Commit | Line | Data |
---|---|---|
0f78b815 | 1 | /* |
ded8347d MP |
2 | * Syscall wrappers to ensure that nothing gets done in dry_run mode |
3 | * and to handle system peculiarities. | |
0f78b815 WD |
4 | * |
5 | * Copyright (C) 1998 Andrew Tridgell | |
6 | * Copyright (C) 2002 Martin Pool | |
7 | * Copyright (C) 2003, 2004, 2005, 2006 Wayne Davison | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
e7c67065 WD |
19 | * You should have received a copy of the GNU General Public License along |
20 | * with this program; if not, write to the Free Software Foundation, Inc., | |
21 | * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. | |
0f78b815 | 22 | */ |
31e12522 AT |
23 | |
24 | #include "rsync.h" | |
25 | ||
4f5b0756 | 26 | #if !defined MKNOD_CREATES_SOCKETS && defined HAVE_SYS_UN_H |
da6eb9d1 WD |
27 | #include <sys/un.h> |
28 | #endif | |
29 | ||
31e12522 | 30 | extern int dry_run; |
f0fca04e | 31 | extern int read_only; |
2b086e03 | 32 | extern int list_only; |
f0b4fdaf | 33 | extern int preserve_perms; |
f0fca04e | 34 | |
cfeed4da WD |
35 | #define RETURN_ERROR_IF(x,e) \ |
36 | do { \ | |
37 | if (x) { \ | |
38 | errno = (e); \ | |
39 | return -1; \ | |
40 | } \ | |
41 | } while (0) | |
42 | ||
43 | #define RETURN_ERROR_IF_RO_OR_LO RETURN_ERROR_IF(read_only || list_only, EROFS) | |
31e12522 | 44 | |
63cf5ae7 | 45 | int do_unlink(const char *fname) |
31e12522 AT |
46 | { |
47 | if (dry_run) return 0; | |
cfeed4da | 48 | RETURN_ERROR_IF_RO_OR_LO; |
31e12522 AT |
49 | return unlink(fname); |
50 | } | |
51 | ||
63cf5ae7 | 52 | int do_symlink(const char *fname1, const char *fname2) |
31e12522 AT |
53 | { |
54 | if (dry_run) return 0; | |
cfeed4da | 55 | RETURN_ERROR_IF_RO_OR_LO; |
31e12522 AT |
56 | return symlink(fname1, fname2); |
57 | } | |
58 | ||
4f5b0756 | 59 | #ifdef HAVE_LINK |
63cf5ae7 | 60 | int do_link(const char *fname1, const char *fname2) |
31e12522 AT |
61 | { |
62 | if (dry_run) return 0; | |
cfeed4da | 63 | RETURN_ERROR_IF_RO_OR_LO; |
31e12522 AT |
64 | return link(fname1, fname2); |
65 | } | |
f92ef572 | 66 | #endif |
31e12522 | 67 | |
7308bd66 AT |
68 | int do_lchown(const char *path, uid_t owner, gid_t group) |
69 | { | |
70 | if (dry_run) return 0; | |
cfeed4da | 71 | RETURN_ERROR_IF_RO_OR_LO; |
4f5b0756 | 72 | #ifndef HAVE_LCHOWN |
05154760 WD |
73 | #define lchown chown |
74 | #endif | |
7308bd66 AT |
75 | return lchown(path, owner, group); |
76 | } | |
77 | ||
31e12522 AT |
78 | int do_mknod(char *pathname, mode_t mode, dev_t dev) |
79 | { | |
80 | if (dry_run) return 0; | |
cfeed4da | 81 | RETURN_ERROR_IF_RO_OR_LO; |
4f5b0756 | 82 | #if !defined MKNOD_CREATES_FIFOS && defined HAVE_MKFIFO |
da6eb9d1 WD |
83 | if (S_ISFIFO(mode)) |
84 | return mkfifo(pathname, mode); | |
85 | #endif | |
4f5b0756 | 86 | #if !defined MKNOD_CREATES_SOCKETS && defined HAVE_SYS_UN_H |
da6eb9d1 WD |
87 | if (S_ISSOCK(mode)) { |
88 | int sock; | |
89 | struct sockaddr_un saddr; | |
90 | unsigned int len; | |
91 | ||
92 | saddr.sun_family = AF_UNIX; | |
93 | len = strlcpy(saddr.sun_path, pathname, sizeof saddr.sun_path); | |
4f5b0756 | 94 | #ifdef HAVE_SOCKADDR_UN_LEN |
da6eb9d1 WD |
95 | saddr.sun_len = len >= sizeof saddr.sun_path |
96 | ? sizeof saddr.sun_path : len + 1; | |
97 | #endif | |
98 | ||
99 | if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0 | |
100 | || (unlink(pathname) < 0 && errno != ENOENT) | |
101 | || (bind(sock, (struct sockaddr*)&saddr, sizeof saddr)) < 0) | |
102 | return -1; | |
103 | close(sock); | |
d11f5c6e | 104 | #ifdef HAVE_CHMOD |
da6eb9d1 | 105 | return do_chmod(pathname, mode); |
d11f5c6e WD |
106 | #else |
107 | return 0; | |
108 | #endif | |
da6eb9d1 WD |
109 | } |
110 | #endif | |
4f5b0756 | 111 | #ifdef HAVE_MKNOD |
31e12522 | 112 | return mknod(pathname, mode, dev); |
da6eb9d1 WD |
113 | #else |
114 | return -1; | |
f92ef572 | 115 | #endif |
da6eb9d1 | 116 | } |
31e12522 | 117 | |
63cf5ae7 | 118 | int do_rmdir(const char *pathname) |
31e12522 AT |
119 | { |
120 | if (dry_run) return 0; | |
cfeed4da | 121 | RETURN_ERROR_IF_RO_OR_LO; |
31e12522 AT |
122 | return rmdir(pathname); |
123 | } | |
124 | ||
63cf5ae7 | 125 | int do_open(const char *pathname, int flags, mode_t mode) |
31e12522 | 126 | { |
3420c8e6 | 127 | if (flags != O_RDONLY) { |
7a27e9b5 | 128 | RETURN_ERROR_IF(dry_run, 0); |
cfeed4da | 129 | RETURN_ERROR_IF_RO_OR_LO; |
3420c8e6 | 130 | } |
b0f3f578 | 131 | |
e106de49 | 132 | return open(pathname, flags | O_BINARY, mode); |
31e12522 | 133 | } |
7308bd66 | 134 | |
4f5b0756 | 135 | #ifdef HAVE_CHMOD |
7308bd66 AT |
136 | int do_chmod(const char *path, mode_t mode) |
137 | { | |
f0b4fdaf | 138 | int code; |
7308bd66 | 139 | if (dry_run) return 0; |
cfeed4da | 140 | RETURN_ERROR_IF_RO_OR_LO; |
d11f5c6e WD |
141 | if (S_ISLNK(mode)) { |
142 | #ifdef HAVE_LCHMOD | |
143 | code = lchmod(path, mode & CHMOD_BITS); | |
144 | #else | |
145 | code = 1; | |
146 | #endif | |
147 | } else | |
148 | code = chmod(path, mode & CHMOD_BITS); | |
cfeed4da | 149 | if (code != 0 && preserve_perms) |
f0b4fdaf DD |
150 | return code; |
151 | return 0; | |
7308bd66 | 152 | } |
f92ef572 | 153 | #endif |
1b2d733a | 154 | |
63cf5ae7 | 155 | int do_rename(const char *fname1, const char *fname2) |
1b2d733a AT |
156 | { |
157 | if (dry_run) return 0; | |
cfeed4da | 158 | RETURN_ERROR_IF_RO_OR_LO; |
1b2d733a AT |
159 | return rename(fname1, fname2); |
160 | } | |
161 | ||
bf4e725d MP |
162 | void trim_trailing_slashes(char *name) |
163 | { | |
c127e8aa | 164 | int l; |
bf4e725d MP |
165 | /* Some BSD systems cannot make a directory if the name |
166 | * contains a trailing slash. | |
167 | * <http://www.opensource.apple.com/bugs/X/BSD%20Kernel/2734739.html> */ | |
0f78b815 | 168 | |
c127e8aa MP |
169 | /* Don't change empty string; and also we can't improve on |
170 | * "/" */ | |
0f78b815 | 171 | |
c127e8aa MP |
172 | l = strlen(name); |
173 | while (l > 1) { | |
174 | if (name[--l] != '/') | |
175 | break; | |
176 | name[l] = '\0'; | |
bf4e725d MP |
177 | } |
178 | } | |
179 | ||
1b2d733a AT |
180 | int do_mkdir(char *fname, mode_t mode) |
181 | { | |
cfeed4da WD |
182 | if (dry_run) return 0; |
183 | RETURN_ERROR_IF_RO_OR_LO; | |
0f78b815 | 184 | trim_trailing_slashes(fname); |
1b2d733a AT |
185 | return mkdir(fname, mode); |
186 | } | |
187 | ||
f62c17e3 AT |
188 | /* like mkstemp but forces permissions */ |
189 | int do_mkstemp(char *template, mode_t perms) | |
190 | { | |
7a27e9b5 | 191 | RETURN_ERROR_IF(dry_run, 0); |
cfeed4da | 192 | RETURN_ERROR_IF(read_only, EROFS); |
f62c17e3 | 193 | |
4f5b0756 | 194 | #if defined HAVE_SECURE_MKSTEMP && defined HAVE_FCHMOD && (!defined HAVE_OPEN64 || defined HAVE_MKSTEMP64) |
f62c17e3 AT |
195 | { |
196 | int fd = mkstemp(template); | |
cfeed4da WD |
197 | if (fd == -1) |
198 | return -1; | |
199 | if (fchmod(fd, perms) != 0 && preserve_perms) { | |
200 | int errno_save = errno; | |
f62c17e3 AT |
201 | close(fd); |
202 | unlink(template); | |
cfeed4da | 203 | errno = errno_save; |
f62c17e3 AT |
204 | return -1; |
205 | } | |
4f5b0756 | 206 | #if defined HAVE_SETMODE && O_BINARY |
3267d6a9 WD |
207 | setmode(fd, O_BINARY); |
208 | #endif | |
f62c17e3 AT |
209 | return fd; |
210 | } | |
211 | #else | |
cfeed4da WD |
212 | if (!mktemp(template)) |
213 | return -1; | |
25f2cb3d | 214 | return do_open(template, O_RDWR|O_EXCL|O_CREAT, perms); |
f62c17e3 | 215 | #endif |
1b2d733a | 216 | } |
bcacc18b AT |
217 | |
218 | int do_stat(const char *fname, STRUCT_STAT *st) | |
219 | { | |
4f5b0756 | 220 | #ifdef USE_STAT64_FUNCS |
bcacc18b AT |
221 | return stat64(fname, st); |
222 | #else | |
223 | return stat(fname, st); | |
224 | #endif | |
225 | } | |
226 | ||
227 | int do_lstat(const char *fname, STRUCT_STAT *st) | |
228 | { | |
4f5b0756 WD |
229 | #ifdef SUPPORT_LINKS |
230 | # ifdef USE_STAT64_FUNCS | |
bcacc18b | 231 | return lstat64(fname, st); |
0957a746 | 232 | # else |
bcacc18b | 233 | return lstat(fname, st); |
0957a746 WD |
234 | # endif |
235 | #else | |
236 | return do_stat(fname, st); | |
bcacc18b AT |
237 | #endif |
238 | } | |
239 | ||
240 | int do_fstat(int fd, STRUCT_STAT *st) | |
241 | { | |
4f5b0756 | 242 | #ifdef USE_STAT64_FUNCS |
bcacc18b AT |
243 | return fstat64(fd, st); |
244 | #else | |
245 | return fstat(fd, st); | |
246 | #endif | |
247 | } | |
73233f0f AT |
248 | |
249 | OFF_T do_lseek(int fd, OFF_T offset, int whence) | |
250 | { | |
ebd33e0c | 251 | #ifdef HAVE_LSEEK64 |
f853b777 WD |
252 | #if !SIZEOF_OFF64_T |
253 | OFF_T lseek64(); | |
254 | #else | |
f28ee65b | 255 | off64_t lseek64(); |
f853b777 | 256 | #endif |
73233f0f AT |
257 | return lseek64(fd, offset, whence); |
258 | #else | |
259 | return lseek(fd, offset, whence); | |
260 | #endif | |
261 | } | |
d6e6ecbd AT |
262 | |
263 | char *d_name(struct dirent *di) | |
264 | { | |
4f5b0756 | 265 | #ifdef HAVE_BROKEN_READDIR |
59503278 AT |
266 | return (di->d_name - 2); |
267 | #else | |
d6e6ecbd | 268 | return di->d_name; |
59503278 | 269 | #endif |
d6e6ecbd | 270 | } |