                 return 0;
1685                         }
1686
1687                         if (!daemon_opt) {
1688                                 rprintf(FERROR, "Daemon option(s) used without --daemon.\n");
1689                             daemon_error:
1690                                 rprintf(FERROR, "(Type \"rsync --daemon --help\" for assistance with daemon mode.)\n");
1691                                 exit_cleanup(RERR_SYNTAX);
1692                         }
1693
1694                         *argv_p = argv = poptGetArgs(pc);
1695                         *argc_p = argc = count_args(argv);
1696                         am_starting_up = 0;
1697                         daemon_opt = 0;
1698                         am_daemon = 1;
1699                         return 1;
1700
1701                 case OPT_MODIFY_WINDOW:
1702                         /* The value has already been set by popt, but
1703                          * we need to remember that we're using a
1704                          * non-default setting. */
1705                         modify_window_set = 1;
1706                         break;
1707
1708                 case OPT_FILTER:
1709                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1710                                         rule_template(0), 0);
1711                         break;
1712
1713                 case OPT_EXCLUDE:
1714                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1715                                         rule_template(0), XFLG_OLD_PREFIXES);
1716                         break;
1717
1718                 case OPT_INCLUDE:
1719                         parse_filter_str(&filter_list, poptGetOptArg(pc),
1720                                         rule_template(FILTRULE_INCLUDE), XFLG_OLD_PREFIXES);
1721                         break;
1722
1723                 case OPT_EXCLUDE_FROM:
1724                 case OPT_INCLUDE_FROM:
1725                         arg = poptGetOptArg(pc);
1726                         if (sanitize_paths)
1727                                 arg = sanitize_path(NULL, arg, NULL, 0, SP_DEFAULT);
1728                         if (daemon_filter_list.head) {
1729                                 int rej;
1730                                 char *cp = strdup(arg);
1731                                 if (!*cp)
1732                                         rej = 1;
1733                                 else {
1734                                         char *dir = cp + (*cp == '/' ? module_dirlen : 0);
1735                                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
1736                                         rej = check_filter(&daemon_filter_list, FLOG, dir, 0) < 0;
1737                                 }
1738                                 free(cp);
1739                                 if (rej)
1740                                         goto options_rejected;
1741                         }
1742                         parse_filter_file(&filter_list, arg,
1743                                 rule_template(opt == OPT_INCLUDE_FROM ? FILTRULE_INCLUDE : 0),
1744                                 XFLG_FATAL_ERRORS | XFLG_OLD_PREFIXES);
1745                         break;
1746
1747                 case 'a':
1748                         if (refused_archive_part) {
1749                                 create_refuse_error(refused_archive_part);
1750                                 return 0;
1751                         }
1752                         if (!recurse) /* preserve recurse == 2 */
1753                                 recurse = 1;
1754 #ifdef SUPPORT_LINKS
1755                         preserve_links = 1;
1756 #endif
1757                         preserve_perms = 1;
1758                         preserve_times = 1;
1759                         preserve_gid = 1;
1760                         preserve_uid = 1;
1761                         preserve_devices = 1;
1762                         preserve_specials = 1;
1763                         break;
1764
1765                 case 'D':
1766                         preserve_devices = preserve_specials = 1;
1767                         break;
1768
1769                 case OPT_NO_D:
1770                         preserve_devices = preserve_specials = 0;
1771                         break;
1772
1773                 case 'h':
1774                         human_readable++;
1775                         break;
1776
1777                 case 'H':
1778                         preserve_hard_links++;
1779                         break;
1780
1781                 case 'i':
1782                         itemize_changes++;
1783                         break;
1784
1785                 case 'U':
1786                         if (++preserve_atimes > 1)
1787                                 open_noatime = 1;
1788                         break;
1789
1790                 case 'v':
1791                         verbose++;
1792                         break;
1793
1794                 case 'y':
1795                         fuzzy_basis++;
1796                         break;
1797
1798                 case 'q':
1799                         quiet++;
1800                         break;
1801
1802                 case 'x':
1803                         one_file_system++;
1804                         break;
1805
1806                 case 'F':
1807                         switch (++F_option_cnt) {
1808                         case 1:
1809                                 parse_filter_str(&filter_list,": /.rsync-filter",rule_template(0),0);
1810                                 break;
1811                         case 2:
1812                                 parse_filter_str(&filter_list,"- .rsync-filter",rule_template(0),0);
1813                                 break;
1814                         }
1815                         break;
1816
1817                 case 'P':
1818                         if (refused_partial || refused_progress) {
1819                                 create_refuse_error(refused_partial ? refused_partial : refused_progress);
1820                                 return 0;
1821                         }
1822                         do_progress = 1;
1823                         keep_partial = 1;
1824                         break;
1825
1826                 case 'z':
1827                         do_compression++;
1828                         break;
1829
1830                 case OPT_OLD_COMPRESS:
1831                         compress_choice = "zlib";
1832                         break;
1833
1834                 case OPT_NEW_COMPRESS:
1835                         compress_choice = "zlibx";
1836                         break;
1837
1838                 case OPT_NO_COMPRESS:
1839                         do_compression = 0;
1840                         compress_choice = NULL;
1841                         break;
1842
1843                 case 'M':
1844                         arg = poptGetOptArg(pc);
1845                         if (*arg != '-') {
1846                                 snprintf(err_buf, sizeof err_buf,
1847                                         "Remote option must start with a dash: %s\n", arg);
1848                                 return 0;
1849                         }
1850                         if (remote_option_cnt+2 >= remote_option_alloc) {
1851                                 remote_option_alloc += 16;
1852                                 remote_options = realloc_array(remote_options,
1853                                                         const char *, remote_option_alloc);
1854                                 if (!remote_option_cnt)
1855                                         remote_options[0] = "ARG0";
1856                         }
1857                         remote_options[++remote_option_cnt] = arg;
1858                         remote_options[remote_option_cnt+1] = NULL;
1859                         break;
1860
1861                 case OPT_WRITE_BATCH:
1862                         /* batch_name is already set */
1863                         write_batch = 1;
1864                         break;
1865
1866                 case OPT_ONLY_WRITE_BATCH:
1867                         /* batch_name is already set */
1868                         write_batch = -1;
1869                         break;
1870
1871                 case OPT_READ_BATCH:
1872                         /* batch_name is already set */
1873                         read_batch = 1;
1874                         break;
1875
1876                 case OPT_NO_ICONV:
1877 #ifdef ICONV_OPTION
1878                         iconv_opt = NULL;
1879 #endif
1880                         break;
1881
1882                 case OPT_BLOCK_SIZE: {
1883                         /* We may not know the real protocol_version at this point if this is the client
1884                          * option parsing, but we still want to check it so that the client can specify
1885                          * a --protocol=29 option with a larger block size. */
1886                         int max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
1887                         ssize_t size;
1888                         arg = poptGetOptArg(pc);
1889                         if ((size = parse_size_arg(arg, 'b', "block-size", 0, max_blength, False)) < 0)
1890                                 return 0;
1891                         block_size = (int32)size;
1892                         break;
1893                 }
1894
1895                 case OPT_MAX_SIZE:
1896                         if ((max_size = parse_size_arg(max_size_arg, 'b', "max-size", 0, -1, False)) < 0)
1897                                 return 0;
1898                         max_size_arg = strdup(do_big_num(max_size, 0, NULL));
1899                         break;
1900
1901                 case OPT_MIN_SIZE:
1902                         if ((min_size = parse_size_arg(min_size_arg, 'b', "min-size", 0, -1, False)) < 0)
1903                                 return 0;
1904                         min_size_arg = strdup(do_big_num(min_size, 0, NULL));
1905                         break;
1906
1907                 case OPT_BWLIMIT: {
1908                         ssize_t size = parse_size_arg(bwlimit_arg, 'K', "bwlimit", 512, -1, True);
1909                         if (size < 0)
1910                                 return 0;
1911                         bwlimit_arg = strdup(do_big_num(size, 0, NULL));
1912                         bwlimit = (size + 512) / 1024;
1913                         break;
1914                 }
1915
1916                 case OPT_APPEND:
1917                         if (am_server)
1918                                 append_mode++;
1919                         else
1920                                 append_mode = 1;
1921                         break;
1922
1923                 case OPT_LINK_DEST:
1924                         want_dest_type = LINK_DEST;
1925                         goto set_dest_dir;
1926
1927                 case OPT_COPY_DEST:
1928                         want_dest_type = COPY_DEST;
1929                         goto set_dest_dir;
1930
1931                 case OPT_COMPARE_DEST:
1932                         want_dest_type = COMPARE_DEST;
1933
1934                 set_dest_dir:
1935                         if (alt_dest_type && alt_dest_type != want_dest_type) {
1936                                 snprintf(err_buf, sizeof err_buf,
1937                                         "ERROR: the %s option conflicts with the %s option\n",
1938                                         alt_dest_opt(want_dest_type), alt_dest_opt(0));
1939                                 return 0;
1940                         }
1941                         alt_dest_type = want_dest_type;
1942
1943                         if (basis_dir_cnt >= MAX_BASIS_DIRS) {
1944                                 snprintf(err_buf, sizeof err_buf,
1945                                         "ERROR: at most %d %s args may be specified\n",
1946                                         MAX_BASIS_DIRS, alt_dest_opt(0));
1947                                 return 0;
1948                         }
1949                         /* We defer sanitizing this arg until we know what
1950                          * our destination directory is going to be. */
1951                         basis_dir[basis_dir_cnt++] = (char *)poptGetOptArg(pc);
1952                         break;
1953
1954                 case OPT_CHMOD:
1955                         arg = poptGetOptArg(pc);
1956                         if (!parse_chmod(arg, &chmod_modes)) {
1957                                 snprintf(err_buf, sizeof err_buf,
1958                                         "Invalid argument passed to --chmod (%s)\n",
1959                                         arg);
1960                                 return 0;
1961                         }
1962                         break;
1963
1964                 case OPT_INFO:
1965                         arg = poptGetOptArg(pc);
1966                         parse_output_words(info_words, info_levels, arg, USER_PRIORITY);
1967                         break;
1968
1969                 case OPT_DEBUG:
1970                         arg = poptGetOptArg(pc);
1971                         parse_output_words(debug_words, debug_levels, arg, USER_PRIORITY);
1972                         break;
1973
1974                 case OPT_USERMAP:
1975                         if (usermap) {
1976                                 if (usermap_via_chown) {
1977                                         snprintf(err_buf, sizeof err_buf,
1978                                                 "--usermap conflicts with prior --chown.\n");
1979                                         return 0;
1980                                 }
1981                                 snprintf(err_buf, sizeof err_buf,
1982                                         "You can only specify --usermap once.\n");
1983                                 return 0;
1984                         }
1985                         usermap = (char *)poptGetOptArg(pc);
1986                         usermap_via_chown = False;
1987                         break;
1988
1989                 case OPT_GROUPMAP:
1990                         if (groupmap) {
1991                                 if (groupmap_via_chown) {
1992                                         snprintf(err_buf, sizeof err_buf,
1993                                                 "--groupmap conflicts with prior --chown.\n");
1994                                         return 0;
1995                                 }
1996                                 snprintf(err_buf, sizeof err_buf,
1997                                         "You can only specify --groupmap once.\n");
1998                                 return 0;
1999                         }
2000                         groupmap = (char *)poptGetOptArg(pc);
2001                         groupmap_via_chown = False;
2002                         break;
2003
2004                 case OPT_CHOWN: {
2005                         const char *chown = poptGetOptArg(pc);
2006                         int len;
2007                         if ((arg = strchr(chown, ':')) != NULL)
2008                                 len = arg++ - chown;
2009                         else
2010                                 len = strlen(chown);
2011                         if (len) {
2012                                 if (usermap) {
2013                                         if (!usermap_via_chown) {
2014                                                 snprintf(err_buf, sizeof err_buf,
2015                                                         "--chown conflicts with prior --usermap.\n");
2016                                                 return 0;
2017                                         }
2018                                         snprintf(err_buf, sizeof err_buf,
2019                                                 "You can only specify a user-affecting --chown once.\n");
2020                                         return 0;
2021                                 }
2022                                 if (asprintf(&usermap, "*:%.*s", len, chown) < 0)
2023                                         out_of_memory("parse_arguments");
2024                                 usermap_via_chown = True;
2025                         }
2026                         if (arg && *arg) {
2027                                 if (groupmap) {
2028                                         if (!groupmap_via_chown) {
2029                                                 snprintf(err_buf, sizeof err_buf,
2030                                                         "--chown conflicts with prior --groupmap.\n");
2031                                                 return 0;
2032                                         }
2033                                         snprintf(err_buf, sizeof err_buf,
2034                                                 "You can only specify a group-affecting --chown once.\n");
2035                                         return 0;
2036                                 }
2037                                 if (asprintf(&groupmap, "*:%s", arg) < 0)
2038                                         out_of_memory("parse_arguments");
2039                                 groupmap_via_chown = True;
2040                         }
2041                         break;
2042                 }
2043
2044                 case OPT_HELP:
2045                         usage(FINFO);
2046                         exit_cleanup(0);
2047
2048                 case 'A':
2049 #ifdef SUPPORT_ACLS
2050                         preserve_acls = 1;
2051                         preserve_perms = 1;
2052                         break;
2053 #else
2054                         /* FIXME: this should probably be ignored with a
2055                          * warning and then countermeasures taken to
2056                          * restrict group and other access in the presence
2057                          * of any more restrictive ACLs, but this is safe
2058                          * for now */
2059                         snprintf(err_buf,sizeof(err_buf),
2060                                  "ACLs are not supported on this %s\n",
2061                                  am_server ? "server" : "client");
2062                         return 0;
2063 #endif
2064
2065                 case 'X':
2066 #ifdef SUPPORT_XATTRS
2067                         preserve_xattrs++;
2068                         break;
2069 #else
2070                         snprintf(err_buf,sizeof(err_buf),
2071                                  "extended attributes are not supported on this %s\n",
2072                                  am_server ? "server" : "client");
2073                         return 0;
2074 #endif
2075
2076                 case OPT_STOP_AFTER: {
2077                         long val;
2078                         arg = poptGetOptArg(pc);
2079                         stop_at_utime = time(NULL);
2080                         if ((val = atol(arg) * 60) <= 0 || LONG_MAX - val < stop_at_utime || (long)(time_t)val != val) {
2081                                 snprintf(err_buf, sizeof err_buf, "invalid --stop-after value: %s\n", arg);
2082                                 return 0;
2083                         }
2084                         stop_at_utime += val;
2085                         break;
2086                 }
2087
2088 #ifdef HAVE_MKTIME
2089                 case OPT_STOP_AT:
2090                         arg = poptGetOptArg(pc);
2091                         if ((stop_at_utime = parse_time(arg)) == (time_t)-1) {
2092                                 snprintf(err_buf, sizeof err_buf, "invalid --stop-at format: %s\n", arg);
2093                                 return 0;
2094                         }
2095                         if (stop_at_utime <= time(NULL)) {
2096                                 snprintf(err_buf, sizeof err_buf, "--stop-at time is not in the future: %s\n", arg);
2097                                 return 0;
2098                         }
2099                         break;
2100 #endif
2101
2102                 case OPT_STDERR: {
2103                         int len;
2104                         arg = poptGetOptArg(pc);
2105                         len = strlen(arg);
2106                         if (len && strncmp("errors", arg, len) == 0)
2107                                 msgs2stderr = 2;
2108                         else if (len && strncmp("all", arg, len) == 0)
2109                                 msgs2stderr = 1;
2110                         else if (len && strncmp("client", arg, len) == 0)
2111                                 msgs2stderr = 0;
2112                         else {
2113                                 snprintf(err_buf, sizeof err_buf,
2114                                         "--stderr mode \"%s\" is not one of errors, all, or client\n", arg);
2115                                 return 0;
2116                         }
2117                         break;
2118                 }
2119
2120                 default:
2121                         /* A large opt value means that set_refuse_options()
2122                          * turned this option off. */
2123                         if (opt >= OPT_REFUSED_BASE) {
2124                                 create_refuse_error(opt);
2125                                 return 0;
2126                         }
2127                         snprintf(err_buf, sizeof err_buf, "%s%s: %s\n",
2128                                  am_server ? "on remote machine: " : "",
2129                                  poptBadOption(pc, POPT_BADOPTION_NOALIAS),
2130                                  poptStrerror(opt));
2131                         return 0;
2132                 }
2133         }
2134
2135         if (version_opt_cnt) {
2136                 print_rsync_version(FINFO);
2137                 exit_cleanup(0);
2138         }
2139
2140         if (!max_alloc_arg) {
2141                 max_alloc_arg = getenv("RSYNC_MAX_ALLOC");
2142                 if (max_alloc_arg && !*max_alloc_arg)
2143                         max_alloc_arg = NULL;
2144         }
2145         if (max_alloc_arg) {
2146                 ssize_t size = parse_size_arg(max_alloc_arg, 'B', "max-alloc", 1024*1024, -1, True);
2147                 if (size < 0)
2148                         return 0;
2149                 max_alloc = size;
2150         }
2151
2152         if (protect_args < 0) {
2153                 if (am_server)
2154                         protect_args = 0;
2155                 else if ((arg = getenv("RSYNC_PROTECT_ARGS")) != NULL && *arg)
2156                         protect_args = atoi(arg) ? 1 : 0;
2157                 else {
2158 #ifdef RSYNC_USE_PROTECTED_ARGS
2159                         protect_args = 1;
2160 #else
2161                         protect_args = 0;
2162 #endif
2163                 }
2164         }
2165
2166         if (checksum_choice && strcasecmp(checksum_choice, "auto") != 0 && strcasecmp(checksum_choice, "auto,auto") != 0) {
2167                 /* Call this early to verify the args and figure out if we need to force
2168                  * --whole-file. Note that the parse function will get called again later,
2169                  * just in case an "auto" choice needs to know the protocol_version. */
2170                 parse_checksum_choice(0);
2171         } else
2172                 checksum_choice = NULL;
2173
2174         if (human_readable > 1 && argc == 2 && !am_server) {
2175                 /* Allow the old meaning of 'h' (--help) on its own. */
2176                 usage(FINFO);
2177                 exit_cleanup(0);
2178         }
2179
2180         if (!compress_choice && do_compression > 1)
2181                 compress_choice = "zlibx";
2182         if (compress_choice && strcasecmp(compress_choice, "auto") != 0)
2183                 parse_compress_choice(0); /* Twiddles do_compression and can possibly NULL-out compress_choice. */
2184         else
2185                 compress_choice = NULL;
2186
2187         if (do_compression || do_compression_level != CLVL_NOT_SPECIFIED) {
2188                 if (!do_compression)
2189                         do_compression = CPRES_AUTO;
2190                 if (do_compression && refused_compress) {
2191                         create_refuse_error(refused_compress);
2192                         return 0;
2193                 }
2194         }
2195
2196 #ifdef HAVE_SETVBUF
2197         if (outbuf_mode && !am_server) {
2198                 int mode = *(uchar *)outbuf_mode;
2199                 if (islower(mode))
2200                         mode = toupper(mode);
2201                 fflush(stdout); /* Just in case... */
2202                 switch (mode) {
2203                 case 'N': /* None */
2204                 case 'U': /* Unbuffered */
2205                         mode = _IONBF;
2206                         break;
2207                 case 'L': /* Line */
2208                         mode = _IOLBF;
2209                         break;
2210                 case 'B': /* Block */
2211                 case 'F': /* Full */
2212                         mode = _IOFBF;
2213                         break;
2214                 default:
2215                         snprintf(err_buf, sizeof err_buf,
2216                                 "Invalid --outbuf setting -- specify N, L, or B.\n");
2217                         return 0;
2218                 }
2219                 setvbuf(stdout, (char *)NULL, mode, 0);
2220         }
2221
2222         if (msgs2stderr == 1) { /* Are all messages going to stderr? */
2223                 /* Make stderr line buffered for better sharing of the stream. */
2224                 fflush(stderr); /* Just in case... */
2225                 setvbuf(stderr, (char *)NULL, _IOLBF, 0);
2226         }
2227 #endif
2228
2229         set_output_verbosity(verbose, DEFAULT_PRIORITY);
2230
2231         if (do_stats) {
2232                 parse_output_words(info_words, info_levels,
2233                         verbose > 1 ? "stats3" : "stats2", DEFAULT_PRIORITY);
2234         }
2235
2236 #ifdef ICONV_OPTION
2237         if (iconv_opt && protect_args != 2) {
2238                 if (!am_server && strcmp(iconv_opt, "-") == 0)
2239                         iconv_opt = NULL;
2240                 else
2241                         need_unsorted_flist = 1;
2242         }
2243         if (refused_no_iconv && !iconv_opt) {
2244                 create_refuse_error(refused_no_iconv);
2245                 return 0;
2246         }
2247 #endif
2248
2249         if (fuzzy_basis > 1)
2250                 fuzzy_basis = basis_dir_cnt + 1;
2251
2252         /* Don't let the client reset protect_args if it was already processed */
2253         if (orig_protect_args == 2 && am_server)
2254                 protect_args = orig_protect_args;
2255
2256         if (protect_args == 1 && am_server)
2257                 return 1;
2258
2259         *argv_p = argv = poptGetArgs(pc);
2260         *argc_p = argc = count_args(argv);
2261
2262 #ifndef SUPPORT_LINKS
2263         if (preserve_links && !am_sender) {
2264                 snprintf(err_buf, sizeof err_buf,
2265                          "symlinks are not supported on this %s\n",
2266                          am_server ? "server" : "client");
2267                 return 0;
2268         }
2269 #endif
2270
2271 #ifndef SUPPORT_HARD_LINKS
2272         if (preserve_hard_links) {
2273                 snprintf(err_buf, sizeof err_buf,
2274                          "hard links are not supported on this %s\n",
2275                          am_server ? "server" : "client");
2276                 return 0;
2277         }
2278 #endif
2279
2280 #ifdef SUPPORT_XATTRS
2281         if (am_root < 0 && preserve_xattrs > 1) {
2282                 snprintf(err_buf, sizeof err_buf,
2283                          "--fake-super conflicts with -XX\n");
2284                 return 0;
2285         }
2286 #else
2287         if (am_root < 0) {
2288                 snprintf(err_buf, sizeof err_buf,
2289                          "--fake-super requires an rsync with extended attributes enabled\n");
2290                 return 0;
2291         }
2292 #endif
2293
2294         if (write_batch && read_batch) {
2295                 snprintf(err_buf, sizeof err_buf,
2296                         "--write-batch and --read-batch can not be used together\n");
2297                 return 0;
2298         }
2299         if (write_batch > 0 || read_batch) {
2300                 if (am_server) {
2301                         rprintf(FINFO,
2302                                 "ignoring --%s-batch option sent to server\n",
2303                                 write_batch ? "write" : "read");
2304                         /* We don't actually exit_cleanup(), so that we can
2305                          * still service older version clients that still send
2306                          * batch args to server. */
2307                         read_batch = write_batch = 0;
2308                         batch_name = NULL;
2309                 } else if (dry_run)
2310                         write_batch = 0;
2311         } else if (write_batch < 0 && dry_run)
2312                 write_batch = 0;
2313         if (read_batch && files_from) {
2314                 snprintf(err_buf, sizeof err_buf,
2315                         "--read-batch cannot be used with --files-from\n");
2316                 return 0;
2317         }
2318         if (read_batch && remove_source_files) {
2319                 snprintf(err_buf, sizeof err_buf,
2320                         "--read-batch cannot be used with --remove-%s-files\n",
2321                         remove_source_files == 1 ? "source" : "sent");
2322                 return 0;
2323         }
2324         if (batch_name && strlen(batch_name) > MAX_BATCH_NAME_LEN) {
2325                 snprintf(err_buf, sizeof err_buf,
2326                         "the batch-file name must be %d characters or less.\n",
2327                         MAX_BATCH_NAME_LEN);
2328                 return 0;
2329         }
2330
2331         if (tmpdir && strlen(tmpdir) >= MAXPATHLEN - 10) {
2332                 snprintf(err_buf, sizeof err_buf,
2333                          "the --temp-dir path is WAY too long.\n");
2334                 return 0;
2335         }
2336
2337         if (max_delete < 0 && max_delete != INT_MIN) {
2338                 /* Negative numbers are treated as "no deletions". */
2339                 max_delete = 0;
2340         }
2341
2342         if (files_from) {
2343                 if (recurse == 1) /* preserve recurse == 2 */
2344                         recurse = 0;
2345                 if (xfer_dirs < 0)
2346                         xfer_dirs = 1;
2347         }
2348
2349         if (argc < 2 && !read_batch && !am_server)
2350                 list_only |= 1;
2351
2352         if (xfer_dirs >= 4) {
2353                 parse_filter_str(&filter_list, "- /*/*", rule_template(0), 0);
2354                 recurse = xfer_dirs = 1;
2355         } else if (recurse)
2356                 xfer_dirs = 1;
2357         else if (xfer_dirs < 0)
2358                 xfer_dirs = list_only ? 1 : 0;
2359
2360         if (relative_paths < 0)
2361                 relative_paths = files_from? 1 : 0;
2362         if (!relative_paths)
2363                 implied_dirs = 0;
2364
2365         if (delete_before + !!delete_during + delete_after > 1) {
2366                 snprintf(err_buf, sizeof err_buf,
2367                         "You may not combine multiple --delete-WHEN options.\n");
2368                 return 0;
2369         }
2370         if (delete_before || delete_during || delete_after)
2371                 delete_mode = 1;
2372         else if (delete_mode || delete_excluded) {
2373                 /* Only choose now between before & during if one is refused. */
2374                 if (refused_delete_before) {
2375                         if (!refused_delete_during)
2376                                 delete_during = 1;
2377                         else {
2378                                 create_refuse_error(refused_delete_before);
2379                                 return 0;
2380                         }
2381                 } else if (refused_delete_during)
2382                         delete_before = 1;
2383                 delete_mode = 1;
2384         }
2385         if (!xfer_dirs && delete_mode) {
2386                 snprintf(err_buf, sizeof err_buf,
2387                         "--delete does not work without --recursive (-r) or --dirs (-d).\n");
2388                 return 0;
2389         }
2390
2391         if (missing_args == 3) /* simplify if both options were specified */
2392                 missing_args = 2;
2393         if (refused_delete && (delete_mode || missing_args == 2)) {
2394                 create_refuse_error(refused_delete);
2395                 return 0;
2396         }
2397
2398         if (remove_source_files) {
2399                 /* We only want to infer this refusal of --remove-source-files
2400                  * via the refusal of "delete", not any of the "delete-FOO"
2401                  * options. */
2402                 if (refused_delete && am_sender) {
2403                         create_refuse_error(refused_delete);
2404                         return 0;
2405                 }
2406                 need_messages_from_generator = 1;
2407         }
2408
2409         if (munge_symlinks && !am_daemon) {
2410                 STRUCT_STAT st;
2411                 char prefix[SYMLINK_PREFIX_LEN]; /* NOT +1 ! */
2412                 strlcpy(prefix, SYMLINK_PREFIX, sizeof prefix); /* trim the trailing slash */
2413                 if (do_stat(prefix, &st) == 0 && S_ISDIR(st.st_mode)) {
2414                         rprintf(FERROR, "Symlink munging is unsafe when a %s directory exists.\n",
2415                                 prefix);
2416                         exit_cleanup(RERR_UNSUPPORTED);
2417                 }
2418         }
2419
2420         if (sanitize_paths) {
2421                 int i;
2422                 for (i = argc; i-- > 0; )
2423                         argv[i] = sanitize_path(NULL, argv[i], "", 0, SP_KEEP_DOT_DIRS);
2424                 if (tmpdir)
2425                         tmpdir = sanitize_path(NULL, tmpdir, NULL, 0, SP_DEFAULT);
2426                 if (backup_dir)
2427                         backup_dir = sanitize_path(NULL, backup_dir, NULL, 0, SP_DEFAULT);
2428         }
2429         if (daemon_filter_list.head && !am_sender) {
2430                 filter_rule_list *elp = &daemon_filter_list;
2431                 if (tmpdir) {
2432                         char *dir;
2433                         if (!*tmpdir)
2434                                 goto options_rejected;
2435                         dir = tmpdir + (*tmpdir == '/' ? module_dirlen : 0);
2436                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2437                         if (check_filter(elp, FLOG, dir, 1) < 0)
2438                                 goto options_rejected;
2439                 }
2440                 if (backup_dir) {
2441                         char *dir;
2442                         if (!*backup_dir)
2443                                 goto options_rejected;
2444                         dir = backup_dir + (*backup_dir == '/' ? module_dirlen : 0);
2445                         clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2446                         if (check_filter(elp, FLOG, dir, 1) < 0)
2447                                 goto options_rejected;
2448                 }
2449         }
2450
2451         if (!backup_suffix)
2452                 backup_suffix = backup_dir ? "" : BACKUP_SUFFIX;
2453         backup_suffix_len = strlen(backup_suffix);
2454         if (strchr(backup_suffix, '/') != NULL) {
2455                 snprintf(err_buf, sizeof err_buf,
2456                         "--suffix cannot contain slashes: %s\n",
2457                         backup_suffix);
2458                 return 0;
2459         }
2460         if (backup_dir) {
2461                 size_t len;
2462                 make_backups = 1; /* --backup-dir implies --backup */
2463                 while (*backup_dir == '.' && backup_dir[1] == '/')
2464                         backup_dir += 2;
2465                 if (*backup_dir == '.' && backup_dir[1] == '\0')
2466                         backup_dir++;
2467                 len = strlcpy(backup_dir_buf, backup_dir, sizeof backup_dir_buf);
2468                 if (len > sizeof backup_dir_buf - 128) {
2469                         snprintf(err_buf, sizeof err_buf,
2470                                 "the --backup-dir path is WAY too long.\n");
2471                         return 0;
2472                 }
2473                 backup_dir_len = (int)len;
2474                 if (!backup_dir_len) {
2475                         backup_dir_len = -1;
2476                         backup_dir = NULL;
2477                 } else if (backup_dir_buf[backup_dir_len - 1] != '/') {
2478                         backup_dir_buf[backup_dir_len++] = '/';
2479                         backup_dir_buf[backup_dir_len] = '\0';
2480                 }
2481                 backup_dir_remainder = sizeof backup_dir_buf - backup_dir_len;
2482         }
2483         if (backup_dir) {
2484                 /* No need for a suffix or a protect rule. */
2485         } else if (!backup_suffix_len && (!am_server || !am_sender)) {
2486                 snprintf(err_buf, sizeof err_buf,
2487                         "--suffix cannot be empty %s\n", backup_dir_len < 0
2488                         ? "when --backup-dir is the same as the dest dir"
2489                         : "without a --backup-dir");
2490                 return 0;
2491         } else if (make_backups && delete_mode && !delete_excluded && !am_server) {
2492                 snprintf(backup_dir_buf, sizeof backup_dir_buf,
2493                         "P *%s", backup_suffix);
2494                 parse_filter_str(&filter_list, backup_dir_buf, rule_template(0), 0);
2495         }
2496
2497         if (preserve_times) {
2498                 preserve_times = PRESERVE_FILE_TIMES;
2499                 if (!omit_dir_times)
2500                         preserve_times |= PRESERVE_DIR_TIMES;
2501 #ifdef CAN_SET_SYMLINK_TIMES
2502                 if (!omit_link_times)
2503                         preserve_times |= PRESERVE_LINK_TIMES;
2504 #endif
2505         }
2506
2507         if (make_backups && !backup_dir) {
2508                 omit_dir_times = 0; /* Implied, so avoid -O to sender. */
2509                 preserve_times &= ~PRESERVE_DIR_TIMES;
2510         }
2511
2512         if (stdout_format) {
2513                 if (am_server && log_format_has(stdout_format, 'I'))
2514                         stdout_format_has_i = 2;
2515                 else if (log_format_has(stdout_format, 'i'))
2516                         stdout_format_has_i = itemize_changes | 1;
2517                 if (!log_format_has(stdout_format, 'b')
2518                  && !log_format_has(stdout_format, 'c')
2519                  && !log_format_has(stdout_format, 'C'))
2520                         log_before_transfer = !am_server;
2521         } else if (itemize_changes) {
2522                 stdout_format = "%i %n%L";
2523                 stdout_format_has_i = itemize_changes;
2524                 log_before_transfer = !am_server;
2525         }
2526
2527         if (do_progress && !am_server) {
2528                 if (!log_before_transfer && INFO_EQ(NAME, 0))
2529                         parse_output_words(info_words, info_levels, "name", DEFAULT_PRIORITY);
2530                 parse_output_words(info_words, info_levels, "flist2,progress", DEFAULT_PRIORITY);
2531         }
2532
2533         if (dry_run)
2534                 do_xfers = 0;
2535
2536         set_io_timeout(io_timeout);
2537
2538         if (INFO_GTE(NAME, 1) && !stdout_format) {
2539                 stdout_format = "%n%L";
2540                 log_before_transfer = !am_server;
2541         }
2542         if (stdout_format_has_i || log_format_has(stdout_format, 'o'))
2543                 stdout_format_has_o_or_i = 1;
2544
2545         if (logfile_name && !am_daemon) {
2546                 if (!logfile_format) {
2547                         logfile_format = "%i %n%L";
2548                         logfile_format_has_i = logfile_format_has_o_or_i = 1;
2549                 } else {
2550                         if (log_format_has(logfile_format, 'i'))
2551                                 logfile_format_has_i = 1;
2552                         if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
2553                                 logfile_format_has_o_or_i = 1;
2554                 }
2555                 log_init(0);
2556         } else if (!am_daemon)
2557                 logfile_format = NULL;
2558
2559         if (daemon_bwlimit && (!bwlimit || bwlimit > daemon_bwlimit))
2560                 bwlimit = daemon_bwlimit;
2561         if (bwlimit) {
2562                 bwlimit_writemax = (size_t)bwlimit * 128;
2563                 if (bwlimit_writemax < 512)
2564                         bwlimit_writemax = 512;
2565         }
2566
2567         if (append_mode) {
2568                 if (whole_file > 0) {
2569                         snprintf(err_buf, sizeof err_buf,
2570                                  "--append cannot be used with --whole-file\n");
2571                         return 0;
2572                 }
2573                 if (refused_inplace) {
2574                         create_refuse_error(refused_inplace);
2575                         return 0;
2576                 }
2577                 inplace = 1;
2578         }
2579
2580         if (write_devices) {
2581                 if (refused_inplace) {
2582                         create_refuse_error(refused_inplace);
2583                         return 0;
2584                 }
2585                 inplace = 1;
2586         }
2587
2588         if (delay_updates && !partial_dir)
2589                 partial_dir = tmp_partialdir;
2590
2591         if (inplace) {
2592 #ifdef HAVE_FTRUNCATE
2593                 if (partial_dir) {
2594                         snprintf(err_buf, sizeof err_buf,
2595                                  "--%s cannot be used with --%s\n",
2596                                  append_mode ? "append" : "inplace",
2597                                  delay_updates ? "delay-updates" : "partial-dir");
2598                         return 0;
2599                 }
2600                 /* --inplace implies --partial for refusal purposes, but we
2601                  * clear the keep_partial flag for internal logic purposes. */
2602                 if (refused_partial) {
2603                         create_refuse_error(refused_partial);
2604                         return 0;
2605                 }
2606                 keep_partial = 0;
2607 #else
2608                 snprintf(err_buf, sizeof err_buf,
2609                          "--%s is not supported on this %s\n",
2610                          append_mode ? "append" : "inplace",
2611                          am_server ? "server" : "client");
2612                 return 0;
2613 #endif
2614         } else {
2615                 if (keep_partial && !partial_dir && !am_server) {
2616                         if ((arg = getenv("RSYNC_PARTIAL_DIR")) != NULL && *arg)
2617                                 partial_dir = strdup(arg);
2618                 }
2619                 if (partial_dir) {
2620                         if (*partial_dir)
2621                                 clean_fname(partial_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2622                         if (!*partial_dir || strcmp(partial_dir, ".") == 0)
2623                                 partial_dir = NULL;
2624                         if (!partial_dir && refused_partial) {
2625                                 create_refuse_error(refused_partial);
2626                                 return 0;
2627                         }
2628                         keep_partial = 1;
2629                 }
2630         }
2631
2632         if (files_from) {
2633                 char *h, *p;
2634                 int q;
2635                 if (argc > 2 || (!am_daemon && !am_server && argc == 1)) {
2636                         usage(FERROR);
2637                         exit_cleanup(RERR_SYNTAX);
2638                 }
2639                 if (strcmp(files_from, "-") == 0) {
2640                         filesfrom_fd = 0;
2641                         if (am_server)
2642                                 filesfrom_host = ""; /* reading from socket */
2643                 } else if ((p = check_for_hostspec(files_from, &h, &q)) != 0) {
2644                         if (am_server) {
2645                                 snprintf(err_buf, sizeof err_buf,
2646                                         "The --files-from sent to the server cannot specify a host.\n");
2647                                 return 0;
2648                         }
2649                         files_from = p;
2650                         filesfrom_host = h;
2651                         if (strcmp(files_from, "-") == 0) {
2652                                 snprintf(err_buf, sizeof err_buf,
2653                                         "Invalid --files-from remote filename\n");
2654                                 return 0;
2655                         }
2656                 } else {
2657                         if (sanitize_paths)
2658                                 files_from = sanitize_path(NULL, files_from, NULL, 0, SP_DEFAULT);
2659                         if (daemon_filter_list.head) {
2660                                 char *dir;
2661                                 if (!*files_from)
2662                                         goto options_rejected;
2663                                 dir = files_from + (*files_from == '/' ? module_dirlen : 0);
2664                                 clean_fname(dir, CFN_COLLAPSE_DOT_DOT_DIRS);
2665                                 if (check_filter(&daemon_filter_list, FLOG, dir, 0) < 0)
2666                                         goto options_rejected;
2667                         }
2668                         filesfrom_fd = open(files_from, O_RDONLY|O_BINARY);
2669                         if (filesfrom_fd < 0) {
2670                                 snprintf(err_buf, sizeof err_buf,
2671                                         "failed to open files-from file %s: %s\n",
2672                                         files_from, strerror(errno));
2673                                 return 0;
2674                         }
2675                 }
2676         }
2677
2678         am_starting_up = 0;
2679
2680         return 1;
2681
2682   options_rejected:
2683         snprintf(err_buf, sizeof err_buf,
2684                 "Your options have been rejected by the server.\n");
2685         return 0;
2686 }
2687
2688
2689 /**
2690  * Construct a filtered list of options to pass through from the
2691  * client to the server.
2692  *
2693  * This involves setting options that will tell the server how to
2694  * behave, and also filtering out options that are processed only
2695  * locally.
2696  **/
2697 void server_options(char **args, int *argc_p)
2698 {
2699         static char argstr[64];
2700         int ac = *argc_p;
2701         uchar where;
2702         char *arg;
2703         int i, x;
2704
2705         /* This should always remain first on the server's command-line. */
2706         args[ac++] = "--server";
2707
2708         if (!am_sender)
2709                 args[ac++] = "--sender";
2710
2711         x = 1;
2712         argstr[0] = '-';
2713
2714         if (protect_args)
2715                 argstr[x++] = 's';
2716
2717         for (i = 0; i < verbose; i++)
2718                 argstr[x++] = 'v';
2719
2720         if (quiet && msgs2stderr)
2721                 argstr[x++] = 'q';
2722         if (make_backups)
2723                 argstr[x++] = 'b';
2724         if (update_only)
2725                 argstr[x++] = 'u';
2726         if (!do_xfers) /* Note: NOT "dry_run"! */
2727                 argstr[x++] = 'n';
2728         if (preserve_links)
2729                 argstr[x++] = 'l';
2730         if ((xfer_dirs >= 2 && xfer_dirs < 4)
2731          || (xfer_dirs && !recurse && (list_only || (delete_mode && am_sender))))
2732                 argstr[x++] = 'd';
2733         if (am_sender) {
2734                 if (keep_dirlinks)
2735                         argstr[x++] = 'K';
2736                 if (prune_empty_dirs)
2737                         argstr[x++] = 'm';
2738                 if (omit_dir_times)
2739                         argstr[x++] = 'O';
2740                 if (omit_link_times)
2741                         argstr[x++] = 'J';
2742                 if (fuzzy_basis) {
2743                         argstr[x++] = 'y';
2744                         if (fuzzy_basis > 1)
2745                                 argstr[x++] = 'y';
2746                 }
2747         } else {
2748                 if (copy_links)
2749                         argstr[x++] = 'L';
2750                 if (copy_dirlinks)
2751                         argstr[x++] = 'k';
2752         }
2753
2754         if (whole_file > 0)
2755                 argstr[x++] = 'W';
2756         /* We don't need to send --no-whole-file, because it's the
2757          * default for remote transfers, and in any case old versions
2758          * of rsync will not understand it. */
2759
2760         if (preserve_hard_links) {
2761                 argstr[x++] = 'H';
2762                 if (preserve_hard_links > 1)
2763                         argstr[x++] = 'H';
2764         }
2765         if (preserve_uid)
2766                 argstr[x++] = 'o';
2767         if (preserve_gid)
2768                 argstr[x++] = 'g';
2769         if (preserve_devices) /* ignore preserve_specials here */
2770                 argstr[x++] = 'D';
2771         if (preserve_times)
2772                 argstr[x++] = 't';
2773         if (preserve_atimes) {
2774                 argstr[x++] = 'U';
2775                 if (preserve_atimes > 1)
2776                         argstr[x++] = 'U';
2777         }
2778 #ifdef SUPPORT_CRTIMES
2779         if (preserve_crtimes)
2780                 argstr[x++] = 'N';
2781 #endif
2782         if (preserve_perms)
2783                 argstr[x++] = 'p';
2784         else if (preserve_executability && am_sender)
2785                 argstr[x++] = 'E';
2786 #ifdef SUPPORT_ACLS
2787         if (preserve_acls)
2788                 argstr[x++] = 'A';
2789 #endif
2790 #ifdef SUPPORT_XATTRS
2791         if (preserve_xattrs) {
2792                 argstr[x++] = 'X';
2793                 if (preserve_xattrs > 1)
2794                         argstr[x++] = 'X';
2795         }
2796 #endif
2797         if (recurse)
2798                 argstr[x++] = 'r';
2799         if (always_checksum)
2800                 argstr[x++] = 'c';
2801         if (cvs_exclude)
2802                 argstr[x++] = 'C';
2803         if (ignore_times)
2804                 argstr[x++] = 'I';
2805         if (relative_paths)
2806                 argstr[x++] = 'R';
2807         if (one_file_system) {
2808                 argstr[x++] = 'x';
2809                 if (one_file_system > 1)
2810                         argstr[x++] = 'x';
2811         }
2812         if (sparse_files)
2813                 argstr[x++] = 'S';
2814         if (do_compression == CPRES_ZLIB)
2815                 argstr[x++] = 'z';
2816
2817         set_allow_inc_recurse();
2818
2819         /* We don't really know the actual protocol_version at this point,
2820          * but checking the pre-negotiated value allows the user to use a
2821          * --protocol=29 override to avoid the use of this -eFLAGS opt. */
2822         if (protocol_version >= 30) {
2823                 /* Use "eFlags" alias so that cull_options doesn't think that these are no-arg option letters. */
2824 #define eFlags argstr
2825                 /* We make use of the -e option to let the server know about
2826                  * any pre-release protocol version && some behavior flags. */
2827                 eFlags[x++] = 'e';
2828 #if SUBPROTOCOL_VERSION != 0
2829                 if (protocol_version == PROTOCOL_VERSION) {
2830                         x += snprintf(argstr+x, sizeof argstr - x,
2831                                       "%d.%d",
2832                                       PROTOCOL_VERSION, SUBPROTOCOL_VERSION);
2833                 } else
2834 #endif
2835                         eFlags[x++] = '.';
2836                 if (allow_inc_recurse)
2837                         eFlags[x++] = 'i';
2838 #ifdef CAN_SET_SYMLINK_TIMES
2839                 eFlags[x++] = 'L'; /* symlink time-setting support */
2840 #endif
2841 #ifdef ICONV_OPTION
2842                 eFlags[x++] = 's'; /* symlink iconv translation support */
2843 #endif
2844                 eFlags[x++] = 'f'; /* flist I/O-error safety support */
2845                 eFlags[x++] = 'x'; /* xattr hardlink optimization not desired */
2846                 eFlags[x++] = 'C'; /* support checksum seed order fix */
2847                 eFlags[x++] = 'I'; /* support inplace_partial behavior */
2848                 eFlags[x++] = 'v'; /* use varint for flist & compat flags; negotiate checksum */
2849                 eFlags[x++] = 'u'; /* include name of uid 0 & gid 0 in the id map */
2850                 /* NOTE: Avoid using 'V' -- it was the high bit of a write_byte() that became write_varint(). */
2851 #undef eFlags
2852         }
2853
2854         if (x >= (int)sizeof argstr) { /* Not possible... */
2855                 rprintf(FERROR, "argstr overflow in server_options().\n");
2856                 exit_cleanup(RERR_MALLOC);
2857         }
2858
2859         argstr[x] = '\0';
2860
2861         if (x > 1)
2862                 args[ac++] = argstr;
2863
2864 #ifdef ICONV_OPTION
2865         if (iconv_opt) {
2866                 char *set = strchr(iconv_opt, ',');
2867                 if (set)
2868                         set++;
2869                 else
2870                         set = iconv_opt;
2871                 if (asprintf(&arg, "--iconv=%s", set) < 0)
2872                         goto oom;
2873                 args[ac++] = arg;
2874         }
2875 #endif
2876
2877         if (protect_args && !local_server) /* unprotected args stop here */
2878                 args[ac++] = NULL;
2879
2880         if (list_only > 1)
2881                 args[ac++] = "--list-only";
2882
2883         /* This makes sure that the remote rsync can handle deleting with -d
2884          * sans -r because the --no-r option was added at the same time. */
2885         if (xfer_dirs && !recurse && delete_mode && am_sender)
2886                 args[ac++] = "--no-r";
2887
2888         if (do_compression && do_compression_level != CLVL_NOT_SPECIFIED) {
2889                 if (asprintf(&arg, "--compress-level=%d", do_compression_level) < 0)
2890                         goto oom;
2891                 args[ac++] = arg;
2892         }
2893
2894         if (preserve_devices) {
2895                 /* Note: sending "--devices" would not be backward-compatible. */
2896                 if (!preserve_specials)
2897                         args[ac++] = "--no-specials"; /* -D is already set. */
2898         } else if (preserve_specials)
2899                 args[ac++] = "--specials";
2900
2901         /* The server side doesn't use our log-format, but in certain
2902          * circumstances they need to know a little about the option. */
2903         if (stdout_format && am_sender) {
2904                 /* Use --log-format, not --out-format, for compatibility. */
2905                 if (stdout_format_has_i > 1)
2906                         args[ac++] = "--log-format=%i%I";
2907                 else if (stdout_format_has_i)
2908                         args[ac++] = "--log-format=%i";
2909                 else if (stdout_format_has_o_or_i)
2910                         args[ac++] = "--log-format=%o";
2911                 else if (!verbose)
2912                         args[ac++] = "--log-format=X";
2913         }
2914
2915         if (msgs2stderr == 1)
2916                 args[ac++] = "--msgs2stderr";
2917         else if (msgs2stderr == 0)
2918                 args[ac++] = "--no-msgs2stderr";
2919
2920         if (block_size) {
2921                 if (asprintf(&arg, "-B%u", (int)block_size) < 0)
2922                         goto oom;
2923                 args[ac++] = arg;
2924         }
2925
2926         if (io_timeout) {
2927                 if (asprintf(&arg, "--timeout=%d", io_timeout) < 0)
2928                         goto oom;
2929                 args[ac++] = arg;
2930         }
2931
2932         if (bwlimit) {
2933                 if (asprintf(&arg, "--bwlimit=%d", bwlimit) < 0)
2934                         goto oom;
2935                 args[ac++] = arg;
2936         }
2937
2938         if (backup_dir) {
2939                 args[ac++] = "--backup-dir";
2940                 args[ac++] = backup_dir;
2941         }
2942
2943         /* Only send --suffix if it specifies a non-default value. */
2944         if (strcmp(backup_suffix, backup_dir ? "" : BACKUP_SUFFIX) != 0) {
2945                 /* We use the following syntax to avoid weirdness with '~'. */
2946                 if (asprintf(&arg, "--suffix=%s", backup_suffix) < 0)
2947                         goto oom;
2948                 args[ac++] = arg;
2949         }
2950
2951         if (checksum_choice) {
2952                 if (asprintf(&arg, "--checksum-choice=%s", checksum_choice) < 0)
2953                         goto oom;
2954                 args[ac++] = arg;
2955         }
2956
2957         if (do_compression == CPRES_ZLIBX)
2958                 args[ac++] = "--new-compress";
2959         else if (compress_choice && do_compression == CPRES_ZLIB)
2960                 args[ac++] = "--old-compress";
2961         else if (compress_choice) {
2962                 if (asprintf(&arg, "--compress-choice=%s", compress_choice) < 0)
2963                         goto oom;
2964                 args[ac++] = arg;
2965         }
2966
2967         if (am_sender) {
2968                 if (max_delete > 0) {
2969                         if (asprintf(&arg, "--max-delete=%d", max_delete) < 0)
2970                                 goto oom;
2971                         args[ac++] = arg;
2972                 } else if (max_delete == 0)
2973                         args[ac++] = "--max-delete=-1";
2974                 if (min_size >= 0) {
2975                         args[ac++] = "--min-size";
2976                         args[ac++] = min_size_arg;
2977                 }
2978                 if (max_size >= 0) {
2979                         args[ac++] = "--max-size";
2980                         args[ac++] = max_size_arg;
2981                 }
2982                 if (delete_before)
2983                         args[ac++] = "--delete-before";
2984                 else if (delete_during == 2)
2985                         args[ac++] = "--delete-delay";
2986                 else if (delete_during)
2987                         args[ac++] = "--delete-during";
2988                 else if (delete_after)
2989                         args[ac++] = "--delete-after";
2990                 else if (delete_mode && !delete_excluded)
2991                         args[ac++] = "--delete";
2992                 if (delete_excluded)
2993                         args[ac++] = "--delete-excluded";
2994                 if (force_delete)
2995                         args[ac++] = "--force";
2996                 if (write_batch < 0)
2997                         args[ac++] = "--only-write-batch=X";
2998                 if (am_root > 1)
2999                         args[ac++] = "--super";
3000                 if (size_only)
3001                         args[ac++] = "--size-only";
3002                 if (do_stats)
3003                         args[ac++] = "--stats";
3004         } else {
3005                 if (skip_compress) {
3006                         if (asprintf(&arg, "--skip-compress=%s", skip_compress) < 0)
3007                                 goto oom;
3008                         args[ac++] = arg;
3009                 }
3010         }
3011
3012         if (max_alloc_arg && max_alloc != DEFAULT_MAX_ALLOC) {
3013                 args[ac++] = "--max-alloc";
3014                 args[ac++] = max_alloc_arg;
3015         }
3016
3017         /* --delete-missing-args needs the cooperation of both sides, but
3018          * the sender can handle --ignore-missing-args by itself. */
3019         if (missing_args == 2)
3020                 args[ac++] = "--delete-missing-args";
3021         else if (missing_args == 1 && !am_sender)
3022                 args[ac++] = "--ignore-missing-args";
3023
3024         if (modify_window_set && am_sender) {
3025                 char *fmt = modify_window < 0 ? "-@%d" : "--modify-window=%d";
3026                 if (asprintf(&arg, fmt, modify_window) < 0)
3027                         goto oom;
3028                 args[ac++] = arg;
3029         }
3030
3031         if (checksum_seed) {
3032                 if (asprintf(&arg, "--checksum-seed=%d", checksum_seed) < 0)
3033                         goto oom;
3034                 args[ac++] = arg;
3035         }
3036
3037         if (partial_dir && am_sender) {
3038                 if (partial_dir != tmp_partialdir) {
3039                         args[ac++] = "--partial-dir";
3040                         args[ac++] = partial_dir;
3041                 }
3042                 if (delay_updates)
3043                         args[ac++] = "--delay-updates";
3044         } else if (keep_partial && am_sender)
3045                 args[ac++] = "--partial";
3046
3047         if (ignore_errors)
3048                 args[ac++] = "--ignore-errors";
3049
3050         if (copy_unsafe_links)
3051                 args[ac++] = "--copy-unsafe-links";
3052
3053         if (safe_symlinks)
3054                 args[ac++] = "--safe-links";
3055
3056         if (numeric_ids)
3057                 args[ac++] = "--numeric-ids";
3058
3059         if (use_qsort)
3060                 args[ac++] = "--use-qsort";
3061
3062         if (am_sender) {
3063                 if (usermap) {
3064                         if (asprintf(&arg, "--usermap=%s", usermap) < 0)
3065                                 goto oom;
3066                         args[ac++] = arg;
3067                 }
3068
3069                 if (groupmap) {
3070                         if (asprintf(&arg, "--groupmap=%s", groupmap) < 0)
3071                                 goto oom;
3072                         args[ac++] = arg;
3073                 }
3074
3075                 if (ignore_existing)
3076                         args[ac++] = "--ignore-existing";
3077
3078                 /* Backward compatibility: send --existing, not --ignore-non-existing. */
3079                 if (ignore_non_existing)
3080                         args[ac++] = "--existing";
3081
3082                 if (tmpdir) {
3083                         args[ac++] = "--temp-dir";
3084                         args[ac++] = tmpdir;
3085                 }
3086
3087                 if (basis_dir[0]) {
3088                         /* the server only needs this option if it is not the sender,
3089                          *   and it may be an older version that doesn't know this
3090                          *   option, so don't send it if client is the sender.
3091                          */
3092                         for (i = 0; i < basis_dir_cnt; i++) {
3093                                 args[ac++] = alt_dest_opt(0);
3094                                 args[ac++] = basis_dir[i];
3095                         }
3096                 }
3097         }
3098
3099         /* What flags do we need to send to the other side? */
3100         where = (am_server ? W_CLI : W_SRV) | (am_sender ? W_REC : W_SND);
3101         arg = make_output_option(info_words, info_levels, where);
3102         if (arg)
3103                 args[ac++] = arg;
3104
3105         if (append_mode) {
3106                 if (append_mode > 1)
3107                         args[ac++] = "--append";
3108                 args[ac++] = "--append";
3109         } else if (inplace)
3110                 args[ac++] = "--inplace";
3111
3112         if (files_from && (!am_sender || filesfrom_host)) {
3113                 if (filesfrom_host) {
3114                         args[ac++] = "--files-from";
3115                         args[ac++] = files_from;
3116                         if (eol_nulls)
3117                                 args[ac++] = "--from0";
3118                 } else {
3119                         args[ac++] = "--files-from=-";
3120                         args[ac++] = "--from0";
3121                 }
3122                 if (!relative_paths)
3123                         args[ac++] = "--no-relative";
3124         }
3125         /* It's OK that this checks the upper-bound of the protocol_version. */
3126         if (relative_paths && !implied_dirs && (!am_sender || protocol_version >= 30))
3127                 args[ac++] = "--no-implied-dirs";
3128
3129         if (write_devices && am_sender)
3130                 args[ac++] = "--write-devices";
3131
3132         if (remove_source_files == 1)
3133                 args[ac++] = "--remove-source-files";
3134         else if (remove_source_files)
3135                 args[ac++] = "--remove-sent-files";
3136
3137         if (preallocate_files && am_sender)
3138                 args[ac++] = "--preallocate";
3139
3140         if (open_noatime && preserve_atimes <= 1)
3141                 args[ac++] = "--open-noatime";
3142
3143         if (mkpath_dest_arg && am_sender)
3144                 args[ac++] = "--mkpath";
3145
3146         if (ac > MAX_SERVER_ARGS) { /* Not possible... */
3147                 rprintf(FERROR, "argc overflow in server_options().\n");
3148                 exit_cleanup(RERR_MALLOC);
3149         }
3150
3151         if (remote_option_cnt) {
3152                 int j;
3153                 if (ac + remote_option_cnt > MAX_SERVER_ARGS) {
3154                         rprintf(FERROR, "too many remote options specified.\n");
3155                         exit_cleanup(RERR_SYNTAX);
3156                 }
3157                 for (j = 1; j <= remote_option_cnt; j++)
3158                         args[ac++] = (char*)remote_options[j];
3159         }
3160
3161         *argc_p = ac;
3162         return;
3163
3164     oom:
3165         out_of_memory("server_options");
3166 }
3167
3168 /* If str points to a valid hostspec, return allocated memory containing the
3169  * [USER@]HOST part of the string, and set the path_start_ptr to the part of
3170  * the string after the host part.  Otherwise, return NULL.  If port_ptr is
3171  * non-NULL, we must be parsing an rsync:// URL hostname, and we will set
3172  * *port_ptr if a port number is found.  Note that IPv6 IPs will have their
3173  * (required for parsing) [ and ] chars elided from the returned string. */
3174 static char *parse_hostspec(char *str, char **path_start_ptr, int *port_ptr)
3175 {
3176         char *s, *host_start = str;
3177         int hostlen = 0, userlen = 0;
3178         char *ret;
3179
3180         for (s = str; ; s++) {
3181                 if (!*s) {
3182                         /* It is only OK if we run out of string with rsync:// */
3183                         if (!port_ptr)
3184                                 return NULL;
3185                         if (!hostlen)
3186                                 hostlen = s - host_start;
3187                         break;
3188                 }
3189                 if (*s == ':' || *s == '/') {
3190                         if (!hostlen)
3191                                 hostlen = s - host_start;
3192                         if (*s++ == '/') {
3193                                 if (!port_ptr)
3194                                         return NULL;
3195                         } else if (port_ptr) {
3196                                 *port_ptr = atoi(s);
3197                                 while (isDigit(s)) s++;
3198                                 if (*s && *s++ != '/')
3199                                         return NULL;
3200                         }
3201                         break;
3202                 }
3203                 if (*s == '@') {
3204                         userlen = s - str + 1;
3205                         host_start = s + 1;
3206                 } else if (*s == '[') {
3207                         if (s != host_start++)
3208                                 return NULL;
3209                         while (*s && *s != ']' && *s != '/') s++; /*SHARED ITERATOR*/
3210                         hostlen = s - host_start;
3211                         if (*s != ']' || (s[1] && s[1] != '/' && s[1] != ':') || !hostlen)
3212                                 return NULL;
3213                 }
3214         }
3215
3216         *path_start_ptr = s;
3217         ret = new_array(char, userlen + hostlen + 1);
3218         if (userlen)
3219                 strlcpy(ret, str, userlen + 1);
3220         strlcpy(ret + userlen, host_start, hostlen + 1);
3221         return ret;
3222 }
3223
3224 /* Look for a HOST specification of the form "HOST:PATH", "HOST::PATH", or
3225  * "rsync://HOST:PORT/PATH".  If found, *host_ptr will be set to some allocated
3226  * memory with the HOST.  If a daemon-accessing spec was specified, the value
3227  * of *port_ptr will contain a non-0 port number, otherwise it will be set to
3228  * 0.  The return value is a pointer to the PATH.  Note that the HOST spec can
3229  * be an IPv6 literal address enclosed in '[' and ']' (such as "[::1]" or
3230  * "[::ffff:127.0.0.1]") which is returned without the '[' and ']'. */
3231 char *check_for_hostspec(char *s, char **host_ptr, int *port_ptr)
3232 {
3233         char *path;
3234
3235         if (port_ptr && strncasecmp(URL_PREFIX, s, strlen(URL_PREFIX)) == 0) {
3236                 *host_ptr = parse_hostspec(s + strlen(URL_PREFIX), &path, port_ptr);
3237                 if (*host_ptr) {
3238                         if (!*port_ptr)
3239                                 *port_ptr = -1; /* -1 indicates they want the default */
3240                         return path;
3241                 }
3242         }
3243
3244         *host_ptr = parse_hostspec(s, &path, NULL);
3245         if (!*host_ptr)
3246                 return NULL;
3247
3248         if (*path == ':') {
3249                 if (port_ptr && !*port_ptr)
3250                         *port_ptr = -1;
3251                 return path + 1;
3252         }
3253         if (port_ptr)
3254                 *port_ptr = 0;
3255
3256         return path;
3257 }