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Diffstat (limited to 'i/pc104/initrd/conf/busybox/coreutils/tty.c')
-rw-r--r--i/pc104/initrd/conf/busybox/coreutils/tty.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/coreutils/tty.c b/i/pc104/initrd/conf/busybox/coreutils/tty.c
new file mode 100644
index 0000000..c28aa33
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/coreutils/tty.c
@@ -0,0 +1,44 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * tty implementation for busybox
+ *
+ * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+/* BB_AUDIT SUSv3 compliant */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/tty.html */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "busybox.h"
+
+int tty_main(int argc, char **argv);
+int tty_main(int argc, char **argv)
+{
+ const char *s;
+ USE_INCLUDE_SUSv2(int silent;) /* Note: No longer relevant in SUSv3. */
+ int retval;
+
+ xfunc_error_retval = 2; /* SUSv3 requires > 1 for error. */
+
+ USE_INCLUDE_SUSv2(silent = getopt32(argc, argv, "s");)
+
+ /* gnu tty outputs a warning that it is ignoring all args. */
+ bb_warn_ignoring_args(argc - optind);
+
+ retval = 0;
+
+ if ((s = ttyname(0)) == NULL) {
+ /* According to SUSv3, ttyname can on fail with EBADF or ENOTTY.
+ * We know the file descriptor is good, so failure means not a tty. */
+ s = "not a tty";
+ retval = 1;
+ }
+ USE_INCLUDE_SUSv2(if (!silent) puts(s);)
+ SKIP_INCLUDE_SUSv2(puts(s);)
+
+ fflush_stdout_and_exit(retval);
+}