ocpnhelper.c

/***************************************************************************
 *   Copyright (C) 2006 by dsr   *
 *   dsr@mshome.net   *
 *                                                                         *
 *   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.         *
 ***************************************************************************/
 
#include <unistd.h>
#include <stdlib.h>
#include <syslog.h>
#include <signal.h>
#include <errno.h>
#include <ctype.h>
#include <fcntl.h>
#include <string.h>
#include <stdarg.h>
#include <setjmp.h>
#include <stdio.h>
#include <assert.h>
#include <pwd.h>
#include <stdbool.h>
 
int main(int argc, char *argv[]) {
  int option, debuglevel;
 
  int inF, ouF, bytes;
  char line[512];
 
  while ((option = getopt(argc, argv, "D:SBUV")) != -1) {
    switch (option) {
      case 'B': {
        inF = open("/proc/tty/driver/usb-serial", O_RDONLY);
        if (inF == -1) inF = open("/proc/tty/driver/usbserial", O_RDONLY);
 
        if (inF != -1) {
          if ((ouF = open("/var/tmp/usbserial", O_WRONLY | O_CREAT | O_TRUNC,
                          0777)) != -1) {
            while ((bytes = read(inF, line, sizeof(line))) > 0)
              write(ouF, line, bytes);
            close(ouF);
          }
          close(inF);
        }
        break;
      }
 
      case 'S': {
        inF = open("/proc/tty/driver/serial", O_RDONLY);
 
        if (inF != -1) {
          if ((ouF = open("/var/tmp/serial", O_WRONLY | O_CREAT | O_TRUNC,
                          0777)) != -1) {
            while ((bytes = read(inF, line, sizeof(line))) > 0)
              write(ouF, line, bytes);
            close(ouF);
          }
          close(inF);
        }
        break;
      }
 
      case 'U': {
        /*  Kill the helper files  */
        unlink("/var/tmp/usbserial");
        unlink("/var/tmp/serial");
        break;
      }
 
      case 'D': {
        debuglevel = (int)strtol(optarg, 0, 0);
        break;
      }
 
      case 'V': {
        (void)printf("ocpnhelper %s\n", VERSION);
        exit(0);
      }
 
      case 'h':
      case '?':
      default: {
        //                usage();
        exit(0);
      }
    }
  }
 
  return 0;
}