bash 中的脚本命令有何用途?

bash 中的脚本命令有何用途?

我曾多次看到使用 script 命令的 bash 脚本。我使用 man script 并向我展示了script - make typescript of terminal session

之后我用谷歌搜索了一下,但没有找到任何有用的东西。我有两个问题。它们是:

1-命令有什么用script

2-为什么命令script -qc "exit 1"返回退出代码 0?

答案1

man script

脚本- 制作终端会话的打字稿

script 将终端上显示的所有内容打印成一份脚本。对于需要交互式会话的硬拷贝记录作为作业证明的学生来说,这很有用,因为稍后可以使用 lpr(1) 打印出脚本文件。

Atypescript“已输入的文本或文档的副本”。因此,该命令基本上记录了会话。

答案2

1-脚本命令有什么用?

有时,命令在与其一起使用的其他命令的上下文中更有意义。如果您查看SEE ALSO手册页的部分,您会看到:

SEE ALSO
       csh(1) (for the history mechanism), scriptreplay(1), scriptlive(1),

检查scriptreplay

NAME
       scriptreplay - play back typescripts, using timing information

SYNOPSIS
       scriptreplay [options] [-t] timingfile [typescript [divisor]]

DESCRIPTION
       This  program  replays a typescript, using timing information to ensure
       that output happens in the same rhythm as it originally  appeared  when
       the script was recorded.

       The  replay  simply  displays  the information again; the programs that
       were run when the typescript was being  recorded  are  not  run  again.

检查scriptlive

NAME
       scriptlive - re-run session typescripts, using timing information

SYNOPSIS
       scriptlive [options] [-t] timingfile [-I|-B] typescript

DESCRIPTION
       This  program  re-runs  a typescript, using stdin typescript and timing
       information to ensure that input happens in the same rhythm as it orig‐
       inally appeared when the script was recorded.

       The  session  is  executed  in  a newly created pseudoterminal with the
       user's $SHELL (or defaults to /bin/bash).

因此,script您可以使用录音来重播会话(如视频但带有文本),或重新执行它。如果您想在途易并可选择在相同时间重复您的动作。

2-为什么命令脚本 -qc“exit 1”返回退出代码 0?

它的主要工作是记录,因此当它成功记录时返回成功是有意义的,即使它记录失败。但是,如果您希望传递返回值,也可以这样做-e--return

 -e, --return
        Return the exit status of the child process.  Uses the same for‐
        mat as bash termination on signal termination (i.e., exit status
        is 128 + the signal number).   The  exit  status  of  the  child
        process is always stored in the type script file too.

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