Commit | Line | Data |
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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 | |
d3d07a5e | 6 | * Copyright (C) 2004-2008 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; |
8a9709de | 27 | |
b9f592fb | 28 | extern int verbose; |
aae43eb3 | 29 | extern int am_server; |
771d0add | 30 | extern int am_sender; |
d0c59b0e | 31 | extern int local_server; |
57b12568 | 32 | extern int inplace; |
e4b619b4 | 33 | extern int recurse; |
c8e83946 | 34 | extern int use_qsort; |
5275029d | 35 | extern int allow_inc_recurse; |
77502cba | 36 | extern int append_mode; |
e461b9be | 37 | extern int fuzzy_basis; |
b9f592fb | 38 | extern int read_batch; |
e4b619b4 | 39 | extern int delay_updates; |
aae43eb3 | 40 | extern int checksum_seed; |
57b12568 | 41 | extern int basis_dir_cnt; |
a1cc199b | 42 | extern int prune_empty_dirs; |
8a9709de | 43 | extern int protocol_version; |
5688c74d | 44 | extern int protect_args; |
99a957d3 WD |
45 | extern int preserve_uid; |
46 | extern int preserve_gid; | |
1c3344a1 | 47 | extern int preserve_acls; |
16edf865 | 48 | extern int preserve_xattrs; |
e4b619b4 WD |
49 | extern int need_messages_from_generator; |
50 | extern int delete_mode, delete_before, delete_during, delete_after; | |
1ed56a05 | 51 | extern char *shell_cmd; |
c1289508 | 52 | extern char *partial_dir; |
57b12568 | 53 | extern char *dest_option; |
5688c74d WD |
54 | extern char *files_from; |
55 | extern char *filesfrom_host; | |
c1289508 | 56 | extern struct filter_list_struct filter_list; |
f7a76b9c | 57 | extern int need_unsorted_flist; |
5688c74d | 58 | #ifdef ICONV_OPTION |
5688c74d WD |
59 | extern iconv_t ic_send, ic_recv; |
60 | #endif | |
4fe159a8 | 61 | |
9742b386 | 62 | /* These index values are for the file-list's extra-attribute array. */ |
f7a76b9c | 63 | int uid_ndx, gid_ndx, acls_ndx, xattrs_ndx, unsort_ndx; |
5688c74d | 64 | |
1ed56a05 WD |
65 | int receiver_symlink_times = 0; /* receiver can set the time on a symlink */ |
66 | ||
f7a76b9c | 67 | #ifdef ICONV_OPTION |
5688c74d WD |
68 | int filesfrom_convert = 0; |
69 | #endif | |
9742b386 | 70 | |
1ed56a05 WD |
71 | #define CF_INC_RECURSE (1<<0) |
72 | #define CF_SYMLINK_TIMES (1<<1) | |
73 | ||
74 | static const char *client_info; | |
75 | ||
486f8cd1 WD |
76 | /* The server makes sure that if either side only supports a pre-release |
77 | * version of a protocol, that both sides must speak a compatible version | |
78 | * of that protocol for it to be advertised as available. */ | |
79 | static void check_sub_protocol(void) | |
80 | { | |
81 | char *dot; | |
82 | int their_protocol, their_sub; | |
ac593860 | 83 | #if SUBPROTOCOL_VERSION != 0 |
486f8cd1 | 84 | int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION; |
ac593860 WD |
85 | #else |
86 | int our_sub = 0; | |
87 | #endif | |
486f8cd1 | 88 | |
1ed56a05 WD |
89 | /* client_info starts with VER.SUB string if client is a pre-release. */ |
90 | if (!(their_protocol = atoi(client_info)) | |
91 | || !(dot = strchr(client_info, '.')) | |
486f8cd1 | 92 | || !(their_sub = atoi(dot+1))) { |
ac593860 | 93 | #if SUBPROTOCOL_VERSION != 0 |
486f8cd1 WD |
94 | if (our_sub) |
95 | protocol_version--; | |
ac593860 | 96 | #endif |
486f8cd1 WD |
97 | return; |
98 | } | |
99 | ||
100 | if (their_protocol < protocol_version) { | |
101 | if (their_sub) | |
102 | protocol_version = their_protocol - 1; | |
103 | return; | |
104 | } | |
105 | ||
106 | if (their_protocol > protocol_version) | |
ac593860 | 107 | their_sub = 0; /* 0 == final version of older protocol */ |
486f8cd1 WD |
108 | if (their_sub != our_sub) |
109 | protocol_version--; | |
110 | } | |
111 | ||
9970bed4 WD |
112 | void set_allow_inc_recurse(void) |
113 | { | |
1ed56a05 WD |
114 | client_info = shell_cmd ? shell_cmd : ""; |
115 | ||
aabb50d4 WD |
116 | if (!recurse || use_qsort) |
117 | allow_inc_recurse = 0; | |
118 | else if (!am_sender | |
119 | && (delete_before || delete_after | |
120 | || delay_updates || prune_empty_dirs)) | |
9970bed4 WD |
121 | allow_inc_recurse = 0; |
122 | else if (am_server && !local_server | |
1ed56a05 | 123 | && (strchr(client_info, 'i') == NULL)) |
9970bed4 WD |
124 | allow_inc_recurse = 0; |
125 | } | |
126 | ||
aae43eb3 | 127 | void setup_protocol(int f_out,int f_in) |
4fe159a8 | 128 | { |
6eee13cf | 129 | if (am_sender) |
bc5df0f4 | 130 | file_extra_cnt += PTR_EXTRA_CNT; |
6eee13cf | 131 | else |
99a957d3 | 132 | file_extra_cnt++; |
6eee13cf | 133 | if (preserve_uid) |
9742b386 | 134 | uid_ndx = ++file_extra_cnt; |
6eee13cf | 135 | if (preserve_gid) |
9742b386 | 136 | gid_ndx = ++file_extra_cnt; |
1c3344a1 | 137 | if (preserve_acls && !am_sender) |
9742b386 | 138 | acls_ndx = ++file_extra_cnt; |
16edf865 | 139 | if (preserve_xattrs) |
9742b386 | 140 | xattrs_ndx = ++file_extra_cnt; |
6eee13cf | 141 | |
9970bed4 WD |
142 | if (am_server) |
143 | set_allow_inc_recurse(); | |
144 | ||
8a9709de | 145 | if (remote_protocol == 0) { |
486f8cd1 WD |
146 | if (am_server && !local_server) |
147 | check_sub_protocol(); | |
aa434321 | 148 | if (!read_batch) |
8a9709de | 149 | write_int(f_out, protocol_version); |
aa434321 | 150 | remote_protocol = read_int(f_in); |
8a9709de WD |
151 | if (protocol_version > remote_protocol) |
152 | protocol_version = remote_protocol; | |
13c5fc0e | 153 | } |
b9f592fb | 154 | if (read_batch && remote_protocol > protocol_version) { |
486f8cd1 | 155 | rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n", |
b9f592fb WD |
156 | remote_protocol, protocol_version); |
157 | exit_cleanup(RERR_PROTOCOL); | |
158 | } | |
aae43eb3 | 159 | |
8a9709de WD |
160 | if (verbose > 3) { |
161 | rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n", | |
162 | am_server? "Server" : "Client", remote_protocol, protocol_version); | |
163 | } | |
164 | if (remote_protocol < MIN_PROTOCOL_VERSION | |
165 | || remote_protocol > MAX_PROTOCOL_VERSION) { | |
4ccfd96c | 166 | rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n"); |
d310a212 | 167 | rprintf(FERROR,"(see the rsync man page for an explanation)\n"); |
65417579 | 168 | exit_cleanup(RERR_PROTOCOL); |
8a9709de WD |
169 | } |
170 | if (remote_protocol < OLD_PROTOCOL_VERSION) { | |
1b2db7ae | 171 | rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n", |
8a9709de WD |
172 | am_server? "Client" : "Server"); |
173 | } | |
174 | if (protocol_version < MIN_PROTOCOL_VERSION) { | |
175 | rprintf(FERROR, "--protocol must be at least %d on the %s.\n", | |
176 | MIN_PROTOCOL_VERSION, am_server? "Server" : "Client"); | |
177 | exit_cleanup(RERR_PROTOCOL); | |
178 | } | |
179 | if (protocol_version > PROTOCOL_VERSION) { | |
180 | rprintf(FERROR, "--protocol must be no more than %d on the %s.\n", | |
181 | PROTOCOL_VERSION, am_server? "Server" : "Client"); | |
182 | exit_cleanup(RERR_PROTOCOL); | |
183 | } | |
a7c1fa00 WD |
184 | if (read_batch) |
185 | check_batch_flags(); | |
1b2db7ae | 186 | |
771d0add | 187 | if (protocol_version < 30) { |
77502cba WD |
188 | if (append_mode == 1) |
189 | append_mode = 2; | |
01894cf0 | 190 | if (preserve_acls && !local_server) { |
1c3344a1 WD |
191 | rprintf(FERROR, |
192 | "--acls requires protocol 30 or higher" | |
193 | " (negotiated %d).\n", | |
194 | protocol_version); | |
195 | exit_cleanup(RERR_PROTOCOL); | |
196 | } | |
01894cf0 | 197 | if (preserve_xattrs && !local_server) { |
16edf865 WD |
198 | rprintf(FERROR, |
199 | "--xattrs requires protocol 30 or higher" | |
200 | " (negotiated %d).\n", | |
201 | protocol_version); | |
202 | exit_cleanup(RERR_PROTOCOL); | |
203 | } | |
771d0add WD |
204 | } |
205 | ||
e4b619b4 WD |
206 | if (delete_mode && !(delete_before+delete_during+delete_after)) { |
207 | if (protocol_version < 30) | |
208 | delete_before = 1; | |
209 | else | |
210 | delete_during = 1; | |
211 | } | |
212 | ||
a1cc199b WD |
213 | if (protocol_version < 29) { |
214 | if (fuzzy_basis) { | |
215 | rprintf(FERROR, | |
216 | "--fuzzy requires protocol 29 or higher" | |
217 | " (negotiated %d).\n", | |
218 | protocol_version); | |
219 | exit_cleanup(RERR_PROTOCOL); | |
220 | } | |
e461b9be | 221 | |
a1cc199b WD |
222 | if (basis_dir_cnt && inplace) { |
223 | rprintf(FERROR, | |
224 | "%s with --inplace requires protocol 29 or higher" | |
225 | " (negotiated %d).\n", | |
226 | dest_option, protocol_version); | |
227 | exit_cleanup(RERR_PROTOCOL); | |
228 | } | |
57b12568 | 229 | |
a1cc199b WD |
230 | if (basis_dir_cnt > 1) { |
231 | rprintf(FERROR, | |
232 | "Using more than one %s option requires protocol" | |
233 | " 29 or higher (negotiated %d).\n", | |
234 | dest_option, protocol_version); | |
235 | exit_cleanup(RERR_PROTOCOL); | |
236 | } | |
237 | ||
238 | if (prune_empty_dirs) { | |
239 | rprintf(FERROR, | |
240 | "--prune-empty-dirs requires protocol 29 or higher" | |
241 | " (negotiated %d).\n", | |
242 | protocol_version); | |
243 | exit_cleanup(RERR_PROTOCOL); | |
244 | } | |
e4b619b4 | 245 | } else if (protocol_version >= 30) { |
1ed56a05 | 246 | int compat_flags; |
9970bed4 | 247 | if (am_server) { |
1ed56a05 WD |
248 | compat_flags = allow_inc_recurse ? CF_INC_RECURSE : 0; |
249 | #if defined HAVE_LUTIMES && defined HAVE_UTIMES | |
250 | compat_flags |= CF_SYMLINK_TIMES; | |
251 | #endif | |
252 | write_byte(f_out, compat_flags); | |
9970bed4 | 253 | } else |
1ed56a05 WD |
254 | compat_flags = read_byte(f_in); |
255 | /* The inc_recurse var MUST be set to 0 or 1. */ | |
256 | inc_recurse = compat_flags & CF_INC_RECURSE ? 1 : 0; | |
257 | if (am_sender) { | |
258 | receiver_symlink_times = am_server | |
259 | ? strchr(client_info, 'L') != NULL | |
260 | : !!(compat_flags & CF_SYMLINK_TIMES); | |
261 | } | |
262 | #if defined HAVE_LUTIMES && defined HAVE_UTIMES | |
263 | else | |
264 | receiver_symlink_times = 1; | |
265 | #endif | |
9970bed4 WD |
266 | if (inc_recurse && !allow_inc_recurse) { |
267 | /* This should only be able to happen in a batch. */ | |
268 | fprintf(stderr, | |
269 | "Incompatible options specified for inc-recursive %s.\n", | |
52d9a554 | 270 | read_batch ? "batch file" : "connection"); |
9970bed4 WD |
271 | exit_cleanup(RERR_SYNTAX); |
272 | } | |
e4b619b4 | 273 | need_messages_from_generator = 1; |
1ed9018e WD |
274 | #if defined HAVE_LUTIMES && defined HAVE_UTIMES |
275 | } else if (!am_sender) { | |
276 | receiver_symlink_times = 1; | |
277 | #endif | |
57b12568 WD |
278 | } |
279 | ||
f7a76b9c WD |
280 | if (need_unsorted_flist && (!am_sender || inc_recurse)) |
281 | unsort_ndx = ++file_extra_cnt; | |
7820fa94 | 282 | |
d0c59b0e | 283 | if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) { |
c1289508 WD |
284 | int flags = MATCHFLG_NO_PREFIXES | MATCHFLG_DIRECTORY; |
285 | if (!am_sender || protocol_version >= 30) | |
286 | flags |= MATCHFLG_PERISHABLE; | |
287 | parse_rule(&filter_list, partial_dir, flags, 0); | |
288 | } | |
289 | ||
5688c74d WD |
290 | |
291 | #ifdef ICONV_OPTION | |
292 | if (protect_args && files_from) { | |
293 | if (am_sender) | |
294 | filesfrom_convert = filesfrom_host && ic_send != (iconv_t)-1; | |
295 | else | |
296 | filesfrom_convert = !filesfrom_host && ic_recv != (iconv_t)-1; | |
297 | } | |
298 | #endif | |
299 | ||
bc63ae3f | 300 | if (am_server) { |
b1bf649c | 301 | if (!checksum_seed) |
13c5fc0e | 302 | checksum_seed = time(NULL); |
b1bf649c | 303 | write_int(f_out, checksum_seed); |
bc63ae3f S |
304 | } else { |
305 | checksum_seed = read_int(f_in); | |
13c5fc0e | 306 | } |
4fe159a8 | 307 | } |