[apt.git] / apt-pkg / acquire-worker.cc

// -*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
// $Id: acquire-worker.cc,v 1.34 2001/05/22 04:42:54 jgg Exp $
/* ######################################################################

   Acquire Worker 

   The worker process can startup either as a Configuration prober
   or as a queue runner. As a configuration prober it only reads the
   configuration message and 
   
   ##################################################################### */
									/*}}}*/
// Include Files							/*{{{*/
#include <config.h>

#include <apt-pkg/acquire-worker.h>
#include <apt-pkg/acquire-item.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/error.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/strutl.h>

#include <iostream>
#include <sstream>
#include <fstream>

#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <errno.h>

#include <apti18n.h>
									/*}}}*/

using namespace std;

// Worker::Worker - Constructor for Queue startup			/*{{{*/
// ---------------------------------------------------------------------
/* */
pkgAcquire::Worker::Worker(Queue *Q,MethodConfig *Cnf,
			   pkgAcquireStatus *Log) : Log(Log)
{
   OwnerQ = Q;
   Config = Cnf;
   Access = Cnf->Access;
   CurrentItem = 0;
   TotalSize = 0;
   CurrentSize = 0;
   
   Construct();   
}
									/*}}}*/
// Worker::Worker - Constructor for method config startup		/*{{{*/
// ---------------------------------------------------------------------
/* */
pkgAcquire::Worker::Worker(MethodConfig *Cnf)
{
   OwnerQ = 0;
   Config = Cnf;
   Access = Cnf->Access;
   CurrentItem = 0;
   TotalSize = 0;
   CurrentSize = 0;
   
   Construct();   
}
									/*}}}*/
// Worker::Construct - Constructor helper				/*{{{*/
// ---------------------------------------------------------------------
/* */
void pkgAcquire::Worker::Construct()
{
   NextQueue = 0;
   NextAcquire = 0;
   Process = -1;
   InFd = -1;
   OutFd = -1;
   OutReady = false;
   InReady = false;
   Debug = _config->FindB("Debug::pkgAcquire::Worker",false);
}
									/*}}}*/
// Worker::~Worker - Destructor						/*{{{*/
// ---------------------------------------------------------------------
/* */
pkgAcquire::Worker::~Worker()
{
   close(InFd);
   close(OutFd);
   
   if (Process > 0)
   {
      /* Closing of stdin is the signal to exit and die when the process
         indicates it needs cleanup */
      if (Config->NeedsCleanup == false)
	 kill(Process,SIGINT);
      ExecWait(Process,Access.c_str(),true);
   }   
}
									/*}}}*/
// Worker::Start - Start the worker process				/*{{{*/
// ---------------------------------------------------------------------
/* This forks the method and inits the communication channel */
bool pkgAcquire::Worker::Start()
{
   // Get the method path
   string Method = _config->FindDir("Dir::Bin::Methods") + Access;
   if (FileExists(Method) == false)
      return _error->Error(_("The method driver %s could not be found."),Method.c_str());

   if (Debug == true)
      clog << "Starting method '" << Method << '\'' << endl;

   // Create the pipes
   int Pipes[4] = {-1,-1,-1,-1};
   if (pipe(Pipes) != 0 || pipe(Pipes+2) != 0)
   {
      _error->Errno("pipe","Failed to create IPC pipe to subprocess");
      for (int I = 0; I != 4; I++)
	 close(Pipes[I]);
      return false;
   }
   for (int I = 0; I != 4; I++)
      SetCloseExec(Pipes[I],true);
   
   // Fork off the process
   Process = ExecFork();
   if (Process == 0)
   {
      // Setup the FDs
      dup2(Pipes[1],STDOUT_FILENO);
      dup2(Pipes[2],STDIN_FILENO);
      SetCloseExec(STDOUT_FILENO,false);
      SetCloseExec(STDIN_FILENO,false);      
      SetCloseExec(STDERR_FILENO,false);
      
      const char *Args[2];
      Args[0] = Method.c_str();
      Args[1] = 0;
      execv(Args[0],(char **)Args);
      cerr << "Failed to exec method " << Args[0] << endl;
      _exit(100);
   }

   // Fix up our FDs
   InFd = Pipes[0];
   OutFd = Pipes[3];
   SetNonBlock(Pipes[0],true);
   SetNonBlock(Pipes[3],true);
   close(Pipes[1]);
   close(Pipes[2]);
   OutReady = false;
   InReady = true;
   
   // Read the configuration data
   if (WaitFd(InFd) == false ||
       ReadMessages() == false)
      return _error->Error(_("Method %s did not start correctly"),Method.c_str());

   RunMessages();
   if (OwnerQ != 0)
      SendConfiguration();
   
   return true;
}
									/*}}}*/
// Worker::ReadMessages - Read all pending messages into the list	/*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgAcquire::Worker::ReadMessages()
{
   if (::ReadMessages(InFd,MessageQueue) == false)
      return MethodFailure();
   return true;
}
									/*}}}*/
// Worker::RunMessage - Empty the message queue				/*{{{*/
// ---------------------------------------------------------------------
/* This takes the messages from the message queue and runs them through
   the parsers in order. */
bool pkgAcquire::Worker::RunMessages()
{
   while (MessageQueue.empty() == false)
   {
      string Message = MessageQueue.front();
      MessageQueue.erase(MessageQueue.begin());

      if (Debug == true)
	 clog << " <- " << Access << ':' << QuoteString(Message,"\n") << endl;
      
      // Fetch the message number
      char *End;
      int Number = strtol(Message.c_str(),&End,10);
      if (End == Message.c_str())
	 return _error->Error("Invalid message from method %s: %s",Access.c_str(),Message.c_str());

      string URI = LookupTag(Message,"URI");
      pkgAcquire::Queue::QItem *Itm = 0;
      if (URI.empty() == false)
	 Itm = OwnerQ->FindItem(URI,this);

      // update used mirror
      string UsedMirror = LookupTag(Message,"UsedMirror", "");
      if (!UsedMirror.empty() && 
          Itm && 
          Itm->Description.find(" ") != string::npos) 
      {
         Itm->Description.replace(0, Itm->Description.find(" "), UsedMirror);
         // FIXME: will we need this as well?
         //Itm->ShortDesc = UsedMirror;
      }
      
      // Determine the message number and dispatch
      switch (Number)
      {
	 // 100 Capabilities
	 case 100:
	 if (Capabilities(Message) == false)
	    return _error->Error("Unable to process Capabilities message from %s",Access.c_str());
	 break;
	 
	 // 101 Log
	 case 101:
	 if (Debug == true)
	    clog << " <- (log) " << LookupTag(Message,"Message") << endl;
	 break;
	 
	 // 102 Status
	 case 102:
	 Status = LookupTag(Message,"Message");
	 break;
	    
         // 103 Redirect
         case 103:
         {
            if (Itm == 0)
            {
               _error->Error("Method gave invalid 103 Redirect message");
               break;
            }
 
            string NewURI = LookupTag(Message,"New-URI",URI.c_str());
            Itm->URI = NewURI;

	    ItemDone();

	    pkgAcquire::Item *Owner = Itm->Owner;
	    pkgAcquire::ItemDesc Desc = *Itm;

	    // Change the status so that it can be dequeued
	    Owner->Status = pkgAcquire::Item::StatIdle;
	    // Mark the item as done (taking care of all queues)
	    // and then put it in the main queue again
	    OwnerQ->ItemDone(Itm);
	    OwnerQ->Owner->Enqueue(Desc);

	    if (Log != 0)
	       Log->Done(Desc);
            break;
         }
   
	 // 200 URI Start
	 case 200:
	 {
	    if (Itm == 0)
	    {
	       _error->Error("Method gave invalid 200 URI Start message");
	       break;
	    }
	    
	    CurrentItem = Itm;
	    CurrentSize = 0;
	    TotalSize = strtoull(LookupTag(Message,"Size","0").c_str(), NULL, 10);
	    ResumePoint = strtoull(LookupTag(Message,"Resume-Point","0").c_str(), NULL, 10);
	    Itm->Owner->Start(Message,strtoull(LookupTag(Message,"Size","0").c_str(), NULL, 10));

	    // Display update before completion
	    if (Log != 0 && Log->MorePulses == true)
	       Log->Pulse(Itm->Owner->GetOwner());
	    
	    if (Log != 0)
	       Log->Fetch(*Itm);

	    break;
	 }
	 
	 // 201 URI Done
	 case 201:
	 {
	    if (Itm == 0)
	    {
	       _error->Error("Method gave invalid 201 URI Done message");
	       break;
	    }
	    
	    pkgAcquire::Item *Owner = Itm->Owner;
	    pkgAcquire::ItemDesc Desc = *Itm;
	    
	    // Display update before completion
	    if (Log != 0 && Log->MorePulses == true)
	       Log->Pulse(Owner->GetOwner());
	    
	    OwnerQ->ItemDone(Itm);
	    unsigned long long const ServerSize = strtoull(LookupTag(Message,"Size","0").c_str(), NULL, 10);
            bool isHit = StringToBool(LookupTag(Message,"IMS-Hit"),false) ||
                         StringToBool(LookupTag(Message,"Alt-IMS-Hit"),false);
            // Using the https method the server might return 200, but the
            // If-Modified-Since condition is not satsified, libcurl will
            // discard the download. In this case, however, TotalSize will be
            // set to the actual size of the file, while ServerSize will be set
            // to 0. Therefore, if the item is marked as a hit and the
            // downloaded size (ServerSize) is 0, we ignore TotalSize.
	    if (TotalSize != 0 && (!isHit || ServerSize != 0) && ServerSize != TotalSize)
	       _error->Warning("Size of file %s is not what the server reported %s %llu",
			       Owner->DestFile.c_str(), LookupTag(Message,"Size","0").c_str(),TotalSize);

	    // see if there is a hash to verify
	    string RecivedHash;
	    HashString expectedHash(Owner->HashSum());
	    if(!expectedHash.empty()) 
	    {
	       string hashTag = expectedHash.HashType()+"-Hash";
	       string hashSum = LookupTag(Message, hashTag.c_str());
	       if(!hashSum.empty())
		  RecivedHash = expectedHash.HashType() + ":" + hashSum;
	       if(_config->FindB("Debug::pkgAcquire::Auth", false) == true)
	       {
		  clog << "201 URI Done: " << Owner->DescURI() << endl
		       << "RecivedHash: " << RecivedHash << endl
		       << "ExpectedHash: " << expectedHash.toStr() 
		       << endl << endl;
	       }
	    }
	    Owner->Done(Message, ServerSize, RecivedHash.c_str(), Config);
	    ItemDone();
	    
	    // Log that we are done
	    if (Log != 0)
	    {
	       if (isHit)
	       {
		  /* Hide 'hits' for local only sources - we also manage to
		     hide gets */
		  if (Config->LocalOnly == false)
		     Log->IMSHit(Desc);
	       }	       
	       else
		  Log->Done(Desc);
	    }
	    break;
	 }	 
	 
	 // 400 URI Failure
	 case 400:
	 {
	    if (Itm == 0)
	    {
	       _error->Error("Method gave invalid 400 URI Failure message");
	       break;
	    }

	    // Display update before completion
	    if (Log != 0 && Log->MorePulses == true)
	       Log->Pulse(Itm->Owner->GetOwner());
	    
	    pkgAcquire::Item *Owner = Itm->Owner;
	    pkgAcquire::ItemDesc Desc = *Itm;
	    OwnerQ->ItemDone(Itm);

	    // set some status
	    if(LookupTag(Message,"FailReason") == "Timeout" || 
	       LookupTag(Message,"FailReason") == "TmpResolveFailure" ||
	       LookupTag(Message,"FailReason") == "ResolveFailure" ||
	       LookupTag(Message,"FailReason") == "ConnectionRefused") 
	       Owner->Status = pkgAcquire::Item::StatTransientNetworkError;

	    Owner->Failed(Message,Config);
	    ItemDone();

	    if (Log != 0)
	       Log->Fail(Desc);

	    break;
	 }	 
	 
	 // 401 General Failure
	 case 401:
	 _error->Error("Method %s General failure: %s",Access.c_str(),LookupTag(Message,"Message").c_str());
	 break;
	 
	 // 403 Media Change
	 case 403:
	 MediaChange(Message); 
	 break;
      }      
   }
   return true;
}
									/*}}}*/
// Worker::Capabilities - 100 Capabilities handler			/*{{{*/
// ---------------------------------------------------------------------
/* This parses the capabilities message and dumps it into the configuration
   structure. */
bool pkgAcquire::Worker::Capabilities(string Message)
{
   if (Config == 0)
      return true;
   
   Config->Version = LookupTag(Message,"Version");
   Config->SingleInstance = StringToBool(LookupTag(Message,"Single-Instance"),false);
   Config->Pipeline = StringToBool(LookupTag(Message,"Pipeline"),false);
   Config->SendConfig = StringToBool(LookupTag(Message,"Send-Config"),false);
   Config->LocalOnly = StringToBool(LookupTag(Message,"Local-Only"),false);
   Config->NeedsCleanup = StringToBool(LookupTag(Message,"Needs-Cleanup"),false);
   Config->Removable = StringToBool(LookupTag(Message,"Removable"),false);

   // Some debug text
   if (Debug == true)
   {
      clog << "Configured access method " << Config->Access << endl;
      clog << "Version:" << Config->Version <<
	      " SingleInstance:" << Config->SingleInstance <<
	      " Pipeline:" << Config->Pipeline << 
	      " SendConfig:" << Config->SendConfig << 
	      " LocalOnly: " << Config->LocalOnly << 
	      " NeedsCleanup: " << Config->NeedsCleanup << 
	      " Removable: " << Config->Removable << endl;
   }
   
   return true;
}
									/*}}}*/
// Worker::MediaChange - Request a media change				/*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgAcquire::Worker::MediaChange(string Message)
{
   int status_fd = _config->FindI("APT::Status-Fd",-1);
   if(status_fd > 0) 
   {
      string Media = LookupTag(Message,"Media");
      string Drive = LookupTag(Message,"Drive"); 
      ostringstream msg,status;
      ioprintf(msg,_("Please insert the disc labeled: "
		     "'%s' "
		     "in the drive '%s' and press enter."),
	       Media.c_str(),Drive.c_str());
      status << "media-change: "  // message
	     << Media  << ":"     // media
	     << Drive  << ":"     // drive
	     << msg.str()         // l10n message
	     << endl;

      std::string const dlstatus = status.str();
      FileFd::Write(status_fd, dlstatus.c_str(), dlstatus.size());
   }

   if (Log == 0 || Log->MediaChange(LookupTag(Message,"Media"),
				    LookupTag(Message,"Drive")) == false)
   {
      char S[300];
      snprintf(S,sizeof(S),"603 Media Changed\nFailed: true\n\n");
      if (Debug == true)
	 clog << " -> " << Access << ':' << QuoteString(S,"\n") << endl;
      OutQueue += S;
      OutReady = true;
      return true;
   }

   char S[300];
   snprintf(S,sizeof(S),"603 Media Changed\n\n");
   if (Debug == true)
      clog << " -> " << Access << ':' << QuoteString(S,"\n") << endl;
   OutQueue += S;
   OutReady = true;
   return true;
}
									/*}}}*/
// Worker::SendConfiguration - Send the config to the method		/*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgAcquire::Worker::SendConfiguration()
{
   if (Config->SendConfig == false)
      return true;

   if (OutFd == -1)
      return false;

   /* Write out all of the configuration directives by walking the
      configuration tree */
   std::ostringstream Message;
   Message << "601 Configuration\n";
   _config->Dump(Message, NULL, "Config-Item: %F=%V\n", false);
   Message << '\n';

   if (Debug == true)
      clog << " -> " << Access << ':' << QuoteString(Message.str(),"\n") << endl;
   OutQueue += Message.str();
   OutReady = true;

   return true;
}
									/*}}}*/
// Worker::QueueItem - Add an item to the outbound queue		/*{{{*/
// ---------------------------------------------------------------------
/* Send a URI Acquire message to the method */
bool pkgAcquire::Worker::QueueItem(pkgAcquire::Queue::QItem *Item)
{
   if (OutFd == -1)
      return false;
   
   string Message = "600 URI Acquire\n";
   Message.reserve(300);
   Message += "URI: " + Item->URI;
   Message += "\nFilename: " + Item->Owner->DestFile;
   Message += Item->Owner->Custom600Headers();
   Message += "\n\n";
   
   if (Debug == true)
      clog << " -> " << Access << ':' << QuoteString(Message,"\n") << endl;
   OutQueue += Message;
   OutReady = true;
   
   return true;
}
									/*}}}*/
// Worker::OutFdRead - Out bound FD is ready				/*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgAcquire::Worker::OutFdReady()
{
   int Res;
   do
   {
      Res = write(OutFd,OutQueue.c_str(),OutQueue.length());
   }
   while (Res < 0 && errno == EINTR);

   if (Res <= 0)
      return MethodFailure();

   OutQueue.erase(0,Res);
   if (OutQueue.empty() == true)
      OutReady = false;
   
   return true;
}
									/*}}}*/
// Worker::InFdRead - In bound FD is ready				/*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgAcquire::Worker::InFdReady()
{
   if (ReadMessages() == false)
      return false;
   RunMessages();
   return true;
}
									/*}}}*/
// Worker::MethodFailure - Called when the method fails			/*{{{*/
// ---------------------------------------------------------------------
/* This is called when the method is belived to have failed, probably because
   read returned -1. */
bool pkgAcquire::Worker::MethodFailure()
{
   _error->Error("Method %s has died unexpectedly!",Access.c_str());
   
   // do not reap the child here to show meaningfull error to the user
   ExecWait(Process,Access.c_str(),false);
   Process = -1;
   close(InFd);
   close(OutFd);
   InFd = -1;
   OutFd = -1;
   OutReady = false;
   InReady = false;
   OutQueue = string();
   MessageQueue.erase(MessageQueue.begin(),MessageQueue.end());
   
   return false;
}
									/*}}}*/
// Worker::Pulse - Called periodically 					/*{{{*/
// ---------------------------------------------------------------------
/* */
void pkgAcquire::Worker::Pulse()
{
   if (CurrentItem == 0)
      return;
 
   struct stat Buf;
   if (stat(CurrentItem->Owner->DestFile.c_str(),&Buf) != 0)
      return;
   CurrentSize = Buf.st_size;
   
   // Hmm? Should not happen...
   if (CurrentSize > TotalSize && TotalSize != 0)
      TotalSize = CurrentSize;
}
									/*}}}*/
// Worker::ItemDone - Called when the current item is finished		/*{{{*/
// ---------------------------------------------------------------------
/* */
void pkgAcquire::Worker::ItemDone()
{
   CurrentItem = 0;
   CurrentSize = 0;
   TotalSize = 0;
   Status = string();
}
									/*}}}*/
Commit	Line	Data
0118833a AL	1	// -- mode: cpp; mode: fold --
0118833a AL	2	// Description /{{{/
24a0d63a	3	// $Id: acquire-worker.cc,v 1.34 2001/05/22 04:42:54 jgg Exp $
0118833a AL	4	/* ######################################################################
	5
	6	Acquire Worker
	7
3b5421b4 AL	8	The worker process can startup either as a Configuration prober
	9	or as a queue runner. As a configuration prober it only reads the
	10	configuration message and
	11
0118833a AL	12	##################################################################### */
	13	/}}}/
	14	// Include Files /{{{/
ea542140 DK	15	#include <config.h>
ea542140 DK	16
0118833a	17	#include <apt-pkg/acquire-worker.h>
0a8a80e5	18	#include <apt-pkg/acquire-item.h>
3b5421b4 AL	19	#include <apt-pkg/configuration.h>
	20	#include <apt-pkg/error.h>
	21	#include <apt-pkg/fileutl.h>
cdcc6d34	22	#include <apt-pkg/strutl.h>
3b5421b4	23
24a0d63a	24	#include <iostream>
80a26ed1	25	#include <sstream>
24a0d63a	26	#include <fstream>
ea542140	27
8267fe24	28	#include <sys/stat.h>
3b5421b4	29	#include <unistd.h>
b0db36b1	30	#include <fcntl.h>
3b5421b4	31	#include <signal.h>
542ec555	32	#include <stdio.h>
b0db36b1	33	#include <errno.h>
ea542140 DK	34
ea542140 DK	35	#include <apti18n.h>
3b5421b4 AL	36	/}}}/
3b5421b4 AL	37
24a0d63a AL	38	using namespace std;
24a0d63a AL	39
3b5421b4 AL	40	// Worker::Worker - Constructor for Queue startup /{{{/
	41	// ---------------------------------------------------------------------
	42	/* */
8267fe24 AL	43	pkgAcquire::Worker::Worker(Queue Q,MethodConfig Cnf,
8267fe24 AL	44	pkgAcquireStatus *Log) : Log(Log)
3b5421b4 AL	45	{
3b5421b4 AL	46	OwnerQ = Q;
0a8a80e5 AL	47	Config = Cnf;
	48	Access = Cnf->Access;
	49	CurrentItem = 0;
18ef0a78 AL	50	TotalSize = 0;
	51	CurrentSize = 0;
	52
3b5421b4 AL	53	Construct();
	54	}
	55	/}}}/
	56	// Worker::Worker - Constructor for method config startup /{{{/
	57	// ---------------------------------------------------------------------
	58	/* */
	59	pkgAcquire::Worker::Worker(MethodConfig *Cnf)
	60	{
	61	OwnerQ = 0;
	62	Config = Cnf;
	63	Access = Cnf->Access;
0a8a80e5	64	CurrentItem = 0;
18ef0a78 AL	65	TotalSize = 0;
18ef0a78 AL	66	CurrentSize = 0;
0a8a80e5	67
3b5421b4 AL	68	Construct();
	69	}
	70	/}}}/
	71	// Worker::Construct - Constructor helper /{{{/
	72	// ---------------------------------------------------------------------
	73	/* */
	74	void pkgAcquire::Worker::Construct()
	75	{
0a8a80e5 AL	76	NextQueue = 0;
0a8a80e5 AL	77	NextAcquire = 0;
3b5421b4 AL	78	Process = -1;
	79	InFd = -1;
	80	OutFd = -1;
0a8a80e5 AL	81	OutReady = false;
0a8a80e5 AL	82	InReady = false;
3b5421b4 AL	83	Debug = _config->FindB("Debug::pkgAcquire::Worker",false);
	84	}
	85	/}}}/
	86	// Worker::~Worker - Destructor /{{{/
	87	// ---------------------------------------------------------------------
	88	/* */
	89	pkgAcquire::Worker::~Worker()
	90	{
	91	close(InFd);
	92	close(OutFd);
	93
	94	if (Process > 0)
0a8a80e5	95	{
8e5fc8f5 AL	96	/* Closing of stdin is the signal to exit and die when the process
	97	indicates it needs cleanup */
	98	if (Config->NeedsCleanup == false)
	99	kill(Process,SIGINT);
ddc1d8d0	100	ExecWait(Process,Access.c_str(),true);
0a8a80e5	101	}
3b5421b4 AL	102	}
	103	/}}}/
	104	// Worker::Start - Start the worker process /{{{/
	105	// ---------------------------------------------------------------------
	106	/* This forks the method and inits the communication channel */
	107	bool pkgAcquire::Worker::Start()
	108	{
	109	// Get the method path
	110	string Method = _config->FindDir("Dir::Bin::Methods") + Access;
	111	if (FileExists(Method) == false)
b2e465d6	112	return _error->Error(_("The method driver %s could not be found."),Method.c_str());
3b5421b4 AL	113
	114	if (Debug == true)
	115	clog << "Starting method '" << Method << '\'' << endl;
	116
	117	// Create the pipes
	118	int Pipes[4] = {-1,-1,-1,-1};
	119	if (pipe(Pipes) != 0 \|\| pipe(Pipes+2) != 0)
	120	{
	121	_error->Errno("pipe","Failed to create IPC pipe to subprocess");
	122	for (int I = 0; I != 4; I++)
	123	close(Pipes[I]);
	124	return false;
	125	}
8b89e57f	126	for (int I = 0; I != 4; I++)
4490f2de	127	SetCloseExec(Pipes[I],true);
8b89e57f	128
3b5421b4	129	// Fork off the process
54676e1a	130	Process = ExecFork();
3b5421b4 AL	131	if (Process == 0)
	132	{
	133	// Setup the FDs
	134	dup2(Pipes[1],STDOUT_FILENO);
	135	dup2(Pipes[2],STDIN_FILENO);
3b5421b4 AL	136	SetCloseExec(STDOUT_FILENO,false);
	137	SetCloseExec(STDIN_FILENO,false);
	138	SetCloseExec(STDERR_FILENO,false);
	139
	140	const char *Args[2];
	141	Args[0] = Method.c_str();
	142	Args[1] = 0;
	143	execv(Args[0],(char **)Args);
	144	cerr << "Failed to exec method " << Args[0] << endl;
0dbb95d8	145	_exit(100);
3b5421b4 AL	146	}
	147
	148	// Fix up our FDs
	149	InFd = Pipes[0];
	150	OutFd = Pipes[3];
	151	SetNonBlock(Pipes[0],true);
	152	SetNonBlock(Pipes[3],true);
	153	close(Pipes[1]);
	154	close(Pipes[2]);
0a8a80e5 AL	155	OutReady = false;
0a8a80e5 AL	156	InReady = true;
3b5421b4 AL	157
	158	// Read the configuration data
	159	if (WaitFd(InFd) == false \|\|
	160	ReadMessages() == false)
b2e465d6	161	return _error->Error(_("Method %s did not start correctly"),Method.c_str());
3b5421b4 AL	162
3b5421b4 AL	163	RunMessages();
8b89e57f AL	164	if (OwnerQ != 0)
8b89e57f AL	165	SendConfiguration();
3b5421b4 AL	166
	167	return true;
	168	}
	169	/}}}/
	170	// Worker::ReadMessages - Read all pending messages into the list /{{{/
	171	// ---------------------------------------------------------------------
0a8a80e5	172	/* */
3b5421b4 AL	173	bool pkgAcquire::Worker::ReadMessages()
3b5421b4 AL	174	{
0a8a80e5 AL	175	if (::ReadMessages(InFd,MessageQueue) == false)
0a8a80e5 AL	176	return MethodFailure();
3b5421b4 AL	177	return true;
	178	}
	179	/}}}/
3b5421b4 AL	180	// Worker::RunMessage - Empty the message queue /{{{/
	181	// ---------------------------------------------------------------------
	182	/* This takes the messages from the message queue and runs them through
	183	the parsers in order. */
	184	bool pkgAcquire::Worker::RunMessages()
	185	{
	186	while (MessageQueue.empty() == false)
	187	{
	188	string Message = MessageQueue.front();
	189	MessageQueue.erase(MessageQueue.begin());
0a8a80e5 AL	190
	191	if (Debug == true)
	192	clog << " <- " << Access << ':' << QuoteString(Message,"\n") << endl;
3b5421b4 AL	193
	194	// Fetch the message number
	195	char *End;
	196	int Number = strtol(Message.c_str(),&End,10);
	197	if (End == Message.c_str())
	198	return _error->Error("Invalid message from method %s: %s",Access.c_str(),Message.c_str());
	199
c88edf1d AL	200	string URI = LookupTag(Message,"URI");
	201	pkgAcquire::Queue::QItem *Itm = 0;
	202	if (URI.empty() == false)
	203	Itm = OwnerQ->FindItem(URI,this);
196fd136 MV	204
	205	// update used mirror
	206	string UsedMirror = LookupTag(Message,"UsedMirror", "");
	207	if (!UsedMirror.empty() &&
	208	Itm &&
	209	Itm->Description.find(" ") != string::npos)
	210	{
	211	Itm->Description.replace(0, Itm->Description.find(" "), UsedMirror);
	212	// FIXME: will we need this as well?
	213	//Itm->ShortDesc = UsedMirror;
	214	}
bfd22fc0	215
3b5421b4 AL	216	// Determine the message number and dispatch
	217	switch (Number)
	218	{
0a8a80e5	219	// 100 Capabilities
3b5421b4 AL	220	case 100:
	221	if (Capabilities(Message) == false)
	222	return _error->Error("Unable to process Capabilities message from %s",Access.c_str());
	223	break;
0a8a80e5 AL	224
	225	// 101 Log
	226	case 101:
	227	if (Debug == true)
	228	clog << " <- (log) " << LookupTag(Message,"Message") << endl;
	229	break;
	230
	231	// 102 Status
	232	case 102:
	233	Status = LookupTag(Message,"Message");
	234	break;
	235
15d7e515 MV	236	// 103 Redirect
	237	case 103:
	238	{
	239	if (Itm == 0)
	240	{
	241	_error->Error("Method gave invalid 103 Redirect message");
	242	break;
	243	}
	244
	245	string NewURI = LookupTag(Message,"New-URI",URI.c_str());
	246	Itm->URI = NewURI;
5674f6b3 RG	247
	248	ItemDone();
	249
	250	pkgAcquire::Item *Owner = Itm->Owner;
	251	pkgAcquire::ItemDesc Desc = *Itm;
	252
	253	// Change the status so that it can be dequeued
	254	Owner->Status = pkgAcquire::Item::StatIdle;
	255	// Mark the item as done (taking care of all queues)
	256	// and then put it in the main queue again
	257	OwnerQ->ItemDone(Itm);
	258	OwnerQ->Owner->Enqueue(Desc);
	259
	260	if (Log != 0)
	261	Log->Done(Desc);
15d7e515 MV	262	break;
	263	}
	264
0a8a80e5 AL	265	// 200 URI Start
0a8a80e5 AL	266	case 200:
c88edf1d AL	267	{
	268	if (Itm == 0)
	269	{
93bf083d	270	_error->Error("Method gave invalid 200 URI Start message");
c88edf1d AL	271	break;
c88edf1d AL	272	}
8267fe24	273
c88edf1d AL	274	CurrentItem = Itm;
c88edf1d AL	275	CurrentSize = 0;
650faab0 DK	276	TotalSize = strtoull(LookupTag(Message,"Size","0").c_str(), NULL, 10);
	277	ResumePoint = strtoull(LookupTag(Message,"Resume-Point","0").c_str(), NULL, 10);
	278	Itm->Owner->Start(Message,strtoull(LookupTag(Message,"Size","0").c_str(), NULL, 10));
8b75eb1c	279
c5ccf175 AL	280	// Display update before completion
	281	if (Log != 0 && Log->MorePulses == true)
	282	Log->Pulse(Itm->Owner->GetOwner());
	283
8267fe24 AL	284	if (Log != 0)
	285	Log->Fetch(*Itm);
	286
c88edf1d AL	287	break;
c88edf1d AL	288	}
0a8a80e5 AL	289
	290	// 201 URI Done
	291	case 201:
c88edf1d AL	292	{
	293	if (Itm == 0)
	294	{
93bf083d	295	_error->Error("Method gave invalid 201 URI Done message");
c88edf1d AL	296	break;
c88edf1d AL	297	}
c5ccf175	298
bfd22fc0	299	pkgAcquire::Item *Owner = Itm->Owner;
8267fe24	300	pkgAcquire::ItemDesc Desc = *Itm;
c5ccf175 AL	301
	302	// Display update before completion
	303	if (Log != 0 && Log->MorePulses == true)
	304	Log->Pulse(Owner->GetOwner());
	305
be4401bf	306	OwnerQ->ItemDone(Itm);
650faab0	307	unsigned long long const ServerSize = strtoull(LookupTag(Message,"Size","0").c_str(), NULL, 10);
1dea08eb MV	308	bool isHit = StringToBool(LookupTag(Message,"IMS-Hit"),false) \|\|
	309	StringToBool(LookupTag(Message,"Alt-IMS-Hit"),false);
	310	// Using the https method the server might return 200, but the
	311	// If-Modified-Since condition is not satsified, libcurl will
	312	// discard the download. In this case, however, TotalSize will be
	313	// set to the actual size of the file, while ServerSize will be set
	314	// to 0. Therefore, if the item is marked as a hit and the
	315	// downloaded size (ServerSize) is 0, we ignore TotalSize.
	316	if (TotalSize != 0 && (!isHit \|\| ServerSize != 0) && ServerSize != TotalSize)
73da43e9	317	_error->Warning("Size of file %s is not what the server reported %s %llu",
378fcbd6	318	Owner->DestFile.c_str(), LookupTag(Message,"Size","0").c_str(),TotalSize);
bdae53f1	319
8a8feb29 MV	320	// see if there is a hash to verify
	321	string RecivedHash;
	322	HashString expectedHash(Owner->HashSum());
	323	if(!expectedHash.empty())
	324	{
	325	string hashTag = expectedHash.HashType()+"-Hash";
95f45727 MV	326	string hashSum = LookupTag(Message, hashTag.c_str());
	327	if(!hashSum.empty())
	328	RecivedHash = expectedHash.HashType() + ":" + hashSum;
8a8feb29 MV	329	if(_config->FindB("Debug::pkgAcquire::Auth", false) == true)
	330	{
	331	clog << "201 URI Done: " << Owner->DescURI() << endl
	332	<< "RecivedHash: " << RecivedHash << endl
	333	<< "ExpectedHash: " << expectedHash.toStr()
	334	<< endl << endl;
	335	}
	336	}
378fcbd6	337	Owner->Done(Message, ServerSize, RecivedHash.c_str(), Config);
8267fe24 AL	338	ItemDone();
	339
	340	// Log that we are done
	341	if (Log != 0)
	342	{
1dea08eb	343	if (isHit)
c46824ce AL	344	{
	345	/* Hide 'hits' for local only sources - we also manage to
	346	hide gets */
	347	if (Config->LocalOnly == false)
	348	Log->IMSHit(Desc);
	349	}
8267fe24 AL	350	else
8267fe24 AL	351	Log->Done(Desc);
18ef0a78	352	}
c88edf1d AL	353	break;
c88edf1d AL	354	}
0a8a80e5 AL	355
	356	// 400 URI Failure
	357	case 400:
c88edf1d AL	358	{
	359	if (Itm == 0)
	360	{
93bf083d	361	_error->Error("Method gave invalid 400 URI Failure message");
c88edf1d AL	362	break;
	363	}
	364
c5ccf175 AL	365	// Display update before completion
	366	if (Log != 0 && Log->MorePulses == true)
	367	Log->Pulse(Itm->Owner->GetOwner());
	368
bfd22fc0	369	pkgAcquire::Item *Owner = Itm->Owner;
8267fe24	370	pkgAcquire::ItemDesc Desc = *Itm;
c88edf1d	371	OwnerQ->ItemDone(Itm);
7e5f33eb MV	372
	373	// set some status
	374	if(LookupTag(Message,"FailReason") == "Timeout" \|\|
	375	LookupTag(Message,"FailReason") == "TmpResolveFailure" \|\|
f0983ff2	376	LookupTag(Message,"FailReason") == "ResolveFailure" \|\|
7e5f33eb MV	377	LookupTag(Message,"FailReason") == "ConnectionRefused")
	378	Owner->Status = pkgAcquire::Item::StatTransientNetworkError;
	379
7d8afa39	380	Owner->Failed(Message,Config);
8267fe24	381	ItemDone();
7d8afa39	382
8267fe24 AL	383	if (Log != 0)
8267fe24 AL	384	Log->Fail(Desc);
7d8afa39	385
c88edf1d AL	386	break;
c88edf1d AL	387	}
0a8a80e5 AL	388
	389	// 401 General Failure
	390	case 401:
b2e465d6	391	_error->Error("Method %s General failure: %s",Access.c_str(),LookupTag(Message,"Message").c_str());
0a8a80e5	392	break;
542ec555 AL	393
	394	// 403 Media Change
	395	case 403:
	396	MediaChange(Message);
	397	break;
3b5421b4 AL	398	}
	399	}
	400	return true;
	401	}
	402	/}}}/
	403	// Worker::Capabilities - 100 Capabilities handler /{{{/
	404	// ---------------------------------------------------------------------
	405	/* This parses the capabilities message and dumps it into the configuration
	406	structure. */
	407	bool pkgAcquire::Worker::Capabilities(string Message)
	408	{
	409	if (Config == 0)
	410	return true;
	411
	412	Config->Version = LookupTag(Message,"Version");
	413	Config->SingleInstance = StringToBool(LookupTag(Message,"Single-Instance"),false);
0a8a80e5 AL	414	Config->Pipeline = StringToBool(LookupTag(Message,"Pipeline"),false);
0a8a80e5 AL	415	Config->SendConfig = StringToBool(LookupTag(Message,"Send-Config"),false);
e331f6ed	416	Config->LocalOnly = StringToBool(LookupTag(Message,"Local-Only"),false);
8e5fc8f5	417	Config->NeedsCleanup = StringToBool(LookupTag(Message,"Needs-Cleanup"),false);
459681d3	418	Config->Removable = StringToBool(LookupTag(Message,"Removable"),false);
3b5421b4 AL	419
	420	// Some debug text
	421	if (Debug == true)
	422	{
	423	clog << "Configured access method " << Config->Access << endl;
459681d3 AL	424	clog << "Version:" << Config->Version <<
	425	" SingleInstance:" << Config->SingleInstance <<
	426	" Pipeline:" << Config->Pipeline <<
	427	" SendConfig:" << Config->SendConfig <<
	428	" LocalOnly: " << Config->LocalOnly <<
	429	" NeedsCleanup: " << Config->NeedsCleanup <<
	430	" Removable: " << Config->Removable << endl;
3b5421b4 AL	431	}
3b5421b4 AL	432
542ec555 AL	433	return true;
	434	}
	435	/}}}/
	436	// Worker::MediaChange - Request a media change /{{{/
	437	// ---------------------------------------------------------------------
	438	/* */
	439	bool pkgAcquire::Worker::MediaChange(string Message)
	440	{
80a26ed1 MV	441	int status_fd = _config->FindI("APT::Status-Fd",-1);
	442	if(status_fd > 0)
	443	{
	444	string Media = LookupTag(Message,"Media");
	445	string Drive = LookupTag(Message,"Drive");
	446	ostringstream msg,status;
1a82c63e MV	447	ioprintf(msg,_("Please insert the disc labeled: "
	448	"'%s' "
	449	"in the drive '%s' and press enter."),
	450	Media.c_str(),Drive.c_str());
80a26ed1	451	status << "media-change: " // message
1a82c63e MV	452	<< Media << ":" // media
	453	<< Drive << ":" // drive
	454	<< msg.str() // l10n message
80a26ed1	455	<< endl;
31bda500 DK	456
31bda500 DK	457	std::string const dlstatus = status.str();
d68d65ad	458	FileFd::Write(status_fd, dlstatus.c_str(), dlstatus.size());
80a26ed1 MV	459	}
80a26ed1 MV	460
542ec555 AL	461	if (Log == 0 \|\| Log->MediaChange(LookupTag(Message,"Media"),
	462	LookupTag(Message,"Drive")) == false)
	463	{
	464	char S[300];
96bc43c4	465	snprintf(S,sizeof(S),"603 Media Changed\nFailed: true\n\n");
542ec555 AL	466	if (Debug == true)
	467	clog << " -> " << Access << ':' << QuoteString(S,"\n") << endl;
	468	OutQueue += S;
	469	OutReady = true;
	470	return true;
	471	}
	472
	473	char S[300];
96bc43c4	474	snprintf(S,sizeof(S),"603 Media Changed\n\n");
542ec555 AL	475	if (Debug == true)
	476	clog << " -> " << Access << ':' << QuoteString(S,"\n") << endl;
	477	OutQueue += S;
	478	OutReady = true;
3b5421b4 AL	479	return true;
3b5421b4 AL	480	}
0118833a	481	/}}}/
0a8a80e5 AL	482	// Worker::SendConfiguration - Send the config to the method /{{{/
	483	// ---------------------------------------------------------------------
	484	/* */
	485	bool pkgAcquire::Worker::SendConfiguration()
	486	{
	487	if (Config->SendConfig == false)
	488	return true;
	489
	490	if (OutFd == -1)
	491	return false;
0a8a80e5	492
d280d03a	493	/* Write out all of the configuration directives by walking the
0a8a80e5	494	configuration tree */
d280d03a DK	495	std::ostringstream Message;
	496	Message << "601 Configuration\n";
	497	_config->Dump(Message, NULL, "Config-Item: %F=%V\n", false);
	498	Message << '\n';
0a8a80e5 AL	499
0a8a80e5 AL	500	if (Debug == true)
d280d03a DK	501	clog << " -> " << Access << ':' << QuoteString(Message.str(),"\n") << endl;
	502	OutQueue += Message.str();
	503	OutReady = true;
	504
0a8a80e5 AL	505	return true;
	506	}
	507	/}}}/
	508	// Worker::QueueItem - Add an item to the outbound queue /{{{/
	509	// ---------------------------------------------------------------------
	510	/* Send a URI Acquire message to the method */
	511	bool pkgAcquire::Worker::QueueItem(pkgAcquire::Queue::QItem *Item)
	512	{
	513	if (OutFd == -1)
	514	return false;
	515
	516	string Message = "600 URI Acquire\n";
	517	Message.reserve(300);
	518	Message += "URI: " + Item->URI;
	519	Message += "\nFilename: " + Item->Owner->DestFile;
	520	Message += Item->Owner->Custom600Headers();
	521	Message += "\n\n";
	522
	523	if (Debug == true)
	524	clog << " -> " << Access << ':' << QuoteString(Message,"\n") << endl;
	525	OutQueue += Message;
	526	OutReady = true;
	527
	528	return true;
	529	}
	530	/}}}/
	531	// Worker::OutFdRead - Out bound FD is ready /{{{/
	532	// ---------------------------------------------------------------------
	533	/* */
	534	bool pkgAcquire::Worker::OutFdReady()
	535	{
ee7af1bd YY	536	int Res;
	537	do
	538	{
	539	Res = write(OutFd,OutQueue.c_str(),OutQueue.length());
	540	}
	541	while (Res < 0 && errno == EINTR);
	542
	543	if (Res <= 0)
0a8a80e5	544	return MethodFailure();
ee7af1bd YY	545
ee7af1bd YY	546	OutQueue.erase(0,Res);
0a8a80e5 AL	547	if (OutQueue.empty() == true)
	548	OutReady = false;
	549
	550	return true;
	551	}
	552	/}}}/
	553	// Worker::InFdRead - In bound FD is ready /{{{/
	554	// ---------------------------------------------------------------------
	555	/* */
	556	bool pkgAcquire::Worker::InFdReady()
	557	{
	558	if (ReadMessages() == false)
	559	return false;
	560	RunMessages();
	561	return true;
	562	}
	563	/}}}/
	564	// Worker::MethodFailure - Called when the method fails /{{{/
	565	// ---------------------------------------------------------------------
	566	/* This is called when the method is belived to have failed, probably because
	567	read returned -1. */
	568	bool pkgAcquire::Worker::MethodFailure()
	569	{
76d97c26 AL	570	_error->Error("Method %s has died unexpectedly!",Access.c_str());
76d97c26 AL	571
ab7f4d7c MV	572	// do not reap the child here to show meaningfull error to the user
ab7f4d7c MV	573	ExecWait(Process,Access.c_str(),false);
0a8a80e5 AL	574	Process = -1;
	575	close(InFd);
	576	close(OutFd);
	577	InFd = -1;
	578	OutFd = -1;
	579	OutReady = false;
	580	InReady = false;
	581	OutQueue = string();
	582	MessageQueue.erase(MessageQueue.begin(),MessageQueue.end());
	583
	584	return false;
	585	}
	586	/}}}/
8267fe24 AL	587	// Worker::Pulse - Called periodically /{{{/
	588	// ---------------------------------------------------------------------
	589	/* */
	590	void pkgAcquire::Worker::Pulse()
	591	{
	592	if (CurrentItem == 0)
	593	return;
542ec555	594
8267fe24 AL	595	struct stat Buf;
	596	if (stat(CurrentItem->Owner->DestFile.c_str(),&Buf) != 0)
	597	return;
	598	CurrentSize = Buf.st_size;
18ef0a78 AL	599
	600	// Hmm? Should not happen...
	601	if (CurrentSize > TotalSize && TotalSize != 0)
	602	TotalSize = CurrentSize;
8267fe24 AL	603	}
	604	/}}}/
	605	// Worker::ItemDone - Called when the current item is finished /{{{/
	606	// ---------------------------------------------------------------------
	607	/* */
	608	void pkgAcquire::Worker::ItemDone()
	609	{
	610	CurrentItem = 0;
	611	CurrentSize = 0;
	612	TotalSize = 0;
	613	Status = string();
	614	}
	615	/}}}/