We sometimes need to see the contents of a sis file in order to know more about a particular software.
Here is a simple perl script to extract the contents of a sis file. Yes, no use of any software!!
Suppose the sis file has name "theFile.sis".
Type in terminal:- $perl unsis.pl theFile.sis ./
to extract in the current folder.
NOTE:- Make sure that the two files (SisFile.pm & unsis.pl) are in the same folder.
Download the two files from here.