Intercept C function call from Python [closed]

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Is there a way to intercept a C function call on a binary (e.g: write to a file) in Python?

I need to execute the binary on Linux from python and capture the output that it writes to the log file. The log file name is unpredictable.

Answer 1

The way to go is to create a named pipe. If logfile is the name of your logfile:

import os
import subprocess

LOGFILE = 'somefile.log'

if not os.path.exists(LOGFILE):
    os.mkfifo(LOGFILE)
proc = subprocess.Popen([YOUR_PROGRAM])
with open(LOGFILE) as log:
    data = log.read()  # process your data

proc.wait()