service脚本的编写
service管理的服务需要将其脚本文件放在/etc/init.d目录中
#!/bin/bash
#
# Comments to support chkconfig
# chkconfig: - 98 02
# description: 服务名称 service script
#
# Source function library.
. /etc/init.d/functions
### Default variables
prog_name="服务名称"
prog_path="/usr/bin/服务名称启动文件名"
pidfile="/var/run/服务名称启动文件名.pid"
options="-c 配文件件路径"
# Check if requirements are met
[ -x "脚本路径" ] || exit 1
RETVAL=0
start(){
echo -n $"Starting 脚本名称: "
daemon $prog_path $options
RETVAL=$?
PID=$(pidof ${prog_path})
[ ! -z "${PID}" ] && echo ${PID} > ${pidfile}
echo
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/$prog_name
return $RETVAL
}
stop(){
echo -n $"Shutting down $prog_name: "
killproc -p ${pidfile}
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/$prog_name
return $RETVAL
}
restart() {
stop
start
}
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
restart
;;
status)
status $prog_path
RETVAL=$?
;;
*)
echo $"Usage: $0 {start|stop|restart|status}"
RETVAL=1
esac
exit $RETVAL
cat /etc/init.d/functions
-*-Shell-script-*-
#
# functions This file contains functions to be used by most or all
# shell scripts in the /etc/init.d directory.
#
TEXTDOMAIN=initscripts
# Make sure umask is sane
umask 022
# Set up a default search path.
PATH="/sbin:/usr/sbin:/bin:/usr/bin"
export PATH
if [ $PPID -ne 1 -a -z "$SYSTEMCTL_SKIP_REDIRECT" ] && \
[ -d /run/systemd/system ] ; then
case "$0" in
/etc/init.d/*|/etc/rc.d/init.d/*)
_use_systemctl=1
;;
esac
fi
systemctl_redirect () {
local s
local prog=${1##*/}
local command=$2
local options=""
case "$command" in
start)
s=$"Starting $prog (via systemctl): "
;;
stop)
s=$"Stopping $prog (via systemctl): "
;;
reload|try-reload)
s=$"Reloading $prog configuration (via systemctl): "
;;
restart|try-restart|condrestart)
s=$"Restarting $prog (via systemctl): "
;;
esac
if [ -n "$SYSTEMCTL_IGNORE_DEPENDENCIES" ] ; then
options="--ignore-dependencies"
fi
if ! systemctl show "$prog.service" > /dev/null 2>&1 || \
systemctl show -p LoadState "$prog.service" | grep -q 'not-found' ; then
action $"Reloading systemd: " /bin/systemctl daemon-reload
fi
action "$s" /bin/systemctl $options $command "$prog.service"
}
# Get a sane screen width
[ -z "${COLUMNS:-}" ] && COLUMNS=80
# Read in our configuration
if [ -z "${BOOTUP:-}" ]; then
if [ -f /etc/sysconfig/init ]; then
. /etc/sysconfig/init
else
# verbose ->> very (very!) old bootup look (prior to RHL-6.0?)
# color ->> default bootup look
# other ->> default bootup look without ANSI colors or positioning
BOOTUP=color
# Column to start "[ OK ]" label in:
RES_COL=60
# terminal sequence to move to that column:
MOVE_TO_COL="echo -en \\033[${RES_COL}G"
# Terminal sequence to set color to a 'success' (bright green):
SETCOLOR_SUCCESS="echo -en \\033[1;32m"
# Terminal sequence to set color to a 'failure' (bright red):
SETCOLOR_FAILURE="echo -en \\033[1;31m"
# Terminal sequence to set color to a 'warning' (bright yellow):
SETCOLOR_WARNING="echo -en \\033[1;33m"
# Terminal sequence to reset to the default color:
SETCOLOR_NORMAL="echo -en \\033[0;39m"
# Verbosity of logging:
LOGLEVEL=1
fi
# NOTE: /dev/ttyS* is serial console. "not a tty" is such as
# /dev/null associated when executed under systemd service units.
if LANG=C tty | grep --quiet -e '\(/dev/ttyS\|not a tty\)'; then
BOOTUP=serial
MOVE_TO_COL=
SETCOLOR_SUCCESS=
SETCOLOR_FAILURE=
SETCOLOR_WARNING=
SETCOLOR_NORMAL=
fi
fi
# Check if any of $pid (could be plural) are running
checkpid() {
local i
for i in $* ; do
[ -d "/proc/$i" ] && return 0
done
return 1
}
__kill_pids_term_kill_checkpids() {
local base_stime=$1
shift 1
local pid=
local pids=$*
local remaining=
local stat=
local stime=
for pid in $pids ; do
[ ! -e "/proc/$pid" ] && continue
read -r line < "/proc/$pid/stat" 2> /dev/null
stat=($line)
stime=${stat[21]}
[ -n "$stime" ] && [ "$base_stime" -lt "$stime" ] && continue
remaining+="$pid "
done
echo "$remaining"
[ -n "$remaining" ] && return 1
return 0
}
__kill_pids_term_kill() {
local try=0
local delay=3;
local pid=
local stat=
local base_stime=
# We can't initialize stat & base_stime on the same line where 'local'
# keyword is, otherwise the sourcing of this file will fail for ksh...
stat=($(< /proc/self/stat))
base_stime=${stat[21]}
if [ "$1" = "-d" ]; then
delay=$2
shift 2
fi
local kill_list=$*
kill_list=$(__kill_pids_term_kill_checkpids $base_stime $kill_list)
[ -z "$kill_list" ] && return 0
kill -TERM $kill_list >/dev/null 2>&1
sleep 0.1
kill_list=$(__kill_pids_term_kill_checkpids $base_stime $kill_list)
if [ -n "$kill_list" ] ; then
while [ $try -lt $delay ] ; do
sleep 1
kill_list=$(__kill_pids_term_kill_checkpids $base_stime $kill_list)
[ -z "$kill_list" ] && break
let try+=1
done
if [ -n "$kill_list" ] ; then
kill -KILL $kill_list >/dev/null 2>&1
sleep 0.1
kill_list=$(__kill_pids_term_kill_checkpids $base_stime $kill_list)
fi
fi
[ -n "$kill_list" ] && return 1
return 0
}
# __proc_pids {program} [pidfile]
# Set $pid to pids from /run* for {program}. $pid should be declared
# local in the caller.
# Returns LSB exit code for the 'status' action.
__pids_var_run() {
local base=${1##*/}
local pid_file=${2:-/run/$base.pid}
local pid_dir=$(/usr/bin/dirname $pid_file > /dev/null)
local binary=$3
[ -d "$pid_dir" ] && [ ! -r "$pid_dir" ] && return 4
pid=
if [ -f "$pid_file" ] ; then
local line p
[ ! -r "$pid_file" ] && return 4 # "user had insufficient privilege"
while : ; do
read line
[ -z "$line" ] && break
for p in $line ; do
if [ -z "${p//[0-9]/}" ] && [ -d "/proc/$p" ] ; then
if [ -n "$binary" ] ; then
local b=$(readlink /proc/$p/exe | sed -e 's/\s*(deleted)$//')
[ "$b" != "$binary" ] && continue
fi
pid="$pid $p"
fi
done
done < "$pid_file"
if [ -n "$pid" ]; then
return 0
fi
return 1 # "Program is dead and /run pid file exists"
fi
return 3 # "Program is not running"
}
# Output PIDs of matching processes, found using pidof
__pids_pidof() {
pidof -c -m -o $$ -o $PPID -o %PPID -x "$1" || \
pidof -c -m -o $$ -o $PPID -o %PPID -x "${1##*/}"
}
# A function to start a program.
daemon() {
# Test syntax.
local gotbase= force= nicelevel corelimit
local pid base= user= nice= bg= pid_file=
local cgroup=
nicelevel=0
while [ "$1" != "${1##[-+]}" ]; do
case $1 in
'')
echo $"$0: Usage: daemon [+/-nicelevel] {program}" "[arg1]..."
return 1
;;
--check)
base=$2
gotbase="yes"
shift 2
;;
--check=?*)
base=${1#--check=}
gotbase="yes"
shift
;;
--user)
user=$2
shift 2
;;
--user=?*)
user=${1#--user=}
shift
;;
--pidfile)
pid_file=$2
shift 2
;;
--pidfile=?*)
pid_file=${1#--pidfile=}
shift
;;
--force)
force="force"
shift
;;
[-+][0-9]*)
nice="nice -n $1"
shift
;;
*)
echo $"$0: Usage: daemon [+/-nicelevel] {program}" "[arg1]..."
return 1
;;
esac
done
# Save basename.
[ -z "$gotbase" ] && base=${1##*/}
# See if it's already running. Look *only* at the pid file.
__pids_var_run "$base" "$pid_file"
[ -n "$pid" -a -z "$force" ] && return
# make sure it doesn't core dump anywhere unless requested
corelimit="ulimit -S -c ${DAEMON_COREFILE_LIMIT:-0}"
# if they set NICELEVEL in /etc/sysconfig/foo, honor it
[ -n "${NICELEVEL:-}" ] && nice="nice -n $NICELEVEL"
# if they set CGROUP_DAEMON in /etc/sysconfig/foo, honor it
if [ -n "${CGROUP_DAEMON}" ]; then
if [ ! -x /bin/cgexec ]; then
echo -n "Cgroups not installed"; warning
echo
else
cgroup="/bin/cgexec";
for i in $CGROUP_DAEMON; do
cgroup="$cgroup -g $i";
done
fi
fi
# Echo daemon
[ "${BOOTUP:-}" = "verbose" -a -z "${LSB:-}" ] && echo -n " $base"
# And start it up.
if [ -z "$user" ]; then
$cgroup $nice /bin/bash -c "$corelimit >/dev/null 2>&1 ; $*"
else
$cgroup $nice runuser -s /bin/bash $user -c "$corelimit >/dev/null 2>&1 ; $*"
fi
[ "$?" -eq 0 ] && success $"$base startup" || failure $"$base startup"
}
# A function to stop a program.
killproc() {
local RC killlevel= base pid pid_file= delay try binary=
RC=0; delay=3; try=0
# Test syntax.
if [ "$#" -eq 0 ]; then
echo $"Usage: killproc [-p pidfile] [ -d delay] {program} [-signal]"
return 1
fi
if [ "$1" = "-p" ]; then
pid_file=$2
shift 2
fi
if [ "$1" = "-b" ]; then
if [ -z $pid_file ]; then
echo $"-b option can be used only with -p"
echo $"Usage: killproc -p pidfile -b binary program"
return 1
fi
binary=$2
shift 2
fi
if [ "$1" = "-d" ]; then
delay=$(echo $2 | awk -v RS=' ' -v IGNORECASE=1 '{if($1!~/^[0-9.]+[smhd]?$/) exit 1;d=$1~/s$|^[0-9.]*$/?1:$1~/m$/?60:$1~/h$/?60*60:$1~/d$/?24*60*60:-1;if(d==-1) exit 1;delay+=d*$1} END {printf("%d",delay+0.5)}')
if [ "$?" -eq 1 ]; then
echo $"Usage: killproc [-p pidfile] [ -d delay] {program} [-signal]"
return 1
fi
shift 2
fi
# check for second arg to be kill level
[ -n "${2:-}" ] && killlevel=$2
# Save basename.
base=${1##*/}
# Find pid.
__pids_var_run "$1" "$pid_file" "$binary"
RC=$?
if [ -z "$pid" ]; then
if [ -z "$pid_file" ]; then
pid="$(__pids_pidof "$1")"
else
[ "$RC" = "4" ] && { failure $"$base shutdown" ; return $RC ;}
fi
fi
# Kill it.
if [ -n "$pid" ] ; then
[ "$BOOTUP" = "verbose" -a -z "${LSB:-}" ] && echo -n "$base "
if [ -z "$killlevel" ] ; then
__kill_pids_term_kill -d $delay $pid
RC=$?
[ "$RC" -eq 0 ] && success $"$base shutdown" || failure $"$base shutdown"
# use specified level only
else
if checkpid $pid; then
kill $killlevel $pid >/dev/null 2>&1
RC=$?
[ "$RC" -eq 0 ] && success $"$base $killlevel" || failure $"$base $killlevel"
elif [ -n "${LSB:-}" ]; then
RC=7 # Program is not running
fi
fi
else
if [ -n "${LSB:-}" -a -n "$killlevel" ]; then
RC=7 # Program is not running
else
failure $"$base shutdown"
RC=0
fi
fi
# Remove pid file if any.
if [ -z "$killlevel" ]; then
rm -f "${pid_file:-/run/$base.pid}"
fi
return $RC
}
# A function to find the pid of a program. Looks *only* at the pidfile
pidfileofproc() {
local pid
# Test syntax.
if [ "$#" = 0 ] ; then
echo $"Usage: pidfileofproc {program}"
return 1
fi
__pids_var_run "$1"
[ -n "$pid" ] && echo $pid
return 0
}
# A function to find the pid of a program.
pidofproc() {
local RC pid pid_file=
# Test syntax.
if [ "$#" = 0 ]; then
echo $"Usage: pidofproc [-p pidfile] {program}"
return 1
fi
if [ "$1" = "-p" ]; then
pid_file=$2
shift 2
fi
fail_code=3 # "Program is not running"
# First try "/run/*.pid" files
__pids_var_run "$1" "$pid_file"
RC=$?
if [ -n "$pid" ]; then
echo $pid
return 0
fi
[ -n "$pid_file" ] && return $RC
__pids_pidof "$1" || return $RC
}
status() {
local base pid lock_file= pid_file= binary=
# Test syntax.
if [ "$#" = 0 ] ; then
echo $"Usage: status [-p pidfile] {program}"
return 1
fi
if [ "$1" = "-p" ]; then
pid_file=$2
shift 2
fi
if [ "$1" = "-l" ]; then
lock_file=$2
shift 2
fi
if [ "$1" = "-b" ]; then
if [ -z $pid_file ]; then
echo $"-b option can be used only with -p"
echo $"Usage: status -p pidfile -b binary program"
return 1
fi
binary=$2
shift 2
fi
base=${1##*/}
if [ "$_use_systemctl" = "1" ]; then
systemctl status ${0##*/}.service
ret=$?
# LSB daemons that dies abnormally in systemd looks alive in systemd's eyes due to RemainAfterExit=yes
# lets adjust the reality a little bit
if systemctl show -p ActiveState ${0##*/}.service | grep -q '=active$' && \
systemctl show -p SubState ${0##*/}.service | grep -q '=exited$' ; then
ret=3
fi
return $ret
fi
# First try "pidof"
__pids_var_run "$1" "$pid_file" "$binary"
RC=$?
if [ -z "$pid_file" -a -z "$pid" ]; then
pid="$(__pids_pidof "$1")"
fi
if [ -n "$pid" ]; then
echo $"${base} (pid $pid) is running..."
return 0
fi
case "$RC" in
0)
echo $"${base} (pid $pid) is running..."
return 0
;;
1)
echo $"${base} dead but pid file exists"
return 1
;;
4)
echo $"${base} status unknown due to insufficient privileges."
return 4
;;
esac
if [ -z "${lock_file}" ]; then
lock_file=${base}
fi
# See if /var/lock/subsys/${lock_file} exists
if [ -f /var/lock/subsys/${lock_file} ]; then
echo $"${base} dead but subsys locked"
return 2
fi
echo $"${base} is stopped"
return 3
}
echo_success() {
[ "$BOOTUP" = "color" ] && $MOVE_TO_COL
echo -n "["
[ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
echo -n $" OK "
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
echo -n "]"
echo -ne "\r"
return 0
}
echo_failure() {
[ "$BOOTUP" = "color" ] && $MOVE_TO_COL
echo -n "["
[ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
echo -n $"FAILED"
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
echo -n "]"
echo -ne "\r"
return 1
}
echo_passed() {
[ "$BOOTUP" = "color" ] && $MOVE_TO_COL
echo -n "["
[ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
echo -n $"PASSED"
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
echo -n "]"
echo -ne "\r"
return 1
}
echo_warning() {
[ "$BOOTUP" = "color" ] && $MOVE_TO_COL
echo -n "["
[ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
echo -n $"WARNING"
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
echo -n "]"
echo -ne "\r"
return 1
}
# Inform the graphical boot of our current state
update_boot_stage() {
if [ -x /bin/plymouth ]; then
/bin/plymouth --update="$1"
fi
return 0
}
# Log that something succeeded
success() {
[ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_success
return 0
}
# Log that something failed
failure() {
local rc=$?
[ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_failure
[ -x /bin/plymouth ] && /bin/plymouth --details
return $rc
}
# Log that something passed, but may have had errors. Useful for fsck
passed() {
local rc=$?
[ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_passed
return $rc
}
# Log a warning
warning() {
local rc=$?
[ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_warning
return $rc
}
# Run some action. Log its output.
action() {
local STRING rc
STRING=$1
echo -n "$STRING "
shift
"$@" && success $"$STRING" || failure $"$STRING"
rc=$?
echo
return $rc
}
# returns OK if $1 contains $2
strstr() {
[ "${1#*$2*}" = "$1" ] && return 1
return 0
}
# Check whether file $1 is a backup or rpm-generated file and should be ignored
is_ignored_file() {
case "$1" in
*~ | *.bak | *.old | *.orig | *.rpmnew | *.rpmorig | *.rpmsave)
return 0
;;
esac
return 1
}
# Convert the value ${1} of time unit ${2}-seconds into seconds:
convert2sec() {
local retval=""
case "${2}" in
deci) retval=$(awk "BEGIN {printf \"%.1f\", ${1} / 10}") ;;
centi) retval=$(awk "BEGIN {printf \"%.2f\", ${1} / 100}") ;;
mili) retval=$(awk "BEGIN {printf \"%.3f\", ${1} / 1000}") ;;
micro) retval=$(awk "BEGIN {printf \"%.6f\", ${1} / 1000000}") ;;
nano) retval=$(awk "BEGIN {printf \"%.9f\", ${1} / 1000000000}") ;;
piko) retval=$(awk "BEGIN {printf \"%.12f\", ${1} / 1000000000000}") ;;
esac
echo "${retval}"
}
# Evaluate shvar-style booleans
is_true() {
case "$1" in
[tT] | [yY] | [yY][eE][sS] | [oO][nN] | [tT][rR][uU][eE] | 1)
return 0
;;
esac
return 1
}
# Evaluate shvar-style booleans
is_false() {
case "$1" in
[fF] | [nN] | [nN][oO] | [oO][fF][fF] | [fF][aA][lL][sS][eE] | 0)
return 0
;;
esac
return 1
}
# Apply sysctl settings, including files in /etc/sysctl.d
apply_sysctl() {
if [ -x /lib/systemd/systemd-sysctl ]; then
/lib/systemd/systemd-sysctl
else
for file in /usr/lib/sysctl.d/*.conf ; do
is_ignored_file "$file" && continue
[ -f /run/sysctl.d/${file##*/} ] && continue
[ -f /etc/sysctl.d/${file##*/} ] && continue
test -f "$file" && sysctl -e -p "$file" >/dev/null 2>&1
done
for file in /run/sysctl.d/*.conf ; do
is_ignored_file "$file" && continue
[ -f /etc/sysctl.d/${file##*/} ] && continue
test -f "$file" && sysctl -e -p "$file" >/dev/null 2>&1
done
for file in /etc/sysctl.d/*.conf ; do
is_ignored_file "$file" && continue
test -f "$file" && sysctl -e -p "$file" >/dev/null 2>&1
done
sysctl -e -p /etc/sysctl.conf >/dev/null 2>&1
fi
}
# A sed expression to filter out the files that is_ignored_file recognizes
__sed_discard_ignored_files='/\(~\|\.bak\|\.old\|\.orig\|\.rpmnew\|\.rpmorig\|\.rpmsave\)$/d'
if [ "$_use_systemctl" = "1" ]; then
if [ "x$1" = xstart -o \
"x$1" = xstop -o \
"x$1" = xrestart -o \
"x$1" = xreload -o \
"x$1" = xtry-restart -o \
"x$1" = xforce-reload -o \
"x$1" = xcondrestart ] ; then
systemctl_redirect $0 $1
exit $?
fi
fi
strstr "$(cat /proc/cmdline)" "rc.debug" && set -x
return 0
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