fstab.c revision 1.6
1 /* $NetBSD: fstab.c,v 1.6 1995/02/27 03:43:12 cgd 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 1.6 1995/02/27 03:43:12 cgd Exp $"; 41 #endif 42 #endif /* LIBC_SCCS and not lint */ 43 44 #include <errno.h> 45 #include <fstab.h> 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include <unistd.h> 50 51 static FILE *_fs_fp; 52 static struct fstab _fs_fstab; 53 54 static error __P((int)); 55 static fstabscan __P((void)); 56 57 static 58 fstabscan() 59 { 60 register char *cp; 61 #define MAXLINELENGTH 1024 62 static char line[MAXLINELENGTH]; 63 char subline[MAXLINELENGTH]; 64 int typexx; 65 66 for (;;) { 67 if (!(cp = fgets(line, sizeof(line), _fs_fp))) 68 return(0); 69 /* OLD_STYLE_FSTAB */ 70 if (!strpbrk(cp, " \t")) { 71 _fs_fstab.fs_spec = strtok(cp, ":\n"); 72 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 73 continue; 74 _fs_fstab.fs_file = strtok((char *)NULL, ":\n"); 75 _fs_fstab.fs_type = strtok((char *)NULL, ":\n"); 76 if (_fs_fstab.fs_type) { 77 if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) 78 continue; 79 _fs_fstab.fs_mntops = _fs_fstab.fs_type; 80 _fs_fstab.fs_vfstype = 81 strcmp(_fs_fstab.fs_type, FSTAB_SW) ? 82 "ufs" : "swap"; 83 if (cp = strtok((char *)NULL, ":\n")) { 84 _fs_fstab.fs_freq = atoi(cp); 85 if (cp = strtok((char *)NULL, ":\n")) { 86 _fs_fstab.fs_passno = atoi(cp); 87 return(1); 88 } 89 } 90 } 91 goto bad; 92 } 93 /* OLD_STYLE_FSTAB */ 94 _fs_fstab.fs_spec = strtok(cp, " \t\n"); 95 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 96 continue; 97 _fs_fstab.fs_file = strtok((char *)NULL, " \t\n"); 98 _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n"); 99 _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n"); 100 if (_fs_fstab.fs_mntops == NULL) 101 goto bad; 102 _fs_fstab.fs_freq = 0; 103 _fs_fstab.fs_passno = 0; 104 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) { 105 _fs_fstab.fs_freq = atoi(cp); 106 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) 107 _fs_fstab.fs_passno = atoi(cp); 108 } 109 strcpy(subline, _fs_fstab.fs_mntops); 110 for (typexx = 0, cp = strtok(subline, ","); cp; 111 cp = strtok((char *)NULL, ",")) { 112 if (strlen(cp) != 2) 113 continue; 114 if (!strcmp(cp, FSTAB_RW)) { 115 _fs_fstab.fs_type = FSTAB_RW; 116 break; 117 } 118 if (!strcmp(cp, FSTAB_RQ)) { 119 _fs_fstab.fs_type = FSTAB_RQ; 120 break; 121 } 122 if (!strcmp(cp, FSTAB_RO)) { 123 _fs_fstab.fs_type = FSTAB_RO; 124 break; 125 } 126 if (!strcmp(cp, FSTAB_SW)) { 127 _fs_fstab.fs_type = FSTAB_SW; 128 break; 129 } 130 if (!strcmp(cp, FSTAB_XX)) { 131 _fs_fstab.fs_type = FSTAB_XX; 132 typexx++; 133 break; 134 } 135 } 136 if (typexx) 137 continue; 138 if (cp != NULL) 139 return(1); 140 141 bad: /* no way to distinguish between EOF and syntax error */ 142 error(EFTYPE); 143 } 144 /* NOTREACHED */ 145 } 146 147 struct fstab * 148 getfsent() 149 { 150 if (!_fs_fp && !setfsent() || !fstabscan()) 151 return((struct fstab *)NULL); 152 return(&_fs_fstab); 153 } 154 155 struct fstab * 156 getfsspec(name) 157 register const char *name; 158 { 159 if (setfsent()) 160 while (fstabscan()) 161 if (!strcmp(_fs_fstab.fs_spec, name)) 162 return(&_fs_fstab); 163 return((struct fstab *)NULL); 164 } 165 166 struct fstab * 167 getfsfile(name) 168 register const char *name; 169 { 170 if (setfsent()) 171 while (fstabscan()) 172 if (!strcmp(_fs_fstab.fs_file, name)) 173 return(&_fs_fstab); 174 return((struct fstab *)NULL); 175 } 176 177 setfsent() 178 { 179 if (_fs_fp) { 180 rewind(_fs_fp); 181 return(1); 182 } 183 if (_fs_fp = fopen(_PATH_FSTAB, "r")) 184 return(1); 185 error(errno); 186 return(0); 187 } 188 189 void 190 endfsent() 191 { 192 if (_fs_fp) { 193 (void)fclose(_fs_fp); 194 _fs_fp = NULL; 195 } 196 } 197 198 static 199 error(err) 200 int err; 201 { 202 struct iovec iov[5]; 203 204 iov[0].iov_base = "fstab: "; 205 iov[0].iov_len = 7; 206 iov[1].iov_base = _PATH_FSTAB; 207 iov[1].iov_len = sizeof(_PATH_FSTAB) - 1; 208 iov[2].iov_base = ": "; 209 iov[2].iov_len = 2; 210 iov[3].iov_base = strerror(err); 211 iov[3].iov_len = strlen(iov[3].iov_base); 212 iov[4].iov_base = "\n"; 213 iov[4].iov_len = 1; 214 (void)writev(STDERR_FILENO, iov, 5); 215 } 216
Indexes created Tue Sep 30 20:09:53 GMT 2025