Python subprocess.Popen pipe custom fd
I currently have this code that pipe stdout or stderr following the context:
def execteInstruction(cmd, outputNumber):
do_stdout = DEVNULL
do_stderr = DEVNULL
if outputNumber != 2:
do_stdout = subprocess.PIPE
else:
do_stderr = subprocess.PIPE
return subprocess.Popen(cmd, shell=True, stderr=do_stderr, stdout=do_stdout)
And then I read the result with communicate() . This works perfectly well except that I need to read a custom fd because I'm using subprocess to run a command that output on the file descriptor 26.
I have seen code that write to another fd than stdout or stderr, but none that read from a custom fd. So how can I pipe a custom fd from subprocess.Popen ?
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