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15637ed4 RG |
1 | /* |
2 | * Copyright (c) 1980, 1988 Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | */ | |
33 | ||
34 | #if defined(LIBC_SCCS) && !defined(lint) | |
35 | static char sccsid[] = "@(#)fstab.c 5.15 (Berkeley) 2/23/91"; | |
36 | #endif /* LIBC_SCCS and not lint */ | |
37 | ||
38 | #include <sys/errno.h> | |
39 | #include <fstab.h> | |
40 | #include <unistd.h> | |
41 | #include <stdio.h> | |
42 | #include <stdlib.h> | |
43 | #include <string.h> | |
44 | ||
45 | static FILE *_fs_fp; | |
46 | static struct fstab _fs_fstab; | |
47 | static error(); | |
48 | ||
49 | static | |
50 | fstabscan() | |
51 | { | |
52 | register char *cp; | |
53 | #define MAXLINELENGTH 1024 | |
54 | static char line[MAXLINELENGTH]; | |
55 | char subline[MAXLINELENGTH]; | |
56 | int typexx; | |
57 | ||
58 | for (;;) { | |
59 | if (!(cp = fgets(line, sizeof(line), _fs_fp))) | |
60 | return(0); | |
61 | /* OLD_STYLE_FSTAB */ | |
62 | if (!strpbrk(cp, " \t")) { | |
63 | _fs_fstab.fs_spec = strtok(cp, ":\n"); | |
64 | _fs_fstab.fs_file = strtok((char *)NULL, ":\n"); | |
65 | _fs_fstab.fs_type = strtok((char *)NULL, ":\n"); | |
66 | if (_fs_fstab.fs_type) { | |
67 | if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) | |
68 | continue; | |
69 | _fs_fstab.fs_mntops = _fs_fstab.fs_type; | |
70 | _fs_fstab.fs_vfstype = | |
71 | strcmp(_fs_fstab.fs_type, FSTAB_SW) ? | |
72 | "ufs" : "swap"; | |
73 | if (cp = strtok((char *)NULL, ":\n")) { | |
74 | _fs_fstab.fs_freq = atoi(cp); | |
75 | if (cp = strtok((char *)NULL, ":\n")) { | |
76 | _fs_fstab.fs_passno = atoi(cp); | |
77 | return(1); | |
78 | } | |
79 | } | |
80 | } | |
81 | goto bad; | |
82 | } | |
83 | /* OLD_STYLE_FSTAB */ | |
84 | _fs_fstab.fs_spec = strtok(cp, " \t\n"); | |
85 | if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') | |
86 | continue; | |
87 | _fs_fstab.fs_file = strtok((char *)NULL, " \t\n"); | |
88 | _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n"); | |
89 | _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n"); | |
90 | if (_fs_fstab.fs_mntops == NULL) | |
91 | goto bad; | |
92 | _fs_fstab.fs_freq = 0; | |
93 | _fs_fstab.fs_passno = 0; | |
94 | if ((cp = strtok((char *)NULL, " \t\n")) != NULL) { | |
95 | _fs_fstab.fs_freq = atoi(cp); | |
96 | if ((cp = strtok((char *)NULL, " \t\n")) != NULL) | |
97 | _fs_fstab.fs_passno = atoi(cp); | |
98 | } | |
99 | strcpy(subline, _fs_fstab.fs_mntops); | |
100 | for (typexx = 0, cp = strtok(subline, ","); cp; | |
101 | cp = strtok((char *)NULL, ",")) { | |
102 | if (strlen(cp) != 2) | |
103 | continue; | |
104 | if (!strcmp(cp, FSTAB_RW)) { | |
105 | _fs_fstab.fs_type = FSTAB_RW; | |
106 | break; | |
107 | } | |
108 | if (!strcmp(cp, FSTAB_RQ)) { | |
109 | _fs_fstab.fs_type = FSTAB_RQ; | |
110 | break; | |
111 | } | |
112 | if (!strcmp(cp, FSTAB_RO)) { | |
113 | _fs_fstab.fs_type = FSTAB_RO; | |
114 | break; | |
115 | } | |
116 | if (!strcmp(cp, FSTAB_SW)) { | |
117 | _fs_fstab.fs_type = FSTAB_SW; | |
118 | break; | |
119 | } | |
120 | if (!strcmp(cp, FSTAB_XX)) { | |
121 | _fs_fstab.fs_type = FSTAB_XX; | |
122 | typexx++; | |
123 | break; | |
124 | } | |
125 | } | |
126 | if (typexx) | |
127 | continue; | |
128 | if (cp != NULL) | |
129 | return(1); | |
130 | ||
131 | bad: /* no way to distinguish between EOF and syntax error */ | |
132 | error(EFTYPE); | |
133 | } | |
134 | /* NOTREACHED */ | |
135 | } | |
136 | ||
137 | struct fstab * | |
138 | getfsent() | |
139 | { | |
140 | if (!_fs_fp && !setfsent() || !fstabscan()) | |
141 | return((struct fstab *)NULL); | |
142 | return(&_fs_fstab); | |
143 | } | |
144 | ||
145 | struct fstab * | |
146 | getfsspec(name) | |
147 | register const char *name; | |
148 | { | |
149 | if (setfsent()) | |
150 | while (fstabscan()) | |
151 | if (!strcmp(_fs_fstab.fs_spec, name)) | |
152 | return(&_fs_fstab); | |
153 | return((struct fstab *)NULL); | |
154 | } | |
155 | ||
156 | struct fstab * | |
157 | getfsfile(name) | |
158 | register const char *name; | |
159 | { | |
160 | if (setfsent()) | |
161 | while (fstabscan()) | |
162 | if (!strcmp(_fs_fstab.fs_file, name)) | |
163 | return(&_fs_fstab); | |
164 | return((struct fstab *)NULL); | |
165 | } | |
166 | ||
167 | setfsent() | |
168 | { | |
169 | if (_fs_fp) { | |
170 | rewind(_fs_fp); | |
171 | return(1); | |
172 | } | |
173 | if (_fs_fp = fopen(_PATH_FSTAB, "r")) | |
174 | return(1); | |
175 | error(errno); | |
176 | return(0); | |
177 | } | |
178 | ||
179 | void | |
180 | endfsent() | |
181 | { | |
182 | if (_fs_fp) { | |
183 | (void)fclose(_fs_fp); | |
184 | _fs_fp = NULL; | |
185 | } | |
186 | } | |
187 | ||
188 | static | |
189 | error(err) | |
190 | int err; | |
191 | { | |
192 | char *p; | |
193 | ||
194 | (void)write(STDERR_FILENO, "fstab: ", 7); | |
195 | (void)write(STDERR_FILENO, _PATH_FSTAB, sizeof(_PATH_FSTAB) - 1); | |
196 | p = strerror(err); | |
197 | (void)write(STDERR_FILENO, p, strlen(p)); | |
198 | (void)write(STDERR_FILENO, "\n", 1); | |
199 | } |