-/*
- Copyright (C) Andrew Tridgell 1998
- Copyright (C) 2002 by Martin Pool
-
- 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.
-*/
-
-/**
- * @file syscall.c
- *
+/*
* 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 2 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
+ */
#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 CHECK_RO if (read_only || list_only) {errno = EROFS; return -1;}
+#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;
- CHECK_RO
+ 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;
- CHECK_RO
+ RETURN_ERROR_IF_RO_OR_LO;
return symlink(fname1, fname2);
}
-#if HAVE_LINK
-int do_link(char *fname1, char *fname2)
+#ifdef HAVE_LINK
+int do_link(const char *fname1, const char *fname2)
{
if (dry_run) return 0;
- CHECK_RO
+ 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;
- CHECK_RO
+ RETURN_ERROR_IF_RO_OR_LO;
+#ifndef HAVE_LCHOWN
+#define lchown chown
+#endif
return lchown(path, owner, group);
}
-#if HAVE_MKNOD
-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;
- CHECK_RO
+ 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;
- CHECK_RO
+ 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) {
- if (dry_run) return -1;
- CHECK_RO
+ RETURN_ERROR_IF(dry_run, 0);
+ RETURN_ERROR_IF_RO_OR_LO;
}
-#ifdef O_BINARY
- /* for Windows */
- flags |= O_BINARY;
-#endif
- /* some systems can't handle a double / */
- if (pathname[0] == '/' && pathname[1] == '/') pathname++;
- return open(pathname, flags, mode);
+ return open(pathname, flags | O_BINARY, mode);
}
-#if HAVE_CHMOD
+#ifdef HAVE_CHMOD
int do_chmod(const char *path, mode_t mode)
{
+ int code;
if (dry_run) return 0;
- CHECK_RO
- return chmod(path, mode);
+ 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(char *fname1, char *fname2)
+int do_rename(const char *fname1, const char *fname2)
{
if (dry_run) return 0;
- CHECK_RO
+ RETURN_ERROR_IF_RO_OR_LO;
return rename(fname1, fname2);
}
-
void trim_trailing_slashes(char *name)
{
- char *p;
+ 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> */
- if (!*name)
- return; /* empty string */
- p = strchr(name, '\0') - 1;
- while (p == '/') {
- p-- = '\0';
+
+ /* 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;
- CHECK_RO;
- trim_trailing_slashes(fname);
+ 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)
{
- if (dry_run) return -1;
- if (read_only) {errno = EROFS; return -1;}
+ RETURN_ERROR_IF(dry_run, 0);
+ RETURN_ERROR_IF(read_only, EROFS);
-#if defined(HAVE_SECURE_MKSTEMP) && defined(HAVE_FCHMOD)
+#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) {
+ 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;
+ 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)
{
-#if HAVE_OFF64_T
+#ifdef USE_STAT64_FUNCS
return stat64(fname, st);
#else
return stat(fname, st);
#endif
}
-#if SUPPORT_LINKS
int do_lstat(const char *fname, STRUCT_STAT *st)
{
-#if HAVE_OFF64_T
+#ifdef SUPPORT_LINKS
+# ifdef USE_STAT64_FUNCS
return lstat64(fname, st);
-#else
+# else
return lstat(fname, st);
+# endif
+#else
+ return do_stat(fname, st);
#endif
}
-#endif
int do_fstat(int fd, STRUCT_STAT *st)
{
-#if HAVE_OFF64_T
+#ifdef USE_STAT64_FUNCS
return fstat64(fd, st);
#else
return fstat(fd, st);
OFF_T do_lseek(int fd, OFF_T offset, int whence)
{
-#if HAVE_OFF64_T
+#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
}
-#ifdef USE_MMAP
-void *do_mmap(void *start, int len, int prot, int flags, int fd, OFF_T offset)
-{
-#if HAVE_OFF64_T
- return mmap64(start, len, prot, flags, fd, offset);
-#else
- return mmap(start, len, prot, flags, fd, offset);
-#endif
-}
-#endif
-
char *d_name(struct dirent *di)
{
-#if HAVE_BROKEN_READDIR
+#ifdef HAVE_BROKEN_READDIR
return (di->d_name - 2);
#else
return di->d_name;
Matt McCutchen's Web Site / rsync / rsync.git / blobdiff