xxxxxxxxxx
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h> /* for fork */
#include <sys/types.h> /* for pid_t */
#include <sys/wait.h> /* for wait */
int main()
{
/*Spawn a child to run the program.*/
pid_t pid=fork();
if (pid==0) { /* child process */
static char *argv[]={"ls","-l","Makefile",NULL};
execv("/bin/ls",argv);
exit(127); /* only if execv fails */
}
else { /* pid!=0; parent process */
waitpid(pid,0,0); /* wait for child to exit */
}
return 0;
}