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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 
fsetproject(const char * name,unsigned long project)42 int fsetproject(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 == -1) {
56 		save_errno = errno;
57 		goto errout;
58 	}
59 	fsx.fsx_projid = project;
60 	r = ioctl (fd, FS_IOC_FSSETXATTR, &fsx);
61 	if (r == -1)
62 		save_errno = errno;
63 errout:
64 	close (fd);
65 	if (save_errno)
66 		errno = save_errno;
67 	return r;
68 #endif
69 }
70