54 lines
874 B
Python
54 lines
874 B
Python
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DEVICE = "/dev/variable_monitor"
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import os, sys
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import ctypes
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from ctypes import *
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import fcntl
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file_desc = None
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def open_device():
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global file_desc
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if file_desc is None:
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try:
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file_desc = os.open(DEVICE, os.O_RDWR)
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except OSError:
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print(f"Can't open device file: {DEVICE}")
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return -1
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return 0
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def close_device():
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global file_desc
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if file_desc is None:
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print(f"Device not open: {DEVICE}, {file_desc}")
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return file_desc
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os.close(file_desc)
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file_desc = None
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return 0
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class ioctl_pid(Structure):
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_fields_ = [
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("pid", c_int),
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]
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def ioctl(pid: int):
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pidc = ioctl_pid(
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pid=c_int(pid),
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)
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ret = fcntl.ioctl(file_desc, 0, pidc)
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if ret == 0:
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print("success")
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pid = int(sys.argv[1])
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open_device()
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ioctl(pid)
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close_device()
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