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Commit | Line | Data |
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1 | /* | |
2 | * Ported to Linux's Second Extended File System as part of the | |
3 | * dump and restore backup suit | |
4 | * Remy Card <card@Linux.EU.Org>, 1994-1997 | |
5 | * Stelian Pop <pop@cybercable.fr>, 1999 | |
6 | * | |
7 | */ | |
8 | ||
9 | /* | |
10 | * Copyright (c) 1980, 1988, 1993 | |
11 | * The Regents of the University of California. All rights reserved. | |
12 | * | |
13 | * Redistribution and use in source and binary forms, with or without | |
14 | * modification, are permitted provided that the following conditions | |
15 | * are met: | |
16 | * 1. Redistributions of source code must retain the above copyright | |
17 | * notice, this list of conditions and the following disclaimer. | |
18 | * 2. Redistributions in binary form must reproduce the above copyright | |
19 | * notice, this list of conditions and the following disclaimer in the | |
20 | * documentation and/or other materials provided with the distribution. | |
21 | * 3. All advertising materials mentioning features or use of this software | |
22 | * must display the following acknowledgement: | |
23 | * This product includes software developed by the University of | |
24 | * California, Berkeley and its contributors. | |
25 | * 4. Neither the name of the University nor the names of its contributors | |
26 | * may be used to endorse or promote products derived from this software | |
27 | * without specific prior written permission. | |
28 | * | |
29 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
30 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
31 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
32 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
33 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
34 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
35 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
36 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
37 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
38 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
39 | * SUCH DAMAGE. | |
40 | */ | |
41 | ||
42 | #if defined(LIBC_SCCS) && !defined(lint) | |
43 | static char sccsid[] = "@(#)fstab.c 8.1 (Berkeley) 6/4/93"; | |
44 | #endif /* LIBC_SCCS and not lint */ | |
45 | ||
46 | #include <errno.h> | |
47 | #include <fstab.h> | |
48 | #include <mntent.h> | |
49 | #include <stdio.h> | |
50 | #include <stdlib.h> | |
51 | #include <string.h> | |
52 | #include <unistd.h> | |
53 | ||
54 | static FILE *_fs_fp; | |
55 | static struct fstab _fs_fstab; | |
56 | ||
57 | static void error __P((int)); | |
58 | static int fstabscan __P((void)); | |
59 | ||
60 | static | |
61 | int fstabscan() | |
62 | { | |
63 | struct mntent *mnt; | |
64 | register char *cp; | |
65 | int typexx; | |
66 | #define MAXLINELENGTH 1024 | |
67 | char subline[MAXLINELENGTH]; | |
68 | ||
69 | for (;;) { | |
70 | if (!(mnt = getmntent(_fs_fp))) | |
71 | return 0; | |
72 | ||
73 | _fs_fstab.fs_spec = mnt->mnt_fsname; | |
74 | _fs_fstab.fs_file = mnt->mnt_dir; | |
75 | _fs_fstab.fs_vfstype = mnt->mnt_type; | |
76 | _fs_fstab.fs_mntops = mnt->mnt_opts; | |
77 | _fs_fstab.fs_type = FSTAB_RW; /* rw by default under Linux */ | |
78 | _fs_fstab.fs_freq = mnt->mnt_freq; | |
79 | _fs_fstab.fs_passno = mnt->mnt_passno; | |
80 | ||
81 | strcpy(subline, _fs_fstab.fs_mntops); | |
82 | for (typexx = 0, cp = strtok(subline, ","); cp; | |
83 | cp = strtok((char *)NULL, ",")) { | |
84 | if (!strcmp(cp, FSTAB_RW)) { | |
85 | _fs_fstab.fs_type = FSTAB_RW; | |
86 | break; | |
87 | } | |
88 | if (!strcmp(cp, FSTAB_RQ)) { | |
89 | _fs_fstab.fs_type = FSTAB_RQ; | |
90 | break; | |
91 | } | |
92 | if (!strcmp(cp, FSTAB_RO)) { | |
93 | _fs_fstab.fs_type = FSTAB_RO; | |
94 | break; | |
95 | } | |
96 | if (!strcmp(cp, FSTAB_SW)) { | |
97 | _fs_fstab.fs_type = FSTAB_SW; | |
98 | break; | |
99 | } | |
100 | if (!strcmp(cp, FSTAB_XX)) { | |
101 | _fs_fstab.fs_type = FSTAB_XX; | |
102 | typexx++; | |
103 | break; | |
104 | } | |
105 | } | |
106 | if (typexx) | |
107 | continue; | |
108 | ||
109 | return 1; | |
110 | } | |
111 | } | |
112 | ||
113 | struct fstab * | |
114 | getfsent() | |
115 | { | |
116 | if ((!_fs_fp && !setfsent()) || !fstabscan()) | |
117 | return((struct fstab *)NULL); | |
118 | return(&_fs_fstab); | |
119 | } | |
120 | ||
121 | struct fstab * | |
122 | getfsspec(name) | |
123 | register const char *name; | |
124 | { | |
125 | if (setfsent()) | |
126 | while (fstabscan()) | |
127 | if (!strcmp(_fs_fstab.fs_spec, name)) | |
128 | return(&_fs_fstab); | |
129 | return((struct fstab *)NULL); | |
130 | } | |
131 | ||
132 | struct fstab * | |
133 | getfsfile(name) | |
134 | register const char *name; | |
135 | { | |
136 | if (setfsent()) | |
137 | while (fstabscan()) | |
138 | if (!strcmp(_fs_fstab.fs_file, name)) | |
139 | return(&_fs_fstab); | |
140 | return((struct fstab *)NULL); | |
141 | } | |
142 | ||
143 | int setfsent() | |
144 | { | |
145 | if (_fs_fp) { | |
146 | rewind(_fs_fp); | |
147 | return(1); | |
148 | } | |
149 | if ((_fs_fp = setmntent(_PATH_FSTAB, "r"))) | |
150 | return(1); | |
151 | error(errno); | |
152 | return(0); | |
153 | } | |
154 | ||
155 | void | |
156 | endfsent() | |
157 | { | |
158 | if (_fs_fp) { | |
159 | (void)endmntent(_fs_fp); | |
160 | _fs_fp = NULL; | |
161 | } | |
162 | } | |
163 | ||
164 | static | |
165 | void error(err) | |
166 | int err; | |
167 | { | |
168 | char *p; | |
169 | ||
170 | (void)write(STDERR_FILENO, "fstab: ", 7); | |
171 | (void)write(STDERR_FILENO, _PATH_FSTAB, sizeof(_PATH_FSTAB) - 1); | |
172 | (void)write(STDERR_FILENO, ": ", 1); | |
173 | p = strerror(err); | |
174 | (void)write(STDERR_FILENO, p, strlen(p)); | |
175 | (void)write(STDERR_FILENO, "\n", 1); | |
176 | } |