Implement showing Message of the Day always by creating a file called…

… `.motd_show_always` at HOME. WhitewaterFoundry/Pengwin#766

profile.d/update-motd.sh

@@ -1,17 +1,35 @@
 #!/bin/sh
+# bashsupport disable=BP5007
 
-# runs the scripts on /etc/update-motd.d
+hushlogin_not_enabled() {
+  [ ! -e "${hushlogin_file}" ]
+}
 
-motd_shown_file="$HOME/.motd_shown"
-hushlogin_file="$HOME/.hushlogin"
+motd_shown_today() {
+  find "${motd_shown_file}" -newermt 'today  0:00' 2>/dev/null | grep -q -m 1 ''
+}
 
-if [ ! -e "${hushlogin_file}" ] && ! find "${motd_shown_file}" -newermt 'today  0:00' 2>/dev/null | grep -q -m 1 ''; then
-  run-parts --lsbsysinit /etc/update-motd.d
-  touch "${motd_shown_file}"
-  printf "\n"
-  printf "This message is shown once a day. To disable it you can create the %s file" "${hushlogin_file}"
-  printf "\n\n"
-fi
+motd_show_always() {
+  [ -e "${motd_show_always_file}" ]
+}
 
-unset motd_shown_file
-unset hushlogin_file
+main() {
+  # runs the scripts on /etc/update-motd.d
+  motd_shown_file="$HOME/.motd_shown"
+  hushlogin_file="$HOME/.hushlogin"
+  motd_show_always_file="$HOME/.motd_show_always"
+
+  if motd_show_always || (hushlogin_not_enabled && ! motd_shown_today); then
+    run-parts --lsbsysinit /etc/update-motd.d
+    touch "${motd_shown_file}"
+    printf "\n"
+    printf "This message is shown once a day. To disable it you can create the %s file" "${hushlogin_file}"
+    printf "\n\n"
+  fi
+
+  unset motd_shown_file
+  unset hushlogin_file
+  unset motd_show_always_file
+}
+
+main "$@"