fstab.c revision 1.10
1 /* $NetBSD: fstab.c,v 1.10 1997/07/13 18:58:23 christos 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 1.10 1997/07/13 18:58:23 christos Exp $"); 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include <sys/types.h> 46 #include <sys/uio.h> 47 #include <errno.h> 48 #include <fstab.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 int 61 fstabscan() 62 { 63 register char *cp; 64 #define MAXLINELENGTH 1024 65 static char line[MAXLINELENGTH]; 66 char subline[MAXLINELENGTH]; 67 int typexx; 68 static const char sep[] = ":\n"; 69 static const char ws[] = " \t\n"; 70 71 for (;;) { 72 if (!(cp = fgets(line, sizeof(line), _fs_fp))) 73 return(0); 74 /* OLD_STYLE_FSTAB */ 75 if (!strpbrk(cp, " \t")) { 76 _fs_fstab.fs_spec = strtok(cp, sep); 77 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 78 continue; 79 _fs_fstab.fs_file = strtok(NULL, sep); 80 _fs_fstab.fs_type = strtok(NULL, sep); 81 if (_fs_fstab.fs_type) { 82 if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) 83 continue; 84 _fs_fstab.fs_mntops = _fs_fstab.fs_type; 85 _fs_fstab.fs_vfstype = 86 strcmp(_fs_fstab.fs_type, FSTAB_SW) ? 87 "ufs" : "swap"; 88 if ((cp = strtok(NULL, sep)) != NULL) { 89 _fs_fstab.fs_freq = atoi(cp); 90 if ((cp = strtok(NULL, sep)) != NULL) { 91 _fs_fstab.fs_passno = atoi(cp); 92 return(1); 93 } 94 } 95 } 96 goto bad; 97 } 98 /* OLD_STYLE_FSTAB */ 99 _fs_fstab.fs_spec = strtok(cp, ws); 100 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 101 continue; 102 _fs_fstab.fs_file = strtok(NULL, ws); 103 _fs_fstab.fs_vfstype = strtok(NULL, ws); 104 _fs_fstab.fs_mntops = strtok(NULL, ws); 105 if (_fs_fstab.fs_mntops == NULL) 106 goto bad; 107 _fs_fstab.fs_freq = 0; 108 _fs_fstab.fs_passno = 0; 109 if ((cp = strtok(NULL, ws)) != NULL) { 110 _fs_fstab.fs_freq = atoi(cp); 111 if ((cp = strtok(NULL, ws)) != NULL) 112 _fs_fstab.fs_passno = atoi(cp); 113 } 114 (void)strncpy(subline, _fs_fstab.fs_mntops, sizeof(subline)-1); 115 for (typexx = 0, cp = strtok(subline, ","); cp; 116 cp = strtok((char *)NULL, ",")) { 117 if (strlen(cp) != 2) 118 continue; 119 if (!strcmp(cp, FSTAB_RW)) { 120 _fs_fstab.fs_type = FSTAB_RW; 121 break; 122 } 123 if (!strcmp(cp, FSTAB_RQ)) { 124 _fs_fstab.fs_type = FSTAB_RQ; 125 break; 126 } 127 if (!strcmp(cp, FSTAB_RO)) { 128 _fs_fstab.fs_type = FSTAB_RO; 129 break; 130 } 131 if (!strcmp(cp, FSTAB_SW)) { 132 _fs_fstab.fs_type = FSTAB_SW; 133 break; 134 } 135 if (!strcmp(cp, FSTAB_XX)) { 136 _fs_fstab.fs_type = FSTAB_XX; 137 typexx++; 138 break; 139 } 140 } 141 if (typexx) 142 continue; 143 if (cp != NULL) 144 return(1); 145 146 bad: /* no way to distinguish between EOF and syntax error */ 147 error(EFTYPE); 148 } 149 /* NOTREACHED */ 150 } 151 152 struct fstab * 153 getfsent() 154 { 155 if ((!_fs_fp && !setfsent()) || !fstabscan()) 156 return((struct fstab *)NULL); 157 return(&_fs_fstab); 158 } 159 160 struct fstab * 161 getfsspec(name) 162 register const char *name; 163 { 164 if (setfsent()) 165 while (fstabscan()) 166 if (!strcmp(_fs_fstab.fs_spec, name)) 167 return(&_fs_fstab); 168 return((struct fstab *)NULL); 169 } 170 171 struct fstab * 172 getfsfile(name) 173 register const char *name; 174 { 175 if (setfsent()) 176 while (fstabscan()) 177 if (!strcmp(_fs_fstab.fs_file, name)) 178 return(&_fs_fstab); 179 return((struct fstab *)NULL); 180 } 181 182 int 183 setfsent() 184 { 185 if (_fs_fp) { 186 rewind(_fs_fp); 187 return(1); 188 } 189 if ((_fs_fp = fopen(_PATH_FSTAB, "r")) != NULL) 190 return(1); 191 error(errno); 192 return(0); 193 } 194 195 void 196 endfsent() 197 { 198 if (_fs_fp) { 199 (void)fclose(_fs_fp); 200 _fs_fp = NULL; 201 } 202 } 203 204 static void 205 error(err) 206 int err; 207 { 208 struct iovec iov[5]; 209 210 iov[0].iov_base = "fstab: "; 211 iov[0].iov_len = 7; 212 iov[1].iov_base = _PATH_FSTAB; 213 iov[1].iov_len = sizeof(_PATH_FSTAB) - 1; 214 iov[2].iov_base = ": "; 215 iov[2].iov_len = 2; 216 iov[3].iov_base = strerror(err); 217 iov[3].iov_len = strlen(iov[3].iov_base); 218 iov[4].iov_base = "\n"; 219 iov[4].iov_len = 1; 220 (void)writev(STDERR_FILENO, iov, 5); 221 } 222
Indexes created Tue Sep 30 20:09:53 GMT 2025