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DEFINITIONS
This source file includes following definitions.
- spawnv
- waitall
- hog
- cat
- main
1 /*
2 * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
3 * The President and Fellows of Harvard College.
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 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 /*
31 * farm.c
32 *
33 * Run a bunch of cpu pigs and one cat.
34 * The file it cats is "catfile". This should be created in advance.
35 *
36 * This test should itself run correctly when the basic system calls
37 * are complete. It may be helpful for scheduler performance analysis.
38 */
39
40 #include <unistd.h>
41 #include <err.h>
42
43 static char *hargv[2] = { (char *)"hog", NULL };
44 static char *cargv[3] = { (char *)"cat", (char *)"catfile", NULL };
45
46 #define MAXPROCS 6
47 static int pids[MAXPROCS], npids;
48
49 static
50 void
51 spawnv(const char *prog, char **argv)
52 {
53 int pid = fork();
54 switch (pid) {
55 case -1:
56 err(1, "fork");
57 case 0:
58 /* child */
59 execv(prog, argv);
60 err(1, "%s", prog);
61 default:
62 /* parent */
63 pids[npids++] = pid;
64 break;
65 }
66 }
67
68 static
69 void
70 waitall(void)
71 {
72 int i, status;
73 for (i=0; i<npids; i++) {
74 if (waitpid(pids[i], &status, 0)<0) {
75 warn("waitpid for %d", pids[i]);
76 }
77 else if (WIFSIGNALED(status)) {
78 warnx("pid %d: signal %d", pids[i], WTERMSIG(status));
79 }
80 else if (WEXITSTATUS(status) != 0) {
81 warnx("pid %d: exit %d", pids[i], WEXITSTATUS(status));
82 }
83 }
84 }
85
86 static
87 void
88 hog(void)
89 {
90 spawnv("/testbin/hog", hargv);
91 }
92
93 static
94 void
95 cat(void)
96 {
97 spawnv("/bin/cat", cargv);
98 }
99
100 int
101 main()
102 {
103 hog();
104 hog();
105 hog();
106 cat();
107
108 waitall();
109
110 return 0;
111 }