A slightly changed version of check_elf_alignment.sh which fails with exit code and prints proper on macOS

check_elf_alignment.sh

#!/bin/bash
progname="${0##*/}"
progname="${progname%.sh}"

# usage: check_elf_alignment.sh [path to *.so files|path to *.apk]

cleanup_trap() {
  if [ -n "${tmp}" ] && [ -d "${tmp}" ]; then
    rm -rf "${tmp}"
  fi
  exit $1
}

usage() {
  echo "Host side script to check the ELF alignment of shared libraries."
  echo "Shared libraries are reported ALIGNED when their ELF regions are"
  echo "16 KB or 64 KB aligned. Otherwise they are reported as UNALIGNED."
  echo
  echo "Usage: ${progname} [input-path|input-APK|input-APEX]"
}

if [ $# -ne 1 ]; then
  usage
  exit 1
fi

case $1 in
  --help | -h | -\?)
    usage
    exit 0
    ;;
  *)
    dir="$1"
    ;;
esac

if ! [ -f "$dir" ] && ! [ -d "$dir" ]; then
  echo "Invalid file: $dir" >&2
  exit 1
fi

if [[ "$dir" == *.apk ]]; then
  trap 'cleanup_trap' EXIT

  echo
  echo "Recursively analyzing $dir"
  echo

  if zipalign --help 2>&1 | grep -q "\-P <pagesize_kb>"; then
    echo "=== APK zip-alignment ==="
    zipalign -v -c -P 16 4 "$dir" | egrep 'lib/arm64-v8a|lib/x86_64|Verification'
    echo "========================="
  else
    echo "NOTICE: Zip alignment check requires build-tools version 35.0.0-rc3 or higher."
    echo "  You can install the latest build-tools by running the below command"
    echo "  and updating your \$PATH:"
    echo
    echo "    sdkmanager \"build-tools;35.0.0-rc3\""
  fi

  dir_filename=$(basename "$dir")
  tmp=$(mktemp -d -t "${dir_filename%.apk}_out_XXXXX")
  unzip "$dir" lib/* -d "$tmp" >/dev/null 2>&1
  dir="$tmp"
fi

if [[ "$dir" == *.apex ]]; then
  trap 'cleanup_trap' EXIT

  echo
  echo "Recursively analyzing $dir"
  echo

  dir_filename=$(basename "$dir")
  tmp=$(mktemp -d -t "${dir_filename%.apex}_out_XXXXX")
  deapexer extract "$dir" "$tmp" || { echo "Failed to deapex." && exit 1; }
  dir="$tmp"
fi

RED="\033[31m"
GREEN="\033[32m"
ENDCOLOR="\033[0m"

unaligned_critical_libs=()

echo
echo "=== ELF alignment ==="

base_dir="$dir"
matches=$(find "$dir" -type f)
IFS=$'\n'
for match in $matches; do
  [[ "$match" == *.apk ]] && echo "WARNING: doesn't recursively inspect .apk file: $match"
  [[ "$match" == *.apex ]] && echo "WARNING: doesn't recursively inspect .apex file: $match"

  [[ $(file "$match") == *"ELF"* ]] || continue

  res=$(objdump -p "$match" | grep LOAD | awk '{ print $NF }' | head -1)
  rel_path="${match#$base_dir/}"

  if [[ $res =~ 2\*\*([0-9]+) ]]; then
    pow="${BASH_REMATCH[1]}"
    alignment_kb=$(( (1 << pow) / 1024 ))

    if (( pow >= 14 )); then
      printf "%b\n" "${rel_path}: ${GREEN}ALIGNED${ENDCOLOR} (${alignment_kb} KB)"
    else
      printf "%b\n" "${rel_path}: ${RED}UNALIGNED${ENDCOLOR} (${alignment_kb} KB)"
      # Only count unaligned files from critical ABIs
      if [[ "$rel_path" == lib/arm64-v8a/* || "$rel_path" == lib/x86_64/* ]]; then
        unaligned_critical_libs+=("$rel_path")
      fi
    fi
  else
    printf "%b\n" "${rel_path}: ${RED}UNKNOWN ALIGNMENT${ENDCOLOR} (${res})"
    # Be conservative and count it if it’s under the relevant ABIs
    if [[ "$rel_path" == lib/arm64-v8a/* || "$rel_path" == lib/x86_64/* ]]; then
      unaligned_critical_libs+=("$rel_path")
    fi
  fi
done

if [ ${#unaligned_critical_libs[@]} -gt 0 ]; then
  printf "%b\n" "${RED}Found ${#unaligned_critical_libs[@]} unaligned critical libs (arm64-v8a/x86_64).${ENDCOLOR}"
  echo "====================="
  exit 1
elif [ -n "${dir_filename}" ]; then
  echo "ELF Verification Successful"
  echo "====================="
fi