1 files changed, 61 insertions, 0 deletions
diff --git a/compat_mkdtemp.c b/compat_mkdtemp.c
new file mode 100644
index 00000000..d12fa87a
--- /dev/null
+++ b/compat_mkdtemp.c
@@ -0,0 +1,61 @@
+#include "config.h"
+
+#if HAVE_MKDTEMP
+
+int dummy;
+
+#else
+
+/*	$Id$	*/
+/*
+ * Copyright (c) 2015 Ingo Schwarze <schwarze@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * The algorithm of this function is inspired by OpenBSD mkdtemp(3)
+ * by Theo de Raadt and Todd Miller, but the code differs.
+ */
+
+#include <sys/stat.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+
+char *
+mkdtemp(char *path)
+{
+	char		*start, *cp;
+	unsigned	 int tries;
+
+	start = strchr(path, '\0');
+	while (start > path && start[-1] == 'X')
+		start--;
+
+	for (tries = INT_MAX; tries; tries--) {
+		if (mktemp(path) == NULL) {
+			errno = EEXIST;
+			return(NULL);
+		}
+		if (mkdir(path, S_IRUSR | S_IWUSR | S_IXUSR) == 0)
+			return(path);
+		if (errno != EEXIST)
+			return(NULL);
+		for (cp = start; *cp != '\0'; cp++)
+			*cp = 'X';
+	}
+	errno = EEXIST;
+	return(NULL);
+}
+
+#endif