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 5.6 (Berkeley) 05/23/89"; 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 *fgets(), *strsep(); 36 37 for (;;) { 38 if (!(cp = fgets(line, sizeof(line), _fs_fp))) 39 return(0); 40 _fs_fstab.fs_spec = strsep(cp, ":\n"); 41 _fs_fstab.fs_file = strsep((char *)NULL, ":\n"); 42 _fs_fstab.fs_type = strsep((char *)NULL, ":\n"); 43 if (_fs_fstab.fs_type) { 44 if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) 45 continue; 46 if (cp = strsep((char *)NULL, ":\n")) { 47 _fs_fstab.fs_freq = atoi(cp); 48 if (cp = strsep((char *)NULL, ":\n")) { 49 _fs_fstab.fs_passno = atoi(cp); 50 return(1); 51 } 52 } 53 } 54 /* no way to distinguish between EOF and syntax error */ 55 (void)write(STDERR_FILENO, "fstab: ", 7); 56 (void)write(STDERR_FILENO, _PATH_FSTAB, 57 sizeof(_PATH_FSTAB) - 1); 58 (void)write(STDERR_FILENO, ": syntax error.\n", 16); 59 } 60 /* NOTREACHED */ 61 } 62 63 struct fstab * 64 getfsent() 65 { 66 if (!_fs_fp && !setfsent() || !fstabscan()) 67 return((struct fstab *)NULL); 68 return(&_fs_fstab); 69 } 70 71 struct fstab * 72 getfsspec(name) 73 register char *name; 74 { 75 if (setfsent()) 76 while (fstabscan()) 77 if (!strcmp(_fs_fstab.fs_spec, name)) 78 return(&_fs_fstab); 79 return((struct fstab *)NULL); 80 } 81 82 struct fstab * 83 getfsfile(name) 84 register char *name; 85 { 86 if (setfsent()) 87 while (fstabscan()) 88 if (!strcmp(_fs_fstab.fs_file, name)) 89 return(&_fs_fstab); 90 return((struct fstab *)NULL); 91 } 92 93 setfsent() 94 { 95 if (_fs_fp) { 96 rewind(_fs_fp); 97 return(1); 98 } 99 return((_fs_fp = fopen(_PATH_FSTAB, "r")) != NULL); 100 } 101 102 void 103 endfsent() 104 { 105 if (_fs_fp) { 106 (void)fclose(_fs_fp); 107 _fs_fp = NULL; 108 } 109 } 110