testing/lxc: add init.d script from gentoo

2 files changed, 120 insertions, 3 deletions

diff --git a/testing/lxc/APKBUILD b/testing/lxc/APKBUILD
index 95856e1d0..042ae13c0 100644
--- a/testing/lxc/APKBUILD
+++ b/testing/lxc/APKBUILD
@@ -3,7 +3,7 @@
 pkgname=lxc
 pkgver=0.7.4
 _mypkgver=${pkgver/_rc/-rc}
-pkgrel=1
+pkgrel=2
 pkgdesc="linux containers - tools"
 url="http://lxc.sourceforge.net/"
 arch="all"
@@ -13,7 +13,8 @@ depends_dev="libcap-dev"
 makedepends="$depends_dev"
 install=""
 subpackages="$pkgname-dev $pkgname-doc"
-source="http://lxc.sourceforge.net/download/lxc/$pkgname-$_mypkgver.tar.gz"
+source="http://lxc.sourceforge.net/download/lxc/$pkgname-$_mypkgver.tar.gz
+	lxc.initd"
 
 _builddir="${srcdir}/${pkgname}-${_mypkgver}"
 prepare() {
@@ -37,6 +38,8 @@ build() {
 package() {
 	cd "$_builddir"
 	make DESTDIR="$pkgdir" install || return 1
+	install -Dm755 "$srcdir"/lxc.initd "$pkgdir"/etc/init.d/lxc
 }
 
-md5sums="51bb5d7d9d22e2c98490aed47fc02ad9  lxc-0.7.4.tar.gz"
+md5sums="51bb5d7d9d22e2c98490aed47fc02ad9  lxc-0.7.4.tar.gz
+e66c3cf8e70168b07060746a4e65b671  lxc.initd"
diff --git a/testing/lxc/lxc.initd b/testing/lxc/lxc.initd
new file mode 100644
index 000000000..86bae5f75
--- /dev/null
+++ b/testing/lxc/lxc.initd
@@ -0,0 +1,114 @@
+#!/sbin/runscript
+# Copyright 1999-2011 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/app-emulation/lxc/files/lxc.initd,v 1.3 2011/02/26 18:02:51 flameeyes Exp $
+
+CONTAINER=${SVCNAME#*.}
+CONFIGFILE=${CONFIGFILE:-/etc/lxc/${CONTAINER}.conf}
+
+lxc_get_var() {
+    awk 'BEGIN { FS="[ \t]*=[ \t]*" } $1 == "'$1'" { print $2; exit }' ${CONFIGFILE}
+}
+
+cgroup_get_mount() {
+    mount | awk '$5 == "cgroup" { print $3; exit }'
+}
+
+checkconfig() {
+    if [ ${CONTAINER} = ${SVCNAME} ]; then
+	eerror "You have to create an init script for each container:"
+	eerror " ln -s lxc /etc/init.d/lxc.container"
+	return 1
+    fi
+
+    utsname=$(lxc_get_var lxc.utsname)
+    if [ ${CONTAINER} != ${utsname} ]; then
+        eerror "You should use the same name for the service and the"
+        eerror "container. Right now the container is called ${utsname}"
+        return 1
+    fi
+}
+
+depend() {
+	# be quiet, since we have to run depend() also for the
+	# non-muxed init script, unfortunately.
+	checkconfig 2>/dev/null || return 0
+
+	config ${CONFIGFILE}
+	need localmount
+
+        # find out which network interface the container is linked to,
+        # and then require that to be enabled, so that the
+        # dependencies are correct.
+        netif=$(lxc_get_var lxc.network.link)
+        [ -n "${netif}" ] && need net.${netif}
+}
+
+start() {
+    checkconfig || return 1
+
+    # make sure that cgroup is mounted if it isn't already, this
+    # ensures that we can actually proceed!
+    cgroupmount=$(cgroup_get_mount)
+    if [ -z ${cgroupmount} ]; then
+        mkdir -p /cgroup
+
+        if ! mount -t cgroup cgroup /cgroup; then
+            eerror "Unable to mount cgroup pseudo-filesystem on /cgroup"
+            return 1
+        fi
+
+        cgroupmount=/cgroup
+    fi
+
+    rm /var/log/lxc/${CONTAINER}.log
+
+    rootpath=$(lxc_get_var lxc.rootfs)
+
+    # Check the format of our init and the chroot's init, to see if we
+    # have to use linux32 or linux64…
+    case $(scanelf -BF '%M#f' /sbin/init ${rootpath}/sbin/init | tr '\n' ':') in
+	ELFCLASS64:ELFCLASS64:) setarch=;;
+	ELFCLASS32:ELFCLASS32:) setarch=;;
+	ELFCLASS32:ELFCLASS64:) setarch=linux64;;
+	ELFCLASS64:ELFCLASS32:) setarch=linux32;;
+    esac
+
+    ebegin "Starting ${CONTAINER}"
+    ${setarch} lxc-start -l WARN -n ${CONTAINER} -f ${CONFIGFILE} -d -o /var/log/lxc/${CONTAINER}.log
+    sleep 0.5
+
+    # lxc-start -d will _always_ report a correct startup, even if it
+    # failed, so rather than trust that, check that the cgroup exists.
+    [ -d ${cgroupmount}/${CONTAINER} ]
+    eend $?
+}
+
+stop() {
+    checkconfig || return 1
+
+    cgroupmount=$(cgroup_get_mount)
+
+    if ! [ -d ${cgroupmount}/${CONTAINER} ]; then
+        ewarn "${CONTAINER} doesn't seem to be started."
+        return 0
+    fi
+
+    init_pid=$(head -n1 ${cgroupmount}/${CONTAINER}/tasks)
+
+    ebegin "Shutting down system in ${CONTAINER}"
+    kill -INT ${init_pid}
+    eend $?
+
+    sleep 15
+
+    missingprocs=$(pgrep -P ${init_pid})
+
+    if [ -n "${missingprocs}" ]; then
+	ewarn "Something failed to properly shut down in ${CONTAINER}"
+    fi
+
+    ebegin "Stopping ${CONTAINER}"
+    lxc-stop -n ${CONTAINER}
+    eend $?
+}