1 files changed, 85 insertions, 0 deletions
diff --git a/newlib/libc/unix/ttyname.c b/newlib/libc/unix/ttyname.c
new file mode 100644
index 00000000000..582a7903fe0
--- /dev/null
+++ b/newlib/libc/unix/ttyname.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 1988 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)ttyname.c	5.10 (Berkeley) 5/6/91";
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <termios.h>
+#include <unistd.h>
+#include <paths.h>
+#include <_syslist.h>
+
+static char buf[sizeof (_PATH_DEV) + MAXNAMLEN] = _PATH_DEV;
+
+char *
+ttyname (fd)
+     int fd;
+{
+  struct stat sb;
+  struct termios tty;
+  struct dirent *dirp;
+  DIR *dp;
+  struct stat dsb;
+  char *rval;
+
+  /* Must be a terminal. */
+  if (tcgetattr (fd, &tty) < 0)
+    return NULL;
+
+  /* Must be a character device. */
+  if (_fstat (fd, &sb) || !S_ISCHR (sb.st_mode))
+    return NULL;
+
+  if ((dp = _opendir (_PATH_DEV)) == NULL)
+    return NULL;
+
+  for (rval = NULL; dirp = _readdir (dp);)
+    {
+      if (dirp->d_ino != sb.st_ino)
+	continue;
+      strcpy (buf + sizeof (_PATH_DEV) - 1, dirp->d_name);
+      if (stat (buf, &dsb) || sb.st_dev != dsb.st_dev ||
+	  sb.st_ino != dsb.st_ino)
+	continue;
+      (void) _closedir (dp);
+      rval = buf;
+      break;
+    }
+  (void) _closedir (dp);
+  return rval;
+}