.TH ninit-sysvinit 8 "Dec 28, 2009"
.SH NAME
ninit-sysvinit \- SysVinit emulator listening on /dev/initctl
.SH SYNOPSIS
.B ninit-sysvinit
.br
.B ninit-sysvinit
powerS

.SH DESCRIPTION
.B ninit
does not use the
.I /dev/initctl
fifo.  As a result the SysVinit commands
telinit, reboot, halt, shutdown do not work.
Some of them need to write to 
.I /dev/initctl
to work properly.

.B ninit-sysvinit
is a SysVinit emulator which listens on
.I /dev/initctl
and starts some services if there is any activity on the fifo.

.SH USAGE
Five seconds after starting all services
.B ninit
tries to start the sysvinit service.
If the last service exists then 
.B ninit
opens and listens on
.I /dev/initctl. 
.B  Never include 
the service sysvinit in 
.I /etc/ninit/default
nor start it at boot time.

.SH OPTIONS
.B ninit\-sysvinit
reads the control file
.I sysvinit\-timeout
in the service directory.
It must contain two numbers n1:n2.
If there is not
any activity  on 
.I /dev/initctrl  
for more than n1 seconds
the program exits.
If the number n1 is zero
.B ninit\-sysvinit
wait forever.

If needed, 
.B ninit
can start
.B ninit\-sysvinit
later again.

.SH RUNLEVELS
SysVinit has runlevels 0123456S.  The command
.br
.B telinit S
.br
writes the request to
.I /dev/initctl
and 
.B ninit\-sysvinit
starts the service 
.I levelS.
It works similarly with telinit 5, telinit Q or telinit U.
Then
.B ninit\-sysvinit
starts the 
.I level5,
.I levelQ 
or 
.I levelU 
service if it exists.

.SH "POWER ACTIONS"
.B ninit\-sysvinit
also starts the services
.I powerF,
.I powerO 
or
.I powerL.
The letters come from F(AIL), O(K) or L(OW).  
The program can obtain the power request from
.I /dev/initctl
or from a SIGPWR signal and the file
.I /etc/powerstatus.
See the manual page init(8) for more info.

.SH SIGNALS
Don't send signal SIGPWR to
.B ninit\-sysvinit.
Manpage init(8) says:


Usage of SIGPWR and 
.I /etc/powerstatus 
is discouraged. Someone wanting to
interact  with  init  should use the 
.I /dev/initctl 
control channel.

If some program still needs to use signal SIGPWR
it must send it dirrectly to
.B ninit.

.SH ENVIRON
SysVinit 
.B shutdown
sets the variable 
INIT_HALT=POWERDOWN 
or
INIT_HALT=HALT 
depending on the options
\-r \-h \-H \-P.  You can (re)set this variable
using:

.B nsvc -E INIT_HALT
.br
.B nsvc -E INIT_HALT=POWERDOWN

.SH "AUTHOR"
If you don't plan to use SysvInit's shutdown, reboot,
halt or telninit commands, you can do:

.B cd /etc/ninit
.br
.B mv sysvinit sysvinit_
.br
.B ninit\-reload \-v \-u /sbin/ninit

Why did I write this SysVinit 
.B emulator?  
This is a good question.
Ninit has the ninit-shutdown, nkillall and ninit-reboot programs.  There
is no need to use SysVinit halt, reboot... to stop the box clean.
See the code of the emulator.  Maybe you will find the answer there.

Nikola Vladov

.SH FILES
.I /dev/initctl
.br
.I /etc/powerstatus
.br
.I NINIT_HOME/sysvinit/sysvinit\-timeout

.SH SEE ALSO
nsvc(8), ninit-shutdown(8), ninit-runlevel(8)
.br
init(8), shutdown(8), halt(8), reboot(8), telinit(8)