[debbugs-tracker] bug#23316: closed (gzip-1.7: gzip -l issue when piping)

[GNU bug Tracking System]

Your message dated Tue, 19 Apr 2016 17:49:35 -0700
with message-id <address@hidden>
and subject line Re: bug#23314: gzip-1.7-1 regression: cannot redirect output 
of gzip -l
has caused the debbugs.gnu.org bug report #23314,
regarding gzip-1.7: gzip -l issue when piping
to be marked as done.

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-- 
23314: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=23314
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> --- Begin Message ---
>
>
>
> Subject: 
>
> gzip-1.7: gzip -l issue when piping
>
>
>
>
> Date: 
>
> Tue, 19 Apr 2016 02:12:43 -0400
>
>
>
>
> User-agent: 
>
> Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.0
>
>
>
>
> Hi,
>
> There is a problem with gzip-1.7 when piping output with the 'list' 
> option. Specifically, both
>     gzip -l file.gz > output
> and
>     gzip -l file.gz | grep -q pattern ...
>
> produce
>
> gzip: write error: Bad file descriptor
>
> This issue is due to the following code (I assume to the close()):
>
> gzip-1.7/gzip.c:670
>
>  670     if (to_stdout
>  671         && ((synchronous
>  672              && (fdatasync (STDOUT_FILENO) != 0 && errno != EINVAL))
>  673             || close (STDOUT_FILENO) != 0)
>  674         && errno != EBADF)
>  675       write_error ();
>
> In the cases above, to_stdout=1, and synchronous=0.
>
> The issue appears to be 'list' specific, eg,
>
>     gzip -dc file.gz | grep -q pattern ...
>
> looks ok.
>
> Perhaps line 670 should be:
>
> 670     if (!list && to_stdout
>
> or, not set to_stdout in the list case ? Not sure..
>
> thanks,
> John
>
> Thanks,
> John
>
>
>
>
> --- End Message ---

--- Begin Message --- Subject: Re: bug#23314: gzip-1.7-1 regression: cannot redirect output of gzip -l Date: Tue, 19 Apr 2016 17:49:35 -0700 User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.7.1 Thanks for reporting the problem. I installed the attached gzip patch on savannah.

0001-gzip-fix-bug-with-l-output-to-pipes.patch
Description: Source code patch

--- End Message ---