getmntopts.c revision 3202 
1/*-
2 * Copyright (c) 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static char sccsid[] = "@(#)getmntopts.c	8.1 (Berkeley) 3/27/94";
36#endif /* not lint */
37
38#include <sys/param.h>
39#include <sys/mount.h>
40
41#include <err.h>
42#include <errno.h>
43#include <fstab.h>
44#include <stdlib.h>
45#include <string.h>
46
47#include "mntopts.h"
48
49void
50getmntopts(options, m0, flagp)
51	const char *options;
52	const struct mntopt *m0;
53	int *flagp;
54{
55	const struct mntopt *m;
56	int negative, len;
57	char *opt, *optbuf;
58
59	/* Copy option string, since it is about to be torn asunder... */
60	if ((optbuf = strdup(options)) == NULL)
61		err(1, NULL);
62
63	for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
64		/* Check for "no" prefix. */
65		if (opt[0] == 'n' && opt[1] == 'o') {
66			negative = 1;
67			opt += 2;
68		} else
69			negative = 0;
70
71		/* Scan option table. */
72		for (m = m0; m->m_option != NULL; ++m) {
73			len = strlen(m->m_option);
74			if (strncasecmp(opt, m->m_option, len) == 0)
75				if (   m->m_option[len]	== '\0'
76				    || m->m_option[len]	== '='
77				   )
78				break;
79		}
80
81		/* Save flag, or fail if option is not recognised. */
82		if (m->m_option) {
83			if (negative == m->m_inverse)
84				*flagp |= m->m_flag;
85			else
86				*flagp &= ~m->m_flag;
87		} else
88			errx(1, "-o %s: option not supported", opt);
89	}
90
91	free(optbuf);
92}
93