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Annotation of src/usr.bin/window/wwenviron.c, Revision 1.9

1.9     ! david       1: /*     $OpenBSD: wwenviron.c,v 1.8 2003/06/03 02:56:23 millert Exp $   */
1.2       deraadt     2: /*     $NetBSD: wwenviron.c,v 1.4 1995/12/21 08:39:50 mycroft Exp $    */
1.1       deraadt     3:
                      4: /*
                      5:  * Copyright (c) 1983, 1993
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * This code is derived from software contributed to Berkeley by
                      9:  * Edward Wang at The University of California, Berkeley.
                     10:  *
                     11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
1.8       millert    19:  * 3. Neither the name of the University nor the names of its contributors
1.1       deraadt    20:  *    may be used to endorse or promote products derived from this software
                     21:  *    without specific prior written permission.
                     22:  *
                     23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     33:  * SUCH DAMAGE.
                     34:  */
                     35:
                     36: #ifndef lint
                     37: #if 0
                     38: static char sccsid[] = "@(#)wwenviron.c        8.1 (Berkeley) 6/6/93";
                     39: #else
1.9     ! david      40: static char rcsid[] = "$OpenBSD: wwenviron.c,v 1.8 2003/06/03 02:56:23 millert Exp $";
1.1       deraadt    41: #endif
                     42: #endif /* not lint */
                     43:
                     44: #include "ww.h"
                     45: #if !defined(OLD_TTY) && !defined(TIOCSCTTY) && !defined(TIOCNOTTY)
                     46: #include <sys/ioctl.h>
                     47: #endif
                     48: #include <sys/signal.h>
1.9     ! david      49: #include <signal.h>
        !            50: #include <stdio.h>
1.1       deraadt    51:
                     52: /*
                     53:  * Set up the environment of this process to run in window 'wp'.
                     54:  */
                     55: wwenviron(wp)
1.6       mpech      56: struct ww *wp;
1.1       deraadt    57: {
1.6       mpech      58:        int i;
1.1       deraadt    59: #ifndef TIOCSCTTY
1.7       mpech      60:        pid_t pgrp = getpid();
1.1       deraadt    61: #endif
                     62:        char buf[1024];
1.2       deraadt    63:        sigset_t sigset;
1.1       deraadt    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);
1.2       deraadt    93:        sigemptyset(&sigset);
                     94:        sigprocmask(SIG_SETMASK, &sigset, (sigset_t *)0);
1.1       deraadt    95:        /*
                     96:         * Two conditions that make destructive setenv ok:
                     97:         * 1. setenv() copies the string,
                     98:         * 2. we've already called tgetent which copies the termcap entry.
                     99:         */
1.5       deraadt   100:        (void) snprintf(buf, sizeof buf, "%sco#%d:li#%d:%s",
1.1       deraadt   101:                WWT_TERMCAP, wp->ww_w.nc, wp->ww_w.nr, wwwintermcap);
                    102:        (void) setenv("TERMCAP", buf, 1);
1.5       deraadt   103:        (void) snprintf(buf, sizeof buf, "%d", wp->ww_id + 1);
1.1       deraadt   104:        (void) setenv("WINDOW_ID", buf, 1);
                    105:        return 0;
                    106: bad:
                    107:        wwerrno = WWE_SYS;
                    108:        return -1;
                    109: }