initial import of changes from 9front bikeshedding; bundle rc-httpd

bin/contrib/rc-httpd/handlers/cgi

@@ -0,0 +1,46 @@
+#!/bin/rc
+fn filter_headers{
+	response=(200 OK)
+	lines=''
+	done=false
+	while(~ $done false){
+		line=`{getline}
+		head=`{echo $line | awk '{print tolower($1)}'}
+		if(~ $head status:*)
+			response=`{echo $line | awk '{$1="" ; print}'}
+		if not if(~ $line '')
+			done=true
+		if not
+			lines=$"lines^$"line^$cr^'
+'
+	}
+	echo 'HTTP/1.1' $"response^$cr
+	echo -n $"lines
+	do_log $response(1)
+}
+
+fn run_cgi {
+	path=$cgi_path exec $"cgi_bin $params || echo 'Status: 500'
+}
+
+cgi_bin=$1
+cgi_dir=.
+if(! ~ $#* 1)
+	cgi_dir=$*($#*)
+if not if(~ $"cgi_bin /*){
+	cgi_dir=`{basename -d $"cgi_bin}
+	cgi_dir=$"cgi_dir
+}
+if(! ~ $"cgi_bin */*)
+	cgi_bin=./$"cgi_bin
+if(! builtin cd $"cgi_dir >[2]/dev/null || ! test -x $"cgi_bin){
+	error 500
+	exit
+}
+
+run_cgi | {
+	filter_headers
+	emit_extra_headers
+	echo $cr
+	exec cat
+}