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Subject: bug#62334: Network is unreachable only for recursive pypi import
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The following package import fails when importing the dependency, but
succeeds when directly importing that dependency. I can also manually
download the tar without issue.

--8<---------------cut here---------------start------------->8---
$ guix describe
Generation 38 Mar 21 2023 13:38:52 (current)
  guix 38b64d4
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: 38b64d47ed3dfaeb63b859e7a8834e477ffed3a1
--8<---------------cut here---------------end--------------->8---

--8<---------------cut here---------------start------------->8---
$ guix import pypi -r cdlib

Starting download of /tmp/guix-file.oeSQon
From https://files.pythonhosted.org/packages/eb/6d/97167dce848b65023a272e2f=
fd04b2e462612efdb3538d16e2b8b2221a15/cdlib-0.2.6.tar.gz...
 =E2=80=A6.6.tar.gz  191KiB                  41.0MiB/s 00:00 =E2=96=95=E2=
=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=
=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=
=E2=96=88=E2=96=8F 100.0%

Starting download of /tmp/guix-file.H0dsHq
From https://files.pythonhosted.org/packages/56/37/80bdc21fbb88d87bca352cdf=
1ea0b9e2492737dd5775f32a04ea242f842e/cdlib-0.2.6-py3-none-any.whl...
 =E2=80=A63-none-any.whl  223KiB             74.0MiB/s 00:00 =E2=96=95=E2=
=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=
=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=
=E2=96=88=E2=96=8F 100.0%

Starting download of /tmp/guix-file.xReGb4
From https://files.pythonhosted.org/packages/49/01/21337857631a97ab551bb2e3=
b5691ed6b1b9586011aa6a5355b9694a37fa/demon-2.0.6.tar.gz...
In procedure connect: Network is unreachable

Starting download of /tmp/guix-file.xReGb4
From https://web.archive.org/web/20230321140958/https://files.pythonhosted.=
org/packages/49/01/21337857631a97ab551bb2e3b5691ed6b1b9586011aa6a5355b9694a=
37fa/demon-2.0.6.tar.gz...
In procedure connect*: Connection timed out
Trying to use Disarchive to assemble /tmp/guix-file.xReGb4...
could not find its Disarchive specification
failed to download "/tmp/guix-file.xReGb4" from
"https://files.pythonhosted.org/packages/49/01/21337857631a97ab551bb2e3b569=
1ed6b1b9586011aa6a5355b9694a37fa/demon-2.0.6.tar.gz"
Backtrace:
          10 (primitive-load "/home/ec2-user/.config/guix/current/bi=E2=80=
=A6")
In guix/ui.scm:
   2300:7  9 (run-guix . _)
  2263:10  8 (run-guix-command _ . _)
In guix/scripts/import.scm:
    89:11  7 (guix-import . _)
In ice-9/boot-9.scm:
  1752:10  6 (with-exception-handler _ _ #:unwind? _ # _)
In guix/scripts/import/pypi.scm:
    97:21  5 (_)
In guix/import/utils.scm:
    638:3  4 (recursive-import _ #:repo->guix-package _ #:guix-name . #)
   600:31  3 (topological-sort _ #<procedure 7faf595b7270 at guix/i=E2=80=
=A6> =E2=80=A6)
In srfi/srfi-1.scm:
   586:17  2 (map1 (("demon" #f) ("nf1" #f) ("eva-lcd" #f) ("b=E2=80=A6" =
=E2=80=A6) =E2=80=A6))
In guix/import/utils.scm:
   630:33  1 (lookup-node "demon" #f)
In ice-9/boot-9.scm:
  1685:16  0 (raise-exception _ #:continuable? _)

ice-9/boot-9.scm:1685:16: In procedure raise-exception:
Wrong number of values returned to continuation (expected 2)
--8<---------------cut here---------------end--------------->8---

--8<---------------cut here---------------start------------->8---
$ guix import pypi demon

Starting download of /tmp/guix-file.MOR39A
From https://files.pythonhosted.org/packages/49/01/21337857631a97ab551bb2e3=
b5691ed6b1b9586011aa6a5355b9694a37fa/demon-2.0.6.tar.gz...
 =E2=80=A6.6.tar.gz  7KiB                    17.3MiB/s 00:00 =E2=96=95=E2=
=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=
=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=
=E2=96=88=E2=96=8F 100.0%

Starting download of /tmp/guix-file.RuwPtL
From https://files.pythonhosted.org/packages/96/85/5f9146e3f8d7324d8741cd3b=
ea9b99926d5ee75571b9610c661b1bbd06f5/demon-2.0.6-py3-none-any.whl...
 =E2=80=A63-none-any.whl  7KiB               17.6MiB/s 00:00 =E2=96=95=E2=
=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=
=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=
=E2=96=88=E2=96=8F 100.0%
(package
  (name "python-demon")
  (version "2.0.6")
  (source (origin
            (method url-fetch)
            (uri (pypi-uri "demon" version))
            (sha256
             (base32
              "0nd370yjfb3jirmxd0wa03c75dl7jac4xfsq1rvp5483mxddirb0"))))
  (build-system python-build-system)
  (propagated-inputs (list python-networkx python-tqdm))
  (home-page "https://github.com/GiulioRossetti/DEMON")
  (synopsis "Community Discovery algorithm")
  (description "Community Discovery algorithm")
  (license license:bsd-2))
--8<---------------cut here---------------end--------------->8---

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Greg Hogan <code@HIDDEN>
Subject: bug#62334: Acknowledgement (Network is unreachable only for
 recursive pypi import)
Message-ID: <handler.62334.B.167940826019844.ack <at> debbugs.gnu.org>
References: <CA+3U0ZmV+B3mqut5QVU55Bv_Y8q-dBf8fFekNZAYKra+vFT5GA@HIDDEN>
X-Gnu-PR-Message: ack 62334
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Date: Tue, 21 Mar 2023 14:18:02 +0000

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62334: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D62334
GNU Bug Tracking System
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Message sent to bug-guix@HIDDEN:

Subject: bug#62334: Network is unreachable only for recursive pypi import
Resent-From: Josselin Poiret <dev@HIDDEN>
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Date: Tue, 21 Mar 2023 22:45:12 +0100
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--=-=-=
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Hi Greg,

Greg Hogan <code@HIDDEN> writes:

> The following package import fails when importing the dependency, but
> succeeds when directly importing that dependency. I can also manually
> download the tar without issue.

I cannot reproduce on my side :( were you able to reproduce this
multiple times?  Can you still reproduce it now?

Best,
=2D-=20
Josselin Poiret

--=-=-=
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Message sent to bug-guix@HIDDEN:

Subject: bug#62334: Network is unreachable only for recursive pypi import
Resent-From: Maxim Cournoyer <maxim.cournoyer@HIDDEN>
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From: Maxim Cournoyer <maxim.cournoyer@HIDDEN>
References: <CA+3U0ZmV+B3mqut5QVU55Bv_Y8q-dBf8fFekNZAYKra+vFT5GA@HIDDEN>
 <87jzz9rd7b.fsf@HIDDEN>
Date: Fri, 24 Mar 2023 08:19:29 -0400
In-Reply-To: <87jzz9rd7b.fsf@HIDDEN> (Josselin Poiret's message of "Tue, 
 21 Mar 2023 22:45:12 +0100")
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Hi,

Josselin Poiret <dev@HIDDEN> writes:

> Hi Greg,
>
> Greg Hogan <code@HIDDEN> writes:
>
>> The following package import fails when importing the dependency, but
>> succeeds when directly importing that dependency. I can also manually
>> download the tar without issue.
>
> I cannot reproduce on my side :( were you able to reproduce this
> multiple times?  Can you still reproduce it now?
>
> Best,

I can't reproduce it either, so it seems a genuine network error on your
side.

What we should do though is catch it and report it nicely, instead of
crashing.

-- 
Thanks,
Maxim

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--0000000000000a2f0005f7fbd598
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Having the same issue.
As far as I can tell, it seems to happen for me when there are nested
recursions?
For example:  a depends on b, b depends on c
`guix import  pypi -r package-c` - works
`guix import  pypi -r package-b` - works, importing both b and c
`guix import  pypi -r package-a` - downloads a and b, but fails at c.

--0000000000000a2f0005f7fbd598
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<div dir=3D"ltr">Having the same issue.=C2=A0=C2=A0<div>As far as I can tel=
l, it seems to happen for me when there are nested recursions?</div><div>Fo=
r example:=C2=A0 a depends on b, b depends on c</div><div>`guix import=C2=
=A0 pypi -r package-c` - works</div><div>`guix import=C2=A0 pypi -r package=
-b` - works, importing both b and c<br></div><div>`guix import=C2=A0 pypi -=
r package-a` - downloads a and b, but fails at c.<br></div><div><br></div><=
div><br></div></div>

--0000000000000a2f0005f7fbd598--

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From: zimoun <zimon.toutoune@HIDDEN>
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 <87jzz9rd7b.fsf@HIDDEN> <87mt421gvi.fsf@HIDDEN>
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Hi,

On Fri, 24 Mar 2023 at 08:19, Maxim Cournoyer <maxim.cournoyer@HIDDEN> w=
rote:

> I can't reproduce it either, so it seems a genuine network error on your
> side.

As I report in #62765 [1], it seems a regression on our side:

        which passes with 29efa27.  And indeed, using 86d580c, =E2=80=9Cgui=
x import pypi
        num2words -r=E2=80=9D passes without any error, downloading from th=
e exact same
        URL. Hum?!

        Well, I do not know which change impacts this regression.

1: http://issues.guix.gnu.org/msgid/87ile2ihj4.fsf@HIDDEN


Cheers,
simon

PS: Well, I just merged 2 other issues reporting the same behaviour.

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From: Simon Tournier <zimon.toutoune@HIDDEN>
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Date: Tue, 25 Apr 2023 14:23:11 +0200
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Hi,

On Tue, 21 Mar 2023 at 10:17, Greg Hogan <code@HIDDEN> wrote:

> --8<---------------cut here---------------start------------->8---
> $ guix describe
> Generation 38 Mar 21 2023 13:38:52 (current)
>   guix 38b64d4
>     repository URL: https://git.savannah.gnu.org/git/guix.git
>     branch: master
>     commit: 38b64d47ed3dfaeb63b859e7a8834e477ffed3a1
> --8<---------------cut here---------------end--------------->8---

I can reproduce.

> --8<---------------cut here---------------start------------->8---
> $ guix import pypi -r cdlib

[...]

> Starting download of /tmp/guix-file.xReGb4
> From https://files.pythonhosted.org/packages/49/01/21337857631a97ab551bb2=
e3b5691ed6b1b9586011aa6a5355b9694a37fa/demon-2.0.6.tar.gz...
> In procedure connect: Network is unreachable
>
> Starting download of /tmp/guix-file.xReGb4
> From https://web.archive.org/web/20230321140958/https://files.pythonhoste=
d.org/packages/49/01/21337857631a97ab551bb2e3b5691ed6b1b9586011aa6a5355b969=
4a37fa/demon-2.0.6.tar.gz...
> In procedure connect*: Connection timed out

[...]

>    586:17  2 (map1 (("demon" #f) ("nf1" #f) ("eva-lcd" #f) ("b=E2=80=A6" =
=E2=80=A6) =E2=80=A6))
> In guix/import/utils.scm:
>    630:33  1 (lookup-node "demon" #f)
> In ice-9/boot-9.scm:
>   1685:16  0 (raise-exception _ #:continuable? _)
>
> ice-9/boot-9.scm:1685:16: In procedure raise-exception:
> Wrong number of values returned to continuation (expected 2)
> --8<---------------cut here---------------end--------------->8---

Well, tracking the origin of the failure =E2=80=9CIn procedure connect*:
Connection timed out=E2=80=9D, it comes from =E2=80=99open-socket-for-uri=
=E2=80=99, see (guix
build download).

Using the diff below, for some mysterious reasons, =E2=80=99connect*=E2=80=
=99 throws the
error:

--8<---------------cut here---------------start------------->8---
$ ./pre-inst-env guix import pypi -r cdlib
[...]
Starting download of /tmp/guix-file.Ujg3KY
From https://files.pythonhosted.org/packages/49/01/21337857631a97ab551bb2e3=
b5691ed6b1b9586011aa6a5355b9694a37fa/demon-2.0.6.tar.gz...

;;; (uri "https://files.pythonhosted.org/packages/49/01/21337857631a97ab551=
bb2e3b5691ed6b1b9586011aa6a5355b9694a37fa/demon-2.0.6.tar.gz")

;;; (before #<input-output: socket 14> #(2 2454407487 443) 10)

;;; (failed #<input-output: socket 14>)

;;; (closed)

;;; (uri "https://files.pythonhosted.org/packages/49/01/21337857631a97ab551=
bb2e3b5691ed6b1b9586011aa6a5355b9694a37fa/demon-2.0.6.tar.gz")

;;; (before #<input-output: socket 14> #(10 5584993226756557710076326936930=
4187673 443 0 0) 10)

;;; (failed #<input-output: socket 14>)

;;; (closed)

;;; (boum)
In procedure connect: Network is unreachable
--8<---------------cut here---------------end--------------->8---

and note it is an issue on our side:

--8<---------------cut here---------------start------------->8---
$ ./pre-inst-env guix import pypi -r demon
;;; (uri "https://pypi.org/pypi/demon/json")

;;; (before #<input-output: socket 13> #(2 2539978975 443) #f)

;;; (connect* #t)

;;; (done)

Starting download of /tmp/guix-file.G5r627
From https://files.pythonhosted.org/packages/49/01/21337857631a97ab551bb2e3=
b5691ed6b1b9586011aa6a5355b9694a37fa/demon-2.0.6.tar.gz...

;;; (uri "https://files.pythonhosted.org/packages/49/01/21337857631a97ab551=
bb2e3b5691ed6b1b9586011aa6a5355b9694a37fa/demon-2.0.6.tar.gz")

;;; (before #<input-output: socket 14> #(2 2454407487 443) 10)

;;; (connect* #<unspecified>)

;;; (done)
 =E2=80=A6.6.tar.gz  7KiB                     4.2MiB/s 00:00 =E2=96=95=E2=
=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=
=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=
=E2=96=88=E2=96=8F 100.0%

Starting download of /tmp/guix-file.4L0Phu
From https://files.pythonhosted.org/packages/96/85/5f9146e3f8d7324d8741cd3b=
ea9b99926d5ee75571b9610c661b1bbd06f5/demon-2.0.6-py3-none-any.whl...

;;; (uri "https://files.pythonhosted.org/packages/96/85/5f9146e3f8d7324d874=
1cd3bea9b99926d5ee75571b9610c661b1bbd06f5/demon-2.0.6-py3-none-any.whl")

;;; (before #<input-output: socket 15> #(2 2454407487 443) 10)

;;; (connect* #<unspecified>)

;;; (done)
 =E2=80=A63-none-any.whl  7KiB                5.5MiB/s 00:00 =E2=96=95=E2=
=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=
=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=
=E2=96=88=E2=96=8F 100.0%
(define-public python-demon
  (package
    (name "python-demon")
    (version "2.0.6")
    (source (origin
              (method url-fetch)
              (uri (pypi-uri "demon" version))
              (sha256
               (base32
                "0nd370yjfb3jirmxd0wa03c75dl7jac4xfsq1rvp5483mxddirb0"))))
    (build-system python-build-system)
    (propagated-inputs (list python-networkx python-tqdm))
    (home-page "https://github.com/GiulioRossetti/DEMON")
    (synopsis "Community Discovery algorithm")
    (description "Community Discovery algorithm")
    (license license:bsd-2)))
--8<---------------cut here---------------end--------------->8---


Maybe, it is a regression from some recent updates of Guile?

I do not know=E2=80=A6  Any idea?


Cheers,
simon

Message sent to bug-guix@HIDDEN:

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 Thu, 27 Apr 2023 06:32:26 -0700 (PDT)
From: Simon Tournier <zimon.toutoune@HIDDEN>
In-Reply-To: <86ildkb174.fsf@HIDDEN>
References: <CA+3U0ZmV+B3mqut5QVU55Bv_Y8q-dBf8fFekNZAYKra+vFT5GA@HIDDEN>
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--=-=-=
Content-Type: text/plain

Hi,

On mar., 25 avril 2023 at 14:23, Simon Tournier <zimon.toutoune@HIDDEN> wrote:

> Using the diff below,


--=-=-=
Content-Type: text/x-diff
Content-Disposition: inline; filename=p.patch
Content-Description: p.patch

diff --git a/guix/build/download.scm b/guix/build/download.scm
index db0a39084b..2eee984b31 100644
--- a/guix/build/download.scm
+++ b/guix/build/download.scm
@@ -409,18 +409,24 @@ (define addresses
                  (socket (addrinfo:fam ai) SOCK_STREAM IPPROTO_IP))))
       (catch 'system-error
         (lambda ()
-          (connect* s (addrinfo:addr ai) timeout)
-
+          (pk 'uri (uri->string uri))
+          (pk 'before s (addrinfo:addr ai) timeout)
+          (pk 'connect* (connect* s (addrinfo:addr ai) timeout))
+          (pk 'done)
           ;; Buffer input and output on this port.
           (setvbuf s 'block)
           ;; If we're using a proxy, make a note of that.
           (when http-proxy (set-http-proxy-port?! s #t))
           s)
         (lambda args
+          (pk 'failed s)
           ;; Connection failed, so try one of the other addresses.
           (close s)
+          (pk 'closed)
           (if (null? (cdr addresses))
-              (apply throw args)
+              (begin
+                (pk 'boum)
+                (apply throw args))
               (loop (cdr addresses))))))))
 
 (define (setup-http-tunnel port uri)
@@ -465,6 +471,7 @@ (define https-proxy (let ((proxy (getenv "https_proxy")))
                          (parameterize ((current-http-proxy https-proxy))
                            (thunk))
                          (thunk)))))))
+
     (with-https-proxy
      (let ((s (open-socket-for-uri uri #:timeout timeout)))
        ;; Buffer input and output on this port.

--=-=-=
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable



>                       for some mysterious reasons, =E2=80=99connect*=E2=
=80=99 throws the
> error:
>
> --8<---------------cut here---------------start------------->8---
> $ ./pre-inst-env guix import pypi -r cdlib
> [...]
> Starting download of /tmp/guix-file.Ujg3KY
> From https://files.pythonhosted.org/packages/49/01/21337857631a97ab551bb2=
e3b5691ed6b1b9586011aa6a5355b9694a37fa/demon-2.0.6.tar.gz...
>
> ;;; (uri "https://files.pythonhosted.org/packages/49/01/21337857631a97ab5=
51bb2e3b5691ed6b1b9586011aa6a5355b9694a37fa/demon-2.0.6.tar.gz")
>
> ;;; (before #<input-output: socket 14> #(2 2454407487 443) 10)
>
> ;;; (failed #<input-output: socket 14>)
>
> ;;; (closed)
>
> ;;; (uri "https://files.pythonhosted.org/packages/49/01/21337857631a97ab5=
51bb2e3b5691ed6b1b9586011aa6a5355b9694a37fa/demon-2.0.6.tar.gz")
>
> ;;; (before #<input-output: socket 14> #(10 55849932267565577100763269369=
304187673 443 0 0) 10)
>
> ;;; (failed #<input-output: socket 14>)
>
> ;;; (closed)
>
> ;;; (boum)
> In procedure connect: Network is unreachable
> --8<---------------cut here---------------end--------------->8---
>
> and note it is an issue on our side:
>
> --8<---------------cut here---------------start------------->8---
> $ ./pre-inst-env guix import pypi -r demon
> ;;; (uri "https://pypi.org/pypi/demon/json")
>
> ;;; (before #<input-output: socket 13> #(2 2539978975 443) #f)
>
> ;;; (connect* #t)
>
> ;;; (done)
>
> Starting download of /tmp/guix-file.G5r627
> From https://files.pythonhosted.org/packages/49/01/21337857631a97ab551bb2=
e3b5691ed6b1b9586011aa6a5355b9694a37fa/demon-2.0.6.tar.gz...
>
> ;;; (uri "https://files.pythonhosted.org/packages/49/01/21337857631a97ab5=
51bb2e3b5691ed6b1b9586011aa6a5355b9694a37fa/demon-2.0.6.tar.gz")
>
> ;;; (before #<input-output: socket 14> #(2 2454407487 443) 10)
>
> ;;; (connect* #<unspecified>)
>
> ;;; (done)
>  =E2=80=A6.6.tar.gz  7KiB                     4.2MiB/s 00:00 =E2=96=95=E2=
=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=
=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=
=E2=96=88=E2=96=8F 100.0%
>
> Starting download of /tmp/guix-file.4L0Phu
> From https://files.pythonhosted.org/packages/96/85/5f9146e3f8d7324d8741cd=
3bea9b99926d5ee75571b9610c661b1bbd06f5/demon-2.0.6-py3-none-any.whl...
>
> ;;; (uri "https://files.pythonhosted.org/packages/96/85/5f9146e3f8d7324d8=
741cd3bea9b99926d5ee75571b9610c661b1bbd06f5/demon-2.0.6-py3-none-any.whl")
>
> ;;; (before #<input-output: socket 15> #(2 2454407487 443) 10)
>
> ;;; (connect* #<unspecified>)
>
> ;;; (done)
>  =E2=80=A63-none-any.whl  7KiB                5.5MiB/s 00:00 =E2=96=95=E2=
=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=
=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=E2=96=88=
=E2=96=88=E2=96=8F 100.0%
> (define-public python-demon
>   (package
>     (name "python-demon")
>     (version "2.0.6")
>     (source (origin
>               (method url-fetch)
>               (uri (pypi-uri "demon" version))
>               (sha256
>                (base32
>                 "0nd370yjfb3jirmxd0wa03c75dl7jac4xfsq1rvp5483mxddirb0"))))
>     (build-system python-build-system)
>     (propagated-inputs (list python-networkx python-tqdm))
>     (home-page "https://github.com/GiulioRossetti/DEMON")
>     (synopsis "Community Discovery algorithm")
>     (description "Community Discovery algorithm")
>     (license license:bsd-2)))
> --8<---------------cut here---------------end--------------->8---
>
>
> Maybe, it is a regression from some recent updates of Guile?

Anyone else is able to reproduce the same error?

Cheers,
simon

--=-=-=--

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 (Greg Hogan's message of "Tue, 21 Mar 2023 10:17:22 -0400")
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Hello!

Greg Hogan <code@HIDDEN> skribis:

> Starting download of /tmp/guix-file.xReGb4
>>From https://web.archive.org/web/20230321140958/https://files.pythonhoste=
d.org/packages/49/01/21337857631a97ab551bb2e3b5691ed6b1b9586011aa6a5355b969=
4a37fa/demon-2.0.6.tar.gz...
> In procedure connect*: Connection timed out

I can very much reproduce the bug with =E2=80=9Cguix import pypi -r cdlib=
=E2=80=9D on
39ba8a10971f15264966823e8696d63c2995df86 and thereabouts.  Turns out
it=E2=80=99s a fun story!  (Josselin, I=E2=80=99m sure you=E2=80=99ll love =
it.)

First, the person who wrote =E2=80=98connect*=E2=80=99 *cough* hadn=E2=80=
=99t carefully read the
Guile manual, which reads (info "(guile) Ports and File Descriptors"):

  Note that =E2=80=98select=E2=80=99 may return early for other reasons, fo=
r example due
  to pending interrupts.

Clearly, =E2=80=98select=E2=80=99 is returning early, so we should check th=
at and loop.
So far, so good.

Now, why is =E2=80=98select=E2=80=99 returning immediately?  Because the un=
derlying
select(2) call is passed an extra file descriptor, the =E2=80=9Csleep pipe=
=E2=80=9D, as
you can see in =E2=80=98scm_std_select=E2=80=99 in libguile, and it=E2=80=
=99s that file
descriptor, number 3, that=E2=80=99s active at each select(2) call:

--8<---------------cut here---------------start------------->8---
28825 23:06:04 pselect6(15, [3], [14], [14], {tv_sec=3D10, tv_nsec=3D0}, NU=
LL) =3D 1 (in [3], left {tv_sec=3D9, tv_nsec=3D999991063}) <0.000079>
28825 23:06:04 read(3, "A", 1)          =3D 1 <0.000044>
--8<---------------cut here---------------end--------------->8---

Why so much activity on that =E2=80=9Csleep pipe=E2=80=9D, you ask?  Well, =
once we=E2=80=99ve
filtered the read(3, =E2=80=A6) calls, a pattern appears:

--8<---------------cut here---------------start------------->8---
  14335:28825 23:06:04 read(3, "A", 1)          =3D 1 <0.000044>
  14344:28825 23:06:04 read(3, "r", 1)          =3D 1 <0.000121>
  14353:28825 23:06:04 read(3, "c", 1)          =3D 1 <0.000107>
  14362:28825 23:06:04 read(3, "h", 1)          =3D 1 <0.000040>
  14436:28825 23:06:04 read(3, "i", 1)          =3D 1 <0.000049>
  14445:28825 23:06:04 read(3, "v", 1)          =3D 1 <0.000029>
  14454:28825 23:06:04 read(3, "e", 1)          =3D 1 <0.000019>
  14463:28825 23:06:04 read(3, ":", 1)          =3D 1 <0.000017>
  14472:28825 23:06:04 read(3, " ", 1)          =3D 1 <0.000019>
  14481:28825 23:06:04 read(3, " ", 1)          =3D 1 <0.000020>
  14490:28825 23:06:04 read(3, "/", 1)          =3D 1 <0.000019>
  14499:28825 23:06:04 read(3, "t", 1)          =3D 1 <0.000015>
  14508:28825 23:06:04 read(3, "m", 1)          =3D 1 <0.000018>
  15001:28825 23:06:04 read(3, "p", 1)          =3D 1 <0.000015>
  15010:28825 23:06:04 read(3, "/", 1)          =3D 1 <0.000016>
  15019:28825 23:06:04 read(3, "g", 1)          =3D 1 <0.000016>
  15028:28825 23:06:04 read(3, "u", 1)          =3D 1 <0.000015>
  15037:28825 23:06:04 read(3, "i", 1)          =3D 1 <0.000015>
  15046:28825 23:06:04 read(3, "x", 1)          =3D 1 <0.000015>
  15055:28825 23:06:04 read(3, "-", 1)          =3D 1 <0.000015>
--8<---------------cut here---------------end--------------->8---

See?  Who=E2=80=99s chatting over our sleep pipe?

--8<---------------cut here---------------start------------->8---
   4806:28831 23:06:03 dup2(0, 3)               =3D 3 <0.000011>
   4807:28831 23:06:03 dup2(3, 0)               =3D 0 <0.000011>
   4808:28831 23:06:03 dup2(4, 1)               =3D 1 <0.000012>
   4809:28831 23:06:03 dup2(5, 2)               =3D 2 <0.000010>
   4810:28831 23:06:03 close(3)                 =3D 0 <0.000010>
   4811:28831 23:06:03 close(4)                 =3D 0 <0.000011>
   4812:28831 23:06:03 close(5)                 =3D 0 <0.000010>
   4813:28831 23:06:03 close(6)                 =3D 0 <0.000010>
   4814:28831 23:06:03 close(7)                 =3D 0 <0.000010>
   4815:28831 23:06:03 close(8)                 =3D 0 <0.000011>
   4816:28831 23:06:03 close(9)                 =3D 0 <0.000010>
   4817:28831 23:06:03 close(10)                =3D 0 <0.000010>
   4818:28831 23:06:03 close(11)                =3D 0 <0.000011>
   4819:28831 23:06:03 close(12)                =3D 0 <0.000010>
   4820:28831 23:06:03 close(13)                =3D 0 <0.000010>
   4821:28831 23:06:03 close(14)                =3D 0 <0.000011>
   4822:28831 23:06:03 close(15)                =3D -1 EBADF (Bad file desc=
riptor) <0.000011>
   4823:28831 23:06:03 prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=3D1024, =
rlim_max=3D4*1024}) =3D 0 <0.000011>
   4824:28831 23:06:03 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) =3D 0 <0.00=
0010>
   4825:28831 23:06:03 execve("/home/ludo/src/guix/scripts/unzip", ["unzip"=
, "/tmp/guix-file.bmholm", "-d", "/tmp/guix-directory.Ok2DAA", "cdlib-0.2.6=
.dist-info/METADATA"], 0x18a7db0 /* 85 v
   [=E2=80=A6]
   4938:28831 23:06:03 write(1, "Archive:  /tmp/guix-file.bmholm\n", 32) =
=3D 32 <0.000018>
--8<---------------cut here---------------end--------------->8---

=E2=80=98unzip=E2=80=99!  And all its friends invoked from (guix import pyp=
i):

--8<---------------cut here---------------start------------->8---
        (call-with-temporary-directory
         (lambda (dir)
           (parameterize ((current-error-port (%make-void-port "rw+"))
                          (current-output-port (%make-void-port "rw+")))
             (if (string=3D? "zip" (file-extension source-url))
                 (invoke "unzip" archive "-d" dir)
                 (invoke "tar" "xf" archive "-C" dir)))
           =E2=80=A6))
--8<---------------cut here---------------end--------------->8---

Looks like we shoudn=E2=80=99t dup(4, 1) in the child process, because 4 is=
 the
other end of our sleep pipe.  :-)

The problem exists both in 3.0.9 and Guile =E2=80=98main=E2=80=99.  Looks r=
elated to the
file descriptor shuffling code in =E2=80=98do_spawn=E2=80=99.  WDYT, Jossel=
in?

Ludo=E2=80=99.

Message sent to bug-guix@HIDDEN:

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Subject: bug#62334: bug#63024: Crash during `guix import pypi -r'
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Hello!

Greg Hogan <code@HIDDEN> skribis:

> Starting download of /tmp/guix-file.xReGb4
>>From https://web.archive.org/web/20230321140958/https://files.pythonhoste=
d.org/packages/49/01/21337857631a97ab551bb2e3b5691ed6b1b9586011aa6a5355b969=
4a37fa/demon-2.0.6.tar.gz...
> In procedure connect*: Connection timed out

I can very much reproduce the bug with =E2=80=9Cguix import pypi -r cdlib=
=E2=80=9D on
39ba8a10971f15264966823e8696d63c2995df86 and thereabouts.  Turns out
it=E2=80=99s a fun story!  (Josselin, I=E2=80=99m sure you=E2=80=99ll love =
it.)

First, the person who wrote =E2=80=98connect*=E2=80=99 *cough* hadn=E2=80=
=99t carefully read the
Guile manual, which reads (info "(guile) Ports and File Descriptors"):

  Note that =E2=80=98select=E2=80=99 may return early for other reasons, fo=
r example due
  to pending interrupts.

Clearly, =E2=80=98select=E2=80=99 is returning early, so we should check th=
at and loop.
So far, so good.

Now, why is =E2=80=98select=E2=80=99 returning immediately?  Because the un=
derlying
select(2) call is passed an extra file descriptor, the =E2=80=9Csleep pipe=
=E2=80=9D, as
you can see in =E2=80=98scm_std_select=E2=80=99 in libguile, and it=E2=80=
=99s that file
descriptor, number 3, that=E2=80=99s active at each select(2) call:

--8<---------------cut here---------------start------------->8---
28825 23:06:04 pselect6(15, [3], [14], [14], {tv_sec=3D10, tv_nsec=3D0}, NU=
LL) =3D 1 (in [3], left {tv_sec=3D9, tv_nsec=3D999991063}) <0.000079>
28825 23:06:04 read(3, "A", 1)          =3D 1 <0.000044>
--8<---------------cut here---------------end--------------->8---

Why so much activity on that =E2=80=9Csleep pipe=E2=80=9D, you ask?  Well, =
once we=E2=80=99ve
filtered the read(3, =E2=80=A6) calls, a pattern appears:

--8<---------------cut here---------------start------------->8---
  14335:28825 23:06:04 read(3, "A", 1)          =3D 1 <0.000044>
  14344:28825 23:06:04 read(3, "r", 1)          =3D 1 <0.000121>
  14353:28825 23:06:04 read(3, "c", 1)          =3D 1 <0.000107>
  14362:28825 23:06:04 read(3, "h", 1)          =3D 1 <0.000040>
  14436:28825 23:06:04 read(3, "i", 1)          =3D 1 <0.000049>
  14445:28825 23:06:04 read(3, "v", 1)          =3D 1 <0.000029>
  14454:28825 23:06:04 read(3, "e", 1)          =3D 1 <0.000019>
  14463:28825 23:06:04 read(3, ":", 1)          =3D 1 <0.000017>
  14472:28825 23:06:04 read(3, " ", 1)          =3D 1 <0.000019>
  14481:28825 23:06:04 read(3, " ", 1)          =3D 1 <0.000020>
  14490:28825 23:06:04 read(3, "/", 1)          =3D 1 <0.000019>
  14499:28825 23:06:04 read(3, "t", 1)          =3D 1 <0.000015>
  14508:28825 23:06:04 read(3, "m", 1)          =3D 1 <0.000018>
  15001:28825 23:06:04 read(3, "p", 1)          =3D 1 <0.000015>
  15010:28825 23:06:04 read(3, "/", 1)          =3D 1 <0.000016>
  15019:28825 23:06:04 read(3, "g", 1)          =3D 1 <0.000016>
  15028:28825 23:06:04 read(3, "u", 1)          =3D 1 <0.000015>
  15037:28825 23:06:04 read(3, "i", 1)          =3D 1 <0.000015>
  15046:28825 23:06:04 read(3, "x", 1)          =3D 1 <0.000015>
  15055:28825 23:06:04 read(3, "-", 1)          =3D 1 <0.000015>
--8<---------------cut here---------------end--------------->8---

See?  Who=E2=80=99s chatting over our sleep pipe?

--8<---------------cut here---------------start------------->8---
   4806:28831 23:06:03 dup2(0, 3)               =3D 3 <0.000011>
   4807:28831 23:06:03 dup2(3, 0)               =3D 0 <0.000011>
   4808:28831 23:06:03 dup2(4, 1)               =3D 1 <0.000012>
   4809:28831 23:06:03 dup2(5, 2)               =3D 2 <0.000010>
   4810:28831 23:06:03 close(3)                 =3D 0 <0.000010>
   4811:28831 23:06:03 close(4)                 =3D 0 <0.000011>
   4812:28831 23:06:03 close(5)                 =3D 0 <0.000010>
   4813:28831 23:06:03 close(6)                 =3D 0 <0.000010>
   4814:28831 23:06:03 close(7)                 =3D 0 <0.000010>
   4815:28831 23:06:03 close(8)                 =3D 0 <0.000011>
   4816:28831 23:06:03 close(9)                 =3D 0 <0.000010>
   4817:28831 23:06:03 close(10)                =3D 0 <0.000010>
   4818:28831 23:06:03 close(11)                =3D 0 <0.000011>
   4819:28831 23:06:03 close(12)                =3D 0 <0.000010>
   4820:28831 23:06:03 close(13)                =3D 0 <0.000010>
   4821:28831 23:06:03 close(14)                =3D 0 <0.000011>
   4822:28831 23:06:03 close(15)                =3D -1 EBADF (Bad file desc=
riptor) <0.000011>
   4823:28831 23:06:03 prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=3D1024, =
rlim_max=3D4*1024}) =3D 0 <0.000011>
   4824:28831 23:06:03 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) =3D 0 <0.00=
0010>
   4825:28831 23:06:03 execve("/home/ludo/src/guix/scripts/unzip", ["unzip"=
, "/tmp/guix-file.bmholm", "-d", "/tmp/guix-directory.Ok2DAA", "cdlib-0.2.6=
.dist-info/METADATA"], 0x18a7db0 /* 85 v
   [=E2=80=A6]
   4938:28831 23:06:03 write(1, "Archive:  /tmp/guix-file.bmholm\n", 32) =
=3D 32 <0.000018>
--8<---------------cut here---------------end--------------->8---

=E2=80=98unzip=E2=80=99!  And all its friends invoked from (guix import pyp=
i):

--8<---------------cut here---------------start------------->8---
        (call-with-temporary-directory
         (lambda (dir)
           (parameterize ((current-error-port (%make-void-port "rw+"))
                          (current-output-port (%make-void-port "rw+")))
             (if (string=3D? "zip" (file-extension source-url))
                 (invoke "unzip" archive "-d" dir)
                 (invoke "tar" "xf" archive "-C" dir)))
           =E2=80=A6))
--8<---------------cut here---------------end--------------->8---

Looks like we shoudn=E2=80=99t dup(4, 1) in the child process, because 4 is=
 the
other end of our sleep pipe.  :-)

The problem exists both in 3.0.9 and Guile =E2=80=98main=E2=80=99.  Looks r=
elated to the
file descriptor shuffling code in =E2=80=98do_spawn=E2=80=99.  WDYT, Jossel=
in?

Ludo=E2=80=99.

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severity 63024 important
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retitle 63024 Guile's "sleep pipe" can leak into processes created by 'spawn'
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--=-=-=
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable

Hey,

Ludovic Court=C3=A8s <ludo@HIDDEN> skribis:

> Looks like we shoudn=E2=80=99t dup(4, 1) in the child process, because 4 =
is the
> other end of our sleep pipe.  :-)

How about this patch, Josselin?

Ludo=E2=80=99.


--=-=-=
Content-Type: text/x-patch
Content-Disposition: inline

diff --git a/libguile/posix.c b/libguile/posix.c
index 3adc743c4..2d55d985c 100644
--- a/libguile/posix.c
+++ b/libguile/posix.c
@@ -1388,11 +1388,27 @@ do_spawn (char *exec_file, char **exec_argv, char **exec_env,
     }
 
   /* Move the fds out of the way, so that duplicate fds or fds equal
-     to 0, 1, 2 don't trample each other */
+     to 0, 1, 2 don't trample each other.  Since 'system*' might give
+     us -1 for IN, OUT, or ERR, open /dev/null when that's the case.  */
+
+  if (in < 0)
+    posix_spawn_file_actions_addopen (&actions, fd_slot[0],
+                                      "/dev/null", O_RDONLY | O_CLOEXEC, 0);
+  else
+    posix_spawn_file_actions_adddup2 (&actions, in, fd_slot[0]);
+
+  if (out < 0)
+    posix_spawn_file_actions_addopen (&actions, fd_slot[1],
+                                      "/dev/null", O_WRONLY | O_CLOEXEC, 0);
+  else
+    posix_spawn_file_actions_adddup2 (&actions, out, fd_slot[1]);
+
+  if (err < 0)
+    posix_spawn_file_actions_addopen (&actions, fd_slot[2],
+                                      "/dev/null", O_WRONLY | O_CLOEXEC, 0);
+  else
+    posix_spawn_file_actions_adddup2 (&actions, err, fd_slot[2]);
 
-  posix_spawn_file_actions_adddup2 (&actions, in, fd_slot[0]);
-  posix_spawn_file_actions_adddup2 (&actions, out, fd_slot[1]);
-  posix_spawn_file_actions_adddup2 (&actions, err, fd_slot[2]);
   posix_spawn_file_actions_adddup2 (&actions, fd_slot[0], 0);
   posix_spawn_file_actions_adddup2 (&actions, fd_slot[1], 1);
   posix_spawn_file_actions_adddup2 (&actions, fd_slot[2], 2);
diff --git a/test-suite/tests/posix.test b/test-suite/tests/posix.test
index d5cf47cda..18dad8902 100644
--- a/test-suite/tests/posix.test
+++ b/test-suite/tests/posix.test
@@ -374,7 +374,17 @@
                     (system* "sh" "-c" "echo bong >&2"))))))))
 
       (and (zero? (status:exit-val status))
-           (call-with-input-file file get-string-all)))))
+           (call-with-input-file file get-string-all))))
+
+  (pass-if-equal "https://bugs.gnu.org/63024"
+      0
+    (if (file-exists? "/proc/self/fd/0")          ;on GNU/Linux?
+        (parameterize ((current-output-port (%make-void-port "w0")))
+          (system* "guile" "-c"
+                   (object->string
+                    '(exit (string=? "/dev/null"
+                                     (readlink "/proc/self/fd/1"))))))
+        (throw 'unresolved))))
 
 ;;
 ;; spawn

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 Content preview:  Hi Ludo, On Wed, 03 May 2023 at 11:04, Ludovic =?UTF-8?Q?Court=C3=A8s?= wrote:
    > diff --git a/libguile/posix.c b/libguile/posix.c > index 3adc743c4..2d55d985c
    100644 > --- a/libguile/posix.c > +++ b/libguile/posix.c 
 
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Hi Ludo,

On Wed, 03 May 2023 at 11:04, Ludovic Court=C3=A8s <ludo@HIDDEN> wrote:

> diff --git a/libguile/posix.c b/libguile/posix.c
> index 3adc743c4..2d55d985c 100644
> --- a/libguile/posix.c
> +++ b/libguile/posix.c

Does it mean patch the current Guile or a new release of Guile?


Cheers,
simon

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Hi,

Simon Tournier <zimon.toutoune@HIDDEN> skribis:

> On Wed, 03 May 2023 at 11:04, Ludovic Court=C3=A8s <ludo@HIDDEN> wrote:
>
>> diff --git a/libguile/posix.c b/libguile/posix.c
>> index 3adc743c4..2d55d985c 100644
>> --- a/libguile/posix.c
>> +++ b/libguile/posix.c
>
> Does it mean patch the current Guile or a new release of Guile?

It=E2=80=99s a patch against Guile =E2=80=98main=E2=80=99.  That gives an i=
ncentive to push a
new Guile release.

Ludo=E2=80=99.

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Ludovic Court=C3=A8s <ludo@HIDDEN> skribis:

> First, the person who wrote =E2=80=98connect*=E2=80=99 *cough* hadn=E2=80=
=99t carefully read the
> Guile manual, which reads (info "(guile) Ports and File Descriptors"):
>
>   Note that =E2=80=98select=E2=80=99 may return early for other reasons, =
for example due
>   to pending interrupts.
>
> Clearly, =E2=80=98select=E2=80=99 is returning early, so we should check =
that and loop.

Pushed a fix for that in fc6c96c88a0e4ad0b9e48272e5f97ffaa6eec36e.

Ludo=E2=80=99.

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Ludovic Court=C3=A8s <ludo@HIDDEN> skribis:

> Ludovic Court=C3=A8s <ludo@HIDDEN> skribis:
>
>> First, the person who wrote =E2=80=98connect*=E2=80=99 *cough* hadn=E2=
=80=99t carefully read the
>> Guile manual, which reads (info "(guile) Ports and File Descriptors"):
>>
>>   Note that =E2=80=98select=E2=80=99 may return early for other reasons,=
 for example due
>>   to pending interrupts.
>>
>> Clearly, =E2=80=98select=E2=80=99 is returning early, so we should check=
 that and loop.
>
> Pushed a fix for that in fc6c96c88a0e4ad0b9e48272e5f97ffaa6eec36e.

=E2=80=A6 and updated the =E2=80=98guix=E2=80=99 package in
3c91f4ca490a7ac56dc0aebbca9c4bf4df201877, which should address
=E2=80=98connect*=E2=80=99 timeout issues that were coming from =E2=80=98gu=
ix substitute=E2=80=99.

Ludo=E2=80=99.

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From: Josselin Poiret <dev@HIDDEN>

* libguile/posix.c (piped_process): Open /dev/null to use as in/out/err
if the corresponding port is not backed by a file descriptor.
---
 libguile/posix.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/libguile/posix.c b/libguile/posix.c
index 2969f1f24..f41a99efe 100644
--- a/libguile/posix.c
+++ b/libguile/posix.c
@@ -1558,10 +1558,22 @@ piped_process (pid_t *pid, SCM prog, SCM args, SCM from, SCM to)
 
     if (SCM_OPOUTFPORTP ((port = scm_current_error_port ())))
       err = SCM_FPORT_FDES (port);
-    if (out == -1 && SCM_OPOUTFPORTP ((port = scm_current_output_port ())))
-      out = SCM_FPORT_FDES (port);
-    if (in == -1 && SCM_OPINFPORTP ((port = scm_current_input_port ())))
-      in = SCM_FPORT_FDES (port);
+    else
+      err = open ("/dev/null", O_WRONLY | O_CLOEXEC);
+    if (out == -1)
+      {
+        if (SCM_OPOUTFPORTP ((port = scm_current_output_port ())))
+          out = SCM_FPORT_FDES (port);
+        else
+          out = open ("/dev/null", O_WRONLY | O_CLOEXEC);
+      }
+    if (in == -1)
+      {
+        if (SCM_OPINFPORTP ((port = scm_current_input_port ())))
+          in = SCM_FPORT_FDES (port);
+        else
+          in = open ("/dev/null", O_RDONLY | O_CLOEXEC);
+      }
   }
 
   *pid = do_spawn (exec_file, exec_argv, exec_env, in, out, err, 1);
-- 
2.39.2

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From: Ludovic Courtès <ludo@HIDDEN>

* test-suite/tests/posix.test: New test for https://bugs.gnu.org/63024.
---
 test-suite/tests/posix.test | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/test-suite/tests/posix.test b/test-suite/tests/posix.test
index d5cf47cda..18dad8902 100644
--- a/test-suite/tests/posix.test
+++ b/test-suite/tests/posix.test
@@ -374,7 +374,17 @@
                     (system* "sh" "-c" "echo bong >&2"))))))))
 
       (and (zero? (status:exit-val status))
-           (call-with-input-file file get-string-all)))))
+           (call-with-input-file file get-string-all))))
+
+  (pass-if-equal "https://bugs.gnu.org/63024"
+      0
+    (if (file-exists? "/proc/self/fd/0")          ;on GNU/Linux?
+        (parameterize ((current-output-port (%make-void-port "w0")))
+          (system* "guile" "-c"
+                   (object->string
+                    '(exit (string=? "/dev/null"
+                                     (readlink "/proc/self/fd/1"))))))
+        (throw 'unresolved))))
 
 ;;
 ;; spawn
-- 
2.39.2

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From: Josselin Poiret <dev@HIDDEN>

* libguile/posix.c (do_spawn): Add error handling if
posix_spawn_file_actions_adddup2 fails.
---
Hi Ludo,

Sorry for not noticing this thread sooner!  Here's my take on it, a minor
variation but that's what I'd prefer tbh.

LMKWYT,
Josselin

 libguile/posix.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/libguile/posix.c b/libguile/posix.c
index 3adc743c4..2969f1f24 100644
--- a/libguile/posix.c
+++ b/libguile/posix.c
@@ -1390,12 +1390,15 @@ do_spawn (char *exec_file, char **exec_argv, char **exec_env,
   /* Move the fds out of the way, so that duplicate fds or fds equal
      to 0, 1, 2 don't trample each other */
 
-  posix_spawn_file_actions_adddup2 (&actions, in, fd_slot[0]);
-  posix_spawn_file_actions_adddup2 (&actions, out, fd_slot[1]);
-  posix_spawn_file_actions_adddup2 (&actions, err, fd_slot[2]);
-  posix_spawn_file_actions_adddup2 (&actions, fd_slot[0], 0);
-  posix_spawn_file_actions_adddup2 (&actions, fd_slot[1], 1);
-  posix_spawn_file_actions_adddup2 (&actions, fd_slot[2], 2);
+  int dup2_action_from[] = {in, out, err,
+                            fd_slot[0], fd_slot[1], fd_slot[2]};
+  int dup2_action_to  [] = {fd_slot[0], fd_slot[1], fd_slot[2],
+                            0, 1, 2};
+
+  errno = 0;
+  for (int i = 0;i < sizeof (dup2_action_from) / sizeof (int);i++)
+    if ((errno = posix_spawn_file_actions_adddup2 (&actions, dup2_action_from[i], dup2_action_to[i])))
+        return -1;
 
 #ifdef HAVE_ADDCLOSEFROM
   /* This function appears in glibc 2.34.  It's both free from race

base-commit: fe6cc6d04ab094ea802907bdc4f728416c0e97ba
-- 
2.39.2

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From: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
References: <87mt2l4whd.fsf@HIDDEN>
 <f7db538ea324545f2e297b6a6cdcd937f889ef63.1683293896.git.dev@HIDDEN>
Date: Mon, 08 May 2023 16:08:44 +0200
In-Reply-To: <f7db538ea324545f2e297b6a6cdcd937f889ef63.1683293896.git.dev@HIDDEN>
 (Josselin Poiret's message of "Fri, 5 May 2023 15:39:22 +0200")
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Hi Josselin,

Josselin Poiret <dev@HIDDEN> skribis:

> Sorry for not noticing this thread sooner!  Here's my take on it, a minor
> variation but that's what I'd prefer tbh.

Even nicer!  Pushed to =E2=80=98main=E2=80=99 as two patches (I folded the =
test along
with the fix, for clarity) and with cosmetic changes to match GNU coding
style for C.

  36fd2b492 main origin/main Use /dev/null in 'piped-process' if port is no=
t backed by a fdes.
  ccd7400fd Add error handling for spawn's posix_spawn_file_actions_adddup2.

Thanks!

Ludo=E2=80=99.

Last modified: Mon, 8 May 2023 14:15:01 UTC

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