fsetflags.c revision efc6f628e15de95bcd13e4f0ee223cb42115d520 
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 * 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#define _LARGEFILE_SOURCE
18#define _LARGEFILE64_SOURCE
19
20#if HAVE_ERRNO_H
21#include <errno.h>
22#endif
23#if HAVE_UNISTD_H
24#include <unistd.h>
25#endif
26#include <sys/types.h>
27#include <sys/stat.h>
28#if HAVE_EXT2_IOCTLS
29#include <fcntl.h>
30#include <sys/ioctl.h>
31#endif
32
33#include "e2p.h"
34
35/*
36 * Deal with lame glibc's that define this function without actually
37 * implementing it.  Can you say "attractive nuisance", boys and girls?
38 * I knew you could!
39 */
40#ifdef __linux__
41#undef HAVE_CHFLAGS
42#endif
43
44#ifdef O_LARGEFILE
45#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE)
46#else
47#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK)
48#endif
49
50int fsetflags (const char * name, unsigned long flags)
51{
52	struct stat buf;
53#if HAVE_CHFLAGS && !(APPLE_DARWIN && HAVE_EXT2_IOCTLS)
54	unsigned long bsd_flags = 0;
55
56#ifdef UF_IMMUTABLE
57	if (flags & EXT2_IMMUTABLE_FL)
58		bsd_flags |= UF_IMMUTABLE;
59#endif
60#ifdef UF_APPEND
61	if (flags & EXT2_APPEND_FL)
62		bsd_flags |= UF_APPEND;
63#endif
64#ifdef UF_NODUMP
65	if (flags & EXT2_NODUMP_FL)
66		bsd_flags |= UF_NODUMP;
67#endif
68
69	return chflags (name, bsd_flags);
70#else
71#if HAVE_EXT2_IOCTLS
72	int fd, r, f, save_errno = 0;
73
74	if (!lstat(name, &buf) &&
75	    !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)) {
76		goto notsupp;
77	}
78#if !APPLE_DARWIN
79	fd = open (name, OPEN_FLAGS);
80	if (fd == -1)
81		return -1;
82	f = (int) flags;
83	r = ioctl (fd, EXT2_IOC_SETFLAGS, &f);
84	if (r == -1)
85		save_errno = errno;
86	close (fd);
87	if (save_errno)
88		errno = save_errno;
89#else
90   f = (int) flags;
91   return syscall(SYS_fsctl, name, EXT2_IOC_SETFLAGS, &f, 0);
92#endif
93	return r;
94#endif /* HAVE_EXT2_IOCTLS */
95#endif
96notsupp:
97	errno = EOPNOTSUPP;
98	return -1;
99}
100