fstab.c revision 1.1
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[] = "@(#)fstab.c 5.15 (Berkeley) 2/23/91"; 36 #endif /* LIBC_SCCS and not lint */ 37 38 #include <sys/errno.h> 39 #include <fstab.h> 40 #include <unistd.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 static FILE *_fs_fp; 46 static struct fstab _fs_fstab; 47 static error(); 48 49 static 50 fstabscan() 51 { 52 register char *cp; 53 #define MAXLINELENGTH 1024 54 static char line[MAXLINELENGTH]; 55 char subline[MAXLINELENGTH]; 56 int typexx; 57 58 for (;;) { 59 if (!(cp = fgets(line, sizeof(line), _fs_fp))) 60 return(0); 61 /* OLD_STYLE_FSTAB */ 62 if (!strpbrk(cp, " \t")) { 63 _fs_fstab.fs_spec = strtok(cp, ":\n"); 64 _fs_fstab.fs_file = strtok((char *)NULL, ":\n"); 65 _fs_fstab.fs_type = strtok((char *)NULL, ":\n"); 66 if (_fs_fstab.fs_type) { 67 if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) 68 continue; 69 _fs_fstab.fs_mntops = _fs_fstab.fs_type; 70 _fs_fstab.fs_vfstype = 71 strcmp(_fs_fstab.fs_type, FSTAB_SW) ? 72 "ufs" : "swap"; 73 if (cp = strtok((char *)NULL, ":\n")) { 74 _fs_fstab.fs_freq = atoi(cp); 75 if (cp = strtok((char *)NULL, ":\n")) { 76 _fs_fstab.fs_passno = atoi(cp); 77 return(1); 78 } 79 } 80 } 81 goto bad; 82 } 83 /* OLD_STYLE_FSTAB */ 84 _fs_fstab.fs_spec = strtok(cp, " \t\n"); 85 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 86 continue; 87 _fs_fstab.fs_file = strtok((char *)NULL, " \t\n"); 88 _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n"); 89 _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n"); 90 if (_fs_fstab.fs_mntops == NULL) 91 goto bad; 92 _fs_fstab.fs_freq = 0; 93 _fs_fstab.fs_passno = 0; 94 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) { 95 _fs_fstab.fs_freq = atoi(cp); 96 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) 97 _fs_fstab.fs_passno = atoi(cp); 98 } 99 strcpy(subline, _fs_fstab.fs_mntops); 100 for (typexx = 0, cp = strtok(subline, ","); cp; 101 cp = strtok((char *)NULL, ",")) { 102 if (strlen(cp) != 2) 103 continue; 104 if (!strcmp(cp, FSTAB_RW)) { 105 _fs_fstab.fs_type = FSTAB_RW; 106 break; 107 } 108 if (!strcmp(cp, FSTAB_RQ)) { 109 _fs_fstab.fs_type = FSTAB_RQ; 110 break; 111 } 112 if (!strcmp(cp, FSTAB_RO)) { 113 _fs_fstab.fs_type = FSTAB_RO; 114 break; 115 } 116 if (!strcmp(cp, FSTAB_SW)) { 117 _fs_fstab.fs_type = FSTAB_SW; 118 break; 119 } 120 if (!strcmp(cp, FSTAB_XX)) { 121 _fs_fstab.fs_type = FSTAB_XX; 122 typexx++; 123 break; 124 } 125 } 126 if (typexx) 127 continue; 128 if (cp != NULL) 129 return(1); 130 131 bad: /* no way to distinguish between EOF and syntax error */ 132 error(EFTYPE); 133 } 134 /* NOTREACHED */ 135 } 136 137 struct fstab * 138 getfsent() 139 { 140 if (!_fs_fp && !setfsent() || !fstabscan()) 141 return((struct fstab *)NULL); 142 return(&_fs_fstab); 143 } 144 145 struct fstab * 146 getfsspec(name) 147 register const char *name; 148 { 149 if (setfsent()) 150 while (fstabscan()) 151 if (!strcmp(_fs_fstab.fs_spec, name)) 152 return(&_fs_fstab); 153 return((struct fstab *)NULL); 154 } 155 156 struct fstab * 157 getfsfile(name) 158 register const char *name; 159 { 160 if (setfsent()) 161 while (fstabscan()) 162 if (!strcmp(_fs_fstab.fs_file, name)) 163 return(&_fs_fstab); 164 return((struct fstab *)NULL); 165 } 166 167 setfsent() 168 { 169 if (_fs_fp) { 170 rewind(_fs_fp); 171 return(1); 172 } 173 if (_fs_fp = fopen(_PATH_FSTAB, "r")) 174 return(1); 175 error(errno); 176 return(0); 177 } 178 179 void 180 endfsent() 181 { 182 if (_fs_fp) { 183 (void)fclose(_fs_fp); 184 _fs_fp = NULL; 185 } 186 } 187 188 static 189 error(err) 190 int err; 191 { 192 char *p; 193 194 (void)write(STDERR_FILENO, "fstab: ", 7); 195 (void)write(STDERR_FILENO, _PATH_FSTAB, sizeof(_PATH_FSTAB) - 1); 196 p = strerror(err); 197 (void)write(STDERR_FILENO, p, strlen(p)); 198 (void)write(STDERR_FILENO, "\n", 1); 199 } 200
Indexes created Tue Sep 30 20:09:53 GMT 2025