[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()
{
   // its open already
   if(Fd && Fd->Name() == this->FileName)
      return true;

   // a different file is open, close it first
   if(Fd && Fd->Name() != this->FileName)
      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()
{
   // debfile is already open
   if(DebFile && &DebFile->GetFile() == Fd)
      return true;

   // a different debfile is open, close it first
   if(DebFile && &DebFile->GetFile() != Fd)
      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	{
215b0faf MV	100	// its open already
	101	if(Fd && Fd->Name() == this->FileName)
	102	return true;
	103
	104	// a different file is open, close it first
	105	if(Fd && Fd->Name() != this->FileName)
	106	CloseFile();
	107
	108	// open a new file
	109	Fd = new FileFd(FileName,FileFd::ReadOnly);
	110	if (_error->PendingError() == true)
	111	{
	112	CloseFile();
	113	return false;
	114	}
	115	return true;
cde41ae8 MV	116	}
cde41ae8 MV	117	/}}}/
215b0faf	118	// CacheDB::CloseFile - Close the file /{{{/
ce928105 MV	119	void CacheDB::CloseFile()
ce928105 MV	120	{
215b0faf MV	121	if(Fd != NULL)
	122	{
	123	delete Fd;
	124	Fd = NULL;
	125	}
ce928105	126	}
215b0faf MV	127	/}}}/
215b0faf MV	128	// CacheDB::OpenDebFile - Open a debfile /{{{/
ce928105 MV	129	bool CacheDB::OpenDebFile()
ce928105 MV	130	{
215b0faf MV	131	// debfile is already open
	132	if(DebFile && &DebFile->GetFile() == Fd)
	133	return true;
	134
	135	// a different debfile is open, close it first
	136	if(DebFile && &DebFile->GetFile() != Fd)
	137	CloseDebFile();
	138
	139	// first open the fd, then pass it to the debDebFile
	140	if(OpenFile() == false)
	141	return false;
ce928105 MV	142	DebFile = new debDebFile(*Fd);
	143	if (_error->PendingError() == true)
	144	return false;
	145	return true;
	146	}
215b0faf MV	147	/}}}/
215b0faf MV	148	// CacheDB::CloseDebFile - Close a debfile again /{{{/
ce928105 MV	149	void CacheDB::CloseDebFile()
ce928105 MV	150	{
215b0faf	151	CloseFile();
ce928105	152
215b0faf MV	153	if(DebFile != NULL)
	154	{
	155	delete DebFile;
	156	DebFile = NULL;
	157	}
	158	}
	159	/}}}/
cde41ae8 MV	160	// CacheDB::GetFileStat - Get stats from the file /{{{/
	161	// ---------------------------------------------------------------------
	162	/* This gets the size from the database if it's there. If we need
	163	* to look at the file, also get the mtime from the file. */
ff574e76	164	bool CacheDB::GetFileStat(bool const &doStat)
cde41ae8	165	{
215b0faf MV	166	if ((CurStat.Flags & FlSize) == FlSize && doStat == false)
	167	return true;
	168
	169	/* Get it from the file. */
	170	if (OpenFile() == false)
	171	return false;
	172
	173	// Stat the file
	174	struct stat St;
	175	if (fstat(Fd->Fd(),&St) != 0)
	176	{
	177	CloseFile();
	178	return _error->Errno("fstat",
	179	_("Failed to stat %s"),FileName.c_str());
	180	}
	181	CurStat.FileSize = St.st_size;
	182	CurStat.mtime = htonl(St.st_mtime);
	183	CurStat.Flags \|= FlSize;
	184
	185	return true;
cde41ae8 MV	186	}
	187	/}}}/
	188	// CacheDB::GetCurStat - Set the CurStat variable. /{{{/
	189	// ---------------------------------------------------------------------
	190	/* Sets the CurStat variable. Either to 0 if no database is used
	191	* or to the value in the database if one is used */
	192	bool CacheDB::GetCurStat()
b2e465d6	193	{
b2e465d6 AL	194	memset(&CurStat,0,sizeof(CurStat));
b2e465d6 AL	195
215b0faf MV	196	if (DBLoaded)
	197	{
	198	/* First see if there is anything about it
	199	in the database */
	200
	201	/* Get the flags (and mtime) */
37497bd5	202	InitQueryStats();
215b0faf MV	203	// Ensure alignment of the returned structure
	204	Data.data = &CurStat;
	205	Data.ulen = sizeof(CurStat);
	206	Data.flags = DB_DBT_USERMEM;
	207	if (Get() == false)
b2e465d6	208	{
b2e465d6	209	CurStat.Flags = 0;
b2e465d6	210	}
215b0faf MV	211	CurStat.Flags = ntohl(CurStat.Flags);
215b0faf MV	212	CurStat.FileSize = ntohl(CurStat.FileSize);
b2e465d6	213	}
215b0faf	214	return true;
cde41ae8 MV	215	}
	216	/}}}/
	217	// CacheDB::GetFileInfo - Get all the info about the file /{{{/
	218	// ---------------------------------------------------------------------
ce928105 MV	219	bool CacheDB::GetFileInfo(std::string const &FileName, bool const &DoControl,
	220	bool const &DoContents,
	221	bool const &GenContentsOnly,
	222	bool const &DoSource,
	223	bool const &DoMD5, bool const &DoSHA1,
	224	bool const &DoSHA256, bool const &DoSHA512,
9a961efc	225	bool const &checkMtime)
cde41ae8	226	{
ce928105 MV	227	bool result = true;
ce928105 MV	228	this->FileName = FileName;
cde41ae8	229
ce928105	230	if (GetCurStat() == false)
ce928105	231	return false;
b2e465d6	232	OldStat = CurStat;
ff574e76	233
ce928105	234	if (GetFileStat(checkMtime) == false)
ce928105	235	return false;
cde41ae8	236
215b0faf MV	237	/* if mtime changed, update CurStat from disk */
	238	if (checkMtime == true && OldStat.mtime != CurStat.mtime)
	239	CurStat.Flags = FlSize;
	240
	241	Stats.Bytes += CurStat.FileSize;
	242	Stats.Packages++;
	243
	244	if ((DoControl && LoadControl() == false)
	245	\|\| (DoContents && LoadContents(GenContentsOnly) == false)
	246	\|\| (DoSource && LoadSource() == false)
	247	\|\| (DoMD5 && GetMD5(false) == false)
	248	\|\| (DoSHA1 && GetSHA1(false) == false)
	249	\|\| (DoSHA256 && GetSHA256(false) == false)
	250	\|\| (DoSHA512 && GetSHA512(false) == false) )
	251	{
	252	result = false;
	253	}
ce928105	254
215b0faf	255	return result;
ce928105 MV	256	}
	257	/}}}/
	258
	259	bool CacheDB::LoadSource()
	260	{
	261	// Try to read the control information out of the DB.
	262	if ((CurStat.Flags & FlSource) == FlSource)
	263	{
	264	// Lookup the control information
37497bd5	265	InitQuerySource();
ce928105	266	if (Get() == true && Dsc.TakeDsc(Data.data, Data.size) == true)
53ba4e2c	267	{
ce928105	268	return true;
53ba4e2c	269	}
ce928105 MV	270	CurStat.Flags &= ~FlSource;
ce928105 MV	271	}
215b0faf	272	if (OpenFile() == false)
ce928105	273	return false;
ce928105	274
ce928105 MV	275	Stats.Misses++;
	276	if (Dsc.Read(FileName) == false)
	277	return false;
cde41ae8	278
ce928105 MV	279	if (Dsc.Data == 0)
	280	return _error->Error(_("Failed to read .dsc"));
	281
	282	// Write back the control information
37497bd5	283	InitQuerySource();
ce928105 MV	284	if (Put(Dsc.Data, Dsc.Length) == true)
ce928105 MV	285	CurStat.Flags \|= FlSource;
cde41ae8	286
b2e465d6 AL	287	return true;
b2e465d6 AL	288	}
ce928105	289
b2e465d6 AL	290	// CacheDB::LoadControl - Load Control information /{{{/
	291	// ---------------------------------------------------------------------
	292	/* */
	293	bool CacheDB::LoadControl()
	294	{
	295	// Try to read the control information out of the DB.
	296	if ((CurStat.Flags & FlControl) == FlControl)
	297	{
	298	// Lookup the control information
37497bd5	299	InitQueryControl();
b2e465d6 AL	300	if (Get() == true && Control.TakeControl(Data.data,Data.size) == true)
	301	return true;
	302	CurStat.Flags &= ~FlControl;
	303	}
	304
215b0faf	305	if(OpenDebFile() == false)
cde41ae8	306	return false;
b2e465d6 AL	307
	308	Stats.Misses++;
	309	if (Control.Read(*DebFile) == false)
	310	return false;
	311
	312	if (Control.Control == 0)
dc738e7a	313	return _error->Error(_("Archive has no control record"));
b2e465d6 AL	314
b2e465d6 AL	315	// Write back the control information
37497bd5	316	InitQueryControl();
b2e465d6 AL	317	if (Put(Control.Control,Control.Length) == true)
	318	CurStat.Flags \|= FlControl;
	319	return true;
	320	}
	321	/}}}/
	322	// CacheDB::LoadContents - Load the File Listing /{{{/
	323	// ---------------------------------------------------------------------
	324	/* */
9209ec47	325	bool CacheDB::LoadContents(bool const &GenOnly)
b2e465d6 AL	326	{
	327	// Try to read the control information out of the DB.
	328	if ((CurStat.Flags & FlContents) == FlContents)
	329	{
	330	if (GenOnly == true)
	331	return true;
	332
	333	// Lookup the contents information
37497bd5	334	InitQueryContent();
b2e465d6 AL	335	if (Get() == true)
	336	{
	337	if (Contents.TakeContents(Data.data,Data.size) == true)
	338	return true;
	339	}
	340
	341	CurStat.Flags &= ~FlContents;
	342	}
	343
215b0faf	344	if(OpenDebFile() == false)
cde41ae8	345	return false;
b2e465d6	346
0a3b93fc	347	Stats.Misses++;
b2e465d6 AL	348	if (Contents.Read(*DebFile) == false)
	349	return false;
	350
	351	// Write back the control information
37497bd5	352	InitQueryContent();
b2e465d6 AL	353	if (Put(Contents.Data,Contents.CurSize) == true)
	354	CurStat.Flags \|= FlContents;
	355	return true;
	356	}
	357	/}}}/
cde41ae8	358
8f3ba4e8	359	static std::string bytes2hex(uint8_t *bytes, size_t length) {
76ef756a	360	char buf[3];
0fffbc8c	361	std::string space;
76ef756a MV	362
	363	space.reserve(length*2 + 1);
	364	for (size_t i = 0; i < length; i++) {
	365	snprintf(buf, sizeof(buf), "%02x", bytes[i]);
	366	space.append(buf);
	367	}
	368	return space;
cde41ae8 MV	369	}
cde41ae8 MV	370
9209ec47	371	static inline unsigned char xdig2num(char const &dig) {
cde41ae8 MV	372	if (isdigit(dig)) return dig - '0';
	373	if ('a' <= dig && dig <= 'f') return dig - 'a' + 10;
	374	if ('A' <= dig && dig <= 'F') return dig - 'A' + 10;
	375	return 0;
	376	}
	377
	378	static void hex2bytes(uint8_t bytes, const char hex, int length) {
	379	while (length-- > 0) {
	380	*bytes = 0;
	381	if (isxdigit(hex[0]) && isxdigit(hex[1])) {
	382	bytes = xdig2num(hex[0]) 16 + xdig2num(hex[1]);
	383	hex += 2;
	384	}
	385	bytes++;
	386	}
	387	}
	388
b2e465d6 AL	389	// CacheDB::GetMD5 - Get the MD5 hash /{{{/
	390	// ---------------------------------------------------------------------
	391	/* */
9209ec47	392	bool CacheDB::GetMD5(bool const &GenOnly)
b2e465d6 AL	393	{
	394	// Try to read the control information out of the DB.
	395	if ((CurStat.Flags & FlMD5) == FlMD5)
	396	{
	397	if (GenOnly == true)
	398	return true;
	399
cde41ae8	400	MD5Res = bytes2hex(CurStat.MD5, sizeof(CurStat.MD5));
b2e465d6	401	return true;
215b0faf	402	}
b2e465d6	403
cde41ae8	404	Stats.MD5Bytes += CurStat.FileSize;
b2e465d6	405
215b0faf	406	if (OpenFile() == false)
cde41ae8	407	return false;
215b0faf	408
b2e465d6	409	MD5Summation MD5;
109eb151	410	if (Fd->Seek(0) == false \|\| MD5.AddFD(*Fd, CurStat.FileSize) == false)
b2e465d6 AL	411	return false;
	412
	413	MD5Res = MD5.Result();
cde41ae8	414	hex2bytes(CurStat.MD5, MD5Res.data(), sizeof(CurStat.MD5));
b2e465d6 AL	415	CurStat.Flags \|= FlMD5;
	416	return true;
	417	}
	418	/}}}/
cde41ae8 MV	419	// CacheDB::GetSHA1 - Get the SHA1 hash /{{{/
	420	// ---------------------------------------------------------------------
	421	/* */
9209ec47	422	bool CacheDB::GetSHA1(bool const &GenOnly)
cde41ae8 MV	423	{
	424	// Try to read the control information out of the DB.
	425	if ((CurStat.Flags & FlSHA1) == FlSHA1)
	426	{
	427	if (GenOnly == true)
	428	return true;
	429
	430	SHA1Res = bytes2hex(CurStat.SHA1, sizeof(CurStat.SHA1));
	431	return true;
	432	}
	433
	434	Stats.SHA1Bytes += CurStat.FileSize;
	435
215b0faf	436	if (OpenFile() == false)
cde41ae8	437	return false;
215b0faf	438
cde41ae8	439	SHA1Summation SHA1;
109eb151	440	if (Fd->Seek(0) == false \|\| SHA1.AddFD(*Fd, CurStat.FileSize) == false)
cde41ae8 MV	441	return false;
	442
	443	SHA1Res = SHA1.Result();
	444	hex2bytes(CurStat.SHA1, SHA1Res.data(), sizeof(CurStat.SHA1));
	445	CurStat.Flags \|= FlSHA1;
	446	return true;
	447	}
	448	/}}}/
	449	// CacheDB::GetSHA256 - Get the SHA256 hash /{{{/
	450	// ---------------------------------------------------------------------
	451	/* */
9209ec47	452	bool CacheDB::GetSHA256(bool const &GenOnly)
cde41ae8 MV	453	{
	454	// Try to read the control information out of the DB.
	455	if ((CurStat.Flags & FlSHA256) == FlSHA256)
	456	{
	457	if (GenOnly == true)
	458	return true;
	459
	460	SHA256Res = bytes2hex(CurStat.SHA256, sizeof(CurStat.SHA256));
	461	return true;
	462	}
	463
	464	Stats.SHA256Bytes += CurStat.FileSize;
	465
215b0faf	466	if (OpenFile() == false)
cde41ae8	467	return false;
215b0faf	468
cde41ae8	469	SHA256Summation SHA256;
109eb151	470	if (Fd->Seek(0) == false \|\| SHA256.AddFD(*Fd, CurStat.FileSize) == false)
cde41ae8 MV	471	return false;
	472
	473	SHA256Res = SHA256.Result();
	474	hex2bytes(CurStat.SHA256, SHA256Res.data(), sizeof(CurStat.SHA256));
	475	CurStat.Flags \|= FlSHA256;
	476	return true;
	477	}
	478	/}}}/
9a961efc MV	479	// CacheDB::GetSHA256 - Get the SHA256 hash /{{{/
	480	// ---------------------------------------------------------------------
	481	/* */
	482	bool CacheDB::GetSHA512(bool const &GenOnly)
	483	{
	484	// Try to read the control information out of the DB.
	485	if ((CurStat.Flags & FlSHA512) == FlSHA512)
	486	{
	487	if (GenOnly == true)
	488	return true;
	489
	490	SHA512Res = bytes2hex(CurStat.SHA512, sizeof(CurStat.SHA512));
	491	return true;
	492	}
	493
	494	Stats.SHA512Bytes += CurStat.FileSize;
	495
215b0faf	496	if (OpenFile() == false)
9a961efc	497	return false;
215b0faf	498
9a961efc	499	SHA512Summation SHA512;
109eb151	500	if (Fd->Seek(0) == false \|\| SHA512.AddFD(*Fd, CurStat.FileSize) == false)
9a961efc MV	501	return false;
	502
	503	SHA512Res = SHA512.Result();
	504	hex2bytes(CurStat.SHA512, SHA512Res.data(), sizeof(CurStat.SHA512));
	505	CurStat.Flags \|= FlSHA512;
	506	return true;
	507	}
	508	/}}}/
b2e465d6 AL	509	// CacheDB::Finish - Write back the cache structure /{{{/
	510	// ---------------------------------------------------------------------
	511	/* */
	512	bool CacheDB::Finish()
	513	{
	514	// Optimize away some writes.
	515	if (CurStat.Flags == OldStat.Flags &&
9bfe66dc	516	CurStat.mtime == OldStat.mtime)
b2e465d6	517	return true;
cf6bbca0	518
b2e465d6 AL	519	// Write the stat information
b2e465d6 AL	520	CurStat.Flags = htonl(CurStat.Flags);
cde41ae8	521	CurStat.FileSize = htonl(CurStat.FileSize);
37497bd5	522	InitQueryStats();
b2e465d6 AL	523	Put(&CurStat,sizeof(CurStat));
b2e465d6 AL	524	CurStat.Flags = ntohl(CurStat.Flags);
cde41ae8 MV	525	CurStat.FileSize = ntohl(CurStat.FileSize);
cde41ae8 MV	526
b2e465d6 AL	527	return true;
	528	}
	529	/}}}/
	530	// CacheDB::Clean - Clean the Database /{{{/
	531	// ---------------------------------------------------------------------
	532	/* Tidy the database by removing files that no longer exist at all. */
	533	bool CacheDB::Clean()
	534	{
	535	if (DBLoaded == false)
	536	return true;
	537
	538	/* I'm not sure what VERSION_MINOR should be here.. 2.4.14 certainly
	539	needs the lower one and 2.7.7 needs the upper.. */
b2e465d6	540	DBC *Cursor;
c9569a1e	541	if ((errno = Dbp->cursor(Dbp, NULL, &Cursor, 0)) != 0)
dc738e7a	542	return _error->Error(_("Unable to get a cursor"));
b2e465d6 AL	543
	544	DBT Key;
	545	DBT Data;
	546	memset(&Key,0,sizeof(Key));
	547	memset(&Data,0,sizeof(Data));
	548	while ((errno = Cursor->c_get(Cursor,&Key,&Data,DB_NEXT)) == 0)
	549	{
592b401a MV	550	const char Colon = (char)memrchr(Key.data, ':', Key.size);
592b401a MV	551	if (Colon)
b2e465d6	552	{
592b401a MV	553	if (stringcmp(Colon + 1, (char *)Key.data+Key.size,"st") == 0 \|\|
592b401a MV	554	stringcmp(Colon + 1, (char *)Key.data+Key.size,"cl") == 0 \|\|
53ba4e2c	555	stringcmp(Colon + 1, (char *)Key.data+Key.size,"cs") == 0 \|\|
592b401a	556	stringcmp(Colon + 1, (char *)Key.data+Key.size,"cn") == 0)
b2e465d6	557	{
53ba4e2c MV	558	std::string FileName = std::string((const char *)Key.data,Colon);
	559	if (FileExists(FileName) == true) {
	560	continue;
	561	}
b2e465d6 AL	562	}
b2e465d6 AL	563	}
b2e465d6 AL	564	Cursor->c_del(Cursor,0);
b2e465d6 AL	565	}
53ba4e2c MV	566	int res = Dbp->compact(Dbp, NULL, NULL, NULL, NULL, DB_FREE_SPACE, NULL);
	567	if (res < 0)
	568	_error->Warning("compact failed with result %i", res);
	569
	570	if(_config->FindB("Debug::APT::FTPArchive::Clean", false) == true)
	571	Dbp->stat_print(Dbp, 0);
	572
b2e465d6 AL	573
	574	return true;
	575	}
	576	/}}}/