mirror of
https://github.com/AuxXxilium/redpill-lkm5.git
synced 2024-12-03 21:25:44 +07:00
74 lines
2.1 KiB
Bash
74 lines
2.1 KiB
Bash
#!/usr/bin/env bash
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# Injects RedPill LKM file into a ramdisk inside of an existing image (so you can test new LKM without constant full image
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# rebuild & transfer)
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#
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# Internally we use it something like this with Proxmox pointing to /dev/loop0 as the USB source:
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# rm redpill.ko ; wget https://buildsrv/redpill.ko ; \
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# IRP_LEAVE_ATTACHED=1 ./inject_rp_ko.sh rp-3615-v6.img redpill.ko ; losetup ; \
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# qm stop 101 ; sleep 1 ; qm start 101 ; qm terminal 101 -iface serial1
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self=${0##*/}
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img="$(realpath $1 2> /dev/null)"
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lkm="$(realpath $2 2> /dev/null)"
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if [ $# -ne 2 -o ! -f "$img" -o ! -f "$lkm" ]
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then
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echo "Usage: $self <rp-load-img> <redpill.ko>"
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exit 2
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fi
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echo "Detaching $img from all loopdevs"
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losetup -j "$img" | grep -E -o '^/dev/loop[0-9]+' | \
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while read -r loopdev; do
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umount "${loopdev}p"? 2>/dev/null
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losetup -d "$loopdev"
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echo "Detached $loopdev"
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done
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losetup -j "$img" | grep -E -q '^/dev/loop[0-9]+'
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if [ $? -eq 0 ]; then
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echo "$img is still attached to some loop devs!"
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exit 1
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fi
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set -euo pipefail
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LODEV="$(losetup --show -f -P "$img")"
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UNIQ_BASE="$PWD/__inject_rp_$(date '+%s')"
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echo "Making directories in $UNIQ_BASE"
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TMP_MNT_DIR="$UNIQ_BASE/img-mnt"
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TMP_RDU_DIR="$UNIQ_BASE/rd-unpacked"
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mkdir -p "$TMP_MNT_DIR"
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mkdir -p "$TMP_RDU_DIR"
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echo "Mounting in $TMP_MNT_DIR"
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mount "${LODEV}p1" "$TMP_MNT_DIR"
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echo "Unpacking $TMP_MNT_DIR/rd.gz"
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cd "$TMP_RDU_DIR"
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if file "$TMP_MNT_DIR/rd.gz" | grep -q 'cpio archive'; then # special case: uncompressed rd
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IRP_FLAT_RD=1
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cat "$TMP_MNT_DIR/rd.gz" | cpio -idmv
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else
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IRP_FLAT_RD=0
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xz -dc < "$TMP_MNT_DIR/rd.gz" | cpio -idmv
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fi
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echo "Copying $lkm"
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cp "$lkm" "$TMP_RDU_DIR/usr/lib/modules/rp.ko"
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echo "Repacking $TMP_MNT_DIR/rd.gz"
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if [[ IRP_FLAT_RD -eq 1 ]]; then # special case: uncompressed rd
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find . 2>/dev/null | cpio -o -H newc -R root:root > "$TMP_MNT_DIR/rd.gz"
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else
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find . 2>/dev/null | cpio -o -H newc -R root:root | xz -9 --format=lzma > "$TMP_MNT_DIR/rd.gz"
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fi
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echo "Unmounting & detaching (if requested)"
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sync
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umount "$TMP_MNT_DIR"
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if [[ -z "${IRP_LEAVE_ATTACHED}" ]]; then
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losetup -d "$LODEV"
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fi
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echo "Cleaning up $UNIQ_BASE"
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rm -rf "$UNIQ_BASE" |