infinite loop

burrow

@@ -1,14 +1,19 @@
 #!/bin/sh
 
-### read from $1 and print on stdout a list of DIR selectors
-### one per line, terminated by a line with ".\r\n"
+### read from $1 and print on stdout a list of MENU selectors IDs
+### in the format:
+###
+### 1|SELECTOR|HOST|PORT|SHA256
+###
+### where SHA256 is the SHA256SUM of "1|SELECTOR|HOST|PORT"
+###
 ## function
 get_dirs(){
+	src_id="$1"
 	OLDIFS=$IFS
 	#IFS=$'\t\n'
-##	IFS="$(echo t | tr t \\t)
-##"
 	IFS="|"
+	src_dir=$(echo "${src_id}" | cut -c -2)
 	while read name sel host port; do
 ##		echo " --- name: \"$name\""
 ##		echo " --- sel: \"$sel\""
@@ -17,19 +22,52 @@ get_dirs(){
 		TYPE=$(echo "$name" | cut -c 1)
 ##		echo " --- TYPE \"$TYPE\""
 ##		echo "$TYPE, $name, $sel, $host, $port"
+		port=$(echo $port | sed -r -e 's/\r//g')
+		dir_id=$(echo "${TYPE}|${sel}|${host}|${port}" | sed 's/^1||/1|\/|/g')
+		dest_id=$(echo "${dir_id}" | sha256sum | cut -d " " -f 1 )
+		echo "${src_id}" "${dest_id}" >&2
 		[ "${TYPE}" = "1" ] && {
-			port=$(echo $port | sed -r -e 's/\r//g')
-			dir_id=$(echo "${TYPE}|${sel}|${host}|${port}" | sed 's/^1||/1|\/|/g')
-			sid=$(echo "${dir_id}" | sha256sum | cut -d " " -f 1 )
-			echo "${dir_id}|${sid}"
+			echo "${dir_id}|${dest_id}" | tee -a ${src_dir}/${src_id}
 		}
 	done 
-	IFS=$OLDIFS
+	IFS="$OLDIFS"
 }
 
 
-FIN=${1:-"/dev/stdin"}
-SRC="$2"
+### get a MENU selector ID (as generated by get_dirs) and retrieves it
+### from the gopherspace
+### 
+## function
+retrieve_selector(){
+	sel="$1"
+	SEL=$(echo "$1" | cut -d "|" -f 2)
+	HOST=$(echo "$1" | cut -d "|" -f 3)
+	PORT=$(echo "$1" | cut -d "|" -f 4)
+	printf "${SEL}\r\n" | netcat -w 15 "${HOST}" "${PORT}"
+
+}
+
+###
+### Check if a given selector has been visited. In that case, just
+### output the corresponding file (which contains all the outgoing links 
+### of the selector) and exits
+###
+## function
+check_selector_present(){
+	sel_id="$1"
+	sel_dir="$(echo ${sel_id} | cut -c -2)"
+	[ -d "${sel_dir}" -a -f "${sel_dir}/${sel_id}" ] && cat ${sel_dir}/${sel_id} && echo ${sel_id}>>present && exit 1
+	[ ! -d "${sel_dir}" ] && mkdir -p "${sel_dir}"
+}
+
+
+SRC="$1"
+
+src_id=$(echo "$SRC" | cut -d "|" -f 5 )
+
+check_selector_present "${src_id}"
 
-cat "$FIN" | sed -r -e 's/\t/|/g' | get_dirs
+echo "selector ${src_id} not found" >> logfile.txt
 
+retrieve_selector "$SRC" | sed -r -e 's/\t/|/g' | get_dirs "${src_id}"
+