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Created Feb 25, 2019
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// gcc -Wall -pthread -o vforktest vforktest.c
#include <stdio.h>
#include <pthread.h>
#include <unistd.h>
#include <sys/types.h>
static void* run (void* arg)
for (int i = 0; i < 6; ++i) {
printf ("Test %d\n", i);
sleep (1);
return 0;
int main (int argc, char** argv)
pthread_t tid;
pthread_create (&tid, NULL, &run, NULL);
int pid = vfork ();
sleep (3);
if (pid == 0) {
execlp ("/bin/ls", "ls", (char*)NULL);
sleep (3);
pthread_join (tid, NULL);
return 0;
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