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 5.10 (Berkeley) 05/10/90"; 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 1024 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 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 44 continue; 45 _fs_fstab.fs_file = strtok((char *)NULL, " \t\n"); 46 _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n"); 47 _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n"); 48 if (_fs_fstab.fs_mntops == NULL) 49 goto bad; 50 _fs_fstab.fs_freq = 0; 51 _fs_fstab.fs_passno = 0; 52 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) { 53 _fs_fstab.fs_freq = atoi(cp); 54 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) 55 _fs_fstab.fs_passno = atoi(cp); 56 } 57 strcpy(subline, _fs_fstab.fs_mntops); 58 for (typexx = 0, cp = strtok(subline, ","); cp; 59 cp = strtok((char *)NULL, ",")) { 60 if (strlen(cp) != 2) 61 continue; 62 if (!strcmp(cp, FSTAB_RW)) { 63 _fs_fstab.fs_type = FSTAB_RW; 64 break; 65 } 66 if (!strcmp(cp, FSTAB_RQ)) { 67 _fs_fstab.fs_type = FSTAB_RQ; 68 break; 69 } 70 if (!strcmp(cp, FSTAB_RO)) { 71 _fs_fstab.fs_type = FSTAB_RO; 72 break; 73 } 74 if (!strcmp(cp, FSTAB_SW)) { 75 _fs_fstab.fs_type = FSTAB_SW; 76 break; 77 } 78 if (!strcmp(cp, FSTAB_XX)) { 79 _fs_fstab.fs_type = FSTAB_XX; 80 typexx++; 81 break; 82 } 83 } 84 if (typexx) 85 continue; 86 if (cp != NULL) 87 return(1); 88 bad: 89 /* no way to distinguish between EOF and syntax error */ 90 (void)write(STDERR_FILENO, "fstab: ", 7); 91 (void)write(STDERR_FILENO, _PATH_FSTAB, 92 sizeof(_PATH_FSTAB) - 1); 93 (void)write(STDERR_FILENO, ": syntax error.\n", 16); 94 } 95 /* NOTREACHED */ 96 } 97 98 struct fstab * 99 getfsent() 100 { 101 if (!_fs_fp && !setfsent() || !fstabscan()) 102 return((struct fstab *)NULL); 103 return(&_fs_fstab); 104 } 105 106 struct fstab * 107 getfsspec(name) 108 register char *name; 109 { 110 if (setfsent()) 111 while (fstabscan()) 112 if (!strcmp(_fs_fstab.fs_spec, name)) 113 return(&_fs_fstab); 114 return((struct fstab *)NULL); 115 } 116 117 struct fstab * 118 getfsfile(name) 119 register char *name; 120 { 121 if (setfsent()) 122 while (fstabscan()) 123 if (!strcmp(_fs_fstab.fs_file, name)) 124 return(&_fs_fstab); 125 return((struct fstab *)NULL); 126 } 127 128 setfsent() 129 { 130 if (_fs_fp) { 131 rewind(_fs_fp); 132 return(1); 133 } 134 return((_fs_fp = fopen(_PATH_FSTAB, "r")) != NULL); 135 } 136 137 void 138 endfsent() 139 { 140 if (_fs_fp) { 141 (void)fclose(_fs_fp); 142 _fs_fp = NULL; 143 } 144 } 145