1 files changed, 93 insertions, 0 deletions
diff --git a/newlib/libc/unix/ttyname_r.c b/newlib/libc/unix/ttyname_r.c
new file mode 100644
index 000000000..32bbd67af
--- /dev/null
+++ b/newlib/libc/unix/ttyname_r.c
@@ -0,0 +1,93 @@
+#ifndef _NO_TTYNAME
+/*
+ * 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.
+ * 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.
+ */
+
+#include "ttyname.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <unistd.h>
+#include <string.h>
+#include <paths.h>
+#include <_syslist.h>
+#include <errno.h>
+
+/*
+ *  ttyname_r() - POSIX 1003.1b 4.7.2 - Determine Terminal Device Name
+ */
+int
+_DEFUN( ttyname_r,(fd, name, namesize),
+	int fd _AND
+	char   *name _AND
+	size_t  namesize)
+{
+  struct stat sb;
+  struct dirent *dirp;
+  DIR *dp;
+  struct stat dsb;
+  char buf[TTYNAME_BUFSIZE];
+
+  /* Must be a terminal. */
+  if (!isatty(fd))
+    return ENOTTY;
+
+  /* Must be a character device. */
+  if (fstat (fd, &sb) || !S_ISCHR (sb.st_mode))
+    return ENOTTY;
+
+  if ((dp = opendir (_PATH_DEV)) == NULL)
+    return EBADF;
+
+  strcpy(buf, _PATH_DEV);
+  while ((dirp = readdir (dp)) != NULL)
+    {
+      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);
+      if(strlen(buf) < namesize)  /* < to account for terminating null */
+	{
+	strcpy(name, buf);
+	return 0;
+	}
+      else
+	{
+	return ERANGE;
+	}
+    }
+  (void) closedir (dp);
+  return EBADF;
+}
+
+#endif /* !_NO_TTYNAME  */