1 /* 2 * Copyright (c) 1980, 1988 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #if defined(LIBC_SCCS) && !defined(lint) 9 static char sccsid[] = "@(#)fstab.c 5.12 (Berkeley) 09/24/90"; 10 #endif /* LIBC_SCCS and not lint */ 11 12 #include <fstab.h> 13 #include <unistd.h> 14 #include <stdio.h> 15 16 static FILE *_fs_fp; 17 static struct fstab _fs_fstab; 18 19 static 20 fstabscan() 21 { 22 register char *cp; 23 #define MAXLINELENGTH 1024 24 static char line[MAXLINELENGTH]; 25 char subline[MAXLINELENGTH]; 26 char *fgets(), *strtok(); 27 int typexx; 28 29 for (;;) { 30 if (!(cp = fgets(line, sizeof(line), _fs_fp))) 31 return(0); 32 /* OLD_STYLE_FSTAB */ 33 if (!strpbrk(cp, " \t")) { 34 _fs_fstab.fs_spec = strtok(cp, ":\n"); 35 _fs_fstab.fs_file = strtok((char *)NULL, ":\n"); 36 _fs_fstab.fs_type = strtok((char *)NULL, ":\n"); 37 if (_fs_fstab.fs_type) { 38 if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) 39 continue; 40 _fs_fstab.fs_mntops = _fs_fstab.fs_type; 41 _fs_fstab.fs_vfstype = 42 strcmp(_fs_fstab.fs_type, FSTAB_SW) ? 43 "ufs" : "swap"; 44 if (cp = strtok((char *)NULL, ":\n")) { 45 _fs_fstab.fs_freq = atoi(cp); 46 if (cp = strtok((char *)NULL, ":\n")) { 47 _fs_fstab.fs_passno = atoi(cp); 48 return(1); 49 } 50 } 51 } 52 goto bad; 53 } 54 /* OLD_STYLE_FSTAB */ 55 _fs_fstab.fs_spec = strtok(cp, " \t\n"); 56 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 57 continue; 58 _fs_fstab.fs_file = strtok((char *)NULL, " \t\n"); 59 _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n"); 60 _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n"); 61 if (_fs_fstab.fs_mntops == NULL) 62 goto bad; 63 _fs_fstab.fs_freq = 0; 64 _fs_fstab.fs_passno = 0; 65 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) { 66 _fs_fstab.fs_freq = atoi(cp); 67 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) 68 _fs_fstab.fs_passno = atoi(cp); 69 } 70 strcpy(subline, _fs_fstab.fs_mntops); 71 for (typexx = 0, cp = strtok(subline, ","); cp; 72 cp = strtok((char *)NULL, ",")) { 73 if (strlen(cp) != 2) 74 continue; 75 if (!strcmp(cp, FSTAB_RW)) { 76 _fs_fstab.fs_type = FSTAB_RW; 77 break; 78 } 79 if (!strcmp(cp, FSTAB_RQ)) { 80 _fs_fstab.fs_type = FSTAB_RQ; 81 break; 82 } 83 if (!strcmp(cp, FSTAB_RO)) { 84 _fs_fstab.fs_type = FSTAB_RO; 85 break; 86 } 87 if (!strcmp(cp, FSTAB_SW)) { 88 _fs_fstab.fs_type = FSTAB_SW; 89 break; 90 } 91 if (!strcmp(cp, FSTAB_XX)) { 92 _fs_fstab.fs_type = FSTAB_XX; 93 typexx++; 94 break; 95 } 96 } 97 if (typexx) 98 continue; 99 if (cp != NULL) 100 return(1); 101 102 bad: /* no way to distinguish between EOF and syntax error */ 103 (void)write(STDERR_FILENO, "fstab: ", 7); 104 (void)write(STDERR_FILENO, _PATH_FSTAB, 105 sizeof(_PATH_FSTAB) - 1); 106 (void)write(STDERR_FILENO, ": syntax error.\n", 16); 107 } 108 /* NOTREACHED */ 109 } 110 111 struct fstab * 112 getfsent() 113 { 114 if (!_fs_fp && !setfsent() || !fstabscan()) 115 return((struct fstab *)NULL); 116 return(&_fs_fstab); 117 } 118 119 struct fstab * 120 getfsspec(name) 121 register char *name; 122 { 123 if (setfsent()) 124 while (fstabscan()) 125 if (!strcmp(_fs_fstab.fs_spec, name)) 126 return(&_fs_fstab); 127 return((struct fstab *)NULL); 128 } 129 130 struct fstab * 131 getfsfile(name) 132 register char *name; 133 { 134 if (setfsent()) 135 while (fstabscan()) 136 if (!strcmp(_fs_fstab.fs_file, name)) 137 return(&_fs_fstab); 138 return((struct fstab *)NULL); 139 } 140 141 setfsent() 142 { 143 if (_fs_fp) { 144 rewind(_fs_fp); 145 return(1); 146 } 147 return((_fs_fp = fopen(_PATH_FSTAB, "r")) != NULL); 148 } 149 150 void 151 endfsent() 152 { 153 if (_fs_fp) { 154 (void)fclose(_fs_fp); 155 _fs_fp = NULL; 156 } 157 } 158