fsetversion.c revision d1154eb460efe588eaed3d439c1caaca149fa362 
1/*
2 * fsetversion.c	- Set a file version on an ext2 file system
3 *
4 * Copyright (C) 1993, 1994  Remy Card <card@masi.ibp.fr>
5 *                           Laboratoire MASI, Institut Blaise Pascal
6 *                           Universite Pierre et Marie Curie (Paris VI)
7 *
8 * %Begin-Header%
9 * This file may be redistributed under the terms of the GNU Library
10 * General Public License, version 2.
11 * %End-Header%
12 */
13
14/*
15 * History:
16 * 93/10/30	- Creation
17 */
18
19#define _LARGEFILE_SOURCE
20#define _LARGEFILE64_SOURCE
21
22#include "config.h"
23#if HAVE_ERRNO_H
24#include <errno.h>
25#endif
26#if HAVE_UNISTD_H
27#include <unistd.h>
28#endif
29#include <fcntl.h>
30#include <sys/ioctl.h>
31
32#include "e2p.h"
33
34#ifdef O_LARGEFILE
35#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE)
36#else
37#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK)
38#endif
39
40int fsetversion (const char * name, unsigned long version)
41{
42#if HAVE_EXT2_IOCTLS
43#if !APPLE_DARWIN
44	int fd, r, ver, save_errno = 0;
45
46	fd = open (name, OPEN_FLAGS);
47	if (fd == -1)
48		return -1;
49	ver = (int) version;
50	r = ioctl (fd, EXT2_IOC_SETVERSION, &ver);
51	if (r == -1)
52		save_errno = errno;
53	close (fd);
54	if (save_errno)
55		errno = save_errno;
56	return r;
57#else
58   int ver = (int)version;
59   return syscall(SYS_fsctl, name, EXT2_IOC_SETVERSION, &ver, 0);
60#endif
61#else /* ! HAVE_EXT2_IOCTLS */
62	extern int errno;
63	errno = EOPNOTSUPP;
64	return -1;
65#endif /* ! HAVE_EXT2_IOCTLS */
66}
67