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add Bfn script

--- /dev/null

+++ b/bin/Bfn

@@ -1,0 +1,16 @@

+#!/bin/rc

+if(! ~ $#* 1){

+	echo usage: $0 fn >[2=1]

+	exit usage

+}

+res=`{grep -n '^'$1'\(' *.c | sed -n 's/^([^:]*:[^:]*).*$/\1/gp' }

+ifs='

+'

+for(i in $res)

+	echo $i

+switch($#res){

+case 0

+	echo $1: not found >[2=1]

+case 1

+	plumb $res

+}

-- 

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