File: jskeepalive.c

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joystick 20051019-12
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/*
 * jskeepalive.c  Version 1.0
 *
 * Copyright © 2010 Stephen Kitt
 *
 * Based on jstest.c
 */

/*
 * 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 St, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 *
 * Should you need to contact me, the author, you can do so by email
 * at <steve@sk2.org>.
 */

#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>

#include <linux/joystick.h>

int main (int argc, char **argv)
{
  int fd;
  struct js_event js;
  
  if (argc != 2 || !strcmp("--help", argv[1])) {
    puts("");
    puts("Usage: jskeepalive <device>");
    puts("");
    return 1;
  }
  
  if ((fd = open(argv[argc - 1], O_RDONLY)) < 0) {
    perror("jskeepalive");
    return 1;
  }
  
  while (1) {
    if (read(fd, &js, sizeof(struct js_event)) != sizeof(struct js_event)) {
      perror("\njskeepalive: error reading");
      return 1;
    }
  }
  
  return -1;
}