kxtzownsu
e8b6a73f87
(THIS COMMIT WILL NOT BUILD) changelog: - builder will now apply rootfs to image - builder has basic functions to shrink image
70 lines
1.4 KiB
Bash
70 lines
1.4 KiB
Bash
#!/bin/bash
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# PicoShim Builder
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# 2024
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if [ $EUID -ne 0 ]; then
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echo "You MUST run this program with sudo or as root."
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exit 1
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fi
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if [ "$1" == "" ]; then
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echo "No shim passed, please pass a shim to the args."
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echo "$@"
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exit 1
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fi
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SCRIPT_DIR=$(dirname "$0")
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VERSION=1
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HOST_ARCH=$(lscpu | grep Architecture | awk '{print $2}')
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if [ $HOST_ARCH == "x86_64" ]; then
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CGPT="$SCRIPT_DIR/bins/cgpt.x86-64"
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SFDISK="$SCRIPT_DIR/bins/sfdisk.x86-64"
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else
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CGPT="$SCRIPT_DIR/bins/cgpt.aarch64"
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SFDISK="$SCRIPT_DIR/bins/sfdisk.aarch64"
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fi
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source lib/extract_initramfs.sh
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source lib/detect_arch.sh
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echo "PicoShim builder"
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echo "requires: binwalk, fdisk"
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SHIM="$1"
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initramfs="/tmp/initramfs_path"
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ROOTFS_MNT="/tmp/picoshim_rootmnt"
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loopdev=$(losetup -f)
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STATE_SIZE=$((1 * 1024 * 1024))
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rm -rf $initramfs # cleanup previous instances of picoshim, if they existed.
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mkdir -p $initramfs
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rm -rf $ROOTFS_MNT # cleanup previous instances of picoshim, if they existed.
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mkdir -p $ROOTFS_MNT
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if [ -f "$SHIM" ]; then
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losetup -P "$loopdev" "$SHIM"
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else
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exit 1
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fi
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arch=$(detect_arch $loopdev)
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extract_initramfs_full "$SHIM" "$initramfs" ""$loopdev"p2" "$arch"
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echo "creating new filesystem on rootfs"
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echo "y" | mkfs.ext4 "$loopdev"p3 -L ROOT-A
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echo "mounting & moving files from initramfs to rootfs"
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mount "$loopdev"p3 "$ROOTFS_MNT"
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mv "$initramfs"/* "$ROOTFS_MNT"/
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umount "$loopdev"p3
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shrink_root
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echo "cleaning up"
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losetup -D
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rm -rf $initramfs
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rm -rf $ROOTFS_MNT
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