[ntk/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::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)
   {
      /* First see if there is anything about it
         in the database */
      
      /* Get the flags (and mtime) */
      InitQueryStats();
      // Ensure alignment of the returned structure
      Data.data = &CurStat;
      Data.ulen = sizeof(CurStat);
      Data.flags = DB_DBT_USERMEM;
      if (Get() == false)
      {
	 CurStat.Flags = 0;
      }      
      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 AL	101	}
	102
	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
	188	return true;
cde41ae8 MV	189	}
	190	/}}}/
	191	// CacheDB::GetCurStat - Set the CurStat variable. /{{{/
	192	// ---------------------------------------------------------------------
	193	/* Sets the CurStat variable. Either to 0 if no database is used
	194	* or to the value in the database if one is used */
	195	bool CacheDB::GetCurStat()
b2e465d6	196	{
b2e465d6 AL	197	memset(&CurStat,0,sizeof(CurStat));
b2e465d6 AL	198
215b0faf MV	199	if (DBLoaded)
	200	{
	201	/* First see if there is anything about it
	202	in the database */
	203
	204	/* Get the flags (and mtime) */
37497bd5	205	InitQueryStats();
215b0faf MV	206	// Ensure alignment of the returned structure
	207	Data.data = &CurStat;
	208	Data.ulen = sizeof(CurStat);
	209	Data.flags = DB_DBT_USERMEM;
	210	if (Get() == false)
b2e465d6	211	{
b2e465d6	212	CurStat.Flags = 0;
b2e465d6	213	}
215b0faf MV	214	CurStat.Flags = ntohl(CurStat.Flags);
215b0faf MV	215	CurStat.FileSize = ntohl(CurStat.FileSize);
b2e465d6	216	}
215b0faf	217	return true;
cde41ae8 MV	218	}
	219	/}}}/
	220	// CacheDB::GetFileInfo - Get all the info about the file /{{{/
	221	// ---------------------------------------------------------------------
ce928105 MV	222	bool CacheDB::GetFileInfo(std::string const &FileName, bool const &DoControl,
	223	bool const &DoContents,
	224	bool const &GenContentsOnly,
	225	bool const &DoSource,
	226	bool const &DoMD5, bool const &DoSHA1,
	227	bool const &DoSHA256, bool const &DoSHA512,
9a961efc	228	bool const &checkMtime)
cde41ae8	229	{
ce928105 MV	230	bool result = true;
ce928105 MV	231	this->FileName = FileName;
cde41ae8	232
ce928105	233	if (GetCurStat() == false)
ce928105	234	return false;
b2e465d6	235	OldStat = CurStat;
ff574e76	236
ce928105	237	if (GetFileStat(checkMtime) == false)
ce928105	238	return false;
cde41ae8	239
215b0faf MV	240	/* if mtime changed, update CurStat from disk */
	241	if (checkMtime == true && OldStat.mtime != CurStat.mtime)
	242	CurStat.Flags = FlSize;
	243
	244	Stats.Bytes += CurStat.FileSize;
	245	Stats.Packages++;
	246
	247	if ((DoControl && LoadControl() == false)
	248	\|\| (DoContents && LoadContents(GenContentsOnly) == false)
	249	\|\| (DoSource && LoadSource() == false)
	250	\|\| (DoMD5 && GetMD5(false) == false)
	251	\|\| (DoSHA1 && GetSHA1(false) == false)
	252	\|\| (DoSHA256 && GetSHA256(false) == false)
	253	\|\| (DoSHA512 && GetSHA512(false) == false) )
	254	{
	255	result = false;
	256	}
ce928105	257
215b0faf	258	return result;
ce928105 MV	259	}
	260	/}}}/
	261
	262	bool CacheDB::LoadSource()
	263	{
	264	// Try to read the control information out of the DB.
	265	if ((CurStat.Flags & FlSource) == FlSource)
	266	{
	267	// Lookup the control information
37497bd5	268	InitQuerySource();
ce928105	269	if (Get() == true && Dsc.TakeDsc(Data.data, Data.size) == true)
53ba4e2c	270	{
ce928105	271	return true;
53ba4e2c	272	}
ce928105 MV	273	CurStat.Flags &= ~FlSource;
ce928105 MV	274	}
215b0faf	275	if (OpenFile() == false)
ce928105	276	return false;
ce928105	277
ce928105 MV	278	Stats.Misses++;
	279	if (Dsc.Read(FileName) == false)
	280	return false;
cde41ae8	281
ce928105 MV	282	if (Dsc.Data == 0)
	283	return _error->Error(_("Failed to read .dsc"));
	284
	285	// Write back the control information
37497bd5	286	InitQuerySource();
ce928105 MV	287	if (Put(Dsc.Data, Dsc.Length) == true)
ce928105 MV	288	CurStat.Flags \|= FlSource;
cde41ae8	289
b2e465d6 AL	290	return true;
b2e465d6 AL	291	}
ce928105	292
b2e465d6 AL	293	// CacheDB::LoadControl - Load Control information /{{{/
	294	// ---------------------------------------------------------------------
	295	/* */
	296	bool CacheDB::LoadControl()
	297	{
	298	// Try to read the control information out of the DB.
	299	if ((CurStat.Flags & FlControl) == FlControl)
	300	{
	301	// Lookup the control information
37497bd5	302	InitQueryControl();
b2e465d6 AL	303	if (Get() == true && Control.TakeControl(Data.data,Data.size) == true)
	304	return true;
	305	CurStat.Flags &= ~FlControl;
	306	}
	307
215b0faf	308	if(OpenDebFile() == false)
cde41ae8	309	return false;
b2e465d6 AL	310
	311	Stats.Misses++;
	312	if (Control.Read(*DebFile) == false)
	313	return false;
	314
	315	if (Control.Control == 0)
dc738e7a	316	return _error->Error(_("Archive has no control record"));
b2e465d6 AL	317
b2e465d6 AL	318	// Write back the control information
37497bd5	319	InitQueryControl();
b2e465d6 AL	320	if (Put(Control.Control,Control.Length) == true)
	321	CurStat.Flags \|= FlControl;
	322	return true;
	323	}
	324	/}}}/
	325	// CacheDB::LoadContents - Load the File Listing /{{{/
	326	// ---------------------------------------------------------------------
	327	/* */
9209ec47	328	bool CacheDB::LoadContents(bool const &GenOnly)
b2e465d6 AL	329	{
	330	// Try to read the control information out of the DB.
	331	if ((CurStat.Flags & FlContents) == FlContents)
	332	{
	333	if (GenOnly == true)
	334	return true;
	335
	336	// Lookup the contents information
37497bd5	337	InitQueryContent();
b2e465d6 AL	338	if (Get() == true)
	339	{
	340	if (Contents.TakeContents(Data.data,Data.size) == true)
	341	return true;
	342	}
	343
	344	CurStat.Flags &= ~FlContents;
	345	}
	346
215b0faf	347	if(OpenDebFile() == false)
cde41ae8	348	return false;
b2e465d6	349
0a3b93fc	350	Stats.Misses++;
b2e465d6 AL	351	if (Contents.Read(*DebFile) == false)
	352	return false;
	353
	354	// Write back the control information
37497bd5	355	InitQueryContent();
b2e465d6 AL	356	if (Put(Contents.Data,Contents.CurSize) == true)
	357	CurStat.Flags \|= FlContents;
	358	return true;
	359	}
	360	/}}}/
cde41ae8	361
8f3ba4e8	362	static std::string bytes2hex(uint8_t *bytes, size_t length) {
76ef756a	363	char buf[3];
0fffbc8c	364	std::string space;
76ef756a MV	365
	366	space.reserve(length*2 + 1);
	367	for (size_t i = 0; i < length; i++) {
	368	snprintf(buf, sizeof(buf), "%02x", bytes[i]);
	369	space.append(buf);
	370	}
	371	return space;
cde41ae8 MV	372	}
cde41ae8 MV	373
9209ec47	374	static inline unsigned char xdig2num(char const &dig) {
cde41ae8 MV	375	if (isdigit(dig)) return dig - '0';
	376	if ('a' <= dig && dig <= 'f') return dig - 'a' + 10;
	377	if ('A' <= dig && dig <= 'F') return dig - 'A' + 10;
	378	return 0;
	379	}
	380
	381	static void hex2bytes(uint8_t bytes, const char hex, int length) {
	382	while (length-- > 0) {
	383	*bytes = 0;
	384	if (isxdigit(hex[0]) && isxdigit(hex[1])) {
	385	bytes = xdig2num(hex[0]) 16 + xdig2num(hex[1]);
	386	hex += 2;
	387	}
	388	bytes++;
	389	}
	390	}
	391
b2e465d6 AL	392	// CacheDB::GetMD5 - Get the MD5 hash /{{{/
	393	// ---------------------------------------------------------------------
	394	/* */
9209ec47	395	bool CacheDB::GetMD5(bool const &GenOnly)
b2e465d6 AL	396	{
	397	// Try to read the control information out of the DB.
	398	if ((CurStat.Flags & FlMD5) == FlMD5)
	399	{
	400	if (GenOnly == true)
	401	return true;
	402
cde41ae8	403	MD5Res = bytes2hex(CurStat.MD5, sizeof(CurStat.MD5));
b2e465d6	404	return true;
215b0faf	405	}
b2e465d6	406
cde41ae8	407	Stats.MD5Bytes += CurStat.FileSize;
b2e465d6	408
215b0faf	409	if (OpenFile() == false)
cde41ae8	410	return false;
215b0faf	411
b2e465d6	412	MD5Summation MD5;
109eb151	413	if (Fd->Seek(0) == false \|\| MD5.AddFD(*Fd, CurStat.FileSize) == false)
b2e465d6 AL	414	return false;
	415
	416	MD5Res = MD5.Result();
cde41ae8	417	hex2bytes(CurStat.MD5, MD5Res.data(), sizeof(CurStat.MD5));
b2e465d6 AL	418	CurStat.Flags \|= FlMD5;
	419	return true;
	420	}
	421	/}}}/
cde41ae8 MV	422	// CacheDB::GetSHA1 - Get the SHA1 hash /{{{/
	423	// ---------------------------------------------------------------------
	424	/* */
9209ec47	425	bool CacheDB::GetSHA1(bool const &GenOnly)
cde41ae8 MV	426	{
	427	// Try to read the control information out of the DB.
	428	if ((CurStat.Flags & FlSHA1) == FlSHA1)
	429	{
	430	if (GenOnly == true)
	431	return true;
	432
	433	SHA1Res = bytes2hex(CurStat.SHA1, sizeof(CurStat.SHA1));
	434	return true;
	435	}
	436
	437	Stats.SHA1Bytes += CurStat.FileSize;
	438
215b0faf	439	if (OpenFile() == false)
cde41ae8	440	return false;
215b0faf	441
cde41ae8	442	SHA1Summation SHA1;
109eb151	443	if (Fd->Seek(0) == false \|\| SHA1.AddFD(*Fd, CurStat.FileSize) == false)
cde41ae8 MV	444	return false;
	445
	446	SHA1Res = SHA1.Result();
	447	hex2bytes(CurStat.SHA1, SHA1Res.data(), sizeof(CurStat.SHA1));
	448	CurStat.Flags \|= FlSHA1;
	449	return true;
	450	}
	451	/}}}/
	452	// CacheDB::GetSHA256 - Get the SHA256 hash /{{{/
	453	// ---------------------------------------------------------------------
	454	/* */
9209ec47	455	bool CacheDB::GetSHA256(bool const &GenOnly)
cde41ae8 MV	456	{
	457	// Try to read the control information out of the DB.
	458	if ((CurStat.Flags & FlSHA256) == FlSHA256)
	459	{
	460	if (GenOnly == true)
	461	return true;
	462
	463	SHA256Res = bytes2hex(CurStat.SHA256, sizeof(CurStat.SHA256));
	464	return true;
	465	}
	466
	467	Stats.SHA256Bytes += CurStat.FileSize;
	468
215b0faf	469	if (OpenFile() == false)
cde41ae8	470	return false;
215b0faf	471
cde41ae8	472	SHA256Summation SHA256;
109eb151	473	if (Fd->Seek(0) == false \|\| SHA256.AddFD(*Fd, CurStat.FileSize) == false)
cde41ae8 MV	474	return false;
	475
	476	SHA256Res = SHA256.Result();
	477	hex2bytes(CurStat.SHA256, SHA256Res.data(), sizeof(CurStat.SHA256));
	478	CurStat.Flags \|= FlSHA256;
	479	return true;
	480	}
	481	/}}}/
9a961efc MV	482	// CacheDB::GetSHA256 - Get the SHA256 hash /{{{/
	483	// ---------------------------------------------------------------------
	484	/* */
	485	bool CacheDB::GetSHA512(bool const &GenOnly)
	486	{
	487	// Try to read the control information out of the DB.
	488	if ((CurStat.Flags & FlSHA512) == FlSHA512)
	489	{
	490	if (GenOnly == true)
	491	return true;
	492
	493	SHA512Res = bytes2hex(CurStat.SHA512, sizeof(CurStat.SHA512));
	494	return true;
	495	}
	496
	497	Stats.SHA512Bytes += CurStat.FileSize;
	498
215b0faf	499	if (OpenFile() == false)
9a961efc	500	return false;
215b0faf	501
9a961efc	502	SHA512Summation SHA512;
109eb151	503	if (Fd->Seek(0) == false \|\| SHA512.AddFD(*Fd, CurStat.FileSize) == false)
9a961efc MV	504	return false;
	505
	506	SHA512Res = SHA512.Result();
	507	hex2bytes(CurStat.SHA512, SHA512Res.data(), sizeof(CurStat.SHA512));
	508	CurStat.Flags \|= FlSHA512;
	509	return true;
	510	}
	511	/}}}/
b2e465d6 AL	512	// CacheDB::Finish - Write back the cache structure /{{{/
	513	// ---------------------------------------------------------------------
	514	/* */
	515	bool CacheDB::Finish()
	516	{
	517	// Optimize away some writes.
	518	if (CurStat.Flags == OldStat.Flags &&
9bfe66dc	519	CurStat.mtime == OldStat.mtime)
b2e465d6	520	return true;
cf6bbca0	521
b2e465d6 AL	522	// Write the stat information
b2e465d6 AL	523	CurStat.Flags = htonl(CurStat.Flags);
cde41ae8	524	CurStat.FileSize = htonl(CurStat.FileSize);
37497bd5	525	InitQueryStats();
b2e465d6 AL	526	Put(&CurStat,sizeof(CurStat));
b2e465d6 AL	527	CurStat.Flags = ntohl(CurStat.Flags);
cde41ae8 MV	528	CurStat.FileSize = ntohl(CurStat.FileSize);
cde41ae8 MV	529
b2e465d6 AL	530	return true;
	531	}
	532	/}}}/
	533	// CacheDB::Clean - Clean the Database /{{{/
	534	// ---------------------------------------------------------------------
	535	/* Tidy the database by removing files that no longer exist at all. */
	536	bool CacheDB::Clean()
	537	{
	538	if (DBLoaded == false)
	539	return true;
	540
	541	/* I'm not sure what VERSION_MINOR should be here.. 2.4.14 certainly
	542	needs the lower one and 2.7.7 needs the upper.. */
b2e465d6	543	DBC *Cursor;
c9569a1e	544	if ((errno = Dbp->cursor(Dbp, NULL, &Cursor, 0)) != 0)
dc738e7a	545	return _error->Error(_("Unable to get a cursor"));
b2e465d6 AL	546
	547	DBT Key;
	548	DBT Data;
	549	memset(&Key,0,sizeof(Key));
	550	memset(&Data,0,sizeof(Data));
	551	while ((errno = Cursor->c_get(Cursor,&Key,&Data,DB_NEXT)) == 0)
	552	{
592b401a MV	553	const char Colon = (char)memrchr(Key.data, ':', Key.size);
592b401a MV	554	if (Colon)
b2e465d6	555	{
592b401a MV	556	if (stringcmp(Colon + 1, (char *)Key.data+Key.size,"st") == 0 \|\|
592b401a MV	557	stringcmp(Colon + 1, (char *)Key.data+Key.size,"cl") == 0 \|\|
53ba4e2c	558	stringcmp(Colon + 1, (char *)Key.data+Key.size,"cs") == 0 \|\|
592b401a	559	stringcmp(Colon + 1, (char *)Key.data+Key.size,"cn") == 0)
b2e465d6	560	{
53ba4e2c MV	561	std::string FileName = std::string((const char *)Key.data,Colon);
	562	if (FileExists(FileName) == true) {
	563	continue;
	564	}
b2e465d6 AL	565	}
b2e465d6 AL	566	}
b2e465d6 AL	567	Cursor->c_del(Cursor,0);
b2e465d6 AL	568	}
53ba4e2c MV	569	int res = Dbp->compact(Dbp, NULL, NULL, NULL, NULL, DB_FREE_SPACE, NULL);
	570	if (res < 0)
	571	_error->Warning("compact failed with result %i", res);
	572
	573	if(_config->FindB("Debug::APT::FTPArchive::Clean", false) == true)
	574	Dbp->stat_print(Dbp, 0);
	575
b2e465d6 AL	576
	577	return true;
	578	}
	579	/}}}/