GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: sbin/newfs/../mount/getmntopts.c Lines: 0 47 0.0 %
Date: 2017-11-07 Branches: 0 42 0.0 %

Line Branch Exec Source
1
/*	$OpenBSD: getmntopts.c,v 1.12 2015/01/16 06:39:59 deraadt Exp $	*/
2
/*	$NetBSD: getmntopts.c,v 1.3 1995/03/18 14:56:58 cgd Exp $	*/
3
4
/*-
5
 * Copyright (c) 1994
6
 *	The Regents of the University of California.  All rights reserved.
7
 *
8
 * Redistribution and use in source and binary forms, with or without
9
 * modification, are permitted provided that the following conditions
10
 * are met:
11
 * 1. Redistributions of source code must retain the above copyright
12
 *    notice, this list of conditions and the following disclaimer.
13
 * 2. Redistributions in binary form must reproduce the above copyright
14
 *    notice, this list of conditions and the following disclaimer in the
15
 *    documentation and/or other materials provided with the distribution.
16
 * 3. Neither the name of the University nor the names of its contributors
17
 *    may be used to endorse or promote products derived from this software
18
 *    without specific prior written permission.
19
 *
20
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30
 * SUCH DAMAGE.
31
 */
32
33
#include <sys/types.h>
34
#include <sys/mount.h>
35
36
#include <err.h>
37
#include <errno.h>
38
#include <fstab.h>
39
#include <stdlib.h>
40
#include <string.h>
41
#include <limits.h>
42
43
#include "mntopts.h"
44
45
int
46
getmntopts(const char *optionp, const struct mntopt *m0, int *flagp)
47
{
48
	char *p, *q;
49
	union mntval val;
50
	int ret = 0;
51
52
	p = q = strdup(optionp);
53
	if (p == NULL)
54
		err(1, NULL);
55
	while (p != NULL) {
56
		ret |= getmntopt(&p, &val, m0, flagp);
57
	}
58
	free(q);
59
	return (ret);
60
}
61
62
int
63
getmntopt(char **optionp, union mntval *valuep, const struct mntopt *m0,
64
    int *flagp)
65
{
66
	const struct mntopt *m;
67
	char *opt, *value, *endp;
68
	long l;
69
	int inverse, negative, needval, ret = 0;
70
71
	/* Pull out the next option. */
72
	do {
73
		if (*optionp == NULL)
74
			return (0);
75
		opt = strsep(optionp, ",");
76
	} while (opt == NULL || *opt == '\0');
77
78
	/* Check for "no" prefix. */
79
	if (opt[0] == 'n' && opt[1] == 'o') {
80
		negative = 1;
81
		opt += 2;
82
	} else
83
		negative = 0;
84
85
	/* Stash the value for options with assignments in them. */
86
	if ((value = strchr(opt, '=')) != NULL)
87
		*value++ = '\0';
88
89
	/* Scan option table. */
90
	for (m = m0; m->m_option != NULL; ++m)
91
		if (strcasecmp(opt, m->m_option) == 0)
92
			break;
93
94
	/* Save flag, or fail if option is not recognised. */
95
	if (m->m_option) {
96
		needval = (m->m_oflags & (MFLAG_INTVAL|MFLAG_STRVAL)) != 0;
97
		if (needval != (value != NULL) && !(m->m_oflags & MFLAG_OPT))
98
			errx(1, "-o %s: option %s a value", opt,
99
			    needval ? "needs" : "does not need");
100
		inverse = (m->m_oflags & MFLAG_INVERSE) ? 1 : 0;
101
		if (m->m_oflags & MFLAG_SET) {
102
			if (negative == inverse)
103
				*flagp |= m->m_flag;
104
			else
105
				*flagp &= ~m->m_flag;
106
		}
107
		else if (negative == inverse)
108
			ret = m->m_flag;
109
	} else
110
		errx(1, "-o %s: option not supported", opt);
111
112
	/* Store the value for options with assignments in them. */
113
	if (value != NULL) {
114
		if (m->m_oflags & MFLAG_INTVAL) {
115
			errno = 0;
116
			l = strtol(value, &endp, 10);
117
			if (endp == value || l < 0 || l > INT_MAX ||
118
			    (l == LONG_MAX && errno == ERANGE))
119
				errx(1, "%s: illegal value '%s'",
120
				    opt, value);
121
			valuep->ival = (int)l;
122
		} else
123
			valuep->strval = value;
124
	} else
125
		memset(valuep, 0, sizeof(*valuep));
126
	return (ret);
127
}