Import sources from 2011-03-30 iso image

sys/src/libthread/ioreadn.c

@@ -0,0 +1,23 @@
+#include <u.h>
+#include <libc.h>
+#include <thread.h>
+#include "threadimpl.h"
+
+static long
+_ioreadn(va_list *arg)
+{
+	int fd;
+	void *a;
+	long n;
+
+	fd = va_arg(*arg, int);
+	a = va_arg(*arg, void*);
+	n = va_arg(*arg, long);
+	return readn(fd, a, n);
+}
+
+long
+ioreadn(Ioproc *io, int fd, void *a, long n)
+{
+	return iocall(io, _ioreadn, fd, a, n);
+}