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#include <unistd.h>
main()
{
pid_t ForkPID;
printf("Program start. \n");
ForkPID = fork(); /* Create a child and copy the parents
* parent data space, heap and stack.
*/
/* ForkPID == -1 Fork failure.
* == 0 This is the child process.
* > 0 This is the parent process. The number given is the
* PID of the child.
*/
printf("forkPID is %d \n", ForkPID); /* Child execution starts here. */
printf("Program end. \n");
}
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