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) 2003-2007 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 version 3 as
11 * published by the Free Software Foundation.
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.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, visit the http://fsf.org website.
24 #if !defined MKNOD_CREATES_SOCKETS && defined HAVE_SYS_UN_H
32 extern int preserve_perms;
34 #define RETURN_ERROR_IF(x,e) \
42 #define RETURN_ERROR_IF_RO_OR_LO RETURN_ERROR_IF(read_only || list_only, EROFS)
44 int do_unlink(const char *fname)
46 if (dry_run) return 0;
47 RETURN_ERROR_IF_RO_OR_LO;
51 int do_symlink(const char *fname1, const char *fname2)
53 if (dry_run) return 0;
54 RETURN_ERROR_IF_RO_OR_LO;
55 return symlink(fname1, fname2);
59 int do_link(const char *fname1, const char *fname2)
61 if (dry_run) return 0;
62 RETURN_ERROR_IF_RO_OR_LO;
63 return link(fname1, fname2);
67 int do_lchown(const char *path, uid_t owner, gid_t group)
69 if (dry_run) return 0;
70 RETURN_ERROR_IF_RO_OR_LO;
74 return lchown(path, owner, group);
77 int do_mknod(const char *pathname, mode_t mode, dev_t dev)
79 if (dry_run) return 0;
80 RETURN_ERROR_IF_RO_OR_LO;
82 /* For --fake-super, we create a normal file with mode 0600. */
84 int fd = open(pathname, O_WRONLY|O_CREAT|O_TRUNC, S_IWUSR|S_IRUSR);
85 if (fd < 0 || close(fd) < 0)
90 #if !defined MKNOD_CREATES_FIFOS && defined HAVE_MKFIFO
92 return mkfifo(pathname, mode);
94 #if !defined MKNOD_CREATES_SOCKETS && defined HAVE_SYS_UN_H
97 struct sockaddr_un saddr;
98 #ifdef HAVE_SOCKADDR_UN_LEN
101 strlcpy(saddr.sun_path, pathname, sizeof saddr.sun_path);
102 #ifdef HAVE_SOCKADDR_UN_LEN
103 saddr.sun_len = len >= sizeof saddr.sun_path
104 ? sizeof saddr.sun_path : len + 1;
106 saddr.sun_family = AF_UNIX;
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)
114 return do_chmod(pathname, mode);
121 return mknod(pathname, mode, dev);
127 int do_rmdir(const char *pathname)
129 if (dry_run) return 0;
130 RETURN_ERROR_IF_RO_OR_LO;
131 return rmdir(pathname);
134 int do_open(const char *pathname, int flags, mode_t mode)
136 if (flags != O_RDONLY) {
137 RETURN_ERROR_IF(dry_run, 0);
138 RETURN_ERROR_IF_RO_OR_LO;
141 return open(pathname, flags | O_BINARY, mode);
145 int do_chmod(const char *path, mode_t mode)
148 if (dry_run) return 0;
149 RETURN_ERROR_IF_RO_OR_LO;
152 code = lchmod(path, mode & CHMOD_BITS);
157 code = chmod(path, mode & CHMOD_BITS);
158 if (code != 0 && preserve_perms)
164 int do_rename(const char *fname1, const char *fname2)
166 if (dry_run) return 0;
167 RETURN_ERROR_IF_RO_OR_LO;
168 return rename(fname1, fname2);
171 void trim_trailing_slashes(char *name)
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> */
178 /* Don't change empty string; and also we can't improve on
183 if (name[--l] != '/')
189 int do_mkdir(char *fname, mode_t mode)
191 if (dry_run) return 0;
192 RETURN_ERROR_IF_RO_OR_LO;
193 trim_trailing_slashes(fname);
194 return mkdir(fname, mode);
197 /* like mkstemp but forces permissions */
198 int do_mkstemp(char *template, mode_t perms)
200 RETURN_ERROR_IF(dry_run, 0);
201 RETURN_ERROR_IF(read_only, EROFS);
203 #if defined HAVE_SECURE_MKSTEMP && defined HAVE_FCHMOD && (!defined HAVE_OPEN64 || defined HAVE_MKSTEMP64)
205 int fd = mkstemp(template);
208 if (fchmod(fd, perms) != 0 && preserve_perms) {
209 int errno_save = errno;
215 #if defined HAVE_SETMODE && O_BINARY
216 setmode(fd, O_BINARY);
221 if (!mktemp(template))
223 return do_open(template, O_RDWR|O_EXCL|O_CREAT, perms);
227 int do_stat(const char *fname, STRUCT_STAT *st)
229 #ifdef USE_STAT64_FUNCS
230 return stat64(fname, st);
232 return stat(fname, st);
236 int do_lstat(const char *fname, STRUCT_STAT *st)
239 # ifdef USE_STAT64_FUNCS
240 return lstat64(fname, st);
242 return lstat(fname, st);
245 return do_stat(fname, st);
249 int do_fstat(int fd, STRUCT_STAT *st)
251 #ifdef USE_STAT64_FUNCS
252 return fstat64(fd, st);
254 return fstat(fd, st);
258 OFF_T do_lseek(int fd, OFF_T offset, int whence)
266 return lseek64(fd, offset, whence);
268 return lseek(fd, offset, whence);
272 char *d_name(struct dirent *di)
274 #ifdef HAVE_BROKEN_READDIR
275 return (di->d_name - 2);