From 7ed28d2f501a4920b792bee9da3d61814f024a4c Mon Sep 17 00:00:00 2001
From: Brent Cook <busterb@gmail.com>
Date: Tue, 7 Oct 2025 05:38:30 -0500
Subject: add mkstemp for msvc builds

---
 tests/compat/mkstemp.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 tests/compat/mkstemp.c

(limited to 'tests/compat')

diff --git a/tests/compat/mkstemp.c b/tests/compat/mkstemp.c
new file mode 100644
index 0000000..fe3d15a
--- /dev/null
+++ b/tests/compat/mkstemp.c
@@ -0,0 +1,52 @@
+/*
+musl as a whole is licensed under the following standard MIT license:
+
+----------------------------------------------------------------------
+Copyright © 2005-2020 Rich Felker, et al.
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+----------------------------------------------------------------------
+*/
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <limits.h>
+#include <errno.h>
+
+#include <io.h>
+
+int mkstemp(char *template)
+{
+	int fd;
+retry:
+	if (!_mktemp(template)) return -1;
+	fd = open(template, O_RDWR | O_CREAT | O_EXCL, 0600);
+	if (fd >= 0) return fd;
+	if (errno == EEXIST) {
+		/* this is safe because mktemp verified
+		 * that we have a valid template string */
+		strcpy(template+strlen(template)-6, "XXXXXX");
+		goto retry;
+	}
+	return -1;
+}
-- 
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