From c8b05198d89f026d13a577f57d2dda8cb608a3be Mon Sep 17 00:00:00 2001
From: Niki Roo <niki@nikiroo.be>
Date: Sat, 5 Aug 2017 23:55:04 +0200
Subject: [PATCH] Simple script to start a gopher "server" - it will listen on
 a port, then call another program to handle the connection - can be used to
 test some things or for a simple 7 (search) service in Bash

---
 gopher.sh | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 gopher.sh

diff --git a/gopher.sh b/gopher.sh
new file mode 100644
index 0000000..d0c9ea5
--- /dev/null
+++ b/gopher.sh
@@ -0,0 +1,47 @@
+#!/bin/sh
+
+# $0 [prog ($1 will be the query)] ([port])
+
+[ "$ADDR"    = "" ] && ADDR=127.0.0.1
+[ "$LOG"     = "" ] && LOG=/tmp/log.err
+[ "$PIDF"    = "" ] && PIDF="`mktemp`"
+[ "$TIMEOUT" = "" ] && TIMEOUT=10
+[ "$MAXCON"  = "" ] && MAXCON=1024
+prog="$1"
+port="$2"
+[ "$port"    = "" ] && port=70
+
+if [ "$prog" = "" ]; then
+	rm "$PIDF"
+	echo "Syntax: $0 [prog (\$1 will be the query)] ([port])" >&2
+	exit 1
+fi
+
+tmpd=`mktemp -t -d .gopher-service.XXXXXX`
+if [ ! -d "$tmpd" ]; then
+	rm "$PIDF"
+	echo "Cannot create temporary directory, aborting..." >&2
+	exit 2
+fi
+
+touch "$PIDF"
+echo "$PIDF"
+
+i=0
+while [ -e "$PIDF" ]; do
+	i=`expr $i + 1`
+	[ $i -gt "$MAXCON" ] && i=1
+	fifo="$tmpd/fifo.$i"
+	rm -f "$fifo"
+	mkfifo "$fifo"
+	< "$fifo" nc -l -q0 -w"$TIMEOUT" "$ADDR" -p "$port" | (
+		read -r query
+		query="`echo "$query" | cut -f2 -d'	'`"
+		(
+			"$prog" "$query" 2>> "$LOG"
+			rm "$fifo"
+		)&
+	) > "$fifo"
+done
+rm -rf "$tmpd"
+
-- 
2.27.0