execl() and inheritied streams

Erik Johnson ej
Tue Sep 28 23:24:56 CEST 2004

Thanks for your kind and helpful reply, Donn! :)


"Donn Cave" <donn at u.washington.edu> wrote in message
news:donn-209231.13080428092004 at gnus01.u.washington.edu...

> sys.stdin etc. are objects that live in the Python interpreter.
> Basically, they're a buffer plus a file descriptor, plus some
> functions.  Similar to the C stdio FILE object, which in fact
> is underneath the Python fileobject.
> Objects in interpreter memory space do not survive an exec.
> You want to remap the standard UNIX file descriptors 0 (input),
> 1 (output) and 2 (error).  They are the system level I/O streams
> that will survive exec.
> Like,
>    fd = os.open(filename, os.O_WRONLY|os.O_CREAT)
>    os.dup2(fd, 1)
>    os.dup2(fd, 2)
>    os.close(fd)
>    os.execve(...

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