Linux下通过sed命令对kv方式的配置文件进行修改

$ cat test.conf 
max.connections = 100
test.log_path = \"/tmp/test.log\"
fsync=on

#!/bin/bash
CONF=test.conf
set_key_value() {
  local key=${1}
  local value=${2}
  if [ -n $value ]; then
    #echo $value
    local current=$(sed -n -e \"s/^\\($key = \'\\)\\([^ \']*\\)\\(.*\\)$/\\2/p\" $CONF) # value带单引号
    if [ -n $current ];then
      echo \"setting $CONF : $key = $value\"
      value=\"$(echo \"${value}\" | sed \'s|[&]|\\\\&|g\')\"
      sed -i \"s|^[#]*[ ]*${key}\\([ ]*\\)=.*|${key} = \'${value}\'|\" ${CONF}
    fi
  fi
}
set_key_value \"max.connections\" \"1024\"
set_key_value \"test.log_path\" \"/data/logs/test.log\"

CONF=test.conf
set_key_value() {
  local key=${1}
  local value=${2}
  if [ -n $value ]; then
    #echo $value
    local current=$(sed -n -e \"s/^\\($key = \\)\\([^ \']*\\)\\(.*\\)$/\\2/p\" $CONF) # value不带单引号
    if [ -n $current ];then
      echo \"setting $CONF : $key = $value\"
      value=\"$(echo \"${value}\" | sed \'s|[&]|\\\\&|g\')\"
      sed -i \"s|^[#]*[ ]*${key}\\([ ]*\\)=.*|${key} = ${value}|\" ${CONF}
    fi
  fi
}
set_key_value \"fsync\" \"off\"