From: jlnance@unity.ncsu.edu
To: linux-kernel@vger.kernel.org
Subject: socket vs pipe difference in /proc/pid/fd
Date: Wed, 18 Jun 2003 12:07:54 -0400 [thread overview]
Message-ID: <20030618160754.GA14475@ncsu.edu> (raw)
Hello All,
I am running 2.4.20 and have run into something that may be a bug.
I am hacking some stuff together to debug a distributed application.
As part of this, I attempt to open /proc/pid/fd/0 and /proc/pid/fd/1
for a process. These descriptors are a socket, created with the
socketpair() system call in the processes parent. When I try to
open these sockets, from the shell, I get a message about the open
failing due to the /proc/pid/fd/0 being an invalid devicde.
If I change the parent application so that it uses 2 pipes rather than
a socketpair, then I have no problems opening the /proc files.
Is this difference between pipes and sockets deliberate?
Thanks,
Jim
reply other threads:[~2003-06-18 15:53 UTC|newest]
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