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
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;
83 /* For --fake-super, we create a normal file with mode 0600. */
85 int fd = open(pathname, O_WRONLY|O_CREAT|O_TRUNC, S_IWUSR|S_IRUSR);
86 if (fd < 0 || close(fd) < 0)
91 #if !defined MKNOD_CREATES_FIFOS && defined HAVE_MKFIFO
93 return mkfifo(pathname, mode);
95 #if !defined MKNOD_CREATES_SOCKETS && defined HAVE_SYS_UN_H
98 struct sockaddr_un saddr;
99 #ifdef HAVE_SOCKADDR_UN_LEN
102 strlcpy(saddr.sun_path, pathname, sizeof saddr.sun_path);
103 #ifdef HAVE_SOCKADDR_UN_LEN
104 saddr.sun_len = len >= sizeof saddr.sun_path
105 ? sizeof saddr.sun_path : len + 1;
107 saddr.sun_family = AF_UNIX;
109 if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0
110 || (unlink(pathname) < 0 && errno != ENOENT)
111 || (bind(sock, (struct sockaddr*)&saddr, sizeof saddr)) < 0)
115 return do_chmod(pathname, mode);
122 return mknod(pathname, mode, dev);
128 int do_rmdir(const char *pathname)
130 if (dry_run) return 0;
131 RETURN_ERROR_IF_RO_OR_LO;
132 return rmdir(pathname);
135 int do_open(const char *pathname, int flags, mode_t mode)
137 if (flags != O_RDONLY) {
138 RETURN_ERROR_IF(dry_run, 0);
139 RETURN_ERROR_IF_RO_OR_LO;
142 return open(pathname, flags | O_BINARY, mode);
146 int do_chmod(const char *path, mode_t mode)
149 if (dry_run) return 0;
150 RETURN_ERROR_IF_RO_OR_LO;
153 code = lchmod(path, mode & CHMOD_BITS);
158 code = chmod(path, mode & CHMOD_BITS);
159 if (code != 0 && preserve_perms)
165 int do_rename(const char *fname1, const char *fname2)
167 if (dry_run) return 0;
168 RETURN_ERROR_IF_RO_OR_LO;
169 return rename(fname1, fname2);
172 void trim_trailing_slashes(char *name)
175 /* Some BSD systems cannot make a directory if the name
176 * contains a trailing slash.
177 * <http://www.opensource.apple.com/bugs/X/BSD%20Kernel/2734739.html> */
179 /* Don't change empty string; and also we can't improve on
184 if (name[--l] != '/')
190 int do_mkdir(char *fname, mode_t mode)
192 if (dry_run) return 0;
193 RETURN_ERROR_IF_RO_OR_LO;
194 trim_trailing_slashes(fname);
195 return mkdir(fname, mode);
198 /* like mkstemp but forces permissions */
199 int do_mkstemp(char *template, mode_t perms)
201 RETURN_ERROR_IF(dry_run, 0);
202 RETURN_ERROR_IF(read_only, EROFS);
204 #if defined HAVE_SECURE_MKSTEMP && defined HAVE_FCHMOD && (!defined HAVE_OPEN64 || defined HAVE_MKSTEMP64)
206 int fd = mkstemp(template);
209 if (fchmod(fd, perms) != 0 && preserve_perms) {
210 int errno_save = errno;
216 #if defined HAVE_SETMODE && O_BINARY
217 setmode(fd, O_BINARY);
222 if (!mktemp(template))
224 return do_open(template, O_RDWR|O_EXCL|O_CREAT, perms);
228 int do_stat(const char *fname, STRUCT_STAT *st)
230 #ifdef USE_STAT64_FUNCS
231 return stat64(fname, st);
233 return stat(fname, st);
237 int do_lstat(const char *fname, STRUCT_STAT *st)
240 # ifdef USE_STAT64_FUNCS
241 return lstat64(fname, st);
243 return lstat(fname, st);
246 return do_stat(fname, st);
250 int do_fstat(int fd, STRUCT_STAT *st)
252 #ifdef USE_STAT64_FUNCS
253 return fstat64(fd, st);
255 return fstat(fd, st);
259 OFF_T do_lseek(int fd, OFF_T offset, int whence)
267 return lseek64(fd, offset, whence);
269 return lseek(fd, offset, whence);
273 char *d_name(struct dirent *di)
275 #ifdef HAVE_BROKEN_READDIR
276 return (di->d_name - 2);