X-Git-Url: https://iankelling.org/git/?a=blobdiff_plain;f=switch-mail-host;h=180b963c6b2f1da82955406864d74f217ebf9292;hb=8d29de95be2b44cac6e2cc3d0643f542be05e4bd;hp=4e8dfdece189e4080966d72e18ed5e025bc93c18;hpb=72c18f3a6a7f1ed0ca16af654a1f804ab96e1ff9;p=distro-setup

diff --git a/switch-mail-host b/switch-mail-host
index 4e8dfde..180b963 100644
--- a/switch-mail-host
+++ b/switch-mail-host
@@ -10,6 +10,10 @@ Turn off mail receiving on OLD_HOST, run btrbk to move mail to NEW_HOST,
 turn on mail receiving on NEW_HOST.  Assumes we want to move all
 filesystems unless passing -o.
 
+-a         Avoid snapshot /a, /q, and similar. If we haven't
+           made any changes in the last hour, there is no
+           need to snapshot anything but /o, and we will
+           just do that once.
 -i         Disallow incremental backup.
 -o         Only btrbk /o, instead of all filesystems.
 --force    Run even though our local state does not say that MAIL_HOST is
@@ -33,11 +37,11 @@ restore_old_btrbk=false
 err-cleanup() {
   if $restore_new_btrbk; then
     e WARNING: due to failure, btrbk.timer may need manual restoration:
-    e $new_shell systemctl start btrbk.timer
+    e $new_shell systemctl start btrbk.timer btrbk-spread.timer  || (( $? == 5 ))
   fi
   if $restore_old_btrbk; then
     e WARNING: due to failure, btrbk.timer may need manual restoration:
-    e $old_shell systemctl start btrbk.timer
+    e $old_shell systemctl start btrbk.timer btrbk-spread.timer  || (( $? == 5 ))
   fi
 }
 
@@ -57,11 +61,12 @@ fi
 mail_only=false
 host2_only=false
 force=false
-mp_args="-m /o,/q,/a"
-temp=$(getopt -l force,help ioh "$@") || usage 1
+mp_args="-m /o,/a,/ar,/q,/qr"
+temp=$(getopt -l force,help aioh "$@") || usage 1
 eval set -- "$temp"
 while true; do
   case $1 in
+    -a) snapshot_arg=resume ;;
     --force) force=true ;;
     -i) incremental_arg="-i" ;;
     -o)
@@ -141,15 +146,16 @@ elif $host2_only; then
   mp_args="-m /a,/ar,/q,/qr"
 fi
 
-
-if $host2_only; then
-  if [[ $old_hostname != "$HOST2" ]]; then
-    err "\$old_hostname($old_hostname) != \$HOST2($HOST2). Rerun with --force if you really want this."
+if ! $force; then
+  if $host2_only; then
+    if [[ $old_hostname != "$HOST2" ]]; then
+      err "\$old_hostname($old_hostname) != \$HOST2($HOST2). Rerun with --force if you really want this."
+      exit 1
+    fi
+  elif [[ $old_hostname != "$MAIL_HOST" ]]; then
+    err "\$old_hostname($old_hostname) != \$MAIL_HOST($MAIL_HOST). Rerun with --force if you really want this."
     exit 1
   fi
-elif [[ $old_hostname != "$MAIL_HOST" ]] && ! $force; then
-  err "\$old_hostname($old_hostname) != \$MAIL_HOST($MAIL_HOST). Rerun with --force if you really want this."
-  exit 1
 fi
 
 if [[ ! $new_host || ! $old_host ]]; then
@@ -161,11 +167,11 @@ fi
 ########### end initial processing, begin actually modifying things ##########
 
 if $new_shell systemctl is-active btrbk.timer; then
-  m $new_shell systemctl stop btrbk.timer
+  m $new_shell systemctl stop btrbk.timer btrbk-spread.timer || (( $? == 5 ))
   restore_new_btrbk=true
 fi
 if $old_shell systemctl is-active btrbk.timer; then
-  m $old_shell systemctl stop btrbk.timer
+  m $old_shell systemctl stop btrbk.timer btrbk-spread.timer || (( $? == 5 ))
   restore_old_btrbk=true
 fi
 
@@ -204,11 +210,11 @@ if pgrep -G iank -u iank -f 'emacs --daemon' &>/dev/null; then
 fi
 EOF
   if ! $host2_only; then
-    cat <<'EOF'
+    cat <<EOF
 for dir in m o; do
-  if mountpoint -q /$dir; then
-    echo On $new_host: umount /$dir
-    umount /$dir
+  if mountpoint -q /\$dir; then
+    echo On $new_host: umount /\$dir
+    umount /\$dir
   fi
 done
 EOF
@@ -241,8 +247,8 @@ EOF
 
 
 e Running initial btrbk
-if ! m btrbk-run -v $bbk_args $incremental_arg $mp_args; then
-  ret=$?
+m btrbk-run -v $bbk_args $incremental_arg $mp_args $snapshot_arg || ret=$?
+if (( ret )); then
   err "failed initial btrbk"
   exit $ret
 fi
@@ -254,14 +260,15 @@ fi
 
 if $host2_only; then
   if [[ $old_hostname != "$MAIL_HOST" && $old_hostname != kd ]]; then
-    m $old_shell systemctl --now disable btrbk.timer
+    # most systems dont have btrbk-spread, systemctl exits 5 on unknown unit
+    m $old_shell systemctl --now disable btrbk.timer btrbk-spread.timer || (( $? == 5 ))
   fi
-  m $new_shell systemctl --now enable btrbk.timer
+  m $new_shell systemctl --now enable btrbk.timer btrbk-spread.timer  || (( $? == 5 ))
   exit 0
 fi
 
-if ! m $old_shell /a/exe/primary-setup $new_hostname; then
-  ret=$?
+m $old_shell /a/exe/primary-setup $new_hostname || ret=$?
+if (( ret )); then
   err "failed \$old_shell primary-setup \$new_hostname. fix and rerun $script_name"
   exit $ret
 fi
@@ -291,8 +298,8 @@ echo
 #
 # shopt -s nullglob; find . -type f -mtime -2 | while read -r f; do a=( /m/4e/Sent/cur/${f%,*}* ); if (( ${#a[@]} )); then e exists $a; else m cp -a $f /m/4e/Sent/cur; fi; done
 
-if ! m $new_shell /a/exe/primary-setup localhost; then
-  ret=$?
+m $new_shell /a/exe/primary-setup localhost || ret=$?
+if (( ret )); then
   err "failed final primary-setup, just fix and rerun: $new_shell /a/exe/primary-setup localhost"
   exit $ret
 fi