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Groups > comp.lang.python > #57385

Re: Reading From stdin After Command Line Redirection

From Ben Finney <ben+python@benfinney.id.au>
Subject Re: Reading From stdin After Command Line Redirection
Date 2013-10-24 07:46 +1100
References <7cdlja-j3j2.ln1@ozzie.tundraware.com>
Newsgroups comp.lang.python
Message-ID <mailman.1427.1382561215.18130.python-list@python.org> (permalink)

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Tim Daneliuk <tundra@tundraware.com> writes:

> I have a program that runs like this:
>
>   foo.py <inputfile

That's one way to run it. If the user chooses to run it that way, they
have chosen deliberately to run the program non-interactively.

> I want to reconnect stdin to the tty as usual after 'inputfile'
> has been read so that things like raw_input and getpass
> will work as expected.

Why? That's at odds with how the user has already chosen to run the
program. If they wanted to run the program interactively, they wouldn't
have chosen to redirect standard input.

> So, after I do .... = sys.stdin.readlines(), how to I reopen
> stdin in its nonredirected mode?

There would be no point; standard input was never attached to the
console in the first place, it was attached (by the person who chose the
above invocation) to a different file instead. You've already read the
entire file.

Can you speak more about how you intend your program to be used? The
above request is incoherent, and I suspect you've made a design mistake.

-- 
 \       “Philosophy is questions that may never be answered. Religion |
  `\              is answers that may never be questioned.” —anonymous |
_o__)                                                                  |
Ben Finney

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Thread

Reading From stdin After Command Line Redirection Tim Daneliuk <tundra@tundraware.com> - 2013-10-23 12:25 -0500
  Re: Reading From stdin After Command Line Redirection Chris Angelico <rosuav@gmail.com> - 2013-10-24 07:40 +1100
  Re: Reading From stdin After Command Line Redirection Ben Finney <ben+python@benfinney.id.au> - 2013-10-24 07:46 +1100
  Re: Reading From stdin After Command Line Redirection Chris Angelico <rosuav@gmail.com> - 2013-10-24 07:52 +1100
  Re: Reading From stdin After Command Line Redirection random832@fastmail.us - 2013-10-23 17:01 -0400
  Re: Reading From stdin After Command Line Redirection Ben Finney <ben+python@benfinney.id.au> - 2013-10-24 09:20 +1100
    Re: Reading From stdin After Command Line Redirection Tim Daneliuk <tundra@tundraware.com> - 2013-10-23 19:09 -0500
      Re: Reading From stdin After Command Line Redirection Ben Finney <ben+python@benfinney.id.au> - 2013-10-24 14:53 +1100
        Re: Reading From stdin After Command Line Redirection Tim Daneliuk <tundra@tundraware.com> - 2013-10-23 23:36 -0500
        Re: Reading From stdin After Command Line Redirection Tim Daneliuk <tundra@tundraware.com> - 2013-10-23 23:39 -0500
        Re: Reading From stdin After Command Line Redirection Ben Finney <ben+python@benfinney.id.au> - 2013-10-24 15:54 +1100
          Re: Reading From stdin After Command Line Redirection Tim Daneliuk <tundra@tundraware.com> - 2013-10-24 06:58 -0500
          Re: Reading From stdin After Command Line Redirection Tim Daneliuk <tundra@tundraware.com> - 2013-10-24 06:58 -0500
            Re: Reading From stdin After Command Line Redirection Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-10-24 13:10 +0100
              Re: Reading From stdin After Command Line Redirection Tim Daneliuk <tundra@tundraware.com> - 2013-10-24 08:41 -0500
                Re: Reading From stdin After Command Line Redirection feedthetroll@gmx.de - 2013-10-24 07:36 -0700
                Re: Reading From stdin After Command Line Redirection Tim Daneliuk <tundra@tundraware.com> - 2013-10-24 09:43 -0500
              Re: Reading From stdin After Command Line Redirection Tim Daneliuk <tundra@tundraware.com> - 2013-10-24 08:41 -0500
                Re: Reading From stdin After Command Line Redirection Ethan Furman <ethan@stoneleaf.us> - 2013-10-24 07:30 -0700
      Re: Reading From stdin After Command Line Redirection Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-10-24 09:14 +0100
      Re: Reading From stdin After Command Line Redirection Ben Finney <ben+python@benfinney.id.au> - 2013-10-24 19:43 +1100
      Re: Reading From stdin After Command Line Redirection Tim Chase <python.list@tim.thechases.com> - 2013-10-24 05:45 -0500
      Re: Reading From stdin After Command Line Redirection Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-10-24 12:33 +0100
      Re: Reading From stdin After Command Line Redirection Ethan Furman <ethan@stoneleaf.us> - 2013-10-24 07:39 -0700
    Re: Reading From stdin After Command Line Redirection Tim Daneliuk <tundra@tundraware.com> - 2013-10-23 19:09 -0500
  Re: Reading From stdin After Command Line Redirection Chris Angelico <rosuav@gmail.com> - 2013-10-24 09:23 +1100

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