Commit | Line | Data |
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7a2fd68b | 1 | /* |
c627d613 AT |
2 | Copyright (C) Andrew Tridgell 1996 |
3 | Copyright (C) Paul Mackerras 1996 | |
7a2fd68b | 4 | |
c627d613 AT |
5 | This program is free software; you can redistribute it and/or modify |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
7a2fd68b | 9 | |
c627d613 AT |
10 | This program is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
7a2fd68b | 14 | |
c627d613 AT |
15 | You should have received a copy of the GNU General Public License |
16 | along with this program; if not, write to the Free Software | |
17 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
18 | */ | |
19 | ||
2f03f956 AT |
20 | /* this file contains code used by more than one part of the rsync |
21 | process */ | |
c627d613 | 22 | |
2f03f956 | 23 | #include "rsync.h" |
43a481dc | 24 | |
c627d613 | 25 | extern int verbose; |
c627d613 | 26 | extern int dry_run; |
8324bd5c | 27 | extern int daemon_log_format_has_i; |
9b499e95 | 28 | extern int preserve_perms; |
81284832 | 29 | extern int preserve_executability; |
2f03f956 | 30 | extern int preserve_times; |
82471e68 | 31 | extern int omit_dir_times; |
81284832 | 32 | extern int orig_umask; |
7b8356d0 | 33 | extern int am_root; |
794b0a03 | 34 | extern int am_server; |
c3e5e585 WD |
35 | extern int am_sender; |
36 | extern int am_generator; | |
ed9d969c | 37 | extern int am_starting_up; |
2f03f956 AT |
38 | extern int preserve_uid; |
39 | extern int preserve_gid; | |
c786a7ae | 40 | extern int inplace; |
81b07870 | 41 | extern int keep_dirlinks; |
2f03f956 | 42 | extern int make_backups; |
c786a7ae | 43 | extern struct stats stats; |
fe055c71 AT |
44 | |
45 | ||
c627d613 AT |
46 | /* |
47 | free a sums struct | |
48 | */ | |
2f03f956 | 49 | void free_sums(struct sum_struct *s) |
c627d613 | 50 | { |
298c10d5 AT |
51 | if (s->sums) free(s->sums); |
52 | free(s); | |
c627d613 AT |
53 | } |
54 | ||
81284832 WD |
55 | /* This is only called when we aren't preserving permissions. Figure out what |
56 | * the permissions should be and return them merged back into the mode. */ | |
57 | mode_t dest_mode(mode_t flist_mode, mode_t dest_mode, int exists) | |
58 | { | |
9b499e95 | 59 | /* If the file already exists, we'll return the local permissions, |
81284832 WD |
60 | * possibly tweaked by the --executability option. */ |
61 | if (exists) { | |
62 | if (preserve_executability && S_ISREG(flist_mode)) { | |
63 | /* If the source file is executable, grant execute | |
64 | * rights to everyone who can read, but ONLY if the | |
65 | * file isn't already executable. */ | |
66 | if (!(flist_mode & 0111)) | |
67 | dest_mode &= ~0111; | |
68 | else if (!(dest_mode & 0111)) | |
69 | dest_mode |= (dest_mode & 0444) >> 2; | |
70 | } | |
71 | } else | |
9b499e95 | 72 | dest_mode = flist_mode & ACCESSPERMS & ~orig_umask; |
81284832 WD |
73 | return (flist_mode & ~CHMOD_BITS) | (dest_mode & CHMOD_BITS); |
74 | } | |
75 | ||
36119f6e WD |
76 | int set_file_attrs(char *fname, struct file_struct *file, STRUCT_STAT *st, |
77 | int flags) | |
c627d613 | 78 | { |
667e72a1 AT |
79 | int updated = 0; |
80 | STRUCT_STAT st2; | |
460f6b99 | 81 | int change_uid, change_gid; |
c627d613 | 82 | |
667e72a1 | 83 | if (!st) { |
f227ffe4 WD |
84 | if (dry_run) |
85 | return 1; | |
373ef160 | 86 | if (link_stat(fname, &st2, 0) < 0) { |
d62bcc17 WD |
87 | rsyserr(FERROR, errno, "stat %s failed", |
88 | full_fname(fname)); | |
667e72a1 AT |
89 | return 0; |
90 | } | |
91 | st = &st2; | |
9b499e95 WD |
92 | if (!preserve_perms && S_ISDIR(file->mode) |
93 | && st->st_mode & S_ISGID) { | |
94 | /* We just created this directory and its setgid | |
95 | * bit is on, so make sure it stays on. */ | |
96 | file->mode |= S_ISGID; | |
97 | } | |
667e72a1 | 98 | } |
c627d613 | 99 | |
c8d34657 | 100 | if (!preserve_times || (S_ISDIR(st->st_mode) && omit_dir_times)) |
36119f6e WD |
101 | flags |= ATTRS_SKIP_MTIME; |
102 | if (!(flags & ATTRS_SKIP_MTIME) | |
4ecc9e6b | 103 | && cmp_modtime(st->st_mtime, file->modtime) != 0) { |
c8d34657 WD |
104 | int ret = set_modtime(fname, file->modtime, st->st_mode); |
105 | if (ret < 0) { | |
d62bcc17 WD |
106 | rsyserr(FERROR, errno, "failed to set times on %s", |
107 | full_fname(fname)); | |
667e72a1 AT |
108 | return 0; |
109 | } | |
c8d34657 WD |
110 | if (ret == 0) /* ret == 1 if symlink could not be set */ |
111 | updated = 1; | |
667e72a1 AT |
112 | } |
113 | ||
7b6fa00f WD |
114 | change_uid = am_root && preserve_uid && st->st_uid != file->uid; |
115 | change_gid = preserve_gid && file->gid != GID_NONE | |
116 | && st->st_gid != file->gid; | |
4f5b0756 | 117 | #if !defined HAVE_LCHOWN && !defined CHOWN_MODIFIES_SYMLINK |
a41a1e87 WD |
118 | if (S_ISLNK(st->st_mode)) |
119 | ; | |
120 | else | |
121 | #endif | |
460f6b99 | 122 | if (change_uid || change_gid) { |
62c9e6b3 | 123 | if (verbose > 2) { |
ce37eb2d WD |
124 | if (change_uid) { |
125 | rprintf(FINFO, | |
4875d6b6 | 126 | "set uid of %s from %ld to %ld\n", |
45c49b52 | 127 | fname, |
7b6fa00f | 128 | (long)st->st_uid, (long)file->uid); |
ce37eb2d WD |
129 | } |
130 | if (change_gid) { | |
131 | rprintf(FINFO, | |
4875d6b6 | 132 | "set gid of %s from %ld to %ld\n", |
45c49b52 | 133 | fname, |
7b6fa00f | 134 | (long)st->st_gid, (long)file->gid); |
ce37eb2d WD |
135 | } |
136 | } | |
667e72a1 | 137 | if (do_lchown(fname, |
7b6fa00f WD |
138 | change_uid ? file->uid : st->st_uid, |
139 | change_gid ? file->gid : st->st_gid) != 0) { | |
460f6b99 | 140 | /* shouldn't have attempted to change uid or gid |
a174e1ed | 141 | * unless have the privilege */ |
d62bcc17 | 142 | rsyserr(FERROR, errno, "%s %s failed", |
a174e1ed | 143 | change_uid ? "chown" : "chgrp", |
d62bcc17 | 144 | full_fname(fname)); |
460f6b99 | 145 | return 0; |
667e72a1 | 146 | } |
a5827a28 | 147 | /* a lchown had been done - we have to re-stat if the |
dd096ae0 WD |
148 | * destination had the setuid or setgid bits set due |
149 | * to the side effect of the chown call */ | |
a5827a28 | 150 | if (st->st_mode & (S_ISUID | S_ISGID)) { |
81b07870 WD |
151 | link_stat(fname, st, |
152 | keep_dirlinks && S_ISDIR(st->st_mode)); | |
a5827a28 | 153 | } |
460f6b99 | 154 | updated = 1; |
667e72a1 | 155 | } |
c627d613 | 156 | |
4f5b0756 | 157 | #ifdef HAVE_CHMOD |
c8d34657 WD |
158 | if ((st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS)) { |
159 | int ret = do_chmod(fname, file->mode); | |
160 | if (ret < 0) { | |
161 | rsyserr(FERROR, errno, | |
162 | "failed to set permissions on %s", | |
163 | full_fname(fname)); | |
164 | return 0; | |
667e72a1 | 165 | } |
c8d34657 WD |
166 | if (ret == 0) /* ret == 1 if symlink could not be set */ |
167 | updated = 1; | |
667e72a1 | 168 | } |
c627d613 | 169 | #endif |
6a7cc46c | 170 | |
36119f6e | 171 | if (verbose > 1 && flags & ATTRS_REPORT) { |
8324bd5c WD |
172 | enum logcode code = daemon_log_format_has_i || dry_run |
173 | ? FCLIENT : FINFO; | |
667e72a1 | 174 | if (updated) |
45c49b52 | 175 | rprintf(code, "%s\n", fname); |
667e72a1 | 176 | else |
45c49b52 | 177 | rprintf(code, "%s is uptodate\n", fname); |
667e72a1 AT |
178 | } |
179 | return updated; | |
c627d613 AT |
180 | } |
181 | ||
b8e9c234 | 182 | RETSIGTYPE sig_int(UNUSED(int val)) |
34ccb63e | 183 | { |
d5a0b483 WD |
184 | /* KLUGE: if the user hits Ctrl-C while ssh is prompting |
185 | * for a password, then our cleanup's sending of a SIGUSR1 | |
186 | * signal to all our children may kill ssh before it has a | |
187 | * chance to restore the tty settings (i.e. turn echo back | |
188 | * on). By sleeping for a short time, ssh gets a bigger | |
189 | * chance to do the right thing. If child processes are | |
190 | * not ssh waiting for a password, then this tiny delay | |
191 | * shouldn't hurt anything. */ | |
192 | msleep(400); | |
65417579 | 193 | exit_cleanup(RERR_SIGNAL); |
c627d613 AT |
194 | } |
195 | ||
d8b1c923 WD |
196 | /* Finish off a file transfer: renaming the file and setting the file's |
197 | * attributes (e.g. permissions, ownership, etc.). If partialptr is not | |
198 | * NULL and the robust_rename() call is forced to copy the temp file, we | |
199 | * stage the file into the partial-dir and then rename it into place. */ | |
200 | void finish_transfer(char *fname, char *fnametmp, char *partialptr, | |
201 | struct file_struct *file, int ok_to_set_time, | |
202 | int overwriting_basis) | |
c95da96a | 203 | { |
62c9e6b3 WD |
204 | int ret; |
205 | ||
a3221d2a WD |
206 | if (inplace) { |
207 | if (verbose > 2) | |
45c49b52 | 208 | rprintf(FINFO, "finishing %s\n", fname); |
d8b1c923 | 209 | fnametmp = fname; |
36119f6e | 210 | goto do_set_file_attrs; |
a3221d2a WD |
211 | } |
212 | ||
997d9ea6 | 213 | if (make_backups && overwriting_basis && !make_backup(fname)) |
e484f0cc WD |
214 | return; |
215 | ||
ebeacb36 | 216 | /* Change permissions before putting the file into place. */ |
36119f6e WD |
217 | set_file_attrs(fnametmp, file, NULL, |
218 | ok_to_set_time ? 0 : ATTRS_SKIP_MTIME); | |
ebeacb36 | 219 | |
c95da96a | 220 | /* move tmp file over real file */ |
45c49b52 WD |
221 | if (verbose > 2) |
222 | rprintf(FINFO, "renaming %s to %s\n", fnametmp, fname); | |
d8b1c923 WD |
223 | ret = robust_rename(fnametmp, fname, partialptr, |
224 | file->mode & INITACCESSPERMS); | |
3d061653 | 225 | if (ret < 0) { |
d62bcc17 | 226 | rsyserr(FERROR, errno, "%s %s -> \"%s\"", |
45c49b52 WD |
227 | ret == -2 ? "copy" : "rename", |
228 | full_fname(fnametmp), fname); | |
c7c11a0d | 229 | do_unlink(fnametmp); |
077e59b7 | 230 | return; |
c95da96a | 231 | } |
ebeacb36 WD |
232 | if (ret == 0) { |
233 | /* The file was moved into place (not copied), so it's done. */ | |
234 | return; | |
235 | } | |
d8b1c923 WD |
236 | /* The file was copied, so tweak the perms of the copied file. If it |
237 | * was copied to partialptr, move it into its final destination. */ | |
238 | fnametmp = partialptr ? partialptr : fname; | |
239 | ||
36119f6e | 240 | do_set_file_attrs: |
d8b1c923 | 241 | set_file_attrs(fnametmp, file, NULL, |
36119f6e | 242 | ok_to_set_time ? 0 : ATTRS_SKIP_MTIME); |
d8b1c923 WD |
243 | |
244 | if (partialptr) { | |
245 | if (do_rename(fnametmp, fname) < 0) { | |
246 | rsyserr(FERROR, errno, "rename %s -> \"%s\"", | |
247 | full_fname(fnametmp), fname); | |
248 | } else | |
249 | handle_partial_dir(partialptr, PDIR_DELETE); | |
250 | } | |
c95da96a | 251 | } |
c3e5e585 WD |
252 | |
253 | const char *who_am_i(void) | |
254 | { | |
ed9d969c | 255 | if (am_starting_up) |
794b0a03 | 256 | return am_server ? "server" : "client"; |
ebeacb36 | 257 | return am_sender ? "sender" : am_generator ? "generator" : "receiver"; |
c3e5e585 | 258 | } |