X-Git-Url: https://iankelling.org/git/?a=blobdiff_plain;f=switch-mail-host;h=c67f30635570876f499860e3a98f0c69aaeb4a53;hb=e256742f75e1127266e4ce1e2a871a81a72bc84a;hp=5d7a6793388dd76b181b5b893eae590c4f1b1fdb;hpb=fbb0315374736f92d950545796beaa79cbdc1f49;p=distro-setup

diff --git a/switch-mail-host b/switch-mail-host
index 5d7a679..c67f306 100755
--- a/switch-mail-host
+++ b/switch-mail-host
@@ -11,6 +11,7 @@ Adjust home network dns so NEW_HOST resolves locally if it is on the
 local network.  Turn off mail receiving on OLD_HOST, run btrbk to move
 mail to NEW_HOST, turn on mail receiving on NEW_HOST.
 
+-o         Only btrbk /o, instead of all filesystems.
 -w         Don't try to ssh to wrt. Should only be used in unusual network situation.
 -h|--help  Print help and exit.
 
@@ -23,9 +24,11 @@ EOF
 
 update_wrt=true # default
 temp=$(getopt -l help wh "$@") || usage 1
+mp_args=
 eval set -- "$temp"
 while true; do
   case $1 in
+    -o) mp_args="-m /o"; shift ;;
     -w) update_wrt=false; shift ;;
     -h|--help) usage ;;
     --) shift; break ;;
@@ -65,16 +68,6 @@ if [[ ! $new_host || ! $old_host ]]; then
   exit 1
 fi
 
-# TODO: turn this home dns update into a separate script that also runs
-# as a cronjob for the MAIL_HOST, so it can update dns for a laptop that
-# moves to a different network.
-#
-# This exists because if mail_host is on the home network with a vpn
-# tunnel, and another host on the home network tries to connect to the
-# public tunnel ip, it won't work because from the public machine's
-# perspective, due to nat, both home network machines have the same
-# ip. We could solve this by using ipv6 addresses, but not all networks
-# i'm on with more than one machine are ipv6 enabled.
 at_home=false
 if timeout -s 9 5 ssh-keyscan -p 2220 -t rsa 10.0.0.1 2>/dev/null | grep -qFx '[10.0.0.1]:2220 ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCH+/h1dGEfKEusBblndU2e6QT4wLCm5+yqr/sqh/0X9YfjR7BfWWm8nNmuP55cYc+Wuf5ljB1H1acXEcsl1y8e0j3agHfF0V74FE1N1zz5nn2Ep8NHnmqgEhza38ZxMPh+4p3X7zklEKU7+3SzybKBi8sg0wLzlS2LM0JaUN80zR2sK11Kye3dURUXPk78u5wodOkgcEYRwSYaDMJlUzWP+poRXIDJwFaMQnwmxbl/c84yOyaU0x/d6hFwoRscWecihX+vvBNeSyxR4xr2HDOyUWwJkctyAgt2p7w3tfkXOKcCRzTAjGVIMQLTvo0sG/yJbcyHoEFdFybCsgDvfyYn'; then
   at_home=true
@@ -133,27 +126,28 @@ if mountpoint -q /m; then sudo umount /m; fi
 if mountpoint -q /o; then sudo umount /o; fi
 EOF
 
-# if new_host is not on home network, make mail.iankelling.org not resolve
-# on the home network.
-if [[ $new_host == $HOSTNAME ]] && ! $at_home; then
-  echo | $wrt_shell cedit mail_host /etc/hosts || [[ $? == 1 ]] # 1 means file changed.
-else
-  $wrt_shell bash -xs $new_host <<'EOFOUTER'
-new_host=$1
-cedit mail_host /etc/hosts <<EOF || /etc/init.d/dnsmasq restart
-$(grep "\b$new_hostname\b" /etc/hosts | awk '{print $1}') mail.iankelling.org
-EOF
-EOFOUTER
-fi
+# previously, I was checking to see if the new mail host
+# is on my home network, then changing my home dns
+# to resolve on the local network, so that I didnt
+# have to send traffic out to the internet or rely
+# on that. However, that breaks for a laptop that roams.
+# So, we could have a cronjob that updates that dns,
+# however, another solution is to just use ipv6,
+# and I prefer that.
+#
+# TODO: enable ipv6 for email. exim config setting disables it.
+# need to add vpn support. need to add firewall / routing.
+# I think exim will try ipv6 first, so no need to disable
+# ipv6 i think.
 
 $old_shell primary-setup $new_hostname
 
 /a/bin/distro-setup/install-my-scripts
 
 if $localhost_new; then
-  btrbk-run -s $old_host -m /o
+  btrbk-run -s $old_host $mp_args
 else
-  btrbk-run -t $new_host -m /o
+  btrbk-run -t $new_host $mp_args
 fi
 
 $new_shell primary-setup $new_hostname