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The basename esh plug in
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Name: basename

Usage: basename path (where path is something like /home/studentName)

The 'basename' plug-in provides	basename expansion for esh which strips	directories and	suffixes from filenames.

When the shell receives the basename command, it first checks to make sure that a path is provided.  
If it hasn't, an appropriate error message appears.  If	a path is given, the function separates	the path by the character
'/' and	puts it	into a character array.	 The function then sets	each of	these parts of the path	to NULL in order to 
leave only the name of the file.

Written	By Amanda Kahn <ajgkahn> and Kaity Blohm <kaity>