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 as published by
11 * the Free Software Foundation; either version 3 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, visit the http://fsf.org website.
25 #if !defined MKNOD_CREATES_SOCKETS && defined HAVE_SYS_UN_H
28 #ifdef HAVE_SYS_ATTR_H
36 extern int preserve_perms;
38 #define RETURN_ERROR_IF(x,e) \
46 #define RETURN_ERROR_IF_RO_OR_LO RETURN_ERROR_IF(read_only || list_only, EROFS)
48 int do_unlink(const char *fname)
50 if (dry_run) return 0;
51 RETURN_ERROR_IF_RO_OR_LO;
55 int do_symlink(const char *fname1, const char *fname2)
57 if (dry_run) return 0;
58 RETURN_ERROR_IF_RO_OR_LO;
59 return symlink(fname1, fname2);
63 int do_link(const char *fname1, const char *fname2)
65 if (dry_run) return 0;
66 RETURN_ERROR_IF_RO_OR_LO;
67 return link(fname1, fname2);
71 int do_lchown(const char *path, uid_t owner, gid_t group)
73 if (dry_run) return 0;
74 RETURN_ERROR_IF_RO_OR_LO;
78 return lchown(path, owner, group);
81 int do_mknod(const char *pathname, mode_t mode, dev_t dev)
83 if (dry_run) return 0;
84 RETURN_ERROR_IF_RO_OR_LO;
86 /* For --fake-super, we create a normal file with mode 0600. */
88 int fd = open(pathname, O_WRONLY|O_CREAT|O_TRUNC, S_IWUSR|S_IRUSR);
89 if (fd < 0 || close(fd) < 0)
94 #if !defined MKNOD_CREATES_FIFOS && defined HAVE_MKFIFO
96 return mkfifo(pathname, mode);
98 #if !defined MKNOD_CREATES_SOCKETS && defined HAVE_SYS_UN_H
101 struct sockaddr_un saddr;
102 #ifdef HAVE_SOCKADDR_UN_LEN
105 strlcpy(saddr.sun_path, pathname, sizeof saddr.sun_path);
106 #ifdef HAVE_SOCKADDR_UN_LEN
107 saddr.sun_len = len >= sizeof saddr.sun_path
108 ? sizeof saddr.sun_path : len + 1;
110 saddr.sun_family = AF_UNIX;
112 if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0
113 || (unlink(pathname) < 0 && errno != ENOENT)
114 || (bind(sock, (struct sockaddr*)&saddr, sizeof saddr)) < 0)
118 return do_chmod(pathname, mode);
125 return mknod(pathname, mode, dev);
131 int do_rmdir(const char *pathname)
133 if (dry_run) return 0;
134 RETURN_ERROR_IF_RO_OR_LO;
135 return rmdir(pathname);
138 int do_open(const char *pathname, int flags, mode_t mode)
140 if (flags != O_RDONLY) {
141 RETURN_ERROR_IF(dry_run, 0);
142 RETURN_ERROR_IF_RO_OR_LO;
145 return open(pathname, flags | O_BINARY, mode);
149 int do_chmod(const char *path, mode_t mode)
152 if (dry_run) return 0;
153 RETURN_ERROR_IF_RO_OR_LO;
156 code = lchmod(path, mode & CHMOD_BITS);
157 #elif defined HAVE_SETATTRLIST
158 struct attrlist attrList;
159 uint32_t m = mode & CHMOD_BITS; /* manpage is wrong: not mode_t! */
161 memset(&attrList, 0, sizeof attrList);
162 attrList.bitmapcount = ATTR_BIT_MAP_COUNT;
163 attrList.commonattr = ATTR_CMN_ACCESSMASK;
164 code = setattrlist(path, &attrList, &m, sizeof m, FSOPT_NOFOLLOW);
169 code = chmod(path, mode & CHMOD_BITS);
170 if (code != 0 && preserve_perms)
176 int do_rename(const char *fname1, const char *fname2)
178 if (dry_run) return 0;
179 RETURN_ERROR_IF_RO_OR_LO;
180 return rename(fname1, fname2);
183 void trim_trailing_slashes(char *name)
186 /* Some BSD systems cannot make a directory if the name
187 * contains a trailing slash.
188 * <http://www.opensource.apple.com/bugs/X/BSD%20Kernel/2734739.html> */
190 /* Don't change empty string; and also we can't improve on
195 if (name[--l] != '/')
201 int do_mkdir(char *fname, mode_t mode)
203 if (dry_run) return 0;
204 RETURN_ERROR_IF_RO_OR_LO;
205 trim_trailing_slashes(fname);
206 return mkdir(fname, mode);
209 /* like mkstemp but forces permissions */
210 int do_mkstemp(char *template, mode_t perms)
212 RETURN_ERROR_IF(dry_run, 0);
213 RETURN_ERROR_IF(read_only, EROFS);
215 #if defined HAVE_SECURE_MKSTEMP && defined HAVE_FCHMOD && (!defined HAVE_OPEN64 || defined HAVE_MKSTEMP64)
217 int fd = mkstemp(template);
220 if (fchmod(fd, perms) != 0 && preserve_perms) {
221 int errno_save = errno;
227 #if defined HAVE_SETMODE && O_BINARY
228 setmode(fd, O_BINARY);
233 if (!mktemp(template))
235 return do_open(template, O_RDWR|O_EXCL|O_CREAT, perms);
239 int do_stat(const char *fname, STRUCT_STAT *st)
241 #ifdef USE_STAT64_FUNCS
242 return stat64(fname, st);
244 return stat(fname, st);
248 int do_lstat(const char *fname, STRUCT_STAT *st)
251 # ifdef USE_STAT64_FUNCS
252 return lstat64(fname, st);
254 return lstat(fname, st);
257 return do_stat(fname, st);
261 int do_fstat(int fd, STRUCT_STAT *st)
263 #ifdef USE_STAT64_FUNCS
264 return fstat64(fd, st);
266 return fstat(fd, st);
270 OFF_T do_lseek(int fd, OFF_T offset, int whence)
278 return lseek64(fd, offset, whence);
280 return lseek(fd, offset, whence);
284 char *d_name(struct dirent *di)
286 #ifdef HAVE_BROKEN_READDIR
287 return (di->d_name - 2);