fstab.c revision 1.4
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 1.4 1994/08/13 09:03:21 pk Exp $"; 37 #endif /* LIBC_SCCS and not lint */ 38 39 #include <sys/errno.h> 40 #include <fstab.h> 41 #include <unistd.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 46 static FILE *_fs_fp; 47 static struct fstab _fs_fstab; 48 static error(); 49 50 static 51 fstabscan() 52 { 53 register char *cp; 54 #define MAXLINELENGTH 1024 55 static char line[MAXLINELENGTH]; 56 char subline[MAXLINELENGTH]; 57 int typexx; 58 59 for (;;) { 60 if (!(cp = fgets(line, sizeof(line), _fs_fp))) 61 return(0); 62 /* OLD_STYLE_FSTAB */ 63 if (!strpbrk(cp, " \t")) { 64 _fs_fstab.fs_spec = strtok(cp, ":\n"); 65 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 66 continue; 67 _fs_fstab.fs_file = strtok((char *)NULL, ":\n"); 68 _fs_fstab.fs_type = strtok((char *)NULL, ":\n"); 69 if (_fs_fstab.fs_type) { 70 if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) 71 continue; 72 _fs_fstab.fs_mntops = _fs_fstab.fs_type; 73 _fs_fstab.fs_vfstype = 74 strcmp(_fs_fstab.fs_type, FSTAB_SW) ? 75 "ufs" : "swap"; 76 if (cp = strtok((char *)NULL, ":\n")) { 77 _fs_fstab.fs_freq = atoi(cp); 78 if (cp = strtok((char *)NULL, ":\n")) { 79 _fs_fstab.fs_passno = atoi(cp); 80 return(1); 81 } 82 } 83 } 84 goto bad; 85 } 86 /* OLD_STYLE_FSTAB */ 87 _fs_fstab.fs_spec = strtok(cp, " \t\n"); 88 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 89 continue; 90 _fs_fstab.fs_file = strtok((char *)NULL, " \t\n"); 91 _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n"); 92 _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n"); 93 if (_fs_fstab.fs_mntops == NULL) 94 goto bad; 95 _fs_fstab.fs_freq = 0; 96 _fs_fstab.fs_passno = 0; 97 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) { 98 _fs_fstab.fs_freq = atoi(cp); 99 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) 100 _fs_fstab.fs_passno = atoi(cp); 101 } 102 strcpy(subline, _fs_fstab.fs_mntops); 103 for (typexx = 0, cp = strtok(subline, ","); cp; 104 cp = strtok((char *)NULL, ",")) { 105 if (strlen(cp) != 2) 106 continue; 107 if (!strcmp(cp, FSTAB_RW)) { 108 _fs_fstab.fs_type = FSTAB_RW; 109 break; 110 } 111 if (!strcmp(cp, FSTAB_RQ)) { 112 _fs_fstab.fs_type = FSTAB_RQ; 113 break; 114 } 115 if (!strcmp(cp, FSTAB_RO)) { 116 _fs_fstab.fs_type = FSTAB_RO; 117 break; 118 } 119 if (!strcmp(cp, FSTAB_SW)) { 120 _fs_fstab.fs_type = FSTAB_SW; 121 break; 122 } 123 if (!strcmp(cp, FSTAB_XX)) { 124 _fs_fstab.fs_type = FSTAB_XX; 125 typexx++; 126 break; 127 } 128 } 129 if (typexx) 130 continue; 131 if (cp != NULL) 132 return(1); 133 134 bad: /* no way to distinguish between EOF and syntax error */ 135 error(EFTYPE); 136 } 137 /* NOTREACHED */ 138 } 139 140 struct fstab * 141 getfsent() 142 { 143 if (!_fs_fp && !setfsent() || !fstabscan()) 144 return((struct fstab *)NULL); 145 return(&_fs_fstab); 146 } 147 148 struct fstab * 149 getfsspec(name) 150 register const char *name; 151 { 152 if (setfsent()) 153 while (fstabscan()) 154 if (!strcmp(_fs_fstab.fs_spec, name)) 155 return(&_fs_fstab); 156 return((struct fstab *)NULL); 157 } 158 159 struct fstab * 160 getfsfile(name) 161 register const char *name; 162 { 163 if (setfsent()) 164 while (fstabscan()) 165 if (!strcmp(_fs_fstab.fs_file, name)) 166 return(&_fs_fstab); 167 return((struct fstab *)NULL); 168 } 169 170 setfsent() 171 { 172 if (_fs_fp) { 173 rewind(_fs_fp); 174 return(1); 175 } 176 if (_fs_fp = fopen(_PATH_FSTAB, "r")) 177 return(1); 178 error(errno); 179 return(0); 180 } 181 182 void 183 endfsent() 184 { 185 if (_fs_fp) { 186 (void)fclose(_fs_fp); 187 _fs_fp = NULL; 188 } 189 } 190 191 static 192 error(err) 193 int err; 194 { 195 char *p; 196 197 (void)write(STDERR_FILENO, "fstab: ", 7); 198 (void)write(STDERR_FILENO, _PATH_FSTAB, sizeof(_PATH_FSTAB) - 1); 199 (void)write(STDERR_FILENO, ": ", 2); 200 p = strerror(err); 201 (void)write(STDERR_FILENO, p, strlen(p)); 202 (void)write(STDERR_FILENO, "\n", 1); 203 } 204
Indexes created Tue Sep 30 20:09:53 GMT 2025