X-Git-Url: http://pere.pagekite.me/gitweb/homepage.git/blobdiff_plain/658fdd927467ec99076ce43bea4607661f97b987..a5b0a729d91a8bda65c433de13e96179cc11a69c:/blog/index.rss diff --git a/blog/index.rss b/blog/index.rss index 0fa8b44add..453efc0fca 100644 --- a/blog/index.rss +++ b/blog/index.rss @@ -6,6 +6,205 @@ http://people.skolelinux.org/pere/blog/ + + Debian init.d boot script example for rsyslog + http://people.skolelinux.org/pere/blog/Debian_init_d_boot_script_example_for_rsyslog.html + http://people.skolelinux.org/pere/blog/Debian_init_d_boot_script_example_for_rsyslog.html + Sat, 2 Nov 2013 22:40:00 +0100 + <p>If one of the points of switching to a new init system in Debian is +<a href="http://thomas.goirand.fr/blog/?p=147">to get rid of huge +init.d scripts</a>, I doubt we need to switch away from sysvinit and +init.d scripts at all. Here is an example init.d script, ie a rewrite +of /etc/init.d/rsyslog:</p> + +<p><pre> +#!/lib/init/init-d-script +### BEGIN INIT INFO +# Provides: rsyslog +# Required-Start: $remote_fs $time +# Required-Stop: umountnfs $time +# X-Stop-After: sendsigs +# Default-Start: 2 3 4 5 +# Default-Stop: 0 1 6 +# Short-Description: enhanced syslogd +# Description: Rsyslog is an enhanced multi-threaded syslogd. +# It is quite compatible to stock sysklogd and can be +# used as a drop-in replacement. +### END INIT INFO +DESC="enhanced syslogd" +DAEMON=/usr/sbin/rsyslogd +</pre></p> + +<p>Pretty minimalistic to me... For the record, the original sysv-rc +script was 137 lines, and the above is just 15 lines, most of the meta +info/comments.</p> + +<p>How to do this, you ask? Well, one create a new script +/lib/init/init-d-script looking something like this: + +<p><pre> +#!/bin/sh + +# Define LSB log_* functions. +# Depend on lsb-base (>= 3.2-14) to ensure that this file is present +# and status_of_proc is working. +. /lib/lsb/init-functions + +# +# Function that starts the daemon/service + +# +do_start() +{ + # Return + # 0 if daemon has been started + # 1 if daemon was already running + # 2 if daemon could not be started + start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \ + || return 1 + start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -- \ + $DAEMON_ARGS \ + || return 2 + # Add code here, if necessary, that waits for the process to be ready + # to handle requests from services started subsequently which depend + # on this one. As a last resort, sleep for some time. +} + +# +# Function that stops the daemon/service +# +do_stop() +{ + # Return + # 0 if daemon has been stopped + # 1 if daemon was already stopped + # 2 if daemon could not be stopped + # other if a failure occurred + start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name $NAME + RETVAL="$?" + [ "$RETVAL" = 2 ] && return 2 + # Wait for children to finish too if this is a daemon that forks + # and if the daemon is only ever run from this initscript. + # If the above conditions are not satisfied then add some other code + # that waits for the process to drop all resources that could be + # needed by services started subsequently. A last resort is to + # sleep for some time. + start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --exec $DAEMON + [ "$?" = 2 ] && return 2 + # Many daemons don't delete their pidfiles when they exit. + rm -f $PIDFILE + return "$RETVAL" +} + +# +# Function that sends a SIGHUP to the daemon/service +# +do_reload() { + # + # If the daemon can reload its configuration without + # restarting (for example, when it is sent a SIGHUP), + # then implement that here. + # + start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME + return 0 +} + +SCRIPTNAME=$1 +scriptbasename="$(basename $1)" +echo "SN: $scriptbasename" +if [ "$scriptbasename" != "init-d-library" ] ; then + script="$1" + shift + . $script +else + exit 0 +fi + +NAME=$(basename $DAEMON) +PIDFILE=/var/run/$NAME.pid + +# Exit if the package is not installed +#[ -x "$DAEMON" ] || exit 0 + +# Read configuration variable file if it is present +[ -r /etc/default/$NAME ] && . /etc/default/$NAME + +# Load the VERBOSE setting and other rcS variables +. /lib/init/vars.sh + +case "$1" in + start) + [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME" + do_start + case "$?" in + 0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;; + 2) [ "$VERBOSE" != no ] && log_end_msg 1 ;; + esac + ;; + stop) + [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME" + do_stop + case "$?" in + 0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;; + 2) [ "$VERBOSE" != no ] && log_end_msg 1 ;; + esac + ;; + status) + status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $? + ;; + #reload|force-reload) + # + # If do_reload() is not implemented then leave this commented out + # and leave 'force-reload' as an alias for 'restart'. + # + #log_daemon_msg "Reloading $DESC" "$NAME" + #do_reload + #log_end_msg $? + #;; + restart|force-reload) + # + # If the "reload" option is implemented then remove the + # 'force-reload' alias + # + log_daemon_msg "Restarting $DESC" "$NAME" + do_stop + case "$?" in + 0|1) + do_start + case "$?" in + 0) log_end_msg 0 ;; + 1) log_end_msg 1 ;; # Old process is still running + *) log_end_msg 1 ;; # Failed to start + esac + ;; + *) + # Failed to stop + log_end_msg 1 + ;; + esac + ;; + *) + echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2 + exit 3 + ;; +esac + +: +</pre></p> + +<p>It is based on /etc/init.d/skeleton, and could be improved quite a +lot. I did not really polish the approach, so it might not always +work out of the box, but you get the idea. I did not try very hard to +optimize it nor make it more robust either.</p> + +<p>A better argument for switching init system in Debian than reducing +the size of init scripts (which is a good thing to do anyway), is to +get boot system that is able to handle the kernel events sensibly and +robustly, and do not depend on the boot to run sequentially. The boot +and the kernel have not behaved sequentially in year.</p> + + + Browser plugin for SPICE (spice-xpi) uploaded to Debian http://people.skolelinux.org/pere/blog/Browser_plugin_for_SPICE__spice_xpi__uploaded_to_Debian.html @@ -514,72 +713,5 @@ lvresize + resize2fs in tty 2 while installing).</p> - - Videos about the Freedombox project - for inspiration and learning - http://people.skolelinux.org/pere/blog/Videos_about_the_Freedombox_project___for_inspiration_and_learning.html - http://people.skolelinux.org/pere/blog/Videos_about_the_Freedombox_project___for_inspiration_and_learning.html - Fri, 27 Sep 2013 14:10:00 +0200 - <p>The <a href="http://www.freedomboxfoundation.org/">Freedombox -project</a> have been going on for a while, and have presented the -vision, ideas and solution several places. Here is a little -collection of videos of talks and presentation of the project.</p> - -<ul> - -<li><a href="http://www.youtube.com/watch?v=ukvUz5taxvA">FreedomBox - -2,5 minute marketing film</a> (Youtube)</li> - -<li><a href="http://www.youtube.com/watch?v=SzW25QTVWsE">Eben Moglen -discusses the Freedombox on CBS news 2011</a> (Youtube)</li> - -<li><a href="http://www.youtube.com/watch?v=Ae8SZbxfE0g">Eben Moglen - -Freedom in the Cloud - Software Freedom, Privacy and and Security for -Web 2.0 and Cloud computing at ISOC-NY Public Meeting 2010</a> -(Youtube)</li> - -<li><a href="http://www.youtube.com/watch?v=vNaIji_3xBE">Fosdem 2011 -Keynote by Eben Moglen presenting the Freedombox</a> (Youtube)</li> - -<li><a href="http://www.youtube.com/watch?v=9bDDUyJSQ9s">Presentation of -the Freedombox by James Vasile at Elevate in Gratz 2011</a> (Youtube)</li> - -<li><a href="http://www.youtube.com/watch?v=zQTmnk27g9s"> Freedombox - -Discovery, Identity, and Trust by Nick Daly at Freedombox Hackfest New -York City in 2012</a> (Youtube)</li> - -<li><a href="http://www.youtube.com/watch?v=tkbSB4Ba7Ck">Introduction -to the Freedombox at Freedombox Hackfest New York City in 2012</a> -(Youtube)</li> - -<li><a href="http://www.youtube.com/watch?v=z-P2Jaeg0aQ">Freedom, Out -of the Box! by Bdale Garbee at linux.conf.au Ballarat, 2012</a> (Youtube) </li> - -<li><a href="https://archive.fosdem.org/2013/schedule/event/freedombox/">Freedombox -1.0 by Eben Moglen and Bdale Garbee at Fosdem 2013</a> (FOSDEM) </li> - -<li><a href="http://www.youtube.com/watch?v=e1LpYX2zVYg">What is the -FreedomBox today by Bdale Garbee at Debconf13 in Vaumarcus -2013</a> (Youtube)</li> - -</ul> - -<p>A larger list is available from -<a href="https://wiki.debian.org/FreedomBox/TalksAndPresentations">the -Freedombox Wiki</a>.</p> - -<p>On other news, I am happy to report that Freedombox based on Debian -Jessie is coming along quite well, and soon both Owncloud and using -Tor should be available for testers of the Freedombox solution. :) In -a few weeks I hope everything needed to test it is included in Debian. -The withsqlite package is already in Debian, and the plinth package is -pending in NEW. The third and vital part of that puzzle is the -metapackage/setup framework, which is still pending an upload. Join -us on <a href="irc://irc.debian.org:6667/%23freedombox">IRC -(#freedombox on irc.debian.org)</a> and -<a href="http://lists.alioth.debian.org/mailman/listinfo/freedombox-discuss">the -mailing list</a> if you want to help make this vision come true.</p> - - -