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Re: tee logs no output if stdout is closed
From: |
Jim Meyering |
Subject: |
Re: tee logs no output if stdout is closed |
Date: |
Fri, 03 Oct 2008 14:31:55 +0200 |
Paolo Bonzini <address@hidden> wrote:
> Jim,
>
>> Imagine a scenario in which the pipe reader is expected always to
>> be reading, and so the pipe writer can expect that any write failure with
>> errno==EPIPE indicates the reader has terminated unexpectedly.
>
> If the writer should terminate first, the reader can still detect the
> failure using SIGPIPE and/or SIGCHLD. Since you say that you consider
The above was assuming that SIGPIPE is being ignored. My goal is for the
_writer_ to be able to detect write failure due to EPIPE (via gnulib's
close_* functions), even when there is no parent child relationship
between the reader and writer.
> ignoring the signal to be discouraged, these programs should not see
> EPIPE anyway. Yes, you also said:
>
>> Some environments (mis-configured login/csh) have
>> resulted in the default SIGPIPE handler being SIG_IGN.
>
> ... but there are so many other problems that could result from
> misconfiguration, such as fd 0/1/2 not being open. I don't think
I agree. we should not cater to misconfigured environments.
Just mentioning one context in which SIGPIPE should not be ignored.
- Re: tee logs no output if stdout is closed, (continued)
- Re: tee logs no output if stdout is closed, Jim Meyering, 2008/10/03
- Re: tee logs no output if stdout is closed, Bruno Haible, 2008/10/03
- Re: tee logs no output if stdout is closed, Jim Meyering, 2008/10/03
- Re: tee logs no output if stdout is closed, Bruno Haible, 2008/10/03
- Re: tee logs no output if stdout is closed, Jim Meyering, 2008/10/04
- Re: tee logs no output if stdout is closed, Bruno Haible, 2008/10/04
- Re: tee logs no output if stdout is closed, Jim Meyering, 2008/10/05
- Re: tee logs no output if stdout is closed, Bruno Haible, 2008/10/05
- Re: tee logs no output if stdout is closed, Jim Meyering, 2008/10/07
- Re: tee logs no output if stdout is closed, Paolo Bonzini, 2008/10/03
- Re: tee logs no output if stdout is closed,
Jim Meyering <=
- Re: tee logs no output if stdout is closed, Paolo Bonzini, 2008/10/03
- Re: tee logs no output if stdout is closed, Jim Meyering, 2008/10/03
- Re: tee logs no output if stdout is closed, Paolo Bonzini, 2008/10/03
- Re: tee logs no output if stdout is closed, Jim Meyering, 2008/10/03
- Re: tee logs no output if stdout is closed, Bruno Haible, 2008/10/03
- Re: tee logs no output if stdout is closed, Paolo Bonzini, 2008/10/03
- Re: tee logs no output if stdout is closed, Jim Meyering, 2008/10/03
Re: tee logs no output if stdout is closed, Bruno Haible, 2008/10/05