DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org EC8863858D28
Message-ID: <189fa51e-fada-4a5d-8208-a8f9c025bd64@towo.net>
Date: Mon, 10 Jun 2024 13:41:52 +0200
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Subject: Re: Bug: bash redirect "magic" variable content to input of command
 hangs (upstream of https://github.com/git-for-windows/git/issues/5001)
To: cygwin AT cygwin DOT com
References: <git-for-windows/git/issues/5001 AT github DOT com>
 <git-for-windows/git/issues/5001/2157897799 AT github DOT com>
 <trinity-3cedf922-0401-4736-a503-cfd5bb21f750-1718017964332 AT 3c-app-gmx-bs33>
Autocrypt: addr=towo AT towo DOT net; keydata=
 xsDNBGNaf3QBDACVevqudcTSevLThXKQPU1QpaDxtGuYjtwmr7i9wXxVGih4Y4oxOJN4PYlu
 KBX9IVAI4651dA+xYtXuyIkWOPZWyyzkGKavQOn3Q7dk09oj7bh2IwOndpxXXde337D408EQ
 bQEGbMHr9lOWhSAideowzgCeFIvGTf2AovbPh97HpexJn1/HCRiRAhTNlrkS1DByUgCAeEMK
 fEr6aGM/Ou29MT+eTnQwOIZTnl9Z9LxM2FtqqMH3MycC7I2OoW3XXhuL8BPQdyJUjWa0/J11
 Oo5jFkRXtWenIns6jGn18oW72jnDmo9jXwwS+iZWAV6Y51nhD7jSC+3xs9ORmPCdtHUSpTr1
 zh67UueUJ3DUUNVuA25Hn/9EJMJ2L60BGUEr88NEB6pcZhmcwdkurAQeYT6t+frzBz2ctsoN
 BoxP/Xc02yd+z7hXWRRMrJWh9WHlQHA3Z4FfmyNhyPhs3MgKTJ1E9QfzGquigAmF3/k/Dc1m
 7cSOKhGYhpEJdSpdXccJFKkAEQEAAc0cVGhvbWFzIFdvbGZmIDx0b3dvQHRvd28ubmV0PsLB
 BwQTAQgAMRYhBHUiRKsHn5d8BpWdP8bz0e72Bp0CBQJjWn93AhsDBAsJCAcFFQgJCgsFFgID
 AQAACgkQxvPR7vYGnQKSMAv8Di+8MXB2mcfsemRdShfLLKcLOv+d0CXAtPVaY3XKxbKpRvC9
 +AAT5wIHYjQft77/b2y87vGIh+nQ5hKLtNtQPSDtqG/Igkb5jAXpLi28fSUzgM96DvARmwve
 5wSnAU3prxH+Y63YpOpslEcGMRoEtYCDy1ANMYPcEZT/YvDd4CplyyEai4VYrw3/LsESDYlY
 GK6uMQzZ1jl2cNOUFu6BwLUeZIcwaqGto8n4R4nbf4jxUEpa21bWBPqE+Jf49uipjPr/iJ72
 5HbdWuuCfyTTJEJjfNEBigWP2RXM9iNDcO61V3aEjh76tThfBK2MMlLWfZkQaQziu24x8R4B
 I0efJYWBX2Sv2qnsH/EWj7FUIZjRqGG7LnWHLShfG6yjSOTOWYi8BbsvoftpaLWgZX28aGX4
 uzuSZ5L0caXh/pr/gSgqoH/YbuFIgqtQH4seOBgTybd22Vpe78rnc+8450pN8qwchHAZaJka
 UxS0SpYxXzXmHUKILA4C43s0U/z2Mez9zsDNBGNaf3cBDADeJ7paMrb6f1+k8wM7tyk0/Ded
 KX/pOejt/D20Ceerw2iL/4tUmBL+A3ic2yjiSFUSsEfHwgCVwKrn4MwZtkesdiphm2lk6xWc
 k1ENCQy44QwQT6UZ/mHWYWcj5LS6ua183x1zdn9iF3lv150nm/ssw56D7USz/ap1Vh0lf5te
 D+CIheGLocVDqxWiu7rHP8jKRWFgq/+OU6HKX8p2Yv1oYsykh9qF2bFzawLDS+S1VbfRicfD
 G0RtceL/BAf7b6UE5u9TGdfrFEa2TKZeS/FS/ViKUfwsXQIki1sWt2FQENbuDY28vxyR46ZZ
 0gixDCFUoBw5pkmOGVQa+1RQYrRqlN4X0CAgp7mFVeEHl5NTgiL1bemkQVmHOUDG+CzNg+Lk
 UGoedAtT672l3JjrnSs4j8zNshpgV2OfAhAC+V9XvqCjMnxzVfXkVlbuWpPfUWQeFclLGg8P
 agpQUE0Ux+VV4DoeQCxYEnRCf/n7n+IRfILj5+2l6Zw4M7zSu6ii0tUAEQEAAcLA9gQYAQgA
 IBYhBHUiRKsHn5d8BpWdP8bz0e72Bp0CBQJjWn97AhsMAAoJEMbz0e72Bp0CQr4L/REdT0SF
 mbapnZIe92THCdtAUgwEv8VdNiNFBJelz8P/fuXuNPtisYvQQD4e64zpWe2UC4Cxo9DUk/pW
 6Qci1xaXRKEiSPjHdSGGVB1PFIcqiS75GCf/ga/Dnfsy0Y4Uh6OGTQnkvZLBCe3vvcVLDQ7F
 PuV79zA9/eOeOW6aGoO6bq/wH+z96f9LyTITkQDy07fm6JYTGuzAoJE2AEboU1mgbtlx+tAa
 QFkpAQkp2g1Vhc3A7k4vntlHOrjMC+uVFh7QTGFfIlLRF6izUjSe6EZ06LErzlIiE05RP3yF
 FSRWidW0wze26peYlxYVgH1+T9wMTW2oiTBybfAMHBAxUP7Gr1WUo/oJEr0srWhatz8AwydP
 y7NwFbdpYn0NcFBaIlLW/JL11Eovwlivow+oGpzGFuuzSuflp2q9s2JWtn4EhW0kEs93D0LP
 iuJWvRaCZ6aD3uF3FMW8wyVWZYsLrzune2jH8w/uKMprDEOGOm+BcyhEFedTyY1ygbZKl+0G kQ==
In-Reply-To: <trinity-3cedf922-0401-4736-a503-cfd5bb21f750-1718017964332@3c-app-gmx-bs33>
UI-OutboundReport: notjunk:1;M01:P0:IhFn+ZoFoHU=;NgtMbswRGeiNCm+vMPfN09F0u7N
 O92+Lb2E6s8brqRz08dOEHkbF3FNtMxYFPQj4tc+KECBlGoNFq93OdQP1Mfazqt2jqh5i6eAJ
 ZQ35QFYsBuh9XRykXIBkw6TIkM4l9GGc6Qcr5uqLxBb8b7IBK4jnAmcQbECoBar2f9zz2aUNp
 jbOl0aLyWtEmx+Rk6eBTCmGiE2bVnCexaICqCgpz2tNUAFGlM3FROAFXPgSeuGdQL1risVS/I
 Lg25rfza/2A6cUeVLFVzhjHf7Ettmer7yBPba+6+BmmUvKWskTOtT6k8o5CxiBSGGWaDb7FlV
 fG+8DcQNJPiBhR88wGV3jFNRdPN+dLJE1KGkJUwIuWxvfCHUORmCD4bvHONysiKpbqzxZE0rG
 wNhhrjvMtqnQlKdhlcv+ou73WVUzqp7R1FLsYUdFseMfuKcffuyp06eUT57gGJ1deXFgRP3xU
 4b33QrmGOnrpDH7ibH96glEXJI6hRTzOs6Tj0TIwJ/3vfTjdscySidd7Uzn7mTCuSwgYhvn2j
 Pcjtwh2B8Djdtff1Zr9spms3Sk58DyrllXhcilH5bL+pVKPBv6jfHheVVPzYLL+GwDKjCyB31
 DoBZiPM4GuzIRZT9xN7ZEuBhAwZ9WxtjQ2Ko9vhXlKcmvQ/0/hNBajcra8UdXNST8fJQ1y6He
 84yhftWJ7LbI9HPZReB0b3XAOazOcd3kpg+P/pEDi8EaUaYC4uYoyd5P6RctYLNio1RNBo2WH
 A/maKOgFqLQQxFHm7TnNqkwNnNvLBZnmc1d31L/wYY1js32XvOjTlk=
Precedence: list
From: Thomas Wolff via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Thomas Wolff <towo AT towo DOT net>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Errors-To: cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com
Sender: "Cygwin" <cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com>
Content-Transfer-Encoding: 8bit


Am 10.06.2024 um 13:12 schrieb Holger Klene via Cygwin:
> Hi Cygwin,
>
> On reading a magic value back from a bash variable, the involved command (wc, grep, cat, ...) hangs indefinitely and has to be stopped by Ctrl+C
>
> Editing it's content by deleting lines, the "magic" goes away. Also as demonstrated, other text-files (even twice the size) work fine.
>
> See this bash session:
> ---
> holgerk AT BX-NB-015 /cygdrive/c/Users/holgerk
> $ wc -l magic.txt text.log
>    2074 magic.txt
>    4214 text.log
>    6288 insgesamt
>
> holgerk AT BX-NB-015 /cygdrive/c/Users/holgerk
> $ md5sum magic.txt text.log
> 8ee7af38464d80a716d18d44c0a22f22 *magic.txt
> 0211535797c8d2e6b363f7dde147949f *text.log
>
> holgerk AT BX-NB-015 /cygdrive/c/Users/holgerk
> $ cat magic.txt | wc -l
> 2074
>
> holgerk AT BX-NB-015 /cygdrive/c/Users/holgerk
> $ cat text.log | wc -l
> 4214
>
> holgerk AT BX-NB-015 /cygdrive/c/Users/holgerk
> $ declare ctrl=$(cat magic.txt) && printf '%s\n' "$ctrl" | wc -l
> 2074
>
> holgerk AT BX-NB-015 /cygdrive/c/Users/holgerk
> $ declare ctrl=$(cat text.log) && printf '%s\n' "$ctrl" | wc -l
> 4214
>
> holgerk AT BX-NB-015 /cygdrive/c/Users/holgerk
> $ declare ctrl=$(cat text.log) && wc -l <<< "$ctrl"
> 4214
>
> holgerk AT BX-NB-015 /cygdrive/c/Users/holgerk
> $ declare ctrl=$(cat magic.txt) && wc -l <<< "$ctrl"
> <CTRL+C>
>
> holgerk AT BX-NB-015 /cygdrive/c/Users/holgerk
> $ declare ctrl=$(cat magic.txt) && grep hallo <<< "$ctrl"
> <CTRL+C>
>
>
> holgerk AT BX-NB-015 /cygdrive/c/Users/holgerk
> $ declare ctrl=$(cat magic.txt) && cat <<< "$ctrl"
> <CTRL+C>
Works for me.

> ---
>
> This is:
> GNU bash, Version 5.2.21(1)-release (x86_64-pc-cygwin)
>
> Was also reproduced in git-bash 5.2.26(1)-release (also cygwin)
> but not in WSL-bash 5.1.16 (independent of cygwin)
>
>
> Thanks
> Holger
>
> PS: I reported this to git first:
>
>
> Gesendet: Montag, 10. Juni 2024 um 11:58 Uhr
> Von: "Johannes Schindelin" <notifications AT github DOT com>
> An: "git-for-windows/git" <git AT noreply DOT github DOT com>
> Cc: "Holger Klene" <h DOT klene AT gmx DOT de>, "Mention" <mention AT noreply DOT github DOT com>
> Betreff: Re: [git-for-windows/git] bash redirect "magic" variable content to input of command hangs (Issue #5001)
>
> I just verified that this is happening in regular https://cygwin.com/ which, in this ticket's context is an upstream project of Git for Windows, as we use a slightly modified version of the Cygwin runtime as POSIX emulation layer that allows Bash to work.
> @hklene[https://github.com/hklene] would you mind reporting it there[https://cygwin.com/problems.html]?
> —
> Reply to this email directly, view it on GitHub[https://github.com/git-for-windows/git/issues/5001#issuecomment-2157897799], or unsubscribe.
>


-- 
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple