/*
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
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-/*
- syscall wrappers to ensure that nothing gets done in dry_run mode
- */
+/**
+ * @file syscall.c
+ *
+ * Syscall wrappers to ensure that nothing gets done in dry_run mode
+ * and to handle system peculiarities.
+ **/
#include "rsync.h"
+#if !MKNOD_CREATES_SOCKETS && HAVE_SYS_UN_H
+#include <sys/un.h>
+#endif
+
extern int dry_run;
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)
-#define CHECK_RO if (read_only || list_only) {errno = EROFS; return -1;}
+#define RETURN_ERROR_IF_RO_OR_LO RETURN_ERROR_IF(read_only || list_only, EROFS)
int do_unlink(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)
{
if (dry_run) return 0;
- CHECK_RO
+ RETURN_ERROR_IF_RO_OR_LO;
return symlink(fname1, fname2);
}
int do_link(char *fname1, 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;
+#if !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)
{
if (dry_run) return 0;
- CHECK_RO
+ RETURN_ERROR_IF_RO_OR_LO;
+#if !MKNOD_CREATES_FIFOS && HAVE_MKFIFO
+ if (S_ISFIFO(mode))
+ return mkfifo(pathname, mode);
+#endif
+#if !MKNOD_CREATES_SOCKETS && HAVE_SYS_UN_H
+ if (S_ISSOCK(mode)) {
+ int sock;
+ struct sockaddr_un saddr;
+ unsigned int len;
+
+ saddr.sun_family = AF_UNIX;
+ len = strlcpy(saddr.sun_path, pathname, sizeof saddr.sun_path);
+#if HAVE_SOCKADDR_UN_LEN
+ saddr.sun_len = len >= sizeof saddr.sun_path
+ ? sizeof saddr.sun_path : len + 1;
+#endif
+
+ 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);
+ return do_chmod(pathname, mode);
+ }
+#endif
+#if HAVE_MKNOD
return mknod(pathname, mode, dev);
-}
+#else
+ return -1;
#endif
+}
int do_rmdir(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)
{
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
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;
+ code = chmod(path, mode);
+ if (code != 0 && preserve_perms)
+ return code;
+ return 0;
}
#endif
int do_rename(char *fname1, 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)
+{
+ 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;
- CHECK_RO
+ RETURN_ERROR_IF_RO_OR_LO;
+ trim_trailing_slashes(fname);
return mkdir(fname, mode);
}
-char *do_mktemp(char *template)
+
+/* like mkstemp but forces permissions */
+int do_mkstemp(char *template, mode_t perms)
{
- if (dry_run) return NULL;
- if (read_only) {errno = EROFS; return NULL;}
- return mktemp(template);
+ RETURN_ERROR_IF(dry_run, 0);
+ RETURN_ERROR_IF(read_only, EROFS);
+
+#if HAVE_SECURE_MKSTEMP && HAVE_FCHMOD && (!HAVE_OPEN64 || 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 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)
{
-#if HAVE_OFF64_T
+#if 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
+#if SUPPORT_LINKS
+# if 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
+#if 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
+#if SIZEOF_OFF64_T
off64_t lseek64();
return lseek64(fd, offset, whence);
#else
#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
git.samba.org / rsync.git / blobdiff