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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: cachefile.cc,v 1.8 2002/04/27 04:28:04 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 /*{{{*/
#include <config.h>
#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>
#include <apt-pkg/policy.h>
#include <apt-pkg/pkgsystem.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/progress.h>
#include <apt-pkg/depcache.h>
#include <apt-pkg/mmap.h>
#include <apt-pkg/pkgcache.h>
#include <string.h>
#include <unistd.h>
#include <string>
#include <vector>
#include <apti18n.h>
/*}}}*/
// CacheFile::CacheFile - Constructor /*{{{*/
pkgCacheFile::pkgCacheFile() : d(NULL), ExternOwner(false), Map(NULL), Cache(NULL),
DCache(NULL), SrcList(NULL), Policy(NULL)
{
}
pkgCacheFile::pkgCacheFile(pkgDepCache * const Owner) : d(NULL), ExternOwner(true),
Map(&Owner->GetCache().GetMap()), Cache(&Owner->GetCache()),
DCache(Owner), SrcList(NULL), Policy(NULL)
{
}
/*}}}*/
// CacheFile::~CacheFile - Destructor /*{{{*/
// ---------------------------------------------------------------------
/* */
pkgCacheFile::~pkgCacheFile()
{
if (ExternOwner == false)
{
delete DCache;
delete Cache;
delete Map;
}
delete Policy;
delete SrcList;
if (ExternOwner == false)
_system->UnLock(true);
}
/*}}}*/
// CacheFile::BuildCaches - Open and build the cache files /*{{{*/
class APT_HIDDEN ScopedErrorMerge {
public:
ScopedErrorMerge() { _error->PushToStack(); }
~ScopedErrorMerge() { _error->MergeWithStack(); }
};
bool pkgCacheFile::BuildCaches(OpProgress *Progress, bool WithLock)
{
if (Cache != NULL)
return true;
ScopedErrorMerge sem;
if (_config->FindB("pkgCacheFile::Generate", true) == false)
{
FileFd file(_config->FindFile("Dir::Cache::pkgcache"), FileFd::ReadOnly);
if (file.IsOpen() == false || file.Failed())
return false;
Map = new MMap(file, MMap::Public|MMap::ReadOnly);
Cache = new pkgCache(Map);
return _error->PendingError() == false;
}
if (WithLock == true)
if (_system->Lock() == false)
return false;
if (_error->PendingError() == true)
return false;
BuildSourceList(Progress);
// Read the caches
bool Res = pkgCacheGenerator::MakeStatusCache(*SrcList,Progress,&Map, true);
if (Progress != NULL)
Progress->Done();
if (Res == false)
return _error->Error(_("The package lists or status file could not be parsed or opened."));
/* This sux, remove it someday */
if (_error->PendingError() == true)
_error->Warning(_("You may want to run apt-get update to correct these problems"));
Cache = new pkgCache(Map);
if (_error->PendingError() == true)
return false;
return true;
}
/*}}}*/
// CacheFile::BuildSourceList - Open and build all relevant sources.list/*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgCacheFile::BuildSourceList(OpProgress * /*Progress*/)
{
if (SrcList != NULL)
return true;
SrcList = new pkgSourceList();
if (SrcList->ReadMainList() == false)
return _error->Error(_("The list of sources could not be read."));
return true;
}
/*}}}*/
// CacheFile::BuildPolicy - Open and build all relevant preferences /*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgCacheFile::BuildPolicy(OpProgress * /*Progress*/)
{
if (Policy != NULL)
return true;
Policy = new pkgPolicy(Cache);
if (_error->PendingError() == true)
return false;
if (ReadPinFile(*Policy) == false || ReadPinDir(*Policy) == false)
return false;
return true;
}
/*}}}*/
// CacheFile::BuildDepCache - Open and build the dependency cache /*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgCacheFile::BuildDepCache(OpProgress *Progress)
{
if (DCache != NULL)
return true;
if (BuildPolicy(Progress) == false)
return false;
DCache = new pkgDepCache(Cache,Policy);
if (_error->PendingError() == true)
return false;
return DCache->Init(Progress);
}
/*}}}*/
// CacheFile::Open - Open the cache files, creating if necessary /*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgCacheFile::Open(OpProgress *Progress, bool WithLock)
{
if (BuildCaches(Progress,WithLock) == false)
return false;
if (BuildPolicy(Progress) == false)
return false;
if (BuildDepCache(Progress) == false)
return false;
if (Progress != NULL)
Progress->Done();
if (_error->PendingError() == true)
return false;
return true;
}
/*}}}*/
// CacheFile::RemoveCaches - remove all cache files from disk /*{{{*/
// ---------------------------------------------------------------------
/* */
void pkgCacheFile::RemoveCaches()
{
std::string const pkgcache = _config->FindFile("Dir::cache::pkgcache");
std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
if (pkgcache.empty() == false && RealFileExists(pkgcache) == true)
RemoveFile("RemoveCaches", pkgcache);
if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
RemoveFile("RemoveCaches", srcpkgcache);
if (pkgcache.empty() == false)
{
std::string cachedir = flNotFile(pkgcache);
std::string cachefile = flNotDir(pkgcache);
if (cachedir.empty() != true && cachefile.empty() != true && DirectoryExists(cachedir) == true)
{
cachefile.append(".");
std::vector<std::string> caches = GetListOfFilesInDir(cachedir, false);
for (std::vector<std::string>::const_iterator file = caches.begin(); file != caches.end(); ++file)
{
std::string nuke = flNotDir(*file);
if (strncmp(cachefile.c_str(), nuke.c_str(), cachefile.length()) != 0)
continue;
RemoveFile("RemoveCaches", *file);
}
}
}
if (srcpkgcache.empty() == true)
return;
std::string cachedir = flNotFile(srcpkgcache);
std::string cachefile = flNotDir(srcpkgcache);
if (cachedir.empty() == true || cachefile.empty() == true || DirectoryExists(cachedir) == false)
return;
cachefile.append(".");
std::vector<std::string> caches = GetListOfFilesInDir(cachedir, false);
for (std::vector<std::string>::const_iterator file = caches.begin(); file != caches.end(); ++file)
{
std::string nuke = flNotDir(*file);
if (strncmp(cachefile.c_str(), nuke.c_str(), cachefile.length()) != 0)
continue;
RemoveFile("RemoveCaches", *file);
}
}
/*}}}*/
// CacheFile::Close - close the cache files /*{{{*/
// ---------------------------------------------------------------------
/* */
void pkgCacheFile::Close()
{
if (ExternOwner == false)
{
delete DCache;
delete Cache;
delete Map;
}
else
ExternOwner = false;
delete Policy;
delete SrcList;
_system->UnLock(true);
Map = NULL;
DCache = NULL;
Policy = NULL;
Cache = NULL;
SrcList = NULL;
}
/*}}}*/
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