1 /* 2 * Copyright (c) 1983 Regents of the University of California. 3 * 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 * %sccs.include.redist.c% 9 */ 10 11 #ifndef lint 12 static char sccsid[] = "@(#)wwenviron.c 3.27 (Berkeley) 08/12/90"; 13 #endif /* not lint */ 14 15 #include "ww.h" 16 #if !defined(OLD_TTY) && !defined(TIOCSCTTY) && !defined(TIOCNOTTY) 17 #include <sys/ioctl.h> 18 #endif 19 #include <sys/signal.h> 20 21 /* 22 * Set up the environment of this process to run in window 'wp'. 23 */ 24 wwenviron(wp) 25 register struct ww *wp; 26 { 27 register i; 28 #ifndef TIOCSCTTY 29 int pgrp = getpid(); 30 #endif 31 char buf[1024]; 32 33 #ifndef TIOCSCTTY 34 if ((i = open("/dev/tty", 0)) < 0) 35 goto bad; 36 if (ioctl(i, TIOCNOTTY, (char *)0) < 0) 37 goto bad; 38 (void) close(i); 39 #endif 40 if ((i = wp->ww_socket) < 0) { 41 if ((i = open(wp->ww_ttyname, 2)) < 0) 42 goto bad; 43 if (wwsettty(i, &wwwintty) < 0) 44 goto bad; 45 if (wwsetttysize(i, wp->ww_w.nr, wp->ww_w.nc) < 0) 46 goto bad; 47 } 48 (void) dup2(i, 0); 49 (void) dup2(i, 1); 50 (void) dup2(i, 2); 51 for (i = wwdtablesize - 1; i > 2; i--) 52 (void) close(i); 53 #ifdef TIOCSCTTY 54 (void) setsid(); 55 (void) ioctl(0, TIOCSCTTY, 0); 56 #else 57 (void) ioctl(0, TIOCSPGRP, (char *)&pgrp); 58 (void) setpgrp(pgrp, pgrp); 59 #endif 60 /* SIGPIPE is the only one we ignore */ 61 (void) signal(SIGPIPE, SIG_DFL); 62 (void) sigsetmask(0); 63 /* 64 * Two conditions that make destructive setenv ok: 65 * 1. setenv() copies the string, 66 * 2. we've already called tgetent which copies the termcap entry. 67 */ 68 (void) sprintf(buf, "%sco#%d:li#%d:%s", 69 WWT_TERMCAP, wp->ww_w.nc, wp->ww_w.nr, wwwintermcap); 70 (void) setenv("TERMCAP", buf, 1); 71 (void) sprintf(buf, "%d", wp->ww_id + 1); 72 (void) setenv("WINDOW_ID", buf, 1); 73 return 0; 74 bad: 75 wwerrno = WWE_SYS; 76 return -1; 77 } 78