<Dd> e--An array of pointers to environment variables is explicitly passed to the new process image . </Dd> <Dd> l--Command - line arguments are passed individually (a list) to the function . </Dd> <Dd> p--Uses the PATH environment variable to find the file named in the file argument to be executed . </Dd> <Dd> v--Command - line arguments are passed to the function as an array (vector) of pointers . </Dd>

What does it mean for exec to return