On Wed, Aug 20, 2008 at 3:54 PM, dave selby <[EMAIL PROTECTED]> wrote:
> Hi All,
>
>
> I am trying to get a named pipe working, I have already made a fifo
>
> [EMAIL PROTECTED]:/usr/local/bin$ ls -al /home/dave/kmotion2/www/pipe_func
> prw-rw---- 1 dave www-data 0 2008-08-20 20:25
> /home/dave/kmotion2/www/pipe_func
> [EMAIL PROTECTED]:/usr/local/bin$
>
> but when I execute my test code to add an item to the fifo ...
>
> func = '199'
> www_dir = '/home/dave/kmotion2/www'
> print '%s/pipe_func' % www_dir
> pipeout = os.open('%s/pipe_func' % www_dir, os.O_WRONLY)
> print 'xxx'
> os.write(pipeout, func)
> os.close(pipeout)
>
> I get the path printed out & then the script hangs silently on pipeout
> = os.open('%s/pipe_func' % www_dir, os.O_WRONLY)
>
> Can anyone tell me why ? I expected it to return immediately
See this informative thread:
http://mail.python.org/pipermail/python-list/2006-August/396499.html
Summary: opening a pipe for write blocks until it is also opened for read.
Kent
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