fstab.c revision 1.15
1 /* $NetBSD: fstab.c,v 1.15 1998/10/11 19:42:29 kleink 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 1.15 1998/10/11 19:42:29 kleink Exp $"); 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include "namespace.h" 46 #include <sys/types.h> 47 #include <sys/uio.h> 48 #include <err.h> 49 #include <errno.h> 50 #include <fstab.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <unistd.h> 55 56 #ifdef __weak_alias 57 __weak_alias(endfsent,_endfsent); 58 __weak_alias(getfsent,_getfsent); 59 __weak_alias(getfsfile,_getfsfile); 60 __weak_alias(getfsspec,_getfsspec); 61 __weak_alias(setfsent,_setfsent); 62 #endif 63 64 static FILE *_fs_fp; 65 static struct fstab _fs_fstab; 66 67 static void error __P((int)); 68 static int fstabscan __P((void)); 69 70 static int 71 fstabscan() 72 { 73 char *cp; 74 #define MAXLINELENGTH 1024 75 static char line[MAXLINELENGTH]; 76 char subline[MAXLINELENGTH]; 77 int typexx; 78 static const char sep[] = ":\n"; 79 static const char ws[] = " \t\n"; 80 81 for (;;) { 82 if (!(cp = fgets(line, sizeof(line), _fs_fp))) 83 return(0); 84 /* OLD_STYLE_FSTAB */ 85 if (!strpbrk(cp, " \t")) { 86 _fs_fstab.fs_spec = strtok(cp, sep); 87 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 88 continue; 89 _fs_fstab.fs_file = strtok(NULL, sep); 90 _fs_fstab.fs_type = strtok(NULL, sep); 91 if (_fs_fstab.fs_type) { 92 if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) 93 continue; 94 _fs_fstab.fs_mntops = _fs_fstab.fs_type; 95 _fs_fstab.fs_vfstype = 96 strcmp(_fs_fstab.fs_type, FSTAB_SW) ? 97 "ufs" : "swap"; 98 if ((cp = strtok(NULL, sep)) != NULL) { 99 _fs_fstab.fs_freq = atoi(cp); 100 if ((cp = strtok(NULL, sep)) != NULL) { 101 _fs_fstab.fs_passno = atoi(cp); 102 return(1); 103 } 104 } 105 } 106 goto bad; 107 } 108 /* OLD_STYLE_FSTAB */ 109 _fs_fstab.fs_spec = strtok(cp, ws); 110 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 111 continue; 112 _fs_fstab.fs_file = strtok(NULL, ws); 113 _fs_fstab.fs_vfstype = strtok(NULL, ws); 114 _fs_fstab.fs_mntops = strtok(NULL, ws); 115 if (_fs_fstab.fs_mntops == NULL) 116 goto bad; 117 _fs_fstab.fs_freq = 0; 118 _fs_fstab.fs_passno = 0; 119 if ((cp = strtok(NULL, ws)) != NULL) { 120 _fs_fstab.fs_freq = atoi(cp); 121 if ((cp = strtok(NULL, ws)) != NULL) 122 _fs_fstab.fs_passno = atoi(cp); 123 } 124 (void)strncpy(subline, _fs_fstab.fs_mntops, sizeof(subline)-1); 125 for (typexx = 0, cp = strtok(subline, ","); cp; 126 cp = strtok((char *)NULL, ",")) { 127 if (strlen(cp) != 2) 128 continue; 129 if (!strcmp(cp, FSTAB_RW)) { 130 _fs_fstab.fs_type = FSTAB_RW; 131 break; 132 } 133 if (!strcmp(cp, FSTAB_RQ)) { 134 _fs_fstab.fs_type = FSTAB_RQ; 135 break; 136 } 137 if (!strcmp(cp, FSTAB_RO)) { 138 _fs_fstab.fs_type = FSTAB_RO; 139 break; 140 } 141 if (!strcmp(cp, FSTAB_SW)) { 142 _fs_fstab.fs_type = FSTAB_SW; 143 break; 144 } 145 if (!strcmp(cp, FSTAB_XX)) { 146 _fs_fstab.fs_type = FSTAB_XX; 147 typexx++; 148 break; 149 } 150 } 151 if (typexx) 152 continue; 153 if (cp != NULL) 154 return(1); 155 156 bad: /* no way to distinguish between EOF and syntax error */ 157 error(EFTYPE); 158 } 159 /* NOTREACHED */ 160 } 161 162 struct fstab * 163 getfsent() 164 { 165 if ((!_fs_fp && !setfsent()) || !fstabscan()) 166 return((struct fstab *)NULL); 167 return(&_fs_fstab); 168 } 169 170 struct fstab * 171 getfsspec(name) 172 const char *name; 173 { 174 if (setfsent()) 175 while (fstabscan()) 176 if (!strcmp(_fs_fstab.fs_spec, name)) 177 return(&_fs_fstab); 178 return((struct fstab *)NULL); 179 } 180 181 struct fstab * 182 getfsfile(name) 183 const char *name; 184 { 185 if (setfsent()) 186 while (fstabscan()) 187 if (!strcmp(_fs_fstab.fs_file, name)) 188 return(&_fs_fstab); 189 return((struct fstab *)NULL); 190 } 191 192 int 193 setfsent() 194 { 195 if (_fs_fp) { 196 rewind(_fs_fp); 197 return(1); 198 } 199 if ((_fs_fp = fopen(_PATH_FSTAB, "r")) != NULL) 200 return(1); 201 error(errno); 202 return(0); 203 } 204 205 void 206 endfsent() 207 { 208 if (_fs_fp) { 209 (void)fclose(_fs_fp); 210 _fs_fp = NULL; 211 } 212 } 213 214 static void 215 error(err) 216 int err; 217 { 218 219 errno = err; 220 warn(_PATH_FSTAB); 221 } 222
Indexes created Tue Sep 30 20:09:53 GMT 2025