Hdridder: Created page with "Category:Linux/Unix Startup scripts are in `/etc/init.d` If /lib/init/init-d-script is on your system startup scripts can be as easy as this. Customizations..."

2020-09-25T12:48:28Z

Created page with "Category:Linux/Unix Startup scripts are in <code>/etc/init.d</code> If /lib/init/init-d-script is on your system startup scripts can be as easy as this. Customizations..."

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[[Category:Linux/Unix]]

Startup scripts are in <code>/etc/init.d</code>

If /lib/init/init-d-script is on your system startup scripts can be as easy as this.
Customizations can be done by copying functions form the init-d-script to your startup script.

<syntaxhighlight lang=bash>

#!/bin/sh
# kFreeBSD do not accept scripts as interpreters, using #!/bin/sh and sourcing.
if [ true != "$INIT_D_SCRIPT_SOURCED" ] ; then
set "$0" "$@"; INIT_D_SCRIPT_SOURCED=true . /lib/init/init-d-script
fi
### BEGIN INIT INFO
# Provides: skeleton
# Required-Start: $remote_fs $syslog
# Required-Stop: $remote_fs $syslog
# 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. This example start a
# single forking daemon capable of writing a pid
# file. To get other behavoirs, implemend
# do_start(), do_stop() or other functions to
# override the defaults in /lib/init/init-d-script.
### END INIT INFO

# Author: Foo Bar <foobar@baz.org>
#
# Please remove the "Author" lines above and replace them
# with your own name if you copy and modify this script.

DESC="Description of the service"
DAEMON=/usr/sbin/daemonexecutablename
DAEMON_ARGS=""

</syntaxhighlight>

=/lib/init/init-d-script=

<syntaxhighlight lang=bash>
#!/bin/sh
# See init-d-script(5) for instructions on how to use this library.
#=============================================================================
# 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

# PATH should only include /usr/* if it runs after the mountnfs.sh
# script. Scripts running before mountnfs.sh should remove the /usr/*
# entries.
PATH=/sbin:/usr/sbin:/bin:/usr/bin
export PATH

is_call_implemented() {
command -V $1 > /dev/null 2>&1
}

do_usage() {
if is_call_implemented do_reload ; then
echo "Usage: $SCRIPTNAME {start|stop|status|reload|restart|try-restart|force-reload}" >&2
else
echo "Usage: $SCRIPTNAME {start|stop|status|restart|try-restart|force-reload}" >&2
fi
}

call() {
cmd="$1"
shift
if is_call_implemented ${cmd}_override ; then
${cmd}_override "$@"
else
${cmd} "$@"
fi
}

#
# Function that starts the daemon/service
#

# Return
# 0 if daemon has been started
# 1 if daemon was already running
# 2 if daemon could not be started
do_start_cmd() {
start-stop-daemon --start --quiet ${PIDFILE:+--pidfile ${PIDFILE}} \
$START_ARGS \
--startas $DAEMON --name $NAME --exec $DAEMON --test > /dev/null \
|| return 1
start-stop-daemon --start --quiet ${PIDFILE:+--pidfile ${PIDFILE}} \
$START_ARGS \
--startas $DAEMON --name $NAME --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.
}

do_start()
{
if is_call_implemented do_start_prepare ; then
call do_start_prepare
fi
[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
call do_start_cmd
case "$?" in
0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
esac
if is_call_implemented do_start_cleanup ; then
call do_start_cleanup
fi
}

#
# Function that stops the daemon/service
#

# 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
do_stop_cmd() {
start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 \
$STOP_ARGS \
${PIDFILE:+--pidfile ${PIDFILE}} --name $NAME --exec $DAEMON
RETVAL="$?"
[ "$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 \
$STOP_ARGS \
--exec $DAEMON
[ "$?" = 2 ] && return 2
# Many daemons don't delete their pidfiles when they exit.
rm -f $PIDFILE
return $RETVAL
}

do_stop()
{
if is_call_implemented do_stop_prepare ; then
call do_stop_prepare
fi
[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
call do_stop_cmd
case "$?" in
0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
esac
if is_call_implemented do_stop_cleanup ; then
call do_stop_cleanup
fi
}

do_restart() {
[ "$VERBOSE" != no ] && log_daemon_msg "Restarting $DESC" "$NAME"
call do_stop_cmd
call do_start_cmd
case "$?" in
0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
esac
}

do_force_reload() {
if is_call_implemented do_reload ; then
call do_reload
else
call do_restart
fi
}

# Enable this using
# alias do_reload=do_reload_sigusr1
do_reload_sigusr1() {
log_daemon_msg "Reloading $DESC configuration files" "$NAME"
start-stop-daemon --oknodo --stop --signal 1 --quiet \
--pidfile "$PIDFILE" --exec "$DAEMON"
log_end_msg $?
}

do_status() {
status_of_proc "$DAEMON" "$NAME" && return 0 || return $?
}

if [ "$DEBUG" = "true" ] ; then
set -x
fi

SCRIPTNAME=$1
scriptbasename="$(basename $1)"
if [ "$scriptbasename" != "init-d-script" ] ; then
script="$1"
shift
. $script
else
exit 0
fi

NAME=${NAME:=$(basename $DAEMON)}
DESC=${DESC:=$NAME}

# Do not use pid file if $PIDFILE is 'none'. Otherwise, generate from
# $NAME or use the value provided by the init.d script.
if [ none = "$PIDFILE" ] ; then
PIDFILE=
elif [ -z "$PIDFILE" ] ; then
PIDFILE=/var/run/$NAME.pid
fi

# Exit if the package is not installed
if [ none != "$DAEMON" ] && [ ! -x "$DAEMON" ] ; then
exit 0
fi

# 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
if [ -t 0 ] ; then # Be verbose when called from a terminal
VERBOSE=yes
fi

case "$1" in
start)
call do_start
;;
stop)
call do_stop
;;
status)
call do_status
;;
reload)
if is_call_implemented do_reload ; then
do_reload
else
call do_usage
exit 3
fi
;;
force-reload)
call do_force_reload
;;
restart)
call do_restart
;;
try-restart)
log_daemon_msg "Trying to restart $DESC" "$NAME"
if call do_status > /dev/null 2>&1 ; then
call do_restart
log_end_msg $?
else
log_progress_msg "is not running."
log_end_msg 1
fi
;;
'')
call do_usage
exit 3
;;
*)
if is_call_implemented do_unknown ; then
call do_unknown "$1"
exit 3
else
call do_usage
exit 3
fi
;;
esac
exit 0
</syntaxhighlight>

Linux/Unix:Startup - Revision history

Hdridder: Created page with "Category:Linux/Unix Startup scripts are in /etc/init.d If /lib/init/init-d-script is on your system startup scripts can be as easy as this. Customizations..."

Hdridder: Created page with "Category:Linux/Unix Startup scripts are in `/etc/init.d` If /lib/init/init-d-script is on your system startup scripts can be as easy as this. Customizations..."