diff options
Diffstat (limited to 'usr.bin/window/wwpty.c')
-rw-r--r-- | usr.bin/window/wwpty.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/usr.bin/window/wwpty.c b/usr.bin/window/wwpty.c new file mode 100644 index 0000000..1d82ff9 --- /dev/null +++ b/usr.bin/window/wwpty.c @@ -0,0 +1,87 @@ +/* + * 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[] = "@(#)wwpty.c 8.1 (Berkeley) 6/6/93"; +#endif /* not lint */ + +#include "ww.h" +#include <fcntl.h> +#if !defined(OLD_TTY) && !defined(TIOCPKT) +#include <sys/ioctl.h> +#endif + +wwgetpty(w) +register struct ww *w; +{ + register char c, *p; + int tty; + int on = 1; +#define PTY "/dev/XtyXX" +#define _PT 5 +#define _PQRS 8 +#define _0_9 9 + + (void) strcpy(w->ww_ttyname, PTY); + for (c = 'p'; c <= 'u'; c++) { + w->ww_ttyname[_PT] = 'p'; + w->ww_ttyname[_PQRS] = c; + w->ww_ttyname[_0_9] = '0'; + if (access(w->ww_ttyname, 0) < 0) + break; + for (p = "0123456789abcdef"; *p; p++) { + w->ww_ttyname[_PT] = 'p'; + w->ww_ttyname[_0_9] = *p; + if ((w->ww_pty = open(w->ww_ttyname, 2)) < 0) + continue; + w->ww_ttyname[_PT] = 't'; + if ((tty = open(w->ww_ttyname, 2)) < 0) { + (void) close(w->ww_pty); + continue; + } + (void) close(tty); + if (ioctl(w->ww_pty, TIOCPKT, (char *)&on) < 0) { + (void) close(w->ww_pty); + continue; + } + (void) fcntl(w->ww_pty, F_SETFD, 1); + return 0; + } + } + w->ww_pty = -1; + wwerrno = WWE_NOPTY; + return -1; +} |