fstab.c revision 1.1.1.2
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 48 static error __P((int)); 49 static fstabscan __P((void)); 50 51 static 52 fstabscan() 53 { 54 register char *cp; 55 #define MAXLINELENGTH 1024 56 static char line[MAXLINELENGTH]; 57 char subline[MAXLINELENGTH]; 58 int typexx; 59 60 for (;;) { 61 if (!(cp = fgets(line, sizeof(line), _fs_fp))) 62 return(0); 63 /* OLD_STYLE_FSTAB */ 64 if (!strpbrk(cp, " \t")) { 65 _fs_fstab.fs_spec = strtok(cp, ":\n"); 66 _fs_fstab.fs_file = strtok((char *)NULL, ":\n"); 67 _fs_fstab.fs_type = strtok((char *)NULL, ":\n"); 68 if (_fs_fstab.fs_type) { 69 if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) 70 continue; 71 _fs_fstab.fs_mntops = _fs_fstab.fs_type; 72 _fs_fstab.fs_vfstype = 73 strcmp(_fs_fstab.fs_type, FSTAB_SW) ? 74 "ufs" : "swap"; 75 if (cp = strtok((char *)NULL, ":\n")) { 76 _fs_fstab.fs_freq = atoi(cp); 77 if (cp = strtok((char *)NULL, ":\n")) { 78 _fs_fstab.fs_passno = atoi(cp); 79 return(1); 80 } 81 } 82 } 83 goto bad; 84 } 85 /* OLD_STYLE_FSTAB */ 86 _fs_fstab.fs_spec = strtok(cp, " \t\n"); 87 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 88 continue; 89 _fs_fstab.fs_file = strtok((char *)NULL, " \t\n"); 90 _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n"); 91 _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n"); 92 if (_fs_fstab.fs_mntops == NULL) 93 goto bad; 94 _fs_fstab.fs_freq = 0; 95 _fs_fstab.fs_passno = 0; 96 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) { 97 _fs_fstab.fs_freq = atoi(cp); 98 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) 99 _fs_fstab.fs_passno = atoi(cp); 100 } 101 strcpy(subline, _fs_fstab.fs_mntops); 102 for (typexx = 0, cp = strtok(subline, ","); cp; 103 cp = strtok((char *)NULL, ",")) { 104 if (strlen(cp) != 2) 105 continue; 106 if (!strcmp(cp, FSTAB_RW)) { 107 _fs_fstab.fs_type = FSTAB_RW; 108 break; 109 } 110 if (!strcmp(cp, FSTAB_RQ)) { 111 _fs_fstab.fs_type = FSTAB_RQ; 112 break; 113 } 114 if (!strcmp(cp, FSTAB_RO)) { 115 _fs_fstab.fs_type = FSTAB_RO; 116 break; 117 } 118 if (!strcmp(cp, FSTAB_SW)) { 119 _fs_fstab.fs_type = FSTAB_SW; 120 break; 121 } 122 if (!strcmp(cp, FSTAB_XX)) { 123 _fs_fstab.fs_type = FSTAB_XX; 124 typexx++; 125 break; 126 } 127 } 128 if (typexx) 129 continue; 130 if (cp != NULL) 131 return(1); 132 133 bad: /* no way to distinguish between EOF and syntax error */ 134 error(EFTYPE); 135 } 136 /* NOTREACHED */ 137 } 138 139 struct fstab * 140 getfsent() 141 { 142 if (!_fs_fp && !setfsent() || !fstabscan()) 143 return((struct fstab *)NULL); 144 return(&_fs_fstab); 145 } 146 147 struct fstab * 148 getfsspec(name) 149 register const char *name; 150 { 151 if (setfsent()) 152 while (fstabscan()) 153 if (!strcmp(_fs_fstab.fs_spec, name)) 154 return(&_fs_fstab); 155 return((struct fstab *)NULL); 156 } 157 158 struct fstab * 159 getfsfile(name) 160 register const char *name; 161 { 162 if (setfsent()) 163 while (fstabscan()) 164 if (!strcmp(_fs_fstab.fs_file, name)) 165 return(&_fs_fstab); 166 return((struct fstab *)NULL); 167 } 168 169 setfsent() 170 { 171 if (_fs_fp) { 172 rewind(_fs_fp); 173 return(1); 174 } 175 if (_fs_fp = fopen(_PATH_FSTAB, "r")) 176 return(1); 177 error(errno); 178 return(0); 179 } 180 181 void 182 endfsent() 183 { 184 if (_fs_fp) { 185 (void)fclose(_fs_fp); 186 _fs_fp = NULL; 187 } 188 } 189 190 static 191 error(err) 192 int err; 193 { 194 char *p; 195 196 (void)write(STDERR_FILENO, "fstab: ", 7); 197 (void)write(STDERR_FILENO, _PATH_FSTAB, sizeof(_PATH_FSTAB) - 1); 198 (void)write(STDERR_FILENO, ": ", 1); 199 p = strerror(err); 200 (void)write(STDERR_FILENO, p, strlen(p)); 201 (void)write(STDERR_FILENO, "\n", 1); 202 } 203
Indexes created Tue Sep 30 20:09:53 GMT 2025