fix on nc invocation and several fixes on regexp

gosher

@@ -45,8 +45,8 @@
 ### ncat (from nmap)
 ##NETCAT="ncat"
 ##
-### Openbsd netcat
-NETCAT="nc.openbsd"
+### OpenBSD netcat
+NETCAT="nc"
 
 ##
 ## STYLE: The way in which netcat will talk to gosher_serve
@@ -65,8 +65,7 @@ DEBUG=
 
 
 [ -n "$DEBUG" ] && {
-	set -e
-	set -x
+	set -e -x
 }
 
 
@@ -77,7 +76,7 @@ cleanup(){
 }
 
 MYNAME=$(basename "$0")
-MYDIR=$(dirname "$(realpath "$0")")
+MYDIR=$(dirname "$(readlink -f "$0")")
 NETCAT=$(which "$NETCAT")
 
 if [ -z "${MYNAME#gosher}" ]; then
@@ -103,7 +102,7 @@ if [ -z "${MYNAME#gosher}" ]; then
 # shellcheck disable=SC2094
 				${GOSHER_SERVE} "${GOPHERDIR}" \
 				   "${HOSTNAME}" "${PORT}" <"$INF" |\
-				    ${NETCAT} -vvvvv -l -p "${PORT}" >"$INF"
+				    ${NETCAT} -vvvvv -l "${HOSTNAME}" "${PORT}" >"$INF"
 			done
 			rm -f $INF
 			exit 0
@@ -164,13 +163,13 @@ serve_index(){
 
 	echo "[$(date +%Y-%m-%d\ %H:%M:%S)|GPH|${IDX}|\"\"]" >&2
         while read -r line; do
-                rline=$(echo "$line" | sed -r -e 's/\r//g')
+                rline=$(echo "$line" | tr -d '\r')
                 case "$rline" in
                         '['*)
-                                echo "$rline" | sed -r -e 's/\[//g;s/\]//g;s/\|/\t/g;s/\t//;s/$/\r/g'
+                                echo "$rline" | sed -r -e 's/\[//g;s/\]//g;s/\|/	/g;s/	//;s/$/\r/g'
                         ;;
                        t*)
-                               echo "$rline" | cut -c 2-
+				echo "$rline" | cut -c 2-
                        ;;
                         *)
                                 echo "$line"
@@ -240,7 +239,7 @@ PORT=${3:-"70"}
 
 read -r selector
 
-selector=$(echo "$selector" | sed -r 's:\$.*::g;s:\r::g' )
+selector=$(echo "$selector" | tr -d '\r' )
 
 [ -n "$DEBUG" ] && {
 	echo "iGOPHERDIR: ${GOPHERDIR}"
@@ -258,10 +257,10 @@ case $selector in
 		script_name=$(echo "$selector" | cut -d "?" -f 1)
 		query_string=$(echo "$selector" | cut -d "?" -f 2)
 		[ "${script_name}" = "${query_string}" ] && query_string=""
-		RP1=$(realpath "${GOPHERDIR}""${script_name}" || "")
+		RP1=$(readlink -f "${GOPHERDIR}""${script_name}" || "")
 # shellcheck disable=SC2181
 		[ $? -eq 0 ] || invalid_selector "${selector}"
-		RP2=$(realpath "${GOPHERDIR}")"${script_name}"
+		RP2=$(readlink -f "${GOPHERDIR}")"${script_name}"
 		RP2=$(echo "${RP2}" | sed -r 's/\/+/\//g')
 # shellcheck disable=SC2181
 		[ $? -eq 0 ] || invalid_selector "${selector}"
@@ -279,10 +278,10 @@ case $selector in
 	;;
 	/?*|"")
 		## it's a regular selector
-		RP1=$(realpath "${GOPHERDIR}"/"${selector}" || "")
+		RP1=$(readlink -f "${GOPHERDIR}"/"${selector}" || "")
 # shellcheck disable=SC2181
 		[ $? -eq 0 ] || invalid_selector "$selector"
-		RP2=$(realpath "${GOPHERDIR}")"${selector}"
+		RP2=$(readlink -f "${GOPHERDIR}")"${selector}"
 # shellcheck disable=SC2181
 		[ $? -eq 0 ] || invalid_selector "$selector"
 		[ -n "$DEBUG" ] && {

gosher.8

@@ -9,20 +9,17 @@
 .Nm gosher
 .Op Ar GOPHERDIR Op Ar HOSTNAME Op Ar PORT
 .Sh DESCRIPTION
-.Pp
-.Ic gosher 
+.Nm
 is a server for the Gopher protocol (RFC 1436) in a POSIX shell
 script.
-
 .Pp
 Gopher is a textual protocol for information exchange over the Internet,
-that provides a unified hierarchical menu-based interface. The Gopher
-protocol has assigned port 70 by IANA.  
-
+that provides a unified hierarchical menu-based interface.
+The Gopher protocol has assigned port 70 by IANA.
 .Pp
-.Ic gosher
+.Nm
 uses
-.Em netcat(1)
+.Xr nc 1
 to listen for incoming connections on the specified
 .Ar HOSTNAME
 (defaults to 'localhost' if not specified) and
@@ -32,33 +29,21 @@ to listen for incoming connections on the specified
 is not specified) and makes available all the files under the folder
 .Ar GOPHERDIR
 (defaults to the current directory if not specified).
-
-
-
-.\" This next request is for sections 1, 6, 7 & 8 only
-.\".Sh ENVIRONMENT
-
-
-.\".Sh EXAMPLES
-.\" This next request is for sections 1, 6, 7 & 8 only
-.\"     (command return values (to shell) and
-.\"       fprintf/stderr type diagnostics)
-
-.\" .Sh DIAGNOSTICS
 .Sh SEE ALSO
-lynx(1), gopher(1), sacc(1), clic(1)
-.\" .Sh CONFORMING TO
-.\" .Sh HISTORY
+.Xr clic 1 ,
+.Xr gopher 1 ,
+.Xr lynx 1 ,
+.Xr sacc 1 ,
 .Sh AUTHORS
-.Ic gosher 
+.Nm
 is Free Software, distributed under the terms of the GNU
 General Public License (GPL), version 3 of the License.
 .Pp
-.Ic gosher 
+.Nm
 is copyleft (c) 2018 by
-.An Vincenzo (KatolaZ) Nicosia <katolaz@freaknet.org>
-
+.An Vincenzo (KatolaZ) Nicosia Aq Mt katolaz@freaknet.org
 .Sh SECURITY CONSIDERATIONS
 It is recommended to run
-.Ic gosher
-under chroot(8).
+.Nm
+under
+.Xr chroot 8 .