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diff --git a/pkg/utilities/nttools/tcopy/trename.x b/pkg/utilities/nttools/tcopy/trename.x
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+include <error.h>
+
+# trename -- Rename table(s)
+
+# The input tables are given by an filename template list.  The output
+# is either a matching list of tables or a directory.  The number of
+# input tables may be either one or match the number of output tables.
+# This is based on the t_imcopy procedure.
+#
+# Phil Hodge, 21-Aug-1987  Task created.
+# Phil Hodge,  7-Sep-1988  Change parameter names for tables.
+# Phil Hodge, 28-Dec-1989  Use iferr with call to tbtren.
+# Phil Hodge, 16-Mar-1992  Include check to prevent renaming text files.
+# Phil Hodge,  1-Jul-1995  Modify for FITS tables.
+# Phil Hodge, 19-Jul-1995  Replace fnt calls with tbn.
+# B.Simon      5-May-1997  Call rename if renaming entire table
+# B.Simon      9-May-1997  Add table type check
+
+procedure trename()
+
+pointer tablist1		# input table list
+pointer tablist2		# output table list
+bool	verbose			# print operations?
+#--
+pointer sp
+pointer table1			# input table name
+pointer fname1			# input file name (i.e. without brackets)
+pointer cdfname			# input CDF name or EXTNAME
+pointer table2			# output table name
+pointer dir1			# input directory name
+pointer dir2			# output directory name
+
+pointer list1, list2
+int	root_len		# number of char in input directory name
+
+pointer tbnopen()
+int	tbnget(), tbnlen()
+int	fnldir(), isdirectory()
+int	junk, ttype, hdu, tbparse()
+bool	clgetb(), streq()
+
+begin
+	call smark (sp)
+	call salloc (tablist1, SZ_LINE, TY_CHAR)
+	call salloc (tablist2, SZ_LINE, TY_CHAR)
+	call salloc (table1, SZ_LINE, TY_CHAR)
+	call salloc (fname1, SZ_LINE, TY_CHAR)
+	call salloc (cdfname, SZ_LINE, TY_CHAR)
+	call salloc (table2, SZ_LINE, TY_CHAR)
+	call salloc (dir1, SZ_LINE, TY_CHAR)
+	call salloc (dir2, SZ_LINE, TY_CHAR)
+
+	# Get input and output table template lists.
+	call clgstr ("intable", Memc[tablist1], SZ_LINE)
+	call clgstr ("outtable", Memc[tablist2], SZ_LINE)
+
+	verbose = clgetb ("verbose")
+
+	# Check if the output string is a directory.
+
+	if (isdirectory (Memc[tablist2], Memc[dir2], SZ_LINE) > 0 &&
+		!streq (Memc[tablist2], "STDOUT")) {
+
+	    list1 = tbnopen (Memc[tablist1])
+
+	    while (tbnget (list1, Memc[table1], SZ_LINE) != EOF) {
+
+		# Memc[fname1] is the name without any brackets.  We need to
+		# remove brackets because they confuse fnldir, which we use
+		# to get the length of any directory prefix.
+
+		junk = tbparse (Memc[table1], Memc[fname1], Memc[cdfname],
+			SZ_LINE, ttype, hdu)
+		root_len = fnldir (Memc[fname1], Memc[dir1], SZ_LINE)
+
+		# Copy the output directory name to table2, and concatenate
+		# the input file name (without directory prefix and without
+		# the bracket suffix).
+
+		call strcpy (Memc[dir2], Memc[table2], SZ_LINE)
+		call strcat (Memc[fname1+root_len], Memc[table2], SZ_LINE)
+
+		call one_rename (Memc[table1], Memc[table2], verbose)
+	    }
+
+	    call tbnclose (list1)
+
+	} else {
+
+	    # Expand the input and output table lists.
+	    list1 = tbnopen (Memc[tablist1])
+	    list2 = tbnopen (Memc[tablist2])
+
+	    if (tbnlen (list1) != tbnlen (list2)) {
+	        call tbnclose (list1)
+	        call tbnclose (list2)
+	        call error (1, "Number of input and output tables not the same")
+	    }
+
+	    # Rename each table.
+
+	    while ((tbnget (list1, Memc[table1], SZ_LINE) != EOF) &&
+		   (tbnget (list2, Memc[table2], SZ_LINE) != EOF)) {
+
+		call one_rename (Memc[table1], Memc[table2], verbose)
+	    }
+
+	    call tbnclose (list1)
+	    call tbnclose (list2)
+	}
+end
+
+# ONE_RENAME -- Rename a single table
+
+procedure one_rename (oldfile, newfile, verbose)
+
+char	oldfile[ARB]	# i: current file name
+char	newfile[ARB]	# i: new file name
+bool	verbose		# i: print informational message
+#--
+bool	done
+pointer	sp, oldname, newname
+
+bool	streq(), is_wholetab()
+int	access(), tbtacc(), ext_type()
+
+begin
+	call smark (sp)
+	call salloc (oldname, SZ_FNAME, TY_CHAR)
+	call salloc (newname, SZ_FNAME, TY_CHAR)
+
+	# Check to make sure the copy is legal
+
+	done = false
+	if (streq (oldfile, newfile)) {
+	    call eprintf ("Cannot rename table to itself:  %s\n")
+	    call pargstr (oldfile)
+
+	} else if (access (oldfile, 0, TEXT_FILE) == YES) {
+	    call eprintf ("Cannot rename text file with trename: `%s'\n")
+	    call pargstr (oldfile)
+
+	} else if (is_wholetab (oldfile) && is_wholetab (newfile) &&
+		   ext_type (oldfile) == ext_type (newfile)) {
+
+	    # Entire files of the same type are renamed with the fio rename
+
+	    if (tbtacc (oldfile) == NO) {
+		call eprintf ("Can only rename tables with trename: `%s'\n")
+		call pargstr (oldfile)
+
+	    } else {
+		call tbtext (oldfile, Memc[oldname], SZ_FNAME)
+		call tbtext (newfile, Memc[newname], SZ_FNAME)
+
+		iferr (call rename (Memc[oldname], Memc[newname])) {
+		    call erract (EA_WARN)
+		} else {
+		    done = true
+		}
+	    }
+
+	} else {
+	    # Table extensions are renamed by the table 
+	    # library function tbtren
+
+	    iferr (call tbtren (oldfile, newfile)) {
+		call erract (EA_WARN)
+	    } else {
+		done = true
+	    }
+	}
+
+	# Print verbose message
+
+	if (done && verbose) {
+	    call printf ("%s -> %s\n")
+	    call pargstr (oldfile)
+	    call pargstr (newfile)
+	    call flush (STDOUT)
+	}
+
+	call sfree (sp)
+	return
+end