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
fsetversion(const char * name,unsigned long version)39 int 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