Merge pull request #52 from mbiebl/systemctl-edit-default-editor

systemctl: Use /usr/bin/editor if available

man/systemctl.xml

@@ -1733,6 +1733,7 @@ kobject-uevent 1 systemd-udevd-kernel.socket systemd-udevd.service
         <varname>$VISUAL</varname> are present or if it is set to an empty
         string or if their execution failed, systemctl will try to execute well
         known editors in this order:
+        <citerefentry project='die-net'><refentrytitle>editor</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
         <citerefentry project='die-net'><refentrytitle>nano</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
         <citerefentry project='die-net'><refentrytitle>vim</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
         <citerefentry project='die-net'><refentrytitle>vi</refentrytitle><manvolnum>1</manvolnum></citerefentry>.

src/systemctl/systemctl.c

@@ -5879,7 +5879,7 @@ static int run_editor(char **paths) {
                         execvp(editor, (char* const*) args);
                 }
 
-                FOREACH_STRING(p, "nano", "vim", "vi") {
+                FOREACH_STRING(p, "editor", "nano", "vim", "vi") {
                         args[0] = p;
                         execvp(p, (char* const*) args);
                         /* We do not fail if the editor doesn't exist