fstab.c revision 1.5.2.1
1 /* 2 * Copyright (c) 1980, 1988 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #if defined(LIBC_SCCS) && !defined(lint) 35 /*static char *sccsid = "from: @(#)fstab.c 5.15 (Berkeley) 2/23/91";*/ 36 static char *rcsid = "$Id: fstab.c,v 1.5.2.1 1995/05/02 19:34:41 jtc Exp $"; 37 #endif /* LIBC_SCCS and not lint */ 38 39 #include "namespace.h" 40 #include <sys/types.h> 41 #include <sys/errno.h> 42 #include <sys/uio.h> 43 #include <fstab.h> 44 #include <unistd.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 49 static FILE *_fs_fp; 50 static struct fstab _fs_fstab; 51 static error(); 52 53 static 54 fstabscan() 55 { 56 register char *cp; 57 #define MAXLINELENGTH 1024 58 static char line[MAXLINELENGTH]; 59 char subline[MAXLINELENGTH]; 60 int typexx; 61 62 for (;;) { 63 if (!(cp = fgets(line, sizeof(line), _fs_fp))) 64 return(0); 65 /* OLD_STYLE_FSTAB */ 66 if (!strpbrk(cp, " \t")) { 67 _fs_fstab.fs_spec = strtok(cp, ":\n"); 68 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 69 continue; 70 _fs_fstab.fs_file = strtok((char *)NULL, ":\n"); 71 _fs_fstab.fs_type = strtok((char *)NULL, ":\n"); 72 if (_fs_fstab.fs_type) { 73 if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) 74 continue; 75 _fs_fstab.fs_mntops = _fs_fstab.fs_type; 76 _fs_fstab.fs_vfstype = 77 strcmp(_fs_fstab.fs_type, FSTAB_SW) ? 78 "ufs" : "swap"; 79 if (cp = strtok((char *)NULL, ":\n")) { 80 _fs_fstab.fs_freq = atoi(cp); 81 if (cp = strtok((char *)NULL, ":\n")) { 82 _fs_fstab.fs_passno = atoi(cp); 83 return(1); 84 } 85 } 86 } 87 goto bad; 88 } 89 /* OLD_STYLE_FSTAB */ 90 _fs_fstab.fs_spec = strtok(cp, " \t\n"); 91 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 92 continue; 93 _fs_fstab.fs_file = strtok((char *)NULL, " \t\n"); 94 _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n"); 95 _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n"); 96 if (_fs_fstab.fs_mntops == NULL) 97 goto bad; 98 _fs_fstab.fs_freq = 0; 99 _fs_fstab.fs_passno = 0; 100 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) { 101 _fs_fstab.fs_freq = atoi(cp); 102 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) 103 _fs_fstab.fs_passno = atoi(cp); 104 } 105 strcpy(subline, _fs_fstab.fs_mntops); 106 for (typexx = 0, cp = strtok(subline, ","); cp; 107 cp = strtok((char *)NULL, ",")) { 108 if (strlen(cp) != 2) 109 continue; 110 if (!strcmp(cp, FSTAB_RW)) { 111 _fs_fstab.fs_type = FSTAB_RW; 112 break; 113 } 114 if (!strcmp(cp, FSTAB_RQ)) { 115 _fs_fstab.fs_type = FSTAB_RQ; 116 break; 117 } 118 if (!strcmp(cp, FSTAB_RO)) { 119 _fs_fstab.fs_type = FSTAB_RO; 120 break; 121 } 122 if (!strcmp(cp, FSTAB_SW)) { 123 _fs_fstab.fs_type = FSTAB_SW; 124 break; 125 } 126 if (!strcmp(cp, FSTAB_XX)) { 127 _fs_fstab.fs_type = FSTAB_XX; 128 typexx++; 129 break; 130 } 131 } 132 if (typexx) 133 continue; 134 if (cp != NULL) 135 return(1); 136 137 bad: /* no way to distinguish between EOF and syntax error */ 138 error(EFTYPE); 139 } 140 /* NOTREACHED */ 141 } 142 143 struct fstab * 144 getfsent() 145 { 146 if (!_fs_fp && !setfsent() || !fstabscan()) 147 return((struct fstab *)NULL); 148 return(&_fs_fstab); 149 } 150 151 struct fstab * 152 getfsspec(name) 153 register const char *name; 154 { 155 if (setfsent()) 156 while (fstabscan()) 157 if (!strcmp(_fs_fstab.fs_spec, name)) 158 return(&_fs_fstab); 159 return((struct fstab *)NULL); 160 } 161 162 struct fstab * 163 getfsfile(name) 164 register const char *name; 165 { 166 if (setfsent()) 167 while (fstabscan()) 168 if (!strcmp(_fs_fstab.fs_file, name)) 169 return(&_fs_fstab); 170 return((struct fstab *)NULL); 171 } 172 173 setfsent() 174 { 175 if (_fs_fp) { 176 rewind(_fs_fp); 177 return(1); 178 } 179 if (_fs_fp = fopen(_PATH_FSTAB, "r")) 180 return(1); 181 error(errno); 182 return(0); 183 } 184 185 void 186 endfsent() 187 { 188 if (_fs_fp) { 189 (void)fclose(_fs_fp); 190 _fs_fp = NULL; 191 } 192 } 193 194 static 195 error(err) 196 int err; 197 { 198 struct iovec iov[5]; 199 200 iov[0].iov_base = "fstab: "; 201 iov[0].iov_len = 7; 202 iov[1].iov_base = _PATH_FSTAB; 203 iov[1].iov_len = sizeof(_PATH_FSTAB) - 1; 204 iov[2].iov_base = ": "; 205 iov[2].iov_len = 2; 206 iov[3].iov_base = strerror(err); 207 iov[3].iov_len = strlen(iov[3].iov_base); 208 iov[4].iov_base = "\n"; 209 iov[4].iov_len = 1; 210 (void)writev(STDERR_FILENO, iov, 5); 211 } 212
Indexes created Tue Sep 30 20:09:53 GMT 2025