mirror of
https://github.com/tmux/tmux.git
synced 2024-12-13 01:48:47 +00:00
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/* $Id: buffer-poll.c,v 1.16 2009-08-19 09:28:10 nicm Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
|
|
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
|
|
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
|
|
#include "tmux.h"
|
|
|
|
/* Fill buffers from socket based on poll results. */
|
|
int
|
|
buffer_poll(struct pollfd *pfd, struct buffer *in, struct buffer *out)
|
|
{
|
|
ssize_t n;
|
|
|
|
if (pfd->revents & (POLLERR|POLLNVAL|POLLHUP))
|
|
return (-1);
|
|
if (pfd->revents & POLLIN) {
|
|
buffer_ensure(in, BUFSIZ);
|
|
n = read(pfd->fd, BUFFER_IN(in), BUFFER_FREE(in));
|
|
if (n == 0)
|
|
return (-1);
|
|
if (n == -1) {
|
|
if (errno != EINTR && errno != EAGAIN)
|
|
return (-1);
|
|
} else
|
|
buffer_add(in, n);
|
|
}
|
|
if (BUFFER_USED(out) > 0 && pfd->revents & POLLOUT) {
|
|
n = write(pfd->fd, BUFFER_OUT(out), BUFFER_USED(out));
|
|
if (n == -1) {
|
|
if (errno != EINTR && errno != EAGAIN)
|
|
return (-1);
|
|
} else
|
|
buffer_remove(out, n);
|
|
}
|
|
return (0);
|
|
}
|