On Thu, Mar 19, 2020 at 5:19 PM PGNet Dev <pgnet....@gmail.com> wrote: > > a recent grub package update, in ubuntu 18LTS, is breaking /etc/default/grub > by mangling/overwriting users' entries, in the specific case of using > continuation lines in the file/config. and, subsequently, the upgrade process > on these servers.
This sounds like an issue you should hash out with your distro maintainer. How Ubuntu manages package upgrades is not within the scope of this mailing list. > it'd be useful/helpful to get clear on what the 'official' grub project > support for use of posix-shell-compliant continuation lines is ... > are they 'supported' as valid use in /etc/default/grub, or not? The manual section you quoted seems pretty clear to me: it must be valid POSIX shell input. Backslash-escaped newlines are valid POSIX shell input. Technically speaking, /etc/default/grub is sourced by grub-mkconfig, which is executed by /bin/sh. So long as /bin/sh is able to correctly process both grub-mkconfig and /etc/default/grub, you probably wont have a problem. If /bin/sh happens to be bash, you could probably get away with putting bash-specific code in /etc/default/grub if you really wanted to. What your distro chooses to support is really up to them, however. > also useful to know/understand whether any grub update can/should mangle a > user's /etc/default/grub. allowed? expected? I think this is not something the grub developers care about; work it out with your distro maintainer. _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
