#!/usr/bin/python
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"""Script for testing ganeti.utils.io (tests that require root access)"""

import os
import tempfile
import shutil
import errno
import grp
import pwd
import stat

from ganeti import constants
from ganeti import utils
from ganeti import compat
from ganeti import errors

import testutils


class TestWriteFile(testutils.GanetiTestCase):
  def setUp(self):
    testutils.GanetiTestCase.setUp(self)
    self.tmpdir = None
    self.tfile = tempfile.NamedTemporaryFile()
    self.did_pre = False
    self.did_post = False
    self.did_write = False

  def tearDown(self):
    testutils.GanetiTestCase.tearDown(self)
    if self.tmpdir:
      shutil.rmtree(self.tmpdir)

  def testFileUid(self):
    self.tmpdir = tempfile.mkdtemp()
    target = utils.PathJoin(self.tmpdir, "target")
    tuid = os.geteuid() + 1
    utils.WriteFile(target, data="data", uid=tuid + 1)
    self.assertFileUid(target, tuid + 1)
    utils.WriteFile(target, data="data", uid=tuid)
    self.assertFileUid(target, tuid)
    utils.WriteFile(target, data="data", uid=tuid + 1,
                    keep_perms=utils.KP_IF_EXISTS)
    self.assertFileUid(target, tuid)
    utils.WriteFile(target, data="data", keep_perms=utils.KP_ALWAYS)
    self.assertFileUid(target, tuid)

  def testNewFileUid(self):
    self.tmpdir = tempfile.mkdtemp()
    target = utils.PathJoin(self.tmpdir, "target")
    tuid = os.geteuid() + 1
    utils.WriteFile(target, data="data", uid=tuid,
                    keep_perms=utils.KP_IF_EXISTS)
    self.assertFileUid(target, tuid)

  def testFileGid(self):
    self.tmpdir = tempfile.mkdtemp()
    target = utils.PathJoin(self.tmpdir, "target")
    tgid = os.getegid() + 1
    utils.WriteFile(target, data="data", gid=tgid + 1)
    self.assertFileGid(target, tgid + 1)
    utils.WriteFile(target, data="data", gid=tgid)
    self.assertFileGid(target, tgid)
    utils.WriteFile(target, data="data", gid=tgid + 1,
                    keep_perms=utils.KP_IF_EXISTS)
    self.assertFileGid(target, tgid)
    utils.WriteFile(target, data="data", keep_perms=utils.KP_ALWAYS)
    self.assertFileGid(target, tgid)

  def testNewFileGid(self):
    self.tmpdir = tempfile.mkdtemp()
    target = utils.PathJoin(self.tmpdir, "target")
    tgid = os.getegid() + 1
    utils.WriteFile(target, data="data", gid=tgid,
                    keep_perms=utils.KP_IF_EXISTS)
    self.assertFileGid(target, tgid)

class TestCanRead(testutils.GanetiTestCase):
  def setUp(self):
    testutils.GanetiTestCase.setUp(self)
    self.tmpdir = tempfile.mkdtemp()
    self.confdUid = pwd.getpwnam(constants.CONFD_USER).pw_uid
    self.masterdUid = pwd.getpwnam(constants.MASTERD_USER).pw_uid
    self.masterdGid = grp.getgrnam(constants.MASTERD_GROUP).gr_gid

  def tearDown(self):
    testutils.GanetiTestCase.tearDown(self)
    if self.tmpdir:
      shutil.rmtree(self.tmpdir)

  def testUserCanRead(self):
    target = utils.PathJoin(self.tmpdir, "target1")
    f=open(target, "w")
    f.close()
    utils.EnforcePermission(target, 0400, uid=self.confdUid,
                            gid=self.masterdGid)
    self.assertTrue(utils.CanRead(constants.CONFD_USER, target))
    if constants.CONFD_USER != constants.MASTERD_USER:
      self.assertFalse(utils.CanRead(constants.MASTERD_USER, target))

  def testGroupCanRead(self):
    target = utils.PathJoin(self.tmpdir, "target2")
    f=open(target, "w")
    f.close()
    utils.EnforcePermission(target, 0040, uid=self.confdUid,
                            gid=self.masterdGid)
    self.assertFalse(utils.CanRead(constants.CONFD_USER, target))
    if constants.CONFD_USER != constants.MASTERD_USER:
      self.assertTrue(utils.CanRead(constants.MASTERD_USER, target))

    utils.EnforcePermission(target, 0040, uid=self.masterdUid+1,
                            gid=self.masterdGid)
    self.assertTrue(utils.CanRead(constants.MASTERD_USER, target))


if __name__ == "__main__":
  testutils.GanetiTestProgram()