setflags.c revision a6ce1349539f866334ef3d5758bc2ee44a454acd 
1/*
2 * setflags.c		- Set a file flags 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#if HAVE_ERRNO_H
20#include <errno.h>
21#endif
22#include <sys/types.h>
23#include <sys/stat.h>
24#if HAVE_EXT2_IOCTLS
25#include <sys/ioctl.h>
26#endif
27
28#include "e2p.h"
29
30/*
31 * Deal with lame glibc's that define this function without actually
32 * implementing it.  Can you say "attractive nuisance", boys and girls?
33 * I knew you could!
34 */
35#ifdef __linux__
36#undef HAVE_CHFLAGS
37#endif
38
39int setflags (int fd, unsigned long flags)
40{
41	struct stat buf;
42#if HAVE_CHFLAGS
43	unsigned long bsd_flags = 0;
44
45#ifdef UF_IMMUTABLE
46	if (flags & EXT2_IMMUTABLE_FL)
47		bsd_flags |= UF_IMMUTABLE;
48#endif
49#ifdef UF_APPEND
50	if (flags & EXT2_APPEND_FL)
51		bsd_flags |= UF_APPEND;
52#endif
53#ifdef UF_NODUMP
54	if (flags & EXT2_NODUMP_FL)
55		bsd_flags |= UF_NODUMP;
56#endif
57
58	return fchflags (fd, bsd_flags);
59#else
60#if HAVE_EXT2_IOCTLS
61	int	f;
62
63	if (!fstat(fd, &buf) &&
64	    !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)) {
65		errno = EOPNOTSUPP;
66		return -1;
67	}
68	f = (int) flags;
69	return ioctl (fd, EXT2_IOC_SETFLAGS, &f);
70#endif /* HAVE_EXT2_IOCTLS */
71#endif
72	errno = EOPNOTSUPP;
73	return -1;
74}
75