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-rw-r--r--apt-pkg/cachefile.cc96
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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;
+}
+ /*}}}*/