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; |
2f03f956 | 27 | extern int preserve_times; |
7b8356d0 | 28 | extern int am_root; |
2f03f956 AT |
29 | extern int preserve_uid; |
30 | extern int preserve_gid; | |
31 | extern int preserve_perms; | |
32 | extern int make_backups; | |
fe055c71 AT |
33 | |
34 | ||
c627d613 AT |
35 | /* |
36 | free a sums struct | |
37 | */ | |
2f03f956 | 38 | void free_sums(struct sum_struct *s) |
c627d613 | 39 | { |
298c10d5 AT |
40 | if (s->sums) free(s->sums); |
41 | free(s); | |
c627d613 AT |
42 | } |
43 | ||
44 | ||
3cb6f5d6 | 45 | /* |
7a2fd68b WD |
46 | * delete a file or directory. If force_delete is set then delete |
47 | * recursively | |
3cb6f5d6 | 48 | */ |
2f03f956 | 49 | int delete_file(char *fname) |
3cb6f5d6 AT |
50 | { |
51 | DIR *d; | |
52 | struct dirent *di; | |
53 | char buf[MAXPATHLEN]; | |
54 | extern int force_delete; | |
bcacc18b | 55 | STRUCT_STAT st; |
3cb6f5d6 | 56 | int ret; |
05848a2c | 57 | extern int recurse; |
3cb6f5d6 | 58 | |
3cb6f5d6 | 59 | #if SUPPORT_LINKS |
bcacc18b | 60 | ret = do_lstat(fname, &st); |
3cb6f5d6 | 61 | #else |
bcacc18b | 62 | ret = do_stat(fname, &st); |
3cb6f5d6 AT |
63 | #endif |
64 | if (ret) { | |
3cb6f5d6 AT |
65 | return -1; |
66 | } | |
67 | ||
68 | if (!S_ISDIR(st.st_mode)) { | |
1d2c275f | 69 | if (robust_unlink(fname) == 0 || errno == ENOENT) return 0; |
ea42541f WD |
70 | rprintf(FERROR, "delete_file: unlink %s failed: %s\n", |
71 | full_fname(fname), strerror(errno)); | |
3cb6f5d6 AT |
72 | return -1; |
73 | } | |
74 | ||
75 | if (do_rmdir(fname) == 0 || errno == ENOENT) return 0; | |
7a2fd68b | 76 | if (!force_delete || !recurse || |
05848a2c | 77 | (errno != ENOTEMPTY && errno != EEXIST)) { |
ea42541f WD |
78 | rprintf(FERROR, "delete_file: rmdir %s failed: %s\n", |
79 | full_fname(fname), strerror(errno)); | |
3cb6f5d6 AT |
80 | return -1; |
81 | } | |
82 | ||
83 | /* now we do a recsursive delete on the directory ... */ | |
84 | d = opendir(fname); | |
85 | if (!d) { | |
ea42541f WD |
86 | rprintf(FERROR, "delete_file: opendir %s failed: %s\n", |
87 | full_fname(fname), strerror(errno)); | |
3cb6f5d6 AT |
88 | return -1; |
89 | } | |
90 | ||
6a7cc46c | 91 | for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) { |
d6e6ecbd | 92 | char *dname = d_name(di); |
6a7cc46c S |
93 | if (strcmp(dname,".") == 0 |
94 | || strcmp(dname,"..") == 0) | |
3cb6f5d6 | 95 | continue; |
8950ac03 | 96 | snprintf(buf, sizeof(buf), "%s/%s", fname, dname); |
3cb6f5d6 | 97 | if (verbose > 0) |
9486289c | 98 | rprintf(FINFO,"deleting %s\n", buf); |
3cb6f5d6 AT |
99 | if (delete_file(buf) != 0) { |
100 | closedir(d); | |
101 | return -1; | |
102 | } | |
7a2fd68b | 103 | } |
6a7cc46c | 104 | if (errno) { |
7a2fd68b WD |
105 | rprintf(FERROR, "delete_file: readdir %s failed: %s\n", |
106 | full_fname(fname), strerror(errno)); | |
6a7cc46c S |
107 | closedir(d); |
108 | return -1; | |
109 | } | |
3cb6f5d6 AT |
110 | |
111 | closedir(d); | |
7a2fd68b | 112 | |
3cb6f5d6 | 113 | if (do_rmdir(fname) != 0) { |
ea42541f WD |
114 | rprintf(FERROR, "delete_file: rmdir %s failed: %s\n", |
115 | full_fname(fname), strerror(errno)); | |
3cb6f5d6 AT |
116 | return -1; |
117 | } | |
118 | ||
119 | return 0; | |
120 | } | |
c627d613 | 121 | |
460f6b99 DD |
122 | static int is_in_group(gid_t gid) |
123 | { | |
9422bb3f | 124 | #ifdef GETGROUPS_T |
460f6b99 DD |
125 | static gid_t last_in = (gid_t) -2, last_out; |
126 | static int ngroups = -2; | |
9422bb3f | 127 | static GETGROUPS_T *gidset; |
460f6b99 DD |
128 | int n; |
129 | ||
130 | if (gid == last_in) | |
131 | return last_out; | |
132 | if (ngroups < -1) { | |
133 | /* treat failure (-1) as if not member of any group */ | |
134 | ngroups = getgroups(0, 0); | |
135 | if (ngroups > 0) { | |
58cadc86 | 136 | gidset = new_array(GETGROUPS_T, ngroups); |
460f6b99 DD |
137 | ngroups = getgroups(ngroups, gidset); |
138 | } | |
139 | } | |
140 | ||
141 | last_in = gid; | |
142 | last_out = 0; | |
143 | for (n = 0; n < ngroups; n++) { | |
144 | if (gidset[n] == gid) { | |
145 | last_out = 1; | |
146 | break; | |
147 | } | |
148 | } | |
149 | return last_out; | |
150 | ||
151 | #else | |
152 | return 0; | |
153 | #endif | |
154 | } | |
c627d613 | 155 | |
2f03f956 | 156 | int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st, |
6a7cc46c | 157 | int report) |
c627d613 | 158 | { |
667e72a1 AT |
159 | int updated = 0; |
160 | STRUCT_STAT st2; | |
460f6b99 | 161 | int change_uid, change_gid; |
c627d613 | 162 | |
667e72a1 | 163 | if (dry_run) return 0; |
c627d613 | 164 | |
667e72a1 AT |
165 | if (!st) { |
166 | if (link_stat(fname,&st2) != 0) { | |
ea42541f WD |
167 | rprintf(FERROR, "stat %s failed: %s\n", |
168 | full_fname(fname), strerror(errno)); | |
667e72a1 AT |
169 | return 0; |
170 | } | |
171 | st = &st2; | |
172 | } | |
c627d613 | 173 | |
667e72a1 | 174 | if (preserve_times && !S_ISLNK(st->st_mode) && |
5b56cc19 | 175 | cmp_modtime(st->st_mtime, file->modtime) != 0) { |
8d249b63 AT |
176 | /* don't complain about not setting times on directories |
177 | because some filesystems can't do it */ | |
178 | if (set_modtime(fname,file->modtime) != 0 && | |
179 | !S_ISDIR(st->st_mode)) { | |
ea42541f WD |
180 | rprintf(FERROR, "failed to set times on %s: %s\n", |
181 | full_fname(fname), strerror(errno)); | |
667e72a1 | 182 | return 0; |
8d249b63 AT |
183 | } else { |
184 | updated = 1; | |
667e72a1 AT |
185 | } |
186 | } | |
187 | ||
460f6b99 | 188 | change_uid = am_root && preserve_uid && st->st_uid != file->uid; |
128cf584 | 189 | change_gid = preserve_gid && file->gid != (gid_t) -1 && \ |
86692050 | 190 | st->st_gid != file->gid; |
460f6b99 DD |
191 | if (change_gid && !am_root) { |
192 | /* enforce bsd-style group semantics: non-root can only | |
193 | change to groups that the user is a member of */ | |
194 | change_gid = is_in_group(file->gid); | |
195 | } | |
196 | if (change_uid || change_gid) { | |
667e72a1 | 197 | if (do_lchown(fname, |
460f6b99 DD |
198 | change_uid?file->uid:st->st_uid, |
199 | change_gid?file->gid:st->st_gid) != 0) { | |
200 | /* shouldn't have attempted to change uid or gid | |
201 | unless have the privilege */ | |
ea42541f WD |
202 | rprintf(FERROR, "chown %s failed: %s\n", |
203 | full_fname(fname), strerror(errno)); | |
460f6b99 | 204 | return 0; |
667e72a1 | 205 | } |
a5827a28 AT |
206 | /* a lchown had been done - we have to re-stat if the |
207 | destination had the setuid or setgid bits set due | |
208 | to the side effect of the chown call */ | |
209 | if (st->st_mode & (S_ISUID | S_ISGID)) { | |
210 | link_stat(fname, st); | |
211 | } | |
460f6b99 | 212 | updated = 1; |
667e72a1 | 213 | } |
c627d613 AT |
214 | |
215 | #ifdef HAVE_CHMOD | |
972a3619 | 216 | if (!S_ISLNK(st->st_mode)) { |
b0d791bb | 217 | if ((st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS)) { |
972a3619 | 218 | updated = 1; |
b0d791bb | 219 | if (do_chmod(fname,(file->mode & CHMOD_BITS)) != 0) { |
ea42541f WD |
220 | rprintf(FERROR, "failed to set permissions on %s: %s\n", |
221 | full_fname(fname), strerror(errno)); | |
972a3619 DD |
222 | return 0; |
223 | } | |
667e72a1 AT |
224 | } |
225 | } | |
c627d613 | 226 | #endif |
6a7cc46c | 227 | |
667e72a1 AT |
228 | if (verbose > 1 && report) { |
229 | if (updated) | |
230 | rprintf(FINFO,"%s\n",fname); | |
231 | else | |
232 | rprintf(FINFO,"%s is uptodate\n",fname); | |
233 | } | |
234 | return updated; | |
c627d613 AT |
235 | } |
236 | ||
237 | ||
34ccb63e AT |
238 | void sig_int(void) |
239 | { | |
65417579 | 240 | exit_cleanup(RERR_SIGNAL); |
c627d613 AT |
241 | } |
242 | ||
243 | ||
c95da96a AT |
244 | /* finish off a file transfer, renaming the file and setting the permissions |
245 | and ownership */ | |
2f03f956 | 246 | void finish_transfer(char *fname, char *fnametmp, struct file_struct *file) |
c95da96a | 247 | { |
53dd3135 DD |
248 | if (make_backups && !make_backup(fname)) |
249 | return; | |
c95da96a AT |
250 | |
251 | /* move tmp file over real file */ | |
c7c11a0d | 252 | if (robust_rename(fnametmp,fname) != 0) { |
c95da96a | 253 | if (errno == EXDEV) { |
6a7cc46c | 254 | /* rename failed on cross-filesystem link. |
c95da96a | 255 | Copy the file instead. */ |
972a3619 | 256 | if (copy_file(fnametmp,fname, file->mode & INITACCESSPERMS)) { |
ea42541f WD |
257 | rprintf(FERROR, "copy %s -> \"%s\": %s\n", |
258 | full_fname(fnametmp), fname, | |
259 | strerror(errno)); | |
c95da96a AT |
260 | } else { |
261 | set_perms(fname,file,NULL,0); | |
262 | } | |
c95da96a | 263 | } else { |
ea42541f WD |
264 | rprintf(FERROR,"rename %s -> \"%s\": %s\n", |
265 | full_fname(fnametmp), fname, strerror(errno)); | |
c95da96a | 266 | } |
c7c11a0d | 267 | do_unlink(fnametmp); |
c95da96a AT |
268 | } else { |
269 | set_perms(fname,file,NULL,0); | |
270 | } | |
271 | } |