[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;
   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 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 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;
}
									/*}}}*/
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
bf3ad91f	37	CacheDB::CacheDB(std::string const &DB)
21ea1dbb MV	38	: Dbp(0), Fd(NULL), DebFile(0)
	39	{
	40	TmpKey[0]='\0';
	41	ReadyDB(DB);
bf3ad91f	42	}
21ea1dbb MV	43
	44	CacheDB::~CacheDB()
	45	{
	46	ReadyDB();
	47	delete DebFile;
3d8232bf	48	CloseFile();
bf3ad91f	49	}
21ea1dbb	50
b2e465d6 AL	51	// CacheDB::ReadyDB - Ready the DB2 /{{{/
	52	// ---------------------------------------------------------------------
	53	/* This opens the DB2 file for caching package information */
8f3ba4e8	54	bool CacheDB::ReadyDB(std::string const &DB)
b2e465d6	55	{
c9569a1e AL	56	int err;
c9569a1e AL	57
b2e465d6 AL	58	ReadOnly = _config->FindB("APT::FTPArchive::ReadOnlyDB",false);
	59
	60	// Close the old DB
	61	if (Dbp != 0)
	62	Dbp->close(Dbp,0);
	63
	64	/* Check if the DB was disabled while running and deal with a
	65	corrupted DB */
	66	if (DBFailed() == true)
	67	{
dc738e7a	68	_error->Warning(_("DB was corrupted, file renamed to %s.old"),DBFile.c_str());
b2e465d6 AL	69	rename(DBFile.c_str(),(DBFile+".old").c_str());
	70	}
	71
	72	DBLoaded = false;
	73	Dbp = 0;
8f3ba4e8	74	DBFile = std::string();
b2e465d6 AL	75
	76	if (DB.empty())
	77	return true;
c9569a1e AL	78
c9569a1e AL	79	db_create(&Dbp, NULL, 0);
cde41ae8	80	if ((err = Dbp->open(Dbp, NULL, DB.c_str(), NULL, DB_BTREE,
b2e465d6	81	(ReadOnly?DB_RDONLY:DB_CREATE),
c9569a1e	82	0644)) != 0)
b2e465d6	83	{
c9569a1e AL	84	if (err == DB_OLD_VERSION)
	85	{
	86	_error->Warning(_("DB is old, attempting to upgrade %s"),DBFile.c_str());
	87	err = Dbp->upgrade(Dbp, DB.c_str(), 0);
	88	if (!err)
	89	err = Dbp->open(Dbp, NULL, DB.c_str(), NULL, DB_HASH,
	90	(ReadOnly?DB_RDONLY:DB_CREATE), 0644);
	91
	92	}
eb2bc4f2 MV	93	// the database format has changed from DB_HASH to DB_BTREE in
	94	// apt 0.6.44
	95	if (err == EINVAL)
	96	{
c6474fb6	97	_error->Error(_("DB format is invalid. If you upgraded from an older version of apt, please remove and re-create the database."));
eb2bc4f2	98	}
c9569a1e AL	99	if (err)
	100	{
	101	Dbp = 0;
	102	return _error->Error(_("Unable to open DB file %s: %s"),DB.c_str(), db_strerror(err));
	103	}
b2e465d6	104	}
243b2a38	105
b2e465d6 AL	106	DBFile = DB;
	107	DBLoaded = true;
	108	return true;
	109	}
	110	/}}}/
c6474fb6	111	// CacheDB::OpenFile - Open the file /{{{/
b2e465d6	112	// ---------------------------------------------------------------------
cde41ae8 MV	113	/* */
	114	bool CacheDB::OpenFile()
	115	{
acea28d0 MV	116	// always close existing file first
acea28d0 MV	117	CloseFile();
215b0faf MV	118
	119	// open a new file
	120	Fd = new FileFd(FileName,FileFd::ReadOnly);
	121	if (_error->PendingError() == true)
	122	{
	123	CloseFile();
	124	return false;
	125	}
	126	return true;
cde41ae8 MV	127	}
cde41ae8 MV	128	/}}}/
215b0faf	129	// CacheDB::CloseFile - Close the file /{{{/
ce928105 MV	130	void CacheDB::CloseFile()
ce928105 MV	131	{
215b0faf MV	132	if(Fd != NULL)
	133	{
	134	delete Fd;
	135	Fd = NULL;
	136	}
ce928105	137	}
215b0faf MV	138	/}}}/
215b0faf MV	139	// CacheDB::OpenDebFile - Open a debfile /{{{/
ce928105 MV	140	bool CacheDB::OpenDebFile()
ce928105 MV	141	{
acea28d0 MV	142	// always close existing file first
acea28d0 MV	143	CloseDebFile();
215b0faf MV	144
	145	// first open the fd, then pass it to the debDebFile
	146	if(OpenFile() == false)
	147	return false;
ce928105 MV	148	DebFile = new debDebFile(*Fd);
	149	if (_error->PendingError() == true)
	150	return false;
	151	return true;
	152	}
215b0faf MV	153	/}}}/
215b0faf MV	154	// CacheDB::CloseDebFile - Close a debfile again /{{{/
ce928105 MV	155	void CacheDB::CloseDebFile()
ce928105 MV	156	{
215b0faf	157	CloseFile();
ce928105	158
215b0faf MV	159	if(DebFile != NULL)
	160	{
	161	delete DebFile;
	162	DebFile = NULL;
	163	}
	164	}
	165	/}}}/
cde41ae8 MV	166	// CacheDB::GetFileStat - Get stats from the file /{{{/
	167	// ---------------------------------------------------------------------
	168	/* This gets the size from the database if it's there. If we need
	169	* to look at the file, also get the mtime from the file. */
ff574e76	170	bool CacheDB::GetFileStat(bool const &doStat)
cde41ae8	171	{
215b0faf MV	172	if ((CurStat.Flags & FlSize) == FlSize && doStat == false)
	173	return true;
	174
	175	/* Get it from the file. */
	176	if (OpenFile() == false)
	177	return false;
	178
	179	// Stat the file
	180	struct stat St;
	181	if (fstat(Fd->Fd(),&St) != 0)
	182	{
	183	CloseFile();
	184	return _error->Errno("fstat",
	185	_("Failed to stat %s"),FileName.c_str());
	186	}
	187	CurStat.FileSize = St.st_size;
	188	CurStat.mtime = htonl(St.st_mtime);
	189	CurStat.Flags \|= FlSize;
	190
243b2a38 MV	191	return true;
	192	}
	193	/}}}/
	194	// CacheDB::GetCurStatCompatOldFormat /{{{/
	195	// ---------------------------------------------------------------------
	196	/* Read the old (32bit FileSize) StateStore format from disk */
	197	bool CacheDB::GetCurStatCompatOldFormat()
	198	{
	199	InitQueryStats();
	200	Data.data = &CurStatOldFormat;
	201	Data.flags = DB_DBT_USERMEM;
	202	Data.ulen = sizeof(CurStatOldFormat);
	203	if (Get() == false)
	204	{
	205	CurStat.Flags = 0;
	206	} else {
	207	CurStat.Flags = CurStatOldFormat.Flags;
	208	CurStat.mtime = CurStatOldFormat.mtime;
	209	CurStat.FileSize = CurStatOldFormat.FileSize;
	210	memcpy(CurStat.MD5, CurStatOldFormat.MD5, sizeof(CurStat.MD5));
	211	memcpy(CurStat.SHA1, CurStatOldFormat.SHA1, sizeof(CurStat.SHA1));
	212	memcpy(CurStat.SHA256, CurStatOldFormat.SHA256, sizeof(CurStat.SHA256));
	213	}
	214	return true;
	215	}
	216	/}}}/
	217	// CacheDB::GetCurStatCompatOldFormat /{{{/
	218	// ---------------------------------------------------------------------
	219	/* Read the new (64bit FileSize) StateStore format from disk */
	220	bool CacheDB::GetCurStatCompatNewFormat()
	221	{
	222	InitQueryStats();
	223	Data.data = &CurStat;
	224	Data.flags = DB_DBT_USERMEM;
	225	Data.ulen = sizeof(CurStat);
	226	if (Get() == false)
	227	{
	228	CurStat.Flags = 0;
	229	}
215b0faf	230	return true;
cde41ae8 MV	231	}
	232	/}}}/
	233	// CacheDB::GetCurStat - Set the CurStat variable. /{{{/
	234	// ---------------------------------------------------------------------
	235	/* Sets the CurStat variable. Either to 0 if no database is used
	236	* or to the value in the database if one is used */
	237	bool CacheDB::GetCurStat()
b2e465d6	238	{
b2e465d6 AL	239	memset(&CurStat,0,sizeof(CurStat));
b2e465d6 AL	240
215b0faf MV	241	if (DBLoaded)
215b0faf MV	242	{
243b2a38	243	// do a first query to just get the size of the data on disk
37497bd5	244	InitQueryStats();
215b0faf	245	Data.data = &CurStat;
215b0faf	246	Data.flags = DB_DBT_USERMEM;
243b2a38 MV	247	Data.ulen = 0;
	248	Get();
	249
	250	if (Data.size == 0)
b2e465d6	251	{
243b2a38 MV	252	// nothing needs to be done, we just have not data for this deb
	253	}
	254	// check if the record is written in the old format (32bit filesize)
	255	else if(Data.size == sizeof(CurStatOldFormat))
	256	{
	257	GetCurStatCompatOldFormat();
	258	}
	259	else if(Data.size == sizeof(CurStat))
	260	{
	261	GetCurStatCompatNewFormat();
	262	} else {
	263	return _error->Error("Cache record size mismatch (%ul)", Data.size);
	264	}
	265
215b0faf MV	266	CurStat.Flags = ntohl(CurStat.Flags);
215b0faf MV	267	CurStat.FileSize = ntohl(CurStat.FileSize);
b2e465d6	268	}
215b0faf	269	return true;
cde41ae8 MV	270	}
	271	/}}}/
	272	// CacheDB::GetFileInfo - Get all the info about the file /{{{/
	273	// ---------------------------------------------------------------------
a311fb96 DK	274	bool CacheDB::GetFileInfo(std::string const &FileName, bool const &DoControl, bool const &DoContents,
a311fb96 DK	275	bool const &GenContentsOnly, bool const DoSource, unsigned int const DoHashes,
9a961efc	276	bool const &checkMtime)
cde41ae8	277	{
ce928105	278	this->FileName = FileName;
cde41ae8	279
ce928105	280	if (GetCurStat() == false)
ce928105	281	return false;
b2e465d6	282	OldStat = CurStat;
ff574e76	283
ce928105	284	if (GetFileStat(checkMtime) == false)
a311fb96	285	return false;
cde41ae8	286
215b0faf MV	287	/* if mtime changed, update CurStat from disk */
	288	if (checkMtime == true && OldStat.mtime != CurStat.mtime)
	289	CurStat.Flags = FlSize;
	290
	291	Stats.Bytes += CurStat.FileSize;
a311fb96	292	++Stats.Packages;
215b0faf MV	293
215b0faf MV	294	if ((DoControl && LoadControl() == false)
a311fb96 DK	295	\|\| (DoContents && LoadContents(GenContentsOnly) == false)
	296	\|\| (DoSource && LoadSource() == false)
	297	\|\| (DoHashes != 0 && GetHashes(false, DoHashes) == false)
	298	)
215b0faf	299	{
a311fb96	300	return false;
215b0faf	301	}
a311fb96 DK	302
a311fb96 DK	303	return true;
ce928105 MV	304	}
ce928105 MV	305	/}}}/
a311fb96	306	bool CacheDB::LoadSource() /{{{/
ce928105 MV	307	{
	308	// Try to read the control information out of the DB.
	309	if ((CurStat.Flags & FlSource) == FlSource)
	310	{
	311	// Lookup the control information
37497bd5	312	InitQuerySource();
ce928105	313	if (Get() == true && Dsc.TakeDsc(Data.data, Data.size) == true)
53ba4e2c	314	{
ce928105	315	return true;
53ba4e2c	316	}
ce928105 MV	317	CurStat.Flags &= ~FlSource;
ce928105 MV	318	}
215b0faf	319	if (OpenFile() == false)
ce928105	320	return false;
ce928105	321
ce928105 MV	322	Stats.Misses++;
	323	if (Dsc.Read(FileName) == false)
	324	return false;
cde41ae8	325
31be38d2	326	if (Dsc.Length == 0)
ce928105	327	return _error->Error(_("Failed to read .dsc"));
31be38d2	328
ce928105	329	// Write back the control information
37497bd5	330	InitQuerySource();
31be38d2	331	if (Put(Dsc.Data.c_str(), Dsc.Length) == true)
ce928105	332	CurStat.Flags \|= FlSource;
cde41ae8	333
b2e465d6 AL	334	return true;
b2e465d6 AL	335	}
a311fb96	336	/}}}/
b2e465d6 AL	337	// CacheDB::LoadControl - Load Control information /{{{/
	338	// ---------------------------------------------------------------------
	339	/* */
	340	bool CacheDB::LoadControl()
	341	{
	342	// Try to read the control information out of the DB.
	343	if ((CurStat.Flags & FlControl) == FlControl)
	344	{
	345	// Lookup the control information
37497bd5	346	InitQueryControl();
b2e465d6 AL	347	if (Get() == true && Control.TakeControl(Data.data,Data.size) == true)
	348	return true;
	349	CurStat.Flags &= ~FlControl;
	350	}
	351
215b0faf	352	if(OpenDebFile() == false)
cde41ae8	353	return false;
b2e465d6 AL	354
	355	Stats.Misses++;
	356	if (Control.Read(*DebFile) == false)
	357	return false;
	358
	359	if (Control.Control == 0)
dc738e7a	360	return _error->Error(_("Archive has no control record"));
b2e465d6 AL	361
b2e465d6 AL	362	// Write back the control information
37497bd5	363	InitQueryControl();
b2e465d6 AL	364	if (Put(Control.Control,Control.Length) == true)
	365	CurStat.Flags \|= FlControl;
	366	return true;
	367	}
	368	/}}}/
	369	// CacheDB::LoadContents - Load the File Listing /{{{/
	370	// ---------------------------------------------------------------------
	371	/* */
9209ec47	372	bool CacheDB::LoadContents(bool const &GenOnly)
b2e465d6 AL	373	{
	374	// Try to read the control information out of the DB.
	375	if ((CurStat.Flags & FlContents) == FlContents)
	376	{
	377	if (GenOnly == true)
	378	return true;
	379
	380	// Lookup the contents information
37497bd5	381	InitQueryContent();
b2e465d6 AL	382	if (Get() == true)
	383	{
	384	if (Contents.TakeContents(Data.data,Data.size) == true)
	385	return true;
	386	}
	387
	388	CurStat.Flags &= ~FlContents;
	389	}
	390
215b0faf	391	if(OpenDebFile() == false)
cde41ae8	392	return false;
b2e465d6	393
0a3b93fc	394	Stats.Misses++;
b2e465d6 AL	395	if (Contents.Read(*DebFile) == false)
	396	return false;
	397
	398	// Write back the control information
37497bd5	399	InitQueryContent();
b2e465d6 AL	400	if (Put(Contents.Data,Contents.CurSize) == true)
	401	CurStat.Flags \|= FlContents;
	402	return true;
	403	}
	404	/}}}/
a311fb96	405	// CacheDB::GetHashes - Get the hashs /{{{/
8f3ba4e8	406	static std::string bytes2hex(uint8_t *bytes, size_t length) {
76ef756a	407	char buf[3];
0fffbc8c	408	std::string space;
76ef756a MV	409
	410	space.reserve(length*2 + 1);
	411	for (size_t i = 0; i < length; i++) {
	412	snprintf(buf, sizeof(buf), "%02x", bytes[i]);
	413	space.append(buf);
	414	}
	415	return space;
cde41ae8 MV	416	}
cde41ae8 MV	417
9209ec47	418	static inline unsigned char xdig2num(char const &dig) {
cde41ae8 MV	419	if (isdigit(dig)) return dig - '0';
	420	if ('a' <= dig && dig <= 'f') return dig - 'a' + 10;
	421	if ('A' <= dig && dig <= 'F') return dig - 'A' + 10;
	422	return 0;
	423	}
	424
	425	static void hex2bytes(uint8_t bytes, const char hex, int length) {
	426	while (length-- > 0) {
	427	*bytes = 0;
	428	if (isxdigit(hex[0]) && isxdigit(hex[1])) {
	429	bytes = xdig2num(hex[0]) 16 + xdig2num(hex[1]);
	430	hex += 2;
	431	}
	432	bytes++;
	433	}
	434	}
a311fb96	435	bool CacheDB::GetHashes(bool const GenOnly, unsigned int const DoHashes)
b2e465d6	436	{
51018e94 DB	437	unsigned int notCachedHashes = 0;
	438	if ((CurStat.Flags & FlMD5) != FlMD5)
	439	{
	440	notCachedHashes = notCachedHashes \| Hashes::MD5SUM;
	441	}
	442	if ((CurStat.Flags & FlSHA1) != FlSHA1)
	443	{
	444	notCachedHashes = notCachedHashes \| Hashes::SHA1SUM;
	445	}
	446	if ((CurStat.Flags & FlSHA256) != FlSHA256)
	447	{
	448	notCachedHashes = notCachedHashes \| Hashes::SHA256SUM;
	449	}
	450	if ((CurStat.Flags & FlSHA512) != FlSHA512)
	451	{
	452	notCachedHashes = notCachedHashes \| Hashes::SHA512SUM;
	453	}
	454	unsigned int FlHashes = DoHashes & notCachedHashes;
a311fb96	455	HashesList.clear();
215b0faf	456
a311fb96	457	if (FlHashes != 0)
cde41ae8	458	{
a311fb96 DK	459	if (OpenFile() == false)
a311fb96 DK	460	return false;
cde41ae8	461
9224ce3d DK	462	Hashes hashes(FlHashes);
9224ce3d DK	463	if (Fd->Seek(0) == false \|\| hashes.AddFD(*Fd, CurStat.FileSize) == false)
a311fb96	464	return false;
215b0faf	465
a311fb96 DK	466	HashStringList hl = hashes.GetHashStringList();
	467	for (HashStringList::const_iterator hs = hl.begin(); hs != hl.end(); ++hs)
	468	{
	469	HashesList.push_back(*hs);
	470	if (strcasecmp(hs->HashType().c_str(), "SHA512") == 0)
	471	{
	472	Stats.SHA512Bytes += CurStat.FileSize;
	473	hex2bytes(CurStat.SHA512, hs->HashValue().data(), sizeof(CurStat.SHA512));
	474	CurStat.Flags \|= FlSHA512;
	475	}
	476	else if (strcasecmp(hs->HashType().c_str(), "SHA256") == 0)
	477	{
	478	Stats.SHA256Bytes += CurStat.FileSize;
	479	hex2bytes(CurStat.SHA256, hs->HashValue().data(), sizeof(CurStat.SHA256));
	480	CurStat.Flags \|= FlSHA256;
	481	}
	482	else if (strcasecmp(hs->HashType().c_str(), "SHA1") == 0)
	483	{
	484	Stats.SHA1Bytes += CurStat.FileSize;
	485	hex2bytes(CurStat.SHA1, hs->HashValue().data(), sizeof(CurStat.SHA1));
	486	CurStat.Flags \|= FlSHA1;
	487	}
	488	else if (strcasecmp(hs->HashType().c_str(), "MD5Sum") == 0)
	489	{
	490	Stats.MD5Bytes += CurStat.FileSize;
	491	hex2bytes(CurStat.MD5, hs->HashValue().data(), sizeof(CurStat.MD5));
	492	CurStat.Flags \|= FlMD5;
	493	}
23397c9d DK	494	else if (strcasecmp(hs->HashType().c_str(), "Checksum-FileSize") == 0)
	495	{
	496	// we store it in a different field already
	497	}
a311fb96 DK	498	else
	499	return _error->Error("Got unknown unrequested hashtype %s", hs->HashType().c_str());
	500	}
cde41ae8	501	}
a311fb96	502	if (GenOnly == true)
9a961efc	503	return true;
215b0faf	504
d5a46051 DK	505	bool ret = true;
	506	#define PUSH_BACK_HASH(FLAG, TYPE, VALUE) \
	507	if ((CurStat.Flags & FLAG) == FLAG) \
	508	ret &= HashesList.push_back(HashString(TYPE, bytes2hex(VALUE, sizeof(VALUE))));
	509	PUSH_BACK_HASH(FlMD5, "MD5Sum", CurStat.MD5);
	510	PUSH_BACK_HASH(FlSHA1, "SHA1", CurStat.SHA1);
	511	PUSH_BACK_HASH(FlSHA256, "SHA256", CurStat.SHA256);
	512	PUSH_BACK_HASH(FlSHA512, "SHA512", CurStat.SHA512);
	513	return ret;
9a961efc MV	514	}
9a961efc MV	515	/}}}/
b2e465d6 AL	516	// CacheDB::Finish - Write back the cache structure /{{{/
	517	// ---------------------------------------------------------------------
	518	/* */
	519	bool CacheDB::Finish()
	520	{
	521	// Optimize away some writes.
	522	if (CurStat.Flags == OldStat.Flags &&
9bfe66dc	523	CurStat.mtime == OldStat.mtime)
b2e465d6	524	return true;
cf6bbca0	525
b2e465d6 AL	526	// Write the stat information
b2e465d6 AL	527	CurStat.Flags = htonl(CurStat.Flags);
cde41ae8	528	CurStat.FileSize = htonl(CurStat.FileSize);
37497bd5	529	InitQueryStats();
b2e465d6 AL	530	Put(&CurStat,sizeof(CurStat));
b2e465d6 AL	531	CurStat.Flags = ntohl(CurStat.Flags);
cde41ae8 MV	532	CurStat.FileSize = ntohl(CurStat.FileSize);
cde41ae8 MV	533
b2e465d6 AL	534	return true;
	535	}
	536	/}}}/
	537	// CacheDB::Clean - Clean the Database /{{{/
	538	// ---------------------------------------------------------------------
	539	/* Tidy the database by removing files that no longer exist at all. */
	540	bool CacheDB::Clean()
	541	{
	542	if (DBLoaded == false)
	543	return true;
	544
	545	/* I'm not sure what VERSION_MINOR should be here.. 2.4.14 certainly
	546	needs the lower one and 2.7.7 needs the upper.. */
b2e465d6	547	DBC *Cursor;
c9569a1e	548	if ((errno = Dbp->cursor(Dbp, NULL, &Cursor, 0)) != 0)
dc738e7a	549	return _error->Error(_("Unable to get a cursor"));
b2e465d6 AL	550
	551	DBT Key;
	552	DBT Data;
	553	memset(&Key,0,sizeof(Key));
	554	memset(&Data,0,sizeof(Data));
	555	while ((errno = Cursor->c_get(Cursor,&Key,&Data,DB_NEXT)) == 0)
	556	{
592b401a MV	557	const char Colon = (char)memrchr(Key.data, ':', Key.size);
592b401a MV	558	if (Colon)
b2e465d6	559	{
592b401a MV	560	if (stringcmp(Colon + 1, (char *)Key.data+Key.size,"st") == 0 \|\|
592b401a MV	561	stringcmp(Colon + 1, (char *)Key.data+Key.size,"cl") == 0 \|\|
53ba4e2c	562	stringcmp(Colon + 1, (char *)Key.data+Key.size,"cs") == 0 \|\|
592b401a	563	stringcmp(Colon + 1, (char *)Key.data+Key.size,"cn") == 0)
b2e465d6	564	{
53ba4e2c MV	565	std::string FileName = std::string((const char *)Key.data,Colon);
	566	if (FileExists(FileName) == true) {
	567	continue;
	568	}
b2e465d6 AL	569	}
b2e465d6 AL	570	}
b2e465d6 AL	571	Cursor->c_del(Cursor,0);
b2e465d6 AL	572	}
53ba4e2c MV	573	int res = Dbp->compact(Dbp, NULL, NULL, NULL, NULL, DB_FREE_SPACE, NULL);
	574	if (res < 0)
	575	_error->Warning("compact failed with result %i", res);
	576
	577	if(_config->FindB("Debug::APT::FTPArchive::Clean", false) == true)
	578	Dbp->stat_print(Dbp, 0);
	579
b2e465d6 AL	580
	581	return true;
	582	}
	583	/}}}/