From: Ioanna Alifieraki <ioanna-maria.alifieraki@canonical.com>
Date: Thu, 17 Dec 2020 14:52:07 +0000
Subject: systemctl: do not shutdown immediately on scheduled shutdown

When, for whatever reason, a scheduled shutdown fails to be set, systemd
will proceed with immediate shutdown without allowing the user to react.
This is counterintuitive because when a scheduled shutdown is issued,
it means the user wants to shutdown at a specified time in the future,
not immediately. This patch prevents the immediate shutdown and informs
the user that no action will be taken.

Fixes: #17575
---
 src/systemctl/systemctl-compat-halt.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/systemctl/systemctl-compat-halt.c b/src/systemctl/systemctl-compat-halt.c
index 8a0e4e6..7eeec9a 100644
--- a/src/systemctl/systemctl-compat-halt.c
+++ b/src/systemctl/systemctl-compat-halt.c
@@ -148,9 +148,11 @@ int halt_main(void) {
 
         if (arg_force == 0) {
                 /* always try logind first */
-                if (arg_when > 0)
+                if (arg_when > 0) {
                         r = logind_schedule_shutdown();
-                else {
+                        if (r < 0)
+                                return r;
+                } else {
                         r = logind_check_inhibitors(arg_action);
                         if (r < 0)
                                 return r;