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Annotation of 43BSDReno/usr.bin/window/wwtty.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1983 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * This code is derived from software contributed to Berkeley by
                      6:  * Edward Wang at The University of California, Berkeley.
                      7:  *
                      8:  * Redistribution and use in source and binary forms are permitted provided
                      9:  * that: (1) source distributions retain this entire copyright notice and
                     10:  * comment, and (2) distributions including binaries display the following
                     11:  * acknowledgement:  ``This product includes software developed by the
                     12:  * University of California, Berkeley and its contributors'' in the
                     13:  * documentation or other materials provided with the distribution and in
                     14:  * all advertising materials mentioning features or use of this software.
                     15:  * Neither the name of the University nor the names of its contributors may
                     16:  * be used to endorse or promote products derived from this software without
                     17:  * specific prior written permission.
                     18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     19:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
                     20:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     21:  */
                     22: 
                     23: #ifndef lint
                     24: static char sccsid[] = "@(#)wwtty.c    3.16 (Berkeley) 6/6/90";
                     25: #endif /* not lint */
                     26: 
                     27: #include "ww.h"
                     28: #include <fcntl.h>
                     29: 
                     30: wwgettty(d, t)
                     31: register struct ww_tty *t;
                     32: {
                     33: #ifndef POSIX_TTY
                     34:        if (ioctl(d, TIOCGETP, (char *)&t->ww_sgttyb) < 0)
                     35:                goto bad;
                     36:        if (ioctl(d, TIOCGETC, (char *)&t->ww_tchars) < 0)
                     37:                goto bad;
                     38:        if (ioctl(d, TIOCGLTC, (char *)&t->ww_ltchars) < 0)
                     39:                goto bad;
                     40:        if (ioctl(d, TIOCLGET, (char *)&t->ww_lmode) < 0)
                     41:                goto bad;
                     42:        if (ioctl(d, TIOCGETD, (char *)&t->ww_ldisc) < 0)
                     43:                goto bad;
                     44: #else
                     45:        if (tcgetattr(d, &t->ww_termios) < 0)
                     46:                goto bad;
                     47: #endif
                     48:        if ((t->ww_fflags = fcntl(d, F_GETFL, 0)) < 0)
                     49:                goto bad;
                     50:        return 0;
                     51: bad:
                     52:        wwerrno = WWE_SYS;
                     53:        return -1;
                     54: }
                     55: 
                     56: /*
                     57:  * Set the modes of tty 'd' to 't'
                     58:  * 'o' is the current modes.  We set the line discipline only if
                     59:  * it changes, to avoid unnecessary flushing of typeahead.
                     60:  */
                     61: wwsettty(d, t, o)
                     62: register struct ww_tty *t, *o;
                     63: {
                     64: #ifndef POSIX_TTY
                     65:        /* for buggy tty driver that doesn't wait for output to drain */
                     66:        int i;
                     67:        while (ioctl(d, TIOCOUTQ, &i) >= 0 && i > 0)
                     68:                usleep(100000);
                     69:        if (ioctl(d, TIOCSETN, (char *)&t->ww_sgttyb) < 0)
                     70:                goto bad;
                     71:        if (ioctl(d, TIOCSETC, (char *)&t->ww_tchars) < 0)
                     72:                goto bad;
                     73:        if (ioctl(d, TIOCSLTC, (char *)&t->ww_ltchars) < 0)
                     74:                goto bad;
                     75:        if (ioctl(d, TIOCLSET, (char *)&t->ww_lmode) < 0)
                     76:                goto bad;
                     77:        if ((o == 0 || t->ww_ldisc != o->ww_ldisc) &&
                     78:            ioctl(d, TIOCSETD, (char *)&t->ww_ldisc) < 0)
                     79:                goto bad;
                     80: #else
                     81:        if (tcsetattr(d, TCSADRAIN, &t->ww_termios) < 0)
                     82:                goto bad;
                     83: #endif
                     84:        if (fcntl(d, F_SETFL, t->ww_fflags) < 0)
                     85:                goto bad;
                     86:        return 0;
                     87: bad:
                     88:        wwerrno = WWE_SYS;
                     89:        return -1;
                     90: }

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