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authorErik Andersen2000-01-15 22:28:50 +0000
committerErik Andersen2000-01-15 22:28:50 +0000
commit3163821967821518cfa4c4315f775ec5301bb023 (patch)
treefe0c764cb41cc3ea86c3dcd270e48fa6a1abebcd /coreutils/tty.c
parentb7cc49d992ed9a5a59261096012e0b4a811bb7f4 (diff)
downloadbusybox-3163821967821518cfa4c4315f775ec5301bb023.zip
busybox-3163821967821518cfa4c4315f775ec5301bb023.tar.gz
Sync up busybox with the latest and greatest. This is not stuff for
the Embedix release. -Erik
Diffstat (limited to 'coreutils/tty.c')
-rw-r--r--coreutils/tty.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/coreutils/tty.c b/coreutils/tty.c
new file mode 100644
index 0000000..83abaff
--- /dev/null
+++ b/coreutils/tty.c
@@ -0,0 +1,42 @@
+/*
+ * Mini tty implementation for busybox
+ *
+ * Copyright (C) 2000 Edward Betts <edward@debian.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 "internal.h"
+#include <stdio.h>
+#include <sys/types.h>
+
+static const char tty_usage[] = "tty\n\n"
+"Print the file name of the terminal connected to standard input.\n"
+"\t-s\tprint nothing, only return an exit status\n";
+
+extern int tty_main(int argc, char **argv) {
+ char *tty;
+
+ if (argc > 1) {
+ if (argv[1][0] != '-' || argv[1][1] != 's') usage (tty_usage);
+ }
+ else {
+ tty = ttyname (0);
+ if (tty) puts (tty);
+ else puts ("not a tty");
+ }
+ exit (isatty (0) ? TRUE : FALSE);
+}