setflags.c revision 19dacda2b02bb08c0ffb649f84526b249c749279 
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 * 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#include <sys/types.h>
21#include <sys/stat.h>
22#if HAVE_EXT2_IOCTLS
23#include <sys/ioctl.h>
24#endif
25
26#include "e2p.h"
27
28/*
29 * Deal with lame glibc's that define this function without actually
30 * implementing it.  Can you say "attractive nuisance", boys and girls?
31 * I knew you could!
32 */
33#ifdef __linux__
34#undef HAVE_CHFLAGS
35#endif
36
37int setflags (int fd, unsigned long flags)
38{
39	struct stat buf;
40#if HAVE_CHFLAGS
41	unsigned long bsd_flags = 0;
42
43#ifdef UF_IMMUTABLE
44	if (flags & EXT2_IMMUTABLE_FL)
45		bsd_flags |= UF_IMMUTABLE;
46#endif
47#ifdef UF_APPEND
48	if (flags & EXT2_APPEND_FL)
49		bsd_flags |= UF_APPEND;
50#endif
51#ifdef UF_NODUMP
52	if (flags & EXT2_NODUMP_FL)
53		bsd_flags |= UF_NODUMP;
54#endif
55
56	return fchflags (fd, bsd_flags);
57#else
58#if HAVE_EXT2_IOCTLS
59	int	f;
60
61	if (!fstat(fd, &buf) &&
62	    !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)) {
63		errno = EOPNOTSUPP;
64		return -1;
65	}
66	f = (int) flags;
67	return ioctl (fd, EXT2_IOC_SETFLAGS, &f);
68#endif /* HAVE_EXT2_IOCTLS */
69#endif
70	errno = EOPNOTSUPP;
71	return -1;
72}
73