mesg applet by Manuel Novoa III

git-svn-id: svn://busybox.net/trunk/busybox@5491 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 58 insertions, 0 deletions

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();
+}