linux程序守护进程（shell）

「爱情、让人受尽委屈。」 2022-08-09 09:53 23阅读 0赞

使用shell每秒检测一次程序是否在运行，如果没有运行则自动启动程序  
  
  
\#!/bin/bash  
  
  
\#配置文件路径  
CONFIGFILE="$1/config/Settings.ini"  
SLASH="="  
RESTARTLOG=" Daemon"  
shopt -s expand\_aliases  
alias DATETIME='date "+%Y-%m-%d %H:%M:%S"'

PROCESS="TraceProbe"

RNCKEY="enableRNCs"  
TRACEPROBE="/opt/TraceProbe/TraceProbe/TraceProbe"  
DSTATUS=0  
  
  
\#判断配置文件是否存在  
if \[ ! -f $CONFIGFILE \]; then  
echo "\`DATETIME\`$RESTARTLOG::ERROR: $CONFIGFILE do not exist!"  
exit  
fi  
  
  
\#读取配置文件信息  
ReadConfig()  
\{  
while read myline  
do  
CurrKey=\`echo $myline | awk -F '=' '\{print $1\}'\`  
CurrValue=\`echo $myline | awk -F '=' '\{print $2\}'\`

\#匹配配置文件中的内容，判断是否要启动被守护的进程

if \[ $CurrKey == $RNCKEY \]; then

if \[ -n "$CurrValue" \]; then  
if \[ -f "$TRACEPROBE" \]; then  
cd "$1"  
source "$1/scripts/utils"

getEnvFromOsEnv "$1"

\#设置DISPLAY的值

if \[ "$VDIS" == -1 \]; then  
DIS=\`who|grep $USER|grep tty\`  
DIS=$\{DIS\#\*(\}  
DIS=$\{DIS%\*)\}  
if \[ -z "$DIS" \]; then  
DIS=:0.0  
fi  
else  
DIS=$VDIS  
fi  
  
  
export DISPLAY="$DIS" && TraceProbe &  
if \[ "\`ps -el | grep -w "$PROCESS" | awk '\{print $14\}'\`" == "$PROCESS" \]; then  
echo "\`DATETIME\`$RESTARTLOG::INFO: Some RNCs need to be run!"  
echo -e "\`DATETIME\`$RESTARTLOG::INFO: DIS = $DIS\\n"  
echo -e "\`DATETIME\`$RESTARTLOG::INFO: Restart $TRACEPROBE successfully!\\n"  
DSTATUS=0  
else  
if \[ $DSTATUS -eq 0\];then  
echo "\`DATETIME\`$RESTARTLOG::INFO: Some RNCs need to be run!"  
echo -e "\`DATETIME\`$RESTARTLOG::INFO: DIS = $DIS\\n"  
echo -e "\`DATETIME\`$RESTARTLOG::INFO: Restart $TRACEPROBE unsuccessfully!\\n"  
DSTATUS=1  
fi  
fi  
fi  
fi  
fi  
done < $CONFIGFILE  
\}  
  
  
\#判断守护进程是否已存在，如果存在则结束本进程，如果不存在则本进程作为守护进程  
if \[ \`ps aux | grep -v grep | grep bash | awk '\{print $12\}' | grep "TraceProbe\_daemon" | wc -l\` -le 2 \];then  
echo "========================="  
echo -e "\`DATETIME\`$RESTARTLOG::INFO: TraceProbe\_daemon start!\\n"  
  
  
while true  
do  
\# only in bash，截取系统中需要守护的进程的名称，如果无此进程CurrProcesses为空  
CurrProcesses=\`ps -el | grep -w "$PROCESS" | awk '\{print $14\}'\`  
  
  
\#exist, exit  
if \[ "$CurrProcesses" != "$PROCESS" \]; then  
ReadConfig "$1"  
fi  
sleep 1  
done  
fi