// $Id: getvservervdir.c 1954 2005-03-22 14:59:46Z ensc $    --*- c -*--

// Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
//  
// 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; version 2 of the License.
//  
// 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.


#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include "vserver.h"
#include "internal.h"
#include "pathconfig.h"

#include <string.h>
#include <unistd.h>
#include <sys/param.h>
#include <fcntl.h>

static char *
getDir(char *dir, bool physical)
{
  int		fd;
  char		tmp[PATH_MAX];

  if (!physical) return strdup(dir);

  fd = open(".", O_RDONLY);
  if (fd==-1) return 0;

  if (chdir(dir)!=-1 &&
      getcwd(tmp, sizeof tmp)!=0)
    dir = strdup(tmp);
  else
    dir = 0;

  if (fchdir(fd)==-1) {
    if (write(2, "FATAL error: failed to restore directory\n", 41)!=41) { /*...*/ }
    abort();
  }
  close(fd);
  return dir;
}
       
char *
vc_getVserverVdir(char const *id, vcCfgStyle style, bool physical)
{
  size_t		l1   = strlen(id);
  char			*res = 0;

  if (style==vcCFG_NONE || style==vcCFG_AUTO)
    style = vc_getVserverCfgStyle(id);

  switch (style) {
    case vcCFG_NONE		:  return 0;
    case vcCFG_LEGACY		:
    {
      char		buf[sizeof(DEFAULT_VSERVERDIR "/") + l1];

      strcpy(buf,                                    DEFAULT_VSERVERDIR "/");
      strcpy(buf+sizeof(DEFAULT_VSERVERDIR "/") - 1, id);

      res = getDir(buf, physical);
      break;
    }
    
    case vcCFG_RECENT_SHORT	:
    {
      char		buf[sizeof(CONFDIR) + l1 + sizeof("//vdir") - 1];

      strcpy(buf,                            CONFDIR "/");
      strcpy(buf+sizeof(CONFDIR "/")    - 1, id);
      strcpy(buf+sizeof(CONFDIR "/")+l1 - 1, "/vdir");
      
      res = getDir(buf, physical);
      break;
    }

    case vcCFG_RECENT_FULL	:
    {
      char		buf[l1 + sizeof("/vdir")];

      strcpy(buf,    id);
      strcpy(buf+l1, "/vdir");

      res = getDir(buf, physical);
      break;
    }

    default			:  return 0;
  }

  // ignore physical-case; we went into the directory while determining
  // the physical path so the directory exists
  if (!physical && !utilvserver_isDirectory(res, true)) {
    free(res);
    res = 0;
  }

  return res;
}