1 /* $NetBSD: pmon.c,v 1.6 2009/12/14 00:45:59 matt 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 1.6 2009/12/14 00:45:59 matt Exp $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37
38 #include <machine/pmon.h>
39
40 #ifdef _LP64
41 static char *environ[64];
42 #else
43 static char **environ;
44 #endif
45
46 /*
47 * pmon_init:
48 *
49 * Initialize the PMON interface.
50 */
51 void
pmon_init(char * envp[])52 pmon_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 */
80 const char *
pmon_getenv(const char * var)81 pmon_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