1/*
2 *   Copyright (c) International Business Machines  Corp., 2001
3 *
4 *   This program is free software;  you can redistribute it and/or modify
5 *   it under the terms of the GNU General Public License as published by
6 *   the Free Software Foundation; either version 2 of the License, or
7 *   (at your option) any later version.
8 *
9 *   This program is distributed in the hope that it will be useful,
10 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
11 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
12 *   the GNU General Public License for more details.
13 *
14 *   You should have received a copy of the GNU General Public License
15 *   along with this program;  if not, write to the Free Software
16 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * NAME
19 *	fork06.c
20 *
21 * DESCRIPTION
22 *	Test that a process can fork children a large number of
23 *	times in succession
24 *
25 * ALGORITHM
26 *	Attempt to fork a child that exits immediately
27 *	Repeat it many times(1000), counting the number of successes and
28 *	failures
29 *
30 * USAGE
31 *	fork06
32 *
33 * HISTORY
34 *	07/2001 Ported by Wayne Boyer
35 *
36 * RESTRICTIONS
37 *	None
38 */
39
40#include <sys/types.h>
41#include <sys/wait.h>
42#include <stdio.h>
43#include "test.h"
44
45char *TCID = "fork06";
46int TST_TOTAL = 1;
47
48static void setup(void);
49static void cleanup(void);
50
51#define NUMFORKS 1000
52
53int main(int ac, char **av)
54{
55	int i, pid, status, childpid, succeed, fail;
56
57	int lc;
58
59	tst_parse_opts(ac, av, NULL, NULL);
60
61	setup();
62
63	for (lc = 0; TEST_LOOPING(lc); lc++) {
64		tst_count = 0;
65		succeed = 0;
66		fail = 0;
67
68		for (i = 0; i < NUMFORKS; i++) {
69			pid = fork();
70			if (pid == -1) {
71				fail++;
72				continue;
73			}
74
75			if (pid == 0)
76				_exit(0);
77
78			childpid = wait(&status);
79			if (pid != childpid)
80				tst_resm(TFAIL, "pid from wait %d", childpid);
81			succeed++;
82		}
83
84		tst_resm(TINFO, "tries %d", i);
85		tst_resm(TINFO, "successes %d", succeed);
86		tst_resm(TINFO, "failures %d", fail);
87
88		if ((wait(&status)) == -1)
89			tst_resm(TINFO, "There were no children to wait for");
90		else
91			tst_resm(TINFO, "There were children left");
92	}
93
94	cleanup();
95	tst_exit();
96}
97
98static void setup(void)
99{
100	tst_sig(FORK, DEF_HANDLER, cleanup);
101	TEST_PAUSE;
102}
103
104static void cleanup(void)
105{
106}
107