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select: align poll emulation to return all relevant events 

The poll emulation via select already consumes POLLRDNORM,
POLLWRNORM and POLLRDBAND as input events. Therefore it
should also return them as output events if signaled.

Also fix indentation in input event handling block.

Assisted-by: Jay Satiro
Reviewed-by: Daniel Stenberg

Replaces #5852
Closes #5883
This commit is contained in:
Marc Hoersken 2020-08-31 10:49:20 +02:00
parent ce56cc8b11
commit 20d74b7393
No known key found for this signature in database
GPG Key ID: 61E03CBED7BC859E
1 changed files with 20 additions and 8 deletions
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28
lib/select.c
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@ -378,7 +378,7 @@ int Curl_poll(struct pollfd ufds[], unsigned int nfds, timediff_t timeout_ms)
if(ufds[i].revents & POLLHUP)
ufds[i].revents |= POLLIN;
if(ufds[i].revents & POLLERR)
ufds[i].revents |= (POLLIN|POLLOUT);
ufds[i].revents |= POLLIN|POLLOUT;
}
#else /* HAVE_POLL_FINE */
@ -394,7 +394,7 @@ int Curl_poll(struct pollfd ufds[], unsigned int nfds, timediff_t timeout_ms)
continue;
VERIFY_SOCK(ufds[i].fd);
if(ufds[i].events & (POLLIN|POLLOUT|POLLPRI|
POLLRDNORM|POLLWRNORM|POLLRDBAND)) {
POLLRDNORM|POLLWRNORM|POLLRDBAND)) {
if(ufds[i].fd > maxfd)
maxfd = ufds[i].fd;
if(ufds[i].events & (POLLRDNORM|POLLIN))
@ -421,12 +421,24 @@ int Curl_poll(struct pollfd ufds[], unsigned int nfds, timediff_t timeout_ms)
ufds[i].revents = 0;
if(ufds[i].fd == CURL_SOCKET_BAD)
continue;
if(FD_ISSET(ufds[i].fd, &fds_read))
ufds[i].revents |= POLLIN;
if(FD_ISSET(ufds[i].fd, &fds_write))
ufds[i].revents |= POLLOUT;
if(FD_ISSET(ufds[i].fd, &fds_err))
ufds[i].revents |= POLLPRI;
if(FD_ISSET(ufds[i].fd, &fds_read)) {
if(ufds[i].events & POLLRDNORM)
ufds[i].revents |= POLLRDNORM;
if(ufds[i].events & POLLIN)
ufds[i].revents |= POLLIN;
}
if(FD_ISSET(ufds[i].fd, &fds_write)) {
if(ufds[i].events & POLLWRNORM)
ufds[i].revents |= POLLWRNORM;
if(ufds[i].events & POLLOUT)
ufds[i].revents |= POLLOUT;
}
if(FD_ISSET(ufds[i].fd, &fds_err)) {
if(ufds[i].events & POLLRDBAND)
ufds[i].revents |= POLLRDBAND;
if(ufds[i].events & POLLPRI)
ufds[i].revents |= POLLPRI;
}
if(ufds[i].revents != 0)
r++;
}