linux_clone.py

import ctypes
from ctypes import CDLL, CFUNCTYPE, c_int, c_void_p, c_char_p


libc = CDLL('libc.so.6')
CSIGNAL = 0x000000ff
CLONE_VM = 0x00000100
CLONE_FS = 0x00000200
CLONE_FILES = 0x00000400
CLONE_SIGHAND = 0x00000800
CLONE_PIDFD = 0x00001000
CLONE_PTRACE = 0x00002000
CLONE_VFORK = 0x00004000
CLONE_PARENT = 0x00008000
CLONE_THREAD = 0x00010000
CLONE_NEWNS = 0x00020000
CLONE_SYSVSEM = 0x00040000
CLONE_SETTLS = 0x00080000
CLONE_PARENT_SETTID = 0x00100000
CLONE_CHILD_CLEARTID = 0x00200000
CLONE_DETACHED = 0x00400000
CLONE_UNTRACED = 0x00800000
CLONE_CHILD_SETTID = 0x01000000
CLONE_NEWCGROUP = 0x02000000
CLONE_NEWUTS = 0x04000000
CLONE_NEWIPC = 0x08000000
CLONE_NEWUSER = 0x10000000
CLONE_NEWPID = 0x20000000
CLONE_NEWNET = 0x40000000
CLONE_IO = 0x80000000


def clone(main, st_size=1024, flags=0):
    main_f = CFUNCTYPE(c_int)(main)
    stack = c_char_p(bytes(st_size * 1024))
    return libc.clone(
            main_f,
            c_void_p(ctypes.cast(stack, c_void_p).value + st_size * 1024),
            flags)