NAME
krsd — kernel registry services daemon
SYNOPSIS
krsd
-1
krsd
[-i]
[-d
seconds]
DESCRIPTION
krsd
saves data, flagged as persistent in the core kernel KRS tree, to files on disk.
These files are read when the system is booted, in order to restore the
aforementioned persistent data.
When running in daemon mode,
krsd
sleeps,
waking periodically to check if any persistent data have changed since the
last save.
If persistent data have changed, the new state of the data is saved to disk.
Otherwise,
krsd
sleeps for another period of time and then repeats the process.
When running in
one time
(non-daemon) mode,
krsd
unconditionally saves persistent data to disk and then exits.
Normally,
krsd
is executed in daemon mode by
init(1M).
The
/etc/inittab
entry for
krsd
will cause
krsd
to be respawned automatically if it is terminated.
krsd
uses the
syslog
message logging facility to log all
krsd
activity.
Persistent KRS data are maintained in files based on the
class
of the data in question.
Currently, the following
classes
are recognized:
- system specific
Data that apply to the system in general,
regardless of what configuration is booted.
This data is saved in the file
system.krs.
- configuration specific
Data specific to a given bootable configuration.
This data is saved in the file
config.krs.
krsd
only saves the
system specific
class; the
configuration specific
class is managed by the kernel configuration tools (see
kconfig(5)).
Options
krsd
recognizes the following options:
- -1
One time
mode, unconditionally save persistent data to disk, then exit.
- -i
Run from
inittab,
parent does not spawn a child nor exit.
Required if
respawn
from inittab is to work properly.
- -d seconds
Set the delay time to
seconds
seconds.
This is the time interval between attempted saves of persistent data.
The default interval is 300 seconds.
AUTHOR
krsd
was developed by Hewlett-Packard Company.
Printable version
