lkml.org 
[lkml]   [2012]   [Apr]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Hang opening a pipe written to by a child, with SIGCHLD
On Mon, Apr 02, 2012 at 10:49:10AM -0400, Shea Levy wrote:
> On 04/02/2012 10:46 AM, Lluís Batlle i Rossell wrote:
> >Can anyone reproduce this?
>
> I've reproduced this on my system as well (3.3). No idea about cause though.
>

Thank you Shea,

with a little change, adding "sleep 0.1" makes it hang early in all (few)
linuces I tried: Let me know if this helps you reproduce the problem.

As before, hangs under strace, does not hang under 'strace -f'. Sorry if I'm
misunderstanding something.

New script:
----------
#!/bin/sh
PIPE=/tmp/pipe

rm -f $PIPE
mkfifo $PIPE
set -x

spawn() {
sleep 0.1
echo DONE > $PIPE
}
spawn &

while true; do
while read LINE < $PIPE; do
echo $LINE
spawn &
done
done
-----------
Regards,
Lluís.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2012-04-02 20:53    [from the cache]
©2003-2011 Jasper Spaans