1 files changed, 32 insertions, 0 deletions
diff --git a/sys/tty/ttyclln.x b/sys/tty/ttyclln.x
new file mode 100644
index 00000000..34e57328
--- /dev/null
+++ b/sys/tty/ttyclln.x
@@ -0,0 +1,32 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<chars.h>
+include	"tty.h"
+
+# TTYCLEARLN -- Clear the current line.  The cursor is left positioned at the
+# left margin.  If the clear has to be performed by overwriting the line with
+# blanks, the final column is not cleared.
+
+procedure ttyclearln (fd, tty)
+
+int	fd
+pointer	tty
+pointer	sp, buf
+int	nchars, ttygets()
+errchk	salloc, ttygets, putc, ttywrite, fprintf, pargi
+
+begin
+	call smark (sp)
+	call salloc (buf, SZ_CTRLSTR, TY_CHAR)
+
+	nchars = ttygets (tty, "ce", Memc[buf], SZ_CTRLSTR)
+	if (nchars > 0) {
+	    call putci (fd, '\r')
+	    call ttywrite (fd, tty, Memc[buf], nchars, 1)
+	} else {
+	    call fprintf (fd, "\r%*w\r")
+		call pargi (T_NCOLS(tty) - 1)
+	}
+
+	call sfree (sp)
+end