Skip to content

Instantly share code, notes, and snippets.

@pudquick
Last active June 10, 2024 04:01
Show Gist options
  • Save pudquick/581a71425439f2cf8f09 to your computer and use it in GitHub Desktop.
Save pudquick/581a71425439f2cf8f09 to your computer and use it in GitHub Desktop.
Calling sysctl from python via ctypes
from ctypes import CDLL, c_uint, byref, create_string_buffer
from ctypes.util import find_library
libc = CDLL(find_library("c"))
def sysctl(name, isString=True):
size = c_uint(0)
# Find out how big our buffer will be
libc.sysctlbyname(name, None, byref(size), None, 0)
# Make the buffer
buf = create_string_buffer(size.value)
# Re-run, but provide the buffer
libc.sysctlbyname(name, buf, byref(size), None, 0)
if isString:
return buf.value
else:
return buf.raw
@mlazovjp
Copy link

@mlazovjp Try adding the b prefix to the option names, e.g. b"hw.model"

Kentzo,

Thanks for the assist. I figured it was something I was overlooking. I can confirm that this works properly now after making that change.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment