--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/substdio.c	Thu Nov 01 14:46:11 2007 +0100
@@ -0,0 +1,15 @@
+#include "substdio.h"
+
+void substdio_fdbuf(s,op,fd,buf,len)
+register substdio *s;
+register int (*op)();
+register int fd;
+register char *buf;
+register int len;
+{
+  s->x = buf;
+  s->fd = fd;
+  s->op = op;
+  s->p = 0;
+  s->n = len;
+}