support setting empty values (sanely) & removing support for

[apt.git] / apt-pkg / cachefile.cc

diff --git a/apt-pkg/cachefile.cc b/apt-pkg/cachefile.cc
index 1b8d91a44951b31c37c1d9fcb112c8c77af437b9..aaa2436c5d787fcf4bcad623b1f93afc37efb963 100644 (file)
--- a/apt-pkg/cachefile.cc
+++ b/apt-pkg/cachefile.cc
@@ -21,17 +21,27 @@
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/policy.h>
 #include <apt-pkg/pkgsystem.h>
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/policy.h>
 #include <apt-pkg/pkgsystem.h>

-#include <apt-pkg/acquire-item.h>

 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/progress.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                                  /*{{{*/
 
 #include <apti18n.h>
                                                                        /*}}}*/
 // CacheFile::CacheFile - Constructor                                  /*{{{*/

-// ---------------------------------------------------------------------
-/* */
-pkgCacheFile::pkgCacheFile() : Map(NULL), Cache(NULL), DCache(NULL),
-                               SrcList(NULL), Policy(NULL)
+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)

 {
 }
                                                                        /*}}}*/
 {
 }
                                                                        /*}}}*/


@@ -40,54 +50,58 @@ pkgCacheFile::pkgCacheFile() : Map(NULL), Cache(NULL), DCache(NULL),
 /* */
 pkgCacheFile::~pkgCacheFile()
 {
 /* */
 pkgCacheFile::~pkgCacheFile()
 {

-   delete DCache;
+   if (ExternOwner == false)
+   {
+      delete DCache;
+      delete Cache;
+      delete Map;
+   }

    delete Policy;
    delete SrcList;
    delete Policy;
    delete SrcList;

-   delete Cache;
-   delete Map;
-   _system->UnLock(true);
+   if (ExternOwner == false)
+      _system->UnLock(true);

 }
                                                                        /*}}}*/
 // CacheFile::BuildCaches - Open and build the cache files             /*{{{*/
 }
                                                                        /*}}}*/
 // 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;
 
 bool pkgCacheFile::BuildCaches(OpProgress *Progress, bool WithLock)
 {
    if (Cache != NULL)
       return true;
 

+   ScopedErrorMerge sem;

    if (_config->FindB("pkgCacheFile::Generate", true) == false)
    {
    if (_config->FindB("pkgCacheFile::Generate", true) == false)
    {

-      Map = new MMap(*new FileFd(_config->FindFile("Dir::Cache::pkgcache"),
-                    FileFd::ReadOnly),MMap::Public|MMap::ReadOnly);
+      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);
       Cache = new pkgCache(Map);

-      if (_error->PendingError() == true)
-         return false;
-      return true;
+      return _error->PendingError() == false;

    }
 
    }
 

-   const bool ErrorWasEmpty = _error->empty();

    if (WithLock == true)
       if (_system->Lock() == false)
         return false;
    if (WithLock == true)
       if (_system->Lock() == false)
         return false;

-   
-   if (_config->FindB("Debug::NoLocking",false) == true)
-      WithLock = false;
-      
+

    if (_error->PendingError() == true)
       return false;
 
    BuildSourceList(Progress);
 
    // Read the caches
    if (_error->PendingError() == true)
       return false;
 
    BuildSourceList(Progress);
 
    // Read the caches

-   bool Res = pkgCacheGenerator::MakeStatusCache(*SrcList,Progress,&Map,!WithLock);
+   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 (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 (ErrorWasEmpty == true && _error->empty() == false)
+   if (_error->PendingError() == true)

       _error->Warning(_("You may want to run apt-get update to correct these problems"));
 
    Cache = new pkgCache(Map);
       _error->Warning(_("You may want to run apt-get update to correct these problems"));
 
    Cache = new pkgCache(Map);


@@ -99,7 +113,7 @@ bool pkgCacheFile::BuildCaches(OpProgress *Progress, bool WithLock)
 // CacheFile::BuildSourceList - Open and build all relevant sources.list/*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // CacheFile::BuildSourceList - Open and build all relevant sources.list/*{{{*/
 // ---------------------------------------------------------------------
 /* */

-bool pkgCacheFile::BuildSourceList(OpProgress *Progress)
+bool pkgCacheFile::BuildSourceList(OpProgress * /*Progress*/)

 {
    if (SrcList != NULL)
       return true;
 {
    if (SrcList != NULL)
       return true;


@@ -113,7 +127,7 @@ bool pkgCacheFile::BuildSourceList(OpProgress *Progress)
 // CacheFile::BuildPolicy - Open and build all relevant preferences    /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // CacheFile::BuildPolicy - Open and build all relevant preferences    /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-bool pkgCacheFile::BuildPolicy(OpProgress *Progress)
+bool pkgCacheFile::BuildPolicy(OpProgress * /*Progress*/)

 {
    if (Policy != NULL)
       return true;
 {
    if (Policy != NULL)
       return true;


@@ -136,12 +150,14 @@ bool pkgCacheFile::BuildDepCache(OpProgress *Progress)
    if (DCache != NULL)
       return true;
 
    if (DCache != NULL)
       return true;
 

+   if (BuildPolicy(Progress) == false)
+      return false;
+

    DCache = new pkgDepCache(Cache,Policy);
    if (_error->PendingError() == true)
       return false;
 
    DCache = new pkgDepCache(Cache,Policy);
    if (_error->PendingError() == true)
       return false;
 

-   DCache->Init(Progress);
-   return true;
+   return DCache->Init(Progress);

 }
                                                                        /*}}}*/
 // CacheFile::Open - Open the cache files, creating if necessary       /*{{{*/
 }
                                                                        /*}}}*/
 // CacheFile::Open - Open the cache files, creating if necessary       /*{{{*/


@@ -175,9 +191,43 @@ void pkgCacheFile::RemoveCaches()
    std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
 
    if (pkgcache.empty() == false && RealFileExists(pkgcache) == true)
    std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
 
    if (pkgcache.empty() == false && RealFileExists(pkgcache) == true)

-      unlink(pkgcache.c_str());
+      RemoveFile("RemoveCaches", pkgcache);

    if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
    if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)

-      unlink(srcpkgcache.c_str());
+      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                            /*{{{*/
 }
                                                                        /*}}}*/
 // CacheFile::Close - close the cache files                            /*{{{*/


@@ -185,11 +235,16 @@ void pkgCacheFile::RemoveCaches()
 /* */
 void pkgCacheFile::Close()
 {
 /* */
 void pkgCacheFile::Close()
 {

-   delete DCache;
+   if (ExternOwner == false)
+   {
+      delete DCache;
+      delete Cache;
+      delete Map;
+   }
+   else
+      ExternOwner = false;

    delete Policy;
    delete Policy;

-   delete Cache;

    delete SrcList;
    delete SrcList;

-   delete Map;

    _system->UnLock(true);
 
    Map = NULL;
    _system->UnLock(true);
 
    Map = NULL;