1 files changed, 39 insertions, 0 deletions
diff --git a/sys/fio/awaitb.x b/sys/fio/awaitb.x
new file mode 100644
index 00000000..3d27f748
--- /dev/null
+++ b/sys/fio/awaitb.x
@@ -0,0 +1,39 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<mach.h>
+include	<config.h>
+include	<fio.h>
+
+# AWAITB -- Wait for any pending i/o operations on a file to complete.
+# Must be called after an AREADB or AWRITEB (to check for an i/o error
+# and for synchronization) or an abort will result.
+
+int procedure awaitb (fd)
+
+int	fd
+int	nbytes, nchars
+include	<fio.com>
+
+begin
+	fp = fiodes[fd]
+
+	if (FFIOMODE(fp) == INACTIVE)
+	    return (FNBYTES(fp))
+	else
+	    call zcall2 (ZAWTBF(fp), FCHAN(fp), nbytes)
+
+	nchars = nbytes
+	if (nbytes >= 0)
+	    nchars = (nbytes + SZB_CHAR-1) / SZB_CHAR
+
+	FNBYTES(fp)  = nbytes
+	FILSTAT(fp)  = nchars
+
+	FCIOMODE(fp) = INACTIVE			# clear channel
+	FFIOMODE(fp) = INACTIVE			# complete fd request
+
+	if (nbytes >= 0)
+	    return (nbytes)
+	else
+	    return (ERR)
+end