host info updates

[distro-setup] / rootsshsync

diff --git a/rootsshsync b/rootsshsync
index 900a6628aa3979784844433c30efabb3a0807f45..4767c7d54b76f7dd44d1077498cfd923968ce07d 100755 (executable)
--- a/rootsshsync
+++ b/rootsshsync
@@ -1,5 +1,12 @@
 #!/bin/bash
-# Copyright (C) 2016 Ian Kelling
+# I, Ian Kelling, follow the GNU license recommendations at
+# https://www.gnu.org/licenses/license-recommendations.en.html. They
+# recommend that small programs, < 300 lines, be licensed under the
+# Apache License 2.0. This file contains or is part of one or more small
+# programs. If a small program grows beyond 300 lines, I plan to switch
+# its license to GPL.
+
+# Copyright 2024 Ian Kelling
 
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -13,6 +20,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+
 set -eE -o pipefail
 trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
 
@@ -38,7 +46,7 @@ find $user_ssh_dir -xtype l -exec rm '{}' \;
 # -t times, so it won't rewrite the file every time,
 # -L resolve links
 rsync --exclude=/h --exclude=/h.pub \
- --exclude=/hrsa --exclude=/hrsa.pub \
+      --exclude=/hrsa --exclude=/hrsa.pub \
       --exclude /config --exclude /confighome -rtL --delete $user_ssh_dir/ /root/.ssh
 if [[ -e /q/root/h ]]; then
   cp -a /q/root/{h,hrsa}{,.pub} /root/.ssh
@@ -59,7 +67,9 @@ if [[ -e $user_ssh_dir/config ]]; then
 fi
 chown -R root:root /root/.ssh
 
-rsync -t --chmod=755 --chown=root:root /a/bin/ds/hssh /usr/local/bin
+# --update, -u             skip files that are newer on the receiver
+# I often push out a new hssh
+rsync -tpu --chmod=755 --chown=root:root /a/bin/fai/fai/config/files/usr/local/bin/hssh/IANK /usr/local/bin/hssh
 
 if [[ -e /a/opt/btrbk/ssh_filter_btrbk.sh ]]; then
   install /a/opt/btrbk/ssh_filter_btrbk.sh /usr/local/bin
@@ -69,14 +79,19 @@ if [[ -e /etc/systemd/system/ssh-agent-root.service ]]; then
   systemctl enable --now ssh-agent-root
 fi
 
-d=/etc/initramfs-tools
-if [[ -e $d ]] && ! diff -q /root/.ssh/authorized_keys $d/root/.ssh/authorized_keys &>/dev/null; then
-  mkdir -p $d/root/.ssh /etc/dropbear-initramfs
-  chmod 700 $d/root $d/root/.ssh
-  cp -p /root/.ssh/authorized_keys $d/root/.ssh/authorized_keys
-  cp -p /root/.ssh/authorized_keys /etc/dropbear-initramfs
-  if [[ -e /root/.ssh/authorized_keys2 ]]; then
-    cat /root/.ssh/authorized_keys2 >>/etc/dropbear-initramfs
-  fi
+
+# note: i previously had $auth_dir/root/.ssh/authorized_keys
+# but /usr/share/doc/dropbear-initramfs/README.initramfs
+# says differently. not sure what is up.
+
+auth_dir=/etc/dropbear/initramfs/
+candidate=$(apt-cache policy dropbear-initramfs | awk '$1 == "Candidate:" { print $2 }' | head -n1 ||:)
+if [[ $candidate ]] && dpkg --compare-versions "$candidate" lt 2020.81-4; then
+  auth_dir=/etc/dropbear-initramfs
+fi
+auth_file=$auth_dir/authorized_keys
+mkdir -p $auth_dir
+if [[ ! -e $auth_file ]] || ! diff -q /root/.ssh/authorized_keys $auth_file; then
+  cp -p /root/.ssh/authorized_keys $auth_file
   update-initramfs -u -k all
 fi