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#!/usr/bin/env bash
set -o errexit -o nounset -o pipefail
script_name="$( basename -- "${BASH_SOURCE[0]}" )"
readonly script_name
elf_file_class() {
local path
for path; do
od --address-radix=n --skip-bytes=4 --read-bytes=1 --format=x1 -- "$path"
done
}
arch_to_file_class() {
local arch
for arch; do
case "$arch" in
x86)
echo '01'
;;
x64)
echo '02'
;;
*)
echo "$script_name: unsupported architecture: $arch" >&2
return 1
;;
esac
done
}
main() {
if [ "$#" -ne 2 ]; then
echo "usage: $script_name BIN_PATH ARCH" >&2
return 1
fi
local path="$1"
local arch="$2"
local expected
expected=" $( arch_to_file_class "$arch" )"
local actual
actual="$( elf_file_class "$path" )"
if [ "$expected" = "$actual" ]; then
echo "$script_name: file '$path' matches architecture '$arch'"
else
echo "$script_name: file '$path' DOES NOT match architecture '$arch'"
echo "$script_name: expected ELF file class '$expected', actual file class is '$actual'" >&2
return 1
fi
}
main "$@"
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