(* libguestfs * Copyright (C) 2009-2010 Red Hat Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *) (* Please read generator/README first. *) open Unix open Printf open Generator_utils (* 'pr' prints to the current output file. *) let chan = ref Pervasives.stdout let lines = ref 0 let pr fs = ksprintf (fun str -> let i = count_chars '\n' str in lines := !lines + i; output_string !chan str ) fs let output_to filename k = let filename_new = filename ^ ".new" in chan := open_out filename_new; k (); close_out !chan; chan := Pervasives.stdout; (* Is the new file different from the current file? *) if Sys.file_exists filename && files_equal filename filename_new then unlink filename_new (* same, so skip it *) else ( (* different, overwrite old one *) (try chmod filename 0o644 with Unix_error _ -> ()); rename filename_new filename; chmod filename 0o444; printf "written %s\n%!" filename; ) let get_lines_generated () = !lines