1 files changed, 63 insertions, 0 deletions
diff --git a/sys/ki/kzrwmt.x b/sys/ki/kzrwmt.x
new file mode 100644
index 00000000..38ce6634
--- /dev/null
+++ b/sys/ki/kzrwmt.x
@@ -0,0 +1,63 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<mach.h>
+include	<config.h>
+include	<fio.h>
+include	"ki.h"
+
+# KZRWMT -- Rewind a (nonopen) magtape drive.
+
+procedure kzrwmt (drive, devcap, status)
+
+char	drive[ARB]		#I packed name of drive to be rewound
+char	devcap[ARB]		#I packed tapecap entry for device
+int	status			#O receives status, ok|err
+
+pointer	sp, bp
+int	server, dv_len, dc_len, dc_off, nbytes
+int	ki_connect(), ki_send(), ki_receive(), strlen()
+include	"kii.com"
+
+begin
+	server = ki_connect (drive)
+
+	if (server == NULL) {
+	    call strpak (p_sbuf[p_arg[1]], p_sbuf, SZ_SBUF)
+	    call zzrwmt (p_sbuf, devcap, status)
+
+	} else {
+	    call smark (sp)
+	    call salloc (bp, SZ_COMMAND, TY_CHAR)
+
+	    # Determine whether devcap string will fit in sbuf.
+	    call strupk (devcap, Memc[bp], SZ_COMMAND)
+	    dv_len = strlen (p_sbuf[p_arg[1]])
+	    dc_len = strlen (Memc[bp])
+	    if (dv_len+1 + dc_len > SZ_SBUF) {
+		dc_off = 0
+		nbytes = (dc_len + SZB_CHAR-1) / SZB_CHAR
+	    } else {
+		dc_off = dv_len + 1
+		call strcpy (Memc[bp], p_sbuf[dc_off], ARB)
+		p_sbuflen = dc_off + dc_len
+	    }
+
+	    # Prepare the arguments.
+	    p_arg[2] = dc_off
+	    p_arg[3] = dc_len
+
+	    if (ki_send (server, KI_ZFIOMT, MT_RW) == ERR)
+		status = ERR
+	    else if (dc_len > 0 && dc_off == 0) {
+		call ks_awrite (server, devcap, nbytes)
+		call ks_await (server, status)
+	    }
+
+	    if (ki_receive (server, KI_ZFIOMT, MT_RW) == ERR)
+		status = ERR
+	    else
+		status = p_arg[1]
+
+	    call sfree (sp)
+	}
+end