getmntopts.c revision 4065 
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
49int getmnt_silent = 0;
50
51void
52getmntopts(options, m0, flagp, altflagp)
53	const char *options;
54	const struct mntopt *m0;
55	int *flagp;
56	int *altflagp;
57{
58	const struct mntopt *m;
59	int negative, len;
60	char *opt, *optbuf;
61	int *thisflagp;
62
63	/* Copy option string, since it is about to be torn asunder... */
64	if ((optbuf = strdup(options)) == NULL)
65		err(1, NULL);
66
67	for (opt = optbuf; (opt = strtok(opt, ",")) != NULL; opt = NULL) {
68		/* Check for "no" prefix. */
69		if (opt[0] == 'n' && opt[1] == 'o') {
70			negative = 1;
71			opt += 2;
72		} else
73			negative = 0;
74
75		/* Scan option table. */
76		for (m = m0; m->m_option != NULL; ++m) {
77			len = strlen(m->m_option);
78			if (strncasecmp(opt, m->m_option, len) == 0)
79				if (   m->m_option[len]	== '\0'
80				    || m->m_option[len]	== '='
81				   )
82				break;
83		}
84
85		/* Save flag, or fail if option is not recognised. */
86		if (m->m_option) {
87			thisflagp = m->m_altloc ? altflagp : flagp;
88			if (negative == m->m_inverse)
89				*thisflagp |= m->m_flag;
90			else
91				*thisflagp &= ~m->m_flag;
92		} else if(!getmnt_silent) {
93			errx(1, "-o %s: option not supported", opt);
94		}
95	}
96
97	free(optbuf);
98}
99