1 /* 2 * Copyright (c) 1980, 1988, 1993 3 * The Regents of the University of California. 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 8.1 (Berkeley) 6/4/93"; 36 #endif /* LIBC_SCCS and not lint */ 37 38 #include <errno.h> 39 #include <fstab.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 45 static FILE *_fs_fp; 46 static struct fstab _fs_fstab; 47 static int LineNo = 0; 48 49 static error __P((int)); 50 static fstabscan __P((void)); 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 63 if (!(cp = fgets(line, sizeof(line), _fs_fp))) 64 return(0); 65 /* OLD_STYLE_FSTAB */ 66 ++LineNo; 67 if (*line == '#' || *line == '\n') 68 continue; 69 if (!strpbrk(cp, " \t")) { 70 _fs_fstab.fs_spec = strtok(cp, ":\n"); 71 _fs_fstab.fs_file = strtok((char *)NULL, ":\n"); 72 _fs_fstab.fs_type = strtok((char *)NULL, ":\n"); 73 if (_fs_fstab.fs_type) { 74 if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) 75 continue; 76 _fs_fstab.fs_mntops = _fs_fstab.fs_type; 77 _fs_fstab.fs_vfstype = 78 strcmp(_fs_fstab.fs_type, FSTAB_SW) ? 79 "ufs" : "swap"; 80 if (cp = strtok((char *)NULL, ":\n")) { 81 _fs_fstab.fs_freq = atoi(cp); 82 if (cp = strtok((char *)NULL, ":\n")) { 83 _fs_fstab.fs_passno = atoi(cp); 84 return(1); 85 } 86 } 87 } 88 goto bad; 89 } 90 /* OLD_STYLE_FSTAB */ 91 _fs_fstab.fs_spec = strtok(cp, " \t\n"); 92 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 93 continue; 94 _fs_fstab.fs_file = strtok((char *)NULL, " \t\n"); 95 _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n"); 96 _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n"); 97 if (_fs_fstab.fs_mntops == NULL) 98 goto bad; 99 _fs_fstab.fs_freq = 0; 100 _fs_fstab.fs_passno = 0; 101 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) { 102 _fs_fstab.fs_freq = atoi(cp); 103 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) 104 _fs_fstab.fs_passno = atoi(cp); 105 } 106 strcpy(subline, _fs_fstab.fs_mntops); 107 for (typexx = 0, cp = strtok(subline, ","); cp; 108 cp = strtok((char *)NULL, ",")) { 109 if (strlen(cp) != 2) 110 continue; 111 if (!strcmp(cp, FSTAB_RW)) { 112 _fs_fstab.fs_type = FSTAB_RW; 113 break; 114 } 115 if (!strcmp(cp, FSTAB_RQ)) { 116 _fs_fstab.fs_type = FSTAB_RQ; 117 break; 118 } 119 if (!strcmp(cp, FSTAB_RO)) { 120 _fs_fstab.fs_type = FSTAB_RO; 121 break; 122 } 123 if (!strcmp(cp, FSTAB_SW)) { 124 _fs_fstab.fs_type = FSTAB_SW; 125 break; 126 } 127 if (!strcmp(cp, FSTAB_XX)) { 128 _fs_fstab.fs_type = FSTAB_XX; 129 typexx++; 130 break; 131 } 132 } 133 if (typexx) 134 continue; 135 if (cp != NULL) 136 return(1); 137 138 bad: /* no way to distinguish between EOF and syntax error */ 139 error(EFTYPE); 140 } 141 /* NOTREACHED */ 142 } 143 144 struct fstab * 145 getfsent() 146 { 147 if (!_fs_fp && !setfsent() || !fstabscan()) 148 return((struct fstab *)NULL); 149 return(&_fs_fstab); 150 } 151 152 struct fstab * 153 getfsspec(name) 154 register const char *name; 155 { 156 if (setfsent()) 157 while (fstabscan()) 158 if (!strcmp(_fs_fstab.fs_spec, name)) 159 return(&_fs_fstab); 160 return((struct fstab *)NULL); 161 } 162 163 struct fstab * 164 getfsfile(name) 165 register const char *name; 166 { 167 if (setfsent()) 168 while (fstabscan()) 169 if (!strcmp(_fs_fstab.fs_file, name)) 170 return(&_fs_fstab); 171 return((struct fstab *)NULL); 172 } 173 174 setfsent() 175 { 176 if (_fs_fp) { 177 rewind(_fs_fp); 178 LineNo = 0; 179 return(1); 180 } 181 if (_fs_fp = fopen(_PATH_FSTAB, "r")) { 182 LineNo = 0; 183 return(1); 184 } 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 char *p; 203 char num[30]; 204 205 (void)write(STDERR_FILENO, "fstab: ", 7); 206 (void)write(STDERR_FILENO, _PATH_FSTAB, sizeof(_PATH_FSTAB) - 1); 207 (void)write(STDERR_FILENO, ":", 1); 208 sprintf(num, "%d: ", LineNo); 209 (void)write(STDERR_FILENO, num, strlen(num)); 210 p = strerror(err); 211 (void)write(STDERR_FILENO, p, strlen(p)); 212 (void)write(STDERR_FILENO, "\n", 1); 213 } 214