On Jan 20, 2009, at 9:19 AM, srinivasan srinivas wrote:
Do parent process will have different file descriptor in it for each
subprocesses or paprent uses a single file descriptor for all?
I really want to know creation of each subprocess will occupy an
entry in parents'file descriptor table. B'cos if i create more than
200 subprocesses, i am getting 'Too many open files' error.
If you're on Unix, a command like lsof can be useful at a time like
this.
lsof = "ls open files"
If you're on Linux, there's the /proc tree to investigate.
----- Original Message ----
From: Mark Wooding <m...@distorted.org.uk>
To: python-list@python.org
Sent: Tuesday, 20 January, 2009 6:16:17 PM
Subject: Re: Doubts related to subprocess.Popen()
srinivasan srinivas <sri_anna...@yahoo.co.in> writes:
Does subprocess.Popen() count a new open file for each suprocess? I
mean does it occupy an entry in file descriptor table of parent
process? If so, wat is each file descriptor connected to?
On Unix, subprocess.Popen will use up a file descriptor in the parent
for each use of subprocess.PIPE. The descriptor in question is one
end
of a pipe; the child process holds the other end.
I guess the situation is similar on Windows, but I don't know for
sure.
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