Initial commit

1 files changed, 49 insertions, 0 deletions

diff --git a/sys/ki/kzwrmt.x b/sys/ki/kzwrmt.x
new file mode 100644
index 00000000..74ae0dd9
--- /dev/null
+++ b/sys/ki/kzwrmt.x
@@ -0,0 +1,49 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<mach.h>
+include	<config.h>
+include	"ki.h"
+
+# KZWRMT -- Asynchronous write to a magtape file.
+
+procedure kzwrmt (chan, buf, nbytes, offset)
+
+int	chan			#I magtape channel
+char	buf[ARB]		#I buffer containing data
+int	nbytes			#I nbytes to write
+long	offset			#I file offset
+
+int	server
+int	ki_send()
+include	"kichan.com"
+include	"kii.com"
+
+begin
+	server = k_node[chan]
+
+	if (server == NULL) {
+	    call zzwrmt (k_oschan[chan], buf, nbytes, offset)
+	    return
+	}
+
+	# Ignore zero writes and requests on a node closed by an error.
+	if (nbytes <= 0) {
+	    k_status[chan] = 0
+	    return
+	}
+
+	# Send the request followed by the data block.  We do not read anything
+	# back from the remote server until ZAWT is called.  Set k_status[chan]
+	# to WRITE_IN_PROGRESS to tell ZAWT that an await call is needed.
+
+	p_arg[1] = k_oschan[chan]
+	p_arg[2] = nbytes
+	p_arg[3] = offset
+
+	if (ki_send (server, KI_ZFIOMT, MT_WR) == ERR)
+	    k_status[chan] = ERR
+	else {
+	    call ks_awrite (server, buf, nbytes)
+	    call ks_await  (server, k_status[chan])
+	}
+end