1 files changed, 26 insertions, 0 deletions
diff --git a/sys/mtio/mtneedf.x b/sys/mtio/mtneedf.x
new file mode 100644
index 00000000..9c334949
--- /dev/null
+++ b/sys/mtio/mtneedf.x
@@ -0,0 +1,26 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include "mtio.h"
+
+# MTNEEDFILENO -- Returns YES if no file number is specified in mtname, or
+# NO if a file is specified.
+
+int procedure mtneedfileno (mtname)
+
+char	mtname[ARB]			#I magtape device specification
+
+int	fileno, recno
+pointer	sp, device, devcap
+int	btoi()
+
+begin
+	call smark (sp)
+	call salloc (device, SZ_DEVICE, TY_CHAR)
+	call salloc (devcap, SZ_DEVCAP, TY_CHAR)
+
+	call mtparse (mtname, Memc[device], SZ_DEVICE, fileno, recno,
+	    Memc[devcap], SZ_DEVCAP)
+
+	call sfree (sp)
+	return (btoi(fileno == ERR))
+end