fgetflags.c revision d1154eb460efe588eaed3d439c1caaca149fa362 
1/*
2 * fgetflags.c		- Get 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#include "config.h"
23#if HAVE_ERRNO_H
24#include <errno.h>
25#endif
26#if HAVE_UNISTD_H
27#include <unistd.h>
28#endif
29#include <sys/types.h>
30#include <sys/stat.h>
31#if HAVE_EXT2_IOCTLS
32#include <fcntl.h>
33#include <sys/ioctl.h>
34#endif
35
36#include "e2p.h"
37
38#ifdef O_LARGEFILE
39#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE)
40#else
41#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK)
42#endif
43
44int fgetflags (const char * name, unsigned long * flags)
45{
46	struct stat buf;
47#if HAVE_STAT_FLAGS && !(APPLE_DARWIN && HAVE_EXT2_IOCTLS)
48
49	if (stat (name, &buf) == -1)
50		return -1;
51
52	*flags = 0;
53#ifdef UF_IMMUTABLE
54	if (buf.st_flags & UF_IMMUTABLE)
55		*flags |= EXT2_IMMUTABLE_FL;
56#endif
57#ifdef UF_APPEND
58	if (buf.st_flags & UF_APPEND)
59		*flags |= EXT2_APPEND_FL;
60#endif
61#ifdef UF_NODUMP
62	if (buf.st_flags & UF_NODUMP)
63		*flags |= EXT2_NODUMP_FL;
64#endif
65
66	return 0;
67#else /* !HAVE_STAT_FLAGS || (APPLE_DARWIN && HAVE_EXT2_IOCTLS) */
68#if HAVE_EXT2_IOCTLS
69	int fd, r, f, save_errno = 0;
70
71	if (!lstat(name, &buf) &&
72	    !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)) {
73		goto notsupp;
74	}
75#if !APPLE_DARWIN
76	fd = open (name, OPEN_FLAGS);
77	if (fd == -1)
78		return -1;
79	r = ioctl (fd, EXT2_IOC_GETFLAGS, &f);
80	if (r == -1)
81		save_errno = errno;
82	*flags = f;
83	close (fd);
84	if (save_errno)
85		errno = save_errno;
86	return r;
87#else /* APPLE_DARWIN */
88   f = -1;
89   save_errno = syscall(SYS_fsctl, name, EXT2_IOC_GETFLAGS, &f, 0);
90   *flags = f;
91   return (save_errno);
92#endif /* !APPLE_DARWIN */
93notsupp:
94#endif /* HAVE_EXT2_IOCTLS */
95#endif
96	errno = EOPNOTSUPP;
97	return -1;
98}
99