How csh runs (cont.)

duplicate:

fork()

parent process running shell,

PID 34, waiting for child

child process running shell, PID 35

parent process running shell,

PID 34, awakens

wait for child:

wait()

process running shell,

PID 34

child process running utility, PID 35

child process terminates PID 35

terminate:

exit()

signal

differentiate:

exec()