1 /* @(#)wwenviron.c 8.1 (Berkeley) 6/6/93 */ 2 /* $NetBSD: wwenviron.c,v 1.9 2003/08/07 11:17:39 agc Exp $ */ 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. 19 * 3. Neither the name of the University nor the names of its contributors 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 #include <sys/types.h> 37 #if !defined(OLD_TTY) && !defined(TIOCSCTTY) && !defined(TIOCNOTTY) 38 #include <sys/ioctl.h> 39 #endif 40 #include <fcntl.h> 41 #include <signal.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <unistd.h> 45 #include "ww.h" 46 47 /* 48 * Set up the environment of this process to run in window 'wp'. 49 */ 50 int 51 wwenviron(struct ww *wp) 52 { 53 int i; 54 #ifndef TIOCSCTTY 55 int pgrp = getpid(); 56 #endif 57 char buf[1024]; 58 sigset_t nsigset; 59 60 #ifndef TIOCSCTTY 61 if ((i = open("/dev/tty", 0)) < 0) 62 goto bad; 63 if (ioctl(i, TIOCNOTTY, (char *)0) < 0) 64 goto bad; 65 (void) close(i); 66 #endif 67 if ((i = wp->ww_socket) < 0) { 68 if ((i = open(wp->ww_ttyname, 2)) < 0) 69 goto bad; 70 if (wwsettty(i, &wwwintty) < 0) 71 goto bad; 72 if (wwsetttysize(i, wp->ww_w.nr, wp->ww_w.nc) < 0) 73 goto bad; 74 } 75 (void) dup2(i, 0); 76 (void) dup2(i, 1); 77 (void) dup2(i, 2); 78 (void) close(i); 79 #ifdef TIOCSCTTY 80 (void) setsid(); 81 (void) ioctl(0, TIOCSCTTY, 0); 82 #else 83 (void) ioctl(0, TIOCSPGRP, (char *)&pgrp); 84 (void) setpgid(pgrp, pgrp); 85 #endif 86 /* SIGPIPE is the only one we ignore */ 87 (void) signal(SIGPIPE, SIG_DFL); 88 sigemptyset(&nsigset); 89 sigprocmask(SIG_SETMASK, &nsigset, (sigset_t *)0); 90 /* 91 * Two conditions that make destructive setenv ok: 92 * 1. setenv() copies the string, 93 * 2. we've already called tgetent which copies the termcap entry. 94 */ 95 (void) sprintf(buf, "%sco#%d:li#%d:%s", 96 WWT_TERMCAP, wp->ww_w.nc, wp->ww_w.nr, wwwintermcap); 97 (void) setenv("TERMCAP", buf, 1); 98 (void) sprintf(buf, "%d", wp->ww_id + 1); 99 (void) setenv("WINDOW_ID", buf, 1); 100 return 0; 101 bad: 102 wwerrno = WWE_SYS; 103 return -1; 104 } 105