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Atari Mega Archive 2
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minix
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up1510b.tgz
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up1510b
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src
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test
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test4.c
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C/C++ Source or Header
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1990-07-23
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/* test 4 */
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
int pid0, pid1, pid2, pid3, s;
int i, fd;
int nextb;
char *tempfile = "test4.temp";
char buf[1024];
main()
{
int k;
creat(tempfile, 0777);
printf("Test 4 ");
fflush(stdout); /* have to flush for child's benefit */
for (k = 0; k < 20; k++) {
subr();
}
printf("ok\n");
unlink(tempfile);
}
subr()
{
if (pid0 = fork()) {
/* Parent 0 */
if (pid0 < 0) nofork();
if (pid1 = fork()) {
/* Parent 1 */
if (pid1 < 0) nofork();
if (pid2 = fork()) {
/* Parent 2 */
if (pid2 < 0) nofork();
if (pid3 = fork()) {
/* Parent 3 */
if (pid3 < 0) nofork();
for (i = 0; i < 10000; i++);
kill(pid2, 9);
kill(pid1, 9);
kill(pid0, 9);
wait(&s);
wait(&s);
wait(&s);
wait(&s);
} else {
fd = open(tempfile, O_RDONLY);
lseek(fd, 20480L * nextb, 0);
for (i = 0; i < 10; i++) read(fd, buf, 1024);
nextb++;
close(fd);
exit(0);
}
} else {
while (1) getpid();
}
} else {
while (1) getpid();
}
} else {
while (1) getpid();
}
}
nofork()
{
printf("Fork failed. Not enough memory.\n");
exit(1);
}