Mac OS X Tiger in a Nutshell

Differing Features

Table 4-2 is a sampling of features that differ between bash and tcsh, Mac OS X’s former default shell.

Table 4-2. Differences between the bash and tcsh shells

Meaning/action	bash	tcsh
Default prompt	$	%
Force redirection	>|	>!
Force append		>>!
Variable assignment	var = val	set var = val
Set environment variable	export var = val	setenv var val
Command substitution	$(command), ''	''
Number of arguments	$#	$#argv
Execute commands in file	. file	source file
End a loop statement	done	end
End case or switch	esac	endsw
Loop through variables	for/do	foreach
Sample if statement	if [$i -eq 5]	if ($i= =5)
End if statement	fi	endif
Set resource limits	ulimit	limit
Read from terminal	read	$<
Make a variable read-only	readonly	set -r
Show possible completions	Tab	Tab
Ignore interrupts	trap 2	onintr
Begin until loop	until/do	until
Begin while loop	while/do	while