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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));
+}