Emulating :r and :e within a /bin/sh script

Leo Simon · 10-22-2004, 02:21 AM

I'd like to write the following kind of script in sh, using the expression :r from tcsh.

#!/bin/sh
file = ${1}:r

This would convert an argument with an extension to just the root of the extension.

But sh doesn't support :r, :e, etc. Is there another way to accomplish this/

Thanks very much for your help

ToniT · 10-22-2004, 02:47 AM

Code:

#!/bin/bash
file=${1/.*/}
echo $file

#Or with environment variables
foo=bar.baz
echo ${foo/.*/}

#.. or with sed
f=`echo $foo | sed 's/\..*//g'`
echo $f

#.. or with awk
f=`echo $foo | awk -F. '{print $1}'`
echo $f

#or with perl
f=`echo $foo | perl -ne 'split /\./; print $_[0];'`
echo $f

#with python
f=`python -c 'import sys; print sys.argv[1].split(".")[0]' $foo`
echo $f