/*

 * lftp - file transfer program

 *

 * Copyright (c) 1996-2012 by Alexander V. Lukyanov (lav@yars.free.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 3 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, see <http://www.gnu.org/licenses/>.

 */

#include <config.h>

#include <errno.h>

#include <unistd.h>

#include "FileFeeder.h"

const char *FileFeeder::NextCmd(CmdExec *exec, const char *)

{

   int fd=in->getfd();

   if(fd<0)

   {

      if(in->error())

      {

	 fprintf(stderr,"source: %s\n",in->error_text.get());

	 return 0;

      }

      return "";

   }

   if(fg_data==0)

      fg_data=new FgData(in->GetProcGroup(),true);

   int res=read(fd,buffer,sizeof(buffer)-1);

   if(res==0)

   {

      return 0;

   }

   if(res<0)

   {

      if(E_RETRY(errno))

      {

	 exec->Block(fd,POLLIN);

	 return "";

      }

      if(SMTask::NonFatalError(errno))

	 return "";

      perror("source");

      return 0;

   }

   buffer[res]=0;

   return buffer;

}

FileFeeder::FileFeeder(FDStream *in)

 : in(in)

{

}

FileFeeder::~FileFeeder()

{

}