GDB: error detected on stdin

[Vikash Jain <vikashjin@gmail.com>]

Hi All,

I'm trying to pipe commands to gdb but I get the following messages.
Will it cause any problems? How do i resolve the same?

(gdb) Hangup detected on fd 0
error detected on stdin

Python Script
============
#!/usr/local/bin/python
import subprocess

proc=subprocess.Popen('gdb',shell=True,stdin=su
bprocess.PIPE,stdout=subprocess.PIPE,executable="/usr/local/bin/bash")
proc.stdin.write('help')
output=proc.communicate()[0]
print output

Script Log
==========
[XXX@test ~/CAT/example]$ python -u main.py
GNU gdb (GDB) 7.2.50.20110328-cvs
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i386-unknown-freebsd6.3".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
(gdb) Hangup detected on fd 0
error detected on stdin

Best Regards
Vikash Jain