BusyBox init
BusyBox has a minimal init program that uses an /etc/inittab configuration file to start programs at bootup and stop them at shutdown. The actual work is done by shell scripts, which, by convention, are placed in the /etc/init.d directory.
init begins by reading /etc/inittab. This file contains a list of programs to run, one per line, in this format:
<id>::<action>:<program>
The roles of these parameters are:
id: The controlling terminal for the commandaction: When and how to run the programprogram: The program to run along with all its command-line arguments
The actions are:
sysinit: Runs the program wheninitstarts before any of the other types of actions.respawn: Runs the program and restarts it if it terminates. It is used to run a program as a daemon.askfirst: The same asrespawn, but it prints the message Please press Enter to activate this console to the console and runs...
