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; |
e327acec | 70 | rprintf(FERROR,"delete_file: unlink(%s) : %s\n", fname, strerror(errno)); |
3cb6f5d6 AT |
71 | return -1; |
72 | } | |
73 | ||
74 | if (do_rmdir(fname) == 0 || errno == ENOENT) return 0; | |
05848a2c AT |
75 | if (!force_delete || !recurse || |
76 | (errno != ENOTEMPTY && errno != EEXIST)) { | |
e327acec | 77 | rprintf(FERROR,"delete_file: rmdir(%s) : %s\n", fname, strerror(errno)); |
3cb6f5d6 AT |
78 | return -1; |
79 | } | |
80 | ||
81 | /* now we do a recsursive delete on the directory ... */ | |
82 | d = opendir(fname); | |
83 | if (!d) { | |
e327acec | 84 | rprintf(FERROR,"delete_file: opendir(%s): %s\n", |
3cb6f5d6 AT |
85 | fname,strerror(errno)); |
86 | return -1; | |
87 | } | |
88 | ||
89 | for (di=readdir(d); di; di=readdir(d)) { | |
d6e6ecbd AT |
90 | char *dname = d_name(di); |
91 | if (strcmp(dname,".")==0 || | |
92 | strcmp(dname,"..")==0) | |
3cb6f5d6 | 93 | continue; |
8950ac03 | 94 | snprintf(buf, sizeof(buf), "%s/%s", fname, dname); |
3cb6f5d6 | 95 | if (verbose > 0) |
9486289c | 96 | rprintf(FINFO,"deleting %s\n", buf); |
3cb6f5d6 AT |
97 | if (delete_file(buf) != 0) { |
98 | closedir(d); | |
99 | return -1; | |
100 | } | |
101 | } | |
102 | ||
103 | closedir(d); | |
104 | ||
105 | if (do_rmdir(fname) != 0) { | |
e327acec | 106 | rprintf(FERROR,"delete_file: rmdir(%s) : %s\n", fname, strerror(errno)); |
3cb6f5d6 AT |
107 | return -1; |
108 | } | |
109 | ||
110 | return 0; | |
111 | } | |
c627d613 | 112 | |
460f6b99 DD |
113 | static int is_in_group(gid_t gid) |
114 | { | |
9422bb3f | 115 | #ifdef GETGROUPS_T |
460f6b99 DD |
116 | static gid_t last_in = (gid_t) -2, last_out; |
117 | static int ngroups = -2; | |
9422bb3f | 118 | static GETGROUPS_T *gidset; |
460f6b99 DD |
119 | int n; |
120 | ||
121 | if (gid == last_in) | |
122 | return last_out; | |
123 | if (ngroups < -1) { | |
124 | /* treat failure (-1) as if not member of any group */ | |
125 | ngroups = getgroups(0, 0); | |
126 | if (ngroups > 0) { | |
9422bb3f | 127 | gidset = (GETGROUPS_T *) malloc(ngroups * sizeof(GETGROUPS_T)); |
460f6b99 DD |
128 | ngroups = getgroups(ngroups, gidset); |
129 | } | |
130 | } | |
131 | ||
132 | last_in = gid; | |
133 | last_out = 0; | |
134 | for (n = 0; n < ngroups; n++) { | |
135 | if (gidset[n] == gid) { | |
136 | last_out = 1; | |
137 | break; | |
138 | } | |
139 | } | |
140 | return last_out; | |
141 | ||
142 | #else | |
143 | return 0; | |
144 | #endif | |
145 | } | |
c627d613 | 146 | |
2f03f956 AT |
147 | int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st, |
148 | int report) | |
c627d613 | 149 | { |
667e72a1 AT |
150 | int updated = 0; |
151 | STRUCT_STAT st2; | |
460f6b99 | 152 | int change_uid, change_gid; |
c627d613 | 153 | |
667e72a1 | 154 | if (dry_run) return 0; |
c627d613 | 155 | |
667e72a1 AT |
156 | if (!st) { |
157 | if (link_stat(fname,&st2) != 0) { | |
158 | rprintf(FERROR,"stat %s : %s\n",fname,strerror(errno)); | |
159 | return 0; | |
160 | } | |
161 | st = &st2; | |
162 | } | |
c627d613 | 163 | |
667e72a1 | 164 | if (preserve_times && !S_ISLNK(st->st_mode) && |
5b56cc19 | 165 | cmp_modtime(st->st_mtime, file->modtime) != 0) { |
8d249b63 AT |
166 | /* don't complain about not setting times on directories |
167 | because some filesystems can't do it */ | |
168 | if (set_modtime(fname,file->modtime) != 0 && | |
169 | !S_ISDIR(st->st_mode)) { | |
667e72a1 AT |
170 | rprintf(FERROR,"failed to set times on %s : %s\n", |
171 | fname,strerror(errno)); | |
172 | return 0; | |
8d249b63 AT |
173 | } else { |
174 | updated = 1; | |
667e72a1 AT |
175 | } |
176 | } | |
177 | ||
460f6b99 | 178 | change_uid = am_root && preserve_uid && st->st_uid != file->uid; |
128cf584 | 179 | change_gid = preserve_gid && file->gid != (gid_t) -1 && \ |
86692050 | 180 | st->st_gid != file->gid; |
460f6b99 DD |
181 | if (change_gid && !am_root) { |
182 | /* enforce bsd-style group semantics: non-root can only | |
183 | change to groups that the user is a member of */ | |
184 | change_gid = is_in_group(file->gid); | |
185 | } | |
186 | if (change_uid || change_gid) { | |
667e72a1 | 187 | if (do_lchown(fname, |
460f6b99 DD |
188 | change_uid?file->uid:st->st_uid, |
189 | change_gid?file->gid:st->st_gid) != 0) { | |
190 | /* shouldn't have attempted to change uid or gid | |
191 | unless have the privilege */ | |
192 | rprintf(FERROR,"chown %s : %s\n", fname,strerror(errno)); | |
193 | return 0; | |
667e72a1 | 194 | } |
a5827a28 AT |
195 | /* a lchown had been done - we have to re-stat if the |
196 | destination had the setuid or setgid bits set due | |
197 | to the side effect of the chown call */ | |
198 | if (st->st_mode & (S_ISUID | S_ISGID)) { | |
199 | link_stat(fname, st); | |
200 | } | |
460f6b99 | 201 | updated = 1; |
667e72a1 | 202 | } |
c627d613 AT |
203 | |
204 | #ifdef HAVE_CHMOD | |
972a3619 | 205 | if (!S_ISLNK(st->st_mode)) { |
972a3619 DD |
206 | if (st->st_mode != file->mode) { |
207 | updated = 1; | |
f08baea3 | 208 | if (do_chmod(fname,file->mode) != 0) { |
972a3619 DD |
209 | rprintf(FERROR,"failed to set permissions on %s : %s\n", |
210 | fname,strerror(errno)); | |
211 | return 0; | |
212 | } | |
667e72a1 AT |
213 | } |
214 | } | |
c627d613 | 215 | #endif |
c627d613 | 216 | |
667e72a1 AT |
217 | if (verbose > 1 && report) { |
218 | if (updated) | |
219 | rprintf(FINFO,"%s\n",fname); | |
220 | else | |
221 | rprintf(FINFO,"%s is uptodate\n",fname); | |
222 | } | |
223 | return updated; | |
c627d613 AT |
224 | } |
225 | ||
226 | ||
34ccb63e AT |
227 | void sig_int(void) |
228 | { | |
65417579 | 229 | exit_cleanup(RERR_SIGNAL); |
c627d613 AT |
230 | } |
231 | ||
232 | ||
c95da96a AT |
233 | /* finish off a file transfer, renaming the file and setting the permissions |
234 | and ownership */ | |
2f03f956 | 235 | void finish_transfer(char *fname, char *fnametmp, struct file_struct *file) |
c95da96a | 236 | { |
53dd3135 DD |
237 | if (make_backups && !make_backup(fname)) |
238 | return; | |
c95da96a AT |
239 | |
240 | /* move tmp file over real file */ | |
c7c11a0d | 241 | if (robust_rename(fnametmp,fname) != 0) { |
c95da96a AT |
242 | if (errno == EXDEV) { |
243 | /* rename failed on cross-filesystem link. | |
244 | Copy the file instead. */ | |
972a3619 | 245 | if (copy_file(fnametmp,fname, file->mode & INITACCESSPERMS)) { |
c95da96a AT |
246 | rprintf(FERROR,"copy %s -> %s : %s\n", |
247 | fnametmp,fname,strerror(errno)); | |
248 | } else { | |
249 | set_perms(fname,file,NULL,0); | |
250 | } | |
c95da96a AT |
251 | } else { |
252 | rprintf(FERROR,"rename %s -> %s : %s\n", | |
253 | fnametmp,fname,strerror(errno)); | |
c95da96a | 254 | } |
c7c11a0d | 255 | do_unlink(fnametmp); |
c95da96a AT |
256 | } else { |
257 | set_perms(fname,file,NULL,0); | |
258 | } | |
259 | } |