mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 19:52:45 +00:00
e1c982e4db
This removes grub and all the loopback device business from the default build process. Running grub takes about a second, and it turns out it's inconsistently packaged in different distributions, which has led to at least one confusing issue so far (grub-install vs grub2-install). Removing it from the basic path will make it easier for people to try Serenity out. There are now two scripts that can be used to build a disk image: 1. `build-image-grub.sh` - this will build an image suitable for writing to the IDE hard drive of a physical machine, complete with a partition table and bootloader. This can be run in qemu with the `qgrub` target for the `run` script. 2. `build-image-qemu.sh` - this is a simpler script which creates a bare filesystem image rather than a full MBR disk. Both of these call out to `build-root-filesystem.sh` to do most of the work setting up... the root filesystem. For completeness' sake, I've retained the `sync.sh` script as a simple forwarding to `build-image-qemu.sh`. This relies on the functionality from #194 and #195. #195 allows us to use `/dev/hda` as the root device when nothing else is specified, and #194 works around a strange feature of qemu that appends a space to the kernel command line.
87 lines
2.1 KiB
Bash
Executable file
87 lines
2.1 KiB
Bash
Executable file
#!/bin/bash
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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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if [ $(id -u) != 0 ]; then
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die "this script needs to run as root"
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fi
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grub=$(which grub-install 2>/dev/null) || true
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if [[ -z "$grub" ]]; then
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grub=$(which grub2-install 2>/dev/null) || true
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fi
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if [ -z "$grub" ]; then
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echo "can't find a grub-install or grub2-install binary, oh no"
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exit 1
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fi
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echo "using grub-install at ${grub}"
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echo "setting up disk image..."
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dd if=/dev/zero of=_disk_image bs=1M count=${DISK_SIZE:-500} status=none || die "couldn't create disk image"
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chown 1000:1000 _disk_image || die "couldn't adjust permissions on disk image"
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echo "done"
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echo -n "creating loopback device... "
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dev=$(losetup --find --partscan --show _disk_image)
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if [ -z $dev ]; then
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die "couldn't mount loopback device"
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fi
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echo "loopback device is at ${dev}"
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cleanup() {
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if [ -d mnt ]; then
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echo -n "unmounting filesystem... "
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umount mnt || ( sleep 1 && sync && umount mnt )
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rm -rf mnt
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echo "done"
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fi
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if [ -e ${dev} ]; then
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echo -n "cleaning up loopback device... "
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losetup -d ${dev}
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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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echo -n "creating partition table... "
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parted -s ${dev} mklabel msdos mkpart primary ext2 32k 100% -a minimal set 1 boot on || die "couldn't partition disk"
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echo "done"
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echo -n "destroying old filesystem... "
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dd if=/dev/zero of=${dev}p1 bs=1M count=1 status=none || die "couldn't destroy old filesystem"
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echo "done"
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echo -n "creating new filesystem... "
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mke2fs -q -I 128 ${dev}p1 || die "couldn't create filesystem"
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echo "done"
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echo -n "mounting filesystem... "
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mkdir -p mnt
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mount ${dev}p1 mnt/ || die "couldn't mount filesystem"
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echo "done"
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./build-root-filesystem.sh
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echo -n "creating /boot... "
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mkdir -p mnt/boot
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echo "done"
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echo "installing grub using $grub..."
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$grub --boot-directory=mnt/boot --target=i386-pc --modules="ext2 part_msdos" ${dev}
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if [ -d mnt/boot/grub2 ]; then
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cp grub.cfg mnt/boot/grub2/grub.cfg
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else
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cp grub.cfg mnt/boot/grub/grub.cfg
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fi
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echo "done"
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echo -n "installing kernel in /boot... "
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cp kernel mnt/boot
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echo "done"
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