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  *
19  * NAME
20  *	fork11.c
21  *
22  * DESCRIPTION
23  *	Test that parent gets a pid from each child when doing wait
24  *
25  * ALGORITHM
26  *	Fork NUMFORKS children that do nothing.
27  *
28  * USAGE
29  *	fork11
30  *
31  * HISTORY
32  *	07/2001 Ported by Wayne Boyer
33  *
34  * RESTRICTIONS
35  *	None
36  */
37 
38 #include <sys/types.h>
39 #include <sys/wait.h>
40 #include <stdio.h>
41 #include <errno.h>
42 #include "test.h"
43 
44 char *TCID = "fork11";
45 int TST_TOTAL = 1;
46 
47 static void setup(void);
48 static void cleanup(void);
49 
50 #define NUMFORKS 100
51 
52 int main(int ac, char **av)
53 {
54 	int i, pid, cpid, status;
55 	int fail = 0;
56 	int lc;
57 
58 	tst_parse_opts(ac, av, NULL, NULL);
59 
60 	setup();
61 
62 	for (lc = 0; TEST_LOOPING(lc); lc++) {
63 		tst_count = 0;
64 
65 		for (i = 0; i < NUMFORKS; i++) {
66 			pid = fork();
67 			if (pid == 0)
68 				exit(0);
69 
70 			if (pid > 0) {	/* parent */
71 				cpid = wait(&status);
72 				if (cpid != pid)
73 					fail++;
74 			} else {
75 				fail++;
76 				break;
77 			}
78 		}
79 		if (fail)
80 			tst_resm(TFAIL, "fork failed %d times", fail);
81 		else
82 			tst_resm(TPASS, "fork test passed, %d processes", i);
83 	}
84 
85 	cleanup();
86 	tst_exit();
87 }
88 
89 static void setup(void)
90 {
91 	tst_sig(FORK, DEF_HANDLER, cleanup);
92 	TEST_PAUSE;
93 }
94 
95 static void cleanup(void)
96 {
97 }
98