Commit | Line | Data |
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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; | |
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 | /* |
65d0a49f | 46 | * delete a file or directory. If force_delete is set then delete |
3cb6f5d6 AT |
47 | * recursively |
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; | |
05848a2c AT |
76 | if (!force_delete || !recurse || |
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 | ||
91 | for (di=readdir(d); di; di=readdir(d)) { | |
d6e6ecbd AT |
92 | char *dname = d_name(di); |
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 | } | |
103 | } | |
104 | ||
105 | closedir(d); | |
106 | ||
107 | if (do_rmdir(fname) != 0) { | |
ea42541f WD |
108 | rprintf(FERROR, "delete_file: rmdir %s failed: %s\n", |
109 | full_fname(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; |
c627d613 | 156 | |
667e72a1 | 157 | if (dry_run) return 0; |
c627d613 | 158 | |
667e72a1 AT |
159 | if (!st) { |
160 | if (link_stat(fname,&st2) != 0) { | |
ea42541f WD |
161 | rprintf(FERROR, "stat %s failed: %s\n", |
162 | full_fname(fname), strerror(errno)); | |
667e72a1 AT |
163 | return 0; |
164 | } | |
165 | st = &st2; | |
166 | } | |
c627d613 | 167 | |
667e72a1 | 168 | if (preserve_times && !S_ISLNK(st->st_mode) && |
5b56cc19 | 169 | cmp_modtime(st->st_mtime, file->modtime) != 0) { |
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)) { | |
ea42541f WD |
174 | rprintf(FERROR, "failed to set times on %s: %s\n", |
175 | full_fname(fname), strerror(errno)); | |
667e72a1 | 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; |
128cf584 | 183 | change_gid = preserve_gid && file->gid != (gid_t) -1 && \ |
86692050 | 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 */ | |
ea42541f WD |
196 | rprintf(FERROR, "chown %s failed: %s\n", |
197 | full_fname(fname), strerror(errno)); | |
460f6b99 | 198 | return 0; |
667e72a1 | 199 | } |
a5827a28 AT |
200 | /* a lchown had been done - we have to re-stat if the |
201 | destination had the setuid or setgid bits set due | |
202 | to the side effect of the chown call */ | |
203 | if (st->st_mode & (S_ISUID | S_ISGID)) { | |
204 | link_stat(fname, st); | |
205 | } | |
460f6b99 | 206 | updated = 1; |
667e72a1 | 207 | } |
c627d613 AT |
208 | |
209 | #ifdef HAVE_CHMOD | |
972a3619 | 210 | if (!S_ISLNK(st->st_mode)) { |
b0d791bb | 211 | if ((st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS)) { |
972a3619 | 212 | updated = 1; |
b0d791bb | 213 | if (do_chmod(fname,(file->mode & CHMOD_BITS)) != 0) { |
ea42541f WD |
214 | rprintf(FERROR, "failed to set permissions on %s: %s\n", |
215 | full_fname(fname), strerror(errno)); | |
972a3619 DD |
216 | return 0; |
217 | } | |
667e72a1 AT |
218 | } |
219 | } | |
c627d613 | 220 | #endif |
c627d613 | 221 | |
667e72a1 AT |
222 | if (verbose > 1 && report) { |
223 | if (updated) | |
224 | rprintf(FINFO,"%s\n",fname); | |
225 | else | |
226 | rprintf(FINFO,"%s is uptodate\n",fname); | |
227 | } | |
228 | return updated; | |
c627d613 AT |
229 | } |
230 | ||
231 | ||
34ccb63e AT |
232 | void sig_int(void) |
233 | { | |
65417579 | 234 | exit_cleanup(RERR_SIGNAL); |
c627d613 AT |
235 | } |
236 | ||
237 | ||
c95da96a AT |
238 | /* finish off a file transfer, renaming the file and setting the permissions |
239 | and ownership */ | |
2f03f956 | 240 | void finish_transfer(char *fname, char *fnametmp, struct file_struct *file) |
c95da96a | 241 | { |
53dd3135 DD |
242 | if (make_backups && !make_backup(fname)) |
243 | return; | |
c95da96a AT |
244 | |
245 | /* move tmp file over real file */ | |
c7c11a0d | 246 | if (robust_rename(fnametmp,fname) != 0) { |
c95da96a AT |
247 | if (errno == EXDEV) { |
248 | /* rename failed on cross-filesystem link. | |
249 | Copy the file instead. */ | |
972a3619 | 250 | if (copy_file(fnametmp,fname, file->mode & INITACCESSPERMS)) { |
ea42541f WD |
251 | rprintf(FERROR, "copy %s -> \"%s\": %s\n", |
252 | full_fname(fnametmp), fname, | |
253 | strerror(errno)); | |
c95da96a AT |
254 | } else { |
255 | set_perms(fname,file,NULL,0); | |
256 | } | |
c95da96a | 257 | } else { |
ea42541f WD |
258 | rprintf(FERROR,"rename %s -> \"%s\": %s\n", |
259 | full_fname(fnametmp), fname, strerror(errno)); | |
c95da96a | 260 | } |
c7c11a0d | 261 | do_unlink(fnametmp); |
c95da96a AT |
262 | } else { |
263 | set_perms(fname,file,NULL,0); | |
264 | } | |
265 | } |