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Import tmux, a terminal multiplexor allowing (among other things) a single

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terminal to be switched between several different windows and programs
displayed on one terminal be detached from one terminal and moved to another.

ok deraadt pirofti
This commit is contained in:
Nicholas Marriott
2009-06-01 22:58:49 +00:00
commit 35876eaab9
127 changed files with 28294 additions and 0 deletions
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97
buffer-poll.c Normal file
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/* $OpenBSD$ */
/*
* 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"
/* Set up pollfd for buffers. */
void
buffer_set(
struct pollfd *pfd, int fd, unused struct buffer *in, struct buffer *out)
{
pfd->fd = fd;
pfd->events = POLLIN;
if (BUFFER_USED(out) > 0)
pfd->events |= POLLOUT;
}
/* Fill buffers from socket based on poll results. */
int
buffer_poll(struct pollfd *pfd, struct buffer *in, struct buffer *out)
{
ssize_t n;
#if 0
log_debug("buffer_poll (%ld): fd=%d, revents=%d; out=%zu in=%zu",
(long) getpid(),
pfd->fd, pfd->revents, BUFFER_USED(out), BUFFER_USED(in));
#endif
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 0
log_debug("buffer_poll: fd=%d, read=%zd", pfd->fd, n);
#endif
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 0
log_debug("buffer_poll: fd=%d, write=%zd", pfd->fd, n);
#endif
if (n == -1) {
if (errno != EINTR && errno != EAGAIN)
return (-1);
} else
buffer_remove(out, n);
}
return (0);
}
/* Flush buffer output to socket. */
void
buffer_flush(int fd, struct buffer *in, struct buffer *out)
{
struct pollfd pfd;
while (BUFFER_USED(out) > 0) {
buffer_set(&pfd, fd, in, out);
if (poll(&pfd, 1, INFTIM) == -1) {
if (errno == EAGAIN || errno == EINTR)
continue;
fatal("poll failed");
}
if (buffer_poll(&pfd, in, out) != 0)
break;
}
}