From e2691276b462b62a625adc7235fad4f36f581840 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20=C5=A0koudlil?= <skoudmar@fel.cvut.cz>
Date: Wed, 27 Apr 2022 11:16:15 +0200
Subject: [PATCH] Added untar command to extract root filesystem tarball
 uploaded by rsync-nfsroot

---
 server/novaboot-shell | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/server/novaboot-shell b/server/novaboot-shell
index 7666917..ec34696 100755
--- a/server/novaboot-shell
+++ b/server/novaboot-shell
@@ -199,6 +199,18 @@ run_subcommand() {
 	    cd "$HOME/nfsroot/${NB_USER:?}"
 	    shift
 	    exec rsync "$@";;
+	"untar "*)
+	    # untar command is used to extract root filesystem tarball.
+	    mkdir -p "$HOME/nfsroot/${NB_USER:?}"
+	    cd "$HOME/nfsroot/${NB_USER:?}"
+	    if ! [ $# -eq 2 -a "$2" -ef $(basename "$2") ]; then
+		die "Unexpected untar invocation: $*"
+	    fi
+	    # remove the old contents
+	    rm -rf root
+        mkdir root
+
+	    exec tar -xvf "$2" -C root;;
 	"on")
 	    power on
 	    exit;;