1 files changed, 65 insertions, 0 deletions
diff --git a/devel/got/files/openbsd-compat/open.c b/devel/got/files/openbsd-compat/open.c
new file mode 100644
index 000000000000..fa9207c0814e
--- /dev/null
+++ b/devel/got/files/openbsd-compat/open.c
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2020 Christian Weisgerber <naddy@FreeBSD.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.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdarg.h>
+
+/*
+ * POSIX mandates that open(symlink, O_NOFOLLOW) fail with errno == ELOOP.
+ * FreeBSD chooses to deviate from this, but Got depends on it.
+ */
+int
+open_posix(const char *path, int flags, ...)
+{
+	va_list ap;
+	mode_t mode;
+	int ret;
+
+	if (flags & O_CREAT) {
+		va_start(ap, flags);
+		mode = va_arg(ap, int);
+		va_end(ap);
+		ret = open(path, flags, mode);
+	} else
+		ret = open(path, flags);
+
+	if (ret == -1 && (flags & O_NOFOLLOW) && errno == EMLINK)
+		errno = ELOOP;
+
+	return (ret);
+}
+
+int
+openat_posix(int fd, const char *path, int flags, ...)
+{
+	va_list ap;
+	mode_t mode;
+	int ret;
+
+	if (flags & O_CREAT) {
+		va_start(ap, flags);
+		mode = va_arg(ap, int);
+		va_end(ap);
+		ret = openat(fd, path, flags, mode);
+	} else
+		ret = openat(fd, path, flags);
+
+	if (ret == -1 && (flags & O_NOFOLLOW) && errno == EMLINK)
+		errno = ELOOP;
+
+	return (ret);
+}