From 1df435313418065be6eb6ab2f7aaf47b9a3876e6 Mon Sep 17 00:00:00 2001
From: KatolaZ <katolaz@freaknet.org>
Date: Mon, 23 Jul 2018 12:19:34 +0100
Subject: [PATCH] added further checks

---
 TODO   |  2 +-
 gosher | 52 ++++++++++++++++++++++++++++++++--------------------
 2 files changed, 33 insertions(+), 21 deletions(-)

diff --git a/TODO b/TODO
index 3d53072..51eba8e 100644
--- a/TODO
+++ b/TODO
@@ -1,5 +1,5 @@
+- use getopt
 - add chroot and privilege drop
 - allow on-the-fly creation of gopherfle from a folder (set it active
   through an option)
 
-
diff --git a/gosher b/gosher
index 668a2db..31e9abf 100755
--- a/gosher
+++ b/gosher
@@ -43,7 +43,7 @@ NETCAT="nc.openbsd"
 ### use named pipes (Does *not* work with original netcat!!!!!)
 STYLE='pipe'
 
-OPREFIX=/tmp/outf_
+### prefix of the input FIFO
 IPREFIX=/tmp/inf_
 
 DEBUG=
@@ -63,6 +63,8 @@ cleanup(){
 }
 
 MYNAME=$(basename $0)
+MYDIR=$(dirname $(realpath $0))
+NETCAT=$(which $NETCAT)
 
 if [ -z "${MYNAME#gosher}" ]; then
 	## we are called as gosher -- launch the server
@@ -70,28 +72,38 @@ if [ -z "${MYNAME#gosher}" ]; then
 	PORT=${1:-70}
 	GOPHERDIR=${2:-"./"}
 	
-	trap cleanup 0 HUP INT TRAP TERM QUIT
-	
-	INF=${IPREFIX}$$
-	[ "$STYLE" = "pipe" ] && {
-		mkfifo -m 600 $INF
-		while [ 1 -eq 1 ]; do
-			./gosher_serve ${GOPHERDIR} <$INF | ${NETCAT} -vvvvv -l -p ${PORT} >$INF
-		done
-		rm -f $INF
-		exit 0
-	}
-	[ "$STYLE" = 'fork' ] && {
-		while [ 1 -eq 1 ]; do
-			${NETCAT} -vv -l -p $PORT -c "~/gosher_serve ${GOPHERDIR}"
-		done
-		exit 0
+	[ ! -f "${NETCAT}" -o ! -x "${NETCAT}" ] && {
+		echo "Wrong NETCAT -- Exiting" >&2
+		exit 2
 	}
-	echo "Error!!! wrong STYLE specified!!!" >&2
-	exit 1
+	
+	if [ -f "${MYDIR}/gosher_serve" -o -h "${MYDIR}/gosher_serve" ]; then
+		GOSHER_SERVE="${MYDIR}/gosher_serve"
+		trap cleanup 0 HUP INT TRAP TERM QUIT
+	
+		INF=${IPREFIX}$$
+		[ "$STYLE" = "pipe" ] && {
+			mkfifo -m 600 $INF
+			while [ 1 -eq 1 ]; do
+				${GOSHER_SERVE} ${GOPHERDIR} <$INF | ${NETCAT} -vvvvv -l -p ${PORT} >$INF
+			done
+			rm -f $INF
+			exit 0
+		}
+		[ "$STYLE" = 'fork' ] && {
+			while [ 1 -eq 1 ]; do
+				${NETCAT} -vv -l -p $PORT -c "${GOSHERSERVE} ${GOPHERDIR}"
+			done
+			exit 0
+		}
+		echo "Wrong STYLE specified -- Exiting" >&2
+		exit 2
+	else
+		echo "Cannot find gosher_serve -- Exiting">&2
+		exit 3
+	fi
 fi
 
-
 ######################
 
 ##