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