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 * This file can be redistributed under the terms of the GNU Library General
9 * Public License
10 */
11
12/*
13 * History:
14 * 93/10/30	- Creation
15 */
16
17#define _LARGEFILE_SOURCE
18#define _LARGEFILE64_SOURCE
19
20#if HAVE_ERRNO_H
21#include <errno.h>
22#endif
23#if HAVE_UNISTD_H
24#include <unistd.h>
25#endif
26#include <fcntl.h>
27#include <sys/ioctl.h>
28
29#include "e2p.h"
30
31#ifdef O_LARGEFILE
32#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE)
33#else
34#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK)
35#endif
36
37int fgetversion (const char * name, unsigned long * version)
38{
39#if HAVE_EXT2_IOCTLS
40#if !APPLE_DARWIN
41	int fd, r, ver, save_errno = 0;
42
43	fd = open (name, OPEN_FLAGS);
44	if (fd == -1)
45		return -1;
46	r = ioctl (fd, EXT2_IOC_GETVERSION, &ver);
47	if (r == -1)
48		save_errno = errno;
49	*version = ver;
50	close (fd);
51	if (save_errno)
52		errno = save_errno;
53	return r;
54#else
55   int ver=-1, err;
56   err = syscall(SYS_fsctl, name, EXT2_IOC_GETVERSION, &ver, 0);
57   *version = ver;
58   return(err);
59#endif
60#else /* ! HAVE_EXT2_IOCTLS */
61	extern int errno;
62	errno = EOPNOTSUPP;
63	return -1;
64#endif /* ! HAVE_EXT2_IOCTLS */
65}
66