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Annotation of 43BSDTahoe/ucb/window/wwenviron.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:  * 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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