#!/usr/local/plan9/bin/rc

# Fix rc shell scripts to find rc without launching env every time.
# Invoke with rc and plan9 versions of grep and ed in $PATH

# If your system lacks which (e.g. some gnu/linux)
# substitute the full path to rc in this line:
rc=/usr/local/plan9/bin/rc
firstline='#!'$"rc

if(~ $#* 0)	files = *
if not	files = $*

myname = `{basename $0}

for(file in $files) {
	if(test -d $file) $0 $file/*
	if not if(~ $file *$myname) {}
	if not if(sed 1q $file | grep '^#!/.*[/	 ]rc$' > /dev/null) {
		{
			echo 1c
			echo $firstline
			echo .
			echo wq
		} | ed $file > /dev/null
	}
}