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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: cachefile.cc,v 1.1 1999/04/18 06:36:36 jgg Exp $
/* ######################################################################
CacheFile - Simple wrapper class for opening, generating and whatnot
This class implements a simple 2 line mechanism to open various sorts
of caches. It can operate as root, as not root, show progress and so on,
it transparently handles everything necessary.
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#ifdef __GNUG__
#pragma implementation "apt-pkg/cachefile.h"
#endif
#include <apt-pkg/cachefile.h>
#include <apt-pkg/error.h>
#include <apt-pkg/sourcelist.h>
#include <apt-pkg/pkgcachegen.h>
#include <apt-pkg/configuration.h>
/*}}}*/
// CacheFile::CacheFile - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* */
pkgCacheFile::pkgCacheFile() : Map(0), Cache(0), Lock()
{
}
/*}}}*/
// CacheFile::~CacheFile - Destructor /*{{{*/
// ---------------------------------------------------------------------
/* */
pkgCacheFile::~pkgCacheFile()
{
delete Cache;
delete Map;
delete Lock;
}
/*}}}*/
// CacheFile::Open - Open the cache files, creating if necessary /*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgCacheFile::Open(OpProgress &Progress,bool WithLock)
{
if (WithLock == true)
Lock = new pkgDpkgLock;
if (_error->PendingError() == true)
return false;
// Read the source list
pkgSourceList List;
if (List.ReadMainList() == false)
return _error->Error("The list of sources could not be read.");
/* Build all of the caches, using the cache files if we are locking
(ie as root) */
if (WithLock == true)
{
pkgMakeStatusCache(List,Progress);
Progress.Done();
if (_error->PendingError() == true)
return _error->Error("The package lists or status file could not be parsed or opened.");
if (_error->empty() == false)
_error->Warning("You may want to run apt-get update to correct theses missing files");
// Open the cache file
FileFd File(_config->FindFile("Dir::Cache::pkgcache"),FileFd::ReadOnly);
if (_error->PendingError() == true)
return false;
Map = new MMap(File,MMap::Public | MMap::ReadOnly);
if (_error->PendingError() == true)
return false;
}
else
{
Map = pkgMakeStatusCacheMem(List,Progress);
Progress.Done();
if (Map == 0)
return false;
}
// Create the dependency cache
Cache = new pkgDepCache(*Map,Progress);
if (_error->PendingError() == true)
return false;
Progress.Done();
return true;
}
/*}}}*/
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