[poky] V3 [PATCH 4/4] Add a skeleton for init scripts
Robert Yang
liezhi.yang at windriver.com
Mon May 16 19:40:04 PDT 2011
Add a skeleton for init scripts, the original structure is from
/etc/init.d/skeleton of Ubuntu 10.10, it is in sysvinit_2.87dsf, so add
the COPYRIGHT(GPLv2) of sysvinit_2.87dsf. Modified the original skeleton
a lot to make it as easy as possible, just use posix shell command, and
have tested it with core-image-minimal.
* The skeleton implements the following actions:
- start, stop, restart, status, try-restart and force-reload.
# force-reload is a alias of try-restart.
- not implements reload, since only a few programs have it, just leave
it as placeholder.
* Add /usr/sbin/skeleton-test to test /etc/init.d/skeleton
* The /etc/init.d/skeleton can be run and output the example messages:
1) #./skeleton start (test start)
Starting skeleton ...
2) #./skeleton start (test start again when running)
skeleton already running (1078).
3) #./skeleton status (test status when running)
skeleton is running (1078).
4) #./skeleton stop (test stop)
Stopped skeleton (1078).
5) #./skeleton stop (test stop again)
skeleton is not running; none killed.
6) #./skeleton status (test status when stopped)
skeleton is not running.
7) #./skeleton restart (test restart when running)
Stopped skeleton (1128).
Starting skeleton ...
8) #./skeleton restart (test restart when stopped)
skeleton is not running; none killed.
Starting skeleton ...
9) try-restart (or force-reload) means restart the service if the
service is already running
#./skeleton try-restart (test try-restart when stopped)
skeleton is not running; none killed.
#./skeleton try-restart (test try-restart when running)
Stopped skeleton (1181).
Starting skeleton ...
* Have used syslogd to test it in a real world(with both
core-image-minimal and core-image-sato)
Signed-off-by: Robert Yang <liezhi.yang at windriver.com>
---
.../recipes-skeleton/service/service/COPYRIGHT | 15 ++
.../recipes-skeleton/service/service/skeleton | 193 ++++++++++++++++++++
.../service/service/skeleton_test.c | 11 +
.../recipes-skeleton/service/service_0.1.bb | 32 ++++
4 files changed, 251 insertions(+), 0 deletions(-)
create mode 100644 meta-skeleton/recipes-skeleton/service/service/COPYRIGHT
create mode 100644 meta-skeleton/recipes-skeleton/service/service/skeleton
create mode 100644 meta-skeleton/recipes-skeleton/service/service/skeleton_test.c
create mode 100644 meta-skeleton/recipes-skeleton/service/service_0.1.bb
diff --git a/meta-skeleton/recipes-skeleton/service/service/COPYRIGHT b/meta-skeleton/recipes-skeleton/service/service/COPYRIGHT
new file mode 100644
index 0000000..ec3e171
--- /dev/null
+++ b/meta-skeleton/recipes-skeleton/service/service/COPYRIGHT
@@ -0,0 +1,15 @@
+Sysvinit is Copyright (C) 1991-2004 Miquel van Smoorenburg
+
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
diff --git a/meta-skeleton/recipes-skeleton/service/service/skeleton b/meta-skeleton/recipes-skeleton/service/service/skeleton
new file mode 100644
index 0000000..a3edc9d
--- /dev/null
+++ b/meta-skeleton/recipes-skeleton/service/service/skeleton
@@ -0,0 +1,193 @@
+#! /bin/sh
+### BEGIN INIT INFO
+# Provides: skeleton
+# Required-Start: $local_fs
+# Should-Start:
+# Required-Stop: $local_fs
+# Should-Stop:
+# Default-Start: 2 3 4 5
+# Default-Stop: 0 1 6
+# Short-Description: Example initscript
+# Description: This file should be used to construct scripts to be
+# placed in /etc/init.d
+### END INIT INFO
+
+# The definition of actions: (From LSB 3.1.0)
+# start start the service
+# stop stop the service
+# restart stop and restart the service if the service is already running,
+# otherwise start the service
+# try-restart restart the service if the service is already running
+# reload cause the configuration of the service to be reloaded without
+# actually stopping and restarting the service
+# force-reload cause the configuration to be reloaded if the service supports
+# this, otherwise restart the service if it is running
+# status print the current status of the service
+
+# The start, stop, restart, force-reload, and status actions shall be supported
+# by all init scripts; the reload and the try-restart actions are optional
+
+# Common steps to convert this skeleton into a real init script
+# 1) cp skeleton <the_real_name>
+# 2) Set DESC and NAME
+# 3) Check whether the daemon app is /usr/sbin/$NAME, if not, set it.
+# 4) Set DAEMON_ARGS if there is any
+# 5) Remove the useless code
+
+# NOTE: The skeleton doesn't support the daemon which is a script unless the
+# pidof supports "-x" option, please see more comments for pidofproc ()
+# in /etc/init.d/functions
+
+# PATH should only include /usr/* if it runs after the mountnfs.sh script
+PATH=/sbin:/usr/sbin:/bin:/usr/bin
+
+DESC="skeleton"
+NAME="skeleton-test"
+DAEMON=/usr/sbin/$NAME
+DAEMON_ARGS=""
+PIDFILE=/var/run/$NAME.pid
+
+. /etc/init.d/functions || exit 1
+
+# 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
+
+#
+# Function that starts the daemon/service
+#
+do_start() {
+ local status pid
+
+ status=0
+ pid=`pidofproc $NAME` || status=$?
+ case $status in
+ 0)
+ echo "$DESC already running ($pid)."
+ exit 1
+ ;;
+ *)
+ echo "Starting $DESC ..."
+ exec $DAEMON $DAEMON_ARGS >/dev/null 2>&1 || status=$?
+ echo "ERROR: Failed to start $DESC."
+ exit $status
+ ;;
+ esac
+
+ # 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() {
+ local pid status
+
+ status=0
+ pid=`pidofproc $NAME` || status=$?
+ case $status in
+ 0)
+ # Exit when fail to stop, the kill would complain when fail
+ kill -s 15 $pid >/dev/null && rm -f $PIDFILE && \
+ echo "Stopped $DESC ($pid)." || exit $?
+ ;;
+ *)
+ echo "$DESC is not running; none killed." >&2
+ ;;
+ esac
+
+ # 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.
+ return $status
+}
+
+#
+# Function that sends a SIGHUP to the daemon/service
+#
+do_reload() {
+ local pid status
+
+ status=0
+ # If the daemon can reload its configuration without
+ # restarting (for example, when it is sent a SIGHUP),
+ # then implement that here.
+ pid=`pidofproc $NAME` || status=$?
+ case $status in
+ 0)
+ echo "Reloading $DESC ..."
+ kill -s 1 $pid || exit $?
+ ;;
+ *)
+ echo "$DESC is not running; none reloaded." >&2
+ ;;
+ esac
+ exit $status
+}
+
+
+#
+# Function that shows the daemon/service status
+#
+status_of_proc () {
+ local pid status
+
+ status=0
+ # pidof output null when no program is running, so no "2>/dev/null".
+ pid=`pidofproc $NAME` || status=$?
+ case $status in
+ 0)
+ echo "$DESC is running ($pid)."
+ exit 0
+ ;;
+ *)
+ echo "$DESC is not running." >&2
+ exit $status
+ ;;
+ esac
+}
+
+case "$1" in
+start)
+ do_start
+ ;;
+stop)
+ do_stop || exit $?
+ ;;
+status)
+ status_of_proc
+ ;;
+restart)
+ # Always start the service regardless the status of do_stop
+ do_stop
+ do_start
+ ;;
+try-restart|force-reload)
+ # force-reload is the same as reload or try-restart according
+ # to its definition, the reload is not implemented here, so
+ # force-reload is the alias of try-restart here, but it should
+ # be the alias of reload if reload is implemented.
+ #
+ # Only start the service when do_stop succeeds
+ do_stop && do_start
+ ;;
+#reload)
+ # If the "reload" action is implemented properly, then let the
+ # force-reload be the alias of reload, and remove it from
+ # try-restart|force-reload)
+ #
+ #do_reload
+ #;;
+*)
+ echo "Usage: $0 {start|stop|status|restart|try-restart|force-reload}" >&2
+ exit 3
+ ;;
+esac
+
diff --git a/meta-skeleton/recipes-skeleton/service/service/skeleton_test.c b/meta-skeleton/recipes-skeleton/service/service/skeleton_test.c
new file mode 100644
index 0000000..465d430
--- /dev/null
+++ b/meta-skeleton/recipes-skeleton/service/service/skeleton_test.c
@@ -0,0 +1,11 @@
+#include <unistd.h>
+
+/* This demo does nothing except for testing /etc/init.d/skeleton */
+
+int
+main () {
+ daemon (0, 0);
+ while (1) {
+ sleep (1);
+ }
+}
diff --git a/meta-skeleton/recipes-skeleton/service/service_0.1.bb b/meta-skeleton/recipes-skeleton/service/service_0.1.bb
new file mode 100644
index 0000000..22137a5
--- /dev/null
+++ b/meta-skeleton/recipes-skeleton/service/service_0.1.bb
@@ -0,0 +1,32 @@
+DESCRIPTION = "The canonical example of init scripts"
+SECTION = "base"
+LICENSE = "GPLv2"
+LIC_FILES_CHKSUM = "file://${WORKDIR}/COPYRIGHT;md5=349c872e0066155e1818b786938876a4"
+RDEPENDS_${PN} = "initscripts"
+PR = "r0"
+
+SRC_URI = "file://skeleton \
+ file://skeleton_test.c \
+ file://COPYRIGHT \
+ "
+
+CONFFILES_${PN} += "${sysconfdir}/init.d/skeleton"
+
+do_compile () {
+ ${CC} ${WORKDIR}/skeleton_test.c -o ${WORKDIR}/skeleton-test
+}
+
+do_install () {
+ install -d ${D}${sysconfdir}/init.d
+ cat ${WORKDIR}/skeleton | \
+ sed -e 's,/etc,${sysconfdir},g' \
+ -e 's,/usr/sbin,${sbindir},g' \
+ -e 's,/var,${localstatedir},g' \
+ -e 's,/usr/bin,${bindir},g' \
+ -e 's,/usr,${prefix},g' > ${D}${sysconfdir}/init.d/skeleton
+ chmod a+x ${D}${sysconfdir}/init.d/skeleton
+
+ install -d ${D}${sbindir}
+ install -m 0755 ${WORKDIR}/skeleton-test ${D}${sbindir}/
+}
+
--
1.7.1
More information about the poky
mailing list