Linux shell 陣列

Linux shell 陣列

範例 1 : 重複執行同一件事

#設定陣列項目
  #陣列長度判斷 ${#arr[@]}
  arr_01=("cc" "cpu_lim_use" "cpu_lim_idle" "cpu_lim_load")

  i=1
  j=0
  while [ $i -le ${#arr[@]} ] 
  do

     new=f
     #等於某一個值
     set=${arr_01[$j]}
     #設定為特定值
     set_01=${arr[$i]}
     list=`cat tmon.conf | grep $set_01 `
     old=`cat tmon.conf | grep -w $set | grep -v '#' | awk -F \" '{print $2}'`
     echo " "
     echo "$i." $list
     echo " 原設定 : " $old
     read new

     if [ "$new" == "" ] ; then
        new=$old
     else
        sed -i -e "s/$set=\"$old\"/$set=\"$new\"/" tmon.conf
     fi

     new=`cat tmon.conf | grep -w $set | grep -v '#' | awk -F \" '{print $2}'`
     echo " 新設定 : " $new
     i=$(($i+1))
     j=$(($j+1))

  done

範例 2 : 檔案內容相似 ， 只有部分需調整

a=(topprd toptst toppth topstd topprd-ws)

  i=0
  n=5

  #陣列長度判讀 ${#a[@]}
  for ((i=0;i < ${#a[@]};i++))
  do
     echo ${a[$i]}
     b=${a[$i]}

  #檔案內容寫入
  cat << EOF > gas-$b.service
  #20220309 v3.1.02 add ( for linux kernel ) 
  #                     LimitSTACK=infinity
  #                     LimitNOFILE=infinity
  #                     TasksMax=2000000 ( memory not enough )

  [Unit]
  Description=Start Fastcgidispatch...

  [Service]
  EOF

  #需調整部分調整後再寫入
  cat << EOF >> gas-$b.service
  ExecStart=/u1/genero/gas/bin/fastcgidispatch -s -f /u1/genero/as-$b.xcf
  User=tiptop
  Group=tiptop
  Restart=always
  #LimitNOFILE=130000  #20220309 mark
  #202220309 add (s)
  LimitNOFILE=infinity
  LimitSTACK=infinity
  TasksMax=2000000
  #20220309 add (e)

  [Install]
  WantedBy=multi-user.target
  EOF

  chmod 664 gas-$b.service

  done

IFS=':'

set -A array `env | grep CLASSPATH`
echo ${array[0]}

echo '' > 123.txt

for index in "${!array[@]}"
do
    echo "$index ${array[index]}"
    if [ "${array[index]}" != "" ] ; then
       ls -l ${array[index]} >> 123.txt
    fi
done