[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Avoiding best-effort
From: |
Vladimir 'φ-coder/phcoder' Serbinenko |
Subject: |
Re: Avoiding best-effort |
Date: |
Tue, 20 Jul 2010 15:50:08 +0200 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.10) Gecko/20100620 Icedove/3.0.5 |
On 07/10/2010 09:11 AM, Samuel Thibault wrote:
> Hello,
>
> There's a concern with the way grub menu entries work: even if a command
> fails, grub continues with others, like bash's "best-effort" way. This
> leads to difficult-to-diagnose results: say for instance
>
> multiboot /boot/mykernel
> module /boot/initrd
> module /boot/inittask
>
> and initrd is too big for the memory for instance. The actual error
> message that the user will be able to read is "rd0: no such device",
> because grub will silently ignore the initrd load failure.
>
> It'd be better to at least have a way to show the actual error. I've
> talked a bit with phcoder, the kind of solutions we've come with are
>
> - "set -e" command, to disable best-effort
>
I think this is a possibility. set -e must be limited to current
menuentry. Also it's out of the question to touch internal "set" for
this. You need either a separate command (shopt ?) or use priorities.
But set -e must not be imposed on user by default because target machine
may be a server and a small error shouldn't interrupt server booting.
> - shell-like "&&" to chain commands only if they succeed
> - introduce a small delay when printing error messages, to keep best
> effort while still showing the actual grub error.
>
This would be good independently of interrupting execution. Wait must be
right before executing implied "boot" command. It should also not take
into account the progress echos.
> Thoughts?
>
> Samuel
>
> _______________________________________________
> Grub-devel mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/grub-devel
>
>
--
Regards
Vladimir 'φ-coder/phcoder' Serbinenko
signature.asc
Description: OpenPGP digital signature
- Avoiding best-effort, Samuel Thibault, 2010/07/10
- Re: Avoiding best-effort,
Vladimir 'φ-coder/phcoder' Serbinenko <=