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 5.15 (Berkeley) 02/23/91"; 10 #endif /* LIBC_SCCS and not lint */ 11 12 #include <sys/errno.h> 13 #include <fstab.h> 14 #include <unistd.h> 15 #include <stdio.h> 16 #include <stdlib.h> 17 #include <string.h> 18 19 static FILE *_fs_fp; 20 static struct fstab _fs_fstab; 21 static error(); 22 23 static 24 fstabscan() 25 { 26 register char *cp; 27 #define MAXLINELENGTH 1024 28 static char line[MAXLINELENGTH]; 29 char subline[MAXLINELENGTH]; 30 int typexx; 31 32 for (;;) { 33 if (!(cp = fgets(line, sizeof(line), _fs_fp))) 34 return(0); 35 /* OLD_STYLE_FSTAB */ 36 if (!strpbrk(cp, " \t")) { 37 _fs_fstab.fs_spec = strtok(cp, ":\n"); 38 _fs_fstab.fs_file = strtok((char *)NULL, ":\n"); 39 _fs_fstab.fs_type = strtok((char *)NULL, ":\n"); 40 if (_fs_fstab.fs_type) { 41 if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) 42 continue; 43 _fs_fstab.fs_mntops = _fs_fstab.fs_type; 44 _fs_fstab.fs_vfstype = 45 strcmp(_fs_fstab.fs_type, FSTAB_SW) ? 46 "ufs" : "swap"; 47 if (cp = strtok((char *)NULL, ":\n")) { 48 _fs_fstab.fs_freq = atoi(cp); 49 if (cp = strtok((char *)NULL, ":\n")) { 50 _fs_fstab.fs_passno = atoi(cp); 51 return(1); 52 } 53 } 54 } 55 goto bad; 56 } 57 /* OLD_STYLE_FSTAB */ 58 _fs_fstab.fs_spec = strtok(cp, " \t\n"); 59 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 60 continue; 61 _fs_fstab.fs_file = strtok((char *)NULL, " \t\n"); 62 _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n"); 63 _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n"); 64 if (_fs_fstab.fs_mntops == NULL) 65 goto bad; 66 _fs_fstab.fs_freq = 0; 67 _fs_fstab.fs_passno = 0; 68 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) { 69 _fs_fstab.fs_freq = atoi(cp); 70 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) 71 _fs_fstab.fs_passno = atoi(cp); 72 } 73 strcpy(subline, _fs_fstab.fs_mntops); 74 for (typexx = 0, cp = strtok(subline, ","); cp; 75 cp = strtok((char *)NULL, ",")) { 76 if (strlen(cp) != 2) 77 continue; 78 if (!strcmp(cp, FSTAB_RW)) { 79 _fs_fstab.fs_type = FSTAB_RW; 80 break; 81 } 82 if (!strcmp(cp, FSTAB_RQ)) { 83 _fs_fstab.fs_type = FSTAB_RQ; 84 break; 85 } 86 if (!strcmp(cp, FSTAB_RO)) { 87 _fs_fstab.fs_type = FSTAB_RO; 88 break; 89 } 90 if (!strcmp(cp, FSTAB_SW)) { 91 _fs_fstab.fs_type = FSTAB_SW; 92 break; 93 } 94 if (!strcmp(cp, FSTAB_XX)) { 95 _fs_fstab.fs_type = FSTAB_XX; 96 typexx++; 97 break; 98 } 99 } 100 if (typexx) 101 continue; 102 if (cp != NULL) 103 return(1); 104 105 bad: /* no way to distinguish between EOF and syntax error */ 106 error(EFTYPE); 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 const 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 const 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 if (_fs_fp = fopen(_PATH_FSTAB, "r")) 148 return(1); 149 error(errno); 150 return(0); 151 } 152 153 void 154 endfsent() 155 { 156 if (_fs_fp) { 157 (void)fclose(_fs_fp); 158 _fs_fp = NULL; 159 } 160 } 161 162 static 163 error(err) 164 int err; 165 { 166 char *p; 167 168 (void)write(STDERR_FILENO, "fstab: ", 7); 169 (void)write(STDERR_FILENO, _PATH_FSTAB, sizeof(_PATH_FSTAB) - 1); 170 p = strerror(err); 171 (void)write(STDERR_FILENO, p, strlen(p)); 172 (void)write(STDERR_FILENO, "\n", 1); 173 } 174