get pid from popen3 or get redirection in execl

[Yu Wang]

Sorry for this stupid question. I've found at least two ways to resolve it.
use sys.stderr, and dup2() function both work for it.


Yu Wang wrote:
> Hi,all
>   Does "execl", or whatever this family, support redirection of output?
>   Say, I have a script: ( on my Linux7.2,C shell environment,with 
> python2.2.1)
> 
> command="somecommand"
> arg="-i somefile > output file"
> execl(command,arg)
> 
> what's wrong with this?
> 
> And,
>    how could I get child pid from "popen3(somecommand)".
> 
> Thanks to you.
> Regards.
> 
>