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diff --git a/sys/imio/iki/plf/plfcopy.x b/sys/imio/iki/plf/plfcopy.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<error.h>
+include	"plf.h"
+
+# PLF_COPY -- Copy an image.  A special operator is provided for fast, blind
+# copies of entire images.
+
+procedure plf_copy (kernel, old_root, old_extn, new_root, new_extn, status)
+
+int	kernel			#I IKI kernel
+char	old_root[ARB]		#I old image root name
+char	old_extn[ARB]		#I old image extn
+char	new_root[ARB]		#I new image root name
+char	new_extn[ARB]		#I new extn
+int	status			#O output status
+
+pointer	sp
+pointer	oldname, newname
+
+begin
+	call smark (sp)
+	call salloc (oldname, SZ_PATHNAME, TY_CHAR)
+	call salloc (newname, SZ_PATHNAME, TY_CHAR)
+
+	# Get filename of old and new images.
+	call iki_mkfname (old_root, old_extn, Memc[oldname], SZ_PATHNAME)
+	call iki_mkfname (new_root, PLF_EXTN, Memc[newname], SZ_PATHNAME)
+
+	# Copy the PLIO mask save file.
+	iferr (call fcopy (Memc[oldname], Memc[newname])) {
+	    call erract (EA_WARN)
+	    status = ERR
+	} else
+	    status = OK
+
+	call sfree (sp)
+end