search-struct.sh

#!/bin/bash

green="\e[1;32m";
yellow="\e[1;33m";
reset="\e[0m";

get_search_path(){
	OLD_IFS="${IFS}"
	IFS=''

	paths=()
	while read line;do
		if [[ "$line" =~ \ (/.+) ]];then
			paths+=("${BASH_REMATCH[1]}")
		fi
	done < <(echo | cpp -Wp,-v - 2>&1)
	IFS="${OLD_IFS}"

	echo "${paths[@]}"

}


if [ $# -ne 1 ];then
	printf "\n[*] search for c struct definition\n"
	printf "[+] example: $0 [dirent]\n\n";
	exit 0
fi

struct_name=$1
search_paths=($(get_search_path))

printf "[+] starting search...\n"

for((i=$((${#search_paths[@]}-1)); i>=0; i--));do
	pathname=${search_paths[i]}
	while read archive;do
		include_file=${archive:${#pathname}+1}
		struct_members=$(printf "#include <$include_file>\nstruct $struct_name x;" | cpp - 2>/dev/null | grep -Pzo '(?s)struct\s+'$struct_name'\s*{([^}]+)}')

		if [ -n "$struct_members" ];then
			printf "[+] struct found in: ${yellow}$archive${reset}\n\n"
			printf "${green}${struct_members}${reset}\n\n"
		fi

	done < <(find $pathname -type f -exec grep -HPlz  '(?s)struct '$struct_name'[\n ]*{([^}]+)}' {} \;)
done