* Copyright (c) 1987 Regents of the University of California.
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
"@(#) Copyright (c) 1987 Regents of the University of California.\n\
static char sccsid
[] = "@(#)mesg.c 4.5 (Berkeley) %G%";
* mesg -- set current tty to accept or
* forbid write permission.
if (!(tty
= ttyname(2))) {
fputs("mesg: not a device in /dev.\n", stderr
);
if (stat(tty
, &sbuf
) < 0) {
if (sbuf
.st_mode
& 020) {
newmode(sbuf
.st_mode
| OTHER_WRITE
);
newmode(sbuf
.st_mode
&~ OTHER_WRITE
);
fputs("usage: mesg [y] [n]\n", stderr
);