Adding upstream version 2.7.12.upstream/2.7.12

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 579 insertions, 0 deletions

diff --git a/ftparchive/cachedb.cc b/ftparchive/cachedb.cc
new file mode 100644
index 0000000..7ad2873
--- /dev/null
+++ b/ftparchive/cachedb.cc
@@ -0,0 +1,579 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+/* ######################################################################
+
+   CacheDB
+   
+   Simple uniform interface to a cache database.
+   
+   ##################################################################### */
+									/*}}}*/
+// Include Files							/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/debfile.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/gpgv.h>
+#include <apt-pkg/hashes.h>
+#include <apt-pkg/strutl.h>
+
+#include <cctype>
+#include <cstddef>
+#include <netinet/in.h> // htonl, etc
+#include <strings.h>
+#include <sys/stat.h>
+
+#include "cachedb.h"
+
+#include <apti18n.h>
+									/*}}}*/
+
+CacheDB::CacheDB(std::string const &DB)
+   : Dbp(0), Fd(NULL), DebFile(0)
+{
+   TmpKey[0]='\0';
+   ReadyDB(DB);
+}
+
+CacheDB::~CacheDB()
+{
+   ReadyDB();
+   delete DebFile;
+   CloseFile();
+}
+
+// CacheDB::ReadyDB - Ready the DB2					/*{{{*/
+// ---------------------------------------------------------------------
+/* This opens the DB2 file for caching package information */
+bool CacheDB::ReadyDB(std::string const &DB)
+{
+   int err;
+
+   ReadOnly = _config->FindB("APT::FTPArchive::ReadOnlyDB",false);
+   
+   // Close the old DB
+   if (Dbp != 0) 
+      Dbp->close(Dbp,0);
+   
+   /* Check if the DB was disabled while running and deal with a 
+      corrupted DB */
+   if (DBFailed() == true)
+   {
+      _error->Warning(_("DB was corrupted, file renamed to %s.old"),DBFile.c_str());
+      rename(DBFile.c_str(),(DBFile+".old").c_str());
+   }
+   
+   DBLoaded = false;
+   Dbp = 0;
+   DBFile = std::string();
+   
+   if (DB.empty())
+      return true;
+
+   db_create(&Dbp, NULL, 0);
+   if ((err = Dbp->open(Dbp, NULL, DB.c_str(), NULL, DB_BTREE,
+                        (ReadOnly?DB_RDONLY:DB_CREATE),
+                        0644)) != 0)
+   {
+      if (err == DB_OLD_VERSION)
+      {
+          _error->Warning(_("DB is old, attempting to upgrade %s"),DBFile.c_str());
+	  err = Dbp->upgrade(Dbp, DB.c_str(), 0);
+	  if (!err)
+	     err = Dbp->open(Dbp, NULL, DB.c_str(), NULL, DB_HASH,
+                            (ReadOnly?DB_RDONLY:DB_CREATE), 0644);
+
+      }
+      // the database format has changed from DB_HASH to DB_BTREE in 
+      // apt 0.6.44
+      if (err == EINVAL)
+      {
+	 _error->Error(_("DB format is invalid. If you upgraded from an older version of apt, please remove and re-create the database."));
+      }
+      if (err)
+      {
+          Dbp = 0;
+          return _error->Error(_("Unable to open DB file %s: %s"),DB.c_str(), db_strerror(err));
+      }
+   }
+
+   DBFile = DB;
+   DBLoaded = true;
+   return true;
+}
+									/*}}}*/
+// CacheDB::OpenFile - Open the file					/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool CacheDB::OpenFile()
+{
+   // always close existing file first
+   CloseFile();
+
+   // open a new file
+   Fd = new FileFd(FileName,FileFd::ReadOnly);
+   if (_error->PendingError() == true)
+   {
+      CloseFile();
+      return false;
+   }
+   return true;
+}
+									/*}}}*/
+// CacheDB::CloseFile - Close the file					/*{{{*/
+void CacheDB::CloseFile()
+{
+   if(Fd != NULL)
+   {
+      delete Fd;
+      Fd = NULL;
+   }
+}
+									/*}}}*/
+// CacheDB::OpenDebFile - Open a debfile				/*{{{*/
+bool CacheDB::OpenDebFile()
+{
+   // always close existing file first
+   CloseDebFile();
+
+   // first open the fd, then pass it to the debDebFile
+   if(OpenFile() == false)
+      return false;
+   DebFile = new debDebFile(*Fd);
+   if (_error->PendingError() == true)
+      return false;
+   return true;
+}
+									/*}}}*/
+// CacheDB::CloseDebFile - Close a debfile again 			/*{{{*/
+void CacheDB::CloseDebFile()
+{
+   CloseFile();
+
+   if(DebFile != NULL)
+   {
+      delete DebFile;
+      DebFile = NULL;
+   }
+}
+									/*}}}*/
+// CacheDB::GetFileStat - Get stats from the file 			/*{{{*/
+// ---------------------------------------------------------------------
+/* This gets the size from the database if it's there.  If we need
+ * to look at the file, also get the mtime from the file. */
+bool CacheDB::GetFileStat(bool const &doStat)
+{
+   if ((CurStat.Flags & FlSize) == FlSize && doStat == false)
+      return true;
+
+   /* Get it from the file. */
+   if (OpenFile() == false)
+      return false;
+   
+   // Stat the file
+   struct stat St;
+   if (fstat(Fd->Fd(),&St) != 0)
+   {
+      CloseFile();
+      return _error->Errno("fstat",
+                           _("Failed to stat %s"),FileName.c_str());
+   }
+   CurStat.FileSize = St.st_size;
+   CurStat.mtime = htonl(St.st_mtime);
+   CurStat.Flags |= FlSize;
+   
+   return true;
+}
+									/*}}}*/
+// CacheDB::GetCurStatCompatOldFormat           			/*{{{*/
+// ---------------------------------------------------------------------
+/* Read the old (32bit FileSize) StateStore format from disk */
+bool CacheDB::GetCurStatCompatOldFormat()
+{
+   InitQueryStats();
+   Data.data = &CurStatOldFormat;
+   Data.flags = DB_DBT_USERMEM;
+   Data.ulen = sizeof(CurStatOldFormat);
+   if (Get() == false)
+   {
+      CurStat.Flags = 0;
+   } else {
+      CurStat.Flags = CurStatOldFormat.Flags;
+      CurStat.mtime = CurStatOldFormat.mtime;
+      CurStat.FileSize = CurStatOldFormat.FileSize;
+      memcpy(CurStat.MD5, CurStatOldFormat.MD5, sizeof(CurStat.MD5));
+      memcpy(CurStat.SHA1, CurStatOldFormat.SHA1, sizeof(CurStat.SHA1));
+      memcpy(CurStat.SHA256, CurStatOldFormat.SHA256, sizeof(CurStat.SHA256));
+   }
+   return true;
+}
+									/*}}}*/
+// CacheDB::GetCurStatCompatOldFormat           			/*{{{*/
+// ---------------------------------------------------------------------
+/* Read the new (64bit FileSize) StateStore format from disk */
+bool CacheDB::GetCurStatCompatNewFormat()
+{
+   InitQueryStats();
+   Data.data = &CurStat;
+   Data.flags = DB_DBT_USERMEM;
+   Data.ulen = sizeof(CurStat);
+   if (Get() == false)
+   {
+      CurStat.Flags = 0;
+   }
+   return true;
+}
+									/*}}}*/
+// CacheDB::GetCurStat - Set the CurStat variable.			/*{{{*/
+// ---------------------------------------------------------------------
+/* Sets the CurStat variable.  Either to 0 if no database is used
+ * or to the value in the database if one is used */
+bool CacheDB::GetCurStat()
+{
+   memset(&CurStat,0,sizeof(CurStat));
+   
+   if (DBLoaded)
+   {
+      // do a first query to just get the size of the data on disk
+      InitQueryStats();
+      Data.data = &CurStat;
+      Data.flags = DB_DBT_USERMEM;
+      Data.ulen = 0;
+      Get();
+
+      if (Data.size == 0)
+      {
+         // nothing needs to be done, we just have not data for this deb
+      }
+      // check if the record is written in the old format (32bit filesize)
+      else if(Data.size == sizeof(CurStatOldFormat))
+      {
+         GetCurStatCompatOldFormat();
+      }
+      else if(Data.size == sizeof(CurStat))
+      {
+         GetCurStatCompatNewFormat();
+      } else {
+         return _error->Error("Cache record size mismatch (%ul)", Data.size);
+      }
+
+      CurStat.Flags = ntohl(CurStat.Flags);
+      CurStat.FileSize = ntohl(CurStat.FileSize);
+   }      
+   return true;
+}
+									/*}}}*/
+// CacheDB::GetFileInfo - Get all the info about the file		/*{{{*/
+// ---------------------------------------------------------------------
+bool CacheDB::GetFileInfo(std::string const &FileName, bool const &DoControl, bool const &DoContents,
+				bool const &GenContentsOnly, bool const DoSource, unsigned int const DoHashes,
+                          bool const &checkMtime)
+{
+   this->FileName = FileName;
+
+   if (GetCurStat() == false)
+      return false;
+   OldStat = CurStat;
+
+   if (GetFileStat(checkMtime) == false)
+      return false;
+
+   /* if mtime changed, update CurStat from disk */
+   if (checkMtime == true && OldStat.mtime != CurStat.mtime)
+      CurStat.Flags = FlSize;
+
+   Stats.Bytes += CurStat.FileSize;
+   ++Stats.Packages;
+
+   if ((DoControl && LoadControl() == false)
+	 || (DoContents && LoadContents(GenContentsOnly) == false)
+	 || (DoSource && LoadSource() == false)
+	 || (DoHashes != 0 && GetHashes(false, DoHashes) == false)
+      )
+   {
+      return false;
+   }
+
+   return true;
+}
+									/*}}}*/
+bool CacheDB::LoadSource()						/*{{{*/
+{
+   // Try to read the control information out of the DB.
+   if ((CurStat.Flags & FlSource) == FlSource)
+   {
+      // Lookup the control information
+      InitQuerySource();
+      if (Get() == true && Dsc.TakeDsc(Data.data, Data.size) == true)
+      {
+	    return true;
+      }
+      CurStat.Flags &= ~FlSource;
+   }
+   if (OpenFile() == false)
+      return false;
+
+   Stats.Misses++;
+   if (Dsc.Read(FileName) == false)
+      return false;
+
+   if (Dsc.Length == 0)
+      return _error->Error(_("Failed to read .dsc"));
+
+   // Write back the control information
+   InitQuerySource();
+   if (Put(Dsc.Data.c_str(), Dsc.Length) == true)
+      CurStat.Flags |= FlSource;
+
+   return true;
+}
+									/*}}}*/
+// CacheDB::LoadControl - Load Control information			/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool CacheDB::LoadControl()
+{
+   // Try to read the control information out of the DB.
+   if ((CurStat.Flags & FlControl) == FlControl)
+   {
+      // Lookup the control information
+      InitQueryControl();
+      if (Get() == true && Control.TakeControl(Data.data,Data.size) == true)
+	    return true;
+      CurStat.Flags &= ~FlControl;
+   }
+   
+   if(OpenDebFile() == false)
+      return false;
+   
+   Stats.Misses++;
+   if (Control.Read(*DebFile) == false)
+      return false;
+
+   if (Control.Control == 0)
+      return _error->Error(_("Archive has no control record"));
+   
+   // Write back the control information
+   InitQueryControl();
+   if (Put(Control.Control,Control.Length) == true)
+      CurStat.Flags |= FlControl;
+   return true;
+}
+									/*}}}*/
+// CacheDB::LoadContents - Load the File Listing			/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool CacheDB::LoadContents(bool const &GenOnly)
+{
+   // Try to read the control information out of the DB.
+   if ((CurStat.Flags & FlContents) == FlContents)
+   {
+      if (GenOnly == true)
+	 return true;
+      
+      // Lookup the contents information
+      InitQueryContent();
+      if (Get() == true)
+      {
+	 if (Contents.TakeContents(Data.data,Data.size) == true)
+	    return true;
+      }
+      
+      CurStat.Flags &= ~FlContents;
+   }
+   
+   if(OpenDebFile() == false)
+      return false;
+
+   Stats.Misses++;
+   if (Contents.Read(*DebFile) == false)
+      return false;	    
+   
+   // Write back the control information
+   InitQueryContent();
+   if (Put(Contents.Data,Contents.CurSize) == true)
+      CurStat.Flags |= FlContents;
+   return true;
+}
+									/*}}}*/
+// CacheDB::GetHashes - Get the hashes					/*{{{*/
+static std::string bytes2hex(uint8_t *bytes, size_t length) {
+   char buf[3];
+   std::string space;
+
+   space.reserve(length*2 + 1);
+   for (size_t i = 0; i < length; i++) {
+      snprintf(buf, sizeof(buf), "%02x", bytes[i]);
+      space.append(buf);
+   }
+   return space;
+}
+
+static inline unsigned char xdig2num(char const &dig) {
+   if (isdigit(dig)) return dig - '0';
+   if ('a' <= dig && dig <= 'f') return dig - 'a' + 10;
+   if ('A' <= dig && dig <= 'F') return dig - 'A' + 10;
+   return 0;
+}
+
+static void hex2bytes(uint8_t *bytes, const char *hex, int length) {
+   while (length-- > 0) {
+      *bytes = 0;
+      if (isxdigit(hex[0]) && isxdigit(hex[1])) {
+	  *bytes = xdig2num(hex[0]) * 16 + xdig2num(hex[1]);
+	  hex += 2;
+      }
+      bytes++;
+   } 
+}
+bool CacheDB::GetHashes(bool const GenOnly, unsigned int const DoHashes)
+{
+   unsigned int notCachedHashes = 0;
+   if ((CurStat.Flags & FlMD5) != FlMD5)
+   {
+      notCachedHashes = notCachedHashes | Hashes::MD5SUM;
+   }
+   if ((CurStat.Flags & FlSHA1) != FlSHA1)
+   {
+      notCachedHashes = notCachedHashes | Hashes::SHA1SUM;
+   }
+   if ((CurStat.Flags & FlSHA256) != FlSHA256)
+   {
+      notCachedHashes = notCachedHashes | Hashes::SHA256SUM;
+   }
+   if ((CurStat.Flags & FlSHA512) != FlSHA512)
+   {
+      notCachedHashes = notCachedHashes | Hashes::SHA512SUM;
+   }
+   unsigned int FlHashes = DoHashes & notCachedHashes;
+   HashesList.clear();
+
+   if (FlHashes != 0)
+   {
+      if (OpenFile() == false)
+	 return false;
+
+      Hashes hashes(FlHashes);
+      if (Fd->Seek(0) == false || hashes.AddFD(*Fd, CurStat.FileSize) == false)
+	 return false;
+
+      HashStringList hl = hashes.GetHashStringList();
+      for (HashStringList::const_iterator hs = hl.begin(); hs != hl.end(); ++hs)
+      {
+	 HashesList.push_back(*hs);
+	 if (strcasecmp(hs->HashType().c_str(), "SHA512") == 0)
+	 {
+	    Stats.SHA512Bytes += CurStat.FileSize;
+	    hex2bytes(CurStat.SHA512, hs->HashValue().data(), sizeof(CurStat.SHA512));
+	    CurStat.Flags |= FlSHA512;
+	 }
+	 else if (strcasecmp(hs->HashType().c_str(), "SHA256") == 0)
+	 {
+	    Stats.SHA256Bytes += CurStat.FileSize;
+	    hex2bytes(CurStat.SHA256, hs->HashValue().data(), sizeof(CurStat.SHA256));
+	    CurStat.Flags |= FlSHA256;
+	 }
+	 else if (strcasecmp(hs->HashType().c_str(), "SHA1") == 0)
+	 {
+	    Stats.SHA1Bytes += CurStat.FileSize;
+	    hex2bytes(CurStat.SHA1, hs->HashValue().data(), sizeof(CurStat.SHA1));
+	    CurStat.Flags |= FlSHA1;
+	 }
+	 else if (strcasecmp(hs->HashType().c_str(), "MD5Sum") == 0)
+	 {
+	    Stats.MD5Bytes += CurStat.FileSize;
+	    hex2bytes(CurStat.MD5, hs->HashValue().data(), sizeof(CurStat.MD5));
+	    CurStat.Flags |= FlMD5;
+	 }
+	 else if (strcasecmp(hs->HashType().c_str(), "Checksum-FileSize") == 0)
+	 {
+	    // we store it in a different field already
+	 }
+	 else
+	    return _error->Error("Got unknown unrequested hashtype %s", hs->HashType().c_str());
+      }
+   }
+   if (GenOnly == true)
+      return true;
+
+   bool ret = true;
+#define PUSH_BACK_HASH(FLAG, TYPE, VALUE) \
+   if ((CurStat.Flags & FLAG) == FLAG) \
+      ret &= HashesList.push_back(HashString(TYPE, bytes2hex(VALUE, sizeof(VALUE))));
+   PUSH_BACK_HASH(FlMD5, "MD5Sum", CurStat.MD5);
+   PUSH_BACK_HASH(FlSHA1, "SHA1", CurStat.SHA1);
+   PUSH_BACK_HASH(FlSHA256, "SHA256", CurStat.SHA256);
+   PUSH_BACK_HASH(FlSHA512, "SHA512", CurStat.SHA512);
+   return ret;
+}
+									/*}}}*/
+// CacheDB::Finish - Write back the cache structure			/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool CacheDB::Finish()
+{
+   // Optimize away some writes.
+   if (CurStat.Flags == OldStat.Flags &&
+       CurStat.mtime == OldStat.mtime)
+      return true;
+
+   // Write the stat information
+   CurStat.Flags = htonl(CurStat.Flags);
+   CurStat.FileSize = htonl(CurStat.FileSize);
+   InitQueryStats();
+   Put(&CurStat,sizeof(CurStat));
+   CurStat.Flags = ntohl(CurStat.Flags);
+   CurStat.FileSize = ntohl(CurStat.FileSize);
+
+   return true;
+}
+									/*}}}*/
+// CacheDB::Clean - Clean the Database					/*{{{*/
+// ---------------------------------------------------------------------
+/* Tidy the database by removing files that no longer exist at all. */
+bool CacheDB::Clean()
+{
+   if (DBLoaded == false)
+      return true;
+
+   /* I'm not sure what VERSION_MINOR should be here.. 2.4.14 certainly
+      needs the lower one and 2.7.7 needs the upper.. */
+   DBC *Cursor;
+   if ((errno = Dbp->cursor(Dbp, NULL, &Cursor, 0)) != 0)
+      return _error->Error(_("Unable to get a cursor"));
+   
+   DBT Key;
+   DBT Data;
+   memset(&Key,0,sizeof(Key));
+   memset(&Data,0,sizeof(Data));
+   while ((errno = Cursor->c_get(Cursor,&Key,&Data,DB_NEXT)) == 0)
+   {
+      const char *Colon = (char*)memrchr(Key.data, ':', Key.size);
+      if (Colon)
+      {
+         if (stringcmp(Colon + 1, (char *)Key.data+Key.size,"st") == 0 ||
+             stringcmp(Colon + 1, (char *)Key.data+Key.size,"cl") == 0 ||
+             stringcmp(Colon + 1, (char *)Key.data+Key.size,"cs") == 0 ||
+             stringcmp(Colon + 1, (char *)Key.data+Key.size,"cn") == 0)
+	 {
+            std::string FileName = std::string((const char *)Key.data,Colon);
+            if (FileExists(FileName) == true) {
+		continue;
+            }
+	 }
+      }
+      Cursor->c_del(Cursor,0);
+   }
+   int res = Dbp->compact(Dbp, NULL, NULL, NULL, NULL, DB_FREE_SPACE, NULL);
+   if (res < 0)
+      _error->Warning("compact failed with result %i", res);
+
+   if(_config->FindB("Debug::APT::FTPArchive::Clean", false) == true)
+      Dbp->stat_print(Dbp, 0);
+
+
+   return true;
+}
+									/*}}}*/