1/*-
2 * Copyright (c) 2007 Sean C. Farley <scf@FreeBSD.org>
3 * 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 *    without modification, immediately at the beginning of the file.
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 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26#include <stdio.h>
27#include <stdlib.h>
28#include <string.h>
29
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD$");
33
34
35extern char **environ;
36const char *envName = "FOOBAR";
37const char *envValSmall = "Hi";
38const char *envValLarge = "Hi, again";
39const char *envValAny = "Any value";
40
41
42int
43main(int argc, char **argv)
44{
45	const char *env1 = NULL;
46	const char *env2 = NULL;
47	const char *env3 = NULL;
48	const char *env4 = NULL;
49	const char *env5 = NULL;
50	int testNdx;
51
52	/* Clean slate. */
53	environ = NULL;
54	testNdx = 0;
55
56	/* Initial value of variable. */
57	if (getenv(envName) != NULL)
58		printf("not ");
59	printf("ok %d - getenv(\"%s\")\n", ++testNdx, envName);
60
61	/* Set value of variable to smaller value and get value. */
62	if ((setenv(envName, envValSmall, 1) != 0) ||
63	    ((env1 = getenv(envName)) == NULL) ||
64	    (strcmp(env1, envValSmall) != 0))
65		printf("not ");
66	printf("ok %d - setenv(\"%s\", \"%s\", 1)\n", ++testNdx, envName,
67	    envValSmall);
68
69	/* Unset variable. */
70	if ((unsetenv(envName) == -1) || ((env2 = getenv(envName)) != NULL))
71		printf("not ");
72	printf("ok %d - unsetenv(\"%s\")\n", ++testNdx, envName);
73
74	/* Set variable to bigger value and get value. */
75	if ((setenv(envName, envValLarge, 1) != 0) ||
76	    ((env3 = getenv(envName)) == NULL) ||
77	    (strcmp(env3, envValLarge) != 0))
78		printf("not ");
79	printf("ok %d - setenv(\"%s\", \"%s\", 1)\n", ++testNdx, envName,
80	    envValLarge);
81
82	/* Set variable to smaller value and get value. */
83	if ((setenv(envName, envValSmall, 1) != 0) ||
84	    ((env4 = getenv(envName)) == NULL) ||
85	    (strcmp(env4, envValSmall) != 0))
86		printf("not ");
87	printf("ok %d - setenv(\"%s\", \"%s\", 1)\n", ++testNdx, envName,
88	    envValSmall);
89
90	/* Set variable to any value without overwrite and get value. */
91	if ((setenv(envName, envValAny, 0) != 0) ||
92	    ((env5 = getenv(envName)) == NULL) ||
93	    (strcmp(env5, envValAny) == 0))
94		printf("not ");
95	printf("ok %d - setenv(\"%s\", \"%s\", 0)\n", ++testNdx, envName,
96	    envValAny);
97
98	/*
99	 * Verify FreeBSD-ism about allowing a program to keep old pointers without
100	 * risk of segfaulting.
101	 */
102	if ((strcmp(env1, envValSmall) != 0) ||
103	    (strcmp(env3, envValSmall) != 0) ||
104	    (strcmp(env4, envValSmall) != 0))
105		printf("not ");
106	printf("ok %d - old variables point to valid memory\n", ++testNdx);
107
108	exit(EXIT_SUCCESS);
109}
110