a4f5ed5a7c
dracut is not really ready to be installed with a non-/ prefix, and it
has a lot of hard-coded assumptions that it is going to run on the host
for which it is goign to generate an initramfs; for example, it
hard-codes calls to /lib/dracut/some-file in some of its modules. It
also uses the host system layout to decide whether it needs a
merged-usr or not.
Furthermore, dracut populates the temporary directory which content will
be used to generate the cpio, with a bunch of files, even before calling
any of the dracut modules.
The name for that temporary directory is not predictable (looks like the
output of 'mktemp -d dracut.XXXXXX', with names like dracut.1Vfn9F seen
while debugging).
As a consequence, we can't prepare the temporary directory with the
proper symlinks beforehand.
So, we provide a very-early module of our own, that will (hopefully) run
before any other module, to fixup the messed-up layout prepared by
dracut. This module moves the content of /lib, /bin, and /sbin, out and
into their counterparts in /usr, and creates the usual symlinks.
When we do not require a merged-usr, then we have nothing to do, so the
module checks for /lib being a symlink, as the hint that we want a
merged-usr or not.
Note: currently, we've seen nothing that dracut installed in /bin or
/sbin, but for trying to be future-proof, we also handle them; this
causes a spurious warning:
mv: cannot stat '..../build/buildroot-fs/cpio/tmp/dracut.YQnzNP/initramfs/bin/*': No such file or directory
Since there are already quite a bunch of similar failures in the
official modules bundled in dracut, an extra such issue or two should
not be too scary...
Fixes:
https://gitlab.com/buildroot.org/buildroot/-/jobs/3282261241
https://gitlab.com/buildroot.org/buildroot/-/jobs/3282261239
https://gitlab.com/buildroot.org/buildroot/-/jobs/3282261236
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Thierry Bultel <thierry.bultel@linatsea.fr>
Cc: Adam Duskett <aduskett@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
27 lines
709 B
Bash
27 lines
709 B
Bash
#!/bin/bash
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check() {
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[ -L "${dracutsysrootdir?}/lib" ]
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}
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depends() {
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return 0
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}
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install() {
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# dracut pre-installs a set of files before calling any of
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# the modules, and dracut also messes up host vs. target
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# system, so on a non-merged-usr host, it will prepare a
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# non-merged-usr initramfs, even though the current config
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# is for a merged-usr system.
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# So undo its borkage.
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for dir in lib bin sbin; do
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mkdir -p "${initdir?}/usr/${dir}"
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if [ -d "${initdir?}/${dir}" ]; then
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mv "${initdir?}/${dir}/"* "${initdir?}/usr/${dir}"
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rm -rf "${initdir?}/${dir}"
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ln -s "usr/${dir}" "${initdir?}/${dir}"
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fi
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done
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}
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