/*
 * realpwd.cc: Part of GNU CSSC.
 *
 * Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007,
 * 2008, 2009, 2010, 2001, 2014, 2019 Free Software Foundation, Inc.
 * 
 * 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/>.
 *
 * Program for getting the canonical form of the current directory.
 */

#include "config.h"

#include <stddef.h>
#include <assert.h>
#include <unistd.h>
#include <string.h>


static const char *
get_current_directory()
{
  size_t len = 1;
  char *p;

  for (;;)
    {
      if (NULL != (p = new char[len]))
        {
          if ( NULL != getcwd(p, len) ) // success!
            {
              return p;
            }
          else
            {
              len *= 2;         // try a larger buffer.
            }
          delete[] p;
        }
      else                      // allocation failed.
        {
          return ".";   // this is a cop-out really.
        }
    }
}



int main(int argc, char *argv[])
{
  const char newline[1] = { '\n' };
  const char *dir = get_current_directory();
  (void) argc;
  (void) argv;
  write(1, dir, strlen(dir));
  write(1, newline, 1);
  return 0;
}
