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#!/bin/sh
# Copyright (C) 2017 Dmitry Bogatov <KAction@gnu.org>
# Author: Dmitry Bogatov <KAction@gnu.org>
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 3
# of the License, or (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
set -e
# rescan and invoke-rc.d actions are done only if runit is init
is_runit () {
[ -f /run/runit.stopit ]
}
is_installed () {
[ -f /sbin/runit ]
}
# No-Op if the service is not enabled
# sv can't send signals to a disabled service
is_enabled () {
[ -h /etc/service/"$NAME" ]
}
sv_warn () {
echo "warning: sv: failed to signal $NAME"
true
}
# workaround for races as in #919296
ok_pipe () {
[ -p "/etc/sv/$NAME/supervise/ok" ]
}
postinst () {
local action="${1}" previous="${2:-}"
if [ -x /usr/sbin/policy-rc.d ]; then
set +e ; /usr/sbin/policy-rc.d "${NAME}" start ; rc=$? ; set -e
if [ "$rc" = "101" ]; then
echo "runit: ${NAME}: start action denied by policy-rc.d" && return 0
fi
fi
# create supervise links at runtime, only if runit is installed
mkdir -p /run/runit/supervise
if [ -e /lib/runit/make_svlinks ]; then
/lib/runit/make_svlinks "$NAME"
fi
# It is important to not override local admin
# decision (see #899242 and 942323 ).
if [ "${ENABLE}" = yes ]; then
if [ ! -h "/etc/runit/runsvdir/default/.$NAME" ] && \
[ ! -h "/etc/runit/runsvdir/default/$NAME" ]; then
# $NAME link tested to avoid infinte loop of symlinks
ln -sf "/etc/sv/$NAME" "/etc/runit/runsvdir/default/$NAME"
if is_runit && pidof runsvdir > /dev/null ; then
# always force a rescan after enable
kill -s ALRM 1
fi
fi
# ENABLE=no is always a no-op
fi
#invoke-rc.d
if is_runit && is_enabled ; then
if [ "${action}" = 'configure' ] || [ "${action}" = 'abort-upgrade' ] || \
[ "${action}" = 'abort-deconfigure' ] || [ "${action}" = 'abort-remove' ] ; then
if [ "${ONUPGRADE}" = restart ] && [ -n "${previous}" ] && ok_pipe ; then
sv restart ${NAME} || sv_warn
elif [ "${ONUPGRADE}" = reload ] && [ -n "${previous}" ] && ok_pipe ; then
sv reload ${NAME} || sv_warn
elif ok_pipe ; then
# ONUPGRADE=stop || ONUPGRADE=nostop
# ONUPGRADE= restart || reload and [ ! -n "${previous}" ]
sv start ${NAME} || sv_warn
else
return 0
fi
fi
fi
}
prerm () {
local action="${1}"
# invoke-rc.d
if is_runit && is_enabled ; then
if [ -x /usr/sbin/policy-rc.d ]; then
set +e ; /usr/sbin/policy-rc.d "${NAME}" stop ; rc=$? ; set -e
if [ "$rc" = "101" ]; then
echo "runit: ${NAME}: stop action denied by policy-rc.d" && return 0
fi
fi
if [ "${ONUPGRADE}" = stop ] && ok_pipe ; then
sv stop ${NAME} || sv_warn
elif [ "${action}" = 'remove' ] && ok_pipe ; then
# ONUPGRADE=restart || ONUPGRADE=nostop
sv stop ${NAME} || sv_warn
else
return 0
fi
fi
}
postrm () {
local action="${1}"
if [ "${action}" != 'purge' ] && [ "${action}" != 'remove' ] ; then
return
fi
# When "ENABLE=no" the $NAME link is an admin decision
# so we don't remove it.
# Links in other runsvdirs is responsibility of administrator.
if [ "${action}" = 'remove' ] && [ "${ENABLE}" = yes ] ; then
rm -f "/etc/runit/runsvdir/default/$NAME"
fi
if [ "${action}" = 'purge' ] ; then
rm -f "/etc/runit/runsvdir/default/$NAME"
rm -f "/etc/runit/runsvdir/default/.$NAME"
#TODO: make sure runsv exit before we remove supervise files, printf x on supervise
fi
# If runscript was never invoked, there will be no files
# in this directory, and `dpkg' will remove it. In this case,
# we have nothing to do.
for supervise in "/etc/sv/$NAME/supervise" \
"/etc/sv/$NAME/log/supervise"; do
if [ -d "$supervise" ] ; then
#TODO test/loop that runsv is gone before remove supervise files
# Actually only `down' may be absent, but it does not
# matter.
for file in control lock ok pid stat status down ; do
rm -f "$supervise/$file"
done
# It should be empty now. If it is not, it means that
# system administrator put something there. It is very
# stupid, but will of user is sacred, and directory is
# left as-is in such case.
#
# NOTE: Non-POSIX option is used. The day coreutils will
# no longer be essential, it will require a fix.
if [ -h "$supervise" ]; then
rm "$supervise"
else
rmdir --ignore-fail-on-non-empty "$supervise"
fi
fi
done
if [ "${action}" = 'purge' ] ; then
#rm -f "/etc/runit/runsvdir/default/$NAME"
#rm -f "/etc/runit/runsvdir/default/.$NAME"
readonly logdir="/var/log/runit/${NAME}"
if [ -d "${logdir}" ] ; then
rm -r "${logdir}"
fi
fi
}
#called as NAME='servicename' PKG='pkgname' /usr/lib/runit-helper/runit-helper sv_purge
sv_purge () {
[ -z "$PKG" ] && echo "$PKG empty" && return 0
[ -z "$NAME" ] && echo "$NAME empty" && return 0
if echo "$NAME" | grep -E '.*/$' >/dev/null ; then
echo "warning: $NAME : not allowed, ends with /"
return 0 #ends with / , dangerous with rm -rf
fi
servicesdir=/usr/share/runit/sv.now
#if it's enabled, make sure runsv exits before the dir is removed
if [ -h /etc/runit/runsvdir/default/$NAME ]; then
if [ -r /etc/runit/runsvdir/default/$NAME/supervise/stat ]; then
svstatus="$(cat /etc/runit/runsvdir/default/$NAME/supervise/stat)"
fi
case "$svstatus" in
run|down|'run, want down' ) #maybe also 'down, want up' and 'finish'
touch "/etc/runit/runsvdir/default/$NAME/down" || true
printf x > "/etc/runit/runsvdir/default/$NAME/supervise/control" && \
unlink "/etc/runit/runsvdir/default/$NAME"
;;
*)
unlink "/etc/runit/runsvdir/default/$NAME"
;;
esac
fi
if [ -r "$servicesdir/$NAME/.meta/pkg" ]; then
thispkg="$(cat $servicesdir/$NAME/.meta/pkg)"
if [ "$thispkg" = "$PKG" ]; then
#TODO: also clean supervise in /run ?
rm -r "$servicesdir/$NAME"
logdir="/var/log/runit/${NAME}"
if [ -d "${logdir}" ] ; then
rm -r "${logdir}"
fi
fi
else
#give up if not from this package
#should not happen in /usr/share/runit/sv.now/ but still..
return 0
fi
}
"$@"
# vim: sw=4:et
|
