Program to implement System Call

/*Program to implement System Call*/

#include<stdio.h>

main()

{

int pid;

printf("DATE:(To be printed by child process)\n");

pid=fork();

switch(pid)

{

case -1:printf("FORK FAILED");

exit(1);

case 0:printf("\n CHIELD PROCESS ID IS: %i",getpid());

execl("/bin/date","date",(char*)0);

break;

default:break;

}

wait(10);

printf("\nPARET PROCESS ID: %i \n",getpid());

}

OUTPUT :

guest-vLoOth@computer-OptiPlex-745:~$ cc sc.c

guest-vLoOth@computer-OptiPlex-745:~$ ./a.out

DATE:(To be printed by child process)

Mon Mar 10 14:23:49 IST 2014

PARET PROCESS ID: 2537