1/*
2 * fgetversion.c	- Get 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 fgetversion (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	r = ioctl (fd, EXT2_IOC_GETVERSION, &ver);
49	if (r == -1)
50		save_errno = errno;
51	*version = ver;
52	close (fd);
53	if (save_errno)
54		errno = save_errno;
55	return r;
56#else
57   int ver=-1, err;
58   err = syscall(SYS_fsctl, name, EXT2_IOC_GETVERSION, &ver, 0);
59   *version = ver;
60   return(err);
61#endif
62#else /* ! HAVE_EXT2_IOCTLS */
63	extern int errno;
64	errno = EOPNOTSUPP;
65	return -1;
66#endif /* ! HAVE_EXT2_IOCTLS */
67}
68