Re: [Xenomai-core] System-V initialization script

[Philippe Gerum <rpm@xenomai.org>]

Romain Lenglet wrote:
> Hi,
> 
> Here is a patch that adds a System-V init script to the 
> distribution. This script creates/deletes the devices in /dev 
> and sets the latency through /proc/xenomai/latency.
> Please re-run automake before committing (if committing).
> 

Ok, queued for 2.1.1. Thanks.

> Is there anything more it should do? For instance, is there a way 
> to start the timer through one of the /proc/xenomai/* 
> pseudo-files?
> 

v2.1 starts the timer as part of the nucleus startup procedure, so it should not 
be needed to do so on boot. This said, providing a write side to 
/proc/xenomai/timer so that we could change the setup on-the-fly looks like a good 
idea.

> 
> 
> ------------------------------------------------------------------------
> 
> --- xenomai/ChangeLog	2006-03-06 12:51:03.624869000 +0900
> +++ xenomai-new/ChangeLog	2006-03-06 17:03:52.806802824 +0900
> @@ -1,3 +1,9 @@
> +2006-03-06  Romain Lenglet <rlenglet@domain.hid>
> +
> +	* scripts/etc/init.d/xenomai, scripts/etc/default/xenomai,
> +	scripts/etc/README scripts/Makefile.am: Add a System-V-like init script
> +	for creating devices and setting the scheduling latency at boot time.
> +
>  2006-03-05  Philippe Gerum  <rpm@xenomai.org>
>  
>  	* ksrc/skins/vxworks/taskLib.c (taskPrioritySet): Return ERROR
> --- xenomai/scripts/Makefile.am	2006-02-27 09:51:18.379979776 +0900
> +++ xenomai-new/scripts/Makefile.am	2006-03-06 17:03:27.412663320 +0900
> @@ -8,4 +8,5 @@
>  
>  EXTRA_DIST = bootstrap prepare-kernel.sh xeno-info \
>  	Kconfig.frag Modules.frag defconfig.frag \
> +	etc/init.d/xenomai etc/default/xenomai etc/README \
>  	$(wildcard postinstall.sh)
> diff -Naurd xenomai/scripts/etc/default/xenomai xenomai-new/scripts/etc/default/xenomai
> --- xenomai/scripts/etc/default/xenomai	1970-01-01 09:00:00.000000000 +0900
> +++ xenomai-new/scripts/etc/default/xenomai	2006-03-06 16:40:30.264021736 +0900
> @@ -0,0 +1,6 @@
> +# The group that owns the Xenomai devices in /dev/.
> +GROUP=root
> +# The access mode to the Xenomai devices in /dev/.
> +MODE=0770
> +# The real-time scheduling latency.
> +LATENCY=0
> diff -Naurd xenomai/scripts/etc/init.d/xenomai xenomai-new/scripts/etc/init.d/xenomai
> --- xenomai/scripts/etc/init.d/xenomai	1970-01-01 09:00:00.000000000 +0900
> +++ xenomai-new/scripts/etc/init.d/xenomai	2006-03-06 17:12:24.006088720 +0900
> @@ -0,0 +1,98 @@
> +#! /bin/sh
> +#
> +# xenomai	Xenomai Real-time framework for Linux.
> +#		This script sets up devices in /dev if Udev is not running,
> +#		and sets the real-time scheduling latency.
> +#
> +#		Written by Romain Lenglet <rlenglet@domain.hid>.
> +#
> +
> +PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
> +NAME=xenomai
> +DESC=Xenomai
> +
> +# Include xenomai defaults if available
> +if [ -f /etc/default/xenomai ] ; then
> +	. /etc/default/xenomai
> +fi
> +
> +# Set default values in case /etc/default/xenomai does not exist or is not
> +# correctly specified
> +GROUP=${GROUP:=root}
> +MODE=${MODE:=0770}
> +LATENCY=${LATENCY:=0}
> +
> +set -e
> +
> +case "$1" in
> +  start|reload|restart|force-reload)
> +	echo -n "Starting $DESC: "
> +
> +	# Create devices if Udev is not running (otherwise, Udev should have
> +	# been configured to create the devices itself).
> +	UDEV_STARTED="N"
> +	if [ -e /dev/.udev ]; then
> +	    if mountpoint -q /dev/; then
> +		UDEV_STARTED="Y"
> +	    fi
> +	fi
> +	if [ "$UDEV_STARTED" = "N" ]; then
> +	    for N in `seq 0 31`; do
> +		F="/dev/rtp$n"
> +		if [ ! -c "$F" ]; then
> +		    /bin/mknod -m 666 "$F" c 150 "$N"
> +		    /bin/chown ":$GROUP" "$F"
> +		    /bin/chmod "$MODE" "$F"
> +		fi
> +	    done
> +	    F=/dev/rtheap
> +	    if [ ! -c "$F" ]; then
> +		/bin/mknod -m 666 "$F" c 10 254
> +		/bin/chown ":$GROUP" "$F"
> +		/bin/chmod "$MODE" "$F"
> +	    fi
> +	    echo -n "devices, "
> +	fi
> +
> +	# Set the scheduling latency.
> +	if [ -w /proc/xenomai/latency ]; then
> +	    echo "$LATENCY" > /proc/xenomai/latency
> +	    echo -n "latency, "
> +	fi
> +
> +	echo "done."
> +	;;
> +  stop)
> +	echo -n "Stopping $DESC: "
> +
> +	# Delete devices if Udev is not running.
> +	UDEV_STARTED="N"
> +	if [ -e /dev/.udev ]; then
> +	    if mountpoint -q /dev/; then
> +		UDEV_STARTED="Y"
> +	    fi
> +	fi
> +	if [ "$UDEV_STARTED" = "N" ]; then
> +	    for N in `seq 0 31`; do
> +		F="/dev/rtp$n"
> +		if [ -c "$F" ]; then
> +		    rm -f "$F"
> +		fi
> +	    done
> +	    F=/dev/rtheap
> +	    if [ -c "$F" ]; then
> +		rm -f "$F"
> +	    fi
> +	    echo -n "devices, "
> +	fi
> +
> +	echo "done."
> +	;;
> +  *)
> +	N=/etc/init.d/$NAME
> +	echo "Usage: $N {start|stop|reload|restart|force-reload}" >&2
> +	exit 1
> +	;;
> +esac
> +
> +exit 0
> diff -Naurd xenomai/scripts/etc/README xenomai-new/scripts/etc/README
> --- xenomai/scripts/etc/README	1970-01-01 09:00:00.000000000 +0900
> +++ xenomai-new/scripts/etc/README	2006-03-06 16:58:37.002812328 +0900
> @@ -0,0 +1,22 @@
> +This directory contains a System-V-style initialization script for Xenomai.
> +That script creates the real-time devices in /dev/, and sets the scheduling
> +latency through the /proc/xenomai/latency interface.
> +
> +To install this script, as root:
> +> cp init.d/xenomai /etc/init.d/xenomai
> +> chown root:root /etc/init.d/xenomai
> +> chmod 0755 /etc/init.d/xenomai
> +
> +The configuration values are stored in the /etc/default/xenomai file.
> +A skeleton is provided in this directory. To install it:
> +> cp default/xenomai /etc/default/xenomai
> +> chown root:root /etc/default/xenomai
> +> chmod 0644 /etc/default/xenomai
> +And adapt the values in /etc/default/xenomai.
> +
> +Then, make the initialization script start in the required runlevels.
> +On Debian, you can use update-rc.d(8) or rcconf(8) to do so.
> +Or you can also do it manually:
> +> for L in 0 1 6; do (cd /etc/rc${L}.d ; ln -s ../init.d/xenomai K20xenomai) ; done
> +> for L in 2 3 4 5; do (cd /etc/rc${L}.d ; ln -s ../init.d/xenomai S20xenomai) ; done
> +
> 
> 
> ------------------------------------------------------------------------
> 
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-- 

Philippe.