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From: thomas@utah-gr.UUCP (Spencer W. Thomas)
Newsgroups: net.unix
Subject: Re: mkcmd.c (in net.sources) alternate approach
Message-ID: <1139@utah-gr.UUCP>
Date: Tue, 10-Jul-84 12:53:47 EDT
Article-I.D.: utah-gr.1139
Posted: Tue Jul 10 12:53:47 1984
Date-Received: Thu, 12-Jul-84 01:13:26 EDT
References: <237@scc.UUCP>
Organization: Univ of Utah CS Dept
Lines: 29

Actually, Don, your second example can be done much more easily in csh
than you show (it's funny how we stick with the idioms we originally
learned, even when they're not appropriate).

> # rename *.ftn *.ft4
>
>	foreach i (*.ftn)
>	? mv $i `basename $i ftn`ft4
>	? end

The 'mv' line can be done more efficiently as
	? mv $i $i:r.ft4

In fact, the csh provides a whole set of modifiers for collecting parts
of file names
	$i:h	"Head" - strips the last component off the path.
	$i:t	"Tail" - returns the last component of the path.
	$i:r	"Root" - strips the part after the last '.' off the filename
			 (or path)
	$i:e	"Extension" - just the part after the '.' (this may be new,
		I don't remember it before).

Examples of use (suppose $i contains '/a/b/d.c')
	echo $i:h   ->   /a/b
	echo $i:t   ->   d.c
	echo $i:r   ->   /a/b/d
	echo $i:e   ->   c

=Spencer