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From 797b00e6a6f33d2b74beba02f678bf4d12e2146b Mon Sep 17 00:00:00 2001
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From: Ludwig Nussel <ludwig.nussel@suse.de>
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Date: Tue, 14 Dec 2021 17:27:05 +0100
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Subject: [PATCH] systemctl: simplify halt_main()
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The code at this point is not able to tell whether it was called as
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halt/poweroff/reboot or shutdown with time "now".
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The code also takes a shortcut to skip logind if called as root.
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That however means asking shutdown for immediate action won't trigger a
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wall message.
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As per https://github.com/systemd/systemd/issues/8424#issuecomment-374677315
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all commands should trigger a wall message.
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That simplifies the code as we can try logind first always.
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(cherry picked from commit adefc8789b63225662e50ceaa282f9553b5c64eb)
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Resolves: #2053273
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---
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src/systemctl/systemctl.c | 44 ++++++++++++++++-----------------------
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1 file changed, 18 insertions(+), 26 deletions(-)
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diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
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index b967550b97..4bedb52f2a 100644
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--- a/src/systemctl/systemctl.c
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+++ b/src/systemctl/systemctl.c
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@@ -8658,34 +8658,23 @@ static int logind_schedule_shutdown(void) {
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static int halt_main(void) {
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int r;
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- r = logind_check_inhibitors(arg_action);
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- if (r < 0)
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- return r;
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-
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+ /* always try logind first */
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if (arg_when > 0)
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- return logind_schedule_shutdown();
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-
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- if (geteuid() != 0) {
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- if (arg_dry_run || arg_force > 0) {
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- (void) must_be_root();
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- return -EPERM;
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- }
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+ r = logind_schedule_shutdown();
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+ else {
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+ r = logind_check_inhibitors(arg_action);
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+ if (r < 0)
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+ return r;
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- /* Try logind if we are a normal user and no special
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- * mode applies. Maybe PolicyKit allows us to shutdown
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- * the machine. */
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- if (IN_SET(arg_action, ACTION_POWEROFF, ACTION_REBOOT, ACTION_HALT)) {
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- r = logind_reboot(arg_action);
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- if (r >= 0)
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- return r;
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- if (IN_SET(r, -EOPNOTSUPP, -EINPROGRESS))
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- /* requested operation is not
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- * supported on the local system or
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- * already in progress */
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- return r;
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- /* on all other errors, try low-level operation */
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- }
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+ r = logind_reboot(arg_action);
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}
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+ if (r >= 0)
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+ return r;
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+ if (IN_SET(r, -EOPNOTSUPP, -EINPROGRESS))
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+ /* Requested operation is not supported on the local system or already in
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+ * progress */
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+ return r;
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+ /* on all other errors, try low-level operation */
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/* In order to minimize the difference between operation with and
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* without logind, we explicitly enable non-blocking mode for this,
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@@ -8695,7 +8684,10 @@ static int halt_main(void) {
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if (!arg_dry_run && !arg_force)
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return start_with_fallback();
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- assert(geteuid() == 0);
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+ if (geteuid() != 0) {
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+ (void) must_be_root();
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+ return -EPERM;
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+ }
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if (!arg_no_wtmp) {
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if (sd_booted() > 0)
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