Stripping off extensions for decompress() function

From: Michael Kipper (mkipper_at_rogers.com)
Date: 01/08/04 

Date: Thu, 08 Jan 2004 01:52:29 GMT

Hello,

I am trying to write a decompress() function, which will untar a file into
/usr/src, regardless of the archive type
I'm new to bash, so if someone will help me translate this pseudocode
to bash script, that would be great:

decompress()
{
extension=`somefunction $1`
if (extension == "tar.gz") then
            tar -zxf filename
else if (extension == "tar.bz2") then
            tar -jxf filename
else if (extension == "bz2") then
            bunzip2 filename
else if (extension == "gz") then
            gunzip filename
}

There must be some function to do this properly, like `basename` or
something like it. Also, if there's a better way to do this, by all
means...

Thanks,

Michael Kipper
Toronto, Ontario

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