fstab.c revision 1.8.2.1
1 /* $NetBSD: fstab.c,v 1.8.2.1 1996/09/19 20:02:35 jtc 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 #if defined(LIBC_SCCS) && !defined(lint) 37 #if 0 38 static char sccsid[] = "@(#)fstab.c 8.1 (Berkeley) 6/4/93"; 39 #else 40 static char rcsid[] = "$NetBSD: fstab.c,v 1.8.2.1 1996/09/19 20:02:35 jtc Exp $"; 41 #endif 42 #endif /* LIBC_SCCS and not lint */ 43 44 #include "namespace.h" 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 #ifdef __weak_alias 55 __weak_alias(endfsent,_endfsent); 56 __weak_alias(getfsent,_getfsent); 57 __weak_alias(getfsfile,_getfsfile); 58 __weak_alias(getfsspec,_getfsspec); 59 __weak_alias(setfsent,_setfsent); 60 #endif 61 62 static FILE *_fs_fp; 63 static struct fstab _fs_fstab; 64 65 static void error __P((int)); 66 static int fstabscan __P((void)); 67 68 static int 69 fstabscan() 70 { 71 register char *cp; 72 #define MAXLINELENGTH 1024 73 static char line[MAXLINELENGTH]; 74 char subline[MAXLINELENGTH]; 75 int typexx; 76 77 for (;;) { 78 if (!(cp = fgets(line, sizeof(line), _fs_fp))) 79 return(0); 80 /* OLD_STYLE_FSTAB */ 81 if (!strpbrk(cp, " \t")) { 82 _fs_fstab.fs_spec = strtok(cp, ":\n"); 83 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 84 continue; 85 _fs_fstab.fs_file = strtok((char *)NULL, ":\n"); 86 _fs_fstab.fs_type = strtok((char *)NULL, ":\n"); 87 if (_fs_fstab.fs_type) { 88 if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) 89 continue; 90 _fs_fstab.fs_mntops = _fs_fstab.fs_type; 91 _fs_fstab.fs_vfstype = 92 strcmp(_fs_fstab.fs_type, FSTAB_SW) ? 93 "ufs" : "swap"; 94 if (cp = strtok((char *)NULL, ":\n")) { 95 _fs_fstab.fs_freq = atoi(cp); 96 if (cp = strtok((char *)NULL, ":\n")) { 97 _fs_fstab.fs_passno = atoi(cp); 98 return(1); 99 } 100 } 101 } 102 goto bad; 103 } 104 /* OLD_STYLE_FSTAB */ 105 _fs_fstab.fs_spec = strtok(cp, " \t\n"); 106 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 107 continue; 108 _fs_fstab.fs_file = strtok((char *)NULL, " \t\n"); 109 _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n"); 110 _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n"); 111 if (_fs_fstab.fs_mntops == NULL) 112 goto bad; 113 _fs_fstab.fs_freq = 0; 114 _fs_fstab.fs_passno = 0; 115 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) { 116 _fs_fstab.fs_freq = atoi(cp); 117 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) 118 _fs_fstab.fs_passno = atoi(cp); 119 } 120 strcpy(subline, _fs_fstab.fs_mntops); 121 for (typexx = 0, cp = strtok(subline, ","); cp; 122 cp = strtok((char *)NULL, ",")) { 123 if (strlen(cp) != 2) 124 continue; 125 if (!strcmp(cp, FSTAB_RW)) { 126 _fs_fstab.fs_type = FSTAB_RW; 127 break; 128 } 129 if (!strcmp(cp, FSTAB_RQ)) { 130 _fs_fstab.fs_type = FSTAB_RQ; 131 break; 132 } 133 if (!strcmp(cp, FSTAB_RO)) { 134 _fs_fstab.fs_type = FSTAB_RO; 135 break; 136 } 137 if (!strcmp(cp, FSTAB_SW)) { 138 _fs_fstab.fs_type = FSTAB_SW; 139 break; 140 } 141 if (!strcmp(cp, FSTAB_XX)) { 142 _fs_fstab.fs_type = FSTAB_XX; 143 typexx++; 144 break; 145 } 146 } 147 if (typexx) 148 continue; 149 if (cp != NULL) 150 return(1); 151 152 bad: /* no way to distinguish between EOF and syntax error */ 153 error(EFTYPE); 154 } 155 /* NOTREACHED */ 156 } 157 158 struct fstab * 159 getfsent() 160 { 161 if (!_fs_fp && !setfsent() || !fstabscan()) 162 return((struct fstab *)NULL); 163 return(&_fs_fstab); 164 } 165 166 struct fstab * 167 getfsspec(name) 168 register const char *name; 169 { 170 if (setfsent()) 171 while (fstabscan()) 172 if (!strcmp(_fs_fstab.fs_spec, name)) 173 return(&_fs_fstab); 174 return((struct fstab *)NULL); 175 } 176 177 struct fstab * 178 getfsfile(name) 179 register const char *name; 180 { 181 if (setfsent()) 182 while (fstabscan()) 183 if (!strcmp(_fs_fstab.fs_file, name)) 184 return(&_fs_fstab); 185 return((struct fstab *)NULL); 186 } 187 188 int 189 setfsent() 190 { 191 if (_fs_fp) { 192 rewind(_fs_fp); 193 return(1); 194 } 195 if (_fs_fp = fopen(_PATH_FSTAB, "r")) 196 return(1); 197 error(errno); 198 return(0); 199 } 200 201 void 202 endfsent() 203 { 204 if (_fs_fp) { 205 (void)fclose(_fs_fp); 206 _fs_fp = NULL; 207 } 208 } 209 210 static void 211 error(err) 212 int err; 213 { 214 struct iovec iov[5]; 215 216 iov[0].iov_base = "fstab: "; 217 iov[0].iov_len = 7; 218 iov[1].iov_base = _PATH_FSTAB; 219 iov[1].iov_len = sizeof(_PATH_FSTAB) - 1; 220 iov[2].iov_base = ": "; 221 iov[2].iov_len = 2; 222 iov[3].iov_base = strerror(err); 223 iov[3].iov_len = strlen(iov[3].iov_base); 224 iov[4].iov_base = "\n"; 225 iov[4].iov_len = 1; 226 (void)writev(STDERR_FILENO, iov, 5); 227 } 228
Indexes created Tue Sep 30 20:09:53 GMT 2025