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"