#!/bin/sh
##  Print one line summaries in a manner similar to 'help' or 'apropos'.
##  but allow grep regular expressions.
##  Does not make use of MANPATH although it should.

for i    ## i is a variable whose value $i is each argument in succession
do
	## Print lines of windex file matching $i
		grep "$i" /usr/man/windex ||
	## If this grep fails to find something then say so (not standard)
		echo "$i": nothing appropriate    
done

## Note that the " are needed in the grep in case $i contains characters
## special to shell.  This is a distinct possiblity when patterns are involved,
## however, we don't use '$i'  because this would prevent the shell from
## expanding $i.