OpenEuphoria

RE: J. Browns Pipe library error

• Posted by "Elliott S. de Andrade" <quantum_analyst at hotmail.com> Dec 22, 2003
• 356 views

Try using os_close() on the last three values returned from popen. These 
would be pin, pout, and perr in your code.

>From: Chris Burch <chriscrylex at aol.com>
>Subject: J. Browns Pipe library error
>
>Hi
>
>Try this
>
>--with trace
>include graphics.e
>include pipeio.e
>
>sequence line
>clear_screen()
>
>puts(1, "Debug 1\n")
>
>sequence data
>integer pid, pin, pout, perr
>object c
>
>while(1) do
>
>data = popen("/home/crylex/euphoria/bin/exu", {"./subprocess1.exu"})
>--data = popen("/bin/echo", {"Hello", "jobby"})
>
>pid = data[1]
>pin = data[2]
>pout = data[3]
>perr = data[4]
>
>puts(1,"Debug 2\n")
>
>c = os_read(pout, 256)
>
>puts(1,"Debug 3\n")
>
>if atom(c) then
>     printf(1, "Failed on read with error %x", os_errno)
>     abort(1)
>end if
>
>puts(1, c)
>
>--have to stop the program in order to see the output!
>--line = gets(0)
>
>VOID = os_kill(pid, 15)
>--close(pout)
>
>end while
>
>
>Eventually you'll get Errno = 24
>
>Little c prog to get errno string gives
>
>Too many open files
>
>Doesn't seem to be a way to close open pipes in this lib (is an os_close
>function, but this needs a handle, and can't see any way of getting a
>handle)
>
>Any ideas anyone
>
>Regards
>
>Chris
>