Commit | Line | Data |
---|---|---|
0f78b815 | 1 | /* |
d1f83bcc | 2 | * Compatibility routines for older rsync protocol versions. |
0f78b815 WD |
3 | * |
4 | * Copyright (C) Andrew Tridgell 1996 | |
5 | * Copyright (C) Paul Mackerras 1996 | |
b3bf9b9d | 6 | * Copyright (C) 2004-2009 Wayne Davison |
0f78b815 WD |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
8e41b68e WD |
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. | |
0f78b815 WD |
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 | * | |
e7c67065 | 18 | * You should have received a copy of the GNU General Public License along |
4fd842f9 | 19 | * with this program; if not, visit the http://fsf.org website. |
0f78b815 | 20 | */ |
4fe159a8 AT |
21 | |
22 | #include "rsync.h" | |
23 | ||
8a9709de | 24 | int remote_protocol = 0; |
99a957d3 | 25 | int file_extra_cnt = 0; /* count of file-list extras that everyone gets */ |
3ea6e0e7 | 26 | int inc_recurse = 0; |
5d8dcd1e | 27 | int compat_flags = 0; |
de6ab501 | 28 | int use_safe_inc_flist = 0; |
8a9709de | 29 | |
aae43eb3 | 30 | extern int am_server; |
771d0add | 31 | extern int am_sender; |
d0c59b0e | 32 | extern int local_server; |
57b12568 | 33 | extern int inplace; |
e4b619b4 | 34 | extern int recurse; |
c8e83946 | 35 | extern int use_qsort; |
5275029d | 36 | extern int allow_inc_recurse; |
28b519c9 | 37 | extern int preallocate_files; |
77502cba | 38 | extern int append_mode; |
e461b9be | 39 | extern int fuzzy_basis; |
b9f592fb | 40 | extern int read_batch; |
e4b619b4 | 41 | extern int delay_updates; |
aae43eb3 | 42 | extern int checksum_seed; |
57b12568 | 43 | extern int basis_dir_cnt; |
a1cc199b | 44 | extern int prune_empty_dirs; |
8a9709de | 45 | extern int protocol_version; |
5688c74d | 46 | extern int protect_args; |
99a957d3 WD |
47 | extern int preserve_uid; |
48 | extern int preserve_gid; | |
1c3344a1 | 49 | extern int preserve_acls; |
16edf865 | 50 | extern int preserve_xattrs; |
e4b619b4 WD |
51 | extern int need_messages_from_generator; |
52 | extern int delete_mode, delete_before, delete_during, delete_after; | |
1ed56a05 | 53 | extern char *shell_cmd; |
c1289508 | 54 | extern char *partial_dir; |
57b12568 | 55 | extern char *dest_option; |
5688c74d WD |
56 | extern char *files_from; |
57 | extern char *filesfrom_host; | |
7b6c5c77 | 58 | extern filter_rule_list filter_list; |
f7a76b9c | 59 | extern int need_unsorted_flist; |
5688c74d | 60 | #ifdef ICONV_OPTION |
5688c74d | 61 | extern iconv_t ic_send, ic_recv; |
91fd15b8 | 62 | extern char *iconv_opt; |
5688c74d | 63 | #endif |
4fe159a8 | 64 | |
9742b386 | 65 | /* These index values are for the file-list's extra-attribute array. */ |
f7a76b9c | 66 | int uid_ndx, gid_ndx, acls_ndx, xattrs_ndx, unsort_ndx; |
5688c74d | 67 | |
1ed56a05 | 68 | int receiver_symlink_times = 0; /* receiver can set the time on a symlink */ |
91fd15b8 | 69 | int sender_symlink_iconv = 0; /* sender should convert symlink content */ |
1ed56a05 | 70 | |
f7a76b9c | 71 | #ifdef ICONV_OPTION |
5688c74d WD |
72 | int filesfrom_convert = 0; |
73 | #endif | |
9742b386 | 74 | |
1ed56a05 WD |
75 | #define CF_INC_RECURSE (1<<0) |
76 | #define CF_SYMLINK_TIMES (1<<1) | |
91fd15b8 | 77 | #define CF_SYMLINK_ICONV (1<<2) |
de6ab501 | 78 | #define CF_SAFE_FLIST (1<<3) |
1ed56a05 WD |
79 | |
80 | static const char *client_info; | |
81 | ||
486f8cd1 WD |
82 | /* The server makes sure that if either side only supports a pre-release |
83 | * version of a protocol, that both sides must speak a compatible version | |
84 | * of that protocol for it to be advertised as available. */ | |
85 | static void check_sub_protocol(void) | |
86 | { | |
87 | char *dot; | |
88 | int their_protocol, their_sub; | |
ac593860 | 89 | #if SUBPROTOCOL_VERSION != 0 |
486f8cd1 | 90 | int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION; |
ac593860 WD |
91 | #else |
92 | int our_sub = 0; | |
93 | #endif | |
486f8cd1 | 94 | |
1ed56a05 WD |
95 | /* client_info starts with VER.SUB string if client is a pre-release. */ |
96 | if (!(their_protocol = atoi(client_info)) | |
97 | || !(dot = strchr(client_info, '.')) | |
486f8cd1 | 98 | || !(their_sub = atoi(dot+1))) { |
ac593860 | 99 | #if SUBPROTOCOL_VERSION != 0 |
486f8cd1 WD |
100 | if (our_sub) |
101 | protocol_version--; | |
ac593860 | 102 | #endif |
486f8cd1 WD |
103 | return; |
104 | } | |
105 | ||
106 | if (their_protocol < protocol_version) { | |
107 | if (their_sub) | |
108 | protocol_version = their_protocol - 1; | |
109 | return; | |
110 | } | |
111 | ||
112 | if (their_protocol > protocol_version) | |
ac593860 | 113 | their_sub = 0; /* 0 == final version of older protocol */ |
486f8cd1 WD |
114 | if (their_sub != our_sub) |
115 | protocol_version--; | |
116 | } | |
117 | ||
9970bed4 WD |
118 | void set_allow_inc_recurse(void) |
119 | { | |
1ed56a05 WD |
120 | client_info = shell_cmd ? shell_cmd : ""; |
121 | ||
aabb50d4 WD |
122 | if (!recurse || use_qsort) |
123 | allow_inc_recurse = 0; | |
124 | else if (!am_sender | |
125 | && (delete_before || delete_after | |
126 | || delay_updates || prune_empty_dirs)) | |
9970bed4 WD |
127 | allow_inc_recurse = 0; |
128 | else if (am_server && !local_server | |
1ed56a05 | 129 | && (strchr(client_info, 'i') == NULL)) |
9970bed4 WD |
130 | allow_inc_recurse = 0; |
131 | } | |
132 | ||
aae43eb3 | 133 | void setup_protocol(int f_out,int f_in) |
4fe159a8 | 134 | { |
6eee13cf | 135 | if (am_sender) |
bc5df0f4 | 136 | file_extra_cnt += PTR_EXTRA_CNT; |
6eee13cf | 137 | else |
99a957d3 | 138 | file_extra_cnt++; |
6eee13cf | 139 | if (preserve_uid) |
9742b386 | 140 | uid_ndx = ++file_extra_cnt; |
6eee13cf | 141 | if (preserve_gid) |
9742b386 | 142 | gid_ndx = ++file_extra_cnt; |
1c3344a1 | 143 | if (preserve_acls && !am_sender) |
9742b386 | 144 | acls_ndx = ++file_extra_cnt; |
16edf865 | 145 | if (preserve_xattrs) |
9742b386 | 146 | xattrs_ndx = ++file_extra_cnt; |
6eee13cf | 147 | |
9970bed4 WD |
148 | if (am_server) |
149 | set_allow_inc_recurse(); | |
150 | ||
8a9709de | 151 | if (remote_protocol == 0) { |
486f8cd1 WD |
152 | if (am_server && !local_server) |
153 | check_sub_protocol(); | |
aa434321 | 154 | if (!read_batch) |
8a9709de | 155 | write_int(f_out, protocol_version); |
aa434321 | 156 | remote_protocol = read_int(f_in); |
8a9709de WD |
157 | if (protocol_version > remote_protocol) |
158 | protocol_version = remote_protocol; | |
13c5fc0e | 159 | } |
b9f592fb | 160 | if (read_batch && remote_protocol > protocol_version) { |
486f8cd1 | 161 | rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n", |
b9f592fb WD |
162 | remote_protocol, protocol_version); |
163 | exit_cleanup(RERR_PROTOCOL); | |
164 | } | |
aae43eb3 | 165 | |
951e826b | 166 | if (DEBUG_GTE(PROTO, 1)) { |
8a9709de WD |
167 | rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n", |
168 | am_server? "Server" : "Client", remote_protocol, protocol_version); | |
169 | } | |
170 | if (remote_protocol < MIN_PROTOCOL_VERSION | |
171 | || remote_protocol > MAX_PROTOCOL_VERSION) { | |
4ccfd96c | 172 | rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n"); |
d310a212 | 173 | rprintf(FERROR,"(see the rsync man page for an explanation)\n"); |
65417579 | 174 | exit_cleanup(RERR_PROTOCOL); |
8a9709de WD |
175 | } |
176 | if (remote_protocol < OLD_PROTOCOL_VERSION) { | |
1b2db7ae | 177 | rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n", |
8a9709de WD |
178 | am_server? "Client" : "Server"); |
179 | } | |
180 | if (protocol_version < MIN_PROTOCOL_VERSION) { | |
181 | rprintf(FERROR, "--protocol must be at least %d on the %s.\n", | |
182 | MIN_PROTOCOL_VERSION, am_server? "Server" : "Client"); | |
183 | exit_cleanup(RERR_PROTOCOL); | |
184 | } | |
185 | if (protocol_version > PROTOCOL_VERSION) { | |
186 | rprintf(FERROR, "--protocol must be no more than %d on the %s.\n", | |
187 | PROTOCOL_VERSION, am_server? "Server" : "Client"); | |
188 | exit_cleanup(RERR_PROTOCOL); | |
189 | } | |
a7c1fa00 WD |
190 | if (read_batch) |
191 | check_batch_flags(); | |
1b2db7ae | 192 | |
28b519c9 WD |
193 | #ifndef SUPPORT_PREALLOCATION |
194 | if (preallocate_files && !am_sender) { | |
195 | rprintf(FERROR, "preallocation is not supported on this %s\n", | |
196 | am_server ? "Server" : "Client"); | |
197 | exit_cleanup(RERR_SYNTAX); | |
198 | } | |
199 | #endif | |
200 | ||
771d0add | 201 | if (protocol_version < 30) { |
77502cba WD |
202 | if (append_mode == 1) |
203 | append_mode = 2; | |
01894cf0 | 204 | if (preserve_acls && !local_server) { |
1c3344a1 WD |
205 | rprintf(FERROR, |
206 | "--acls requires protocol 30 or higher" | |
207 | " (negotiated %d).\n", | |
208 | protocol_version); | |
209 | exit_cleanup(RERR_PROTOCOL); | |
210 | } | |
01894cf0 | 211 | if (preserve_xattrs && !local_server) { |
16edf865 WD |
212 | rprintf(FERROR, |
213 | "--xattrs requires protocol 30 or higher" | |
214 | " (negotiated %d).\n", | |
215 | protocol_version); | |
216 | exit_cleanup(RERR_PROTOCOL); | |
217 | } | |
771d0add WD |
218 | } |
219 | ||
e4b619b4 WD |
220 | if (delete_mode && !(delete_before+delete_during+delete_after)) { |
221 | if (protocol_version < 30) | |
222 | delete_before = 1; | |
223 | else | |
224 | delete_during = 1; | |
225 | } | |
226 | ||
a1cc199b WD |
227 | if (protocol_version < 29) { |
228 | if (fuzzy_basis) { | |
229 | rprintf(FERROR, | |
230 | "--fuzzy requires protocol 29 or higher" | |
231 | " (negotiated %d).\n", | |
232 | protocol_version); | |
233 | exit_cleanup(RERR_PROTOCOL); | |
234 | } | |
e461b9be | 235 | |
a1cc199b WD |
236 | if (basis_dir_cnt && inplace) { |
237 | rprintf(FERROR, | |
238 | "%s with --inplace requires protocol 29 or higher" | |
239 | " (negotiated %d).\n", | |
240 | dest_option, protocol_version); | |
241 | exit_cleanup(RERR_PROTOCOL); | |
242 | } | |
57b12568 | 243 | |
a1cc199b WD |
244 | if (basis_dir_cnt > 1) { |
245 | rprintf(FERROR, | |
246 | "Using more than one %s option requires protocol" | |
247 | " 29 or higher (negotiated %d).\n", | |
248 | dest_option, protocol_version); | |
249 | exit_cleanup(RERR_PROTOCOL); | |
250 | } | |
251 | ||
252 | if (prune_empty_dirs) { | |
253 | rprintf(FERROR, | |
254 | "--prune-empty-dirs requires protocol 29 or higher" | |
255 | " (negotiated %d).\n", | |
256 | protocol_version); | |
257 | exit_cleanup(RERR_PROTOCOL); | |
258 | } | |
e4b619b4 | 259 | } else if (protocol_version >= 30) { |
9970bed4 | 260 | if (am_server) { |
1ed56a05 | 261 | compat_flags = allow_inc_recurse ? CF_INC_RECURSE : 0; |
accc091f | 262 | #ifdef CAN_SET_SYMLINK_TIMES |
1ed56a05 | 263 | compat_flags |= CF_SYMLINK_TIMES; |
91fd15b8 WD |
264 | #endif |
265 | #ifdef ICONV_OPTION | |
266 | compat_flags |= CF_SYMLINK_ICONV; | |
1ed56a05 | 267 | #endif |
de6ab501 WD |
268 | if (local_server || strchr(client_info, 'f') != NULL) |
269 | compat_flags |= CF_SAFE_FLIST; | |
1ed56a05 | 270 | write_byte(f_out, compat_flags); |
de6ab501 | 271 | } else |
1ed56a05 WD |
272 | compat_flags = read_byte(f_in); |
273 | /* The inc_recurse var MUST be set to 0 or 1. */ | |
274 | inc_recurse = compat_flags & CF_INC_RECURSE ? 1 : 0; | |
275 | if (am_sender) { | |
276 | receiver_symlink_times = am_server | |
277 | ? strchr(client_info, 'L') != NULL | |
278 | : !!(compat_flags & CF_SYMLINK_TIMES); | |
279 | } | |
accc091f | 280 | #ifdef CAN_SET_SYMLINK_TIMES |
1ed56a05 WD |
281 | else |
282 | receiver_symlink_times = 1; | |
91fd15b8 WD |
283 | #endif |
284 | #ifdef ICONV_OPTION | |
285 | sender_symlink_iconv = iconv_opt && (am_server | |
eecc969e | 286 | ? local_server || strchr(client_info, 's') != NULL |
91fd15b8 | 287 | : !!(compat_flags & CF_SYMLINK_ICONV)); |
1ed56a05 | 288 | #endif |
9970bed4 WD |
289 | if (inc_recurse && !allow_inc_recurse) { |
290 | /* This should only be able to happen in a batch. */ | |
291 | fprintf(stderr, | |
292 | "Incompatible options specified for inc-recursive %s.\n", | |
52d9a554 | 293 | read_batch ? "batch file" : "connection"); |
9970bed4 WD |
294 | exit_cleanup(RERR_SYNTAX); |
295 | } | |
de6ab501 | 296 | use_safe_inc_flist = (compat_flags & CF_SAFE_FLIST) || protocol_version >= 31; |
e4b619b4 | 297 | need_messages_from_generator = 1; |
accc091f | 298 | #ifdef CAN_SET_SYMLINK_TIMES |
1ed9018e WD |
299 | } else if (!am_sender) { |
300 | receiver_symlink_times = 1; | |
301 | #endif | |
57b12568 WD |
302 | } |
303 | ||
f7a76b9c WD |
304 | if (need_unsorted_flist && (!am_sender || inc_recurse)) |
305 | unsort_ndx = ++file_extra_cnt; | |
7820fa94 | 306 | |
d0c59b0e | 307 | if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) { |
b32d4254 | 308 | int rflags = FILTRULE_NO_PREFIXES | FILTRULE_DIRECTORY; |
c1289508 | 309 | if (!am_sender || protocol_version >= 30) |
b32d4254 | 310 | rflags |= FILTRULE_PERISHABLE; |
c8fa85b2 | 311 | parse_filter_str(&filter_list, partial_dir, rule_template(rflags), 0); |
c1289508 WD |
312 | } |
313 | ||
5688c74d WD |
314 | |
315 | #ifdef ICONV_OPTION | |
316 | if (protect_args && files_from) { | |
317 | if (am_sender) | |
318 | filesfrom_convert = filesfrom_host && ic_send != (iconv_t)-1; | |
319 | else | |
320 | filesfrom_convert = !filesfrom_host && ic_recv != (iconv_t)-1; | |
321 | } | |
322 | #endif | |
323 | ||
bc63ae3f | 324 | if (am_server) { |
b1bf649c | 325 | if (!checksum_seed) |
13c5fc0e | 326 | checksum_seed = time(NULL); |
b1bf649c | 327 | write_int(f_out, checksum_seed); |
bc63ae3f S |
328 | } else { |
329 | checksum_seed = read_int(f_in); | |
13c5fc0e | 330 | } |
4fe159a8 | 331 | } |