#!/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

# new version: fixes awk scripts too

rc=`{whatis rc}
awk=`{whatis awk}
firstline='#!'$"rc
firstline_awk='#!'$"awk' -f'

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
	}
	if not if(sed 1q $file | grep '^#!/.*[/	 ]awk[ 	]+-f$' > /dev/null) {
		{
			echo 1c
			echo $firstline_awk
			echo .
			echo wq
		} | ed $file > /dev/null
	}
}