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Annotation of src/usr.bin/window/wwenviron.c, Revision 1.2

1.2     ! deraadt     1: /*     $NetBSD: wwenviron.c,v 1.4 1995/12/21 08:39:50 mycroft Exp $    */
1.1       deraadt     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
1.2     ! deraadt    43: static char rcsid[] = "$NetBSD: wwenviron.c,v 1.4 1995/12/21 08:39:50 mycroft Exp $";
1.1       deraadt    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];
1.2     ! deraadt    64:        sigset_t sigset;
1.1       deraadt    65:
                     66: #ifndef TIOCSCTTY
                     67:        if ((i = open("/dev/tty", 0)) < 0)
                     68:                goto bad;
                     69:        if (ioctl(i, TIOCNOTTY, (char *)0) < 0)
                     70:                goto bad;
                     71:        (void) close(i);
                     72: #endif
                     73:        if ((i = wp->ww_socket) < 0) {
                     74:                if ((i = open(wp->ww_ttyname, 2)) < 0)
                     75:                        goto bad;
                     76:                if (wwsettty(i, &wwwintty) < 0)
                     77:                        goto bad;
                     78:                if (wwsetttysize(i, wp->ww_w.nr, wp->ww_w.nc) < 0)
                     79:                        goto bad;
                     80:        }
                     81:        (void) dup2(i, 0);
                     82:        (void) dup2(i, 1);
                     83:        (void) dup2(i, 2);
                     84:        (void) close(i);
                     85: #ifdef TIOCSCTTY
                     86:        (void) setsid();
                     87:        (void) ioctl(0, TIOCSCTTY, 0);
                     88: #else
                     89:        (void) ioctl(0, TIOCSPGRP, (char *)&pgrp);
                     90:        (void) setpgrp(pgrp, pgrp);
                     91: #endif
                     92:        /* SIGPIPE is the only one we ignore */
                     93:        (void) signal(SIGPIPE, SIG_DFL);
1.2     ! deraadt    94:        sigemptyset(&sigset);
        !            95:        sigprocmask(SIG_SETMASK, &sigset, (sigset_t *)0);
1.1       deraadt    96:        /*
                     97:         * Two conditions that make destructive setenv ok:
                     98:         * 1. setenv() copies the string,
                     99:         * 2. we've already called tgetent which copies the termcap entry.
                    100:         */
                    101:        (void) sprintf(buf, "%sco#%d:li#%d:%s",
                    102:                WWT_TERMCAP, wp->ww_w.nc, wp->ww_w.nr, wwwintermcap);
                    103:        (void) setenv("TERMCAP", buf, 1);
                    104:        (void) sprintf(buf, "%d", wp->ww_id + 1);
                    105:        (void) setenv("WINDOW_ID", buf, 1);
                    106:        return 0;
                    107: bad:
                    108:        wwerrno = WWE_SYS;
                    109:        return -1;
                    110: }