diff options
Diffstat (limited to 'usr.bin/window/wwiomux.c')
| -rw-r--r-- | usr.bin/window/wwiomux.c | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/usr.bin/window/wwiomux.c b/usr.bin/window/wwiomux.c deleted file mode 100644 index 7803557c16b6..000000000000 --- a/usr.bin/window/wwiomux.c +++ /dev/null @@ -1,205 +0,0 @@ -/* - * Copyright (c) 1983, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Edward Wang at The University of California, Berkeley. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#ifndef lint -static char sccsid[] = "@(#)wwiomux.c 8.1 (Berkeley) 6/6/93"; -static char rcsid[] = - "$FreeBSD$"; -#endif /* not lint */ - -#include "ww.h" -#include <sys/time.h> -#include <sys/types.h> -#if !defined(OLD_TTY) && !defined(TIOCPKT_DATA) -#include <sys/ioctl.h> -#endif -#include <fcntl.h> - -/* - * Multiple window output handler. - * The idea is to copy window outputs to the terminal, via the - * display package. We try to give wwcurwin highest priority. - * The only return conditions are when there is keyboard input - * and when a child process dies, which are serviced by signal - * catchers (wwrint() and wwchild()). - * When there's nothing to do, we sleep in a select(). - * This can be done better with interrupt driven io. But that's - * not supported on ptys, yet. - * The history of this routine is interesting. - */ -wwiomux() -{ - register struct ww *w; - fd_set imask; - register n; - register char *p; - char c; - struct timeval tv; - char noblock = 0; - - for (;;) { - if (wwinterrupt()) { - wwclrintr(); - return; - } - - FD_ZERO(&imask); - n = -1; - for (w = wwhead.ww_forw; w != &wwhead; w = w->ww_forw) { - if (w->ww_pty < 0) - continue; - if (w->ww_obq < w->ww_obe) { - if (w->ww_pty > n) - n = w->ww_pty; - FD_SET(w->ww_pty, &imask); - } - if (w->ww_obq > w->ww_obp && !w->ww_stopped) - noblock = 1; - } - - if (!noblock) { - if (wwcurwin != 0) - wwcurtowin(wwcurwin); - wwupdate(); - wwflush(); - (void) setjmp(wwjmpbuf); - wwsetjmp = 1; - if (wwinterrupt()) { - wwsetjmp = 0; - wwclrintr(); - return; - } - /* - * Defensive code. If somebody else (for example, - * wall) clears the ASYNC flag on us, we will block - * forever. So we need a finite timeout and set - * the flag again. Anything more clever will probably - * need even more system calls. (This is a bug - * in the kernel.) - * I don't like this one bit. - */ - (void) fcntl(0, F_SETFL, wwnewtty.ww_fflags); - tv.tv_sec = 30; - tv.tv_usec = 0; - } else { - tv.tv_sec = 0; - tv.tv_usec = 10000; - } - wwnselect++; - n = select(n + 1, &imask, (fd_set *)0, (fd_set *)0, &tv); - wwsetjmp = 0; - noblock = 0; - - if (n < 0) - wwnselecte++; - else if (n == 0) - wwnselectz++; - else - for (w = wwhead.ww_forw; w != &wwhead; w = w->ww_forw) { - if (w->ww_pty < 0 || - !FD_ISSET(w->ww_pty, &imask)) - continue; - wwnwread++; - p = w->ww_obq; - if (w->ww_ispty) { - if (p == w->ww_ob) { - w->ww_obp++; - w->ww_obq++; - } else - p--; - c = *p; - } - n = read(w->ww_pty, p, w->ww_obe - p); - if (n < 0) { - wwnwreade++; - (void) close(w->ww_pty); - w->ww_pty = -1; - } else if (n == 0) { - wwnwreadz++; - (void) close(w->ww_pty); - w->ww_pty = -1; - } else if (!w->ww_ispty) { - wwnwreadd++; - wwnwreadc += n; - w->ww_obq += n; - } else if (*p == TIOCPKT_DATA) { - n--; - wwnwreadd++; - wwnwreadc += n; - w->ww_obq += n; - } else { - wwnwreadp++; - if (*p & TIOCPKT_STOP) - w->ww_stopped = 1; - if (*p & TIOCPKT_START) - w->ww_stopped = 0; - if (*p & TIOCPKT_FLUSHWRITE) { - w->ww_stopped = 0; - w->ww_obq = w->ww_obp = - w->ww_ob; - } - } - if (w->ww_ispty) - *p = c; - } - /* - * Try the current window first, if there is output - * then process it and go back to the top to try again. - * This can lead to starvation of the other windows, - * but presumably that what we want. - * Update will eventually happen when output from wwcurwin - * dies down. - */ - if ((w = wwcurwin) != 0 && w->ww_pty >= 0 && - w->ww_obq > w->ww_obp && !w->ww_stopped) { - n = wwwrite(w, w->ww_obp, w->ww_obq - w->ww_obp); - if ((w->ww_obp += n) == w->ww_obq) - w->ww_obq = w->ww_obp = w->ww_ob; - noblock = 1; - continue; - } - for (w = wwhead.ww_forw; w != &wwhead; w = w->ww_forw) - if (w->ww_pty >= 0 && w->ww_obq > w->ww_obp && - !w->ww_stopped) { - n = wwwrite(w, w->ww_obp, - w->ww_obq - w->ww_obp); - if ((w->ww_obp += n) == w->ww_obq) - w->ww_obq = w->ww_obp = w->ww_ob; - if (wwinterrupt()) - break; - } - } -} |