/*
 * FILES script -- complements the new file functions.
 * Written by Jeremy Nelson -- EPIC project
 *
 * These aliases are not anywhere near as fast as /exec'ing the
 * c programs, but they are here to illustrate the usage of the fns.
 */

/* dump a file out to the screen w/o using /exec */
alias cat {
	@ fd = open($0 R)
	while (!eof($fd)) { echo $read($fd) }
	@ close($fd)
}

/* Search for a string in a group of files */
/* This is, of course, case insensitive */
alias grep {
	for x in ($1-) {
		@ fd = open($x R)
		while (!eof($fd)) { 
			@ line = read($fd)
			if (match(*$0* $line))
				{echo $x: $line}
		}
		@close($fd)
	}
}

/* Write a line to a file w/o using the logging features */
alias log_it {
	@ fd = open($0 W)
	@ write($fd $1-)
	@ close($fd)
}

# 
# Call as /exclude filename pattern
#
alias exclude { 
        @ :reg = regcomp($1-)
        @ :rd = open($0 R)
        @ :wd = open($0.new W)
        
	@ line = read($rd)
	do
        {       
                if (regexec($reg $line)) {
                        @ write($wd $line)
                }
		@ line = read($rd)
        } while (!eof($rd))

        @ close($rd)
        @ close($wd)
        @ regfree($reg)
                       
        @ unlink($0)
        @ rename($0.new $0)
}                          


.