1 files changed, 40 insertions, 0 deletions
diff --git a/sys/mtio/mtlocknam.x b/sys/mtio/mtlocknam.x
new file mode 100644
index 00000000..0820645a
--- /dev/null
+++ b/sys/mtio/mtlocknam.x
@@ -0,0 +1,40 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<ctype.h>
+include	<chars.h>
+include	"mtio.h"
+
+# MT_LOCKNAME -- Generate the file name of the magtape lock file, given the
+# logical drive name.  We are called from a z-routine, so do not use any high
+# level i/o routines.  The generated lockfile name is of the form
+#
+#		[node!]dir$mta.lok
+#
+# The lock file is maintained on the same node as the drive to which it
+# refers.
+
+procedure mt_lockname (device, lockfile, maxch)
+
+char	device[ARB]		#I device name
+char	lockfile[maxch]		#O receives generated lockfile name
+int	maxch			#I max chars out
+
+int	ip, op
+int	gstrcpy(), strlen()
+
+begin
+	lockfile[1] = EOS
+
+	# Copy the node name prefix, if any.
+	call ki_xnode (device, lockfile, maxch)
+	op = strlen (lockfile) + 1
+	ip = op
+
+	# Add the directory name prefix, "mt", and device name.
+	op = op + gstrcpy (LOCKLDIR, lockfile[op], maxch-op+1)
+	op = op + gstrcpy (LOCKFILE,  lockfile[op], maxch-op+1)
+	op = op + gstrcpy (device[ip], lockfile[op], maxch-op+1)
+
+	# Add file extension.
+	op = op + gstrcpy (LOCKEXTN,  lockfile[op], maxch-op+1)
+end