setflags.c revision d1154eb460efe588eaed3d439c1caaca149fa362 
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#include "config.h"
20#if HAVE_ERRNO_H
21#include <errno.h>
22#endif
23#include <sys/types.h>
24#include <sys/stat.h>
25#if HAVE_EXT2_IOCTLS
26#include <sys/ioctl.h>
27#endif
28
29#include "e2p.h"
30
31/*
32 * Deal with lame glibc's that define this function without actually
33 * implementing it.  Can you say "attractive nuisance", boys and girls?
34 * I knew you could!
35 */
36#ifdef __linux__
37#undef HAVE_CHFLAGS
38#endif
39
40int setflags (int fd, unsigned long flags)
41{
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 /* ! HAVE_CHFLAGS */
60#if HAVE_EXT2_IOCTLS
61	struct stat buf;
62	int	f;
63
64	if (!fstat(fd, &buf) &&
65	    !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)) {
66		errno = EOPNOTSUPP;
67		return -1;
68	}
69	f = (int) flags;
70
71	return ioctl(fd, EXT2_IOC_SETFLAGS, &f);
72#else
73	errno = EOPNOTSUPP;
74	return -1;
75#endif /* HAVE_EXT2_IOCTLS */
76#endif /* HAVE_CHFLAGS */
77}
78