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

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18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26#include <sys/time.h>
27#include <err.h>
28#include <stdio.h>
29#include <stdlib.h>
30#include <string.h>
31#include <unistd.h>
32
33
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD: head/tools/regression/environ/timings.c 171195 2007-07-04 00:00:41Z scf $");
36
37
38const char value1[] = "Large ------------------ value";
39const char value2[] = "Small -- value";
40char nameValuePair[] = "less=more";
41const char name[] = "PATH";
42const char name2[] = "SHELL";
43const int MaxIterations = 1000000;

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59 (double)(endTime->tv_usec - startTime->tv_usec) / 1000000));
60}
61
62
63int
64main(int argc, char **argv)
65{
66 int iterations;
67 struct timeval endTime;
68 struct timeval startTime;
69
70 /*
71 * getenv() on the existing environment.
72 */
73 gettimeofday(&startTime, NULL);
74
75 /* Iterate over setting variable. */
76 for (iterations = 0; iterations < MaxIterations; iterations++)
77 if (getenv(name) == NULL)
78 err(EXIT_FAILURE, "getenv(name)");
79
80 gettimeofday(&endTime, NULL);
81
82 report_time("getenv(name)", &startTime, &endTime);
83
84
85 /*
86 * setenv() a variable with a large value.
87 */
88 gettimeofday(&startTime, NULL);
89
90 /* Iterate over setting variable. */
91 for (iterations = 0; iterations < MaxIterations; iterations++)
92 if (setenv(name, value1, 1) == -1)
93 err(EXIT_FAILURE, "setenv(name, value1, 1)");
94
95 gettimeofday(&endTime, NULL);
96
97 report_time("setenv(name, value1, 1)", &startTime, &endTime);
98
99
100 /*
101 * getenv() the new variable on the new environment.
102 */
103 gettimeofday(&startTime, NULL);
104
105 /* Iterate over setting variable. */
106 for (iterations = 0; iterations < MaxIterations; iterations++)
107 /* Set large value to variable. */
108 if (getenv(name) == NULL)
109 err(EXIT_FAILURE, "getenv(name)");
110
111 gettimeofday(&endTime, NULL);
112
113 report_time("getenv(name)", &startTime, &endTime);
114
115
116 /*
117 * getenv() a different variable on the new environment.
118 */
119 gettimeofday(&startTime, NULL);
120
121 /* Iterate over setting variable. */
122 for (iterations = 0; iterations < MaxIterations; iterations++)
123 /* Set large value to variable. */
124 if (getenv(name2) == NULL)
125 err(EXIT_FAILURE, "getenv(name2)");
126
127 gettimeofday(&endTime, NULL);
128
129 report_time("getenv(name2)", &startTime, &endTime);
130
131
132 /*
133 * setenv() a variable with a small value.
134 */
135 gettimeofday(&startTime, NULL);
136
137 /* Iterate over setting variable. */
138 for (iterations = 0; iterations < MaxIterations; iterations++)
139 if (setenv(name, value2, 1) == -1)
140 err(EXIT_FAILURE, "setenv(name, value2, 1)");
141
142 gettimeofday(&endTime, NULL);
143
144 report_time("setenv(name, value2, 1)", &startTime, &endTime);
145
146
147 /*
148 * getenv() a different variable on the new environment.
149 */
150 gettimeofday(&startTime, NULL);
151
152 /* Iterate over setting variable. */
153 for (iterations = 0; iterations < MaxIterations; iterations++)
154 /* Set large value to variable. */
155 if (getenv(name2) == NULL)
156 err(EXIT_FAILURE, "getenv(name)");
157
158 gettimeofday(&endTime, NULL);
159
160 report_time("getenv(name)", &startTime, &endTime);
161
162
163 /*
164 * getenv() a different variable on the new environment.
165 */
166 gettimeofday(&startTime, NULL);
167
168 /* Iterate over setting variable. */
169 for (iterations = 0; iterations < MaxIterations; iterations++)
170 /* Set large value to variable. */
171 if (getenv(name2) == NULL)
172 err(EXIT_FAILURE, "getenv(name2)");
173
174 gettimeofday(&endTime, NULL);
175
176 report_time("getenv(name2)", &startTime, &endTime);
177
178
179 /*
180 * putenv() a variable with a small value.
181 */
182 gettimeofday(&startTime, NULL);
183
184 /* Iterate over setting variable. */
185 for (iterations = 0; iterations < MaxIterations; iterations++)
186 if (putenv(nameValuePair) == -1)
187 err(EXIT_FAILURE, "putenv(nameValuePair)");
188
189 gettimeofday(&endTime, NULL);
190
191 report_time("putenv(nameValuePair)", &startTime, &endTime);
192
193
194 exit(EXIT_SUCCESS);
195}