Question

您好我在下面的这一行收到错误

  BOOTPROTO="dhcp"
  TEST=$([[ "$BOOTPROTO" =~ (static|none|bootp|dhcp)$ ]] ; echo $?)

错误我得到的是

 -bash: command substitution: line 1: unexpected argument `(' to conditional   binary operator
 -bash: command substitution: line 1: syntax error near `(s'
 -bash: command substitution: line 1: `[[ "$BOOTPROTO" =~ (static|none|bootp|dhcp)$ ]] ; echo $?'

我试图手动运行但无法解决它

Answer 1

用报价包裹你的正则表达式：

  BOOTPROTO="dhcp"
  TEST=$([[ "$BOOTPROTO" =~ "(static|none|bootp|dhcp)$" ]] ; echo $?)
  echo "$TEST"

或者如果您使用Bash＆gt; = 3.2，则转义括号（正如Eric在评论中提到的那样。）

TEST=$([[ "$BOOTPROTO" =~ \(static|none|bootp|dhcp\)$ ]] ; echo $?)

<强>输出：

Answer 2

为什么不简单

[[ "$BOOTPROTO" =~ (static|none|bootp|dhcp)$ ]]
TEST=$?

bash脚本条件检查语句抛出错误

2 个答案: