blob: fdfe5b8b59917231396a34a47bd23a77fd718595 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
# Copyright (C) 2017 Jakob Kreuze, All Rights Reserved.
#
# This file is part of Hypodermic.
#
# Hypodermic is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation, either version 3 of the License, or (at your
# option) any later version.
#
# Hypodermic is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with Hypodermic. If not, see <http://www.gnu.org/licenses/>.
"""Wrapper for the ptrace system call, since python-ptrace sucks."""
import ctypes
# TODO: Instantiate from binary path, as well.
class Process(object):
"""Process attached via ptrace.
Note:
The process is implicitly detached from upon destruction of this
object.
Args:
pid (int): The pid of the process to attach to.
Raises:
TypeError: If the pid argument is not an int.
OSError: If the pid cannot be attached to.
"""
def __init__(self, pid: int):
if not isinstance(pid, int):
raise TypeError("pid argument must be an int")
self._load_ffi_methods()
if self._attach(ctypes.c_int(pid)):
raise OSError("Could not attach to pid {}".format(pid))
self.pid = pid
def __del__(self):
if hasattr(self, "pid"):
self.detach()
def _load_ffi_methods(self):
# FIXME: How are we going to deal with the path?
self._so = ctypes.cdll.LoadLibrary("/tmp/libptracew.so")
self._attach = self._so.attach
self._detach = self._so.detach
self._cont = self._so.cont
def detach(self):
"""Explicitly detaches from the process.
Raises:
OSError: If the process cannot be detached from.
"""
if self._detach(ctypes.c_int(self.pid)):
raise OSError("Could not detach from pid {}".format(self.pid))
def cont(self):
"""Continues until the program is haulted.
Raises:
OSError: If the process cannot be continued.
"""
if self._cont(ctypes.c_int(self.pid)):
raise OSError("Could not continue")
|
