From: Timothy Sample <samplet@ngyro.com>
To: Danny Milosavljevic <dannym@scratchpost.org>
Cc: swedebugia@riseup.net, 33755@debbugs.gnu.org
Subject: bug#33755: error: execlp: No such file or directory from guix environment
Date: Sat, 15 Dec 2018 23:26:07 -0500 [thread overview]
Message-ID: <87efaiyu5c.fsf@ngyro.com> (raw)
In-Reply-To: <20181215203853.1b267a72@scratchpost.org> (Danny Milosavljevic's message of "Sat, 15 Dec 2018 20:38:53 +0100")
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Hi Danny,
Danny Milosavljevic <dannym@scratchpost.org> writes:
> Hi Tim,
>
> I like it in princple, but why special-case ENOENT? I think it would
> be better to just always print the program name (and maybe program
> args, too!) and the system error message.
You are right. I got fixated on the fact that it was failing the $PATH
search, and forgot about the more general cases. I think printing the
program name and the system error message is the right choice.
According to the manual for “execve”, the arguments only cause an error
if they exceed ARG_MAX, in which case we probably don’t want to print
them anyway.
Here’s an updated patch. I also got rid of the 127 status code, since
doesn’t make sense for the more general cases.
Thanks for the help!
-- Tim
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From aedc745a3f9765ae00dc61a59fa53d22a458551b Mon Sep 17 00:00:00 2001
From: Timothy Sample <samplet@ngyro.com>
Date: Sat, 15 Dec 2018 23:17:46 -0500
Subject: [PATCH] environment: Print command name on execlp error.
Fixes <https://bugs.gnu.org/33755>.
* guix/scripts/environment.scm (launch-environment): When execlp fails,
include the command name in the error message.
---
guix/scripts/environment.scm | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/guix/scripts/environment.scm b/guix/scripts/environment.scm
index 5965e3426..64035a740 100644
--- a/guix/scripts/environment.scm
+++ b/guix/scripts/environment.scm
@@ -389,7 +389,12 @@ variables are cleared before setting the new ones."
(create-environment profile manifest #:pure? pure?)
(match command
((program . args)
- (apply execlp program program args))))
+ (catch 'system-error
+ (lambda ()
+ (apply execlp program program args))
+ (lambda args
+ (let ((errno (system-error-errno args)))
+ (leave (G_ "~a: ~a~%") program (strerror errno))))))))
(define* (launch-environment/fork command profile manifest #:key pure?)
"Run COMMAND in a new process with an environment containing PROFILE, with
--
2.20.0
next prev parent reply other threads:[~2018-12-16 4:27 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-15 7:09 bug#33755: error: execlp: No such file or directory from guix environment swedebugia
2018-12-15 9:40 ` Julien Lepiller
2018-12-15 18:18 ` Timothy Sample
2018-12-15 18:35 ` Timothy Sample
2018-12-15 19:38 ` Danny Milosavljevic
2018-12-16 4:26 ` Timothy Sample [this message]
2018-12-16 16:05 ` Ludovic Courtès
2018-12-17 4:41 ` Timothy Sample
2018-12-18 9:05 ` Ludovic Courtès
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