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;
};
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This archive was generated by hypermail 2b29 : Sat Mar 10 2001 - 21:33:14 EST