/* This file is part of NSsync -*- c -*-
   Copyright (C) 2011-2017 Sergey Poznyakoff
  
   NSsync 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, or (at your option)
   any later version.
  
   NSsync 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 NSsync.  If not, see <http://www.gnu.org/licenses/>. */

#ifdef HAVE_GETOPT_H
# include <getopt.h>
#endif
#include <unistd.h>

static struct grecs_txtacc *pp_cmd_acc;
static char *program_name;

OPTIONS_BEGIN("nssync",
              [<Synchronize DLZ database with DNS configuration>],
	      [<>],
	      [<gnu>],
              [<copyright_year=2011-2017>],
              [<copyright_holder=Sergey Poznyakoff>])

OPTION(lint,t,,
       [<parse configuration file and exit>])
BEGIN
	lint_mode = 1;
END

OPTION(,E,,
       [<preprocess config and exit>])
BEGIN
	preprocess_only = 1;
END

OPTION(dry-run,n,,
       [<do nothing, print almost everything; implies `--debug',
         use additional `--debug' options to get even more info>])
BEGIN
	debug_level++;
	dry_run_mode = 1;
END

OPTION(force,f,,
       [<proceed even if slave status has not changed>])
BEGIN
	force = 1;
END

OPTION(config-file,c,FILE,
       [<use FILE instead of the default configuration>])
BEGIN
	config_file = optarg;
END

OPTION(cron,,,
       [<run as a periodic cron job (default)>])
BEGIN	
	server_mode = 0;
END

OPTION(server,s,,
       [<run as a server>])
BEGIN
	server_mode = 1;
END

OPTION(foreground,F,,
       [<remain in foreground when in server mode>])
BEGIN
	foreground = 1;
END

OPTION(syslog,S,,
       [<report errors via syslog>])
BEGIN
	syslog_option = 1;
END

GROUP(Preprocessor control)

OPTION(include-directory,I,DIR,
       [<add include directory>])
BEGIN
	grecs_preproc_add_include_dir(optarg);
END

OPTION(define,D,SYMBOL[=VALUE],
       [<define a preprocessor symbol>])
BEGIN
        char *p;

        if (!pp_cmd_acc)
		pp_cmd_acc = grecs_txtacc_create();
        grecs_txtacc_grow(pp_cmd_acc, " \"-D", 4);
        for (p = optarg; *p; p++) {
		if (*p == '\\' || *p == '"')
			grecs_txtacc_grow_char(pp_cmd_acc, '\\');
		grecs_txtacc_grow_char(pp_cmd_acc, *p);
	}
	grecs_txtacc_grow_char(pp_cmd_acc, '"');			
END

OPTION(preprocessor,,COMMAND,
       [<use COMMAND instead of the default preprocessor>])
BEGIN
	grecs_preprocessor = optarg;
END

OPTION(no-preprocessor,,,
       [<disable preprocessing>])
BEGIN
	grecs_preprocessor = NULL;
END

GROUP(Debugging)

OPTION(debug,d,,
       [<increase debug level>])
BEGIN
	debug_level++;
END
	
OPTION(debug-parser,x,,
       [<debug configuration file parser>])
BEGIN
	grecs_gram_trace(1);
END

OPTION(debug-lexer,X,,
       [<debug configuration file lexer>])
BEGIN
	grecs_lex_trace(1);
END

GROUP([<Additional help>])
OPTION(config-help,,,
       [<show configuration file summary>])
BEGIN
	config_help();
        exit(0);
END

OPTIONS_END

void
parse_options(int argc, char *argv[])
{
	program_name = strrchr(argv[0], '/');
	if (program_name)
		program_name++;
	else
		program_name = argv[0];

        GETOPT(argc, argv,, exit(EX_USAGE))
	if (pp_cmd_acc && grecs_preprocessor) {
		char *args, *cmd;

		grecs_txtacc_grow_char(pp_cmd_acc, 0);
		args = grecs_txtacc_finish(pp_cmd_acc, 0);
		cmd = grecs_malloc(strlen(grecs_preprocessor) +
				   strlen(args) + 1);
		strcpy(cmd, grecs_preprocessor);
		strcat(cmd, args);
		grecs_preprocessor = cmd;
	}
	grecs_txtacc_free(pp_cmd_acc);

	syslog_tag = grecs_strdup(program_name);
	if (!pidfile) {
		size_t sz = 0;
		grecs_asprintf(&pidfile, &sz, "%s/%s.pid",
			       LOCALSTATEDIR, program_name);
	}
}