appInfo

#!/bin/bash

# 获取给定的应用程序的信息
# shellcheck disable=SC2009
# shellcheck disable=SC2012
# shellcheck disable=SC2002

appname=$1

function usage() {
    echo -e "Usage: "
    echo "  $0 <appname>"
    echo "      appname: The name of the application to get information."
    exit 1
}

# ============Main============
if [ -z $appname ]; then
    usage
fi

pids=`pgrep $appname`  # 获取应用程序的PID  pid=`ps -ef | grep $appname | grep -v grep | awk '{print $2}'`
#pid=`echo $pids | awk '{print $1}'`
i=1
npids=`echo $pids | wc -w`

for pid in $pids
do
    if [[ -z $pid ]]; then
        echo "The application $appname is not running."
        exit 2
    fi

    # 获取应用程序的启动时间
    starttime=`ps -p $pid -o lstart | grep -v STARTED`
    starttime=`date -d "$starttime" "+%Y-%m-%d %H:%M:%S"`

    # 获取应用程序的运行时间
    runtime=`ps -p $pid -o etime | grep -v ELAPSED`
    runtime=$(echo $runtime | awk -F'[-:]' '{printf "%02d days %02d hours %02d minutes %02d seconds", $1, $2, $3, $4}')

#    ports=`netstat -anp 2>/dev/null | grep $pid | grep LISTEN | awk '{print $4}' | awk -F: '{print $NF}'`
    ports=$(netstat -anp 2>/dev/null | grep $pid | grep LISTEN | awk '{print $4}' | grep -o '[0-9]*$')  # 获取应用程序的端口号

    cpu=`ps -p $pid -o pcpu | grep -v CPU`  # 获取应用程序的CPU占用率
    mem=`ps -p $pid -o pmem | grep -v MEM`  # 获取应用程序的内存占用率
    threads=`ps -p $pid -o nlwp | grep -v NLWP`  # 获取应用程序的线程数
    nfiles=`ls /proc/$pid/fd | wc -l`  # 获取应用程序的文件句柄数
    connections=`netstat -anp 2>/dev/null | grep -c $pid`  # 获取应用程序的网络连接数
    status=`ps -p $pid -o state --no-headers`  # 获取应用程序的状态
    args=$(tr '\0' ' ' < /proc/$pid/cmdline)  # 获取应用程序的命令行参数  args=`cat /proc/$pid/cmdline | tr -d '\000'`
    cwd=`ls -l /proc/$pid/cwd | awk '{print $NF}'`  # 获取应用程序的工作目录

    # 输出应用程序的信息
    if [ $i -eq 1 ]; then
        echo "===================================Application Information==================================="
    fi
    echo "Application: $appname-$i"
    echo "PID: $pid"
    echo "Start Time: $starttime"
    echo "Run Time: $runtime"
    echo "Arguments: $args"
    echo "Ports: $(echo $ports | tr '\n' ' ' | sed 's/,$//')"
    echo "CPU: $cpu"
    echo "Memory: $mem"
    echo "Threads: $threads"
    echo "Files: $nfiles"
    echo "Connections: $connections"
    echo "Status: $status"
    echo "Current Working Directory: $cwd"

    if [ $i -ge "$npids" ]; then
        echo "============================================================================================="
    else
        echo "-----------------------------------------------------------------------------------------------"

    fi
    i=$((i+1))

done