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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990, 1991, 1997 SMI	*/
     23 /* All Rights Reserved							*/
     24 
     25 #ident	"%Z%%M%	%I%	%E% SMI"
     26 
     27 #include	<stdio.h>
     28 #include        <deflt.h>
     29 #include        <string.h>
     30 
     31 #define	LOCAL		"/etc/default/fs"
     32 #define	REMOTE		"/etc/dfs/fstypes"
     33 
     34 /*
     35  * This is used to figure out the default file system type if "-F FStype"
     36  * is not specified with the file system command and no entry in the
     37  * /etc/vfstab matches the specified special.
     38  * If the first character of the "special" is a "/" (eg, "/dev/dsk/c0d1s2"),
     39  * returns the default local filesystem type.
     40  * Otherwise (eg, "server:/path/name" or "resource"), returns the default
     41  * remote filesystem type.
     42  */
     43 char	*
     44 default_fstype(char *special)
     45 {
     46 	char	*deffs;
     47 	static	char	buf[BUFSIZ];
     48 	FILE	*fp;
     49 
     50 	if (*special == '/') {
     51 		if (defopen(LOCAL) != 0)
     52 			return ("ufs");
     53 		else {
     54 			if ((deffs = defread("LOCAL=")) == NULL) {
     55 				defopen(NULL);	/* close default file */
     56 				return ("ufs");
     57 			} else {
     58 				defopen(NULL);	/* close default file */
     59 				return (deffs);
     60 			}
     61 		}
     62 	} else {
     63 		if ((fp = fopen(REMOTE, "r")) == NULL)
     64 			return ("nfs");
     65 		else {
     66 			if (fgets(buf, sizeof (buf), fp) == NULL) {
     67 				fclose(fp);
     68 				return ("nfs");
     69 			} else {
     70 				deffs = strtok(buf, " \t\n");
     71 				fclose(fp);
     72 				return (deffs);
     73 			}
     74 		}
     75 	}
     76 }
     77