fstab.c revision 1.5
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 1994/08/13 09:41:50 mycroft Exp $"; 37 #endif /* LIBC_SCCS and not lint */ 38 39 #include <sys/types.h> 40 #include <sys/errno.h> 41 #include <sys/uio.h> 42 #include <fstab.h> 43 #include <unistd.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 48 static FILE *_fs_fp; 49 static struct fstab _fs_fstab; 50 static error(); 51 52 static 53 fstabscan() 54 { 55 register char *cp; 56 #define MAXLINELENGTH 1024 57 static char line[MAXLINELENGTH]; 58 char subline[MAXLINELENGTH]; 59 int typexx; 60 61 for (;;) { 62 if (!(cp = fgets(line, sizeof(line), _fs_fp))) 63 return(0); 64 /* OLD_STYLE_FSTAB */ 65 if (!strpbrk(cp, " \t")) { 66 _fs_fstab.fs_spec = strtok(cp, ":\n"); 67 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 68 continue; 69 _fs_fstab.fs_file = strtok((char *)NULL, ":\n"); 70 _fs_fstab.fs_type = strtok((char *)NULL, ":\n"); 71 if (_fs_fstab.fs_type) { 72 if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) 73 continue; 74 _fs_fstab.fs_mntops = _fs_fstab.fs_type; 75 _fs_fstab.fs_vfstype = 76 strcmp(_fs_fstab.fs_type, FSTAB_SW) ? 77 "ufs" : "swap"; 78 if (cp = strtok((char *)NULL, ":\n")) { 79 _fs_fstab.fs_freq = atoi(cp); 80 if (cp = strtok((char *)NULL, ":\n")) { 81 _fs_fstab.fs_passno = atoi(cp); 82 return(1); 83 } 84 } 85 } 86 goto bad; 87 } 88 /* OLD_STYLE_FSTAB */ 89 _fs_fstab.fs_spec = strtok(cp, " \t\n"); 90 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 91 continue; 92 _fs_fstab.fs_file = strtok((char *)NULL, " \t\n"); 93 _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n"); 94 _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n"); 95 if (_fs_fstab.fs_mntops == NULL) 96 goto bad; 97 _fs_fstab.fs_freq = 0; 98 _fs_fstab.fs_passno = 0; 99 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) { 100 _fs_fstab.fs_freq = atoi(cp); 101 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) 102 _fs_fstab.fs_passno = atoi(cp); 103 } 104 strcpy(subline, _fs_fstab.fs_mntops); 105 for (typexx = 0, cp = strtok(subline, ","); cp; 106 cp = strtok((char *)NULL, ",")) { 107 if (strlen(cp) != 2) 108 continue; 109 if (!strcmp(cp, FSTAB_RW)) { 110 _fs_fstab.fs_type = FSTAB_RW; 111 break; 112 } 113 if (!strcmp(cp, FSTAB_RQ)) { 114 _fs_fstab.fs_type = FSTAB_RQ; 115 break; 116 } 117 if (!strcmp(cp, FSTAB_RO)) { 118 _fs_fstab.fs_type = FSTAB_RO; 119 break; 120 } 121 if (!strcmp(cp, FSTAB_SW)) { 122 _fs_fstab.fs_type = FSTAB_SW; 123 break; 124 } 125 if (!strcmp(cp, FSTAB_XX)) { 126 _fs_fstab.fs_type = FSTAB_XX; 127 typexx++; 128 break; 129 } 130 } 131 if (typexx) 132 continue; 133 if (cp != NULL) 134 return(1); 135 136 bad: /* no way to distinguish between EOF and syntax error */ 137 error(EFTYPE); 138 } 139 /* NOTREACHED */ 140 } 141 142 struct fstab * 143 getfsent() 144 { 145 if (!_fs_fp && !setfsent() || !fstabscan()) 146 return((struct fstab *)NULL); 147 return(&_fs_fstab); 148 } 149 150 struct fstab * 151 getfsspec(name) 152 register const char *name; 153 { 154 if (setfsent()) 155 while (fstabscan()) 156 if (!strcmp(_fs_fstab.fs_spec, name)) 157 return(&_fs_fstab); 158 return((struct fstab *)NULL); 159 } 160 161 struct fstab * 162 getfsfile(name) 163 register const char *name; 164 { 165 if (setfsent()) 166 while (fstabscan()) 167 if (!strcmp(_fs_fstab.fs_file, name)) 168 return(&_fs_fstab); 169 return((struct fstab *)NULL); 170 } 171 172 setfsent() 173 { 174 if (_fs_fp) { 175 rewind(_fs_fp); 176 return(1); 177 } 178 if (_fs_fp = fopen(_PATH_FSTAB, "r")) 179 return(1); 180 error(errno); 181 return(0); 182 } 183 184 void 185 endfsent() 186 { 187 if (_fs_fp) { 188 (void)fclose(_fs_fp); 189 _fs_fp = NULL; 190 } 191 } 192 193 static 194 error(err) 195 int err; 196 { 197 struct iovec iov[5]; 198 199 iov[0].iov_base = "fstab: "; 200 iov[0].iov_len = 7; 201 iov[1].iov_base = _PATH_FSTAB; 202 iov[1].iov_len = sizeof(_PATH_FSTAB) - 1; 203 iov[2].iov_base = ": "; 204 iov[2].iov_len = 2; 205 iov[3].iov_base = strerror(err); 206 iov[3].iov_len = strlen(iov[3].iov_base); 207 iov[4].iov_base = "\n"; 208 iov[4].iov_len = 1; 209 (void)writev(STDERR_FILENO, iov, 5); 210 } 211
Indexes created Tue Sep 30 20:09:53 GMT 2025