1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. 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, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)wwenviron.c 8.1 (Berkeley) 6/6/93 37 * $FreeBSD: src/usr.bin/window/wwenviron.c,v 1.2.6.1 2001/05/17 09:45:01 obrien Exp $ 38 * $DragonFly: src/usr.bin/window/wwenviron.c,v 1.3 2006/01/12 13:43:11 corecode Exp $ 39 */ 40 41 #include "ww.h" 42 #if !defined(OLD_TTY) && !defined(TIOCSCTTY) && !defined(TIOCNOTTY) 43 #include <sys/ioctl.h> 44 #endif 45 #include <signal.h> 46 47 /* 48 * Set up the environment of this process to run in window 'wp'. 49 */ 50 wwenviron(wp) 51 register struct ww *wp; 52 { 53 register i; 54 #ifndef TIOCSCTTY 55 int pgrp = getpid(); 56 #endif 57 char buf[1024]; 58 59 #ifndef TIOCSCTTY 60 if ((i = open("/dev/tty", 0)) < 0) 61 goto bad; 62 if (ioctl(i, TIOCNOTTY, (char *)0) < 0) 63 goto bad; 64 (void) close(i); 65 #endif 66 if ((i = wp->ww_socket) < 0) { 67 if ((i = open(wp->ww_ttyname, 2)) < 0) 68 goto bad; 69 if (wwsettty(i, &wwwintty) < 0) 70 goto bad; 71 if (wwsetttysize(i, wp->ww_w.nr, wp->ww_w.nc) < 0) 72 goto bad; 73 } 74 (void) dup2(i, 0); 75 (void) dup2(i, 1); 76 (void) dup2(i, 2); 77 (void) close(i); 78 #ifdef TIOCSCTTY 79 (void) setsid(); 80 (void) ioctl(0, TIOCSCTTY, 0); 81 #else 82 (void) ioctl(0, TIOCSPGRP, (char *)&pgrp); 83 (void) setpgrp(pgrp, pgrp); 84 #endif 85 /* SIGPIPE is the only one we ignore */ 86 (void) signal(SIGPIPE, SIG_DFL); 87 (void) sigsetmask(0); 88 /* 89 * Two conditions that make destructive setenv ok: 90 * 1. setenv() copies the string, 91 * 2. we've already called tgetent which copies the termcap entry. 92 */ 93 (void) sprintf(buf, "%sco#%d:li#%d:%s", 94 WWT_TERMCAP, wp->ww_w.nc, wp->ww_w.nr, wwwintermcap); 95 if (setenv("TERMCAP", buf, 1) == -1) 96 err(1, "setenv: cannot set TERMCAP=%s", buf); 97 (void) sprintf(buf, "%d", wp->ww_id + 1); 98 if (setenv("WINDOW_ID", buf, 1) == -1) 99 err(1, "setenv: cannot set WINDOW_ID=%s", buf); 100 return 0; 101 bad: 102 wwerrno = WWE_SYS; 103 return -1; 104 } 105