Comment 5 for bug 405962

I found the code of tools/misc.py

@function def exec_command_pipe(name, *args):

return os.popen2(cmd, 'b')

and I found the follow code in addons/base/ir/workflow/print_instance.py

        input, output = tools.exec_command_pipe(*args) #here ref:http://docs.python.org/library/popen2.html
        input.write(ps_string)
        input.close()
        self.result = output.read()
        output.close()

@ python manual says: 1st parameter is stdout, 2nd parameter is stdin.

Is it a bug?

and I try test.py @WinXP v5.0.6

import os

cmd = r'ps2pdf.bat - -'
(output, input) = os.popen2(cmd, 'b')

fp = file('test.ps', 'r')
fpContent = ''.join(fp.readlines())
fp.close()

input.write(fpContent+'\n')
input.close()
result = output.read()
output.close()
print result

I catch a exception:

Traceback (most recent call last):
  File "test.py", line 10, in <module>
    input.write(fpContent+'\n')
IOError: [Errno 9] Bad file descriptor