fork/exec with input redirection

[hdante]

On Nov 26, 7:58 pm, "Dan Upton" <up... at virginia.edu> wrote:
> I have a Python script that does a fork/exec, so the parent process
> can get the child's PID and monitor /proc/PID/stat (on a CentOS
> system).  Most of my processes' command lines are straightforward
> enough to do this with, but I have a handful that use < on the command
> line, eg
>
> ./gobmk_base.linux_x86 --quiet --mode gtp < 13x13.tst
>
> The only thing I could really think of to try was
>
>    os.execv("./gobmk_base.linux_x86", ["./gobmk_base.linux_x86",
> "--quiet", "--mode", "gtp", "<", "13x13.tst"])
>
> but this apparently doesn't work.  Is there some other way to
> accomplish what I'm going for?
>
> Thanks,
> -dan

 IIRC,

 if os.fork() == 0:
   new_stdin = os.open('13x13.tst')
   os.dup2(new_stdin, sys.stdin.fileno())
   os.close(new_stdin)
   os.execv("./gobmk_base.linux_x86", ["./gobmk_base.linux_x886", "--
quiet", "--mode", "gtp"])