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I think this is more useful (because it's easy to stick the path into an editor command
when one wants to change the options or inspect the files), and more self-explanatory.
Example output:
title: Fedora 30 (Workstation Edition) (4.20.16-200.fc29.x86_64)
id: 08a5690a2eed47cf92ac0a5d2e3cf6b0-4.20.16-200.fc29.x86_64
source: /boot/efi/loader/entries/08a5690a2eed47cf92ac0a5d2e3cf6b0-4.20.16-200.fc29.x86_64.conf
version: 4.20.16-200.fc29.x86_64
...
title: Fedora 30 (Workstation Edition)
id: fedora-30
source: /boot/efi/EFI/Linux/linux-5.0.5-300.fc30.x86_64-08a5690a2eed47cf92ac0a5d2e3cf6b0.efi
linux: EFI/Linux/linux-5.0.5-300.fc30.x86_64-08a5690a2eed47cf92ac0a5d2e3cf6b0.efi
...
title: Reboot Into Firmware Interface
id: auto-reboot-to-firmware-setup
source: /sys/firmware/efi/efivars/LoaderEntries-4a67b082-0a4c-41cf-b6c7-440b29bb8c4f
../src/shared/bootspec.c: In function ‘find_sections’:
../src/shared/bootspec.c:425:23: warning: comparison of integer expressions of different signedness: ‘ssize_t’ {aka ‘int’} and ‘uint32_t’ {aka ‘unsigned int’} [-Wsign-compare]
425 | if (n != size)
| ^~
Coverity was complaining in CID#1399407 that config->entries might be used
while NULL. Let's add an assert to make sure it's not.
Also, let's quit early if we have no entries to loop through. The code was
not incorrect, but it's cleaner to avoid any negative indices.
It seems that my EFI storage is corrupted. The kernel reports the file as present, but returns
an error when reading. Nevertheless, this shouldn't prevent me from reading the entry
list.
Fixes#11909.
Now only two operations are left. Let's just move this into the caller,
since it should make things simpler, clearer and shorter, in particular
as there's only a single user for this.
It's a simple wrapper around boot_entries_load_config(), but determines
the ESP/XBOOTLDR paths automatically at first. Also, it looks for a path
/run/boot-loader-entries/ and loads the entries from there if it
exists. This is supposed to be a hook for other boot loaders to make our
tools aware of their own entries.
Previously, bootctl would show boot loader entries discovered by the
boot loader which couldn't found locally separately in the output.
Let's move this code into bootspec.c, and beef it up a bit. This way we
can use it later on for logind, and correctly show automatically
discovered windows/macos entries too.
find_default_boot_entry() is only used by systemctl.c, and currently
handles one log message in the caller instead of the callee. Let's
simplify that and move it over, too
Let's add a new function that checks whether some directory is the
top-level directory inside an fs, splitting out the code for this from
verify_esp().
While we are at it, let's slightly improve the code, so that we can
correctly work if we have no priviliges but the ESP is mounted
unaccessible: if we can't stat() the path "$ESP/.." then manually remove
the last component of $ESP and check that instead. Which is very similar
in behaviour, and hopefully good enough in the unprivileged case.
udev metadata access works unprivileged, which the blkid stuff doesn't
(as that needs raw device node access). Hence let's use udev if we lack
privs, and raw device access only if root.
This 'root' field contains the root path of the partition we found the
snippet in. The 'kernel', 'initrd', 'efi', … fields are relative to this
path.
This becomes particularly useful later when we add support for loading
snippets from both the ESP and XBOOTLDR, but already simplifies the code
for us a bit in systemctl.
Ideally, coccinelle would strip unnecessary braces too. But I do not see any
option in coccinelle for this, so instead, I edited the patch text using
search&replace to remove the braces. Unfortunately this is not fully automatic,
in particular it didn't deal well with if-else-if-else blocks and ifdefs, so
there is an increased likelikehood be some bugs in such spots.
I also removed part of the patch that coccinelle generated for udev, where we
returns -1 for failure. This should be fixed independently.
let's add an env var for this, as this really shouldn't be a top-level
feature, as it turning off the validity checks certainly isn't
advisable.
Fixes: #4925
boot_loader_read_conf(), boot_entries_find(), boot_entries_load_config()
all log their errors internally, hence no need to log a second or third
time about the same error when they return.
