我正在为我的一个公司应用程序修改 init.d 脚本。显然我的 bash 脚本 foo 不够强大。
一旦 Launcher 看到 Dispatcher 已终止，它将退出。香草脚本总是[ FAILED ]在停止应用程序时显示，因为启动器在此脚本试图杀死它之前已经终止。
我尝试添加 2 秒的宽限期（充足），以便启动器终止，然后再尝试杀死它（如果它仍在运行）。
我有以下 stop() 函数：
#!/bin/bash
# chkconfig: 345 85 60
# description: .
# processname: xxx
# pidfile: /var/run/xxx.pid
# Source function library.
. /etc/rc.d/init.d/functions
RETVAL=0
PID_PATH=/tmp/
PID_PREFIX=xxx
LOCK_PATH=/tmp/
PIDFILE_D=${PID_PATH}${PID_PREFIX}_dispatcher.pid
PIDFILE_L=${PID_PATH}${PID_PREFIX}_launcher.pid
PIDFILE_J=${PID_PATH}${PID_PREFIX}_jobselector.pid
LOCK=${LOCK_PATH}${PID_PREFIX}
BASEPATH=`dirname $0`
echo $BASEPATH | grep -q "^/" && BASEPATH=`dirname $BASEPATH` || BASEPATH=$PWD/`dirname $BASEPATH`
# -- snip ---
stop() {
echo -n $"Shutting down Dispatcher: "
killproc -p $PIDFILE_D
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f $PIDFILE_D
echo -n $"Shutting down Launcher: "
# launcher self terminates once it sees the dispatcher is not running
# grace period of 2 seconds before explicitly killing it
if [ -e "$PIDFILE_L" ]; then
local i pid
read pid < "$PIDFILE_L"
for i in 1 2; do
if checkpid $pid 2>&1; then
sleep 1
fi
done
# if launcher still active after grace period, kill it
if checkpid $pid 2>&1; then
killproc -p $PIDFILE_L
RETVAL=$?
else
success $"$base shutdown"
fi
else
success $"$base shutdown"
fi
[ $RETVAL -eq 0 ] && rm -f $PIDFILE_L
echo -n $"Shutting down Job Selector: "
killproc -p $PIDFILE_J
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f $PIDFILE_J
[ $RETVAL -eq 0 ] && rm -f $LOCK
return $RETVAL
}
当我停止程序时，它不再显示“正在关闭启动器：...”行。
$ sudo ./bin/program stop
Shutting down Dispatcher: [ OK ]
Shutting down Job Selector: [ OK ]
支持功能：
killproc() {
local RC killlevel= base pid pid_file= delay
RC=0; delay=3
# 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" = "-d" ]; then
delay=$2
shift 2
fi
# check for second arg to be kill level
[ -n "${2:-}" ] && killlevel=$2
# Save basename.
base=${1##*/}
# Find pid.
__pids_var_run "$1" "$pid_file"
if [ -z "$pid_file" -a -z "$pid" ]; then
pid="$(__pids_pidof "$1")"
fi
# Kill it.
if [ -n "$pid" ] ; then
[ "$BOOTUP" = "verbose" -a -z "${LSB:-}" ] && echo -n "$base "
if [ -z "$killlevel" ] ; then
if checkpid $pid 2>&1; then
# TERM first, then KILL if not dead
kill -TERM $pid >/dev/null 2>&1
usleep 100000
if checkpid $pid && sleep 1 &&
checkpid $pid && sleep $delay &&
checkpid $pid ; then
kill -KILL $pid >/dev/null 2>&1
usleep 100000
fi
fi
checkpid $pid
RC=$?
[ "$RC" -eq 0 ] && failure $"$base shutdown" || success $"$base shutdown"
RC=$((! $RC))
# 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:-/var/run/$base.pid}"
fi
return $RC
}
# Check if $pid (could be plural) are running
checkpid() {
local i
for i in $* ; do
[ -d "/proc/$i" ] && return 0
done
return 1
}
# Log that something succeeded
success() {
#if [ -z "${IN_INITLOG:-}" ]; then
# initlog $INITLOG_ARGS -n $0 -s "$1" -e 1
#fi
[ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_success
return 0
}
echo_success() {
[ "$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
}
回声线中 $ 的相关性是什么？
echo -n $"Shutting down Launcher: "
如果我在调试行中添加：
echo "RETVAL=$RETVAL"
[ $RETVAL -eq 0 ] && rm -f $PIDFILE_L
我得到：
Shutting down Dispatcher: [FAILED]
RETVAL=0 down Launcher: [ OK ]
Shutting down Job Selector: [FAILED]
那里有任何 bash 脚本专家吗？