Some utilities, such as find, don't read from stdin.
某些实用工具，例如find并不从stdin读取内容。
If a filename arg was not given on the command line, we use stdin.
如果命令行上没有给出文件名参数，我们就使用标准输入。
And it could be any other command that can read from its stdin.
“other_command”可以是任何其它能从其标准输入读取的命令。
The -o option copies stdin to the named file. Here's an example.
o选项会将stdin复制到指定的file中。
Look for the loginSource property in the appropriate file and change it to specify stdin.
请查找合适文件中的loginsource属性，并更改它以指定stdin。
The main loop is entered to read every line on STDIN and extract relevant information.
进入主循环以读取STDIN 中的每一行并提取相关信息。
The main loop is entered to read every line on STDIN and extract relevant information.
进入主循环以读取STDIN 中的每一行并提取相关信息。
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