[apt.git] / ftparchive / cachedb.cc

// -*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
// $Id: cachedb.cc,v 1.7 2004/05/08 19:41:01 mdz Exp $
/* ######################################################################

   CacheDB
   
   Simple uniform interface to a cache database.
   
   ##################################################################### */
									/*}}}*/
// Include Files							/*{{{*/
#include <config.h>

#include <apt-pkg/error.h>
#include <apt-pkg/md5.h>
#include <apt-pkg/sha1.h>
#include <apt-pkg/sha2.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/debfile.h>
#include <apt-pkg/gpgv.h>

#include <netinet/in.h>       // htonl, etc
#include <ctype.h>
#include <stddef.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;
};

// 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,
                          bool const &DoMD5, bool const &DoSHA1,
                          bool const &DoSHA256, bool const &DoSHA512, 
                          bool const &checkMtime)
{
   bool result = true;
   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)
       || (DoMD5 && GetMD5(false) == false)
       || (DoSHA1 && GetSHA1(false) == false)
       || (DoSHA256 && GetSHA256(false) == false)
       || (DoSHA512 && GetSHA512(false) == false) )
   {
      result = false;
   }
    
   return result;
}
									/*}}}*/

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.Data == 0)
      return _error->Error(_("Failed to read .dsc"));
   
   // Write back the control information
   InitQuerySource();
   if (Put(Dsc.Data, 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;
}
									/*}}}*/

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++;
   } 
}

// CacheDB::GetMD5 - Get the MD5 hash					/*{{{*/
// ---------------------------------------------------------------------
/* */
bool CacheDB::GetMD5(bool const &GenOnly)
{
   // Try to read the control information out of the DB.
   if ((CurStat.Flags & FlMD5) == FlMD5)
   {
      if (GenOnly == true)
	 return true;
      
      MD5Res = bytes2hex(CurStat.MD5, sizeof(CurStat.MD5));
	 return true;
   }
   
   Stats.MD5Bytes += CurStat.FileSize;
	 
   if (OpenFile() == false)
      return false;

   MD5Summation MD5;
   if (Fd->Seek(0) == false || MD5.AddFD(*Fd, CurStat.FileSize) == false)
      return false;
   
   MD5Res = MD5.Result();
   hex2bytes(CurStat.MD5, MD5Res.data(), sizeof(CurStat.MD5));
      CurStat.Flags |= FlMD5;
   return true;
}
									/*}}}*/
// CacheDB::GetSHA1 - Get the SHA1 hash					/*{{{*/
// ---------------------------------------------------------------------
/* */
bool CacheDB::GetSHA1(bool const &GenOnly)
{
   // Try to read the control information out of the DB.
   if ((CurStat.Flags & FlSHA1) == FlSHA1)
   {
      if (GenOnly == true)
	 return true;

      SHA1Res = bytes2hex(CurStat.SHA1, sizeof(CurStat.SHA1));
      return true;
   }
   
   Stats.SHA1Bytes += CurStat.FileSize;
	 
   if (OpenFile() == false)
      return false;

   SHA1Summation SHA1;
   if (Fd->Seek(0) == false || SHA1.AddFD(*Fd, CurStat.FileSize) == false)
      return false;
   
   SHA1Res = SHA1.Result();
   hex2bytes(CurStat.SHA1, SHA1Res.data(), sizeof(CurStat.SHA1));
   CurStat.Flags |= FlSHA1;
   return true;
}
									/*}}}*/
// CacheDB::GetSHA256 - Get the SHA256 hash				/*{{{*/
// ---------------------------------------------------------------------
/* */
bool CacheDB::GetSHA256(bool const &GenOnly)
{
   // Try to read the control information out of the DB.
   if ((CurStat.Flags & FlSHA256) == FlSHA256)
   {
      if (GenOnly == true)
	 return true;

      SHA256Res = bytes2hex(CurStat.SHA256, sizeof(CurStat.SHA256));
      return true;
   }
   
   Stats.SHA256Bytes += CurStat.FileSize;
	 
   if (OpenFile() == false)
      return false;

   SHA256Summation SHA256;
   if (Fd->Seek(0) == false || SHA256.AddFD(*Fd, CurStat.FileSize) == false)
      return false;
   
   SHA256Res = SHA256.Result();
   hex2bytes(CurStat.SHA256, SHA256Res.data(), sizeof(CurStat.SHA256));
   CurStat.Flags |= FlSHA256;
   return true;
}
									/*}}}*/
// CacheDB::GetSHA256 - Get the SHA256 hash				/*{{{*/
// ---------------------------------------------------------------------
/* */
bool CacheDB::GetSHA512(bool const &GenOnly)
{
   // Try to read the control information out of the DB.
   if ((CurStat.Flags & FlSHA512) == FlSHA512)
   {
      if (GenOnly == true)
	 return true;

      SHA512Res = bytes2hex(CurStat.SHA512, sizeof(CurStat.SHA512));
      return true;
   }
   
   Stats.SHA512Bytes += CurStat.FileSize;
	 
   if (OpenFile() == false)
      return false;

   SHA512Summation SHA512;
   if (Fd->Seek(0) == false || SHA512.AddFD(*Fd, CurStat.FileSize) == false)
      return false;
   
   SHA512Res = SHA512.Result();
   hex2bytes(CurStat.SHA512, SHA512Res.data(), sizeof(CurStat.SHA512));
   CurStat.Flags |= FlSHA512;
   return true;
}
									/*}}}*/
// 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;
}
									/*}}}*/
Commit	Line	Data
b2e465d6 AL	1	// -- mode: cpp; mode: fold --
b2e465d6 AL	2	// Description /{{{/
c9569a1e	3	// $Id: cachedb.cc,v 1.7 2004/05/08 19:41:01 mdz Exp $
b2e465d6 AL	4	/* ######################################################################
	5
	6	CacheDB
	7
	8	Simple uniform interface to a cache database.
	9
	10	##################################################################### */
	11	/}}}/
	12	// Include Files /{{{/
ea542140	13	#include <config.h>
b2e465d6 AL	14
	15	#include <apt-pkg/error.h>
	16	#include <apt-pkg/md5.h>
cde41ae8	17	#include <apt-pkg/sha1.h>
84a0890e	18	#include <apt-pkg/sha2.h>
b2e465d6 AL	19	#include <apt-pkg/strutl.h>
b2e465d6 AL	20	#include <apt-pkg/configuration.h>
472ff00e	21	#include <apt-pkg/fileutl.h>
453b82a3	22	#include <apt-pkg/debfile.h>
ce928105	23	#include <apt-pkg/gpgv.h>
a00a9b44	24
b2e465d6	25	#include <netinet/in.h> // htonl, etc
453b82a3 DK	26	#include <ctype.h>
	27	#include <stddef.h>
	28	#include <sys/stat.h>
ea542140	29
ea542140	30	#include "cachedb.h"
a00a9b44 DK	31
a00a9b44 DK	32	#include <apti18n.h>
b2e465d6 AL	33	/}}}/
b2e465d6 AL	34
21ea1dbb MV	35	CacheDB::CacheDB(std::string const &DB)
	36	: Dbp(0), Fd(NULL), DebFile(0)
	37	{
	38	TmpKey[0]='\0';
	39	ReadyDB(DB);
	40	};
	41
	42	CacheDB::~CacheDB()
	43	{
	44	ReadyDB();
	45	delete DebFile;
	46	};
	47
b2e465d6 AL	48	// CacheDB::ReadyDB - Ready the DB2 /{{{/
	49	// ---------------------------------------------------------------------
	50	/* This opens the DB2 file for caching package information */
8f3ba4e8	51	bool CacheDB::ReadyDB(std::string const &DB)
b2e465d6	52	{
c9569a1e AL	53	int err;
c9569a1e AL	54
b2e465d6 AL	55	ReadOnly = _config->FindB("APT::FTPArchive::ReadOnlyDB",false);
	56
	57	// Close the old DB
	58	if (Dbp != 0)
	59	Dbp->close(Dbp,0);
	60
	61	/* Check if the DB was disabled while running and deal with a
	62	corrupted DB */
	63	if (DBFailed() == true)
	64	{
dc738e7a	65	_error->Warning(_("DB was corrupted, file renamed to %s.old"),DBFile.c_str());
b2e465d6 AL	66	rename(DBFile.c_str(),(DBFile+".old").c_str());
	67	}
	68
	69	DBLoaded = false;
	70	Dbp = 0;
8f3ba4e8	71	DBFile = std::string();
b2e465d6 AL	72
	73	if (DB.empty())
	74	return true;
c9569a1e AL	75
c9569a1e AL	76	db_create(&Dbp, NULL, 0);
cde41ae8	77	if ((err = Dbp->open(Dbp, NULL, DB.c_str(), NULL, DB_BTREE,
b2e465d6	78	(ReadOnly?DB_RDONLY:DB_CREATE),
c9569a1e	79	0644)) != 0)
b2e465d6	80	{
c9569a1e AL	81	if (err == DB_OLD_VERSION)
	82	{
	83	_error->Warning(_("DB is old, attempting to upgrade %s"),DBFile.c_str());
	84	err = Dbp->upgrade(Dbp, DB.c_str(), 0);
	85	if (!err)
	86	err = Dbp->open(Dbp, NULL, DB.c_str(), NULL, DB_HASH,
	87	(ReadOnly?DB_RDONLY:DB_CREATE), 0644);
	88
	89	}
eb2bc4f2 MV	90	// the database format has changed from DB_HASH to DB_BTREE in
	91	// apt 0.6.44
	92	if (err == EINVAL)
	93	{
c6474fb6	94	_error->Error(_("DB format is invalid. If you upgraded from an older version of apt, please remove and re-create the database."));
eb2bc4f2	95	}
c9569a1e AL	96	if (err)
	97	{
	98	Dbp = 0;
	99	return _error->Error(_("Unable to open DB file %s: %s"),DB.c_str(), db_strerror(err));
	100	}
b2e465d6	101	}
243b2a38	102
b2e465d6 AL	103	DBFile = DB;
	104	DBLoaded = true;
	105	return true;
	106	}
	107	/}}}/
c6474fb6	108	// CacheDB::OpenFile - Open the file /{{{/
b2e465d6	109	// ---------------------------------------------------------------------
cde41ae8 MV	110	/* */
	111	bool CacheDB::OpenFile()
	112	{
acea28d0 MV	113	// always close existing file first
acea28d0 MV	114	CloseFile();
215b0faf MV	115
	116	// open a new file
	117	Fd = new FileFd(FileName,FileFd::ReadOnly);
	118	if (_error->PendingError() == true)
	119	{
	120	CloseFile();
	121	return false;
	122	}
	123	return true;
cde41ae8 MV	124	}
cde41ae8 MV	125	/}}}/
215b0faf	126	// CacheDB::CloseFile - Close the file /{{{/
ce928105 MV	127	void CacheDB::CloseFile()
ce928105 MV	128	{
215b0faf MV	129	if(Fd != NULL)
	130	{
	131	delete Fd;
	132	Fd = NULL;
	133	}
ce928105	134	}
215b0faf MV	135	/}}}/
215b0faf MV	136	// CacheDB::OpenDebFile - Open a debfile /{{{/
ce928105 MV	137	bool CacheDB::OpenDebFile()
ce928105 MV	138	{
acea28d0 MV	139	// always close existing file first
acea28d0 MV	140	CloseDebFile();
215b0faf MV	141
	142	// first open the fd, then pass it to the debDebFile
	143	if(OpenFile() == false)
	144	return false;
ce928105 MV	145	DebFile = new debDebFile(*Fd);
	146	if (_error->PendingError() == true)
	147	return false;
	148	return true;
	149	}
215b0faf MV	150	/}}}/
215b0faf MV	151	// CacheDB::CloseDebFile - Close a debfile again /{{{/
ce928105 MV	152	void CacheDB::CloseDebFile()
ce928105 MV	153	{
215b0faf	154	CloseFile();
ce928105	155
215b0faf MV	156	if(DebFile != NULL)
	157	{
	158	delete DebFile;
	159	DebFile = NULL;
	160	}
	161	}
	162	/}}}/
cde41ae8 MV	163	// CacheDB::GetFileStat - Get stats from the file /{{{/
	164	// ---------------------------------------------------------------------
	165	/* This gets the size from the database if it's there. If we need
	166	* to look at the file, also get the mtime from the file. */
ff574e76	167	bool CacheDB::GetFileStat(bool const &doStat)
cde41ae8	168	{
215b0faf MV	169	if ((CurStat.Flags & FlSize) == FlSize && doStat == false)
	170	return true;
	171
	172	/* Get it from the file. */
	173	if (OpenFile() == false)
	174	return false;
	175
	176	// Stat the file
	177	struct stat St;
	178	if (fstat(Fd->Fd(),&St) != 0)
	179	{
	180	CloseFile();
	181	return _error->Errno("fstat",
	182	_("Failed to stat %s"),FileName.c_str());
	183	}
	184	CurStat.FileSize = St.st_size;
	185	CurStat.mtime = htonl(St.st_mtime);
	186	CurStat.Flags \|= FlSize;
	187
243b2a38 MV	188	return true;
	189	}
	190	/}}}/
	191	// CacheDB::GetCurStatCompatOldFormat /{{{/
	192	// ---------------------------------------------------------------------
	193	/* Read the old (32bit FileSize) StateStore format from disk */
	194	bool CacheDB::GetCurStatCompatOldFormat()
	195	{
	196	InitQueryStats();
	197	Data.data = &CurStatOldFormat;
	198	Data.flags = DB_DBT_USERMEM;
	199	Data.ulen = sizeof(CurStatOldFormat);
	200	if (Get() == false)
	201	{
	202	CurStat.Flags = 0;
	203	} else {
	204	CurStat.Flags = CurStatOldFormat.Flags;
	205	CurStat.mtime = CurStatOldFormat.mtime;
	206	CurStat.FileSize = CurStatOldFormat.FileSize;
	207	memcpy(CurStat.MD5, CurStatOldFormat.MD5, sizeof(CurStat.MD5));
	208	memcpy(CurStat.SHA1, CurStatOldFormat.SHA1, sizeof(CurStat.SHA1));
	209	memcpy(CurStat.SHA256, CurStatOldFormat.SHA256, sizeof(CurStat.SHA256));
	210	}
	211	return true;
	212	}
	213	/}}}/
	214	// CacheDB::GetCurStatCompatOldFormat /{{{/
	215	// ---------------------------------------------------------------------
	216	/* Read the new (64bit FileSize) StateStore format from disk */
	217	bool CacheDB::GetCurStatCompatNewFormat()
	218	{
	219	InitQueryStats();
	220	Data.data = &CurStat;
	221	Data.flags = DB_DBT_USERMEM;
	222	Data.ulen = sizeof(CurStat);
	223	if (Get() == false)
	224	{
	225	CurStat.Flags = 0;
	226	}
215b0faf	227	return true;
cde41ae8 MV	228	}
	229	/}}}/
	230	// CacheDB::GetCurStat - Set the CurStat variable. /{{{/
	231	// ---------------------------------------------------------------------
	232	/* Sets the CurStat variable. Either to 0 if no database is used
	233	* or to the value in the database if one is used */
	234	bool CacheDB::GetCurStat()
b2e465d6	235	{
b2e465d6 AL	236	memset(&CurStat,0,sizeof(CurStat));
b2e465d6 AL	237
215b0faf MV	238	if (DBLoaded)
215b0faf MV	239	{
243b2a38	240	// do a first query to just get the size of the data on disk
37497bd5	241	InitQueryStats();
215b0faf	242	Data.data = &CurStat;
215b0faf	243	Data.flags = DB_DBT_USERMEM;
243b2a38 MV	244	Data.ulen = 0;
	245	Get();
	246
	247	if (Data.size == 0)
b2e465d6	248	{
243b2a38 MV	249	// nothing needs to be done, we just have not data for this deb
	250	}
	251	// check if the record is written in the old format (32bit filesize)
	252	else if(Data.size == sizeof(CurStatOldFormat))
	253	{
	254	GetCurStatCompatOldFormat();
	255	}
	256	else if(Data.size == sizeof(CurStat))
	257	{
	258	GetCurStatCompatNewFormat();
	259	} else {
	260	return _error->Error("Cache record size mismatch (%ul)", Data.size);
	261	}
	262
215b0faf MV	263	CurStat.Flags = ntohl(CurStat.Flags);
215b0faf MV	264	CurStat.FileSize = ntohl(CurStat.FileSize);
b2e465d6	265	}
215b0faf	266	return true;
cde41ae8 MV	267	}
	268	/}}}/
	269	// CacheDB::GetFileInfo - Get all the info about the file /{{{/
	270	// ---------------------------------------------------------------------
ce928105 MV	271	bool CacheDB::GetFileInfo(std::string const &FileName, bool const &DoControl,
	272	bool const &DoContents,
	273	bool const &GenContentsOnly,
	274	bool const &DoSource,
	275	bool const &DoMD5, bool const &DoSHA1,
	276	bool const &DoSHA256, bool const &DoSHA512,
9a961efc	277	bool const &checkMtime)
cde41ae8	278	{
ce928105 MV	279	bool result = true;
ce928105 MV	280	this->FileName = FileName;
cde41ae8	281
ce928105	282	if (GetCurStat() == false)
ce928105	283	return false;
b2e465d6	284	OldStat = CurStat;
ff574e76	285
ce928105	286	if (GetFileStat(checkMtime) == false)
ce928105	287	return false;
cde41ae8	288
215b0faf MV	289	/* if mtime changed, update CurStat from disk */
	290	if (checkMtime == true && OldStat.mtime != CurStat.mtime)
	291	CurStat.Flags = FlSize;
	292
	293	Stats.Bytes += CurStat.FileSize;
	294	Stats.Packages++;
	295
	296	if ((DoControl && LoadControl() == false)
	297	\|\| (DoContents && LoadContents(GenContentsOnly) == false)
	298	\|\| (DoSource && LoadSource() == false)
	299	\|\| (DoMD5 && GetMD5(false) == false)
	300	\|\| (DoSHA1 && GetSHA1(false) == false)
	301	\|\| (DoSHA256 && GetSHA256(false) == false)
	302	\|\| (DoSHA512 && GetSHA512(false) == false) )
	303	{
	304	result = false;
	305	}
ce928105	306
215b0faf	307	return result;
ce928105 MV	308	}
	309	/}}}/
	310
	311	bool CacheDB::LoadSource()
	312	{
	313	// Try to read the control information out of the DB.
	314	if ((CurStat.Flags & FlSource) == FlSource)
	315	{
	316	// Lookup the control information
37497bd5	317	InitQuerySource();
ce928105	318	if (Get() == true && Dsc.TakeDsc(Data.data, Data.size) == true)
53ba4e2c	319	{
ce928105	320	return true;
53ba4e2c	321	}
ce928105 MV	322	CurStat.Flags &= ~FlSource;
ce928105 MV	323	}
215b0faf	324	if (OpenFile() == false)
ce928105	325	return false;
ce928105	326
ce928105 MV	327	Stats.Misses++;
	328	if (Dsc.Read(FileName) == false)
	329	return false;
cde41ae8	330
ce928105 MV	331	if (Dsc.Data == 0)
	332	return _error->Error(_("Failed to read .dsc"));
	333
	334	// Write back the control information
37497bd5	335	InitQuerySource();
ce928105 MV	336	if (Put(Dsc.Data, Dsc.Length) == true)
ce928105 MV	337	CurStat.Flags \|= FlSource;
cde41ae8	338
b2e465d6 AL	339	return true;
b2e465d6 AL	340	}
ce928105	341
b2e465d6 AL	342	// CacheDB::LoadControl - Load Control information /{{{/
	343	// ---------------------------------------------------------------------
	344	/* */
	345	bool CacheDB::LoadControl()
	346	{
	347	// Try to read the control information out of the DB.
	348	if ((CurStat.Flags & FlControl) == FlControl)
	349	{
	350	// Lookup the control information
37497bd5	351	InitQueryControl();
b2e465d6 AL	352	if (Get() == true && Control.TakeControl(Data.data,Data.size) == true)
	353	return true;
	354	CurStat.Flags &= ~FlControl;
	355	}
	356
215b0faf	357	if(OpenDebFile() == false)
cde41ae8	358	return false;
b2e465d6 AL	359
	360	Stats.Misses++;
	361	if (Control.Read(*DebFile) == false)
	362	return false;
	363
	364	if (Control.Control == 0)
dc738e7a	365	return _error->Error(_("Archive has no control record"));
b2e465d6 AL	366
b2e465d6 AL	367	// Write back the control information
37497bd5	368	InitQueryControl();
b2e465d6 AL	369	if (Put(Control.Control,Control.Length) == true)
	370	CurStat.Flags \|= FlControl;
	371	return true;
	372	}
	373	/}}}/
	374	// CacheDB::LoadContents - Load the File Listing /{{{/
	375	// ---------------------------------------------------------------------
	376	/* */
9209ec47	377	bool CacheDB::LoadContents(bool const &GenOnly)
b2e465d6 AL	378	{
	379	// Try to read the control information out of the DB.
	380	if ((CurStat.Flags & FlContents) == FlContents)
	381	{
	382	if (GenOnly == true)
	383	return true;
	384
	385	// Lookup the contents information
37497bd5	386	InitQueryContent();
b2e465d6 AL	387	if (Get() == true)
	388	{
	389	if (Contents.TakeContents(Data.data,Data.size) == true)
	390	return true;
	391	}
	392
	393	CurStat.Flags &= ~FlContents;
	394	}
	395
215b0faf	396	if(OpenDebFile() == false)
cde41ae8	397	return false;
b2e465d6	398
0a3b93fc	399	Stats.Misses++;
b2e465d6 AL	400	if (Contents.Read(*DebFile) == false)
	401	return false;
	402
	403	// Write back the control information
37497bd5	404	InitQueryContent();
b2e465d6 AL	405	if (Put(Contents.Data,Contents.CurSize) == true)
	406	CurStat.Flags \|= FlContents;
	407	return true;
	408	}
	409	/}}}/
cde41ae8	410
8f3ba4e8	411	static std::string bytes2hex(uint8_t *bytes, size_t length) {
76ef756a	412	char buf[3];
0fffbc8c	413	std::string space;
76ef756a MV	414
	415	space.reserve(length*2 + 1);
	416	for (size_t i = 0; i < length; i++) {
	417	snprintf(buf, sizeof(buf), "%02x", bytes[i]);
	418	space.append(buf);
	419	}
	420	return space;
cde41ae8 MV	421	}
cde41ae8 MV	422
9209ec47	423	static inline unsigned char xdig2num(char const &dig) {
cde41ae8 MV	424	if (isdigit(dig)) return dig - '0';
	425	if ('a' <= dig && dig <= 'f') return dig - 'a' + 10;
	426	if ('A' <= dig && dig <= 'F') return dig - 'A' + 10;
	427	return 0;
	428	}
	429
	430	static void hex2bytes(uint8_t bytes, const char hex, int length) {
	431	while (length-- > 0) {
	432	*bytes = 0;
	433	if (isxdigit(hex[0]) && isxdigit(hex[1])) {
	434	bytes = xdig2num(hex[0]) 16 + xdig2num(hex[1]);
	435	hex += 2;
	436	}
	437	bytes++;
	438	}
	439	}
	440
b2e465d6 AL	441	// CacheDB::GetMD5 - Get the MD5 hash /{{{/
	442	// ---------------------------------------------------------------------
	443	/* */
9209ec47	444	bool CacheDB::GetMD5(bool const &GenOnly)
b2e465d6 AL	445	{
	446	// Try to read the control information out of the DB.
	447	if ((CurStat.Flags & FlMD5) == FlMD5)
	448	{
	449	if (GenOnly == true)
	450	return true;
	451
cde41ae8	452	MD5Res = bytes2hex(CurStat.MD5, sizeof(CurStat.MD5));
b2e465d6	453	return true;
215b0faf	454	}
b2e465d6	455
cde41ae8	456	Stats.MD5Bytes += CurStat.FileSize;
b2e465d6	457
215b0faf	458	if (OpenFile() == false)
cde41ae8	459	return false;
215b0faf	460
b2e465d6	461	MD5Summation MD5;
109eb151	462	if (Fd->Seek(0) == false \|\| MD5.AddFD(*Fd, CurStat.FileSize) == false)
b2e465d6 AL	463	return false;
	464
	465	MD5Res = MD5.Result();
cde41ae8	466	hex2bytes(CurStat.MD5, MD5Res.data(), sizeof(CurStat.MD5));
b2e465d6 AL	467	CurStat.Flags \|= FlMD5;
	468	return true;
	469	}
	470	/}}}/
cde41ae8 MV	471	// CacheDB::GetSHA1 - Get the SHA1 hash /{{{/
	472	// ---------------------------------------------------------------------
	473	/* */
9209ec47	474	bool CacheDB::GetSHA1(bool const &GenOnly)
cde41ae8 MV	475	{
	476	// Try to read the control information out of the DB.
	477	if ((CurStat.Flags & FlSHA1) == FlSHA1)
	478	{
	479	if (GenOnly == true)
	480	return true;
	481
	482	SHA1Res = bytes2hex(CurStat.SHA1, sizeof(CurStat.SHA1));
	483	return true;
	484	}
	485
	486	Stats.SHA1Bytes += CurStat.FileSize;
	487
215b0faf	488	if (OpenFile() == false)
cde41ae8	489	return false;
215b0faf	490
cde41ae8	491	SHA1Summation SHA1;
109eb151	492	if (Fd->Seek(0) == false \|\| SHA1.AddFD(*Fd, CurStat.FileSize) == false)
cde41ae8 MV	493	return false;
	494
	495	SHA1Res = SHA1.Result();
	496	hex2bytes(CurStat.SHA1, SHA1Res.data(), sizeof(CurStat.SHA1));
	497	CurStat.Flags \|= FlSHA1;
	498	return true;
	499	}
	500	/}}}/
	501	// CacheDB::GetSHA256 - Get the SHA256 hash /{{{/
	502	// ---------------------------------------------------------------------
	503	/* */
9209ec47	504	bool CacheDB::GetSHA256(bool const &GenOnly)
cde41ae8 MV	505	{
	506	// Try to read the control information out of the DB.
	507	if ((CurStat.Flags & FlSHA256) == FlSHA256)
	508	{
	509	if (GenOnly == true)
	510	return true;
	511
	512	SHA256Res = bytes2hex(CurStat.SHA256, sizeof(CurStat.SHA256));
	513	return true;
	514	}
	515
	516	Stats.SHA256Bytes += CurStat.FileSize;
	517
215b0faf	518	if (OpenFile() == false)
cde41ae8	519	return false;
215b0faf	520
cde41ae8	521	SHA256Summation SHA256;
109eb151	522	if (Fd->Seek(0) == false \|\| SHA256.AddFD(*Fd, CurStat.FileSize) == false)
cde41ae8 MV	523	return false;
	524
	525	SHA256Res = SHA256.Result();
	526	hex2bytes(CurStat.SHA256, SHA256Res.data(), sizeof(CurStat.SHA256));
	527	CurStat.Flags \|= FlSHA256;
	528	return true;
	529	}
	530	/}}}/
9a961efc MV	531	// CacheDB::GetSHA256 - Get the SHA256 hash /{{{/
	532	// ---------------------------------------------------------------------
	533	/* */
	534	bool CacheDB::GetSHA512(bool const &GenOnly)
	535	{
	536	// Try to read the control information out of the DB.
	537	if ((CurStat.Flags & FlSHA512) == FlSHA512)
	538	{
	539	if (GenOnly == true)
	540	return true;
	541
	542	SHA512Res = bytes2hex(CurStat.SHA512, sizeof(CurStat.SHA512));
	543	return true;
	544	}
	545
	546	Stats.SHA512Bytes += CurStat.FileSize;
	547
215b0faf	548	if (OpenFile() == false)
9a961efc	549	return false;
215b0faf	550
9a961efc	551	SHA512Summation SHA512;
109eb151	552	if (Fd->Seek(0) == false \|\| SHA512.AddFD(*Fd, CurStat.FileSize) == false)
9a961efc MV	553	return false;
	554
	555	SHA512Res = SHA512.Result();
	556	hex2bytes(CurStat.SHA512, SHA512Res.data(), sizeof(CurStat.SHA512));
	557	CurStat.Flags \|= FlSHA512;
	558	return true;
	559	}
	560	/}}}/
b2e465d6 AL	561	// CacheDB::Finish - Write back the cache structure /{{{/
	562	// ---------------------------------------------------------------------
	563	/* */
	564	bool CacheDB::Finish()
	565	{
	566	// Optimize away some writes.
	567	if (CurStat.Flags == OldStat.Flags &&
9bfe66dc	568	CurStat.mtime == OldStat.mtime)
b2e465d6	569	return true;
cf6bbca0	570
b2e465d6 AL	571	// Write the stat information
b2e465d6 AL	572	CurStat.Flags = htonl(CurStat.Flags);
cde41ae8	573	CurStat.FileSize = htonl(CurStat.FileSize);
37497bd5	574	InitQueryStats();
b2e465d6 AL	575	Put(&CurStat,sizeof(CurStat));
b2e465d6 AL	576	CurStat.Flags = ntohl(CurStat.Flags);
cde41ae8 MV	577	CurStat.FileSize = ntohl(CurStat.FileSize);
cde41ae8 MV	578
b2e465d6 AL	579	return true;
	580	}
	581	/}}}/
	582	// CacheDB::Clean - Clean the Database /{{{/
	583	// ---------------------------------------------------------------------
	584	/* Tidy the database by removing files that no longer exist at all. */
	585	bool CacheDB::Clean()
	586	{
	587	if (DBLoaded == false)
	588	return true;
	589
	590	/* I'm not sure what VERSION_MINOR should be here.. 2.4.14 certainly
	591	needs the lower one and 2.7.7 needs the upper.. */
b2e465d6	592	DBC *Cursor;
c9569a1e	593	if ((errno = Dbp->cursor(Dbp, NULL, &Cursor, 0)) != 0)
dc738e7a	594	return _error->Error(_("Unable to get a cursor"));
b2e465d6 AL	595
	596	DBT Key;
	597	DBT Data;
	598	memset(&Key,0,sizeof(Key));
	599	memset(&Data,0,sizeof(Data));
	600	while ((errno = Cursor->c_get(Cursor,&Key,&Data,DB_NEXT)) == 0)
	601	{
592b401a MV	602	const char Colon = (char)memrchr(Key.data, ':', Key.size);
592b401a MV	603	if (Colon)
b2e465d6	604	{
592b401a MV	605	if (stringcmp(Colon + 1, (char *)Key.data+Key.size,"st") == 0 \|\|
592b401a MV	606	stringcmp(Colon + 1, (char *)Key.data+Key.size,"cl") == 0 \|\|
53ba4e2c	607	stringcmp(Colon + 1, (char *)Key.data+Key.size,"cs") == 0 \|\|
592b401a	608	stringcmp(Colon + 1, (char *)Key.data+Key.size,"cn") == 0)
b2e465d6	609	{
53ba4e2c MV	610	std::string FileName = std::string((const char *)Key.data,Colon);
	611	if (FileExists(FileName) == true) {
	612	continue;
	613	}
b2e465d6 AL	614	}
b2e465d6 AL	615	}
b2e465d6 AL	616	Cursor->c_del(Cursor,0);
b2e465d6 AL	617	}
53ba4e2c MV	618	int res = Dbp->compact(Dbp, NULL, NULL, NULL, NULL, DB_FREE_SPACE, NULL);
	619	if (res < 0)
	620	_error->Warning("compact failed with result %i", res);
	621
	622	if(_config->FindB("Debug::APT::FTPArchive::Clean", false) == true)
	623	Dbp->stat_print(Dbp, 0);
	624
b2e465d6 AL	625
	626	return true;
	627	}
	628	/}}}/