local/bin/rshare: Init.

.local/bin/rshare

@@ -0,0 +1,64 @@
+#!/bin/sh
+
+PORT=8888
+CONFIG=$HOME/.config/rsync/rsync.conf
+CACHE_DIR=$HOME/.cache/rsyncd
+
+IP=$(ip addr | awk '/state UP/ {getline; getline; $0=$2; gsub(/\/.*/, "");print; exit}')
+
+usage () {
+	cat <<EOF>&2
+Usage: ${0##*/} PATH
+
+Startup an rsync daemon and share PATH as read-only under the 'files' module.
+Clients can sync with, for instance:
+
+  rsync -iavzzP rsync://$IP:$PORT/files
+
+Options:
+
+  -p PORT: Specify a port number (default: $PORT).
+           Must be above 1024 to run without privileges.
+EOF
+}
+
+while getopts ":hp:" opt; do
+	case $opt in
+	h)
+		usage
+		exit ;;
+	p)
+		PORT="$OPTARG" ;;
+	\?)
+		usage
+		exit 1 ;;
+	esac
+done
+
+shift $(($OPTIND - 1))
+
+[ $# -ne 1 ] && usage && exit 1
+[ "$1" = "-h" ] && usage && exit
+[ "$1" = "--" ] && shift
+
+mkdir -p "$(dirname "$CONFIG")" "$CACHE_DIR"
+
+TARGET=$(realpath "$1")
+
+cat<<EOF>"$CONFIG"
+pid file = $CACHE_DIR/rsyncd.pid
+lock file = $CACHE_DIR/rsyncd.lock
+log file = $CACHE_DIR/rsyncd.log
+port = $PORT
+use chroot = false
+
+[files]
+path = $TARGET
+comment = Rsync share
+read only = true
+timeout = 300
+
+EOF
+
+rsync --daemon --config="$CONFIG" && \
+	echo "rsync daemon listening on $IP:$PORT"