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 2 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, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
25 #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;
81 #if !defined MKNOD_CREATES_FIFOS && defined HAVE_MKFIFO
83 return mkfifo(pathname, mode);
85 #if !defined MKNOD_CREATES_SOCKETS && defined HAVE_SYS_UN_H
88 struct sockaddr_un saddr;
89 #ifdef HAVE_SOCKADDR_UN_LEN
92 strlcpy(saddr.sun_path, pathname, sizeof saddr.sun_path);
93 #ifdef HAVE_SOCKADDR_UN_LEN
94 saddr.sun_len = len >= sizeof saddr.sun_path
95 ? sizeof saddr.sun_path : len + 1;
97 saddr.sun_family = AF_UNIX;
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)
105 return do_chmod(pathname, mode);
112 return mknod(pathname, mode, dev);
118 int do_rmdir(const char *pathname)
120 if (dry_run) return 0;
121 RETURN_ERROR_IF_RO_OR_LO;
122 return rmdir(pathname);
125 int do_open(const char *pathname, int flags, mode_t mode)
127 if (flags != O_RDONLY) {
128 RETURN_ERROR_IF(dry_run, 0);
129 RETURN_ERROR_IF_RO_OR_LO;
132 return open(pathname, flags | O_BINARY, mode);
136 int do_chmod(const char *path, mode_t mode)
139 if (dry_run) return 0;
140 RETURN_ERROR_IF_RO_OR_LO;
143 code = lchmod(path, mode & CHMOD_BITS);
148 code = chmod(path, mode & CHMOD_BITS);
149 if (code != 0 && preserve_perms)
155 int do_rename(const char *fname1, const char *fname2)
157 if (dry_run) return 0;
158 RETURN_ERROR_IF_RO_OR_LO;
159 return rename(fname1, fname2);
162 void trim_trailing_slashes(char *name)
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> */
169 /* Don't change empty string; and also we can't improve on
174 if (name[--l] != '/')
180 int do_mkdir(char *fname, mode_t mode)
182 if (dry_run) return 0;
183 RETURN_ERROR_IF_RO_OR_LO;
184 trim_trailing_slashes(fname);
185 return mkdir(fname, mode);
188 /* like mkstemp but forces permissions */
189 int do_mkstemp(char *template, mode_t perms)
191 RETURN_ERROR_IF(dry_run, 0);
192 RETURN_ERROR_IF(read_only, EROFS);
194 #if defined HAVE_SECURE_MKSTEMP && defined HAVE_FCHMOD && (!defined HAVE_OPEN64 || defined HAVE_MKSTEMP64)
196 int fd = mkstemp(template);
199 if (fchmod(fd, perms) != 0 && preserve_perms) {
200 int errno_save = errno;
206 #if defined HAVE_SETMODE && O_BINARY
207 setmode(fd, O_BINARY);
212 if (!mktemp(template))
214 return do_open(template, O_RDWR|O_EXCL|O_CREAT, perms);
218 int do_stat(const char *fname, STRUCT_STAT *st)
220 #ifdef USE_STAT64_FUNCS
221 return stat64(fname, st);
223 return stat(fname, st);
227 int do_lstat(const char *fname, STRUCT_STAT *st)
230 # ifdef USE_STAT64_FUNCS
231 return lstat64(fname, st);
233 return lstat(fname, st);
236 return do_stat(fname, st);
240 int do_fstat(int fd, STRUCT_STAT *st)
242 #ifdef USE_STAT64_FUNCS
243 return fstat64(fd, st);
245 return fstat(fd, st);
249 OFF_T do_lseek(int fd, OFF_T offset, int whence)
257 return lseek64(fd, offset, whence);
259 return lseek(fd, offset, whence);
263 char *d_name(struct dirent *di)
265 #ifdef HAVE_BROKEN_READDIR
266 return (di->d_name - 2);