Messages in this thread |  | | Date | Wed, 14 Aug 2002 11:19:03 -0700 | Subject | Problem : can't make pipe non-blocking on 2.5.X | From | Jean Tourrilhes <> |
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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 ?
------------- Setup ------------------------ Kernel : 2.5.25 fails (but 2.4.20-pre2 works) Distrib : Debian 3.0 libc : 2.2.5 ------------- Test program ----------------- #include <unistd.h> #include <fcntl.h> #include <errno.h> #include <stdio.h>
int main() { int trigger_pipe[2]; int err; int flags;
pipe(trigger_pipe);
err = fcntl(trigger_pipe[0], F_GETFL, &flags); 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 --------------------------------------------
Have fun...
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