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Annotation of 43BSDTahoe/ucb/window/wwenviron.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[] = "@(#)wwenviron.c        3.20 (Berkeley) 6/29/88";
        !            20: #endif /* not lint */
        !            21: 
        !            22: #include "ww.h"
        !            23: #include <sys/signal.h>
        !            24: 
        !            25: /*
        !            26:  * Set up the environment of this process to run in window 'wp'.
        !            27:  */
        !            28: wwenviron(wp)
        !            29: register struct ww *wp;
        !            30: {
        !            31:        register i;
        !            32:        int pgrp = getpid();
        !            33:        char buf[1024];
        !            34: 
        !            35:        if ((i = open("/dev/tty", 0)) < 0)
        !            36:                goto bad;
        !            37:        if (ioctl(i, TIOCNOTTY, (char *)0) < 0)
        !            38:                goto bad;
        !            39:        (void) close(i);
        !            40:        if ((i = wp->ww_socket) < 0 && (i = open(wp->ww_ttyname, 2)) < 0)
        !            41:                goto bad;
        !            42:        (void) dup2(i, 0);
        !            43:        (void) dup2(i, 1);
        !            44:        (void) dup2(i, 2);
        !            45:        for (i = wwdtablesize - 1; i > 2; i--)
        !            46:                (void) close(i);
        !            47:        (void) ioctl(0, TIOCSPGRP, (char *)&pgrp);
        !            48:        (void) setpgrp(pgrp, pgrp);
        !            49:        /* SIGPIPE is the only one we ignore */
        !            50:        (void) signal(SIGPIPE, SIG_DFL);
        !            51:        (void) sigsetmask(0);
        !            52:        /*
        !            53:         * Two conditions that make destructive setenv ok:
        !            54:         * 1. setenv() copies the string,
        !            55:         * 2. we've already called tgetent which copies the termcap entry.
        !            56:         */
        !            57:        (void) sprintf(buf, "%sco#%d:li#%d:%s",
        !            58:                WWT_TERMCAP, wp->ww_w.nc, wp->ww_w.nr, wwwintermcap);
        !            59:        (void) setenv("TERMCAP", buf, 1);
        !            60:        (void) sprintf(buf, "%d", wp->ww_id + 1);
        !            61:        (void) setenv("WINDOW_ID", buf, 1);
        !            62:        return 0;
        !            63: bad:
        !            64:        wwerrno = WWE_SYS;
        !            65:        return -1;
        !            66: }

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