Commit | Line | Data |
---|---|---|
c627d613 AT |
1 | /* |
2 | Copyright (C) Andrew Tridgell 1996 | |
3 | Copyright (C) Paul Mackerras 1996 | |
4 | ||
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. | |
9 | ||
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. | |
14 | ||
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; | |
33 | extern char *backup_suffix; | |
fe055c71 AT |
34 | |
35 | ||
c627d613 AT |
36 | /* |
37 | free a sums struct | |
38 | */ | |
2f03f956 | 39 | void free_sums(struct sum_struct *s) |
c627d613 | 40 | { |
298c10d5 AT |
41 | if (s->sums) free(s->sums); |
42 | free(s); | |
c627d613 AT |
43 | } |
44 | ||
45 | ||
3cb6f5d6 AT |
46 | /* |
47 | * delete a file or directory. If force_delet is set then delete | |
48 | * recursively | |
49 | */ | |
2f03f956 | 50 | int delete_file(char *fname) |
3cb6f5d6 AT |
51 | { |
52 | DIR *d; | |
53 | struct dirent *di; | |
54 | char buf[MAXPATHLEN]; | |
55 | extern int force_delete; | |
bcacc18b | 56 | STRUCT_STAT st; |
3cb6f5d6 | 57 | int ret; |
05848a2c | 58 | extern int recurse; |
3cb6f5d6 AT |
59 | |
60 | if (do_unlink(fname) == 0 || errno == ENOENT) return 0; | |
61 | ||
62 | #if SUPPORT_LINKS | |
bcacc18b | 63 | ret = do_lstat(fname, &st); |
3cb6f5d6 | 64 | #else |
bcacc18b | 65 | ret = do_stat(fname, &st); |
3cb6f5d6 AT |
66 | #endif |
67 | if (ret) { | |
9486289c | 68 | rprintf(FERROR,"stat(%s) : %s\n", fname, strerror(errno)); |
3cb6f5d6 AT |
69 | return -1; |
70 | } | |
71 | ||
72 | if (!S_ISDIR(st.st_mode)) { | |
9486289c | 73 | rprintf(FERROR,"unlink(%s) : %s\n", fname, strerror(errno)); |
3cb6f5d6 AT |
74 | return -1; |
75 | } | |
76 | ||
77 | if (do_rmdir(fname) == 0 || errno == ENOENT) return 0; | |
05848a2c AT |
78 | if (!force_delete || !recurse || |
79 | (errno != ENOTEMPTY && errno != EEXIST)) { | |
9486289c | 80 | rprintf(FERROR,"rmdir(%s) : %s\n", fname, strerror(errno)); |
3cb6f5d6 AT |
81 | return -1; |
82 | } | |
83 | ||
84 | /* now we do a recsursive delete on the directory ... */ | |
85 | d = opendir(fname); | |
86 | if (!d) { | |
9486289c | 87 | rprintf(FERROR,"opendir(%s): %s\n", |
3cb6f5d6 AT |
88 | fname,strerror(errno)); |
89 | return -1; | |
90 | } | |
91 | ||
92 | for (di=readdir(d); di; di=readdir(d)) { | |
d6e6ecbd AT |
93 | char *dname = d_name(di); |
94 | if (strcmp(dname,".")==0 || | |
95 | strcmp(dname,"..")==0) | |
3cb6f5d6 | 96 | continue; |
37f9805d | 97 | slprintf(buf, sizeof(buf), "%s/%s", fname, dname); |
3cb6f5d6 | 98 | if (verbose > 0) |
9486289c | 99 | rprintf(FINFO,"deleting %s\n", buf); |
3cb6f5d6 AT |
100 | if (delete_file(buf) != 0) { |
101 | closedir(d); | |
102 | return -1; | |
103 | } | |
104 | } | |
105 | ||
106 | closedir(d); | |
107 | ||
108 | if (do_rmdir(fname) != 0) { | |
9486289c | 109 | rprintf(FERROR,"rmdir(%s) : %s\n", fname, strerror(errno)); |
3cb6f5d6 AT |
110 | return -1; |
111 | } | |
112 | ||
113 | return 0; | |
114 | } | |
c627d613 | 115 | |
460f6b99 DD |
116 | static int is_in_group(gid_t gid) |
117 | { | |
9422bb3f | 118 | #ifdef GETGROUPS_T |
460f6b99 DD |
119 | static gid_t last_in = (gid_t) -2, last_out; |
120 | static int ngroups = -2; | |
9422bb3f | 121 | static GETGROUPS_T *gidset; |
460f6b99 DD |
122 | int n; |
123 | ||
124 | if (gid == last_in) | |
125 | return last_out; | |
126 | if (ngroups < -1) { | |
127 | /* treat failure (-1) as if not member of any group */ | |
128 | ngroups = getgroups(0, 0); | |
129 | if (ngroups > 0) { | |
9422bb3f | 130 | gidset = (GETGROUPS_T *) malloc(ngroups * sizeof(GETGROUPS_T)); |
460f6b99 DD |
131 | ngroups = getgroups(ngroups, gidset); |
132 | } | |
133 | } | |
134 | ||
135 | last_in = gid; | |
136 | last_out = 0; | |
137 | for (n = 0; n < ngroups; n++) { | |
138 | if (gidset[n] == gid) { | |
139 | last_out = 1; | |
140 | break; | |
141 | } | |
142 | } | |
143 | return last_out; | |
144 | ||
145 | #else | |
146 | return 0; | |
147 | #endif | |
148 | } | |
c627d613 | 149 | |
2f03f956 AT |
150 | int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st, |
151 | int report) | |
c627d613 | 152 | { |
667e72a1 AT |
153 | int updated = 0; |
154 | STRUCT_STAT st2; | |
460f6b99 | 155 | int change_uid, change_gid; |
667e72a1 | 156 | extern int am_daemon; |
c627d613 | 157 | |
667e72a1 | 158 | if (dry_run) return 0; |
c627d613 | 159 | |
667e72a1 AT |
160 | if (!st) { |
161 | if (link_stat(fname,&st2) != 0) { | |
162 | rprintf(FERROR,"stat %s : %s\n",fname,strerror(errno)); | |
163 | return 0; | |
164 | } | |
165 | st = &st2; | |
166 | } | |
c627d613 | 167 | |
667e72a1 AT |
168 | if (preserve_times && !S_ISLNK(st->st_mode) && |
169 | st->st_mtime != file->modtime) { | |
8d249b63 AT |
170 | /* don't complain about not setting times on directories |
171 | because some filesystems can't do it */ | |
172 | if (set_modtime(fname,file->modtime) != 0 && | |
173 | !S_ISDIR(st->st_mode)) { | |
667e72a1 AT |
174 | rprintf(FERROR,"failed to set times on %s : %s\n", |
175 | fname,strerror(errno)); | |
176 | return 0; | |
8d249b63 AT |
177 | } else { |
178 | updated = 1; | |
667e72a1 AT |
179 | } |
180 | } | |
181 | ||
460f6b99 | 182 | change_uid = am_root && preserve_uid && st->st_uid != file->uid; |
86692050 DD |
183 | change_gid = !am_daemon && preserve_gid && file->gid != (gid_t) -1 && \ |
184 | st->st_gid != file->gid; | |
460f6b99 DD |
185 | if (change_gid && !am_root) { |
186 | /* enforce bsd-style group semantics: non-root can only | |
187 | change to groups that the user is a member of */ | |
188 | change_gid = is_in_group(file->gid); | |
189 | } | |
190 | if (change_uid || change_gid) { | |
667e72a1 | 191 | if (do_lchown(fname, |
460f6b99 DD |
192 | change_uid?file->uid:st->st_uid, |
193 | change_gid?file->gid:st->st_gid) != 0) { | |
194 | /* shouldn't have attempted to change uid or gid | |
195 | unless have the privilege */ | |
196 | rprintf(FERROR,"chown %s : %s\n", fname,strerror(errno)); | |
197 | return 0; | |
667e72a1 | 198 | } |
460f6b99 | 199 | updated = 1; |
667e72a1 | 200 | } |
c627d613 AT |
201 | |
202 | #ifdef HAVE_CHMOD | |
972a3619 DD |
203 | if (!S_ISLNK(st->st_mode)) { |
204 | int file_mode; | |
205 | if (preserve_perms) | |
206 | file_mode = file->mode; | |
207 | else | |
208 | file_mode = file->mode & ACCESSPERMS; | |
209 | if (st->st_mode != file->mode) { | |
210 | updated = 1; | |
211 | if (do_chmod(fname,file_mode) != 0) { | |
212 | rprintf(FERROR,"failed to set permissions on %s : %s\n", | |
213 | fname,strerror(errno)); | |
214 | return 0; | |
215 | } | |
667e72a1 AT |
216 | } |
217 | } | |
c627d613 | 218 | #endif |
c627d613 | 219 | |
667e72a1 AT |
220 | if (verbose > 1 && report) { |
221 | if (updated) | |
222 | rprintf(FINFO,"%s\n",fname); | |
223 | else | |
224 | rprintf(FINFO,"%s is uptodate\n",fname); | |
225 | } | |
226 | return updated; | |
c627d613 AT |
227 | } |
228 | ||
229 | ||
34ccb63e AT |
230 | void sig_int(void) |
231 | { | |
65417579 | 232 | exit_cleanup(RERR_SIGNAL); |
c627d613 AT |
233 | } |
234 | ||
53dd3135 DD |
235 | int make_backup(char *fname) |
236 | { | |
237 | char fnamebak[MAXPATHLEN]; | |
238 | if (strlen(fname) + strlen(backup_suffix) > (MAXPATHLEN-1)) { | |
239 | rprintf(FERROR,"backup filename too long\n"); | |
240 | return 0; | |
241 | } | |
242 | ||
241fc706 | 243 | slprintf(fnamebak,sizeof(fnamebak),"%s%s",fname,backup_suffix); |
53dd3135 DD |
244 | if (do_rename(fname,fnamebak) != 0) { |
245 | if (errno != ENOENT) { | |
241fc706 | 246 | rprintf(FERROR,"rename %s %s : %s\n",fname,fnamebak,strerror(errno)); |
53dd3135 DD |
247 | return 0; |
248 | } | |
249 | } else if (verbose > 1) { | |
250 | rprintf(FINFO,"backed up %s to %s\n",fname,fnamebak); | |
251 | } | |
252 | return 1; | |
253 | } | |
254 | ||
c627d613 | 255 | |
c95da96a AT |
256 | /* finish off a file transfer, renaming the file and setting the permissions |
257 | and ownership */ | |
2f03f956 | 258 | void finish_transfer(char *fname, char *fnametmp, struct file_struct *file) |
c95da96a | 259 | { |
53dd3135 DD |
260 | if (make_backups && !make_backup(fname)) |
261 | return; | |
c95da96a AT |
262 | |
263 | /* move tmp file over real file */ | |
264 | if (do_rename(fnametmp,fname) != 0) { | |
265 | if (errno == EXDEV) { | |
266 | /* rename failed on cross-filesystem link. | |
267 | Copy the file instead. */ | |
972a3619 | 268 | if (copy_file(fnametmp,fname, file->mode & INITACCESSPERMS)) { |
c95da96a AT |
269 | rprintf(FERROR,"copy %s -> %s : %s\n", |
270 | fnametmp,fname,strerror(errno)); | |
271 | } else { | |
272 | set_perms(fname,file,NULL,0); | |
273 | } | |
274 | do_unlink(fnametmp); | |
275 | } else { | |
276 | rprintf(FERROR,"rename %s -> %s : %s\n", | |
277 | fnametmp,fname,strerror(errno)); | |
278 | do_unlink(fnametmp); | |
279 | } | |
280 | } else { | |
281 | set_perms(fname,file,NULL,0); | |
282 | } | |
283 | } | |
284 | ||
285 | ||
dc5ddbcc | 286 |