Bug#3952: Less annoyances
'Christoph Lameter wrote:'
>
>A wish because of the heavy usage of gzipped files under debian:
>
>- Add functionality for less to automatically recognize a gzipped file
>and view it correctly without having to resort to zless.
I have code for that (or you can use most):
First set some environment variables in .bash_profile or /etc/profile:
export LESSCLOSE="lessclose.sh %s %s" LESSOPEN="lessopen.sh %s"
Then somewhere in $PATH put lessclose.sh and lessopen.sh:
$ cat /usr/local/bin/lessclose.sh
#!/bin/sh
rm $2
$ cat /usr/local/bin/lessopen.sh
#!/bin/sh
# When the environment variable LESSOPEN is set to refer to this file
# (e.g., LESSOPEN="lessopen.sh %s"), one can do several interesting
# things with pipes (see less(1) for details). Namely,
# 1. view any gzipped or compressed file(s) anywhere in the filesystem with
# the simple command "less filename(s)". And you can use less' multiple
# file searching and bookmark facilities on the gzipped files!
# 2. view a list of compressed and uncompressed files from the same
# command prompt (using all of less' multiple file features).
# 3. "zcat file.gz | less" still works.
if [ $1 != "-" ]; then # $1 = "-" when we are reading standard input
gzip -t $1 &> /dev/null
if [ $? -eq 0 ]; then # Is it compressed?
zcat $1 > /tmp/$$.`basename $1` # Use basename for files in
echo /tmp/$$.`basename $1` # other directories
fi
fi
exit 0
--
Christopher J. Fearnley | Linux/Internet Consulting
cjf@netaxs.com, cjf@onit.net | UNIX SIG Leader at PACS
http://www.netaxs.com/~cjf | (Philadelphia Area Computer Society)
ftp://ftp.netaxs.com/people/cjf | Design Science Revolutionary
"Dare to be Naive" -- Bucky Fuller | Explorer in Universe
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