Commit | Line | Data |
---|---|---|
31e12522 AT |
1 | /* |
2 | Copyright (C) Andrew Tridgell 1998 | |
ded8347d | 3 | Copyright (C) 2002 by Martin Pool |
31e12522 AT |
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 | ||
ded8347d MP |
20 | /** |
21 | * @file syscall.c | |
22 | * | |
23 | * Syscall wrappers to ensure that nothing gets done in dry_run mode | |
24 | * and to handle system peculiarities. | |
25 | **/ | |
31e12522 AT |
26 | |
27 | #include "rsync.h" | |
28 | ||
da6eb9d1 WD |
29 | #if !MKNOD_CREATES_SOCKETS && HAVE_SYS_UN_H |
30 | #include <sys/un.h> | |
31 | #endif | |
32 | ||
31e12522 | 33 | extern int dry_run; |
f0fca04e | 34 | extern int read_only; |
2b086e03 | 35 | extern int list_only; |
f0b4fdaf | 36 | extern int preserve_perms; |
f0fca04e | 37 | |
cfeed4da WD |
38 | #define RETURN_ERROR_IF(x,e) \ |
39 | do { \ | |
40 | if (x) { \ | |
41 | errno = (e); \ | |
42 | return -1; \ | |
43 | } \ | |
44 | } while (0) | |
45 | ||
46 | #define RETURN_ERROR_IF_RO_OR_LO RETURN_ERROR_IF(read_only || list_only, EROFS) | |
31e12522 AT |
47 | |
48 | int do_unlink(char *fname) | |
49 | { | |
50 | if (dry_run) return 0; | |
cfeed4da | 51 | RETURN_ERROR_IF_RO_OR_LO; |
31e12522 AT |
52 | return unlink(fname); |
53 | } | |
54 | ||
55 | int do_symlink(char *fname1, char *fname2) | |
56 | { | |
57 | if (dry_run) return 0; | |
cfeed4da | 58 | RETURN_ERROR_IF_RO_OR_LO; |
31e12522 AT |
59 | return symlink(fname1, fname2); |
60 | } | |
61 | ||
f92ef572 | 62 | #if HAVE_LINK |
31e12522 AT |
63 | int do_link(char *fname1, char *fname2) |
64 | { | |
65 | if (dry_run) return 0; | |
cfeed4da | 66 | RETURN_ERROR_IF_RO_OR_LO; |
31e12522 AT |
67 | return link(fname1, fname2); |
68 | } | |
f92ef572 | 69 | #endif |
31e12522 | 70 | |
7308bd66 AT |
71 | int do_lchown(const char *path, uid_t owner, gid_t group) |
72 | { | |
73 | if (dry_run) return 0; | |
cfeed4da | 74 | RETURN_ERROR_IF_RO_OR_LO; |
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; |
da6eb9d1 WD |
82 | #if !MKNOD_CREATES_FIFOS && HAVE_MKFIFO |
83 | if (S_ISFIFO(mode)) | |
84 | return mkfifo(pathname, mode); | |
85 | #endif | |
86 | #if !MKNOD_CREATES_SOCKETS && HAVE_SYS_UN_H | |
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); | |
94 | #if HAVE_SOCKADDR_UN_LEN | |
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); | |
104 | return do_chmod(pathname, mode); | |
105 | } | |
106 | #endif | |
107 | #if HAVE_MKNOD | |
31e12522 | 108 | return mknod(pathname, mode, dev); |
da6eb9d1 WD |
109 | #else |
110 | return -1; | |
f92ef572 | 111 | #endif |
da6eb9d1 | 112 | } |
31e12522 AT |
113 | |
114 | int do_rmdir(char *pathname) | |
115 | { | |
116 | if (dry_run) return 0; | |
cfeed4da | 117 | RETURN_ERROR_IF_RO_OR_LO; |
31e12522 AT |
118 | return rmdir(pathname); |
119 | } | |
120 | ||
121 | int do_open(char *pathname, int flags, mode_t mode) | |
122 | { | |
3420c8e6 | 123 | if (flags != O_RDONLY) { |
7a27e9b5 | 124 | RETURN_ERROR_IF(dry_run, 0); |
cfeed4da | 125 | RETURN_ERROR_IF_RO_OR_LO; |
3420c8e6 | 126 | } |
b0f3f578 | 127 | |
e106de49 | 128 | return open(pathname, flags | O_BINARY, mode); |
31e12522 | 129 | } |
7308bd66 | 130 | |
f92ef572 | 131 | #if HAVE_CHMOD |
7308bd66 AT |
132 | int do_chmod(const char *path, mode_t mode) |
133 | { | |
f0b4fdaf | 134 | int code; |
7308bd66 | 135 | if (dry_run) return 0; |
cfeed4da | 136 | RETURN_ERROR_IF_RO_OR_LO; |
f0b4fdaf | 137 | code = chmod(path, mode); |
cfeed4da | 138 | if (code != 0 && preserve_perms) |
f0b4fdaf DD |
139 | return code; |
140 | return 0; | |
7308bd66 | 141 | } |
f92ef572 | 142 | #endif |
1b2d733a AT |
143 | |
144 | int do_rename(char *fname1, char *fname2) | |
145 | { | |
146 | if (dry_run) return 0; | |
cfeed4da | 147 | RETURN_ERROR_IF_RO_OR_LO; |
1b2d733a AT |
148 | return rename(fname1, fname2); |
149 | } | |
150 | ||
ded8347d | 151 | |
bf4e725d MP |
152 | void trim_trailing_slashes(char *name) |
153 | { | |
c127e8aa | 154 | int l; |
bf4e725d MP |
155 | /* Some BSD systems cannot make a directory if the name |
156 | * contains a trailing slash. | |
157 | * <http://www.opensource.apple.com/bugs/X/BSD%20Kernel/2734739.html> */ | |
c127e8aa MP |
158 | |
159 | /* Don't change empty string; and also we can't improve on | |
160 | * "/" */ | |
161 | ||
162 | l = strlen(name); | |
163 | while (l > 1) { | |
164 | if (name[--l] != '/') | |
165 | break; | |
166 | name[l] = '\0'; | |
bf4e725d MP |
167 | } |
168 | } | |
169 | ||
170 | ||
1b2d733a AT |
171 | int do_mkdir(char *fname, mode_t mode) |
172 | { | |
cfeed4da WD |
173 | if (dry_run) return 0; |
174 | RETURN_ERROR_IF_RO_OR_LO; | |
bf4e725d | 175 | trim_trailing_slashes(fname); |
1b2d733a AT |
176 | return mkdir(fname, mode); |
177 | } | |
178 | ||
ded8347d | 179 | |
f62c17e3 AT |
180 | /* like mkstemp but forces permissions */ |
181 | int do_mkstemp(char *template, mode_t perms) | |
182 | { | |
7a27e9b5 | 183 | RETURN_ERROR_IF(dry_run, 0); |
cfeed4da | 184 | RETURN_ERROR_IF(read_only, EROFS); |
f62c17e3 | 185 | |
6dcb9320 | 186 | #if HAVE_SECURE_MKSTEMP && HAVE_FCHMOD && (!HAVE_OPEN64 || HAVE_MKSTEMP64) |
f62c17e3 AT |
187 | { |
188 | int fd = mkstemp(template); | |
cfeed4da WD |
189 | if (fd == -1) |
190 | return -1; | |
191 | if (fchmod(fd, perms) != 0 && preserve_perms) { | |
192 | int errno_save = errno; | |
f62c17e3 AT |
193 | close(fd); |
194 | unlink(template); | |
cfeed4da | 195 | errno = errno_save; |
f62c17e3 AT |
196 | return -1; |
197 | } | |
3267d6a9 WD |
198 | #if HAVE_SETMODE && O_BINARY |
199 | setmode(fd, O_BINARY); | |
200 | #endif | |
f62c17e3 AT |
201 | return fd; |
202 | } | |
203 | #else | |
cfeed4da WD |
204 | if (!mktemp(template)) |
205 | return -1; | |
25f2cb3d | 206 | return do_open(template, O_RDWR|O_EXCL|O_CREAT, perms); |
f62c17e3 | 207 | #endif |
1b2d733a | 208 | } |
bcacc18b AT |
209 | |
210 | int do_stat(const char *fname, STRUCT_STAT *st) | |
211 | { | |
212 | #if HAVE_OFF64_T | |
213 | return stat64(fname, st); | |
214 | #else | |
215 | return stat(fname, st); | |
216 | #endif | |
217 | } | |
218 | ||
efb2f6bf | 219 | #if SUPPORT_LINKS |
bcacc18b AT |
220 | int do_lstat(const char *fname, STRUCT_STAT *st) |
221 | { | |
222 | #if HAVE_OFF64_T | |
223 | return lstat64(fname, st); | |
224 | #else | |
225 | return lstat(fname, st); | |
226 | #endif | |
227 | } | |
efb2f6bf | 228 | #endif |
bcacc18b AT |
229 | |
230 | int do_fstat(int fd, STRUCT_STAT *st) | |
231 | { | |
232 | #if HAVE_OFF64_T | |
233 | return fstat64(fd, st); | |
234 | #else | |
235 | return fstat(fd, st); | |
236 | #endif | |
237 | } | |
73233f0f AT |
238 | |
239 | OFF_T do_lseek(int fd, OFF_T offset, int whence) | |
240 | { | |
241 | #if HAVE_OFF64_T | |
f28ee65b | 242 | off64_t lseek64(); |
73233f0f AT |
243 | return lseek64(fd, offset, whence); |
244 | #else | |
245 | return lseek(fd, offset, whence); | |
246 | #endif | |
247 | } | |
d6e6ecbd | 248 | |
bb0f7089 | 249 | #ifdef USE_MMAP |
754d120c AT |
250 | void *do_mmap(void *start, int len, int prot, int flags, int fd, OFF_T offset) |
251 | { | |
252 | #if HAVE_OFF64_T | |
253 | return mmap64(start, len, prot, flags, fd, offset); | |
254 | #else | |
255 | return mmap(start, len, prot, flags, fd, offset); | |
256 | #endif | |
257 | } | |
258 | #endif | |
259 | ||
d6e6ecbd AT |
260 | char *d_name(struct dirent *di) |
261 | { | |
59503278 AT |
262 | #if HAVE_BROKEN_READDIR |
263 | return (di->d_name - 2); | |
264 | #else | |
d6e6ecbd | 265 | return di->d_name; |
59503278 | 266 | #endif |
d6e6ecbd | 267 | } |