1 files changed, 61 insertions, 0 deletions

diff --git a/openbsd-compat/posix_win.c b/openbsd-compat/posix_win.c
new file mode 100644
index 0000000..eac67c2
--- /dev/null
+++ b/openbsd-compat/posix_win.c
@@ -0,0 +1,61 @@
+/*
+ * Public domain
+ *
+ * File IO compatibility shims
+ * Brent Cook <bcook@openbsd.org>
+ */
+
+#define NO_REDEF_POSIX_FUNCTIONS
+
+#include <windows.h>
+
+#include <errno.h>
+#include <io.h>
+
+#include "posix_win.h"
+
+int
+posix_open(const char *path, ...)
+{
+        va_list ap;
+        int mode = 0;
+        int flags;
+
+        va_start(ap, path);
+        flags = va_arg(ap, int);
+        if (flags & O_CREAT)
+                mode = va_arg(ap, int);
+        va_end(ap);
+
+        flags |= O_BINARY | O_NOINHERIT;
+
+        return (open(path, flags, mode));
+}
+
+int
+posix_close(int fd)
+{
+        return (close(fd));
+}
+
+ssize_t
+posix_read(int fd, void *buf, size_t count)
+{
+        if (count > INT_MAX) {
+                errno = EINVAL;
+                return (-1);
+        }
+
+        return (read(fd, buf, (unsigned int)count));
+}
+
+ssize_t
+posix_write(int fd, const void *buf, size_t count)
+{
+        if (count > INT_MAX) {
+                errno = EINVAL;
+                return (-1);
+        }
+
+        return (write(fd, buf, (unsigned int)count));
+}