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
23/*
24 * Copyright 2015 Nexenta Systems, Inc.  All rights reserved.
25 */
26
27/* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990, 1991, 1997 SMI	*/
28/* All Rights Reserved							*/
29
30#include <stdio.h>
31#include <deflt.h>
32#include <string.h>
33
34#define	LOCAL		"/etc/default/fs"
35#define	REMOTE		"/etc/dfs/fstypes"
36
37/*
38 * This is used to figure out the default file system type if "-F FStype"
39 * is not specified with the file system command and no entry in the
40 * /etc/vfstab matches the specified special.
41 * If the first character of the "special" is a "/" (eg, "/dev/dsk/c0d1s2"),
42 * returns the default local filesystem type.
43 * Otherwise (eg, "server:/path/name" or "resource"), returns the default
44 * remote filesystem type.
45 */
46char	*
47default_fstype(char *special)
48{
49	char	*deffs = NULL;
50	static	char	buf[BUFSIZ];
51	FILE	*fp;
52
53	if (*special == '/') {
54		if (defopen(LOCAL) == 0) {
55			deffs = defread("LOCAL=");
56			defopen(NULL);	/* close default file */
57		}
58	} else {
59		if ((fp = fopen(REMOTE, "r")) != NULL) {
60			if (fgets(buf, sizeof (buf), fp) != NULL)
61				deffs = strtok(buf, " \t\n");
62			fclose(fp);
63		}
64		if (deffs == NULL)
65			deffs = "nfs";
66	}
67
68	return (deffs != NULL ? deffs : "ufs");
69}
70