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-rw-r--r--e2fsprogs/e2p/fgetversion.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/e2fsprogs/e2p/fgetversion.c b/e2fsprogs/e2p/fgetversion.c
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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#if HAVE_ERRNO_H
18#include <errno.h>
19#endif
20#if HAVE_UNISTD_H
21#include <unistd.h>
22#endif
23#include <fcntl.h>
24#include <sys/ioctl.h>
25
26#include "e2p.h"
27
28#ifdef O_LARGEFILE
29#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE)
30#else
31#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK)
32#endif
33
34int fgetversion (const char * name, unsigned long * version)
35{
36#if HAVE_EXT2_IOCTLS
37#if !APPLE_DARWIN
38 int fd, r, ver, save_errno = 0;
39
40 fd = open (name, OPEN_FLAGS);
41 if (fd == -1)
42 return -1;
43 r = ioctl (fd, EXT2_IOC_GETVERSION, &ver);
44 if (r == -1)
45 save_errno = errno;
46 *version = ver;
47 close (fd);
48 if (save_errno)
49 errno = save_errno;
50 return r;
51#else
52 int ver=-1, err;
53 err = syscall(SYS_fsctl, name, EXT2_IOC_GETVERSION, &ver, 0);
54 *version = ver;
55 return(err);
56#endif
57#else /* ! HAVE_EXT2_IOCTLS */
58 extern int errno;
59 errno = EOPNOTSUPP;
60 return -1;
61#endif /* ! HAVE_EXT2_IOCTLS */
62}