[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: running parallel make jobs and avoiding jumbled/garbled output?
From: |
Per Jessen |
Subject: |
Re: running parallel make jobs and avoiding jumbled/garbled output? |
Date: |
Fri, 22 Feb 2008 18:39:27 +0100 |
User-agent: |
KNode/0.10.4 |
Paul Smith wrote:
> However, it sounds to me like the OP is seeing this issue even with
> output to stdout, which is already line-buffered (or is supposed to
> be). So, I think the issue might be more complex than that.
No, if I run the same 'make -j4' job in a terminal, there's no problem.
No garbling and no truncation of output.
> The thing is, it's not a problem with make at all. Make just runs
> programs and waits for them to finish. The programs (compilers, etc.)
> that make invokes are printing directly to stdout/stderr, themselves;
> make is not reading that output and emitting it again.
>
> I'm pretty sure that line buffering settings are user-space features,
> not process features, and as such they are not inherited by
> sub-processes but rather determined anew for every process that
> starts, based on its terminal settings, etc.
Hmm, when a new process is forked, I'm pretty certain the default is for
it to continue using whatever stdin/out/err settings the parent process
was using.
> That means the problem is not make, but rather the programs you're
> running are not setting stdout to be line-buffered explicitly. I'm
> not sure there's much make can do about it, other than try to set up a
> pty or something and redirect all process output to that... ouch.
>
> Maybe you can run your cron job inside of screen or some other program
> that mimics a terminal, so the programs you invoke are set to use line
> buffering?
I'll look into that.
thanks
Per Jessen, Zürich
- running parallel make jobs and avoiding jumbled/garbled output?, Per Jessen, 2008/02/21
- Re: running parallel make jobs and avoiding jumbled/garbled output?, Alexander Kriegisch, 2008/02/21
- Re: running parallel make jobs and avoiding jumbled/garbled output?, Eli Zaretskii, 2008/02/22
- Re: running parallel make jobs and avoiding jumbled/garbled output?, Paul Smith, 2008/02/22
- Re: running parallel make jobs and avoiding jumbled/garbled output?,
Per Jessen <=
- Re: running parallel make jobs and avoiding jumbled/garbled output?, Per Jessen, 2008/02/22
- Re: running parallel make jobs and avoiding jumbled/garbled output?, Paul Smith, 2008/02/22
- Re: running parallel make jobs and avoiding jumbled/garbled output?, David Boyce, 2008/02/22
- Re: running parallel make jobs and avoiding jumbled/garbled output?, Alexander Kriegisch, 2008/02/22
- Re: running parallel make jobs and avoiding jumbled/garbled output?, Per Jessen, 2008/02/22
- Re: running parallel make jobs and avoiding jumbled/garbled output?, Per Jessen, 2008/02/22
- Re: running parallel make jobs and avoiding jumbled/garbled output?, Per Jessen, 2008/02/22
Re: running parallel make jobs and avoiding jumbled/garbled output?, Per Jessen, 2008/02/27