diff --git a/scsh/flock.c b/scsh/flock.c
new file mode 100644
index 0000000..6dd9d64
--- /dev/null
+++ b/scsh/flock.c
@@ -0,0 +1,52 @@
+/* This is an Scheme48/C interface file, 
+** automatically generated by cig.
+*/
+
+#include <stdio.h>
+#include <stdlib.h> /* For malloc. */
+#include "libcig.h"
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+
+/* Make sure foreign-function stubs interface to the C funs correctly: */
+#include "flock1.h"
+
+#define errno_or_false(x) (((x) == -1) ? ENTER_FIXNUM(errno) : SCHFALSE)
+
+scheme_value df_set_lock(long nargs, scheme_value *args)
+{
+    extern int set_lock(int , int , int , int , int , int );
+    scheme_value ret1;
+    int r1;
+
+    cig_check_nargs(6, nargs, "set_lock");
+    r1 = set_lock(EXTRACT_FIXNUM(args[5]), EXTRACT_FIXNUM(args[4]), EXTRACT_FIXNUM(args[3]), EXTRACT_FIXNUM(args[2]), EXTRACT_FIXNUM(args[1]), EXTRACT_FIXNUM(args[0]));
+    ret1 = errno_or_false(r1);
+    return ret1;
+    }
+
+scheme_value df_get_lock(long nargs, scheme_value *args)
+{
+    extern int get_lock(int , int , int , int , int , int , int *, int *, int *, int *, int *);
+    scheme_value ret1;
+    int r1;
+    int r2;
+    int r3;
+    int r4;
+    int r5;
+    int r6;
+
+    cig_check_nargs(7, nargs, "get_lock");
+    r1 = get_lock(EXTRACT_FIXNUM(args[6]), EXTRACT_FIXNUM(args[5]), EXTRACT_FIXNUM(args[4]), EXTRACT_FIXNUM(args[3]), EXTRACT_FIXNUM(args[2]), EXTRACT_FIXNUM(args[1]), &r2, &r3, &r4, &r5, &r6);
+    ret1 = errno_or_false(r1);
+    VECTOR_REF(*args,0) = ENTER_FIXNUM(r2);
+    VECTOR_REF(*args,1) = ENTER_FIXNUM(r3);
+    VECTOR_REF(*args,2) = ENTER_FIXNUM(r4);
+    VECTOR_REF(*args,3) = ENTER_FIXNUM(r5);
+    VECTOR_REF(*args,4) = ENTER_FIXNUM(r6);
+    return ret1;
+    }
+