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 are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #if defined(LIBC_SCCS) && !defined(lint) 19 static char sccsid[] = "@(#)fstab.c 5.8 (Berkeley) 08/21/89"; 20 #endif /* LIBC_SCCS and not lint */ 21 22 #include <fstab.h> 23 #include <unistd.h> 24 #include <stdio.h> 25 26 static FILE *_fs_fp; 27 static struct fstab _fs_fstab; 28 29 static 30 fstabscan() 31 { 32 register char *cp; 33 #define MAXLINELENGTH 100 34 static char line[MAXLINELENGTH]; 35 char subline[MAXLINELENGTH]; 36 char *fgets(), *strtok(); 37 int typexx; 38 39 for (;;) { 40 if (!(cp = fgets(line, sizeof(line), _fs_fp))) 41 return(0); 42 _fs_fstab.fs_spec = strtok(cp, " \t\n"); 43 _fs_fstab.fs_file = strtok((char *)NULL, " \t\n"); 44 _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n"); 45 _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n"); 46 if (_fs_fstab.fs_mntops == NULL) 47 goto bad; 48 _fs_fstab.fs_freq = 0; 49 _fs_fstab.fs_passno = 0; 50 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) { 51 _fs_fstab.fs_freq = atoi(cp); 52 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) 53 _fs_fstab.fs_passno = atoi(cp); 54 } 55 strcpy(subline, _fs_fstab.fs_mntops); 56 for (typexx = 0, cp = strtok(subline, ","); cp; 57 cp = strtok((char *)NULL, ",")) { 58 if (strlen(cp) != 2) 59 continue; 60 if (!strcmp(cp, FSTAB_RW)) { 61 _fs_fstab.fs_type = FSTAB_RW; 62 break; 63 } 64 if (!strcmp(cp, FSTAB_RQ)) { 65 _fs_fstab.fs_type = FSTAB_RQ; 66 break; 67 } 68 if (!strcmp(cp, FSTAB_RO)) { 69 _fs_fstab.fs_type = FSTAB_RO; 70 break; 71 } 72 if (!strcmp(cp, FSTAB_SW)) { 73 _fs_fstab.fs_type = FSTAB_SW; 74 break; 75 } 76 if (!strcmp(cp, FSTAB_XX)) { 77 _fs_fstab.fs_type = FSTAB_XX; 78 typexx++; 79 break; 80 } 81 } 82 if (typexx) 83 continue; 84 if (cp != NULL) 85 return(1); 86 bad: 87 /* no way to distinguish between EOF and syntax error */ 88 (void)write(STDERR_FILENO, "fstab: ", 7); 89 (void)write(STDERR_FILENO, _PATH_FSTAB, 90 sizeof(_PATH_FSTAB) - 1); 91 (void)write(STDERR_FILENO, ": syntax error.\n", 16); 92 } 93 /* NOTREACHED */ 94 } 95 96 struct fstab * 97 getfsent() 98 { 99 if (!_fs_fp && !setfsent() || !fstabscan()) 100 return((struct fstab *)NULL); 101 return(&_fs_fstab); 102 } 103 104 struct fstab * 105 getfsspec(name) 106 register char *name; 107 { 108 if (setfsent()) 109 while (fstabscan()) 110 if (!strcmp(_fs_fstab.fs_spec, name)) 111 return(&_fs_fstab); 112 return((struct fstab *)NULL); 113 } 114 115 struct fstab * 116 getfsfile(name) 117 register char *name; 118 { 119 if (setfsent()) 120 while (fstabscan()) 121 if (!strcmp(_fs_fstab.fs_file, name)) 122 return(&_fs_fstab); 123 return((struct fstab *)NULL); 124 } 125 126 setfsent() 127 { 128 if (_fs_fp) { 129 rewind(_fs_fp); 130 return(1); 131 } 132 return((_fs_fp = fopen(_PATH_FSTAB, "r")) != NULL); 133 } 134 135 void 136 endfsent() 137 { 138 if (_fs_fp) { 139 (void)fclose(_fs_fp); 140 _fs_fp = NULL; 141 } 142 } 143