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
fsetflags(const char * name,unsigned long flags)50 int 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 (!stat(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
96 notsupp:
97 errno = EOPNOTSUPP;
98 return -1;
99 }
100