[Linux]-常用代码块

1.读取执行的上级目录

　　basepath=$(cd `dirname $0`;cd ..; pwd)

2.Sudo切换用户并执行MySQL语句

　　echo '密码'|sudo -u mysqladmin -S /usr/local/mysql/bin/mysql -uMySQL用户名 -pMySQL密码 -e "delete xxxx;"

3.参数读取

if [[ $# -ge 1 ]]; then
  opt="$1"
  shift
  case "$opt" in
    -help)
      print_msg "$helpInfo"
    ;;
    -day)
        targetTime=`date -d "$1" "+%Y%m%d"`
        train_day $targetTime
    ;;
    -daysection)
        beginTime=`date -d "$1" "+%Y%m%d"`
        endTime=`date -d "$2" "+%Y%m%d"`
        while [ "$beginTime" -le "$endTime" ]
        do
            train_day $beginTime
            beginTime=`date -d "$beginTime +1 day " +%Y%m%d`
        done
    ;;
    *)
        print_msg "train_day参数错误 $helpInfo" -err
        exit 1
    ;;
  esac
else
  targetTime=`date -d "-1 day " +%Y%m%d`
  print_msg "默认统计昨日->$targetTime"
  train_day $targetTime
  exit 0
fi

Shell基础库

#!/bin/bash

function print_msg(){
  help='print_msg 消息内容 [-err | -waring | -info]'
  if [[ $# -eq 1 ]]; then
    echo -e "33[42m 33[01m $1 33[0m"
  elif [[ $# -ge 1 ]]; then
    msg=$1
    opt="$2"
    shift
    case "$opt" in
      -err)
        echo -e "33[41m 33[01m $msg 33[0m"
      ;;
      -waring)
        echo -e "33[43m 33[01m $msg 33[0m"
      ;;
      -info)
        echo -e "33[42m 33[01m $msg 33[0m"
      ;;
      *)
        echo -e "33[41m 33[01m print_msg错误: $help 33[0m"
        exit 1
      ;;
    esac
  else
    echo -e "33[41m 33[01m print_msg错误: $help 33[0m"
    exit 1
  fi
}
function read_conf(){
  help="read_conf 配置文件地址 配置节名"
  if [[ $# -eq 2 ]] ;then
    value=$(sed "/^$2=/!d;s/.*=//" $1)
    echo $value
  else
    print_msg 'read_conf参数错误:$help' -err
    exit 1
  fi
}