fix btrbk service

[distro-setup] / rootsshsync

diff --git a/rootsshsync b/rootsshsync
index baf42967acf4e465b0752a46f454d2422550afbc..90928c669d922f72abc55562d5d7a1e943def725 100755 (executable)
--- a/rootsshsync
+++ b/rootsshsync
@@ -16,11 +16,29 @@
 set -eE -o pipefail
 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
 
-if sudo test -e /q/root/.ssh; then
-    sudo /a/exe/lnf /q/root/.ssh /root
-else
-    sudo mkdir -p /root/.ssh
-    sudo chmod 700 /root/.ssh
+[[ $EUID == 0 ]] || exec sudo "$BASH_SOURCE" "$@"
+
+dest=/root/.ssh
+
+# leftover
+if [[ -L $dest ]]; then
+  rm $dest
+fi
+mkdir -p $dest
+chmod 700 $dest
+
+user_ssh_dir=$(eval echo ~${SUDO_USER:-$USER})/.ssh
+
+# remove broken links, or else rsync has error about them.
+find $user_ssh_dir -xtype l -exec rm '{}' \;
+# -t times, so it won't rewrite the file every time,
+# -L resolve links
+rsync -rtL --delete $user_ssh_dir/ $dest
+chown -R root:root /root/.ssh
+d=/etc/initramfs-tools
+if [[ -e $d ]] && ! diff -q /root/.ssh/authorized_keys $d/root/.ssh/authorized_keys &>/dev/null; then
+  mkdir -p /etc/initramfs-tools/root/.ssh
+  chmod 700 $d/root $d/root/.ssh
+  cp -p /root/.ssh/authorized_keys $d/root/.ssh/authorized_keys
+  update-initramfs -u -k all
 fi
-sudo cp -rL $(eval echo ~${SUDO_USER:-$USER})/.ssh/* /root/.ssh
-sudo chown -R root:root /root/.ssh