From: Remigiusz Leon Suwalski <remigiusz.suwalski@protonmail.ch>
To: "util-linux@vger.kernel.org" <util-linux@vger.kernel.org>
Subject: Piped `column -t` inserts extra newlines since Oct 2023
Date: Mon, 04 Dec 2023 17:26:05 +0000 [thread overview]
Message-ID: <StZBjLc2hfwARaOlTwkjpnqrtWLLL_rya0UmGRk5OFwX1Y1KthwQWBz5bcDpEOjcq2hbJ6aY4fcoAMU3pU2spFhGDbGwmd4puAzNrvspFpE=@protonmail.ch> (raw)
Hi,
I have discovered that `column` utility behaves oddly when piped to another command, as shown on examples below. I am not sure whether this is a bug or intended behaviour.
First `column` built from sources (commit https://git.kernel.org/pub/scm/utils/util-linux/util-linux.git/commit/?id=94feb5a20d23904cc15cd857c4e00f35f495116c):
$ echo '_ __ ___ ________ __________ ________' | ./column -t | nl # strange
1 __
2 ___
3 ___
4 _________
5 __________
6 _______
$ echo '_ __ ___ ________ __________ ________' | ./column -t > file.txt # the same issue as above
$ echo '_ __ ___ ________ __________ ________' | ./column -t # expected
_ __ ___ ________ __________ ________
A workaround that works sometimes (on this and some other but not all inputs) is to pass -c 0 option:
$ echo '_ __ ___ ________ __________ ________' | ./column -t -c 0 | nl # expected
1 _ __ ___ ________ __________ ________
Separate binary built from parent commit 3949a48dd1351cea7c523fe97666190359247630 behaves well:
$ echo '_ __ ___ ________ __________ ________' | ./column -t | nl
1 _ __ ___ ________ __________ ________
If it matters, the output of "tput cols" command is 252, operating system is Ubuntu 22.04.3 and my locale is as follows:
LANG=C.UTF-8
LANGUAGE=
LC_CTYPE="C.UTF-8"
LC_NUMERIC="C.UTF-8"
LC_TIME="C.UTF-8"
LC_COLLATE="C.UTF-8"
LC_MONETARY="C.UTF-8"
LC_MESSAGES="C.UTF-8"
LC_PAPER="C.UTF-8"
LC_NAME="C.UTF-8"
LC_ADDRESS="C.UTF-8"
LC_TELEPHONE="C.UTF-8"
LC_MEASUREMENT="C.UTF-8"
LC_IDENTIFICATION="C.UTF-8"
LC_ALL=
Best regards,
Leon Suwalski
next reply other threads:[~2023-12-04 17:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-04 17:26 Remigiusz Leon Suwalski [this message]
2023-12-05 10:26 ` Piped `column -t` inserts extra newlines since Oct 2023 Karel Zak
2023-12-05 11:22 ` Remigiusz Leon Suwalski
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