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|
#!/bin/sh
set -e
die() {
echo "die: $*"
exit 1
}
if [ "$(id -u)" != 0 ]; then
exec sudo -E -- "$0" "$@" || die "this script needs to run as root"
else
: "${SUDO_UID:=0}" "${SUDO_GID:=0}"
fi
if [ "$(uname -s)" = "Darwin" ]; then
export PATH="/usr/local/opt/e2fsprogs/bin:$PATH"
export PATH="/usr/local/opt/e2fsprogs/sbin:$PATH"
export PATH="/opt/homebrew/opt/e2fsprogs/bin:$PATH"
export PATH="/opt/homebrew/opt/e2fsprogs/sbin:$PATH"
fi
SCRIPT_DIR="$(dirname "${0}")"
# Prepend the toolchain qemu directory so we pick up QEMU from there
PATH="$SCRIPT_DIR/../Toolchain/Local/qemu/bin:$PATH"
# Also prepend the i686 toolchain directory because that's where most
# people will have their QEMU binaries if they built them before the
# directory was changed to Toolchain/Local/qemu.
PATH="$SCRIPT_DIR/../Toolchain/Local/i686/bin:$PATH"
disk_usage() {
# shellcheck disable=SC2003
if [ "$(uname -s)" = "Darwin" ]; then
expr "$(du -sk "$1" | cut -f1)"
else
expr "$(du -sk --apparent-size "$1" | cut -f1)"
fi
}
inode_usage() {
find "$1" | wc -l
}
INODE_SIZE=128
INODE_COUNT=$(($(inode_usage "$SERENITY_SOURCE_DIR/Base") + $(inode_usage Root)))
DISK_SIZE_BYTES=$((($(disk_usage "$SERENITY_SOURCE_DIR/Base") + $(disk_usage Root) + INODE_COUNT) * 1024))
# Try to use heuristics to guess a good disk size and inode count.
# The disk must notably fit:
# * Data blocks (for both files and directories),
# * Indirect/doubly indirect/triply indirect blocks,
# * Inodes and block bitmaps for each block group,
# * Plenty of extra free space and free inodes.
DISK_SIZE_BYTES=$(((DISK_SIZE_BYTES + (INODE_COUNT * INODE_SIZE * 2)) * 3))
INODE_COUNT=$((INODE_COUNT * 7))
USE_EXISTING=0
if [ -f _disk_image ]; then
USE_EXISTING=1
echo "checking existing image"
result=0
e2fsck -f -y _disk_image || result=$?
if [ $result -ge 4 ]; then
rm -f _disk_image
USE_EXISTING=0
echo "failed, not using existing image"
else
echo "done"
fi
fi
if [ $USE_EXISTING -eq 1 ]; then
OLD_DISK_SIZE_BYTES=$(wc -c < _disk_image)
if [ $DISK_SIZE_BYTES -gt "$OLD_DISK_SIZE_BYTES" ]; then
echo "resizing disk image..."
qemu-img resize -f raw _disk_image $DISK_SIZE_BYTES || die "could not resize disk image"
if ! resize2fs _disk_image; then
rm -f _disk_image
USE_EXISTING=0
echo "failed, not using existing image"
fi
echo "done"
fi
fi
if [ $USE_EXISTING -ne 1 ]; then
printf "setting up disk image... "
qemu-img create -q -f raw _disk_image $DISK_SIZE_BYTES || die "could not create disk image"
chown "$SUDO_UID":"$SUDO_GID" _disk_image || die "could not adjust permissions on disk image"
echo "done"
printf "creating new filesystem... "
if [ "$(uname -s)" = "OpenBSD" ]; then
VND=$(vnconfig _disk_image)
(echo "e 0"; echo 83; echo n; echo 0; echo "*"; echo "quit") | fdisk -e "$VND"
newfs_ext2fs -D $INODE_SIZE -n $INODE_COUNT "/dev/r${VND}i" || die "could not create filesystem"
elif [ "$(uname -s)" = "FreeBSD" ]; then
MD=$(mdconfig _disk_image)
mke2fs -q -I $INODE_SIZE -N $INODE_COUNT _disk_image || die "could not create filesystem"
else
if [ -x /sbin/mke2fs ]; then
/sbin/mke2fs -q -I $INODE_SIZE -N $INODE_COUNT _disk_image || die "could not create filesystem"
else
mke2fs -q -I $INODE_SIZE -N $INODE_COUNT _disk_image || die "could not create filesystem"
fi
fi
echo "done"
fi
printf "mounting filesystem... "
mkdir -p mnt
use_genext2fs=0
if [ "$(uname -s)" = "Darwin" ]; then
mount_cmd="fuse-ext2 _disk_image mnt -o rw+,allow_other,uid=501,gid=20"
elif [ "$(uname -s)" = "OpenBSD" ]; then
mount_cmd="mount -t ext2fs "/dev/${VND}i" mnt/"
elif [ "$(uname -s)" = "FreeBSD" ]; then
mount_cmd="fuse-ext2 -o rw+,direct_io "/dev/${MD}" mnt/"
else
mount_cmd="mount _disk_image mnt/"
fi
if ! eval "$mount_cmd"; then
if command -v genext2fs 1>/dev/null ; then
echo "mount failed but genext2fs exists, use it instead"
use_genext2fs=1
else
die "could not mount filesystem and genext2fs is missing"
fi
else
echo "done"
fi
cleanup() {
if [ -d mnt ]; then
if [ $use_genext2fs = 0 ] ; then
printf "unmounting filesystem... "
umount mnt || ( sleep 1 && sync && umount mnt )
rmdir mnt
else
rm -rf mnt
fi
if [ "$(uname -s)" = "OpenBSD" ]; then
vnconfig -u "$VND"
elif [ "$(uname -s)" = "FreeBSD" ]; then
mdconfig -d -u "$MD"
fi
echo "done"
fi
}
trap cleanup EXIT
script_path=$(cd -P -- "$(dirname -- "$0")" && pwd -P)
"$script_path/build-root-filesystem.sh"
if [ $use_genext2fs = 1 ]; then
# regenerate new image, since genext2fs is unable to reuse the previously written image.
# genext2fs is very slow in generating big images, so I use a smaller image here. size can be updated
# if it's not enough.
# not using "-I $INODE_SIZE" since it hangs. Serenity handles whatever default this uses instead.
genext2fs -B 4096 -b $((DISK_SIZE_BYTES / 4096)) -d mnt _disk_image || die "try increasing image size (genext2fs -b)"
# if using docker with shared mount, file is created as root, so make it writable for users
chmod 0666 _disk_image
fi
|
