1/*	$NetBSD: pmon.c,v 1.5 2008/04/28 20:23:10 martin Exp $	*/
2
3/*-
4 * Copyright (c) 2001 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: pmon.c,v 1.5 2008/04/28 20:23:10 martin Exp $");
34
35#include <sys/param.h>
36#include <sys/systm.h>
37
38#include <machine/pmon.h>
39
40#ifdef _LP64
41static char *environ[64];
42#else
43static char **environ;
44#endif
45
46/*
47 * pmon_init:
48 *
49 *	Initialize the PMON interface.
50 */
51void
52pmon_init(char *envp[])
53{
54#ifdef _LP64
55	int32_t *envp32 = (void *) envp;
56
57	envp = environ;
58	if (envp32 != NULL) {
59		while (*envp32 != 0) {
60			KASSERT(envp - environ < __arraycount(environ));
61			*envp++ = (char *)(intptr_t)*envp32++;
62		}
63	}
64	KASSERT(envp - environ < __arraycount(environ));
65	*envp = NULL;
66#else
67	if (environ == NULL)
68		environ = envp;
69#endif
70#ifdef PMON_DEBUG
71	printf("pmon_init: environ = %p (%p)\n", environ, *environ);
72#endif
73}
74
75/*
76 * pmon_getenv:
77 *
78 *	Fetch an environment variable.
79 */
80const char *
81pmon_getenv(const char *var)
82{
83	const char *rv = NULL;
84	char **env = environ;
85	int i;
86
87	i = strlen(var);
88
89	while (*env != NULL) {
90#ifdef PMON_DEBUG
91		printf("pmon_getenv: %s\n", *env);
92#endif
93		if (strncasecmp(var, *env, i) == 0 &&
94		    (*env)[i] == '=') {
95			rv = &(*env)[i + 1];
96			break;
97		}
98		env++;
99	}
100
101	return (rv);
102}
103