1 files changed, 29 insertions, 0 deletions
diff --git a/unix/boot/bootlib/osopen.c b/unix/boot/bootlib/osopen.c
new file mode 100644
index 00000000..42b3cdeb
--- /dev/null
+++ b/unix/boot/bootlib/osopen.c
@@ -0,0 +1,29 @@
+/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+ */
+
+#include <fcntl.h>
+#include "bootlib.h"
+
+extern 	int  os_createfile (char *fname, int mode, int type);
+
+
+/* OS_OPEN -- Open or create a host system file for reading or writing (text
+ * and binary disk files only).
+ */
+int
+os_open (
+  char	*vfn,			/* file to be opened		*/
+  int	mode,			/* access mode 0=R, 1=W, 2=RW	*/
+  int	type 			/* file type			*/
+)
+{
+	extern	char *vfn2osfn();
+
+	if (mode == 0) {
+	    osfiletype = BINARY_FILE;
+	    return (open (vfn2osfn (vfn, 0), 0));
+	} else if (mode == 1) {
+	    return (os_createfile (vfn, mode, type));
+	} else
+	    return (-1);
+}