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 5.14 (Berkeley) 11/28/90"; 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 <string.h> 17 18 static FILE *_fs_fp; 19 static struct fstab _fs_fstab; 20 21 static 22 fstabscan() 23 { 24 register char *cp; 25 #define MAXLINELENGTH 1024 26 static char line[MAXLINELENGTH]; 27 char subline[MAXLINELENGTH]; 28 char *fgets(), *strtok(); 29 int typexx; 30 31 for (;;) { 32 if (!(cp = fgets(line, sizeof(line), _fs_fp))) 33 return(0); 34 /* OLD_STYLE_FSTAB */ 35 if (!strpbrk(cp, " \t")) { 36 _fs_fstab.fs_spec = strtok(cp, ":\n"); 37 _fs_fstab.fs_file = strtok((char *)NULL, ":\n"); 38 _fs_fstab.fs_type = strtok((char *)NULL, ":\n"); 39 if (_fs_fstab.fs_type) { 40 if (!strcmp(_fs_fstab.fs_type, FSTAB_XX)) 41 continue; 42 _fs_fstab.fs_mntops = _fs_fstab.fs_type; 43 _fs_fstab.fs_vfstype = 44 strcmp(_fs_fstab.fs_type, FSTAB_SW) ? 45 "ufs" : "swap"; 46 if (cp = strtok((char *)NULL, ":\n")) { 47 _fs_fstab.fs_freq = atoi(cp); 48 if (cp = strtok((char *)NULL, ":\n")) { 49 _fs_fstab.fs_passno = atoi(cp); 50 return(1); 51 } 52 } 53 } 54 goto bad; 55 } 56 /* OLD_STYLE_FSTAB */ 57 _fs_fstab.fs_spec = strtok(cp, " \t\n"); 58 if (!_fs_fstab.fs_spec || *_fs_fstab.fs_spec == '#') 59 continue; 60 _fs_fstab.fs_file = strtok((char *)NULL, " \t\n"); 61 _fs_fstab.fs_vfstype = strtok((char *)NULL, " \t\n"); 62 _fs_fstab.fs_mntops = strtok((char *)NULL, " \t\n"); 63 if (_fs_fstab.fs_mntops == NULL) 64 goto bad; 65 _fs_fstab.fs_freq = 0; 66 _fs_fstab.fs_passno = 0; 67 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) { 68 _fs_fstab.fs_freq = atoi(cp); 69 if ((cp = strtok((char *)NULL, " \t\n")) != NULL) 70 _fs_fstab.fs_passno = atoi(cp); 71 } 72 strcpy(subline, _fs_fstab.fs_mntops); 73 for (typexx = 0, cp = strtok(subline, ","); cp; 74 cp = strtok((char *)NULL, ",")) { 75 if (strlen(cp) != 2) 76 continue; 77 if (!strcmp(cp, FSTAB_RW)) { 78 _fs_fstab.fs_type = FSTAB_RW; 79 break; 80 } 81 if (!strcmp(cp, FSTAB_RQ)) { 82 _fs_fstab.fs_type = FSTAB_RQ; 83 break; 84 } 85 if (!strcmp(cp, FSTAB_RO)) { 86 _fs_fstab.fs_type = FSTAB_RO; 87 break; 88 } 89 if (!strcmp(cp, FSTAB_SW)) { 90 _fs_fstab.fs_type = FSTAB_SW; 91 break; 92 } 93 if (!strcmp(cp, FSTAB_XX)) { 94 _fs_fstab.fs_type = FSTAB_XX; 95 typexx++; 96 break; 97 } 98 } 99 if (typexx) 100 continue; 101 if (cp != NULL) 102 return(1); 103 104 bad: /* no way to distinguish between EOF and syntax error */ 105 write(EFTYPE); 106 } 107 /* NOTREACHED */ 108 } 109 110 struct fstab * 111 getfsent() 112 { 113 if (!_fs_fp && !setfsent() || !fstabscan()) 114 return((struct fstab *)NULL); 115 return(&_fs_fstab); 116 } 117 118 struct fstab * 119 getfsspec(name) 120 register char *name; 121 { 122 if (setfsent()) 123 while (fstabscan()) 124 if (!strcmp(_fs_fstab.fs_spec, name)) 125 return(&_fs_fstab); 126 return((struct fstab *)NULL); 127 } 128 129 struct fstab * 130 getfsfile(name) 131 register char *name; 132 { 133 if (setfsent()) 134 while (fstabscan()) 135 if (!strcmp(_fs_fstab.fs_file, name)) 136 return(&_fs_fstab); 137 return((struct fstab *)NULL); 138 } 139 140 setfsent() 141 { 142 if (_fs_fp) { 143 rewind(_fs_fp); 144 return(1); 145 } 146 if (_fs_fp = fopen(_PATH_FSTAB, "r")) 147 return(1); 148 error(errno); 149 return(0); 150 } 151 152 void 153 endfsent() 154 { 155 if (_fs_fp) { 156 (void)fclose(_fs_fp); 157 _fs_fp = NULL; 158 } 159 } 160 161 static 162 error(err) 163 int err; 164 { 165 char *p; 166 167 (void)write(STDERR_FILENO, "fstab: ", 7); 168 (void)write(STDERR_FILENO, _PATH_FSTAB, sizeof(_PATH_FSTAB) - 1); 169 p = strerror(err); 170 (void)write(STDERR_FILENO, p, strlen(p)); 171 (void)write(STDERR_FILENO, "\n", 1); 172 } 173