fstab.c revision 1.9
1 /* $NetBSD: fstab.c,v 1.9 1997/01/23 14:01:52 mrg 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 1.9 1997/01/23 14:01:52 mrg Exp $"; 41 #endif 42 #endif /* LIBC_SCCS and not lint */ 43 44 #include <sys/types.h> 45 #include <sys/uio.h> 46 #include <errno.h> 47 #include <fstab.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 53 static FILE *_fs_fp; 54 static struct fstab _fs_fstab; 55 56 static void error __P((int)); 57 static int fstabscan __P((void)); 58 59 static int 60 fstabscan() 61 { 62 register char *cp; 63 #define MAXLINELENGTH 1024 64 static char line[MAXLINELENGTH]; 65 char subline[MAXLINELENGTH]; 66 int typexx; 67 68 for (;;) { 69 if (!(cp = fgets(line, sizeof(line), _fs_fp))) 70 return(0); 71 /* OLD_STYLE_FSTAB */ 72 if (!strpbrk(cp, " \t")) { 73 _fs_fstab.fs_spec = strtok(cp, ":\n"); 74 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 75 continue; 76 _fs_fstab.fs_file = strtok((char *)NULL, ":\n"); 77 _fs_fstab.fs_type = strtok((char *)NULL, ":\n"); 78 if (_fs_fstab.fs_type) { 79 if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) 80 continue; 81 _fs_fstab.fs_mntops = _fs_fstab.fs_type; 82 _fs_fstab.fs_vfstype = 83 strcmp(_fs_fstab.fs_type, FSTAB_SW) ? 84 "ufs" : "swap"; 85 if (cp = strtok((char *)NULL, ":\n")) { 86 _fs_fstab.fs_freq = atoi(cp); 87 if (cp = strtok((char *)NULL, ":\n")) { 88 _fs_fstab.fs_passno = atoi(cp); 89 return(1); 90 } 91 } 92 } 93 goto bad; 94 } 95 /* OLD_STYLE_FSTAB */ 96 _fs_fstab.fs_spec = strtok(cp, " \t\n"); 97 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 98 continue; 99 _fs_fstab.fs_file = strtok((char *)NULL, " \t\n"); 100 _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n"); 101 _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n"); 102 if (_fs_fstab.fs_mntops == NULL) 103 goto bad; 104 _fs_fstab.fs_freq = 0; 105 _fs_fstab.fs_passno = 0; 106 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) { 107 _fs_fstab.fs_freq = atoi(cp); 108 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) 109 _fs_fstab.fs_passno = atoi(cp); 110 } 111 (void)strncpy(subline, _fs_fstab.fs_mntops, sizeof(subline)-1); 112 for (typexx = 0, cp = strtok(subline, ","); cp; 113 cp = strtok((char *)NULL, ",")) { 114 if (strlen(cp) != 2) 115 continue; 116 if (!strcmp(cp, FSTAB_RW)) { 117 _fs_fstab.fs_type = FSTAB_RW; 118 break; 119 } 120 if (!strcmp(cp, FSTAB_RQ)) { 121 _fs_fstab.fs_type = FSTAB_RQ; 122 break; 123 } 124 if (!strcmp(cp, FSTAB_RO)) { 125 _fs_fstab.fs_type = FSTAB_RO; 126 break; 127 } 128 if (!strcmp(cp, FSTAB_SW)) { 129 _fs_fstab.fs_type = FSTAB_SW; 130 break; 131 } 132 if (!strcmp(cp, FSTAB_XX)) { 133 _fs_fstab.fs_type = FSTAB_XX; 134 typexx++; 135 break; 136 } 137 } 138 if (typexx) 139 continue; 140 if (cp != NULL) 141 return(1); 142 143 bad: /* no way to distinguish between EOF and syntax error */ 144 error(EFTYPE); 145 } 146 /* NOTREACHED */ 147 } 148 149 struct fstab * 150 getfsent() 151 { 152 if (!_fs_fp && !setfsent() || !fstabscan()) 153 return((struct fstab *)NULL); 154 return(&_fs_fstab); 155 } 156 157 struct fstab * 158 getfsspec(name) 159 register const char *name; 160 { 161 if (setfsent()) 162 while (fstabscan()) 163 if (!strcmp(_fs_fstab.fs_spec, name)) 164 return(&_fs_fstab); 165 return((struct fstab *)NULL); 166 } 167 168 struct fstab * 169 getfsfile(name) 170 register const char *name; 171 { 172 if (setfsent()) 173 while (fstabscan()) 174 if (!strcmp(_fs_fstab.fs_file, name)) 175 return(&_fs_fstab); 176 return((struct fstab *)NULL); 177 } 178 179 int 180 setfsent() 181 { 182 if (_fs_fp) { 183 rewind(_fs_fp); 184 return(1); 185 } 186 if (_fs_fp = fopen(_PATH_FSTAB, "r")) 187 return(1); 188 error(errno); 189 return(0); 190 } 191 192 void 193 endfsent() 194 { 195 if (_fs_fp) { 196 (void)fclose(_fs_fp); 197 _fs_fp = NULL; 198 } 199 } 200 201 static void 202 error(err) 203 int err; 204 { 205 struct iovec iov[5]; 206 207 iov[0].iov_base = "fstab: "; 208 iov[0].iov_len = 7; 209 iov[1].iov_base = _PATH_FSTAB; 210 iov[1].iov_len = sizeof(_PATH_FSTAB) - 1; 211 iov[2].iov_base = ": "; 212 iov[2].iov_len = 2; 213 iov[3].iov_base = strerror(err); 214 iov[3].iov_len = strlen(iov[3].iov_base); 215 iov[4].iov_base = "\n"; 216 iov[4].iov_len = 1; 217 (void)writev(STDERR_FILENO, iov, 5); 218 } 219
Indexes created Tue Sep 30 20:09:53 GMT 2025