Unix System Calls - wait exit exec

// Unix system calls

// exec, exit, wait

#include<stdio.h>

#include<string.h>

#include<sys/types.h>

#include<unistd.h>

int main(int argc, char *argv[])

{

          pid_t pid;

          int cstatus;            

          pid_t c;                

          pid=fork();

         

          if(pid == -1)

                   printf("\n Error in creating process ");

          else if(pid == 0)

          {

                   printf("\nExecuting in child process");

                   execvp(argv[1], &argv[1]);

                    perror("exec failure");

                   exit(1);

          }

          else

          {

                    printf("\nExecuting in parent process");

                    c = wait(&cstatus); /* Wait for child to complete. */

                   printf("\nParent: Child %ld exited with status = %d\n", (long) c, cstatus);

          }       

}