-/*
- Copyright (C) Andrew Tridgell 1998
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
/*
- syscall wrappers to ensure that nothing gets done in dry_run mode
- */
+ * Syscall wrappers to ensure that nothing gets done in dry_run mode
+ * and to handle system peculiarities.
+ *
+ * Copyright (C) 1998 Andrew Tridgell
+ * Copyright (C) 2002 Martin Pool
+ * Copyright (C) 2003-2007 Wayne Davison
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, visit the http://fsf.org website.
+ */
#include "rsync.h"
+#if !defined MKNOD_CREATES_SOCKETS && defined HAVE_SYS_UN_H
+#include <sys/un.h>
+#endif
+
extern int dry_run;
+extern int am_root;
+extern int read_only;
+extern int list_only;
+extern int preserve_perms;
+
+#define RETURN_ERROR_IF(x,e) \
+ do { \
+ if (x) { \
+ errno = (e); \
+ return -1; \
+ } \
+ } while (0)
-int do_unlink(char *fname)
+#define RETURN_ERROR_IF_RO_OR_LO RETURN_ERROR_IF(read_only || list_only, EROFS)
+
+int do_unlink(const char *fname)
{
if (dry_run) return 0;
+ RETURN_ERROR_IF_RO_OR_LO;
return unlink(fname);
}
-int do_symlink(char *fname1, char *fname2)
+int do_symlink(const char *fname1, const char *fname2)
{
if (dry_run) return 0;
+ RETURN_ERROR_IF_RO_OR_LO;
return symlink(fname1, fname2);
}
-int do_link(char *fname1, char *fname2)
+#ifdef HAVE_LINK
+int do_link(const char *fname1, const char *fname2)
{
if (dry_run) return 0;
+ RETURN_ERROR_IF_RO_OR_LO;
return link(fname1, fname2);
}
+#endif
+
+int do_lchown(const char *path, uid_t owner, gid_t group)
+{
+ if (dry_run) return 0;
+ RETURN_ERROR_IF_RO_OR_LO;
+#ifndef HAVE_LCHOWN
+#define lchown chown
+#endif
+ return lchown(path, owner, group);
+}
-int do_mknod(char *pathname, mode_t mode, dev_t dev)
+int do_mknod(const char *pathname, mode_t mode, dev_t dev)
{
if (dry_run) return 0;
+ RETURN_ERROR_IF_RO_OR_LO;
+
+ /* For --fake-super, we create a normal file with mode 0600. */
+ if (am_root < 0) {
+ int fd = open(pathname, O_WRONLY|O_CREAT|O_TRUNC, S_IWUSR|S_IRUSR);
+ if (fd < 0 || close(fd) < 0)
+ return -1;
+ return 0;
+ }
+
+#if !defined MKNOD_CREATES_FIFOS && defined HAVE_MKFIFO
+ if (S_ISFIFO(mode))
+ return mkfifo(pathname, mode);
+#endif
+#if !defined MKNOD_CREATES_SOCKETS && defined HAVE_SYS_UN_H
+ if (S_ISSOCK(mode)) {
+ int sock;
+ struct sockaddr_un saddr;
+#ifdef HAVE_SOCKADDR_UN_LEN
+ unsigned int len =
+#endif
+ strlcpy(saddr.sun_path, pathname, sizeof saddr.sun_path);
+#ifdef HAVE_SOCKADDR_UN_LEN
+ saddr.sun_len = len >= sizeof saddr.sun_path
+ ? sizeof saddr.sun_path : len + 1;
+#endif
+ saddr.sun_family = AF_UNIX;
+
+ if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0
+ || (unlink(pathname) < 0 && errno != ENOENT)
+ || (bind(sock, (struct sockaddr*)&saddr, sizeof saddr)) < 0)
+ return -1;
+ close(sock);
+#ifdef HAVE_CHMOD
+ return do_chmod(pathname, mode);
+#else
+ return 0;
+#endif
+ }
+#endif
+#ifdef HAVE_MKNOD
return mknod(pathname, mode, dev);
+#else
+ return -1;
+#endif
}
-int do_rmdir(char *pathname)
+int do_rmdir(const char *pathname)
{
if (dry_run) return 0;
+ RETURN_ERROR_IF_RO_OR_LO;
return rmdir(pathname);
}
-int do_open(char *pathname, int flags, mode_t mode)
+int do_open(const char *pathname, int flags, mode_t mode)
+{
+ if (flags != O_RDONLY) {
+ RETURN_ERROR_IF(dry_run, 0);
+ RETURN_ERROR_IF_RO_OR_LO;
+ }
+
+ return open(pathname, flags | O_BINARY, mode);
+}
+
+#ifdef HAVE_CHMOD
+int do_chmod(const char *path, mode_t mode)
+{
+ int code;
+ if (dry_run) return 0;
+ RETURN_ERROR_IF_RO_OR_LO;
+ if (S_ISLNK(mode)) {
+#ifdef HAVE_LCHMOD
+ code = lchmod(path, mode & CHMOD_BITS);
+#else
+ code = 1;
+#endif
+ } else
+ code = chmod(path, mode & CHMOD_BITS);
+ if (code != 0 && preserve_perms)
+ return code;
+ return 0;
+}
+#endif
+
+int do_rename(const char *fname1, const char *fname2)
+{
+ if (dry_run) return 0;
+ RETURN_ERROR_IF_RO_OR_LO;
+ return rename(fname1, fname2);
+}
+
+void trim_trailing_slashes(char *name)
+{
+ int l;
+ /* Some BSD systems cannot make a directory if the name
+ * contains a trailing slash.
+ * <http://www.opensource.apple.com/bugs/X/BSD%20Kernel/2734739.html> */
+
+ /* Don't change empty string; and also we can't improve on
+ * "/" */
+
+ l = strlen(name);
+ while (l > 1) {
+ if (name[--l] != '/')
+ break;
+ name[l] = '\0';
+ }
+}
+
+int do_mkdir(char *fname, mode_t mode)
+{
+ if (dry_run) return 0;
+ RETURN_ERROR_IF_RO_OR_LO;
+ trim_trailing_slashes(fname);
+ return mkdir(fname, mode);
+}
+
+/* like mkstemp but forces permissions */
+int do_mkstemp(char *template, mode_t perms)
+{
+ RETURN_ERROR_IF(dry_run, 0);
+ RETURN_ERROR_IF(read_only, EROFS);
+
+#if defined HAVE_SECURE_MKSTEMP && defined HAVE_FCHMOD && (!defined HAVE_OPEN64 || defined HAVE_MKSTEMP64)
+ {
+ int fd = mkstemp(template);
+ if (fd == -1)
+ return -1;
+ if (fchmod(fd, perms) != 0 && preserve_perms) {
+ int errno_save = errno;
+ close(fd);
+ unlink(template);
+ errno = errno_save;
+ return -1;
+ }
+#if defined HAVE_SETMODE && O_BINARY
+ setmode(fd, O_BINARY);
+#endif
+ return fd;
+ }
+#else
+ if (!mktemp(template))
+ return -1;
+ return do_open(template, O_RDWR|O_EXCL|O_CREAT, perms);
+#endif
+}
+
+int do_stat(const char *fname, STRUCT_STAT *st)
+{
+#ifdef USE_STAT64_FUNCS
+ return stat64(fname, st);
+#else
+ return stat(fname, st);
+#endif
+}
+
+int do_lstat(const char *fname, STRUCT_STAT *st)
+{
+#ifdef SUPPORT_LINKS
+# ifdef USE_STAT64_FUNCS
+ return lstat64(fname, st);
+# else
+ return lstat(fname, st);
+# endif
+#else
+ return do_stat(fname, st);
+#endif
+}
+
+int do_fstat(int fd, STRUCT_STAT *st)
+{
+#ifdef USE_STAT64_FUNCS
+ return fstat64(fd, st);
+#else
+ return fstat(fd, st);
+#endif
+}
+
+OFF_T do_lseek(int fd, OFF_T offset, int whence)
+{
+#ifdef HAVE_LSEEK64
+#if !SIZEOF_OFF64_T
+ OFF_T lseek64();
+#else
+ off64_t lseek64();
+#endif
+ return lseek64(fd, offset, whence);
+#else
+ return lseek(fd, offset, whence);
+#endif
+}
+
+char *d_name(struct dirent *di)
{
- if (dry_run) return -1;
- return open(pathname, flags, mode);
+#ifdef HAVE_BROKEN_READDIR
+ return (di->d_name - 2);
+#else
+ return di->d_name;
+#endif
}
Matt McCutchen's Web Site / rsync / rsync.git / blobdiff