/*
  Copyright 2009 Nathan Phillip Brink

  This file is a part of DistRen.

  DistRen is free software: you can redistribute it and/or modify
  it under the terms of the GNU Affero General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  DistRen 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 Affero General Public License for more details.

  You should have received a copy of the GNU Affero General Public License
  along with DistRen.  If not, see <http://www.gnu.org/licenses/>.

*/

#include "remoteio.h"
#include "execio.h"

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

/**
   @todo there must be passage of a configuratoin struct to allow configuration of different ssh clients.
 */
int remoteio_open(struct remoteio **rem, char *servername)
{
  char *sshargs[] = {"ssh", servername, "distrend", "-d", (char *)NULL};
  int rtn;

  *rem = malloc(sizeof(struct remoteio));
  rtn = execio_open( &(*rem)->execio, "ssh", sshargs);
  if(rtn)
    {
      fprintf(stderr, "error opening remoteio channel to server ``%s''" , servername);
      free(*rem);
      return 1;
    }
  
  return 0;
}


int remoteio_read(struct remoteio *rem, void *buf, size_t len, size_t *bytesread)
{
  return execio_read(rem->execio, buf, len, bytesread);
}

int remoteio_write(struct remoteio *rem, void *buf, size_t len, size_t *byteswritten)
{
  return execio_write(rem->execio, buf, len, byteswritten);
}

int remoteio_close(struct remoteio *rem)
{
  int rtn;
  
  rtn = execio_close(rem->execio);
  free(rem);
  
  return 0 + rtn;
}