This file is indexed.

/usr/bin/ctlib is in ncl-ncarg 6.4.0-9.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#!/bin/csh -f
#
#	$Id: ctlib.csh,v 1.9 2008-07-27 03:58:55 haley Exp $
#
#                Copyright (C)  2000
#        University Corporation for Atmospheric Research
#                All Rights Reserved
#
# The use of this Software is governed by a License Agreement.
#
#	This script simply reports the libraries required by ctrans.
#	The library list will vary depending on machine configuration
#

set libdir = `ncargpath lib`
if ($status != 0) then
	exit 1
endif
if (! -d "$libdir") then
  echo "Library directory <$libdir> does not exist."
  exit 1
endif

set robjdir = $libdir/ncarg/robj

set locals = ""

foreach file (libictrans.o libctrans.o)
  set locals = "$locals $robjdir/$file"
end

foreach file (libcgm.a libncarg_ras.a)
  set locals = "$locals $libdir/$file"
end

echo $locals -lX11 -lXext  -lmfhdfalt -ldfalt -ljpeg -lz -lm