Now we attempt to look for the path of e2fsck before checking if the
path can be found in any of the predefined routes. This fixes e2fsck
not being found on some "special" distros like NixOS.
Related #13754
Previously we'd fail to execute the resize2fs tool which then results
in us recreating the image from scratch:
resizing disk image...
Image resized.
line 132: /usr/sbin/resize2fs: No such file or directory
failed, not using existing image
done
Before, and that was the cause of many confusion in #build-problems
on Discord, the Meta/build-image-*.sh scripts would error out with
the message "this script needs to run as root" while the actual error
was unrelated.
Instead of first doubling the required size for the determined inode
count and then _also_ tripling the sum of that and the determined disk
size, let's be a bit more reasonable and just double the sum of inode
count * size and disk size.
This results in a 1.4GB _disk_image, instead of the 2GB from before
(for < 800MB worth of files).
By providing SERENITY_DISK_SIZE_BYTES as an environment variable, the
calculation of default value considered suitable for the size of files
and number of inodes that will be included can be sidestepped.
According to its manpage genext2fs tries to create the file system with
as few inodes as possible. This causes SerenityOS to fail at boot time
when creating temporary files.
Under Debian `e2fsck` is found in `/sbin/` which does not match the
existing "version" the script currently uses (`/usr/sbin/e2fsck`
versus `/sbin/e2fsck`); therefore I added a simple `if` condition to
remedy the situation by verifying whether the original path exists or
not, so I can use the one Debian expects.
Special thanks goes to Tim Flynn a.k.a. `trflynn89` for his valuable
feedback.
The fuse2fs tool that is part of e2fsprogs-1.46 has a 'fakeroot'
mount option. This allows a non-root users to modify file ownership
and permissions without actually being root. This package is
available in Debian bullseye and buster-backports.
If available, the script assumes the user wants to use it.
Otherwise, it falls back to the usual root requirements.
Now that root is not required, the root check in
build-root-filesystem.sh is not necessary. Since
build-root-filesystem.sh has 'set -e' enabled, removing this check
will not cause a change in functionality.
We want to use use the 'du' option '--apparent-size' which is a
GNU coreutils extension. GNU coreutils is a build dependency so
we know it is available. With this commit we first try to pick up
du as 'gdu', and if that fails, try 'du' instead.
There was previously a case where the build-image-qemu.sh script
decided to mount an existing disk image, but without creating the
memory disk device and recording its /dev file name.
After this commit, We create the memory disk device just before
it is used to mount the disk image.
Having lots of small files in Base/ may require more inodes in the
ext2 filesystem than the format utility sets aside by default. Let's
make a more educated guess since we have a rough idea of how many
inodes we need by counting files and directories.
This adds support for re-using and re-sizing existing disk images.
Disk images are checked with e2fsck prior to re-use and a new disk
image is automatically created when that check fails.
realpath(1) is specific to coreutils and its behavior can be had
with readlink -f
Create the Toolchain Build directory if it doesn't exist before
calling readlink, since realpath(3) on at least OpenBSD will error
on a non-existent path
In the GNU coreutils version of chown, ":" is a valid argument
(the command will result in a no-op), but POSIX chown does not
consider that valid.
If the user who ran build-image-*.sh was root, SUDO_UID and SUDO_GID
would not be set and, if the version of chown installed on the system
did not allow passing just a ":" as argument, the script would fail.
Let's default the value of SUDO_UID and SUDO_GID to 0 just in case.
