mirror of
https://github.com/SerenityOS/serenity
synced 2024-09-06 17:06:31 +00:00
6b9913f010
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.
198 lines
6 KiB
Bash
Executable file
198 lines
6 KiB
Bash
Executable file
#!/bin/sh
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# Note: This is done before `set -e` to let `command` fail if needed
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FUSE2FS_PATH=$(command -v fuse2fs)
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if [ -z "$FUSE2FS_PATH" ]; then
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FUSE2FS_PATH=/usr/sbin/fuse2fs
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fi
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set -e
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die() {
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echo "die: $*"
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exit 1
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}
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USE_FUSE2FS=0
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if [ "$(id -u)" != 0 ]; then
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if [ -x "$FUSE2FS_PATH" ] && $FUSE2FS_PATH --help 2>&1 |grep fakeroot > /dev/null; then
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USE_FUSE2FS=1
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else
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sudo -E -- "$0" "$@" || die "this script needs to run as root"
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exit 0
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fi
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else
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: "${SUDO_UID:=0}" "${SUDO_GID:=0}"
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fi
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if [ "$(uname -s)" = "Darwin" ]; then
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export PATH="/usr/local/opt/e2fsprogs/bin:$PATH"
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export PATH="/usr/local/opt/e2fsprogs/sbin:$PATH"
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export PATH="/opt/homebrew/opt/e2fsprogs/bin:$PATH"
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export PATH="/opt/homebrew/opt/e2fsprogs/sbin:$PATH"
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fi
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SCRIPT_DIR="$(dirname "${0}")"
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# Prepend the toolchain qemu directory so we pick up QEMU from there
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PATH="$SCRIPT_DIR/../Toolchain/Local/qemu/bin:$PATH"
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# Also prepend the i686 toolchain directory because that's where most
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# people will have their QEMU binaries if they built them before the
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# directory was changed to Toolchain/Local/qemu.
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PATH="$SCRIPT_DIR/../Toolchain/Local/i686/bin:$PATH"
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# We depend on GNU coreutils du for the --apparent-size extension.
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# GNU coreutils is a build dependency.
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if command -v gdu > /dev/null 2>&1 && gdu --version | grep -q "GNU coreutils"; then
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GNUDU="gdu"
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else
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GNUDU="du"
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fi
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disk_usage() {
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# shellcheck disable=SC2003
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expr "$(${GNUDU} -sk --apparent-size "$1" | cut -f1)"
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}
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inode_usage() {
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find "$1" | wc -l
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}
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INODE_SIZE=128
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INODE_COUNT=$(($(inode_usage "$SERENITY_SOURCE_DIR/Base") + $(inode_usage Root)))
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DISK_SIZE_BYTES=$((($(disk_usage "$SERENITY_SOURCE_DIR/Base") + $(disk_usage Root) + INODE_COUNT) * 1024))
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# Try to use heuristics to guess a good disk size and inode count.
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# The disk must notably fit:
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# * Data blocks (for both files and directories),
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# * Indirect/doubly indirect/triply indirect blocks,
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# * Inodes and block bitmaps for each block group,
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# * Plenty of extra free space and free inodes.
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DISK_SIZE_BYTES=$(((DISK_SIZE_BYTES + (INODE_COUNT * INODE_SIZE * 2)) * 3))
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INODE_COUNT=$((INODE_COUNT * 7))
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E2FSCK="/usr/sbin/e2fsck"
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if [ ! -f "$E2FSCK" ]; then
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E2FSCK=/sbin/e2fsck
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fi
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USE_EXISTING=0
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if [ -f _disk_image ]; then
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USE_EXISTING=1
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echo "checking existing image"
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result=0
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"$E2FSCK" -f -y _disk_image || result=$?
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if [ $result -ge 4 ]; then
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rm -f _disk_image
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USE_EXISTING=0
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echo "failed, not using existing image"
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else
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echo "done"
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fi
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fi
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if [ $USE_EXISTING -eq 1 ]; then
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OLD_DISK_SIZE_BYTES=$(wc -c < _disk_image)
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if [ $DISK_SIZE_BYTES -gt "$OLD_DISK_SIZE_BYTES" ]; then
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echo "resizing disk image..."
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qemu-img resize -f raw _disk_image $DISK_SIZE_BYTES || die "could not resize disk image"
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if ! resize2fs _disk_image; then
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rm -f _disk_image
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USE_EXISTING=0
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echo "failed, not using existing image"
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fi
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echo "done"
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fi
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fi
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if [ $USE_EXISTING -ne 1 ]; then
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printf "setting up disk image... "
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qemu-img create -q -f raw _disk_image $DISK_SIZE_BYTES || die "could not create disk image"
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chown "$SUDO_UID":"$SUDO_GID" _disk_image || die "could not adjust permissions on disk image"
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echo "done"
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printf "creating new filesystem... "
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if [ "$(uname -s)" = "OpenBSD" ]; then
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VND=$(vnconfig _disk_image)
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(echo "e 0"; echo 83; echo n; echo 0; echo "*"; echo "quit") | fdisk -e "$VND"
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newfs_ext2fs -D $INODE_SIZE -n $INODE_COUNT "/dev/r${VND}i" || die "could not create filesystem"
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else
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if [ -x /sbin/mke2fs ]; then
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/sbin/mke2fs -q -I $INODE_SIZE -N $INODE_COUNT _disk_image || die "could not create filesystem"
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else
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mke2fs -q -I $INODE_SIZE -N $INODE_COUNT _disk_image || die "could not create filesystem"
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fi
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fi
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echo "done"
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fi
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printf "mounting filesystem... "
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mkdir -p mnt
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use_genext2fs=0
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if [ $USE_FUSE2FS -eq 1 ]; then
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mount_cmd="$FUSE2FS_PATH _disk_image mnt/ -o fakeroot,rw"
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elif [ "$(uname -s)" = "Darwin" ]; then
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mount_cmd="fuse-ext2 _disk_image mnt -o rw+,allow_other,uid=501,gid=20"
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elif [ "$(uname -s)" = "OpenBSD" ]; then
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VND=$(vnconfig _disk_image)
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mount_cmd="mount -t ext2fs "/dev/${VND}i" mnt/"
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elif [ "$(uname -s)" = "FreeBSD" ]; then
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MD=$(mdconfig _disk_image)
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mount_cmd="fuse-ext2 -o rw+,direct_io "/dev/${MD}" mnt/"
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else
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mount_cmd="mount _disk_image mnt/"
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fi
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if ! eval "$mount_cmd"; then
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if command -v genext2fs 1>/dev/null ; then
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echo "mount failed but genext2fs exists, use it instead"
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use_genext2fs=1
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else
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die "could not mount filesystem and genext2fs is missing"
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fi
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else
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echo "done"
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fi
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cleanup() {
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if [ -d mnt ]; then
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if [ $use_genext2fs = 0 ] ; then
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printf "unmounting filesystem... "
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if [ $USE_FUSE2FS -eq 1 ]; then
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fusermount -u mnt || (sleep 1 && sync && fusermount -u mnt)
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else
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umount mnt || ( sleep 1 && sync && umount mnt )
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fi
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rmdir mnt
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else
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rm -rf mnt
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fi
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if [ "$(uname -s)" = "OpenBSD" ]; then
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vnconfig -u "$VND"
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elif [ "$(uname -s)" = "FreeBSD" ]; then
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mdconfig -d -u "$MD"
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fi
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echo "done"
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fi
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}
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trap cleanup EXIT
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script_path=$(cd -P -- "$(dirname -- "$0")" && pwd -P)
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"$script_path/build-root-filesystem.sh"
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if [ $use_genext2fs = 1 ]; then
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# regenerate new image, since genext2fs is unable to reuse the previously written image.
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# genext2fs is very slow in generating big images, so I use a smaller image here. size can be updated
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# if it's not enough.
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# not using "-I $INODE_SIZE" since it hangs. Serenity handles whatever default this uses instead.
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genext2fs -B 4096 -b $((DISK_SIZE_BYTES / 4096)) -N $INODE_COUNT -d mnt _disk_image || die "try increasing image size (genext2fs -b)"
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# if using docker with shared mount, file is created as root, so make it writable for users
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chmod 0666 _disk_image
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fi
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