2 * Syscall wrappers to ensure that nothing gets done in dry_run mode
3 * and to handle system peculiarities.
5 * Copyright (C) 1998 Andrew Tridgell
6 * Copyright (C) 2002 Martin Pool
7 * Copyright (C) 2003, 2004, 2005, 2006 Wayne Davison
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.
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.
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.
26 #if !defined MKNOD_CREATES_SOCKETS && defined HAVE_SYS_UN_H
33 extern int preserve_perms;
35 #define RETURN_ERROR_IF(x,e) \
43 #define RETURN_ERROR_IF_RO_OR_LO RETURN_ERROR_IF(read_only || list_only, EROFS)
45 int do_unlink(const char *fname)
47 if (dry_run) return 0;
48 RETURN_ERROR_IF_RO_OR_LO;
52 int do_symlink(const char *fname1, const char *fname2)
54 if (dry_run) return 0;
55 RETURN_ERROR_IF_RO_OR_LO;
56 return symlink(fname1, fname2);
60 int do_link(const char *fname1, const char *fname2)
62 if (dry_run) return 0;
63 RETURN_ERROR_IF_RO_OR_LO;
64 return link(fname1, fname2);
68 int do_lchown(const char *path, uid_t owner, gid_t group)
70 if (dry_run) return 0;
71 RETURN_ERROR_IF_RO_OR_LO;
75 return lchown(path, owner, group);
78 int do_mknod(const char *pathname, mode_t mode, dev_t dev)
80 if (dry_run) return 0;
81 RETURN_ERROR_IF_RO_OR_LO;
82 #if !defined MKNOD_CREATES_FIFOS && defined HAVE_MKFIFO
84 return mkfifo(pathname, mode);
86 #if !defined MKNOD_CREATES_SOCKETS && defined HAVE_SYS_UN_H
89 struct sockaddr_un saddr;
90 #ifdef HAVE_SOCKADDR_UN_LEN
93 strlcpy(saddr.sun_path, pathname, sizeof saddr.sun_path);
94 #ifdef HAVE_SOCKADDR_UN_LEN
95 saddr.sun_len = len >= sizeof saddr.sun_path
96 ? sizeof saddr.sun_path : len + 1;
98 saddr.sun_family = AF_UNIX;
100 if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0
101 || (unlink(pathname) < 0 && errno != ENOENT)
102 || (bind(sock, (struct sockaddr*)&saddr, sizeof saddr)) < 0)
106 return do_chmod(pathname, mode);
113 return mknod(pathname, mode, dev);
119 int do_rmdir(const char *pathname)
121 if (dry_run) return 0;
122 RETURN_ERROR_IF_RO_OR_LO;
123 return rmdir(pathname);
126 int do_open(const char *pathname, int flags, mode_t mode)
128 if (flags != O_RDONLY) {
129 RETURN_ERROR_IF(dry_run, 0);
130 RETURN_ERROR_IF_RO_OR_LO;
133 return open(pathname, flags | O_BINARY, mode);
137 int do_chmod(const char *path, mode_t mode)
140 if (dry_run) return 0;
141 RETURN_ERROR_IF_RO_OR_LO;
144 code = lchmod(path, mode & CHMOD_BITS);
149 code = chmod(path, mode & CHMOD_BITS);
150 if (code != 0 && preserve_perms)
156 int do_rename(const char *fname1, const char *fname2)
158 if (dry_run) return 0;
159 RETURN_ERROR_IF_RO_OR_LO;
160 return rename(fname1, fname2);
163 void trim_trailing_slashes(char *name)
166 /* Some BSD systems cannot make a directory if the name
167 * contains a trailing slash.
168 * <http://www.opensource.apple.com/bugs/X/BSD%20Kernel/2734739.html> */
170 /* Don't change empty string; and also we can't improve on
175 if (name[--l] != '/')
181 int do_mkdir(char *fname, mode_t mode)
183 if (dry_run) return 0;
184 RETURN_ERROR_IF_RO_OR_LO;
185 trim_trailing_slashes(fname);
186 return mkdir(fname, mode);
189 /* like mkstemp but forces permissions */
190 int do_mkstemp(char *template, mode_t perms)
192 RETURN_ERROR_IF(dry_run, 0);
193 RETURN_ERROR_IF(read_only, EROFS);
195 #if defined HAVE_SECURE_MKSTEMP && defined HAVE_FCHMOD && (!defined HAVE_OPEN64 || defined HAVE_MKSTEMP64)
197 int fd = mkstemp(template);
200 if (fchmod(fd, perms) != 0 && preserve_perms) {
201 int errno_save = errno;
207 #if defined HAVE_SETMODE && O_BINARY
208 setmode(fd, O_BINARY);
213 if (!mktemp(template))
215 return do_open(template, O_RDWR|O_EXCL|O_CREAT, perms);
219 int do_stat(const char *fname, STRUCT_STAT *st)
221 #ifdef USE_STAT64_FUNCS
222 return stat64(fname, st);
224 return stat(fname, st);
228 int do_lstat(const char *fname, STRUCT_STAT *st)
231 # ifdef USE_STAT64_FUNCS
232 return lstat64(fname, st);
234 return lstat(fname, st);
237 return do_stat(fname, st);
241 int do_fstat(int fd, STRUCT_STAT *st)
243 #ifdef USE_STAT64_FUNCS
244 return fstat64(fd, st);
246 return fstat(fd, st);
250 OFF_T do_lseek(int fd, OFF_T offset, int whence)
258 return lseek64(fd, offset, whence);
260 return lseek(fd, offset, whence);
264 char *d_name(struct dirent *di)
266 #ifdef HAVE_BROKEN_READDIR
267 return (di->d_name - 2);