#!/usr/bin/env python
import logging
import os
import re
import shutil
import signal
import stat
import subprocess
import sys
import tempfile
import unittest
from subprocess import Popen
from unittest import TestCase

import lief
from lief.ELF import Segment
from utils import get_sample

lief.logging.set_level(lief.logging.LOGGING_LEVEL.INFO)

CURRENT_DIRECTORY = os.path.dirname(os.path.abspath(__file__))

class TestChangeInterpreter(TestCase):
    def setUp(self):
        self.logger = logging.getLogger(__name__)
        self.tmp_dir = tempfile.mkdtemp(suffix='_lief_test_add_segment')
        self.logger.debug("temp dir: {}".format(self.tmp_dir))


    @unittest.skipUnless(sys.platform.startswith("linux"), "requires Linux")
    def test_misc(self):
        list_binaries = [
        '/usr/bin/ls',
        '/usr/bin/ssh',
        '/usr/bin/nm',
        '/usr/bin/cp',
        '/usr/bin/find',
        '/usr/bin/file',
        ]
        for binary in list_binaries:
            self.logger.debug("Test with '{}'".format(binary))
            self.change_interpreter(binary)


    def change_interpreter(self, target):
        if not os.path.isfile(target):
            return

        name = os.path.basename(target)
        target = lief.parse(target)
        new_interpreter = os.path.join(self.tmp_dir, os.path.basename(target.interpreter))
        if not os.path.islink(new_interpreter):
            os.symlink(target.interpreter, new_interpreter)
        target.interpreter = new_interpreter
        output = os.path.join(self.tmp_dir, "{}.interpreter".format(name))
        target.write(output)

        st = os.stat(output)
        os.chmod(output, st.st_mode | stat.S_IEXEC)

        p = Popen(output, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
        stdout, _ = p.communicate()

        self.logger.debug(stdout.decode("utf8"))
        self.assertNotEqual(p.returncode, -signal.SIGSEGV, "{} segfault!!!!".format(name))


    def tearDown(self):
        # Delete it
        if os.path.isdir(self.tmp_dir):
            shutil.rmtree(self.tmp_dir)

if __name__ == '__main__':

    root_logger = logging.getLogger()
    root_logger.setLevel(logging.DEBUG)

    ch = logging.StreamHandler()
    ch.setLevel(logging.DEBUG)
    root_logger.addHandler(ch)

    unittest.main(verbosity=2)