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>
32extern char **environ;
33const char *envName = "FOOBAR";
34const char *envValSmall = "Hi";
35const char *envValLarge = "Hi, again";
36const char *envValAny = "Any value";
37
38
39int
40main(int argc, char **argv)
41{
42	const char *env1 = NULL;
43	const char *env2 = NULL;
44	const char *env3 = NULL;
45	const char *env4 = NULL;
46	const char *env5 = NULL;
47	int testNdx;
48
49	/* Clean slate. */
50	environ = NULL;
51	testNdx = 0;
52
53	/* Initial value of variable. */
54	if (getenv(envName) != NULL)
55		printf("not ");
56	printf("ok %d - getenv(\"%s\")\n", ++testNdx, envName);
57
58	/* Set value of variable to smaller value and get value. */
59	if ((setenv(envName, envValSmall, 1) != 0) ||
60	    ((env1 = getenv(envName)) == NULL) ||
61	    (strcmp(env1, envValSmall) != 0))
62		printf("not ");
63	printf("ok %d - setenv(\"%s\", \"%s\", 1)\n", ++testNdx, envName,
64	    envValSmall);
65
66	/* Unset variable. */
67	if ((unsetenv(envName) == -1) || ((env2 = getenv(envName)) != NULL))
68		printf("not ");
69	printf("ok %d - unsetenv(\"%s\")\n", ++testNdx, envName);
70
71	/* Set variable to bigger value and get value. */
72	if ((setenv(envName, envValLarge, 1) != 0) ||
73	    ((env3 = getenv(envName)) == NULL) ||
74	    (strcmp(env3, envValLarge) != 0))
75		printf("not ");
76	printf("ok %d - setenv(\"%s\", \"%s\", 1)\n", ++testNdx, envName,
77	    envValLarge);
78
79	/* Set variable to smaller value and get value. */
80	if ((setenv(envName, envValSmall, 1) != 0) ||
81	    ((env4 = getenv(envName)) == NULL) ||
82	    (strcmp(env4, envValSmall) != 0))
83		printf("not ");
84	printf("ok %d - setenv(\"%s\", \"%s\", 1)\n", ++testNdx, envName,
85	    envValSmall);
86
87	/* Set variable to any value without overwrite and get value. */
88	if ((setenv(envName, envValAny, 0) != 0) ||
89	    ((env5 = getenv(envName)) == NULL) ||
90	    (strcmp(env5, envValAny) == 0))
91		printf("not ");
92	printf("ok %d - setenv(\"%s\", \"%s\", 0)\n", ++testNdx, envName,
93	    envValAny);
94
95	/*
96	 * Verify FreeBSD-ism about allowing a program to keep old pointers without
97	 * risk of segfaulting.
98	 */
99	if ((strcmp(env1, envValSmall) != 0) ||
100	    (strcmp(env3, envValSmall) != 0) ||
101	    (strcmp(env4, envValSmall) != 0))
102		printf("not ");
103	printf("ok %d - old variables point to valid memory\n", ++testNdx);
104
105	exit(EXIT_SUCCESS);
106}
107