fsetflags.c revision 18a1444b4f1e6a0948fd38fa0de382d86cfe04de 
1/*
2 * fsetflags.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#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 <sys/types.h>
29#include <sys/stat.h>
30#if HAVE_EXT2_IOCTLS
31#include <fcntl.h>
32#include <sys/ioctl.h>
33#endif
34
35#include "e2p.h"
36
37/*
38 * Deal with lame glibc's that define this function without actually
39 * implementing it.  Can you say "attractive nuisance", boys and girls?
40 * I knew you could!
41 */
42#ifdef __linux__
43#undef HAVE_CHFLAGS
44#endif
45
46#ifdef O_LARGEFILE
47#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE)
48#else
49#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK)
50#endif
51
52int fsetflags (const char * name, unsigned long flags)
53{
54#if HAVE_CHFLAGS && !(APPLE_DARWIN && HAVE_EXT2_IOCTLS)
55	unsigned long bsd_flags = 0;
56
57#ifdef UF_IMMUTABLE
58	if (flags & EXT2_IMMUTABLE_FL)
59		bsd_flags |= UF_IMMUTABLE;
60#endif
61#ifdef UF_APPEND
62	if (flags & EXT2_APPEND_FL)
63		bsd_flags |= UF_APPEND;
64#endif
65#ifdef UF_NODUMP
66	if (flags & EXT2_NODUMP_FL)
67		bsd_flags |= UF_NODUMP;
68#endif
69
70	return chflags (name, bsd_flags);
71#else /* !HAVE_CHFLAGS || (APPLE_DARWIN && HAVE_EXT2_IOCTLS) */
72#if HAVE_EXT2_IOCTLS
73	int fd, r, f, save_errno = 0;
74	struct stat buf;
75
76	if (!lstat(name, &buf) &&
77	    !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)) {
78		goto notsupp;
79	}
80#if !APPLE_DARWIN
81	fd = open (name, OPEN_FLAGS);
82	if (fd == -1)
83		return -1;
84	f = (int) flags;
85	r = ioctl (fd, EXT2_IOC_SETFLAGS, &f);
86	if (r == -1)
87		save_errno = errno;
88	close (fd);
89	if (save_errno)
90		errno = save_errno;
91#else /* APPLE_DARWIN */
92	f = (int) flags;
93	return syscall(SYS_fsctl, name, EXT2_IOC_SETFLAGS, &f, 0);
94#endif /* !APPLE_DARWIN */
95	return r;
96
97notsupp:
98#endif /* HAVE_EXT2_IOCTLS */
99#endif
100	errno = EOPNOTSUPP;
101	return -1;
102}
103