| 1 | /* |
| 2 | * Copyright (c) 1983 Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms are permitted |
| 6 | * provided that the above copyright notice and this paragraph are |
| 7 | * duplicated in all such forms and that any documentation, |
| 8 | * advertising materials, and other materials related to such |
| 9 | * distribution and use acknowledge that the software was developed |
| 10 | * by the University of California, Berkeley. The name of the |
| 11 | * University may not be used to endorse or promote products derived |
| 12 | * from this software without specific prior written permission. |
| 13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| 14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| 15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 16 | */ |
| 17 | |
| 18 | #ifndef lint |
| 19 | static char sccsid[] = "@(#)wwenviron.c 3.20 (Berkeley) %G%"; |
| 20 | #endif /* not lint */ |
| 21 | |
| 22 | #include "ww.h" |
| 23 | #include <sys/signal.h> |
| 24 | |
| 25 | /* |
| 26 | * Set up the environment of this process to run in window 'wp'. |
| 27 | */ |
| 28 | wwenviron(wp) |
| 29 | register struct ww *wp; |
| 30 | { |
| 31 | register i; |
| 32 | int pgrp = getpid(); |
| 33 | char buf[1024]; |
| 34 | |
| 35 | if ((i = open("/dev/tty", 0)) < 0) |
| 36 | goto bad; |
| 37 | if (ioctl(i, TIOCNOTTY, (char *)0) < 0) |
| 38 | goto bad; |
| 39 | (void) close(i); |
| 40 | if ((i = wp->ww_socket) < 0 && (i = open(wp->ww_ttyname, 2)) < 0) |
| 41 | goto bad; |
| 42 | (void) dup2(i, 0); |
| 43 | (void) dup2(i, 1); |
| 44 | (void) dup2(i, 2); |
| 45 | for (i = wwdtablesize - 1; i > 2; i--) |
| 46 | (void) close(i); |
| 47 | (void) ioctl(0, TIOCSPGRP, (char *)&pgrp); |
| 48 | (void) setpgrp(pgrp, pgrp); |
| 49 | /* SIGPIPE is the only one we ignore */ |
| 50 | (void) signal(SIGPIPE, SIG_DFL); |
| 51 | (void) sigsetmask(0); |
| 52 | /* |
| 53 | * Two conditions that make destructive setenv ok: |
| 54 | * 1. setenv() copies the string, |
| 55 | * 2. we've already called tgetent which copies the termcap entry. |
| 56 | */ |
| 57 | (void) sprintf(buf, "%sco#%d:li#%d:%s", |
| 58 | WWT_TERMCAP, wp->ww_w.nc, wp->ww_w.nr, wwwintermcap); |
| 59 | (void) setenv("TERMCAP", buf, 1); |
| 60 | (void) sprintf(buf, "%d", wp->ww_id + 1); |
| 61 | (void) setenv("WINDOW_ID", buf, 1); |
| 62 | return 0; |
| 63 | bad: |
| 64 | wwerrno = WWE_SYS; |
| 65 | return -1; |
| 66 | } |