initial commit.

diff --git a/broadsync b/broadsync
new file mode 100755 (executable)
index 0000000..206794b
--- /dev/null
+++ b/broadsync
@@ -0,0 +1,112 @@
+#!/bin/bash
+
+BROADSYNCDIR=~/.broadsync
+SYNCLINEFILE="synclines"
+
+function returnnewer {
+    fctime=$(stat -c %Y "$1")
+    if [ -z "$2" ] || [ $fctime -gt $2 ]; then
+       echo $fctime
+    else
+       echo $2
+    fi
+}
+
+if [ ! -d "$BROADSYNCDIR" ]; then
+    mkdir "$BROADSYNCDIR" || exit 1
+    echo "Created directory $BROADSYNCDIR."
+fi
+
+if [ ! -f "$BROADSYNCDIR/$SYNCLINEFILE" ]; then
+    touch "$BROADSYNCDIR/$SYNCLINEFILE" || exit 1
+    chmod 600 "$BROADSYNCDIR/$SYNCLINEFILE" || \
+       rm "$BROADSYNCDIR/$SYNCLINEFILE"
+    echo "# line format:
+# user:password:port:/remote_directory:/local_directory" > \
+    "$BROADSYNCDIR/$SYNCLINEFILE"
+    echo "Created syncline file $BROADSYNCDIR/$SYNCLINEFILE."
+fi
+
+if [ $(cat "$BROADSYNCDIR/$SYNCLINEFILE" | grep -v "#" | wc -l) -eq 0 ]; then
+    echo "Your syncline file $BROADSYNCDIR/$SYNCLINEFILE is empty."
+    echo "You have to add at least one syncline to run broadsync!"
+fi
+
+tmpdir="$(mktemp -p /tmp -d broadsync-XXXXXXX)" || exit 1
+
+subnets=$(ip addr | \
+    sed -En 's/.*inet (([0-9]*\.){3}[0-9]*)\/.*/\1/p' | \
+    grep -v '127.0.0.1' | \
+    sed -En 's/(([0-9]*\.){3})[0-9]*/\1/p')
+
+echo "Subnets to probe: $(echo "$subnets" | tr '\n' ' ')"
+
+while read syncline; do
+    syncline_user=$(echo "$syncline" | cut -f1 -d":")
+    syncline_pass=$(echo "$syncline" | cut -f2 -d":")
+    syncline_port=$(echo "$syncline" | cut -f3 -d":")
+    syncline_rdir=$(echo "$syncline" | cut -f4 -d":")
+    syncline_ldir=$(eval echo "$(echo "$syncline" | cut -f5 -d":")")
+
+    syncline_hash=$(echo "$syncline_user:$syncline_port:$syncline_rdir" | \
+       md5sum | cut -f1 -d" ")
+
+    echo "Processing syncline $syncline_user:$syncline_port:$syncline_rdir"
+
+    if [ ! -d "$syncline_ldir" ]; then
+       echo "Creating local syncdir $syncline_ldir"
+       mkdir "$syncline_ldir" || exit 1
+    fi
+
+    statdir="$BROADSYNCDIR/$syncline_hash.stat"
+    if [ ! -d "$statdir" ]; then
+       echo "Creating statdir $statdir"
+       mkdir "$statdir" || exit 1
+    fi
+
+    if [ -f "$statdir/newestdate" ]; then
+       newestdate=$(cat "$statdir/newestdate")
+       echo "Using newestdate $(date +"%T %B %d %Y" -d @$newestdate)"
+    else
+       newestdate=0
+    fi
+
+    for subnet in $subnets; do
+       echo "Scanning for potential hosts in subnet $subnet"
+
+       for i in $(seq 1 254); do
+           (nc -w 5 -z "$subnet$i" "$syncline_port"; echo $? > "$tmpdir/nc-$subnet-$i") &
+       done
+       wait
+
+       for i in $(seq 1 254); do
+           if [ $(cat "$tmpdir/nc-$subnet-$i") -eq 0 ]; then
+               echo "Trying to sync with potential host $subnet$i"
+
+               while read logline; do
+                   [ -n "$lastfile" ] && newestdate=$(returnnewer "$syncline_ldir/$lastfile" "$newestdate")
+                   echo $logline
+
+                   file=$(echo "$logline" | sed -En 's/Transferring file .(.*)./\1/p')
+                   if [ -n $file ]; then
+                       lastfile="$file"
+                   else
+                       lastfile=""
+                   fi
+               done < <(lftp -p "$syncline_port" \
+                   -u "$syncline_user,$syncline_pass" \
+                   -e "mirror -v -N \"$(date +"%T %B %d %Y" -d @$newestdate)\" \"$syncline_rdir\" \"$syncline_ldir\"" \
+                   "$subnet$i")
+
+               [ -n "$lastfile" ] && newestdate=$(returnnewer "$syncline_ldir/$lastfile" "$newestdate")                
+           fi
+       done
+    done
+
+    echo $newestdate > "$statdir/newestdate"
+    
+done < <(cat "$BROADSYNCDIR/$SYNCLINEFILE" | grep -v '#')
+
+rm -r "$tmpdir"
+
+exit 0