AMIT BHATNAGAR wrote:
>
> # To subscribers of the xforms list from AMIT BHATNAGAR <amit@cs.dal.ca> :
>
> On Thu, 28 May 1998, Tristan Savatier wrote:
>
> > # To subscribers of the xforms list from Tristan Savatier <tristan@bok.net> :
> >
> > Another similar example is the MpegTV Player (mtv/mtvp).
>
> > The front-end (mtv) implements the GUI with Xforms.
> > The actual work of playing the MPEG stream is done by
>
> I have the source... but I can't seem to find where you actually fork()
> and exec mtvp. I have looked in mtv.c.... I figured thats where you would
> make the calls..
>
> or am I a dummy and just can't see? ;)
The fork is done in the call g2a_init().
The code of g2a_init() is provided only in object format,
but it contains something like:
int
g2a_init(
[...]
)
{
pid_t player_pid; /* pid of player process */
/* first, open the communication pipes */
[...]
/* second, fork a child process */
player_pid = fork();
if (player_pid == -1) {
return -1;
}
if (player_pid == 0) { /* this is the child (forked) process */
/*
* here the child process does an execvp() of mtvp
* with the right options. this will becomes the mtvp process...
*/
[...]
/* of course, the end of this block is never reached because
of the execvp() */
}
/* this is the mtv process... */
return 0;
}
--Tristan
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