fsetversion.c revision 18a1444b4f1e6a0948fd38fa0de382d86cfe04de 
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#if HAVE_ERRNO_H
23#include <errno.h>
24#endif
25#if HAVE_UNISTD_H
26#include <unistd.h>
27#endif
28#include <fcntl.h>
29#include <sys/ioctl.h>
30
31#include "e2p.h"
32
33#ifdef O_LARGEFILE
34#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE)
35#else
36#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK)
37#endif
38
39int fsetversion (const char * name, unsigned long version)
40{
41#if HAVE_EXT2_IOCTLS
42#if !APPLE_DARWIN
43	int fd, r, ver, save_errno = 0;
44
45	fd = open (name, OPEN_FLAGS);
46	if (fd == -1)
47		return -1;
48	ver = (int) version;
49	r = ioctl (fd, EXT2_IOC_SETVERSION, &ver);
50	if (r == -1)
51		save_errno = errno;
52	close (fd);
53	if (save_errno)
54		errno = save_errno;
55	return r;
56#else
57   int ver = (int)version;
58   return syscall(SYS_fsctl, name, EXT2_IOC_SETVERSION, &ver, 0);
59#endif
60#else /* ! HAVE_EXT2_IOCTLS */
61	extern int errno;
62	errno = EOPNOTSUPP;
63	return -1;
64#endif /* ! HAVE_EXT2_IOCTLS */
65}
66