1 /* $NetBSD: wwenviron.c,v 1.9 2003/08/07 11:17:39 agc Exp $ */ 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)wwenviron.c 8.1 (Berkeley) 6/6/93"; 39 #else 40 __RCSID("$NetBSD: wwenviron.c,v 1.9 2003/08/07 11:17:39 agc Exp $"); 41 #endif 42 #endif /* not lint */ 43 44 #include <sys/types.h> 45 #if !defined(OLD_TTY) && !defined(TIOCSCTTY) && !defined(TIOCNOTTY) 46 #include <sys/ioctl.h> 47 #endif 48 #include <fcntl.h> 49 #include <signal.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <unistd.h> 53 #include "ww.h" 54 55 /* 56 * Set up the environment of this process to run in window 'wp'. 57 */ 58 int 59 wwenviron(struct ww *wp) 60 { 61 int i; 62 #ifndef TIOCSCTTY 63 int pgrp = getpid(); 64 #endif 65 char buf[1024]; 66 sigset_t nsigset; 67 68 #ifndef TIOCSCTTY 69 if ((i = open("/dev/tty", 0)) < 0) 70 goto bad; 71 if (ioctl(i, TIOCNOTTY, (char *)0) < 0) 72 goto bad; 73 (void) close(i); 74 #endif 75 if ((i = wp->ww_socket) < 0) { 76 if ((i = open(wp->ww_ttyname, 2)) < 0) 77 goto bad; 78 if (wwsettty(i, &wwwintty) < 0) 79 goto bad; 80 if (wwsetttysize(i, wp->ww_w.nr, wp->ww_w.nc) < 0) 81 goto bad; 82 } 83 (void) dup2(i, 0); 84 (void) dup2(i, 1); 85 (void) dup2(i, 2); 86 (void) close(i); 87 #ifdef TIOCSCTTY 88 (void) setsid(); 89 (void) ioctl(0, TIOCSCTTY, 0); 90 #else 91 (void) ioctl(0, TIOCSPGRP, (char *)&pgrp); 92 (void) setpgid(pgrp, pgrp); 93 #endif 94 /* SIGPIPE is the only one we ignore */ 95 (void) signal(SIGPIPE, SIG_DFL); 96 sigemptyset(&nsigset); 97 sigprocmask(SIG_SETMASK, &nsigset, (sigset_t *)0); 98 /* 99 * Two conditions that make destructive setenv ok: 100 * 1. setenv() copies the string, 101 * 2. we've already called tgetent which copies the termcap entry. 102 */ 103 (void) sprintf(buf, "%sco#%d:li#%d:%s", 104 WWT_TERMCAP, wp->ww_w.nc, wp->ww_w.nr, wwwintermcap); 105 (void) setenv("TERMCAP", buf, 1); 106 (void) sprintf(buf, "%d", wp->ww_id + 1); 107 (void) setenv("WINDOW_ID", buf, 1); 108 return 0; 109 bad: 110 wwerrno = WWE_SYS; 111 return -1; 112 } 113