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Annotation of src/usr.bin/window/wwenviron.c, Revision 1.1

1.1     ! deraadt     1: /*     $NetBSD: wwenviron.c,v 1.3 1995/09/28 10:35:27 tls Exp $        */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 1983, 1993
        !             5:  *     The Regents of the University of California.  All rights reserved.
        !             6:  *
        !             7:  * This code is derived from software contributed to Berkeley by
        !             8:  * Edward Wang at The University of California, Berkeley.
        !             9:  *
        !            10:  * Redistribution and use in source and binary forms, with or without
        !            11:  * modification, are permitted provided that the following conditions
        !            12:  * are met:
        !            13:  * 1. Redistributions of source code must retain the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer.
        !            15:  * 2. Redistributions in binary form must reproduce the above copyright
        !            16:  *    notice, this list of conditions and the following disclaimer in the
        !            17:  *    documentation and/or other materials provided with the distribution.
        !            18:  * 3. All advertising materials mentioning features or use of this software
        !            19:  *    must display the following acknowledgement:
        !            20:  *     This product includes software developed by the University of
        !            21:  *     California, Berkeley and its contributors.
        !            22:  * 4. Neither the name of the University nor the names of its contributors
        !            23:  *    may be used to endorse or promote products derived from this software
        !            24:  *    without specific prior written permission.
        !            25:  *
        !            26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            36:  * SUCH DAMAGE.
        !            37:  */
        !            38:
        !            39: #ifndef lint
        !            40: #if 0
        !            41: static char sccsid[] = "@(#)wwenviron.c        8.1 (Berkeley) 6/6/93";
        !            42: #else
        !            43: static char rcsid[] = "$NetBSD: wwenviron.c,v 1.3 1995/09/28 10:35:27 tls Exp $";
        !            44: #endif
        !            45: #endif /* not lint */
        !            46:
        !            47: #include "ww.h"
        !            48: #if !defined(OLD_TTY) && !defined(TIOCSCTTY) && !defined(TIOCNOTTY)
        !            49: #include <sys/ioctl.h>
        !            50: #endif
        !            51: #include <sys/signal.h>
        !            52:
        !            53: /*
        !            54:  * Set up the environment of this process to run in window 'wp'.
        !            55:  */
        !            56: wwenviron(wp)
        !            57: register struct ww *wp;
        !            58: {
        !            59:        register i;
        !            60: #ifndef TIOCSCTTY
        !            61:        int pgrp = getpid();
        !            62: #endif
        !            63:        char buf[1024];
        !            64:
        !            65: #ifndef TIOCSCTTY
        !            66:        if ((i = open("/dev/tty", 0)) < 0)
        !            67:                goto bad;
        !            68:        if (ioctl(i, TIOCNOTTY, (char *)0) < 0)
        !            69:                goto bad;
        !            70:        (void) close(i);
        !            71: #endif
        !            72:        if ((i = wp->ww_socket) < 0) {
        !            73:                if ((i = open(wp->ww_ttyname, 2)) < 0)
        !            74:                        goto bad;
        !            75:                if (wwsettty(i, &wwwintty) < 0)
        !            76:                        goto bad;
        !            77:                if (wwsetttysize(i, wp->ww_w.nr, wp->ww_w.nc) < 0)
        !            78:                        goto bad;
        !            79:        }
        !            80:        (void) dup2(i, 0);
        !            81:        (void) dup2(i, 1);
        !            82:        (void) dup2(i, 2);
        !            83:        (void) close(i);
        !            84: #ifdef TIOCSCTTY
        !            85:        (void) setsid();
        !            86:        (void) ioctl(0, TIOCSCTTY, 0);
        !            87: #else
        !            88:        (void) ioctl(0, TIOCSPGRP, (char *)&pgrp);
        !            89:        (void) setpgrp(pgrp, pgrp);
        !            90: #endif
        !            91:        /* SIGPIPE is the only one we ignore */
        !            92:        (void) signal(SIGPIPE, SIG_DFL);
        !            93:        (void) sigsetmask(0);
        !            94:        /*
        !            95:         * Two conditions that make destructive setenv ok:
        !            96:         * 1. setenv() copies the string,
        !            97:         * 2. we've already called tgetent which copies the termcap entry.
        !            98:         */
        !            99:        (void) sprintf(buf, "%sco#%d:li#%d:%s",
        !           100:                WWT_TERMCAP, wp->ww_w.nc, wp->ww_w.nr, wwwintermcap);
        !           101:        (void) setenv("TERMCAP", buf, 1);
        !           102:        (void) sprintf(buf, "%d", wp->ww_id + 1);
        !           103:        (void) setenv("WINDOW_ID", buf, 1);
        !           104:        return 0;
        !           105: bad:
        !           106:        wwerrno = WWE_SYS;
        !           107:        return -1;
        !           108: }