X-Loop: help-debbugs@HIDDEN
Subject: bug#77535: timeout treats very short durations as `0`
Resent-From: Nicolas Boichat <nicolas@HIDDEN>
Original-Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
Resent-CC: bug-coreutils@HIDDEN
Resent-Date: Fri, 04 Apr 2025 16:13:02 +0000
Resent-Message-ID: <handler.77535.B.174378313531834 <at> debbugs.gnu.org>
Resent-Sender: help-debbugs@HIDDEN
X-GNU-PR-Message: report 77535
X-GNU-PR-Package: coreutils
X-GNU-PR-Keywords:
To: 77535 <at> debbugs.gnu.org
X-Debbugs-Original-To: bug-coreutils@HIDDEN
Received: via spool by submit <at> debbugs.gnu.org id=B.174378313531834
(code B ref -1); Fri, 04 Apr 2025 16:13:02 +0000
Received: (at submit) by debbugs.gnu.org; 4 Apr 2025 16:12:15 +0000
Received: from localhost ([127.0.0.1]:39665 helo=debbugs.gnu.org)
by debbugs.gnu.org with esmtp (Exim 4.84_2)
(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
id 1u0jeR-0008HO-7l
for submit <at> debbugs.gnu.org; Fri, 04 Apr 2025 12:12:15 -0400
Received: from lists.gnu.org ([2001:470:142::17]:43010)
by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
(Exim 4.84_2) (envelope-from <nicolas.boichat@HIDDEN>)
id 1u0ix5-00067z-5d
for submit <at> debbugs.gnu.org; Fri, 04 Apr 2025 11:27:27 -0400
Received: from eggs.gnu.org ([2001:470:142:3::10])
by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
(Exim 4.90_1) (envelope-from <nicolas.boichat@HIDDEN>)
id 1u0iwq-00066D-QB
for bug-coreutils@HIDDEN; Fri, 04 Apr 2025 11:27:13 -0400
Received: from mail-io1-f42.google.com ([209.85.166.42])
by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)
(Exim 4.90_1) (envelope-from <nicolas.boichat@HIDDEN>)
id 1u0iwp-0005If-6M
for bug-coreutils@HIDDEN; Fri, 04 Apr 2025 11:27:12 -0400
Received: by mail-io1-f42.google.com with SMTP id
ca18e2360f4ac-85b4277d03fso81705639f.1
for <bug-coreutils@HIDDEN>; Fri, 04 Apr 2025 08:27:10 -0700 (PDT)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=1e100.net; s=20230601; t=1743780429; x=1744385229;
h=to:subject:message-id:date:from:mime-version:x-gm-message-state
:from:to:cc:subject:date:message-id:reply-to;
bh=kMIAk8BIWY1vriXK6/7sVpHCFuZdumn0ziOYcRZh5wg=;
b=VdViJk6eKzdjmOQ8e2RixVPrUpjeP1stzk1v5k5kMBsebRqmSuchiR/ZSyuD08INEV
nuDTHkcvq3by7YyDDyIwRmEMCjcC6QZLllOIXTpek7rjmtWwAlbOSigq3x6k0YcsYDgT
VAl8B+/vf2Yoz6DjyaWrERe1m++SEkVFrvZtm1Tq7obrcoyNLy+jVEhXptLHJLssiYk0
hdTiK7tIZ21sm7PlLcdtKrjVZQCVNClCOC56/nf2rgUOQ7N3fYS9kAhjhLjWHl4qL2PX
3aTkeYwqVxripHaCQ3QWXHKvn+JDNGS2IQa1YRkA/LCG8K6l3PgLpHGhV5T0VbCYIUyU
j8Eg==
X-Gm-Message-State: AOJu0YzjncONw5Pbrpb20Wc+4IyqN5F7PvcFIKRQo6cnH6hDYa22O1I7
LLxKPtLJJlpccwHocFdemXx/fVS7RiaRKkEhmC8FCNbwUEPsWFiQBNwnrkD2pnWjD7HY0OXRkCg
EW+4y3DL+q8I+z7/owBJptltl53luvBPPjEY=
X-Gm-Gg: ASbGncve+HU+XwWkLd94E876hDbcisZQCiCwwPVLJwTK8SNZEWrKuv1tYWPsOTeVwLu
6GKSpEVZpxPEDh/e5sptbCD9s1Qy0oOz2pIMAOLxRzEO5uYUrdU8n15vqHm/5/Hm8GNf7V49Hbv
fjpD4T1eGEt6OrjvGJEWVbf+Zgy43vAzqf34E=
X-Google-Smtp-Source: AGHT+IGCEUgbNbaSUg+ijpRv0pQg+j6Ypa7RBrPPFwIyvyF/PLYYCodJs3relLklUxHYbQNZoOGaa3OipvrDASwceBg=
X-Received: by 2002:a05:6e02:3701:b0:3ce:4b12:fa17 with SMTP id
e9e14a558f8ab-3d6e3f7f812mr45735545ab.19.1743780428844; Fri, 04 Apr 2025
08:27:08 -0700 (PDT)
MIME-Version: 1.0
From: Nicolas Boichat <nicolas@HIDDEN>
Date: Fri, 4 Apr 2025 17:26:56 +0200
X-Gm-Features: ATxdqUEoSIp3-7q8UzAhlw1H5z2kM9CSaO2hZ_WSwYIA0wWPqIMo8N1xHgLhNZ8
Message-ID: <CAM6NUi5isNtqv5-UqtA4yMBTZcs1+sMLJ6uQvKn7QpE7pSS0dg@HIDDEN>
Content-Type: text/plain; charset="UTF-8"
Received-SPF: pass client-ip=209.85.166.42;
envelope-from=nicolas.boichat@HIDDEN; helo=mail-io1-f42.google.com
X-Spam_score_int: -18
X-Spam_score: -1.9
X-Spam_bar: -
X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9,
FREEMAIL_FORGED_FROMDOMAIN=0.001, FREEMAIL_FROM=0.001,
HEADER_FROM_DIFFERENT_DOMAINS=0.001, RCVD_IN_DNSWL_NONE=-0.0001,
RCVD_IN_MSPIKE_H2=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001,
RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001,
SPF_PASS=-0.001 autolearn=ham autolearn_force=no
X-Spam_action: no action
X-Spam-Score: 1.0 (+)
X-Mailman-Approved-At: Fri, 04 Apr 2025 12:12:13 -0400
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>,
<mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>,
<mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -0.0 (/)
Hi,
Version: timeout (GNU coreutils) 9.6, Archlinux, x86-64.
While playing with different duration parameters to `timeout`, I
noticed that extremely short durations, like `1e-3000`, are rounded
down to `0`. The problem is that `0` has a special meaning (disabling
the timeout), so I don't think this is desired.
All of these commands exit immediately:
```
timeout 0.0001 cat
timeout 1e-100 cat
timeout 1e-300 cat
timeout 1e-323 cat
```
But these never exits:
```
timeout 1e-324 cat
timeout 1e-3000 cat
```
As if we had typed:
```
timeout 0 cat
```
I think there is some logic in `printf` to handle float parsing
underflow, so maybe this can be reused in `timeout` as well.
Thanks,
Content-Disposition: inline Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Mailer: MIME-tools 5.505 (Entity 5.505) Content-Type: text/plain; charset=utf-8 X-Loop: help-debbugs@HIDDEN From: help-debbugs@HIDDEN (GNU bug Tracking System) To: Nicolas Boichat <nicolas@HIDDEN> Subject: bug#77535: Acknowledgement (timeout treats very short durations as `0`) Message-ID: <handler.77535.B.174378313531834.ack <at> debbugs.gnu.org> References: <CAM6NUi5isNtqv5-UqtA4yMBTZcs1+sMLJ6uQvKn7QpE7pSS0dg@HIDDEN> X-Gnu-PR-Message: ack 77535 X-Gnu-PR-Package: coreutils Reply-To: 77535 <at> debbugs.gnu.org Date: Fri, 04 Apr 2025 16:13:02 +0000 Thank you for filing a new bug report with debbugs.gnu.org. This is an automatically generated reply to let you know your message has been received. Your message is being forwarded to the package maintainers and other interested parties for their attention; they will reply in due course. Your message has been sent to the package maintainer(s): bug-coreutils@HIDDEN If you wish to submit further information on this problem, please send it to 77535 <at> debbugs.gnu.org. Please do not send mail to help-debbugs@HIDDEN unless you wish to report a problem with the Bug-tracking system. --=20 77535: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D77535 GNU Bug Tracking System Contact help-debbugs@HIDDEN with problems
MIME-Version: 1.0
X-Mailer: MIME-tools 5.505 (Entity 5.505)
X-Loop: help-debbugs@HIDDEN
From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: =?UTF-8?Q?P=C3=A1draig?= Brady <P@HIDDEN>
Subject: bug#77535: closed (timeout treats very short durations as `0`)
CC: tracker <at> debbugs.gnu.org
Message-ID: <handler.77535.D77535.174379488730638.ackdone <at> debbugs.gnu.org>
References: <a1cfeefb-ca6d-42a5-8701-8e8c0d607b87@HIDDEN>
<CAM6NUi5isNtqv5-UqtA4yMBTZcs1+sMLJ6uQvKn7QpE7pSS0dg@HIDDEN>
X-Gnu-PR-Message: closed 77535
X-Gnu-PR-Package: coreutils
Date: Fri, 04 Apr 2025 19:29:02 +0000
Content-Type: multipart/mixed; boundary="----------=_1743794942-30742-0"
This is a multi-part message in MIME format...
------------=_1743794942-30742-0
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain; charset=utf-8
Your message dated Fri, 4 Apr 2025 20:27:55 +0100
with message-id <a1cfeefb-ca6d-42a5-8701-8e8c0d607b87@HIDDEN>
and subject line Re: bug#77535: timeout treats very short durations as `0`
has caused the debbugs.gnu.org bug report #77535,
regarding timeout treats very short durations as `0`
to be marked as done.
(If you believe you have received this mail in error, please contact
help-debbugs@HIDDEN)
--=20
77535: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D77535
GNU Bug Tracking System
Contact help-debbugs@HIDDEN with problems
------------=_1743794942-30742-0
Content-Type: message/rfc822
Content-Disposition: inline
Content-Transfer-Encoding: 7bit
Received: (at submit) by debbugs.gnu.org; 4 Apr 2025 16:12:15 +0000
Received: from localhost ([127.0.0.1]:39665 helo=debbugs.gnu.org)
by debbugs.gnu.org with esmtp (Exim 4.84_2)
(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
id 1u0jeR-0008HO-7l
for submit <at> debbugs.gnu.org; Fri, 04 Apr 2025 12:12:15 -0400
Received: from lists.gnu.org ([2001:470:142::17]:43010)
by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
(Exim 4.84_2) (envelope-from <nicolas.boichat@HIDDEN>)
id 1u0ix5-00067z-5d
for submit <at> debbugs.gnu.org; Fri, 04 Apr 2025 11:27:27 -0400
Received: from eggs.gnu.org ([2001:470:142:3::10])
by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
(Exim 4.90_1) (envelope-from <nicolas.boichat@HIDDEN>)
id 1u0iwq-00066D-QB
for bug-coreutils@HIDDEN; Fri, 04 Apr 2025 11:27:13 -0400
Received: from mail-io1-f42.google.com ([209.85.166.42])
by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)
(Exim 4.90_1) (envelope-from <nicolas.boichat@HIDDEN>)
id 1u0iwp-0005If-6M
for bug-coreutils@HIDDEN; Fri, 04 Apr 2025 11:27:12 -0400
Received: by mail-io1-f42.google.com with SMTP id
ca18e2360f4ac-85b4277d03fso81705639f.1
for <bug-coreutils@HIDDEN>; Fri, 04 Apr 2025 08:27:10 -0700 (PDT)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=1e100.net; s=20230601; t=1743780429; x=1744385229;
h=to:subject:message-id:date:from:mime-version:x-gm-message-state
:from:to:cc:subject:date:message-id:reply-to;
bh=kMIAk8BIWY1vriXK6/7sVpHCFuZdumn0ziOYcRZh5wg=;
b=VdViJk6eKzdjmOQ8e2RixVPrUpjeP1stzk1v5k5kMBsebRqmSuchiR/ZSyuD08INEV
nuDTHkcvq3by7YyDDyIwRmEMCjcC6QZLllOIXTpek7rjmtWwAlbOSigq3x6k0YcsYDgT
VAl8B+/vf2Yoz6DjyaWrERe1m++SEkVFrvZtm1Tq7obrcoyNLy+jVEhXptLHJLssiYk0
hdTiK7tIZ21sm7PlLcdtKrjVZQCVNClCOC56/nf2rgUOQ7N3fYS9kAhjhLjWHl4qL2PX
3aTkeYwqVxripHaCQ3QWXHKvn+JDNGS2IQa1YRkA/LCG8K6l3PgLpHGhV5T0VbCYIUyU
j8Eg==
X-Gm-Message-State: AOJu0YzjncONw5Pbrpb20Wc+4IyqN5F7PvcFIKRQo6cnH6hDYa22O1I7
LLxKPtLJJlpccwHocFdemXx/fVS7RiaRKkEhmC8FCNbwUEPsWFiQBNwnrkD2pnWjD7HY0OXRkCg
EW+4y3DL+q8I+z7/owBJptltl53luvBPPjEY=
X-Gm-Gg: ASbGncve+HU+XwWkLd94E876hDbcisZQCiCwwPVLJwTK8SNZEWrKuv1tYWPsOTeVwLu
6GKSpEVZpxPEDh/e5sptbCD9s1Qy0oOz2pIMAOLxRzEO5uYUrdU8n15vqHm/5/Hm8GNf7V49Hbv
fjpD4T1eGEt6OrjvGJEWVbf+Zgy43vAzqf34E=
X-Google-Smtp-Source: AGHT+IGCEUgbNbaSUg+ijpRv0pQg+j6Ypa7RBrPPFwIyvyF/PLYYCodJs3relLklUxHYbQNZoOGaa3OipvrDASwceBg=
X-Received: by 2002:a05:6e02:3701:b0:3ce:4b12:fa17 with SMTP id
e9e14a558f8ab-3d6e3f7f812mr45735545ab.19.1743780428844; Fri, 04 Apr 2025
08:27:08 -0700 (PDT)
MIME-Version: 1.0
From: Nicolas Boichat <nicolas@HIDDEN>
Date: Fri, 4 Apr 2025 17:26:56 +0200
X-Gm-Features: ATxdqUEoSIp3-7q8UzAhlw1H5z2kM9CSaO2hZ_WSwYIA0wWPqIMo8N1xHgLhNZ8
Message-ID: <CAM6NUi5isNtqv5-UqtA4yMBTZcs1+sMLJ6uQvKn7QpE7pSS0dg@HIDDEN>
Subject: timeout treats very short durations as `0`
To: bug-coreutils@HIDDEN
Content-Type: text/plain; charset="UTF-8"
Received-SPF: pass client-ip=209.85.166.42;
envelope-from=nicolas.boichat@HIDDEN; helo=mail-io1-f42.google.com
X-Spam_score_int: -18
X-Spam_score: -1.9
X-Spam_bar: -
X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9,
FREEMAIL_FORGED_FROMDOMAIN=0.001, FREEMAIL_FROM=0.001,
HEADER_FROM_DIFFERENT_DOMAINS=0.001, RCVD_IN_DNSWL_NONE=-0.0001,
RCVD_IN_MSPIKE_H2=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001,
RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001,
SPF_PASS=-0.001 autolearn=ham autolearn_force=no
X-Spam_action: no action
X-Spam-Score: 1.0 (+)
X-Debbugs-Envelope-To: submit
X-Mailman-Approved-At: Fri, 04 Apr 2025 12:12:13 -0400
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>,
<mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>,
<mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -0.0 (/)
Hi,
Version: timeout (GNU coreutils) 9.6, Archlinux, x86-64.
While playing with different duration parameters to `timeout`, I
noticed that extremely short durations, like `1e-3000`, are rounded
down to `0`. The problem is that `0` has a special meaning (disabling
the timeout), so I don't think this is desired.
All of these commands exit immediately:
```
timeout 0.0001 cat
timeout 1e-100 cat
timeout 1e-300 cat
timeout 1e-323 cat
```
But these never exits:
```
timeout 1e-324 cat
timeout 1e-3000 cat
```
As if we had typed:
```
timeout 0 cat
```
I think there is some logic in `printf` to handle float parsing
underflow, so maybe this can be reused in `timeout` as well.
Thanks,
------------=_1743794942-30742-0
Content-Type: message/rfc822
Content-Disposition: inline
Content-Transfer-Encoding: 7bit
Received: (at 77535-done) by debbugs.gnu.org; 4 Apr 2025 19:28:07 +0000
Received: from localhost ([127.0.0.1]:40189 helo=debbugs.gnu.org)
by debbugs.gnu.org with esmtp (Exim 4.84_2)
(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
id 1u0mhy-0007y6-M1
for submit <at> debbugs.gnu.org; Fri, 04 Apr 2025 15:28:06 -0400
Received: from mail-wr1-x430.google.com ([2a00:1450:4864:20::430]:57760)
by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)
(Exim 4.84_2) (envelope-from <pixelbeat@HIDDEN>)
id 1u0mhv-0007xU-7i
for 77535-done <at> debbugs.gnu.org; Fri, 04 Apr 2025 15:28:03 -0400
Received: by mail-wr1-x430.google.com with SMTP id
ffacd0b85a97d-39ac9aea656so2138200f8f.3
for <77535-done <at> debbugs.gnu.org>; Fri, 04 Apr 2025 12:28:03 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=gmail.com; s=20230601; t=1743794877; x=1744399677; darn=debbugs.gnu.org;
h=content-transfer-encoding:in-reply-to:from:content-language
:references:to:subject:user-agent:mime-version:date:message-id
:sender:from:to:cc:subject:date:message-id:reply-to;
bh=TcrGkF78pGioQb/5ZONU/YBobvsqcKnubgUjMn6Rl34=;
b=lAv880KTy3tJuCM8JdaEGqyQPDpdb0gTMkGB5pWTVK26xV39tfaq9muA5B1A99N92V
wUNGUt5jvSiCWRqhDCIQgEZwNkCdT63UGPbip8f3C+c7dfqlqJRwoEIv9ord0sGup4Re
2AQ29xChaaHnhSC4SBkizN+vyYD+kO0fTMUx6zYj2tXaGSTQi+XbpXWmhdeiCu4AF0ES
NQvkI0CmP3MS9O8n4etLpzWGExwK7KGC7PWsJbBo/EUXe5273ZHDNSpQwuC2jHLVOqos
J0tlPAJJykTMyqd8XRmarP46gh3+Jm44yVQfd4/xIRWAWa2fTa6OxOuHj+nKrDTQf8mS
sgVw==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=1e100.net; s=20230601; t=1743794877; x=1744399677;
h=content-transfer-encoding:in-reply-to:from:content-language
:references:to:subject:user-agent:mime-version:date:message-id
:sender:x-gm-message-state:from:to:cc:subject:date:message-id
:reply-to;
bh=TcrGkF78pGioQb/5ZONU/YBobvsqcKnubgUjMn6Rl34=;
b=hyJy8g+fNzXp1hoGPB9Qs+sFCNT3TUNSghkoqrmTM3hJkdrfBeLwsBBhprihFSKq9C
KnuJcYJc8BSMfMVPFN76C8uAV32BZKCySNnvJTYVIDmqbAzhtfuvnlTt30biS9cIKMQd
ByjrmfBf6v2EgPz8YJDkLVI90LVGgY4YLirJyK69mm6KAoOpzQ20reawPMHnRWgDRkv1
9XdVzqKdaRIv1S+lGvw/skbyJuugl/WV3aCQNse/Gi4PdZ40zTnUs3wjXUJNexQvqcUT
w+kHVaX0XUQAuvXGEbmlFWE8yLnrwxf4mfDV7qaW34bedxGI5n3++arP9l3iC5itL4bh
dP7Q==
X-Forwarded-Encrypted: i=1;
AJvYcCWqlBW6Bhspt/2OuuPNjOxJ1qZjSTEuzD8SMMjEQix9MVeEcaqo8XFKynxR7PYQGIc0tzem7KNr+Ni1 <at> debbugs.gnu.org
X-Gm-Message-State: AOJu0Yz/x/g1b0bQSKamq/eQGCuqv4FL8BKt+91dlNvhOh45IwQEz+w6
jOn5d8qmdjvZDoDsppO5H2RgsrIWWBlhsiFzKcuLWwGoyEtb8muDAELJ/9eA6rw=
X-Gm-Gg: ASbGnctY8JO/Arlrg9LCQVgBjPcBoIfivX9HT7Ak+wFToo/wreMa/vdvUAkggIWJSlU
FYoNlPFHCPgp15W/hA4V2dbdCZ6dCz8k9DkPMGLL6nPLc8qf85ivM9iy6LbQUyMBAdteDoIHJCg
vHOoNkafZUgTnqg0YO5BdtvRQRKcRDjIOZmPti1/1BaDsgv+e8agSjTqyc45I2vPbGMp3VPHYHv
gtg1qpmMw+9GX/j4BhOrjmZUF9WZguLyYvv0/Kgco3ir7TBT40zJd4sdgsFZ51a5xtxQq45pFJ7
LGL9pZhnw1XJMdg28Uo1PInJBARwThq3DWHWyR+b/lkqSK2pC1AV8nFf/PL60CpMybgcaBRPEI3
SjXm+EbZtH0ZZ5sA50yBwcRmaCL7TQCluMf8=
X-Google-Smtp-Source: AGHT+IF0BG7n4Noss0G+N5uZzrF7tR7/gEOMd+7yf62lmD80EnH0RGf2Ib4/b+LTpGR9kf/K9J2xig==
X-Received: by 2002:a5d:588f:0:b0:39c:1efd:ed8f with SMTP id
ffacd0b85a97d-39d14662e4dmr3134696f8f.50.1743794876599;
Fri, 04 Apr 2025 12:27:56 -0700 (PDT)
Received: from [192.168.1.31]
(86-44-211-146-dynamic.agg2.lod.rsl-rtd.eircom.net. [86.44.211.146])
by smtp.googlemail.com with ESMTPSA id
ffacd0b85a97d-39c301b7933sm5239401f8f.54.2025.04.04.12.27.55
(version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128);
Fri, 04 Apr 2025 12:27:56 -0700 (PDT)
Message-ID: <a1cfeefb-ca6d-42a5-8701-8e8c0d607b87@HIDDEN>
Date: Fri, 4 Apr 2025 20:27:55 +0100
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird Beta
Subject: Re: bug#77535: timeout treats very short durations as `0`
To: Nicolas Boichat <nicolas@HIDDEN>, 77535-done <at> debbugs.gnu.org
References: <CAM6NUi5isNtqv5-UqtA4yMBTZcs1+sMLJ6uQvKn7QpE7pSS0dg@HIDDEN>
Content-Language: en-US
From: =?UTF-8?Q?P=C3=A1draig_Brady?= <P@HIDDEN>
In-Reply-To: <CAM6NUi5isNtqv5-UqtA4yMBTZcs1+sMLJ6uQvKn7QpE7pSS0dg@HIDDEN>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
X-Spam-Score: 0.0 (/)
X-Debbugs-Envelope-To: 77535-done
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>,
<mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>,
<mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -1.0 (-)
On 04/04/2025 16:26, Nicolas Boichat wrote:
> Hi,
>
> Version: timeout (GNU coreutils) 9.6, Archlinux, x86-64.
>
> While playing with different duration parameters to `timeout`, I
> noticed that extremely short durations, like `1e-3000`, are rounded
> down to `0`. The problem is that `0` has a special meaning (disabling
> the timeout), so I don't think this is desired.
>
> All of these commands exit immediately:
> ```
> timeout 0.0001 cat
> timeout 1e-100 cat
> timeout 1e-300 cat
> timeout 1e-323 cat
> ```
>
> But these never exits:
> ```
> timeout 1e-324 cat
> timeout 1e-3000 cat
> ```
>
> As if we had typed:
> ```
> timeout 0 cat
> ```
>
> I think there is some logic in `printf` to handle float parsing
> underflow, so maybe this can be reused in `timeout` as well.
The following should avoid this issue.
Marking this as done.
thanks!
Pádraig
diff --git a/src/timeout.c b/src/timeout.c
index 578d71070..6756cd888 100644
--- a/src/timeout.c
+++ b/src/timeout.c
@@ -371,6 +371,10 @@ parse_duration (char const *str)
usage (EXIT_CANCELED);
}
+ /* Clamp underflow to 1ns, as 0 disables the timeout. */
+ if (duration == 0 && errno == ERANGE)
+ duration = 1e-9;
+
return duration;
}
------------=_1743794942-30742-0--
MIME-Version: 1.0
X-Mailer: MIME-tools 5.505 (Entity 5.505)
X-Loop: help-debbugs@HIDDEN
From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Nicolas Boichat <nicolas@HIDDEN>
Subject: bug#77535: closed (Re: bug#77535: timeout treats very short
durations as `0`)
Message-ID: <handler.77535.D77535.174379488730638.notifdone <at> debbugs.gnu.org>
References: <a1cfeefb-ca6d-42a5-8701-8e8c0d607b87@HIDDEN>
<CAM6NUi5isNtqv5-UqtA4yMBTZcs1+sMLJ6uQvKn7QpE7pSS0dg@HIDDEN>
X-Gnu-PR-Message: they-closed 77535
X-Gnu-PR-Package: coreutils
Reply-To: 77535 <at> debbugs.gnu.org
Date: Fri, 04 Apr 2025 19:29:02 +0000
Content-Type: multipart/mixed; boundary="----------=_1743794942-30742-1"
This is a multi-part message in MIME format...
------------=_1743794942-30742-1
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain; charset="utf-8"
Your bug report
#77535: timeout treats very short durations as `0`
which was filed against the coreutils package, has been closed.
The explanation is attached below, along with your original report.
If you require more details, please reply to 77535 <at> debbugs.gnu.org.
--=20
77535: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D77535
GNU Bug Tracking System
Contact help-debbugs@HIDDEN with problems
------------=_1743794942-30742-1
Content-Type: message/rfc822
Content-Disposition: inline
Content-Transfer-Encoding: 7bit
Received: (at 77535-done) by debbugs.gnu.org; 4 Apr 2025 19:28:07 +0000
Received: from localhost ([127.0.0.1]:40189 helo=debbugs.gnu.org)
by debbugs.gnu.org with esmtp (Exim 4.84_2)
(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
id 1u0mhy-0007y6-M1
for submit <at> debbugs.gnu.org; Fri, 04 Apr 2025 15:28:06 -0400
Received: from mail-wr1-x430.google.com ([2a00:1450:4864:20::430]:57760)
by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)
(Exim 4.84_2) (envelope-from <pixelbeat@HIDDEN>)
id 1u0mhv-0007xU-7i
for 77535-done <at> debbugs.gnu.org; Fri, 04 Apr 2025 15:28:03 -0400
Received: by mail-wr1-x430.google.com with SMTP id
ffacd0b85a97d-39ac9aea656so2138200f8f.3
for <77535-done <at> debbugs.gnu.org>; Fri, 04 Apr 2025 12:28:03 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=gmail.com; s=20230601; t=1743794877; x=1744399677; darn=debbugs.gnu.org;
h=content-transfer-encoding:in-reply-to:from:content-language
:references:to:subject:user-agent:mime-version:date:message-id
:sender:from:to:cc:subject:date:message-id:reply-to;
bh=TcrGkF78pGioQb/5ZONU/YBobvsqcKnubgUjMn6Rl34=;
b=lAv880KTy3tJuCM8JdaEGqyQPDpdb0gTMkGB5pWTVK26xV39tfaq9muA5B1A99N92V
wUNGUt5jvSiCWRqhDCIQgEZwNkCdT63UGPbip8f3C+c7dfqlqJRwoEIv9ord0sGup4Re
2AQ29xChaaHnhSC4SBkizN+vyYD+kO0fTMUx6zYj2tXaGSTQi+XbpXWmhdeiCu4AF0ES
NQvkI0CmP3MS9O8n4etLpzWGExwK7KGC7PWsJbBo/EUXe5273ZHDNSpQwuC2jHLVOqos
J0tlPAJJykTMyqd8XRmarP46gh3+Jm44yVQfd4/xIRWAWa2fTa6OxOuHj+nKrDTQf8mS
sgVw==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=1e100.net; s=20230601; t=1743794877; x=1744399677;
h=content-transfer-encoding:in-reply-to:from:content-language
:references:to:subject:user-agent:mime-version:date:message-id
:sender:x-gm-message-state:from:to:cc:subject:date:message-id
:reply-to;
bh=TcrGkF78pGioQb/5ZONU/YBobvsqcKnubgUjMn6Rl34=;
b=hyJy8g+fNzXp1hoGPB9Qs+sFCNT3TUNSghkoqrmTM3hJkdrfBeLwsBBhprihFSKq9C
KnuJcYJc8BSMfMVPFN76C8uAV32BZKCySNnvJTYVIDmqbAzhtfuvnlTt30biS9cIKMQd
ByjrmfBf6v2EgPz8YJDkLVI90LVGgY4YLirJyK69mm6KAoOpzQ20reawPMHnRWgDRkv1
9XdVzqKdaRIv1S+lGvw/skbyJuugl/WV3aCQNse/Gi4PdZ40zTnUs3wjXUJNexQvqcUT
w+kHVaX0XUQAuvXGEbmlFWE8yLnrwxf4mfDV7qaW34bedxGI5n3++arP9l3iC5itL4bh
dP7Q==
X-Forwarded-Encrypted: i=1;
AJvYcCWqlBW6Bhspt/2OuuPNjOxJ1qZjSTEuzD8SMMjEQix9MVeEcaqo8XFKynxR7PYQGIc0tzem7KNr+Ni1 <at> debbugs.gnu.org
X-Gm-Message-State: AOJu0Yz/x/g1b0bQSKamq/eQGCuqv4FL8BKt+91dlNvhOh45IwQEz+w6
jOn5d8qmdjvZDoDsppO5H2RgsrIWWBlhsiFzKcuLWwGoyEtb8muDAELJ/9eA6rw=
X-Gm-Gg: ASbGnctY8JO/Arlrg9LCQVgBjPcBoIfivX9HT7Ak+wFToo/wreMa/vdvUAkggIWJSlU
FYoNlPFHCPgp15W/hA4V2dbdCZ6dCz8k9DkPMGLL6nPLc8qf85ivM9iy6LbQUyMBAdteDoIHJCg
vHOoNkafZUgTnqg0YO5BdtvRQRKcRDjIOZmPti1/1BaDsgv+e8agSjTqyc45I2vPbGMp3VPHYHv
gtg1qpmMw+9GX/j4BhOrjmZUF9WZguLyYvv0/Kgco3ir7TBT40zJd4sdgsFZ51a5xtxQq45pFJ7
LGL9pZhnw1XJMdg28Uo1PInJBARwThq3DWHWyR+b/lkqSK2pC1AV8nFf/PL60CpMybgcaBRPEI3
SjXm+EbZtH0ZZ5sA50yBwcRmaCL7TQCluMf8=
X-Google-Smtp-Source: AGHT+IF0BG7n4Noss0G+N5uZzrF7tR7/gEOMd+7yf62lmD80EnH0RGf2Ib4/b+LTpGR9kf/K9J2xig==
X-Received: by 2002:a5d:588f:0:b0:39c:1efd:ed8f with SMTP id
ffacd0b85a97d-39d14662e4dmr3134696f8f.50.1743794876599;
Fri, 04 Apr 2025 12:27:56 -0700 (PDT)
Received: from [192.168.1.31]
(86-44-211-146-dynamic.agg2.lod.rsl-rtd.eircom.net. [86.44.211.146])
by smtp.googlemail.com with ESMTPSA id
ffacd0b85a97d-39c301b7933sm5239401f8f.54.2025.04.04.12.27.55
(version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128);
Fri, 04 Apr 2025 12:27:56 -0700 (PDT)
Message-ID: <a1cfeefb-ca6d-42a5-8701-8e8c0d607b87@HIDDEN>
Date: Fri, 4 Apr 2025 20:27:55 +0100
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird Beta
Subject: Re: bug#77535: timeout treats very short durations as `0`
To: Nicolas Boichat <nicolas@HIDDEN>, 77535-done <at> debbugs.gnu.org
References: <CAM6NUi5isNtqv5-UqtA4yMBTZcs1+sMLJ6uQvKn7QpE7pSS0dg@HIDDEN>
Content-Language: en-US
From: =?UTF-8?Q?P=C3=A1draig_Brady?= <P@HIDDEN>
In-Reply-To: <CAM6NUi5isNtqv5-UqtA4yMBTZcs1+sMLJ6uQvKn7QpE7pSS0dg@HIDDEN>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
X-Spam-Score: 0.0 (/)
X-Debbugs-Envelope-To: 77535-done
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>,
<mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>,
<mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -1.0 (-)
On 04/04/2025 16:26, Nicolas Boichat wrote:
> Hi,
>
> Version: timeout (GNU coreutils) 9.6, Archlinux, x86-64.
>
> While playing with different duration parameters to `timeout`, I
> noticed that extremely short durations, like `1e-3000`, are rounded
> down to `0`. The problem is that `0` has a special meaning (disabling
> the timeout), so I don't think this is desired.
>
> All of these commands exit immediately:
> ```
> timeout 0.0001 cat
> timeout 1e-100 cat
> timeout 1e-300 cat
> timeout 1e-323 cat
> ```
>
> But these never exits:
> ```
> timeout 1e-324 cat
> timeout 1e-3000 cat
> ```
>
> As if we had typed:
> ```
> timeout 0 cat
> ```
>
> I think there is some logic in `printf` to handle float parsing
> underflow, so maybe this can be reused in `timeout` as well.
The following should avoid this issue.
Marking this as done.
thanks!
Pádraig
diff --git a/src/timeout.c b/src/timeout.c
index 578d71070..6756cd888 100644
--- a/src/timeout.c
+++ b/src/timeout.c
@@ -371,6 +371,10 @@ parse_duration (char const *str)
usage (EXIT_CANCELED);
}
+ /* Clamp underflow to 1ns, as 0 disables the timeout. */
+ if (duration == 0 && errno == ERANGE)
+ duration = 1e-9;
+
return duration;
}
------------=_1743794942-30742-1
Content-Type: message/rfc822
Content-Disposition: inline
Content-Transfer-Encoding: 7bit
Received: (at submit) by debbugs.gnu.org; 4 Apr 2025 16:12:15 +0000
Received: from localhost ([127.0.0.1]:39665 helo=debbugs.gnu.org)
by debbugs.gnu.org with esmtp (Exim 4.84_2)
(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
id 1u0jeR-0008HO-7l
for submit <at> debbugs.gnu.org; Fri, 04 Apr 2025 12:12:15 -0400
Received: from lists.gnu.org ([2001:470:142::17]:43010)
by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
(Exim 4.84_2) (envelope-from <nicolas.boichat@HIDDEN>)
id 1u0ix5-00067z-5d
for submit <at> debbugs.gnu.org; Fri, 04 Apr 2025 11:27:27 -0400
Received: from eggs.gnu.org ([2001:470:142:3::10])
by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)
(Exim 4.90_1) (envelope-from <nicolas.boichat@HIDDEN>)
id 1u0iwq-00066D-QB
for bug-coreutils@HIDDEN; Fri, 04 Apr 2025 11:27:13 -0400
Received: from mail-io1-f42.google.com ([209.85.166.42])
by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128)
(Exim 4.90_1) (envelope-from <nicolas.boichat@HIDDEN>)
id 1u0iwp-0005If-6M
for bug-coreutils@HIDDEN; Fri, 04 Apr 2025 11:27:12 -0400
Received: by mail-io1-f42.google.com with SMTP id
ca18e2360f4ac-85b4277d03fso81705639f.1
for <bug-coreutils@HIDDEN>; Fri, 04 Apr 2025 08:27:10 -0700 (PDT)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=1e100.net; s=20230601; t=1743780429; x=1744385229;
h=to:subject:message-id:date:from:mime-version:x-gm-message-state
:from:to:cc:subject:date:message-id:reply-to;
bh=kMIAk8BIWY1vriXK6/7sVpHCFuZdumn0ziOYcRZh5wg=;
b=VdViJk6eKzdjmOQ8e2RixVPrUpjeP1stzk1v5k5kMBsebRqmSuchiR/ZSyuD08INEV
nuDTHkcvq3by7YyDDyIwRmEMCjcC6QZLllOIXTpek7rjmtWwAlbOSigq3x6k0YcsYDgT
VAl8B+/vf2Yoz6DjyaWrERe1m++SEkVFrvZtm1Tq7obrcoyNLy+jVEhXptLHJLssiYk0
hdTiK7tIZ21sm7PlLcdtKrjVZQCVNClCOC56/nf2rgUOQ7N3fYS9kAhjhLjWHl4qL2PX
3aTkeYwqVxripHaCQ3QWXHKvn+JDNGS2IQa1YRkA/LCG8K6l3PgLpHGhV5T0VbCYIUyU
j8Eg==
X-Gm-Message-State: AOJu0YzjncONw5Pbrpb20Wc+4IyqN5F7PvcFIKRQo6cnH6hDYa22O1I7
LLxKPtLJJlpccwHocFdemXx/fVS7RiaRKkEhmC8FCNbwUEPsWFiQBNwnrkD2pnWjD7HY0OXRkCg
EW+4y3DL+q8I+z7/owBJptltl53luvBPPjEY=
X-Gm-Gg: ASbGncve+HU+XwWkLd94E876hDbcisZQCiCwwPVLJwTK8SNZEWrKuv1tYWPsOTeVwLu
6GKSpEVZpxPEDh/e5sptbCD9s1Qy0oOz2pIMAOLxRzEO5uYUrdU8n15vqHm/5/Hm8GNf7V49Hbv
fjpD4T1eGEt6OrjvGJEWVbf+Zgy43vAzqf34E=
X-Google-Smtp-Source: AGHT+IGCEUgbNbaSUg+ijpRv0pQg+j6Ypa7RBrPPFwIyvyF/PLYYCodJs3relLklUxHYbQNZoOGaa3OipvrDASwceBg=
X-Received: by 2002:a05:6e02:3701:b0:3ce:4b12:fa17 with SMTP id
e9e14a558f8ab-3d6e3f7f812mr45735545ab.19.1743780428844; Fri, 04 Apr 2025
08:27:08 -0700 (PDT)
MIME-Version: 1.0
From: Nicolas Boichat <nicolas@HIDDEN>
Date: Fri, 4 Apr 2025 17:26:56 +0200
X-Gm-Features: ATxdqUEoSIp3-7q8UzAhlw1H5z2kM9CSaO2hZ_WSwYIA0wWPqIMo8N1xHgLhNZ8
Message-ID: <CAM6NUi5isNtqv5-UqtA4yMBTZcs1+sMLJ6uQvKn7QpE7pSS0dg@HIDDEN>
Subject: timeout treats very short durations as `0`
To: bug-coreutils@HIDDEN
Content-Type: text/plain; charset="UTF-8"
Received-SPF: pass client-ip=209.85.166.42;
envelope-from=nicolas.boichat@HIDDEN; helo=mail-io1-f42.google.com
X-Spam_score_int: -18
X-Spam_score: -1.9
X-Spam_bar: -
X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9,
FREEMAIL_FORGED_FROMDOMAIN=0.001, FREEMAIL_FROM=0.001,
HEADER_FROM_DIFFERENT_DOMAINS=0.001, RCVD_IN_DNSWL_NONE=-0.0001,
RCVD_IN_MSPIKE_H2=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001,
RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001,
SPF_PASS=-0.001 autolearn=ham autolearn_force=no
X-Spam_action: no action
X-Spam-Score: 1.0 (+)
X-Debbugs-Envelope-To: submit
X-Mailman-Approved-At: Fri, 04 Apr 2025 12:12:13 -0400
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.18
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>,
<mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>,
<mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
X-Spam-Score: -0.0 (/)
Hi,
Version: timeout (GNU coreutils) 9.6, Archlinux, x86-64.
While playing with different duration parameters to `timeout`, I
noticed that extremely short durations, like `1e-3000`, are rounded
down to `0`. The problem is that `0` has a special meaning (disabling
the timeout), so I don't think this is desired.
All of these commands exit immediately:
```
timeout 0.0001 cat
timeout 1e-100 cat
timeout 1e-300 cat
timeout 1e-323 cat
```
But these never exits:
```
timeout 1e-324 cat
timeout 1e-3000 cat
```
As if we had typed:
```
timeout 0 cat
```
I think there is some logic in `printf` to handle float parsing
underflow, so maybe this can be reused in `timeout` as well.
Thanks,
------------=_1743794942-30742-1--
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997 nCipher Corporation Ltd,
1994-97 Ian Jackson.