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 #ifndef _LARGEFILE_SOURCE
20 #define _LARGEFILE_SOURCE
21 #endif
22 #ifndef _LARGEFILE64_SOURCE
23 #define _LARGEFILE64_SOURCE
24 #endif
25
26 #include "config.h"
27 #if HAVE_ERRNO_H
28 #include <errno.h>
29 #endif
30 #if HAVE_UNISTD_H
31 #include <unistd.h>
32 #endif
33 #include <fcntl.h>
34 #include <sys/ioctl.h>
35
36 #include "e2p.h"
37
38 #ifdef O_LARGEFILE
39 #define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE)
40 #else
41 #define OPEN_FLAGS (O_RDONLY|O_NONBLOCK)
42 #endif
43
fsetversion(const char * name,unsigned long version)44 int fsetversion (const char * name, unsigned long version)
45 {
46 #if HAVE_EXT2_IOCTLS
47 #if !APPLE_DARWIN
48 int fd, r, ver, save_errno = 0;
49
50 fd = open (name, OPEN_FLAGS);
51 if (fd == -1)
52 return -1;
53 ver = (int) version;
54 r = ioctl (fd, EXT2_IOC_SETVERSION, &ver);
55 if (r == -1)
56 save_errno = errno;
57 close (fd);
58 if (save_errno)
59 errno = save_errno;
60 return r;
61 #else
62 int ver = (int)version;
63 return syscall(SYS_fsctl, name, EXT2_IOC_SETVERSION, &ver, 0);
64 #endif
65 #else /* ! HAVE_EXT2_IOCTLS */
66 extern int errno;
67 errno = EOPNOTSUPP;
68 return -1;
69 #endif /* ! HAVE_EXT2_IOCTLS */
70 }
71