Current code works only if package matches binary name transformation rules.
It's often true but is not guaranteed.
Fixes: https://savannah.gnu.org/bugs/?64410
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Per systemctl(1), it "is asynchronous; it will return after the reboot
operation is enqueued, without waiting for it to complete". This differs
from kexec(8), which calls reboot(2) and therefore does not return.
When not using fallback, this confusingly results in:
error trying to perform 'systemctl kexec': 0
Aborted. Press any key to exit.
on screen for a bit, followed by successful kexec.
To reduce the likelihood of hitting this case, add a delay on successful
return. Ultimately, the systemd interface is racy: we can't avoid it
entirely unless we never fallback on success.
Signed-off-by: Robbie Harwood <rharwood@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
The GRUB emulator is used as a debugging utility but it could also be
used as a user-space bootloader if there is support to boot an operating
system.
The Linux kernel is already able to (re)boot another kernel via the
kexec boot mechanism. So the grub-emu tool could rely on this feature
and have linux and initrd commands that are used to pass a kernel,
initramfs image and command line parameters to kexec for booting
a selected menu entry.
By default the systemctl kexec option is used so systemd can shutdown
all of the running services before doing a reboot using kexec. But if
this is not present, it can fall back to executing the kexec user-space
tool directly. The ability to force a kexec-reboot when systemctl kexec
fails must only be used in controlled environments to avoid possible
filesystem corruption and data loss.
Signed-off-by: Raymund Will <rw@suse.com>
Signed-off-by: John Jolly <jjolly@suse.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Signed-off-by: Robbie Harwood <rharwood@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
