On Tue, Jun 11, 2013 at 11:14 PM, Colin Walters <walt...@verbum.org> wrote: > On Tue, 2013-06-04 at 15:30 +0200, Lennart Poettering wrote: >> On Mon, 03.06.13 19:10, Colin Walters (walt...@verbum.org) wrote: >> >> > What's the implementation status of >> > http://www.freedesktop.org/wiki/Specifications/BootLoaderSpec/ ? >> > >> > For example, do any patches exist for grub or syslinux to read >> > from /boot/loader (either at runtime or to generate a bootloader-native >> > config file statically?) >> > >> > I'm aware gummiboot does (and its wiki page should probably crosslink >> > with the above). But any others? >> >> The Grub patch I did (that Kay linked exists), but this isn't polished >> and fully integrated into Fedora yet. > > The question I had looking at this is: what determines the ordering? I > guess it's intended to be the version field, but what if I have both > Debian and Fedora installed, the default comes down to whichever has a > newer kernel?
Gummiboot does have a config file which contains a pattern match, which carries the machine-id, it will always pick the latest kernel for that given machine: $ sudo cat /boot/loader/loader.conf #timeout 3 default 6a9857a393724b7a981ebb5b8495b9ea-* > Or should bootloaders only use the version field to sort within say a > given machine-id, and retain their own custom config files for global > ordering? That'd make the most sense to me. Right, that part is not specified in the spec. > BTW, there is quite a lot of semantics that comes with the phrase > "Debian-style version sorts". gummiboot appears to use "strverscmp" > from glibc, but that doesn't do the "~" character for example. I think glibc's version is more complex, isn't it? I don't know exactly where gummiboot's version is coming from, might be just the simplest working version: http://cgit.freedesktop.org/gummiboot/tree/src/efi/gummiboot.c#n984 Kay _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
