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Annotation of 43BSDTahoe/ucb/window/wwpty.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  */
        !            17: 
        !            18: #ifndef lint
        !            19: static char sccsid[] = "@(#)wwpty.c    3.15 (Berkeley) 6/29/88";
        !            20: #endif /* not lint */
        !            21: 
        !            22: #include "ww.h"
        !            23: 
        !            24: wwgetpty(w)
        !            25: register struct ww *w;
        !            26: {
        !            27:        register char c, *p;
        !            28:        int tty;
        !            29:        int on = 1;
        !            30: #define PTY "/dev/XtyXX"
        !            31: #define _PT    5
        !            32: #define _PQRS  8
        !            33: #define _0_9   9
        !            34: 
        !            35:        (void) strcpy(w->ww_ttyname, PTY);
        !            36:        for (c = 'p'; c <= 'u'; c++) {
        !            37:                w->ww_ttyname[_PT] = 'p';
        !            38:                w->ww_ttyname[_PQRS] = c;
        !            39:                w->ww_ttyname[_0_9] = '0';
        !            40:                if (access(w->ww_ttyname, 0) < 0)
        !            41:                        break;
        !            42:                for (p = "0123456789abcdef"; *p; p++) {
        !            43:                        w->ww_ttyname[_PT] = 'p';
        !            44:                        w->ww_ttyname[_0_9] = *p;
        !            45:                        if ((w->ww_pty = open(w->ww_ttyname, 2)) < 0)
        !            46:                                continue;
        !            47:                        w->ww_ttyname[_PT] = 't';
        !            48:                        if ((tty = open(w->ww_ttyname, 2)) < 0) {
        !            49:                                (void) close(w->ww_pty);
        !            50:                                continue;
        !            51:                        }
        !            52:                        (void) close(tty);
        !            53:                        if (ioctl(w->ww_pty, TIOCPKT, (char *)&on) < 0) {
        !            54:                                (void) close(w->ww_pty);
        !            55:                                continue;
        !            56:                        }
        !            57:                        return 0;
        !            58:                }
        !            59:        }
        !            60:        w->ww_pty = -1;
        !            61:        wwerrno = WWE_NOPTY;
        !            62:        return -1;
        !            63: }

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