下面，您为要执行的命令设置一些全局变量，为响应消息设置一个缓冲区，并设置一个哈希来包含来自触发器消息的字段(见清单4)。

Next, you set up global variables for the command to be executed, a buffer for response messages, and a hash that will contain the fields from the trigger message (Listing 4).

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在该脚本中，(通过设置FS变量)在代码中指定字段分隔符，而前一示例通过在命令行向awk传递- F “： ”选项来设置FS。

In this script, the field separator is specified within the code itself (by setting the FS variable), while our previous example set FS by passing the -f ":" option to awk on the command line.

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如前所述，这个变量支持设置awk期望在字段中找到的字符序列。

As mentioned earlier, this variable allows you to set the character sequence that awk expects to find between fields.

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