Re: Problem : can't make pipe non-blocking on 2.5.X

[OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>]

Jean Tourrilhes <jt@bougret.hpl.hp.com> writes:

> 	Hi,
> 
> 	I've got the following problem : I can't make a pipe
> non-blocking with 2.5.25.
> 	The various man pages don't mention anything
> about it (actually, the "fifo" man page say that non-blocking mode
> should succeed). And it seems to work fine on 2.4.20.
> 	Sorry if this has already been reported and fixed, but I
> quicly searched the changelog and archive and found nothing.
> 
> 	So, who should I complain to ?
> 

[...]

>   err = fcntl(trigger_pipe[0], F_GETFL, &flags);

F_GETFL should be,
    flags = fcntl(trigger_pipe[0], F_GETFL, 0);

>   fprintf(stderr, "GET FLAGS : %d - %X\n", err, flags);
>   if(err >= 0)
>     {
>       flags |= O_NONBLOCK;
>       err = fcntl(trigger_pipe[0], F_SETFL, flags);
>       fprintf(stderr, "SET FLAGS : %d - %d\n", err, errno);
>     }
>   return(0);
> }
> ------------- Output 2.5.25 ----------------
> GET FLAGS : 0 - 40045F18
> SET FLAGS : -1 - 22
> ------------- Output 2.4.20-pre2 -----------
> GET FLAGS : 0 - 40043F18
> SET FLAGS : 0 - 0
> --------------------------------------------

Looks like effect of different implement of O_DIRECT(0x40000).
Thanks.
-- 
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>