Re: obtaining process exit code from popen()

["John D. Blair" <jdb@...>]

On Mon, 2009-06-08 at 21:47 +0200, Florian Weimer wrote:
> * John D. Blair:
> 
> > I'm not sure I understand... popen() doesn't return a process object, it
> > returns a file handle.  Also, I don't see wait() or a process object in
> > the lua docs anyplace.  Is it part of an add-on module?  I don't think
> > there's any concept of process in ANSI-C, which is what the un-adorned
> > lua interpreter targets.
> 
> popen() is from POSIX, not ISO C.  pclose() does return the exit
> status of the child process.

That's not true about pclose(), at least not on Linux:

>From the Linux popen() man page, which also describes pclose():

       The pclose() function waits for the associated process to
terminate and returns the exit status of the command as returned by
wait4(2).