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Embedded Linux for Developers
book

Embedded Linux for Developers

by Alexandru Vaduva, Alex González, Chris Simmonds
September 2016
Intermediate to advanced
989 pages
24h 10m
English
Packt Publishing
Content preview from Embedded Linux for Developers

BusyBox init

BusyBox has a minimal init program that uses a configuration file, /etc/inittab, to define rules to start programs at boot up and to stop them at shutdown. Usually, the actual work is done by shell scripts which, by convention, are placed in the /etc/init.d directory.

init begins by reading the configuration file, /etc/inittab. This contains a list of programs to run, one per line, with this format:

<id>::<action>:<program>

The role of these parameters is as follows:

  • id: The controlling terminal for the command
  • action: The conditions to run this command, as shown in the following paragraph
  • program: The program to run

The actions are as follows:

  • sysinit: Run the program when init starts, before any of the other types of actions.
  • respawn: Run ...
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Publisher Resources

ISBN: 9781787124202