Messages in this thread | ![/](/images/icornerl.gif) | | Date | Sun, 11 Mar 2001 03:18:27 +0100 | From | Alex Baretta <> | Subject | Re: Possible bug with poll syscall |
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Alex Baretta wrote: > > Alex Baretta wrote: > > > > I am using poll with the POLLIN flag to wait for connection > > requests on a set of listening sockets in a server process. > > Although clients attempt to connect to those sockets, poll does > > returns zero after the expiration of the timeout. ...
There was a bug in my code. I am unable to find it, but I wrote a minimal to case to prove my point, and actually I proved myself wrong. Test case follows. If I ever find the time I'll try to experiment and discover why in "the real thing" poll did not work for me.
#include <sys/poll.h> #include <sys/socket.h> #include <netinet/in.h> #include <stdio.h>
int main(int argc, char **argv) { struct pollfd fds; int res1, res2, nevents; struct sockaddr_in sockaddr;
fds.fd = socket(PF_INET, SOCK_STREAM, 0); fds.events = POLLIN; sockaddr.sin_family = AF_INET; sockaddr.sin_addr.s_addr = htonl(INADDR_ANY); sockaddr.sin_port = htons(50000); res1 = bind(fds.fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)); res2 = listen(fds.fd, 20);
if (fds.fd == -1 || res1 == -1 || res2 == -1) { fprintf(stderr, "The program failed miserably.\n"); exit(1); } fprintf(stderr, "I'm about to suspend myself on a poll syscall!\n"); nevents = poll(&fds, 1, -1); fprintf(stderr, "Waking up: nevents = %d\n", nevents); return 0; }; - 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/
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