1 files changed, 46 insertions, 0 deletions
diff --git a/libc/string/strerror.c b/libc/string/strerror.c
new file mode 100644
index 000000000..6eeac104e
--- /dev/null
+++ b/libc/string/strerror.c
@@ -0,0 +1,46 @@
+/* Copyright (C) 1991, 1993, 1994 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+extern char *itoa(int);
+
+/* Return a string descibing the errno code in ERRNUM.
+   The storage is good only until the next call to strerror.
+   Writing to the storage causes undefined behavior.  */
+char *strerror(int err)
+{
+	static char retbuf[80];
+
+	if (sys_nerr) {
+		if (err < 0 || err >= sys_nerr)
+			goto unknown;
+		return sys_errlist[err];
+	}
+
+	if (err <= 0)
+		goto unknown;
+
+  unknown:
+	printf("sys_nerr=%d\n", sys_nerr);
+	strcpy(retbuf, "Unknown Error: errno=");
+	strcat(retbuf, (char *) itoa(err));
+	return retbuf;
+}