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Annotation of 43BSDReno/usr.bin/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:  * 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[] = "@(#)wwenviron.c        3.26 (Berkeley) 6/6/90";
                     25: #endif /* not lint */
                     26: 
                     27: #include "ww.h"
                     28: #ifdef POSIX_TTY
                     29: #include <sys/ioctl.h>
                     30: #endif
                     31: #include <sys/signal.h>
                     32: 
                     33: /*
                     34:  * Set up the environment of this process to run in window 'wp'.
                     35:  */
                     36: wwenviron(wp)
                     37: register struct ww *wp;
                     38: {
                     39:        register i;
                     40: #ifndef TIOCSCTTY
                     41:        int pgrp = getpid();
                     42: #endif
                     43:        char buf[1024];
                     44: 
                     45: #ifndef TIOCSCTTY
                     46:        if ((i = open("/dev/tty", 0)) < 0)
                     47:                goto bad;
                     48:        if (ioctl(i, TIOCNOTTY, (char *)0) < 0)
                     49:                goto bad;
                     50:        (void) close(i);
                     51: #endif
                     52:        if ((i = wp->ww_socket) < 0) {
                     53:                struct winsize winsize;
                     54: 
                     55:                if ((i = open(wp->ww_ttyname, 2)) < 0)
                     56:                        goto bad;
                     57:                if (wwsettty(i, &wwwintty, (struct ww_tty *)0) < 0)
                     58:                        goto bad;
                     59:                winsize.ws_row = wp->ww_w.nr;
                     60:                winsize.ws_col = wp->ww_w.nc;
                     61:                winsize.ws_xpixel = winsize.ws_ypixel = 0;
                     62:                if (ioctl(i, TIOCSWINSZ, (char *)&winsize) < 0)
                     63:                        goto bad;
                     64:        }
                     65:        (void) dup2(i, 0);
                     66:        (void) dup2(i, 1);
                     67:        (void) dup2(i, 2);
                     68:        for (i = wwdtablesize - 1; i > 2; i--)
                     69:                (void) close(i);
                     70: #ifdef TIOCSCTTY
                     71:        (void) setsid(0);
                     72:        (void) ioctl(0, TIOCSCTTY, 0);
                     73: #else
                     74:        (void) ioctl(0, TIOCSPGRP, (char *)&pgrp);
                     75:        (void) setpgrp(pgrp, pgrp);
                     76: #endif
                     77:        /* SIGPIPE is the only one we ignore */
                     78:        (void) signal(SIGPIPE, SIG_DFL);
                     79:        (void) sigsetmask(0);
                     80:        /*
                     81:         * Two conditions that make destructive setenv ok:
                     82:         * 1. setenv() copies the string,
                     83:         * 2. we've already called tgetent which copies the termcap entry.
                     84:         */
                     85:        (void) sprintf(buf, "%sco#%d:li#%d:%s",
                     86:                WWT_TERMCAP, wp->ww_w.nc, wp->ww_w.nr, wwwintermcap);
                     87:        (void) setenv("TERMCAP", buf, 1);
                     88:        (void) sprintf(buf, "%d", wp->ww_id + 1);
                     89:        (void) setenv("WINDOW_ID", buf, 1);
                     90:        return 0;
                     91: bad:
                     92:        wwerrno = WWE_SYS;
                     93:        return -1;
                     94: }

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