options.c

网络端口的服务程序

/*
    Portserver - Use RTERM protocol to serve serial ports over a network
    Copyright (C) 1998 Kenn Humborg

    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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

/* Command line option processing */

#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>

#include "options.h"


struct command_line_options cmd_options;


static void SetDefaultOptions(void);



STATUS ParseCommandLine(int argc, char **argv)
{
   int longindex;
   int retval;
   struct option longopts[] = {
      { "config-file", required_argument, NULL, 'f' },
      { NULL, 0, NULL, 0 }
   };

   SetDefaultOptions();

   while (1) {

      longindex = 0;
      retval = getopt_long(argc, argv, "f:", longopts, &longindex);

      switch (retval) {
         case EOF: {
            return SUCCESS;
         }
         case '?':
         case ':': {
            return ERR_CMDSYNTAX;
         }

         case 'f': {
            cmd_options.config_file = optarg;
            break;
         }

         default: {
            syslog(LOG_WARNING, "Unexpected return from getopt_long: %c", retval);
            break;
         }
      }
   }
}


static void SetDefaultOptions(void)
{
   cmd_options.config_file = "/etc/portserver.conf";
}