GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/stdlib/getenv.c Lines: 13 14 92.9 %
Date: 2017-11-07 Branches: 14 18 77.8 %

Line Branch Exec Source
1
/*	$OpenBSD: getenv.c,v 1.12 2016/03/13 18:34:21 guenther Exp $ */
2
/*
3
 * Copyright (c) 1987, 1993
4
 *	The Regents of the University of California.  All rights reserved.
5
 *
6
 * Redistribution and use in source and binary forms, with or without
7
 * modification, are permitted provided that the following conditions
8
 * are met:
9
 * 1. Redistributions of source code must retain the above copyright
10
 *    notice, this list of conditions and the following disclaimer.
11
 * 2. Redistributions in binary form must reproduce the above copyright
12
 *    notice, this list of conditions and the following disclaimer in the
13
 *    documentation and/or other materials provided with the distribution.
14
 * 3. Neither the name of the University nor the names of its contributors
15
 *    may be used to endorse or promote products derived from this software
16
 *    without specific prior written permission.
17
 *
18
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28
 * SUCH DAMAGE.
29
 */
30
31
#include <stdlib.h>
32
#include <string.h>
33
34
35
/*
36
 * __findenv --
37
 *	Returns pointer to value associated with name, if any, else NULL.
38
 *	Starts searching within the environmental array at offset.
39
 *	Sets offset to be the offset of the name/value combination in the
40
 *	environmental array, for use by putenv(3), setenv(3) and unsetenv(3).
41
 *	Explicitly removes '=' in argument name.
42
 *
43
 *	This routine *should* be a static; don't use it.
44
 */
45
char *
46
__findenv(const char *name, int len, int *offset)
47
{
48
	int i;
49
	const char *np;
50
	char **p, *cp;
51
52
9461486
	if (name == NULL || environ == NULL)
53
		return (NULL);
54
240259702
	for (p = environ + *offset; (cp = *p) != NULL; ++p) {
55

352155886
		for (np = name, i = len; i && *cp; i--)
56
117384370
			if (*cp++ != *np++)
57
				break;
58

115401884
		if (i == 0 && *cp++ == '=') {
59
1388
			*offset = p - environ;
60
1388
			return (cp);
61
		}
62
	}
63
4729355
	return (NULL);
64
4730743
}
65
66
/*
67
 * getenv --
68
 *	Returns ptr to value associated with name, if any, else NULL.
69
 */
70
char *
71
getenv(const char *name)
72
{
73
9461486
	int offset = 0;
74
	const char *np;
75
76

189896378
	for (np = name; *np && *np != '='; ++np)
77
		;
78
9461486
	return (__findenv(name, (int)(np - name), &offset));
79
4730743
}
80
DEF_STRONG(getenv);