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## Copyright (C) 1994-2013 John W. Eaton
##
## This file is part of Octave.
##
## Octave 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 3 of the License, or (at
## your option) any later version.
##
## Octave 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 Octave; see the file COPYING. If not, see
## <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Function File} {} dump_prefs ()
## @deftypefnx {Function File} {} dump_prefs (@var{fid})
## Dump all of the current user preference variables in a format that can be
## parsed by Octave later. @var{fid} is a file descriptor as returned by
## @code{fopen}. If @var{file} is omitted, the listing is printed to stdout.
## @end deftypefn
## Author: jwe
function dump_prefs (file)
if (nargin == 0)
file = stdout;
endif
## FIXME -- it would be nice to be able to get the list of
## built-in variables directly from Octave so that we wouldn't have to
## remember to update it each time the list of preference variables
## changes
## Note that these are no longer variables.
sym_list = ["EDITOR";
"EXEC_PATH";
"IMAGE_PATH";
"PAGER";
"PS1";
"PS2";
"PS4";
"beep_on_error";
"completion_append_char";
"crash_dumps_octave_core";
"echo_executing_commands";
"fixed_point_format";
"gnuplot_binary";
"gnuplot_command_end";
"gnuplot_command_plot";
"gnuplot_command_replot";
"gnuplot_command_splot";
"gnuplot_command_title";
"gnuplot_command_using";
"gnuplot_command_with";
"history_file";
"history_size";
"ignore_function_time_stamp";
"info_file";
"info_program";
"makeinfo_program";
"max_recursion_depth";
"output_max_field_width";
"output_precision";
"page_output_immediately";
"page_screen_output";
"print_answer_id_name";
"print_empty_dimensions";
"save_precision";
"saving_history";
"sighup_dumps_octave_core";
"sigterm_dumps_octave_core";
"silent_functions";
"split_long_rows";
"string_fill_char";
"struct_levels_to_print";
"suppress_verbose_help_message"];
for i = 1:rows (sym_list)
sym = deblank (sym_list(i,:));
try
val = feval (sym);
if (isnumeric (val))
val = sprintf ("%g", val);
endif
fprintf (file, " %s = %s\n", sym, val);
catch
fprintf (file, "# %s = <no value or error in displaying it>\n", sym);
end_try_catch
endfor
endfunction
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