1 files changed, 32 insertions, 0 deletions
diff --git a/sys/fmio/fmlfbwt.x b/sys/fmio/fmlfbwt.x
new file mode 100644
index 00000000..2310c281
--- /dev/null
+++ b/sys/fmio/fmlfbwt.x
@@ -0,0 +1,32 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<knet.h>
+include	"fmio.h"
+
+# FM_LFBINWAIT -- Wait for i/o on a binary lfile.
+
+procedure fm_lfbinwait (lf, status)
+
+pointer	lf			#I lfile descriptor
+int	status			#O i/o status (nbytes transferred or ERR)
+
+pointer	fm
+int	chan
+
+begin
+	fm = LF_FM(lf)
+	chan = FM_CHAN(fm)
+
+	# Wait for i/o and increment byte count.
+	if (and (LF_FLAGS(lf), LFF_IOINPROGRESS) != 0) {
+	    call zawtbf (chan, status)
+	    if (status >= 0)
+		LF_STATUS(lf) = LF_STATUS(lf) + min(LF_LTSIZE(lf),status)
+	    else
+		LF_STATUS(lf) = ERR
+	    LF_FLAGS(lf) = and (LF_FLAGS(lf), not(LFF_IOINPROGRESS))
+	}
+
+	call fmio_tick (fm)
+	status = LF_STATUS(lf)
+end