GNU bug report logs - #70144
system* affects signal handlers

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Christopher Baines <mail <at> cbaines.net>
Subject: bug#70144: closed (Re: bug#70144: system* affects signal handlers)
Date: Mon, 06 May 2024 10:02:01 +0000

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Your bug report

#70144: system* affects signal handlers

which was filed against the guile package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 70144 <at> debbugs.gnu.org.

-- 
70144: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=70144
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Ludovic Courtès <ludo <at> gnu.org>
To: Josselin Poiret <dev <at> jpoiret.xyz>
Cc: Mikael Djurfeldt <mikael <at> djurfeldt.com>, 70144-done <at> debbugs.gnu.org,
 Christopher Baines <mail <at> cbaines.net>
Subject: Re: bug#70144: system* affects signal handlers
Date: Mon, 06 May 2024 12:00:34 +0200

Hi,

Josselin Poiret <dev <at> jpoiret.xyz> skribis:

> Yes, I believe this is all taken care of by our use of posix_spawn
> (which was the point in the first place :) ).

Yup!  I pushed the fix as 4ae33f76d6b33ea0bedfa36050d44c88d08c2823.

Thanks,
Ludo’.

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From: Christopher Baines <mail <at> cbaines.net>
To: bug-guile <at> gnu.org
Subject: system* affects signal handlers
Date: Tue, 02 Apr 2024 15:22:57 +0100

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I've encountered a situation where signal handlers don't seem to
run. With the following program, sending it SIGINT won't trigger the
handler, however if you remove the system* call, then the handler will
run.

  (use-modules (ice-9 threads))

  (call-with-new-thread
   (lambda ()
     ;; Remove the following system* call to fix the handler
     (system* "echo" "foo")))

  (sigaction SIGINT
    (lambda (sig)
      (peek "SIGINT handler")
      (exit 1)))

  (for-each
   (lambda _
     (sleep 1))
   (iota 30))

  (display "normal exit\n")

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