1 files changed, 15 insertions, 0 deletions

diff --git a/substdio.c b/substdio.c
new file mode 100644
index 0000000..d03dff2
--- /dev/null
+++ b/substdio.c
@@ -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;
+}