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pkg/driver/flatcar: Update the script #425

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Feb 7, 2024
Merged

pkg/driver/flatcar: Update the script #425

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70 changes: 49 additions & 21 deletions pkg/driver/distro/flatcar.go
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Original file line number Diff line number Diff line change
Expand Up @@ -28,29 +28,57 @@ import (
)

const flatcarRelocateScript = `
local -a tools=(
scripts/basic/fixdep
scripts/mod/modpost
tools/objtool/objtool
)
local -r hostld=$(ls /host/usr/lib64/ld-linux-*.so.*)
local -r kdir=/lib/modules/$(ls /lib/modules/)/build
echo "** Found host dl interpreter: ${hostld}"
for host_tool in ${tools[@]}; do
t=${host_tool}
tool=$(basename $t)
tool_dir=$(dirname $t)
host_tool=${kdir}/${host_tool}
if [ ! -f ${host_tool} ]; then
set -euo pipefail

shopt -s nullglob

hostlds=( /host/usr/lib64/ld-linux-*.so.* )
if [[ ${#hostlds[@]} -eq 0 ]]; then
echo "** no dynamic loaders found"
exit 1
fi
if [[ ${#hostlds[@]} -gt 1 ]]; then
echo "** more than one fitting dynamic loader found, picking first"
fi
hostld=${hostlds[0]}
echo "** Found host dynamic loader: ${hostld}"

kdirs=( /host/lib/modules/*/build )
if [[ ${#kdirs[@]} -eq 0 ]]; then
echo "** no kernel module tools directories found"
exit 1
fi
if [[ ${#kdirs[@]} -gt 1 ]]; then
echo "** more than one fitting kernel module tools directory found, picking first"
fi
kdir=${kdirs[0]}
echo "** Found kernel tools directory: ${kdir}"

tools=(
scripts/basic/fixdep
scripts/mod/modpost
tools/objtool/objtool
)

tmp_dir=$(mktemp -d)
for tool in "${tools[@]}"; do
host_tool=${kdir}/${tool}
if [[ ! -f ${host_tool} ]]; then
echo "${tool@Q} not found in ${kdir@Q}, not patching"
continue
fi
umount ${host_tool} 2>/dev/null || true
mkdir -p /tmp/${tool_dir}/
cp -a ${host_tool} /tmp/${tool_dir}/
echo "** Setting host dl interpreter for $host_tool"
patchelf --set-interpreter ${hostld} --set-rpath /host/usr/lib64 /tmp/${tool_dir}/${tool}
mount -o bind /tmp/${tool_dir}/${tool} ${host_tool}
umount "${host_tool}" 2>/dev/null || true
tmp_tool=${tmp_dir}/${tool}
mkdir -p "$(dirname "${tmp_tool}")"
cp -a "${host_tool}" "${tmp_tool}"
echo "** Setting host dynamic loader for ${tool@Q}"
patchelf \
--set-interpreter "${hostld}" \
--set-rpath /host/usr/lib64 \
"${tmp_tool}"
mount -o bind "${tmp_tool}" "${host_tool}"
done
rm -rf "${tmp_dir}"
`

func init() {
Expand Down Expand Up @@ -94,7 +122,7 @@ func (f *flatcar) customizeBuild(ctx context.Context,
return nil, nil
}
printer.Logger.Info("Flatcar detected; relocating kernel tools.", printer.Logger.Args("version", f.versionID))
out, err := exec.CommandContext(ctx, "/bin/bash", "-c", flatcarRelocateScript).Output()
out, err := exec.CommandContext(ctx, "/bin/bash", "-c", flatcarRelocateScript).CombinedOutput()
if err != nil {
printer.DefaultText.Print(string(out))
}
Expand Down