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; |
81284832 | 28 | extern int preserve_executability; |
2f03f956 | 29 | extern int preserve_times; |
82471e68 | 30 | extern int omit_dir_times; |
81284832 | 31 | extern int orig_umask; |
7b8356d0 | 32 | extern int am_root; |
794b0a03 | 33 | extern int am_server; |
c3e5e585 WD |
34 | extern int am_sender; |
35 | extern int am_generator; | |
ed9d969c | 36 | extern int am_starting_up; |
2f03f956 AT |
37 | extern int preserve_uid; |
38 | extern int preserve_gid; | |
c786a7ae | 39 | extern int inplace; |
81b07870 | 40 | extern int keep_dirlinks; |
2f03f956 | 41 | extern int make_backups; |
c786a7ae | 42 | extern struct stats stats; |
fe055c71 AT |
43 | |
44 | ||
c627d613 AT |
45 | /* |
46 | free a sums struct | |
47 | */ | |
2f03f956 | 48 | void free_sums(struct sum_struct *s) |
c627d613 | 49 | { |
298c10d5 AT |
50 | if (s->sums) free(s->sums); |
51 | free(s); | |
c627d613 AT |
52 | } |
53 | ||
81284832 WD |
54 | /* This is only called when we aren't preserving permissions. Figure out what |
55 | * the permissions should be and return them merged back into the mode. */ | |
56 | mode_t dest_mode(mode_t flist_mode, mode_t dest_mode, int exists) | |
57 | { | |
58 | /* If the file already exists we'll return the local permissions, | |
59 | * possibly tweaked by the --executability option. */ | |
60 | if (exists) { | |
61 | if (preserve_executability && S_ISREG(flist_mode)) { | |
62 | /* If the source file is executable, grant execute | |
63 | * rights to everyone who can read, but ONLY if the | |
64 | * file isn't already executable. */ | |
65 | if (!(flist_mode & 0111)) | |
66 | dest_mode &= ~0111; | |
67 | else if (!(dest_mode & 0111)) | |
68 | dest_mode |= (dest_mode & 0444) >> 2; | |
69 | } | |
70 | } else | |
71 | dest_mode = flist_mode & ~orig_umask; | |
72 | return (flist_mode & ~CHMOD_BITS) | (dest_mode & CHMOD_BITS); | |
73 | } | |
74 | ||
36119f6e WD |
75 | int set_file_attrs(char *fname, struct file_struct *file, STRUCT_STAT *st, |
76 | int flags) | |
c627d613 | 77 | { |
667e72a1 AT |
78 | int updated = 0; |
79 | STRUCT_STAT st2; | |
460f6b99 | 80 | int change_uid, change_gid; |
c627d613 | 81 | |
667e72a1 | 82 | if (!st) { |
f227ffe4 WD |
83 | if (dry_run) |
84 | return 1; | |
373ef160 | 85 | if (link_stat(fname, &st2, 0) < 0) { |
d62bcc17 WD |
86 | rsyserr(FERROR, errno, "stat %s failed", |
87 | full_fname(fname)); | |
667e72a1 AT |
88 | return 0; |
89 | } | |
90 | st = &st2; | |
91 | } | |
c627d613 | 92 | |
c8d34657 | 93 | if (!preserve_times || (S_ISDIR(st->st_mode) && omit_dir_times)) |
36119f6e WD |
94 | flags |= ATTRS_SKIP_MTIME; |
95 | if (!(flags & ATTRS_SKIP_MTIME) | |
4ecc9e6b | 96 | && cmp_modtime(st->st_mtime, file->modtime) != 0) { |
c8d34657 WD |
97 | int ret = set_modtime(fname, file->modtime, st->st_mode); |
98 | if (ret < 0) { | |
d62bcc17 WD |
99 | rsyserr(FERROR, errno, "failed to set times on %s", |
100 | full_fname(fname)); | |
667e72a1 AT |
101 | return 0; |
102 | } | |
c8d34657 WD |
103 | if (ret == 0) /* ret == 1 if symlink could not be set */ |
104 | updated = 1; | |
667e72a1 AT |
105 | } |
106 | ||
7b6fa00f WD |
107 | change_uid = am_root && preserve_uid && st->st_uid != file->uid; |
108 | change_gid = preserve_gid && file->gid != GID_NONE | |
109 | && st->st_gid != file->gid; | |
4f5b0756 | 110 | #if !defined HAVE_LCHOWN && !defined CHOWN_MODIFIES_SYMLINK |
a41a1e87 WD |
111 | if (S_ISLNK(st->st_mode)) |
112 | ; | |
113 | else | |
114 | #endif | |
460f6b99 | 115 | if (change_uid || change_gid) { |
62c9e6b3 | 116 | if (verbose > 2) { |
ce37eb2d WD |
117 | if (change_uid) { |
118 | rprintf(FINFO, | |
4875d6b6 | 119 | "set uid of %s from %ld to %ld\n", |
45c49b52 | 120 | fname, |
7b6fa00f | 121 | (long)st->st_uid, (long)file->uid); |
ce37eb2d WD |
122 | } |
123 | if (change_gid) { | |
124 | rprintf(FINFO, | |
4875d6b6 | 125 | "set gid of %s from %ld to %ld\n", |
45c49b52 | 126 | fname, |
7b6fa00f | 127 | (long)st->st_gid, (long)file->gid); |
ce37eb2d WD |
128 | } |
129 | } | |
667e72a1 | 130 | if (do_lchown(fname, |
7b6fa00f WD |
131 | change_uid ? file->uid : st->st_uid, |
132 | change_gid ? file->gid : st->st_gid) != 0) { | |
460f6b99 | 133 | /* shouldn't have attempted to change uid or gid |
a174e1ed | 134 | * unless have the privilege */ |
d62bcc17 | 135 | rsyserr(FERROR, errno, "%s %s failed", |
a174e1ed | 136 | change_uid ? "chown" : "chgrp", |
d62bcc17 | 137 | full_fname(fname)); |
460f6b99 | 138 | return 0; |
667e72a1 | 139 | } |
a5827a28 | 140 | /* a lchown had been done - we have to re-stat if the |
dd096ae0 WD |
141 | * destination had the setuid or setgid bits set due |
142 | * to the side effect of the chown call */ | |
a5827a28 | 143 | if (st->st_mode & (S_ISUID | S_ISGID)) { |
81b07870 WD |
144 | link_stat(fname, st, |
145 | keep_dirlinks && S_ISDIR(st->st_mode)); | |
a5827a28 | 146 | } |
460f6b99 | 147 | updated = 1; |
667e72a1 | 148 | } |
c627d613 | 149 | |
4f5b0756 | 150 | #ifdef HAVE_CHMOD |
c8d34657 WD |
151 | if ((st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS)) { |
152 | int ret = do_chmod(fname, file->mode); | |
153 | if (ret < 0) { | |
154 | rsyserr(FERROR, errno, | |
155 | "failed to set permissions on %s", | |
156 | full_fname(fname)); | |
157 | return 0; | |
667e72a1 | 158 | } |
c8d34657 WD |
159 | if (ret == 0) /* ret == 1 if symlink could not be set */ |
160 | updated = 1; | |
667e72a1 | 161 | } |
c627d613 | 162 | #endif |
6a7cc46c | 163 | |
36119f6e | 164 | if (verbose > 1 && flags & ATTRS_REPORT) { |
8324bd5c WD |
165 | enum logcode code = daemon_log_format_has_i || dry_run |
166 | ? FCLIENT : FINFO; | |
667e72a1 | 167 | if (updated) |
45c49b52 | 168 | rprintf(code, "%s\n", fname); |
667e72a1 | 169 | else |
45c49b52 | 170 | rprintf(code, "%s is uptodate\n", fname); |
667e72a1 AT |
171 | } |
172 | return updated; | |
c627d613 AT |
173 | } |
174 | ||
b8e9c234 | 175 | RETSIGTYPE sig_int(UNUSED(int val)) |
34ccb63e | 176 | { |
d5a0b483 WD |
177 | /* KLUGE: if the user hits Ctrl-C while ssh is prompting |
178 | * for a password, then our cleanup's sending of a SIGUSR1 | |
179 | * signal to all our children may kill ssh before it has a | |
180 | * chance to restore the tty settings (i.e. turn echo back | |
181 | * on). By sleeping for a short time, ssh gets a bigger | |
182 | * chance to do the right thing. If child processes are | |
183 | * not ssh waiting for a password, then this tiny delay | |
184 | * shouldn't hurt anything. */ | |
185 | msleep(400); | |
65417579 | 186 | exit_cleanup(RERR_SIGNAL); |
c627d613 AT |
187 | } |
188 | ||
d8b1c923 WD |
189 | /* Finish off a file transfer: renaming the file and setting the file's |
190 | * attributes (e.g. permissions, ownership, etc.). If partialptr is not | |
191 | * NULL and the robust_rename() call is forced to copy the temp file, we | |
192 | * stage the file into the partial-dir and then rename it into place. */ | |
193 | void finish_transfer(char *fname, char *fnametmp, char *partialptr, | |
194 | struct file_struct *file, int ok_to_set_time, | |
195 | int overwriting_basis) | |
c95da96a | 196 | { |
62c9e6b3 WD |
197 | int ret; |
198 | ||
a3221d2a WD |
199 | if (inplace) { |
200 | if (verbose > 2) | |
45c49b52 | 201 | rprintf(FINFO, "finishing %s\n", fname); |
d8b1c923 | 202 | fnametmp = fname; |
36119f6e | 203 | goto do_set_file_attrs; |
a3221d2a WD |
204 | } |
205 | ||
997d9ea6 | 206 | if (make_backups && overwriting_basis && !make_backup(fname)) |
e484f0cc WD |
207 | return; |
208 | ||
ebeacb36 | 209 | /* Change permissions before putting the file into place. */ |
36119f6e WD |
210 | set_file_attrs(fnametmp, file, NULL, |
211 | ok_to_set_time ? 0 : ATTRS_SKIP_MTIME); | |
ebeacb36 | 212 | |
c95da96a | 213 | /* move tmp file over real file */ |
45c49b52 WD |
214 | if (verbose > 2) |
215 | rprintf(FINFO, "renaming %s to %s\n", fnametmp, fname); | |
d8b1c923 WD |
216 | ret = robust_rename(fnametmp, fname, partialptr, |
217 | file->mode & INITACCESSPERMS); | |
3d061653 | 218 | if (ret < 0) { |
d62bcc17 | 219 | rsyserr(FERROR, errno, "%s %s -> \"%s\"", |
45c49b52 WD |
220 | ret == -2 ? "copy" : "rename", |
221 | full_fname(fnametmp), fname); | |
c7c11a0d | 222 | do_unlink(fnametmp); |
077e59b7 | 223 | return; |
c95da96a | 224 | } |
ebeacb36 WD |
225 | if (ret == 0) { |
226 | /* The file was moved into place (not copied), so it's done. */ | |
227 | return; | |
228 | } | |
d8b1c923 WD |
229 | /* The file was copied, so tweak the perms of the copied file. If it |
230 | * was copied to partialptr, move it into its final destination. */ | |
231 | fnametmp = partialptr ? partialptr : fname; | |
232 | ||
36119f6e | 233 | do_set_file_attrs: |
d8b1c923 | 234 | set_file_attrs(fnametmp, file, NULL, |
36119f6e | 235 | ok_to_set_time ? 0 : ATTRS_SKIP_MTIME); |
d8b1c923 WD |
236 | |
237 | if (partialptr) { | |
238 | if (do_rename(fnametmp, fname) < 0) { | |
239 | rsyserr(FERROR, errno, "rename %s -> \"%s\"", | |
240 | full_fname(fnametmp), fname); | |
241 | } else | |
242 | handle_partial_dir(partialptr, PDIR_DELETE); | |
243 | } | |
c95da96a | 244 | } |
c3e5e585 WD |
245 | |
246 | const char *who_am_i(void) | |
247 | { | |
ed9d969c | 248 | if (am_starting_up) |
794b0a03 | 249 | return am_server ? "server" : "client"; |
ebeacb36 | 250 | return am_sender ? "sender" : am_generator ? "generator" : "receiver"; |
c3e5e585 | 251 | } |