Re: [Patch v2 2/2] let user specify action after systemd start dracut-emergency

[Harald Hoyer <harald-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>]

On 05/31/2013 09:16 AM, Baoquan wrote:
> On 05/30/2013 06:33 PM, Harald Hoyer wrote:
> 
>> worksforme... with
>> http://git.kernel.org/cgit/boot/dracut/dracut.git/commit/?id=b78e6ac2c328c76057b17059a761ab44707f9aa0
>> and
>> "rd.shell rd.break action_on_fail=continue"
>>
>> dracut-pre-pivot[227]: /lib/dracut-lib.sh@933(_emergency_shell): systemctl start
>> dracut-emergency.service
>> Trying to enqueue job dracut-emergency.service/start/replace
>> Installed new job dracut-emergency.service/start as 39
>> Enqueued job dracut-emergency.service/start as 39
>> Starting of dracut-emergency.service requested but condition failed. Ignoring.
>> Job dracut-emergency.service/start finished, result=done
>>
>> .. no rd.shell on rd.break...
>>
> 
> 
> Hi Harald,
> 
> I tried your method, add
> 
> 
> 1)"rd.break=pre-pivot action_on_fail=continue" to kernel cmdline;
> 
> 2)add "ConditionKernelCommandLine=!action_on_fail=continue" into
> dracut-emergency.service
> 
> it works very well, won't drop into shell. And this works for 1st kernel
> and kdump kernel.
> 
> However, when I tried the mount failed method, it doesn't work.
> 
> 1)"rd.break=pre-pivot action_on_fail=continue" to kernel cmdline;
> 
> 2)add "ConditionKernelCommandLine=!action_on_fail=continue" into
> dracut-emergency.service
> 
> 3)change root to a wrong name in /proc/cmdline to make mount root failed.
> 
> :/# cat /proc/cmdline
> root=/dev/mapper/fedora-root111 action_on_fail=continue .....
> 
> In this way, it always drops into shell.

This is why I said to double check, if you are dropped to
dracut-emergency.service versus emergency.service.