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-rw-r--r--init/Makefile.in1
-rw-r--r--init/config.in1
-rw-r--r--init/mesg.c58
3 files changed, 60 insertions, 0 deletions
diff --git a/init/Makefile.in b/init/Makefile.in
index 8cc95264d..cd3ead839 100644
--- a/init/Makefile.in
+++ b/init/Makefile.in
@@ -25,6 +25,7 @@ endif
INIT-y:=
INIT-$(CONFIG_HALT) += halt.o
INIT-$(CONFIG_INIT) += init.o
+INIT-$(CONFIG_MESG) += mesg.o
INIT-$(CONFIG_POWEROFF) += poweroff.o
INIT-$(CONFIG_REBOOT) += reboot.o
INIT-$(CONFIG_START_STOP_DAEMON) += start_stop_daemon.o
diff --git a/init/config.in b/init/config.in
index 58fe1d8e3..e4aa4fbba 100644
--- a/init/config.in
+++ b/init/config.in
@@ -22,6 +22,7 @@ fi
bool 'start-stop-daemon' CONFIG_START_STOP_DAEMON
bool 'run-parts' CONFIG_RUN_PARTS
+bool 'mesg' CONFIG_MESG
endmenu
diff --git a/init/mesg.c b/init/mesg.c
new file mode 100644
index 000000000..f9b46e029
--- /dev/null
+++ b/init/mesg.c
@@ -0,0 +1,58 @@
+/*
+ * mesg implementation for busybox
+ *
+ * Copyright (c) 2002 Manuel Novoa III <mjn3@codepoet.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include "libbb.h"
+
+#ifdef USE_TTY_GROUP
+#define S_IWGRP_OR_S_IWOTH S_IWGRP
+#else
+#define S_IWGRP_OR_S_IWOTH (S_IWGRP | S_IWOTH)
+#endif
+
+extern int mesg_main(int argc, char *argv[])
+{
+ struct stat sb;
+ char *tty;
+ char c;
+
+ if ((--argc == 0)
+ || ((argc == 1) && (((c = **++argv) == 'y') || (c == 'n')))) {
+ if ((tty = ttyname(STDERR_FILENO)) == NULL) {
+ tty = "ttyname";
+ } else if (stat(tty, &sb) == 0) {
+ if (argc == 0) {
+ puts(((sb.st_mode & (S_IWGRP | S_IWOTH)) ==
+ 0) ? "is n" : "is y");
+ return EXIT_SUCCESS;
+ }
+ if (chmod
+ (tty,
+ (c ==
+ 'y') ? sb.st_mode | (S_IWGRP_OR_S_IWOTH) : sb.
+ st_mode & ~(S_IWGRP | S_IWOTH)) == 0) {
+ return EXIT_SUCCESS;
+ }
+ }
+ perror_msg_and_die("%s", tty);
+ }
+ show_usage();
+}