Initial Contribution
diff --git a/libc/stdio/tempnam.c b/libc/stdio/tempnam.c
new file mode 100644
index 0000000..3b7ec75
--- /dev/null
+++ b/libc/stdio/tempnam.c
@@ -0,0 +1,84 @@
+/* $OpenBSD: tempnam.c,v 1.14 2005/08/08 08:05:36 espie Exp $ */
+/*
+ * Copyright (c) 1988, 1993
+ * 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. 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 <sys/param.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <paths.h>
+
+__warn_references(tempnam,
+ "warning: tempnam() possibly used unsafely; consider using mkstemp()");
+
+extern char *_mktemp(char *);
+
+char *
+tempnam(const char *dir, const char *pfx)
+{
+ int sverrno;
+ char *f, *name;
+
+ if (!(name = malloc(MAXPATHLEN)))
+ return(NULL);
+
+ if (!pfx)
+ pfx = "tmp.";
+
+ if (issetugid() == 0 && (f = getenv("TMPDIR"))) {
+ (void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXXXXXX", f,
+ *(f + strlen(f) - 1) == '/'? "": "/", pfx);
+ if ((f = _mktemp(name)))
+ return(f);
+ }
+
+ if ((f = (char *)dir)) {
+ (void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXXXXXX", f,
+ *(f + strlen(f) - 1) == '/'? "": "/", pfx);
+ if ((f = _mktemp(name)))
+ return(f);
+ }
+
+ f = P_tmpdir;
+ (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXXXXX", f, pfx);
+ if ((f = _mktemp(name)))
+ return(f);
+
+ f = _PATH_TMP;
+ (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXXXXX", f, pfx);
+ if ((f = _mktemp(name)))
+ return(f);
+
+ sverrno = errno;
+ free(name);
+ errno = sverrno;
+ return(NULL);
+}