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forkwait1d.c
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forkwait1d.c
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#include <stdio.h>
#include <comp421/yalnix.h>
int
main(int argc, char **argv)
{
int pid1, pid2;
int status;
int i;
setbuf(stdout, NULL);
printf("FORKWAIT> This program tests that Wait collects zombie processes\n");
printf("FORKWAIT> If no more FORKWAIT output, Fork does not work\n");
for (i = 0; i < 10; i++) {
if ((pid1 = Fork()) == 0)
{
printf("FORKWAIT %d> CHILD about to exit with 1234567\n", i);
Exit(1234567);
}
printf("FORKWAIT %d> PARENT: child pid = %d, &status = %p\n",
i, pid1, &status);
pid2 = Wait(&status);
printf("FORKWAIT %d> Wait returned pid %d status %d\n",
i, pid2, status);
if ((pid2 != pid1) || (status != 1234567)) {
printf("%d Should have returned pid %d status 1234567!!\n",
i, pid1);
Exit(1);
}
else {
printf("FORKWAIT %d> GOOD!\n", i);
}
}
Exit(0);
}