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 * %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 #ifndef _LARGEFILE_SOURCE
20 #define _LARGEFILE_SOURCE
21 #endif
22 #ifndef _LARGEFILE64_SOURCE
23 #define _LARGEFILE64_SOURCE
24 #endif
25
26 #include "config.h"
27 #if HAVE_ERRNO_H
28 #include <errno.h>
29 #endif
30 #if HAVE_UNISTD_H
31 #include <unistd.h>
32 #endif
33 #include <sys/types.h>
34 #include <sys/stat.h>
35 #if HAVE_EXT2_IOCTLS
36 #include <fcntl.h>
37 #include <sys/ioctl.h>
38 #endif
39
40 #include "e2p.h"
41
42 /*
43 * Deal with lame glibc's that define this function without actually
44 * implementing it. Can you say "attractive nuisance", boys and girls?
45 * I knew you could!
46 */
47 #ifdef __linux__
48 #undef HAVE_CHFLAGS
49 #endif
50
51 #ifndef O_LARGEFILE
52 #define O_LARGEFILE 0
53 #endif
54 #ifndef O_NOFOLLOW
55 #define O_NOFOLLOW 0
56 #endif
57
58 #define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW)
59
fsetflags(const char * name,unsigned long flags)60 int fsetflags (const char * name, unsigned long flags)
61 {
62 #if HAVE_CHFLAGS && !(APPLE_DARWIN && HAVE_EXT2_IOCTLS)
63 unsigned long bsd_flags = 0;
64
65 #ifdef UF_IMMUTABLE
66 if (flags & EXT2_IMMUTABLE_FL)
67 bsd_flags |= UF_IMMUTABLE;
68 #endif
69 #ifdef UF_APPEND
70 if (flags & EXT2_APPEND_FL)
71 bsd_flags |= UF_APPEND;
72 #endif
73 #ifdef UF_NODUMP
74 if (flags & EXT2_NODUMP_FL)
75 bsd_flags |= UF_NODUMP;
76 #endif
77
78 return chflags (name, bsd_flags);
79 #elif APPLE_DARWIN && HAVE_EXT2_IOCTLS
80 int f = (int) flags;
81 return syscall(SYS_fsctl, name, EXT2_IOC_SETFLAGS, &f, 0);
82 #elif HAVE_EXT2_IOCTLS
83 struct stat buf;
84 int fd, r, f, save_errno = 0;
85
86 if (!stat(name, &buf) &&
87 !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)) {
88 errno = EOPNOTSUPP;
89 return -1;
90 }
91 fd = open(name, OPEN_FLAGS);
92 if (fd == -1) {
93 if (errno == ELOOP || errno == ENXIO)
94 errno = EOPNOTSUPP;
95 return -1;
96 }
97 if (!fstat(fd, &buf) &&
98 !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)) {
99 close(fd);
100 errno = EOPNOTSUPP;
101 return -1;
102 }
103 f = (int) flags;
104 r = ioctl(fd, EXT2_IOC_SETFLAGS, &f);
105 if (r == -1) {
106 if (errno == ENOTTY)
107 errno = EOPNOTSUPP;
108 save_errno = errno;
109 }
110 close(fd);
111 if (save_errno)
112 errno = save_errno;
113 return r;
114 #else
115 errno = EOPNOTSUPP;
116 return -1;
117 #endif
118 }
119