Date: Mon, 2 Apr 2001 02:50:02 -0700 (PDT) From: Peter Pentchev <roam@orbitel.bg> To: freebsd-bugs@FreeBSD.org Subject: Re: bin/26283: column coredumps on specific input Message-ID: <200104020950.f329o2435401@freefall.freebsd.org>
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The following reply was made to PR bin/26283; it has been noted by GNATS.
From: Peter Pentchev <roam@orbitel.bg>
To: Steven Enderle <enderle@mdn.de>
Cc: freebsd-gnats-submit@FreeBSD.org
Subject: Re: bin/26283: column coredumps on specific input
Date: Mon, 2 Apr 2001 12:48:36 +0300
On Mon, Apr 02, 2001 at 11:24:47AM +0200, Steven Enderle wrote:
> This still doesn't help me much ... maybe it is not bug related, more
> user stupidy,
> but i will show you what i want to do:
>
> The following few lines (take 100.000 more and you got what i am sitting
> in front of) should be formated into two columns:
>
> --- snip ---
> 90 4y 8289! 182 ! 464 ! !
> 90 4y 8289! 182 ! 464 ! !
> 90 4y 8289! 182 ! 464 ! !
> 90 4y 8289! 182 ! 464 ! !
> --- snip ---
>
> so that the result looks like this:
>
> --- snip ---
> 90 4y 8289! 182 ! 464 ! !90 4y 8289! 182 ! 464
> ! !
> 90 4y 8289! 182 ! 464 ! !90 4y 8289! 182 ! 464
> ! !
> --- snip ---
>
> (printf '90 4y 8289! 182 ! 464 ! !\n90 4y 8289! 182 !
> 464 ! !\n90 4y 8289! 182 ! 464 ! !\n90 4y
> 8289! 182 ! 464 ! !\n' will give you the sample i am
> working with.)
>
> so i thought, column -c 2 should do it. ("-c Output is formatted
> for a display columns wide.")
[snip]
> is column that buggy? or am i too stupid to handle column correctly?
> is there any other easy way to do this?
Uhh.. column(1) doesn't work that way. The '-c' option is meant to
specify how many characters should there be in one line; think of
a display 80 columns wide - that's what -c 80 would be. By putting
-c 2 in there, you are telling column(1) that it should format its
output for 2 chars per line; it finds that most lines are longer
than 2 chars, so it just displays them as-is.
If all your lines have a fixed width, you should probably use
column with -c, but with a value just a bit more than twice
your line width. However, your lines seem to be exactly 40 chars
wide, which poses a problem - column(1) likes to add a tab between
the columns. You might get away with something like:
column -c 96 < yourfile | tr -d '\t'
..or..
column -c 96 < yourfile | perl -pe 's/!\t/!/g'
(I couldn't figure out the sed(1) escape sequence for a tab).
The 96 comes from 40 chars-line + tab = 48 chars.. to fit two of those
on a line, you need 96 chars per line.
Hope that helps..
G'luck,
Peter
--
No language can express every thought unambiguously, least of all this one.
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