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1 files changed, 48 insertions, 0 deletions

diff --git a/sys/ki/kbzstt.x b/sys/ki/kbzstt.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<mach.h>
+include	<config.h>
+include	<fio.h>
+include	"ki.h"
+
+# KB_ZSTT -- Get file status on a binary device.  We are called only if the
+# device does not reside on the local node.
+
+procedure kb_zstt (device, chan, what, lvalue)
+
+int	device			# device driver code
+int	chan			# channel assigned device
+int	what			# file parameter to be returned
+long	lvalue			# receives the parameter value
+
+int	server, ks_maxbufsize
+int	ki_sendrcv()
+include	"kichan.com"
+include	"kinode.com"
+include	"kii.com"
+data	ks_maxbufsize /-1/
+
+begin
+	server   = k_node[chan]
+	p_arg[1] = k_oschan[chan]
+	p_arg[2] = what
+
+	if (ki_sendrcv (server, device, BF_STT) == ERR)
+	    lvalue = ERR
+	else {
+	    lvalue = p_arg[1]
+
+	    # The maximum buffer (transfer) size for a device is determined
+	    # by the the network interface or by the device, whichever is
+	    # smaller.
+
+	    if (what == FSTT_MAXBUFSIZE || what == FSTT_OPTBUFSIZE) {
+		if (ks_maxbufsize < 0)
+		    call zsttks (n_kschan[server], FSTT_MAXBUFSIZE, ks_maxbufsize)
+		if (lvalue == 0)
+		    lvalue = ks_maxbufsize
+		else if (ks_maxbufsize > 0)
+		    lvalue = min (lvalue, ks_maxbufsize)
+	    }
+	}
+end