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 | |
ba2133d6 | 7 | * Copyright (C) 2003-2007 Wayne Davison |
0f78b815 WD |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify | |
4fd842f9 | 10 | * it under the terms of the GNU General Public License version 3 as |
ba2133d6 | 11 | * published by the Free Software Foundation. |
0f78b815 WD |
12 | * |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
e7c67065 | 18 | * You should have received a copy of the GNU General Public License along |
4fd842f9 | 19 | * with this program; if not, visit the http://fsf.org website. |
0f78b815 | 20 | */ |
31e12522 AT |
21 | |
22 | #include "rsync.h" | |
23 | ||
4f5b0756 | 24 | #if !defined MKNOD_CREATES_SOCKETS && defined HAVE_SYS_UN_H |
da6eb9d1 WD |
25 | #include <sys/un.h> |
26 | #endif | |
27 | ||
31e12522 | 28 | extern int dry_run; |
9439c0cb | 29 | extern int am_root; |
f0fca04e | 30 | extern int read_only; |
2b086e03 | 31 | extern int list_only; |
f0b4fdaf | 32 | extern int preserve_perms; |
f0fca04e | 33 | |
cfeed4da WD |
34 | #define RETURN_ERROR_IF(x,e) \ |
35 | do { \ | |
36 | if (x) { \ | |
37 | errno = (e); \ | |
38 | return -1; \ | |
39 | } \ | |
40 | } while (0) | |
41 | ||
42 | #define RETURN_ERROR_IF_RO_OR_LO RETURN_ERROR_IF(read_only || list_only, EROFS) | |
31e12522 | 43 | |
63cf5ae7 | 44 | int do_unlink(const char *fname) |
31e12522 AT |
45 | { |
46 | if (dry_run) return 0; | |
cfeed4da | 47 | RETURN_ERROR_IF_RO_OR_LO; |
31e12522 AT |
48 | return unlink(fname); |
49 | } | |
50 | ||
63cf5ae7 | 51 | int do_symlink(const char *fname1, const char *fname2) |
31e12522 AT |
52 | { |
53 | if (dry_run) return 0; | |
cfeed4da | 54 | RETURN_ERROR_IF_RO_OR_LO; |
31e12522 AT |
55 | return symlink(fname1, fname2); |
56 | } | |
57 | ||
4f5b0756 | 58 | #ifdef HAVE_LINK |
63cf5ae7 | 59 | int do_link(const char *fname1, const char *fname2) |
31e12522 AT |
60 | { |
61 | if (dry_run) return 0; | |
cfeed4da | 62 | RETURN_ERROR_IF_RO_OR_LO; |
31e12522 AT |
63 | return link(fname1, fname2); |
64 | } | |
f92ef572 | 65 | #endif |
31e12522 | 66 | |
7308bd66 AT |
67 | int do_lchown(const char *path, uid_t owner, gid_t group) |
68 | { | |
69 | if (dry_run) return 0; | |
cfeed4da | 70 | RETURN_ERROR_IF_RO_OR_LO; |
4f5b0756 | 71 | #ifndef HAVE_LCHOWN |
05154760 WD |
72 | #define lchown chown |
73 | #endif | |
7308bd66 AT |
74 | return lchown(path, owner, group); |
75 | } | |
76 | ||
4a19c3b2 | 77 | int do_mknod(const char *pathname, mode_t mode, dev_t dev) |
31e12522 AT |
78 | { |
79 | if (dry_run) return 0; | |
cfeed4da | 80 | RETURN_ERROR_IF_RO_OR_LO; |
9439c0cb WD |
81 | |
82 | /* For --fake-super, we create a normal file with mode 0600. */ | |
83 | if (am_root < 0) { | |
84 | int fd = open(pathname, O_WRONLY|O_CREAT|O_TRUNC, S_IWUSR|S_IRUSR); | |
85 | if (fd < 0 || close(fd) < 0) | |
86 | return -1; | |
87 | return 0; | |
88 | } | |
89 | ||
4f5b0756 | 90 | #if !defined MKNOD_CREATES_FIFOS && defined HAVE_MKFIFO |
da6eb9d1 WD |
91 | if (S_ISFIFO(mode)) |
92 | return mkfifo(pathname, mode); | |
93 | #endif | |
4f5b0756 | 94 | #if !defined MKNOD_CREATES_SOCKETS && defined HAVE_SYS_UN_H |
da6eb9d1 WD |
95 | if (S_ISSOCK(mode)) { |
96 | int sock; | |
97 | struct sockaddr_un saddr; | |
4f375592 WD |
98 | #ifdef HAVE_SOCKADDR_UN_LEN |
99 | unsigned int len = | |
100 | #endif | |
101 | strlcpy(saddr.sun_path, pathname, sizeof saddr.sun_path); | |
4f5b0756 | 102 | #ifdef HAVE_SOCKADDR_UN_LEN |
da6eb9d1 WD |
103 | saddr.sun_len = len >= sizeof saddr.sun_path |
104 | ? sizeof saddr.sun_path : len + 1; | |
105 | #endif | |
4f375592 | 106 | saddr.sun_family = AF_UNIX; |
da6eb9d1 WD |
107 | |
108 | if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0 | |
109 | || (unlink(pathname) < 0 && errno != ENOENT) | |
110 | || (bind(sock, (struct sockaddr*)&saddr, sizeof saddr)) < 0) | |
111 | return -1; | |
112 | close(sock); | |
d11f5c6e | 113 | #ifdef HAVE_CHMOD |
4fd842f9 | 114 | return do_chmod(pathname, mode); |
d11f5c6e WD |
115 | #else |
116 | return 0; | |
117 | #endif | |
da6eb9d1 WD |
118 | } |
119 | #endif | |
4f5b0756 | 120 | #ifdef HAVE_MKNOD |
31e12522 | 121 | return mknod(pathname, mode, dev); |
da6eb9d1 WD |
122 | #else |
123 | return -1; | |
f92ef572 | 124 | #endif |
da6eb9d1 | 125 | } |
31e12522 | 126 | |
63cf5ae7 | 127 | int do_rmdir(const char *pathname) |
31e12522 AT |
128 | { |
129 | if (dry_run) return 0; | |
cfeed4da | 130 | RETURN_ERROR_IF_RO_OR_LO; |
31e12522 AT |
131 | return rmdir(pathname); |
132 | } | |
133 | ||
63cf5ae7 | 134 | int do_open(const char *pathname, int flags, mode_t mode) |
31e12522 | 135 | { |
3420c8e6 | 136 | if (flags != O_RDONLY) { |
7a27e9b5 | 137 | RETURN_ERROR_IF(dry_run, 0); |
cfeed4da | 138 | RETURN_ERROR_IF_RO_OR_LO; |
3420c8e6 | 139 | } |
b0f3f578 | 140 | |
e106de49 | 141 | return open(pathname, flags | O_BINARY, mode); |
31e12522 | 142 | } |
7308bd66 | 143 | |
4f5b0756 | 144 | #ifdef HAVE_CHMOD |
7308bd66 AT |
145 | int do_chmod(const char *path, mode_t mode) |
146 | { | |
f0b4fdaf | 147 | int code; |
7308bd66 | 148 | if (dry_run) return 0; |
cfeed4da | 149 | RETURN_ERROR_IF_RO_OR_LO; |
d11f5c6e WD |
150 | if (S_ISLNK(mode)) { |
151 | #ifdef HAVE_LCHMOD | |
152 | code = lchmod(path, mode & CHMOD_BITS); | |
153 | #else | |
154 | code = 1; | |
155 | #endif | |
156 | } else | |
157 | code = chmod(path, mode & CHMOD_BITS); | |
cfeed4da | 158 | if (code != 0 && preserve_perms) |
f0b4fdaf DD |
159 | return code; |
160 | return 0; | |
7308bd66 | 161 | } |
f92ef572 | 162 | #endif |
1b2d733a | 163 | |
63cf5ae7 | 164 | int do_rename(const char *fname1, const char *fname2) |
1b2d733a AT |
165 | { |
166 | if (dry_run) return 0; | |
cfeed4da | 167 | RETURN_ERROR_IF_RO_OR_LO; |
1b2d733a AT |
168 | return rename(fname1, fname2); |
169 | } | |
170 | ||
bf4e725d MP |
171 | void trim_trailing_slashes(char *name) |
172 | { | |
c127e8aa | 173 | int l; |
bf4e725d MP |
174 | /* Some BSD systems cannot make a directory if the name |
175 | * contains a trailing slash. | |
176 | * <http://www.opensource.apple.com/bugs/X/BSD%20Kernel/2734739.html> */ | |
0f78b815 | 177 | |
c127e8aa MP |
178 | /* Don't change empty string; and also we can't improve on |
179 | * "/" */ | |
0f78b815 | 180 | |
c127e8aa MP |
181 | l = strlen(name); |
182 | while (l > 1) { | |
183 | if (name[--l] != '/') | |
184 | break; | |
185 | name[l] = '\0'; | |
bf4e725d MP |
186 | } |
187 | } | |
188 | ||
1b2d733a AT |
189 | int do_mkdir(char *fname, mode_t mode) |
190 | { | |
cfeed4da WD |
191 | if (dry_run) return 0; |
192 | RETURN_ERROR_IF_RO_OR_LO; | |
0f78b815 | 193 | trim_trailing_slashes(fname); |
1b2d733a AT |
194 | return mkdir(fname, mode); |
195 | } | |
196 | ||
f62c17e3 AT |
197 | /* like mkstemp but forces permissions */ |
198 | int do_mkstemp(char *template, mode_t perms) | |
199 | { | |
7a27e9b5 | 200 | RETURN_ERROR_IF(dry_run, 0); |
cfeed4da | 201 | RETURN_ERROR_IF(read_only, EROFS); |
f62c17e3 | 202 | |
4f5b0756 | 203 | #if defined HAVE_SECURE_MKSTEMP && defined HAVE_FCHMOD && (!defined HAVE_OPEN64 || defined HAVE_MKSTEMP64) |
f62c17e3 AT |
204 | { |
205 | int fd = mkstemp(template); | |
cfeed4da WD |
206 | if (fd == -1) |
207 | return -1; | |
208 | if (fchmod(fd, perms) != 0 && preserve_perms) { | |
209 | int errno_save = errno; | |
f62c17e3 AT |
210 | close(fd); |
211 | unlink(template); | |
cfeed4da | 212 | errno = errno_save; |
f62c17e3 AT |
213 | return -1; |
214 | } | |
4f5b0756 | 215 | #if defined HAVE_SETMODE && O_BINARY |
3267d6a9 WD |
216 | setmode(fd, O_BINARY); |
217 | #endif | |
f62c17e3 AT |
218 | return fd; |
219 | } | |
220 | #else | |
cfeed4da WD |
221 | if (!mktemp(template)) |
222 | return -1; | |
25f2cb3d | 223 | return do_open(template, O_RDWR|O_EXCL|O_CREAT, perms); |
f62c17e3 | 224 | #endif |
1b2d733a | 225 | } |
bcacc18b AT |
226 | |
227 | int do_stat(const char *fname, STRUCT_STAT *st) | |
228 | { | |
4f5b0756 | 229 | #ifdef USE_STAT64_FUNCS |
bcacc18b AT |
230 | return stat64(fname, st); |
231 | #else | |
232 | return stat(fname, st); | |
233 | #endif | |
234 | } | |
235 | ||
236 | int do_lstat(const char *fname, STRUCT_STAT *st) | |
237 | { | |
4f5b0756 WD |
238 | #ifdef SUPPORT_LINKS |
239 | # ifdef USE_STAT64_FUNCS | |
bcacc18b | 240 | return lstat64(fname, st); |
0957a746 | 241 | # else |
bcacc18b | 242 | return lstat(fname, st); |
0957a746 WD |
243 | # endif |
244 | #else | |
245 | return do_stat(fname, st); | |
bcacc18b AT |
246 | #endif |
247 | } | |
248 | ||
249 | int do_fstat(int fd, STRUCT_STAT *st) | |
250 | { | |
4f5b0756 | 251 | #ifdef USE_STAT64_FUNCS |
bcacc18b AT |
252 | return fstat64(fd, st); |
253 | #else | |
254 | return fstat(fd, st); | |
255 | #endif | |
256 | } | |
73233f0f AT |
257 | |
258 | OFF_T do_lseek(int fd, OFF_T offset, int whence) | |
259 | { | |
ebd33e0c | 260 | #ifdef HAVE_LSEEK64 |
f853b777 WD |
261 | #if !SIZEOF_OFF64_T |
262 | OFF_T lseek64(); | |
263 | #else | |
f28ee65b | 264 | off64_t lseek64(); |
f853b777 | 265 | #endif |
73233f0f AT |
266 | return lseek64(fd, offset, whence); |
267 | #else | |
268 | return lseek(fd, offset, whence); | |
269 | #endif | |
270 | } | |
d6e6ecbd AT |
271 | |
272 | char *d_name(struct dirent *di) | |
273 | { | |
4f5b0756 | 274 | #ifdef HAVE_BROKEN_READDIR |
59503278 AT |
275 | return (di->d_name - 2); |
276 | #else | |
d6e6ecbd | 277 | return di->d_name; |
59503278 | 278 | #endif |
d6e6ecbd | 279 | } |