1/*
2 * fgetproject.c --- get project id
3 *
4 * Copyright (C) 1999  Theodore Ts'o <tytso@mit.edu>
5 *
6 * %Begin-Header%
7 * This file may be redistributed under the terms of the GNU Library
8 * General Public License, version 2.
9 * %End-Header%
10 */
11
12#ifndef _LARGEFILE_SOURCE
13#define _LARGEFILE_SOURCE
14#endif
15#ifndef _LARGEFILE64_SOURCE
16#define _LARGEFILE64_SOURCE
17#endif
18
19#include "config.h"
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#include "project.h"
32#endif
33
34#include "e2p.h"
35
36#ifdef O_LARGEFILE
37#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE)
38#else
39#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK)
40#endif
41
42int fgetproject(const char *name, unsigned long *project)
43{
44#ifndef FS_IOC_FSGETXATTR
45	errno = EOPNOTSUPP;
46	return -1;
47#else
48	int fd, r, save_errno = 0;
49	struct fsxattr fsx;
50
51	fd = open (name, OPEN_FLAGS);
52	if (fd == -1)
53		return -1;
54	r = ioctl (fd, FS_IOC_FSGETXATTR, &fsx);
55	if (r == 0)
56		*project = fsx.fsx_projid;
57	save_errno = errno;
58	close (fd);
59	if (save_errno)
60		errno = save_errno;
61	return r;
62#endif
63}
64