1 files changed, 45 insertions, 0 deletions
diff --git a/sys/gio/nsppkern/gktmfopen.x b/sys/gio/nsppkern/gktmfopen.x
new file mode 100644
index 00000000..97ab92f9
--- /dev/null
+++ b/sys/gio/nsppkern/gktmfopen.x
@@ -0,0 +1,45 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<knet.h>
+include	<mach.h>
+include	<fset.h>
+include	"gkt.h"
+
+define	SZ_DDSTR	256
+
+
+# GKT_MFOPEN -- Open the NSPP metacode output file.  The device is connected
+# to FIO as a binary file.  Metacode output to the device will be spooled
+# and then disposed of to the device when the file descriptor we return is
+# later closed.
+
+int procedure gkt_mfopen (tty, mode)
+
+pointer	tty			# pointer to graphcap entry for device
+int	mode			# access mode
+
+int	fd
+pointer	sp, ddstr
+int	fopnbf(), ttygets()
+extern	zopnpl(), zardpl(), zawrpl(), zawtpl(), zsttpl(), zclspl()
+errchk	fopnbf
+
+begin
+	call smark (sp)
+	call salloc (ddstr, SZ_DDSTR, TY_CHAR)
+
+	# The DD string is used to pass device dependent information to the
+	# NSPP graphics device driver.
+
+	if (ttygets (tty, "DD", Memc[ddstr], SZ_DDSTR) <= 0)
+	    call error (1, "nsppkern: missing DD parameter in graphcap")
+
+	fd = fopnbf (Memc[ddstr], mode,
+	    zopnpl, zardpl, zawrpl, zawtpl, zsttpl, zclspl)
+
+	# Set the FIO buffer size to the size of a metafile record.
+	call fseti (fd, F_BUFSIZE, SZ_MFRECORD)
+
+	call sfree (sp)
+	return (fd)
+end