[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 <apt-pkg/hashes.h>

#include <netinet/in.h>       // htonl, etc
#include <ctype.h>
#include <stddef.h>
#include <sys/stat.h>
#include <strings.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, 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.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;
}
									/*}}}*/
// CacheDB::GetHashes - Get the hashs					/*{{{*/
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 FlHashes = DoHashes & (Hashes::MD5SUM | Hashes::SHA1SUM | Hashes::SHA256SUM | Hashes::SHA512SUM);
   HashesList.clear();

   if (FlHashes != 0)
   {
      if (OpenFile() == false)
	 return false;

      Hashes hashes;
      if (Fd->Seek(0) == false || hashes.AddFD(*Fd, CurStat.FileSize, FlHashes) == 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
	    return _error->Error("Got unknown unrequested hashtype %s", hs->HashType().c_str());
      }
   }
   if (GenOnly == true)
      return true;

   return HashesList.push_back(HashString("MD5Sum", bytes2hex(CurStat.MD5, sizeof(CurStat.MD5)))) &&
      HashesList.push_back(HashString("SHA1", bytes2hex(CurStat.SHA1, sizeof(CurStat.SHA1)))) &&
      HashesList.push_back(HashString("SHA256", bytes2hex(CurStat.SHA256, sizeof(CurStat.SHA256)))) &&
      HashesList.push_back(HashString("SHA512", bytes2hex(CurStat.SHA512, sizeof(CurStat.SHA512))));
}
									/*}}}*/
// 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>
a311fb96	24	#include <apt-pkg/hashes.h>
a00a9b44	25
b2e465d6	26	#include <netinet/in.h> // htonl, etc
453b82a3 DK	27	#include <ctype.h>
	28	#include <stddef.h>
	29	#include <sys/stat.h>
a311fb96	30	#include <strings.h>
ea542140	31
ea542140	32	#include "cachedb.h"
a00a9b44 DK	33
a00a9b44 DK	34	#include <apti18n.h>
b2e465d6 AL	35	/}}}/
b2e465d6 AL	36
21ea1dbb MV	37	CacheDB::CacheDB(std::string const &DB)
	38	: Dbp(0), Fd(NULL), DebFile(0)
	39	{
	40	TmpKey[0]='\0';
	41	ReadyDB(DB);
	42	};
	43
	44	CacheDB::~CacheDB()
	45	{
	46	ReadyDB();
	47	delete DebFile;
	48	};
	49
b2e465d6 AL	50	// CacheDB::ReadyDB - Ready the DB2 /{{{/
	51	// ---------------------------------------------------------------------
	52	/* This opens the DB2 file for caching package information */
8f3ba4e8	53	bool CacheDB::ReadyDB(std::string const &DB)
b2e465d6	54	{
c9569a1e AL	55	int err;
c9569a1e AL	56
b2e465d6 AL	57	ReadOnly = _config->FindB("APT::FTPArchive::ReadOnlyDB",false);
	58
	59	// Close the old DB
	60	if (Dbp != 0)
	61	Dbp->close(Dbp,0);
	62
	63	/* Check if the DB was disabled while running and deal with a
	64	corrupted DB */
	65	if (DBFailed() == true)
	66	{
dc738e7a	67	_error->Warning(_("DB was corrupted, file renamed to %s.old"),DBFile.c_str());
b2e465d6 AL	68	rename(DBFile.c_str(),(DBFile+".old").c_str());
	69	}
	70
	71	DBLoaded = false;
	72	Dbp = 0;
8f3ba4e8	73	DBFile = std::string();
b2e465d6 AL	74
	75	if (DB.empty())
	76	return true;
c9569a1e AL	77
c9569a1e AL	78	db_create(&Dbp, NULL, 0);
cde41ae8	79	if ((err = Dbp->open(Dbp, NULL, DB.c_str(), NULL, DB_BTREE,
b2e465d6	80	(ReadOnly?DB_RDONLY:DB_CREATE),
c9569a1e	81	0644)) != 0)
b2e465d6	82	{
c9569a1e AL	83	if (err == DB_OLD_VERSION)
	84	{
	85	_error->Warning(_("DB is old, attempting to upgrade %s"),DBFile.c_str());
	86	err = Dbp->upgrade(Dbp, DB.c_str(), 0);
	87	if (!err)
	88	err = Dbp->open(Dbp, NULL, DB.c_str(), NULL, DB_HASH,
	89	(ReadOnly?DB_RDONLY:DB_CREATE), 0644);
	90
	91	}
eb2bc4f2 MV	92	// the database format has changed from DB_HASH to DB_BTREE in
	93	// apt 0.6.44
	94	if (err == EINVAL)
	95	{
c6474fb6	96	_error->Error(_("DB format is invalid. If you upgraded from an older version of apt, please remove and re-create the database."));
eb2bc4f2	97	}
c9569a1e AL	98	if (err)
	99	{
	100	Dbp = 0;
	101	return _error->Error(_("Unable to open DB file %s: %s"),DB.c_str(), db_strerror(err));
	102	}
b2e465d6	103	}
243b2a38	104
b2e465d6 AL	105	DBFile = DB;
	106	DBLoaded = true;
	107	return true;
	108	}
	109	/}}}/
c6474fb6	110	// CacheDB::OpenFile - Open the file /{{{/
b2e465d6	111	// ---------------------------------------------------------------------
cde41ae8 MV	112	/* */
	113	bool CacheDB::OpenFile()
	114	{
acea28d0 MV	115	// always close existing file first
acea28d0 MV	116	CloseFile();
215b0faf MV	117
	118	// open a new file
	119	Fd = new FileFd(FileName,FileFd::ReadOnly);
	120	if (_error->PendingError() == true)
	121	{
	122	CloseFile();
	123	return false;
	124	}
	125	return true;
cde41ae8 MV	126	}
cde41ae8 MV	127	/}}}/
215b0faf	128	// CacheDB::CloseFile - Close the file /{{{/
ce928105 MV	129	void CacheDB::CloseFile()
ce928105 MV	130	{
215b0faf MV	131	if(Fd != NULL)
	132	{
	133	delete Fd;
	134	Fd = NULL;
	135	}
ce928105	136	}
215b0faf MV	137	/}}}/
215b0faf MV	138	// CacheDB::OpenDebFile - Open a debfile /{{{/
ce928105 MV	139	bool CacheDB::OpenDebFile()
ce928105 MV	140	{
acea28d0 MV	141	// always close existing file first
acea28d0 MV	142	CloseDebFile();
215b0faf MV	143
	144	// first open the fd, then pass it to the debDebFile
	145	if(OpenFile() == false)
	146	return false;
ce928105 MV	147	DebFile = new debDebFile(*Fd);
	148	if (_error->PendingError() == true)
	149	return false;
	150	return true;
	151	}
215b0faf MV	152	/}}}/
215b0faf MV	153	// CacheDB::CloseDebFile - Close a debfile again /{{{/
ce928105 MV	154	void CacheDB::CloseDebFile()
ce928105 MV	155	{
215b0faf	156	CloseFile();
ce928105	157
215b0faf MV	158	if(DebFile != NULL)
	159	{
	160	delete DebFile;
	161	DebFile = NULL;
	162	}
	163	}
	164	/}}}/
cde41ae8 MV	165	// CacheDB::GetFileStat - Get stats from the file /{{{/
	166	// ---------------------------------------------------------------------
	167	/* This gets the size from the database if it's there. If we need
	168	* to look at the file, also get the mtime from the file. */
ff574e76	169	bool CacheDB::GetFileStat(bool const &doStat)
cde41ae8	170	{
215b0faf MV	171	if ((CurStat.Flags & FlSize) == FlSize && doStat == false)
	172	return true;
	173
	174	/* Get it from the file. */
	175	if (OpenFile() == false)
	176	return false;
	177
	178	// Stat the file
	179	struct stat St;
	180	if (fstat(Fd->Fd(),&St) != 0)
	181	{
	182	CloseFile();
	183	return _error->Errno("fstat",
	184	_("Failed to stat %s"),FileName.c_str());
	185	}
	186	CurStat.FileSize = St.st_size;
	187	CurStat.mtime = htonl(St.st_mtime);
	188	CurStat.Flags \|= FlSize;
	189
243b2a38 MV	190	return true;
	191	}
	192	/}}}/
	193	// CacheDB::GetCurStatCompatOldFormat /{{{/
	194	// ---------------------------------------------------------------------
	195	/* Read the old (32bit FileSize) StateStore format from disk */
	196	bool CacheDB::GetCurStatCompatOldFormat()
	197	{
	198	InitQueryStats();
	199	Data.data = &CurStatOldFormat;
	200	Data.flags = DB_DBT_USERMEM;
	201	Data.ulen = sizeof(CurStatOldFormat);
	202	if (Get() == false)
	203	{
	204	CurStat.Flags = 0;
	205	} else {
	206	CurStat.Flags = CurStatOldFormat.Flags;
	207	CurStat.mtime = CurStatOldFormat.mtime;
	208	CurStat.FileSize = CurStatOldFormat.FileSize;
	209	memcpy(CurStat.MD5, CurStatOldFormat.MD5, sizeof(CurStat.MD5));
	210	memcpy(CurStat.SHA1, CurStatOldFormat.SHA1, sizeof(CurStat.SHA1));
	211	memcpy(CurStat.SHA256, CurStatOldFormat.SHA256, sizeof(CurStat.SHA256));
	212	}
	213	return true;
	214	}
	215	/}}}/
	216	// CacheDB::GetCurStatCompatOldFormat /{{{/
	217	// ---------------------------------------------------------------------
	218	/* Read the new (64bit FileSize) StateStore format from disk */
	219	bool CacheDB::GetCurStatCompatNewFormat()
	220	{
	221	InitQueryStats();
	222	Data.data = &CurStat;
	223	Data.flags = DB_DBT_USERMEM;
	224	Data.ulen = sizeof(CurStat);
	225	if (Get() == false)
	226	{
	227	CurStat.Flags = 0;
	228	}
215b0faf	229	return true;
cde41ae8 MV	230	}
	231	/}}}/
	232	// CacheDB::GetCurStat - Set the CurStat variable. /{{{/
	233	// ---------------------------------------------------------------------
	234	/* Sets the CurStat variable. Either to 0 if no database is used
	235	* or to the value in the database if one is used */
	236	bool CacheDB::GetCurStat()
b2e465d6	237	{
b2e465d6 AL	238	memset(&CurStat,0,sizeof(CurStat));
b2e465d6 AL	239
215b0faf MV	240	if (DBLoaded)
215b0faf MV	241	{
243b2a38	242	// do a first query to just get the size of the data on disk
37497bd5	243	InitQueryStats();
215b0faf	244	Data.data = &CurStat;
215b0faf	245	Data.flags = DB_DBT_USERMEM;
243b2a38 MV	246	Data.ulen = 0;
	247	Get();
	248
	249	if (Data.size == 0)
b2e465d6	250	{
243b2a38 MV	251	// nothing needs to be done, we just have not data for this deb
	252	}
	253	// check if the record is written in the old format (32bit filesize)
	254	else if(Data.size == sizeof(CurStatOldFormat))
	255	{
	256	GetCurStatCompatOldFormat();
	257	}
	258	else if(Data.size == sizeof(CurStat))
	259	{
	260	GetCurStatCompatNewFormat();
	261	} else {
	262	return _error->Error("Cache record size mismatch (%ul)", Data.size);
	263	}
	264
215b0faf MV	265	CurStat.Flags = ntohl(CurStat.Flags);
215b0faf MV	266	CurStat.FileSize = ntohl(CurStat.FileSize);
b2e465d6	267	}
215b0faf	268	return true;
cde41ae8 MV	269	}
	270	/}}}/
	271	// CacheDB::GetFileInfo - Get all the info about the file /{{{/
	272	// ---------------------------------------------------------------------
a311fb96 DK	273	bool CacheDB::GetFileInfo(std::string const &FileName, bool const &DoControl, bool const &DoContents,
a311fb96 DK	274	bool const &GenContentsOnly, bool const DoSource, unsigned int const DoHashes,
9a961efc	275	bool const &checkMtime)
cde41ae8	276	{
ce928105	277	this->FileName = FileName;
cde41ae8	278
ce928105	279	if (GetCurStat() == false)
ce928105	280	return false;
b2e465d6	281	OldStat = CurStat;
ff574e76	282
ce928105	283	if (GetFileStat(checkMtime) == false)
a311fb96	284	return false;
cde41ae8	285
215b0faf MV	286	/* if mtime changed, update CurStat from disk */
	287	if (checkMtime == true && OldStat.mtime != CurStat.mtime)
	288	CurStat.Flags = FlSize;
	289
	290	Stats.Bytes += CurStat.FileSize;
a311fb96	291	++Stats.Packages;
215b0faf MV	292
215b0faf MV	293	if ((DoControl && LoadControl() == false)
a311fb96 DK	294	\|\| (DoContents && LoadContents(GenContentsOnly) == false)
	295	\|\| (DoSource && LoadSource() == false)
	296	\|\| (DoHashes != 0 && GetHashes(false, DoHashes) == false)
	297	)
215b0faf	298	{
a311fb96	299	return false;
215b0faf	300	}
a311fb96 DK	301
a311fb96 DK	302	return true;
ce928105 MV	303	}
ce928105 MV	304	/}}}/
a311fb96	305	bool CacheDB::LoadSource() /{{{/
ce928105 MV	306	{
	307	// Try to read the control information out of the DB.
	308	if ((CurStat.Flags & FlSource) == FlSource)
	309	{
	310	// Lookup the control information
37497bd5	311	InitQuerySource();
ce928105	312	if (Get() == true && Dsc.TakeDsc(Data.data, Data.size) == true)
53ba4e2c	313	{
ce928105	314	return true;
53ba4e2c	315	}
ce928105 MV	316	CurStat.Flags &= ~FlSource;
ce928105 MV	317	}
215b0faf	318	if (OpenFile() == false)
ce928105	319	return false;
ce928105	320
ce928105 MV	321	Stats.Misses++;
	322	if (Dsc.Read(FileName) == false)
	323	return false;
cde41ae8	324
ce928105 MV	325	if (Dsc.Data == 0)
	326	return _error->Error(_("Failed to read .dsc"));
	327
	328	// Write back the control information
37497bd5	329	InitQuerySource();
ce928105 MV	330	if (Put(Dsc.Data, Dsc.Length) == true)
ce928105 MV	331	CurStat.Flags \|= FlSource;
cde41ae8	332
b2e465d6 AL	333	return true;
b2e465d6 AL	334	}
a311fb96	335	/}}}/
b2e465d6 AL	336	// CacheDB::LoadControl - Load Control information /{{{/
	337	// ---------------------------------------------------------------------
	338	/* */
	339	bool CacheDB::LoadControl()
	340	{
	341	// Try to read the control information out of the DB.
	342	if ((CurStat.Flags & FlControl) == FlControl)
	343	{
	344	// Lookup the control information
37497bd5	345	InitQueryControl();
b2e465d6 AL	346	if (Get() == true && Control.TakeControl(Data.data,Data.size) == true)
	347	return true;
	348	CurStat.Flags &= ~FlControl;
	349	}
	350
215b0faf	351	if(OpenDebFile() == false)
cde41ae8	352	return false;
b2e465d6 AL	353
	354	Stats.Misses++;
	355	if (Control.Read(*DebFile) == false)
	356	return false;
	357
	358	if (Control.Control == 0)
dc738e7a	359	return _error->Error(_("Archive has no control record"));
b2e465d6 AL	360
b2e465d6 AL	361	// Write back the control information
37497bd5	362	InitQueryControl();
b2e465d6 AL	363	if (Put(Control.Control,Control.Length) == true)
	364	CurStat.Flags \|= FlControl;
	365	return true;
	366	}
	367	/}}}/
	368	// CacheDB::LoadContents - Load the File Listing /{{{/
	369	// ---------------------------------------------------------------------
	370	/* */
9209ec47	371	bool CacheDB::LoadContents(bool const &GenOnly)
b2e465d6 AL	372	{
	373	// Try to read the control information out of the DB.
	374	if ((CurStat.Flags & FlContents) == FlContents)
	375	{
	376	if (GenOnly == true)
	377	return true;
	378
	379	// Lookup the contents information
37497bd5	380	InitQueryContent();
b2e465d6 AL	381	if (Get() == true)
	382	{
	383	if (Contents.TakeContents(Data.data,Data.size) == true)
	384	return true;
	385	}
	386
	387	CurStat.Flags &= ~FlContents;
	388	}
	389
215b0faf	390	if(OpenDebFile() == false)
cde41ae8	391	return false;
b2e465d6	392
0a3b93fc	393	Stats.Misses++;
b2e465d6 AL	394	if (Contents.Read(*DebFile) == false)
	395	return false;
	396
	397	// Write back the control information
37497bd5	398	InitQueryContent();
b2e465d6 AL	399	if (Put(Contents.Data,Contents.CurSize) == true)
	400	CurStat.Flags \|= FlContents;
	401	return true;
	402	}
	403	/}}}/
a311fb96	404	// CacheDB::GetHashes - Get the hashs /{{{/
8f3ba4e8	405	static std::string bytes2hex(uint8_t *bytes, size_t length) {
76ef756a	406	char buf[3];
0fffbc8c	407	std::string space;
76ef756a MV	408
	409	space.reserve(length*2 + 1);
	410	for (size_t i = 0; i < length; i++) {
	411	snprintf(buf, sizeof(buf), "%02x", bytes[i]);
	412	space.append(buf);
	413	}
	414	return space;
cde41ae8 MV	415	}
cde41ae8 MV	416
9209ec47	417	static inline unsigned char xdig2num(char const &dig) {
cde41ae8 MV	418	if (isdigit(dig)) return dig - '0';
	419	if ('a' <= dig && dig <= 'f') return dig - 'a' + 10;
	420	if ('A' <= dig && dig <= 'F') return dig - 'A' + 10;
	421	return 0;
	422	}
	423
	424	static void hex2bytes(uint8_t bytes, const char hex, int length) {
	425	while (length-- > 0) {
	426	*bytes = 0;
	427	if (isxdigit(hex[0]) && isxdigit(hex[1])) {
	428	bytes = xdig2num(hex[0]) 16 + xdig2num(hex[1]);
	429	hex += 2;
	430	}
	431	bytes++;
	432	}
	433	}
a311fb96	434	bool CacheDB::GetHashes(bool const GenOnly, unsigned int const DoHashes)
b2e465d6	435	{
a311fb96 DK	436	unsigned int FlHashes = DoHashes & (Hashes::MD5SUM \| Hashes::SHA1SUM \| Hashes::SHA256SUM \| Hashes::SHA512SUM);
a311fb96 DK	437	HashesList.clear();
215b0faf	438
a311fb96	439	if (FlHashes != 0)
cde41ae8	440	{
a311fb96 DK	441	if (OpenFile() == false)
a311fb96 DK	442	return false;
cde41ae8	443
a311fb96 DK	444	Hashes hashes;
	445	if (Fd->Seek(0) == false \|\| hashes.AddFD(*Fd, CurStat.FileSize, FlHashes) == false)
	446	return false;
215b0faf	447
a311fb96 DK	448	HashStringList hl = hashes.GetHashStringList();
	449	for (HashStringList::const_iterator hs = hl.begin(); hs != hl.end(); ++hs)
	450	{
	451	HashesList.push_back(*hs);
	452	if (strcasecmp(hs->HashType().c_str(), "SHA512") == 0)
	453	{
	454	Stats.SHA512Bytes += CurStat.FileSize;
	455	hex2bytes(CurStat.SHA512, hs->HashValue().data(), sizeof(CurStat.SHA512));
	456	CurStat.Flags \|= FlSHA512;
	457	}
	458	else if (strcasecmp(hs->HashType().c_str(), "SHA256") == 0)
	459	{
	460	Stats.SHA256Bytes += CurStat.FileSize;
	461	hex2bytes(CurStat.SHA256, hs->HashValue().data(), sizeof(CurStat.SHA256));
	462	CurStat.Flags \|= FlSHA256;
	463	}
	464	else if (strcasecmp(hs->HashType().c_str(), "SHA1") == 0)
	465	{
	466	Stats.SHA1Bytes += CurStat.FileSize;
	467	hex2bytes(CurStat.SHA1, hs->HashValue().data(), sizeof(CurStat.SHA1));
	468	CurStat.Flags \|= FlSHA1;
	469	}
	470	else if (strcasecmp(hs->HashType().c_str(), "MD5Sum") == 0)
	471	{
	472	Stats.MD5Bytes += CurStat.FileSize;
	473	hex2bytes(CurStat.MD5, hs->HashValue().data(), sizeof(CurStat.MD5));
	474	CurStat.Flags \|= FlMD5;
	475	}
	476	else
	477	return _error->Error("Got unknown unrequested hashtype %s", hs->HashType().c_str());
	478	}
cde41ae8	479	}
a311fb96	480	if (GenOnly == true)
9a961efc	481	return true;
215b0faf	482
a311fb96 DK	483	return HashesList.push_back(HashString("MD5Sum", bytes2hex(CurStat.MD5, sizeof(CurStat.MD5)))) &&
	484	HashesList.push_back(HashString("SHA1", bytes2hex(CurStat.SHA1, sizeof(CurStat.SHA1)))) &&
	485	HashesList.push_back(HashString("SHA256", bytes2hex(CurStat.SHA256, sizeof(CurStat.SHA256)))) &&
	486	HashesList.push_back(HashString("SHA512", bytes2hex(CurStat.SHA512, sizeof(CurStat.SHA512))));
9a961efc MV	487	}
9a961efc MV	488	/}}}/
b2e465d6 AL	489	// CacheDB::Finish - Write back the cache structure /{{{/
	490	// ---------------------------------------------------------------------
	491	/* */
	492	bool CacheDB::Finish()
	493	{
	494	// Optimize away some writes.
	495	if (CurStat.Flags == OldStat.Flags &&
9bfe66dc	496	CurStat.mtime == OldStat.mtime)
b2e465d6	497	return true;
cf6bbca0	498
b2e465d6 AL	499	// Write the stat information
b2e465d6 AL	500	CurStat.Flags = htonl(CurStat.Flags);
cde41ae8	501	CurStat.FileSize = htonl(CurStat.FileSize);
37497bd5	502	InitQueryStats();
b2e465d6 AL	503	Put(&CurStat,sizeof(CurStat));
b2e465d6 AL	504	CurStat.Flags = ntohl(CurStat.Flags);
cde41ae8 MV	505	CurStat.FileSize = ntohl(CurStat.FileSize);
cde41ae8 MV	506
b2e465d6 AL	507	return true;
	508	}
	509	/}}}/
	510	// CacheDB::Clean - Clean the Database /{{{/
	511	// ---------------------------------------------------------------------
	512	/* Tidy the database by removing files that no longer exist at all. */
	513	bool CacheDB::Clean()
	514	{
	515	if (DBLoaded == false)
	516	return true;
	517
	518	/* I'm not sure what VERSION_MINOR should be here.. 2.4.14 certainly
	519	needs the lower one and 2.7.7 needs the upper.. */
b2e465d6	520	DBC *Cursor;
c9569a1e	521	if ((errno = Dbp->cursor(Dbp, NULL, &Cursor, 0)) != 0)
dc738e7a	522	return _error->Error(_("Unable to get a cursor"));
b2e465d6 AL	523
	524	DBT Key;
	525	DBT Data;
	526	memset(&Key,0,sizeof(Key));
	527	memset(&Data,0,sizeof(Data));
	528	while ((errno = Cursor->c_get(Cursor,&Key,&Data,DB_NEXT)) == 0)
	529	{
592b401a MV	530	const char Colon = (char)memrchr(Key.data, ':', Key.size);
592b401a MV	531	if (Colon)
b2e465d6	532	{
592b401a MV	533	if (stringcmp(Colon + 1, (char *)Key.data+Key.size,"st") == 0 \|\|
592b401a MV	534	stringcmp(Colon + 1, (char *)Key.data+Key.size,"cl") == 0 \|\|
53ba4e2c	535	stringcmp(Colon + 1, (char *)Key.data+Key.size,"cs") == 0 \|\|
592b401a	536	stringcmp(Colon + 1, (char *)Key.data+Key.size,"cn") == 0)
b2e465d6	537	{
53ba4e2c MV	538	std::string FileName = std::string((const char *)Key.data,Colon);
	539	if (FileExists(FileName) == true) {
	540	continue;
	541	}
b2e465d6 AL	542	}
b2e465d6 AL	543	}
b2e465d6 AL	544	Cursor->c_del(Cursor,0);
b2e465d6 AL	545	}
53ba4e2c MV	546	int res = Dbp->compact(Dbp, NULL, NULL, NULL, NULL, DB_FREE_SPACE, NULL);
	547	if (res < 0)
	548	_error->Warning("compact failed with result %i", res);
	549
	550	if(_config->FindB("Debug::APT::FTPArchive::Clean", false) == true)
	551	Dbp->stat_print(Dbp, 0);
	552
b2e465d6 AL	553
	554	return true;
	555	}
	556	/}}}/