June 2017
Intermediate to advanced
478 pages
13h 14m
English
Content preview from Mastering Embedded Linux Programming - Second Edition
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Starting a daemon process
Typically, you would want to run certain background processes at startup. Let's take the log daemon, syslogd, as an example. The purpose of syslogd is to accumulate log messages from other programs, mostly other daemons. Naturally, BusyBox has an applet for that!
Starting the daemon is as simple as adding a line like this to etc/inittab:
::respawn:/sbin/syslogd -n
respawn means that if the program terminates, it will be automatically restarted; -n means that it should run as a foreground process. The log is written to /var/log/messages.
You may also want to start klogd in the same way: klogd sends kernel log messages to syslogd so that they can be logged to permanent storage.
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