fstab.c revision 1.14
1 /* $NetBSD: fstab.c,v 1.14 1998/07/26 13:51:27 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1988, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(LIBC_SCCS) && !defined(lint) 38 #if 0 39 static char sccsid[] = "@(#)fstab.c 8.1 (Berkeley) 6/4/93"; 40 #else 41 __RCSID("$NetBSD: fstab.c,v 1.14 1998/07/26 13:51:27 mycroft Exp $"); 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include <sys/types.h> 46 #include <sys/uio.h> 47 #include <err.h> 48 #include <errno.h> 49 #include <fstab.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <unistd.h> 54 55 #ifdef __weak_alias 56 __weak_alias(endfsent,_endfsent); 57 __weak_alias(getfsent,_getfsent); 58 __weak_alias(getfsfile,_getfsfile); 59 __weak_alias(getfsspec,_getfsspec); 60 __weak_alias(setfsent,_setfsent); 61 #endif 62 63 static FILE *_fs_fp; 64 static struct fstab _fs_fstab; 65 66 static void error __P((int)); 67 static int fstabscan __P((void)); 68 69 static int 70 fstabscan() 71 { 72 char *cp; 73 #define MAXLINELENGTH 1024 74 static char line[MAXLINELENGTH]; 75 char subline[MAXLINELENGTH]; 76 int typexx; 77 static const char sep[] = ":\n"; 78 static const char ws[] = " \t\n"; 79 80 for (;;) { 81 if (!(cp = fgets(line, sizeof(line), _fs_fp))) 82 return(0); 83 /* OLD_STYLE_FSTAB */ 84 if (!strpbrk(cp, " \t")) { 85 _fs_fstab.fs_spec = strtok(cp, sep); 86 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 87 continue; 88 _fs_fstab.fs_file = strtok(NULL, sep); 89 _fs_fstab.fs_type = strtok(NULL, sep); 90 if (_fs_fstab.fs_type) { 91 if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) 92 continue; 93 _fs_fstab.fs_mntops = _fs_fstab.fs_type; 94 _fs_fstab.fs_vfstype = 95 strcmp(_fs_fstab.fs_type, FSTAB_SW) ? 96 "ufs" : "swap"; 97 if ((cp = strtok(NULL, sep)) != NULL) { 98 _fs_fstab.fs_freq = atoi(cp); 99 if ((cp = strtok(NULL, sep)) != NULL) { 100 _fs_fstab.fs_passno = atoi(cp); 101 return(1); 102 } 103 } 104 } 105 goto bad; 106 } 107 /* OLD_STYLE_FSTAB */ 108 _fs_fstab.fs_spec = strtok(cp, ws); 109 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 110 continue; 111 _fs_fstab.fs_file = strtok(NULL, ws); 112 _fs_fstab.fs_vfstype = strtok(NULL, ws); 113 _fs_fstab.fs_mntops = strtok(NULL, ws); 114 if (_fs_fstab.fs_mntops == NULL) 115 goto bad; 116 _fs_fstab.fs_freq = 0; 117 _fs_fstab.fs_passno = 0; 118 if ((cp = strtok(NULL, ws)) != NULL) { 119 _fs_fstab.fs_freq = atoi(cp); 120 if ((cp = strtok(NULL, ws)) != NULL) 121 _fs_fstab.fs_passno = atoi(cp); 122 } 123 (void)strncpy(subline, _fs_fstab.fs_mntops, sizeof(subline)-1); 124 for (typexx = 0, cp = strtok(subline, ","); cp; 125 cp = strtok((char *)NULL, ",")) { 126 if (strlen(cp) != 2) 127 continue; 128 if (!strcmp(cp, FSTAB_RW)) { 129 _fs_fstab.fs_type = FSTAB_RW; 130 break; 131 } 132 if (!strcmp(cp, FSTAB_RQ)) { 133 _fs_fstab.fs_type = FSTAB_RQ; 134 break; 135 } 136 if (!strcmp(cp, FSTAB_RO)) { 137 _fs_fstab.fs_type = FSTAB_RO; 138 break; 139 } 140 if (!strcmp(cp, FSTAB_SW)) { 141 _fs_fstab.fs_type = FSTAB_SW; 142 break; 143 } 144 if (!strcmp(cp, FSTAB_XX)) { 145 _fs_fstab.fs_type = FSTAB_XX; 146 typexx++; 147 break; 148 } 149 } 150 if (typexx) 151 continue; 152 if (cp != NULL) 153 return(1); 154 155 bad: /* no way to distinguish between EOF and syntax error */ 156 error(EFTYPE); 157 } 158 /* NOTREACHED */ 159 } 160 161 struct fstab * 162 getfsent() 163 { 164 if ((!_fs_fp && !setfsent()) || !fstabscan()) 165 return((struct fstab *)NULL); 166 return(&_fs_fstab); 167 } 168 169 struct fstab * 170 getfsspec(name) 171 const char *name; 172 { 173 if (setfsent()) 174 while (fstabscan()) 175 if (!strcmp(_fs_fstab.fs_spec, name)) 176 return(&_fs_fstab); 177 return((struct fstab *)NULL); 178 } 179 180 struct fstab * 181 getfsfile(name) 182 const char *name; 183 { 184 if (setfsent()) 185 while (fstabscan()) 186 if (!strcmp(_fs_fstab.fs_file, name)) 187 return(&_fs_fstab); 188 return((struct fstab *)NULL); 189 } 190 191 int 192 setfsent() 193 { 194 if (_fs_fp) { 195 rewind(_fs_fp); 196 return(1); 197 } 198 if ((_fs_fp = fopen(_PATH_FSTAB, "r")) != NULL) 199 return(1); 200 error(errno); 201 return(0); 202 } 203 204 void 205 endfsent() 206 { 207 if (_fs_fp) { 208 (void)fclose(_fs_fp); 209 _fs_fp = NULL; 210 } 211 } 212 213 static void 214 error(err) 215 int err; 216 { 217 218 errno = err; 219 warn(_PATH_FSTAB); 220 } 221
Indexes created Tue Sep 30 20:09:53 GMT 2025