bug#32943: closed (grep pattern < fifo fails on Cygwin (and MinGW), but not on Linux)

[GNU bug Tracking System]

Your message dated Wed, 1 Jan 2020 17:09:45 -0800
with message-id <address@hidden>
and subject line Re: bug#32943: grep pattern < fifo fails on Cygwin (and 
MinGW), but not on Linux
has caused the debbugs.gnu.org bug report #32943,
regarding grep pattern < fifo fails on Cygwin (and MinGW), but not on Linux
to be marked as done.

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-- 
32943: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=32943
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> --- Begin Message ---
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> Subject: 
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> grep pattern < fifo fails on Cygwin (and MinGW), but not on Linux
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> Date: 
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> Fri, 05 Oct 2018 12:02:47 +0200
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> User-agent: 
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> XS4ALL Webmail
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> Hi,
>
> Yes, I might not be following "procedure" (I do not know), but I decided
> to report this failure, because I canNOT ascertain whether "the list" is
> aware of this failure or not.
>
> grep fails on Cygwin (and apparently also on MinGW), as follows:
>
> @@ mkfifo fifo
> @@ echo X > fifo & grep . < fifo # X may be omitted
> [1] <some procid>
> grep: (standard input): Invalid argument
> [1]+  Done                    echo > fifo
>
> This failure does not occur on Linux.
>
> As far as I can tell, the maintainer of grep on Cygwin, hardly modifies
> the source code of grep. Therefore I surmise? that the original tarball
> must be in error.
>
> I applied strace to "grep . < fifo", and as far as I can tell "an lseek
> is applied to the fifo", which obviously fails.
>
> The "lseek" occurs on Cygwin (and MinGW?), but not on Linux (as far as
> I can tell, the code that is executed on Cygwin is not the same as the
> one that is executed on Linux).
>
> The failure does not occur if e.g. cut is substituted for grep.
>
> @@ mkfifo fifo
> @@ echo X > fifo & cut -f1 < fifo # X may be omitted
> No error ...
>
> Q: are you aware of this failure?
>
> Regards,
> Henri
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#32943: grep pattern < fifo fails on Cygwin (and MinGW), but not on Linux
>
>
>
>
> Date: 
>
> Wed, 1 Jan 2020 17:09:45 -0800
>
>
>
>
> User-agent: 
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> Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2
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>
>
>
> On 10/8/18 11:10 AM, Houder wrote:
> > We have to wait until Corinna Vinschen returns from holidays (end of
> > october), because Corinna Vinschen is the only one who can deal with
> > the executive.
>
> Corinna later pushed a patch for this Cygwin bug 
> <https://cygwin.com/ml/cygwin/2018-10/msg00087.html> so I'm closing this old 
> grep bug report.
>
>
> --- End Message ---