| #!/usr/bin/env bash |
| set -euo pipefail |
| |
| if [[ $# -ne 2 ]]; then |
| echo "usage: $0 /path/to/brotli /path/to/libfclose_swap.so" >&2 |
| exit 2 |
| fi |
| |
| brotli_bin=$(readlink -f -- "$1") |
| swap_so=$(readlink -f -- "$2") |
| script_dir=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd) |
| workdir=$(mktemp -d) |
| ld_preload="$swap_so" |
| |
| cleanup() { |
| rm -rf -- "$workdir" |
| } |
| trap cleanup EXIT |
| |
| cp -- "$script_dir/plain.bin" "$script_dir/plain.bin.br" \ |
| "$script_dir/target.txt" "$workdir"/ |
| chmod 0644 "$workdir/plain.bin" |
| chmod 0644 "$workdir/plain.bin.br" |
| chmod 0600 "$workdir/target.txt" |
| |
| out_path="$workdir/out" |
| target_path="$workdir/target.txt" |
| |
| if ldd "$brotli_bin" | grep -q 'libasan'; then |
| asan_runtime=$(cc -print-file-name=libasan.so) |
| if [[ -f "$asan_runtime" ]]; then |
| ld_preload="$asan_runtime:$ld_preload" |
| fi |
| fi |
| if [[ -n "${LD_PRELOAD:-}" ]]; then |
| ld_preload="$ld_preload:$LD_PRELOAD" |
| fi |
| |
| env \ |
| BROTLI_SWAP_OUTPUT_ABS="$out_path" \ |
| BROTLI_SWAP_TARGET_ABS="$target_path" \ |
| LD_PRELOAD="$ld_preload" \ |
| "$brotli_bin" -d -o "$out_path" "$workdir/plain.bin.br" |
| |
| if [[ ! -L "$out_path" ]]; then |
| echo "output path was not swapped to a symlink" >&2 |
| exit 1 |
| fi |
| if [[ "$(stat -c '%a' "$target_path")" != "644" ]]; then |
| echo "target mode was not flipped to 0644" >&2 |
| exit 1 |
| fi |
| if ! cmp -s -- "$workdir/target.txt" "$script_dir/target.txt"; then |
| echo "target contents changed; expected metadata-only effect" >&2 |
| exit 1 |
| fi |
| |
| printf 'T-01 OK: target mode flipped to %s via post-close CopyStat path\n' \ |
| "$(stat -c '%a' "$target_path")" |
