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Re: I upgraded the wc tool
From: |
Bob Proulx |
Subject: |
Re: I upgraded the wc tool |
Date: |
Sun, 12 Jun 2005 11:00:27 -0600 |
User-agent: |
Mutt/1.5.9i |
Note that bug-textutils is an obsolete address. I have changed the
headers accordingly to address@hidden Please followup there.
Herve Seignole wrote:
> I upgraded the wc tool. I added two commands :
>
> - "-n", "--noname". This command don't print the filename
This is currently accomplished simply using a rederection from the
file. This would be preferred for portability of scripts as it would
work with any 'wc' from any system.
wc -l < file
> - "-s", "--nospace". This command don't use the "human
> readable function" and don't print spaces before each
> number.
That is already the default behavior in the current coreutils. It
changed in coreutils-5.0.90 (2003-07-29).
wc -l < /dev/null
0
No spaces are printed. However you might find this previous message
useful. (Summary, I argue that one should not count on this because
other systems still print spaces.)
http://lists.gnu.org/archive/html/bug-textutils/2002-11/msg00000.html
It seems you have an old version of the code base. The current code
base is here:
STABLE
ftp://ftp.gnu.org/gnu/coreutils/coreutils-5.2.1.tar.gz
ftp://ftp.gnu.org/gnu/coreutils/coreutils-5.2.1.tar.bz2
BETA
ftp://alpha.gnu.org/gnu/coreutils/coreutils-5.3.0.tar.gz
ftp://alpha.gnu.org/gnu/coreutils/coreutils-5.3.0.tar.bz2
The current daily CVS of the source code is available from savannah.
http://savannah.gnu.org/cvs/?group=coreutils
> These evolutions are useful for me especially if I would like
> to use wc in "if condition" (shell script).
>
> Exemple :
>
> if [ `wc -l -n foo.txt` = 1 ]
> then
> echo "here"
> fi
There are many different ways to do this. Remembering that "=" is a
text comparison and that "-eq" is a numeric comparison let me suggest
this:
if [ `wc -l < foo.txt` -eq 1 ]
then
echo "here"
fi
I think that reads best. It is still possible to do text comparisons:
if [ x`wc -l < foo.txt | tr -d ' '` = x1 ]
Bob