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# python-pctrl -- python interface to the prctl function
# (c)2010 Dennis Kaarsemaker <dennis@kaarsemaker.net
# See COPYING for licensing details
import distutils.util
import glob
import os
import re
import signal
import sys
import subprocess
import unittest
curdir = os.path.dirname(__file__)
builddir = os.path.join(curdir, 'build', 'lib.%s-%s' % (distutils.util.get_platform(), sys.version[0:3]))
# Always run from the builddir
if not os.path.exists(builddir) or \
not os.path.exists(os.path.join(builddir, 'prctl.py')) or \
not os.path.exists(os.path.join(builddir, '_prctl.so')) or \
os.path.getmtime(os.path.join(curdir, 'prctl.py')) > os.path.getmtime(os.path.join(builddir, 'prctl.py')) or \
os.path.getmtime(os.path.join(curdir, '_prctlmodule.c')) > os.path.getmtime(os.path.join(builddir, '_prctl.so')):
print >>sys.stderr, "Please build the extension first, using ./setup.py build"
sys.exit(1)
sys.path.insert(0, builddir)
import prctl
import _prctl
class PrctlTest(unittest.TestCase):
# There are architecture specific tests
arch = os.uname()[4]
# prctl behaviour differs when root, so you should test as root and non-root
am_root = os.geteuid() == 0
def test_constants(self):
"""Test whether copying of constants works"""
self.assertEquals(prctl.ENDIAN_LITTLE, _prctl.PR_ENDIAN_LITTLE)
self.assertEquals(prctl.SECURE_NOROOT, _prctl.SECURE_NOROOT)
self.assertEquals(prctl.CAP_SYS_ADMIN, _prctl.CAP_SYS_ADMIN)
self.assertRaises(AttributeError, getattr, prctl, 'PR_ENDIAN_LITTLE')
self.assertRaises(AttributeError, getattr, prctl, 'PR_CAPBSET_READ')
self.assertRaises(AttributeError, getattr, prctl, 'CAPBSET_READ')
def test_capbset(self):
"""Test the get_capbset/set_capbset functions"""
self.assertEquals(prctl.capbset_read(prctl.CAP_FOWNER), True)
if self.am_root:
self.assertEqual(prctl.capbset_drop(prctl.CAP_FOWNER), None)
self.assertEqual(prctl.capbset_read(prctl.CAP_FOWNER), False)
else:
self.assertRaises(OSError, prctl.capbset_drop, prctl.CAP_MKNOD)
self.assertRaises(ValueError, prctl.capbset_read, 999)
def test_capbset_object(self):
"""Test manipulation of the capability bounding set via the capbset object"""
self.assertEqual(prctl.capbset.sys_admin, True)
if self.am_root:
prctl.capbset.kill = False
self.assertEqual(prctl.capbset.kill, False)
self.assertEqual(prctl.capbset.sys_admin, True)
prctl.capbset.drop("setgid", prctl.CAP_SETGID)
self.assertEqual(prctl.capbset.setgid, False)
caps = list(prctl.ALL_CAPS)
caps.remove(prctl.CAP_NET_RAW)
prctl.capbset.limit(*caps)
self.assertEqual(prctl.capbset.net_raw, False)
self.assertEqual(prctl.capbset.net_broadcast, True)
else:
def set_false():
prctl.capbset.kill = False
self.assertRaises(OSError, set_false)
def set_true():
prctl.capbset.kill = True
self.assertRaises(ValueError, set_true)
def unknown_attr():
prctl.capbset.foo = 1
self.assertRaises(AttributeError, unknown_attr)
def test_dumpable(self):
"""Test manipulation of the dumpable flag"""
prctl.set_dumpable(True)
self.assertEqual(prctl.get_dumpable(), True)
prctl.set_dumpable(False)
self.assertEqual(prctl.get_dumpable(), False)
self.assertRaises(TypeError, prctl.get_dumpable, "42")
def test_endian(self):
"""Test manipulation of the endianness setting"""
if self.arch == 'powerpc':
# FIXME untested
prctl.set_endian(prctl.ENDIAN_BIG)
self.assertEqual(prctl.get_endian(), prctl.ENDIAN_BIG)
prctl.set_endian(prctl.ENDIAN_LITTLE)
self.assertEqual(prctl.get_endian(), prctl.ENDIAN_LITTLE)
self.assertRaises(ValueError, prctl.set_endian, 999)
else:
self.assertRaises(OSError, prctl.get_endian)
self.assertRaises(OSError, prctl.set_endian)
def test_fpemu(self):
"""Test manipulation of the fpemu setting"""
if self.arch == 'ia64':
# FIXME - untested
prctl.set_fpemu(prctl.FPEMU_SIGFPE)
self.assertEqual(prctl.get_fpemu(), prctl.FPEMU_SIGFPE)
prctl.set_fpemu(prctl.FPEMU_NOPRINT)
self.assertEqual(prctl.get_fpemu(), prctl.FPEMU_NOPRINT)
self.assertRaises(ValueError, prctl.set_fpexc, 999)
else:
self.assertRaises(OSError, prctl.get_fpemu)
self.assertRaises(OSError, prctl.set_fpemu, prctl.FPEMU_SIGFPE)
def test_fpexc(self):
"""Test manipulation of the fpexc setting"""
if self.arch == 'powerpc':
# FIXME - untested
prctl.set_fpexc(prctl.FP_EXC_SW_ENABLE)
self.assertEqual(prctl.get_fpexc() & prctl.PR_FP_EXC_SW_ENABLE, prctl.PR_FP_EXC_SW_ENABLE)
self.assertRaises(ValueError, prctl.set_fpexc, 999)
else:
self.assertRaises(OSError, prctl.get_fpexc)
self.assertRaises(OSError, prctl.set_fpexc)
def test_keepcaps(self):
"""Test manipulation of the keepcaps setting"""
prctl.set_keepcaps(True)
self.assertEqual(prctl.get_keepcaps(), True)
prctl.set_keepcaps(False)
self.assertEqual(prctl.get_keepcaps(), False)
def test_name(self):
"""Test setting the process name"""
name = prctl.get_name().swapcase() * 16
prctl.set_name(name)
self.assertEqual(prctl.get_name(), name[:15])
def test_proctitle(self):
"""Test setting the prcess title, including too long titles"""
title = "This is a test!"
prctl.set_proctitle(title)
ps_output = subprocess.Popen(['ps', '-f', '-p', '%d' % os.getpid()],
stdout=subprocess.PIPE).communicate()[0]
self.assertTrue(ps_output.strip().endswith(title))
# This should not segfault but truncate
title2 = "And this is a test too!"
prctl.set_proctitle(title2)
ps_output = subprocess.Popen(['ps', '-f', '-p', '%d' % os.getpid()],
stdout=subprocess.PIPE).communicate()[0]
self.assertTrue(ps_output.strip().endswith(title2[:len(title)]))
def test_pdeathsig(self):
"""Test manipulation of the pdeathsig setting"""
self.assertRaises(ValueError, prctl.set_pdeathsig, 999)
self.assertEqual(prctl.get_pdeathsig(), 0)
prctl.set_pdeathsig(signal.SIGINT)
self.assertEqual(prctl.get_pdeathsig(), signal.SIGINT)
def test_seccomp(self):
"""Test manipulation of the seccomp setting"""
self.assertEqual(prctl.get_seccomp(), False)
result = os.fork()
if result == 0:
# In child
prctl.set_seccomp(True)
# This should kill ourselves
open('/etc/resolv.conf')
# If not, kill ourselves anyway
sys.exit(0)
else:
pid, result = os.waitpid(result, 0)
self.assertTrue(os.WIFSIGNALED(result))
self.assertEqual(os.WTERMSIG(result), signal.SIGKILL)
def test_securebits(self):
"""Test manipulation of the securebits flag"""
self.assertEqual(prctl.get_securebits(), 0)
if os.geteuid() == 0:
prctl.set_securebits(1 << prctl.SECURE_KEEP_CAPS)
self.assertEqual(prctl.get_securebits(), 1 << prctl.SECURE_KEEP_CAPS)
else:
self.assertRaises(OSError, prctl.set_securebits, 1 << prctl.SECURE_KEEP_CAPS)
def test_securebits_obj(self):
"""Test manipulation of the securebits via the securebits object"""
self.assertEqual(prctl.securebits.noroot, False)
if os.geteuid() == 0:
prctl.securebits.noroot = True
self.assertEqual(prctl.securebits.noroot, True)
self.assertEqual(prctl.securebits.no_setuid_fixup, False)
prctl.securebits.noroot_locked = True
def set_false():
prctl.securebits.noroot = False
self.assertRaises(OSError, set_false)
else:
def set_true():
prctl.securebits.noroot = True
self.assertRaises(OSError, set_true)
def test_timing(self):
"""Test manipulation of the timing setting"""
self.assertRaises(OSError, prctl.set_timing, prctl.TIMING_TIMESTAMP);
self.assertEquals(prctl.get_timing(), prctl.TIMING_STATISTICAL)
prctl.set_timing(prctl.TIMING_STATISTICAL)
self.assertEquals(prctl.get_timing(), prctl.TIMING_STATISTICAL)
def test_tsc(self):
"""Test manipulation of the timestamp counter flag"""
if re.match('i.86', self.arch):
prctl.set_tsc(prctl.TSC_SIGSEGV)
self.assertEquals(prctl.get_tsc(), prctl.TSC_SIGSEGV)
prctl.set_tsc(prctl.TSC_ENABLE)
self.assertEquals(prctl.get_tsc(), prctl.TSC_ENABLE)
else:
# FIXME untested
self.assertRaises(OSError, prctl.get_tsc)
self.assertRaises(OSError, prctl.set_tsc, prctl.TSC_ENABLE)
def test_unalign(self):
"""Test manipulation of the unalogned access setting"""
if self.arch in ('ia64', 'parisc', 'powerpc', 'alpha'):
# FIXME untested
prctl.set_unalign(prctl.UNALIGN_NOPRINT)
self.assertEquals(prctl.get_unalign(), prctl.UNALIGN_NOPRINT)
prctl.set_unalign(prctl.UNALIGN_SIGBUS)
self.assertEquals(prctl.get_unalign(), prctl.UNALIGN_SIGBUS)
else:
self.assertRaises(OSError, prctl.get_unalign)
self.assertRaises(OSError, prctl.set_unalign, prctl.UNALIGN_NOPRINT)
def test_getcaps(self):
"""Test the get_caps function"""
self.assertEquals(prctl.get_caps(), {prctl.CAP_EFFECTIVE: {}, prctl.CAP_INHERITABLE: {}, prctl.CAP_PERMITTED: {}})
self.assertEquals(prctl.get_caps((prctl.CAP_SYS_ADMIN, prctl.ALL_FLAGS),(prctl.CAP_NET_ADMIN, prctl.CAP_EFFECTIVE)),
{prctl.CAP_EFFECTIVE: {prctl.CAP_SYS_ADMIN: self.am_root, prctl.CAP_NET_ADMIN: self.am_root},
prctl.CAP_INHERITABLE: {prctl.CAP_SYS_ADMIN: False},
prctl.CAP_PERMITTED: {prctl.CAP_SYS_ADMIN: self.am_root}})
self.assertEquals(prctl.get_caps(([prctl.CAP_SYS_ADMIN,prctl.CAP_NET_ADMIN], [prctl.CAP_EFFECTIVE,prctl.CAP_PERMITTED])),
{prctl.CAP_EFFECTIVE: {prctl.CAP_SYS_ADMIN: self.am_root, prctl.CAP_NET_ADMIN: self.am_root},
prctl.CAP_INHERITABLE: {},
prctl.CAP_PERMITTED: {prctl.CAP_SYS_ADMIN: self.am_root, prctl.CAP_NET_ADMIN: self.am_root}})
self.assertRaises(KeyError, prctl.get_caps, (prctl.CAP_SYS_ADMIN,'abc'))
def fail():
prctl.get_caps((1234,prctl.ALL_FLAGS))
self.assertRaises(ValueError, fail)
def test_setcaps(self):
"""Test the setcaps function"""
if self.am_root:
prctl.set_caps((prctl.CAP_SETUID, prctl.ALL_FLAGS, True))
else:
self.assertRaises(OSError, prctl.set_caps, (prctl.CAP_SETUID, prctl.ALL_FLAGS, True))
self.assertEqual(prctl.get_caps((prctl.CAP_SETUID, prctl.ALL_FLAGS)),
{prctl.CAP_EFFECTIVE: {prctl.CAP_SETUID: self.am_root},
prctl.CAP_PERMITTED: {prctl.CAP_SETUID: self.am_root},
prctl.CAP_INHERITABLE: {prctl.CAP_SETUID: self.am_root}})
prctl.set_caps((prctl.CAP_SETUID, prctl.ALL_FLAGS, False))
self.assertEqual(prctl.get_caps((prctl.CAP_SETUID, prctl.ALL_FLAGS)),
{prctl.CAP_EFFECTIVE: {prctl.CAP_SETUID: False},
prctl.CAP_PERMITTED: {prctl.CAP_SETUID: False},
prctl.CAP_INHERITABLE: {prctl.CAP_SETUID: False}})
self.assertRaises(OSError, prctl.set_caps, (prctl.CAP_SETUID, prctl.ALL_FLAGS, True))
capabilities = [x[4:].lower() for x in dir(_prctl) if x.startswith('CAP_')]
def test_capabilities_objects(self):
for cap in self.capabilities:
if cap in ('all','effective','permitted','inheritable','setuid'):
continue
self.assertEquals(getattr(prctl.cap_effective, cap), self.am_root)
self.assertEquals(getattr(prctl.cap_permitted, cap), self.am_root)
self.assertEquals(getattr(prctl.cap_inheritable, cap), False)
for cap in ['dac_override','mac_override','net_raw']:
if self.am_root:
setattr(prctl.cap_effective, cap, False)
setattr(prctl.cap_permitted, cap, False)
setattr(prctl.cap_inheritable, cap, False)
self.assertRaises(OSError, setattr, prctl.cap_effective, cap, True)
self.assertRaises(OSError, setattr, prctl.cap_permitted, cap, True)
if self.am_root:
setattr(prctl.cap_inheritable, cap, True)
else:
self.assertRaises(OSError, setattr, prctl.cap_inheritable, cap, True)
if self.am_root:
prctl.cap_effective.drop('linux_immutable', 'sys_boot', 'sys_pacct')
self.assertEqual(prctl.cap_effective.linux_immutable, False)
self.assertEqual(prctl.cap_effective.sys_boot, False)
self.assertEqual(prctl.cap_effective.sys_pacct, False)
caps = list(prctl.ALL_CAPS)
caps.remove(prctl.CAP_SYS_NICE)
prctl.cap_effective.limit(*caps)
self.assertEqual(prctl.cap_effective.sys_nice, False)
def test_captoname(self):
self.assertEqual(_prctl.cap_to_name(prctl.CAP_SYS_ADMIN), 'sys_admin')
if __name__ == '__main__':
unittest.main()
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