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Let's not refuse low or high disk sizes unnecessarily early. They disk
sizes are subject fs limits anyway, hence there's no point in adding
another limit.
Relaxing thhe rules here as the advantage that we can later allow
"homectl resize lennart 0" as a generic way to minimize disk space.
Previously the mkdir_label() family of calls was implemented in
src/shared/mkdir-label.c but its functions partly declared ins
src/shared/label.h and partly in src/basic/mkdir.h (!!). That's weird
(and wrong).
Let's clean this up, and add a proper mkdir-label.h matching the .c
file.
Let's reduce our code duplication, and let's focus on using xyzat()
style APIs more, hence drop mkdir_errno_wrapper() and stick to
mkdirar_errno_wrapper() wherever we can, it's a true superset of
functionality after all.
It's "sysext", not "sysexit".
The string passed here is pure decoration, and noone will see it, since
it's only in our private mount namespace. But still, it's a typo, let's
fix it
Let's make sure mac_selinux_create_file_prepare_at() works fine with
AT_FDCWD, and then make mac_selinux_create_file_prepare() just a inline
wrapper around it.
Forcing a specific fs for the image is usually a bad idea because the initrd
(borrowed from the host) is likely to include only support for the filesystem
used by the host's rootfs.
Since the point of this test is to check aliases on mount units, there's no
specific need for ext4, hence drop any parts that request or rely on ext4.
When working on systemd, it's often useful to be able to comment out
a function to see how a build behaves without it. Currently, when doing
this with a static function that's only used once, the build fails because
the function then becomes unused. As such, Let's downgrade the unused
function error to a warning in local builds.
This mirrors what was done in 564761fcae
for sysusers.d. If we allow separating resolved sysusers config
in a subpackage, we should do the same for the symlink that is
only useful when resolved is installed.
Related to #21317.
The sentence wasn't correct English language, let's fix that. More
importantly: if the mount options are empty we'd display "(null)" here.
Fix that. (And they can be empty IRL, see CI results)
The man page doesn't quite match what --help says, and I needed to use "-f" to
write a wiped partition. This all feels a bit experimental, but the fs has some
adherents, and we should make it easy to use.
(Also, an empty 256MB device formatted and mounted shows up as
Filesystem Size Used Avail Use% Mounted on
/dev/loop0 254M 85M 170M 34% /var/tmp/mount
which also seems a bit over the top…)
Requested in https://github.com/systemd/systemd/pull/21275#issuecomment-967928690.
Apparently mkswap has it's own limit, and it seems to be one lower than the one
for ext2/3/4.
$ for i in ext2 ext3 ext4 btrfs xfs vfat swap minix; do
echo $i && wipefs -q -a '/var/tmp/głąbźśńćąśððð.img'
build/systemd-makefs $i '/var/tmp/głąbźśńćąśððð.img'
done
ext2
/var/tmp/głąbźśńćąśððð.img successfully formatted as ext2 (label "głąbźśńćą", uuid 7626bc5c-8ac4-43cf-87b7-1b2761272dd3)
ext3
/var/tmp/głąbźśńćąśððð.img successfully formatted as ext3 (label "głąbźśńćą", uuid 0da22cad-0dbf-4a7a-962d-12cd39d006b5)
ext4
/var/tmp/głąbźśńćąśððð.img successfully formatted as ext4 (label "głąbźśńćą", uuid dded267b-8955-4d19-82a5-1f231d446059)
btrfs
/var/tmp/głąbźśńćąśððð.img successfully formatted as btrfs (label "głąbźśńćąśððð.img", uuid 9e2e89f1-010d-4ab6-80f3-f9e215dbc225)
xfs
/var/tmp/głąbźśńćąśððð.img successfully formatted as xfs (label "głąbźśń", uuid 2cc937af-4c41-465c-8f52-aab2304bd860)
vfat
mkfs.fat 4.2 (2021-01-31)
/var/tmp/głąbźśńćąśððð.img successfully formatted as vfat (label "G__B_______", uuid a3a9e028)
swap
...
LABEL=głąbźśńć, UUID=0ab787aa-37a6-4b32-978b-d71efc6e6098
/var/tmp/głąbźśńćąśððð.img successfully formatted as swap (label "głąbźśńć", uuid 0ab787aa-37a6-4b32-978b-d71efc6e6098)
minix
...
/var/tmp/głąbźśńćąśððð.img successfully formatted as minix (no label or uuid specified)
I was testing with a "test1.img" and mkfs.vfat rejects "TEST1.IMG" with the
error "Labels with characters *?.,;:/\|+=<>[]" are not allowed". So let's
replace those characters with "_".
Let's keep the comments together with the lines they describe, this is easier
to read and probably more maintainable in the long run.
Also, () → {} for idiomaticity.
