02-27-2002
You're way off the mark. Asking what a daemon does in like asking what a program does....the answer depends on the specific example.
cron, inetd, syslogd all run as daemons and they do a lot. But it is easy to write a daemon that does nothing but just monitor something. It's also easy to write a daemon that does nothing at all.
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LEARN ABOUT DEBIAN
powerd
powerd(1M) powerd(1M)
NAME
powerd - power manager daemon
SYNOPSIS
/usr/lib/power/powerd [-n]
The powerd daemon is started by pmconfig(1M) to monitor system activity and perform an automatic shutdown using the suspend-resume feature.
When the system is suspended, complete current state is saved on the disk before power is removed. On reboot, the system automatically
starts a resume operation and the system is restored to the same state it was in immediately prior to suspend.
Immediately prior to system shutdown, the daemon notifies syslogd(1M) of the shutdown, which broadcasts a notification.
The following option is supported:
-n No broadcast mode. The daemon silently shuts down the system without notifying syslogd(1M).
/etc/power.conf Power Management configuration information file
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWpmu |
+-----------------------------+-----------------------------+
|Interface Stability |Unstable |
+-----------------------------+-----------------------------+
pmconfig(1M), dtpower(1M), syslogd(1M), power.conf(4), attributes(5), cpr(7), pm(7D)
Using Power Management
15 Oct 1999 powerd(1M)