Importing usr.bin/mesg

Replaces commands/mesg. No Minix-specific changes needed.

Change-Id: Ief22ad7f050f8083d0b43a4ea90b348c504d99a2

commands/Makefile

@@ -15,7 +15,7 @@ SUBDIR=	add_route arp ash at backup btrace \
 	intr ipcrm ipcs irdpd isoread last \
 	less loadkeys loadramdisk logger look lp \
 	lpd lspci mail MAKEDEV \
-	mesg mined mkfifo \
+	mined mkfifo \
 	mount mt netconf \
 	nonamed od paste patch \
 	ping postinstall poweroff prep printroot \

commands/mesg/Makefile

@@ -1,4 +0,0 @@
-PROG=	mesg
-MAN=
-
-.include <bsd.prog.mk>

commands/mesg/mesg.c

@@ -1,48 +0,0 @@
-/* mesg - enable or disable communications. Author: John J. Ribera */
-
-/*
- * mesg -	enable or disable communications.
- *
- * Usage:	mesg [ y | n ]
- *
- *		'mesg n' will turn off group and world permissions of the
- *			 user's terminal.
- *		'mesg y' will enable group and world to write to the user's
- *			 tty.
- *		mesg	 with no parameters will put the writeable status
- *			 onto stdout.
- *
- * Author:	John J. Ribera, Jr. 09/09/90
- */
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-int main(int argc, char *argv []);
-
-int main(argc, argv)
-int  argc;
-char *argv[];
-{
-  struct stat statb;
-  char *tty_name;
-
-  if ((tty_name = ttyname(0)) == NULL) exit(2);
-  if (stat(tty_name, &statb) == -1) exit(2);
-  if (--argc) {
-	if (*argv[1] == 'n') statb.st_mode = 0600;
-	  else if (*argv[1] == 'y') statb.st_mode = 0620;
-	  else {
-		fprintf(stderr, "mesg: usage: mesg [n|y]\n");
-		exit(2);
-	}
-	if (chmod(tty_name, statb.st_mode) == -1) exit(2);
-  } else printf((statb.st_mode & 020) ? "is y\n" : "is n\n");
-
-  if (statb.st_mode & 020) exit(0);
-
-  exit(1);
-}
-