[ntk/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.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 <apt-pkg/hashes.h>

#include <string>
#include <vector>
#include <iostream>
#include <sstream>

#include <sys/stat.h>
#include <stdlib.h>
#include <unistd.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)
   {
      _error->Error(_("The method driver %s could not be found."),Method.c_str());
      if (Access == "https")
	 _error->Notice(_("Is the package %s installed?"), "apt-transport-https");
      return false;
   }

   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 believed 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
453b82a3	17	#include <apt-pkg/acquire.h>
0118833a	18	#include <apt-pkg/acquire-worker.h>
0a8a80e5	19	#include <apt-pkg/acquire-item.h>
3b5421b4 AL	20	#include <apt-pkg/configuration.h>
	21	#include <apt-pkg/error.h>
	22	#include <apt-pkg/fileutl.h>
cdcc6d34	23	#include <apt-pkg/strutl.h>
453b82a3	24	#include <apt-pkg/hashes.h>
3b5421b4	25
453b82a3 DK	26	#include <string>
453b82a3 DK	27	#include <vector>
24a0d63a	28	#include <iostream>
80a26ed1	29	#include <sstream>
ea542140	30
8267fe24	31	#include <sys/stat.h>
453b82a3	32	#include <stdlib.h>
3b5421b4 AL	33	#include <unistd.h>
3b5421b4 AL	34	#include <signal.h>
542ec555	35	#include <stdio.h>
b0db36b1	36	#include <errno.h>
ea542140 DK	37
ea542140 DK	38	#include <apti18n.h>
3b5421b4 AL	39	/}}}/
3b5421b4 AL	40
24a0d63a AL	41	using namespace std;
24a0d63a AL	42
3b5421b4 AL	43	// Worker::Worker - Constructor for Queue startup /{{{/
	44	// ---------------------------------------------------------------------
	45	/* */
8267fe24 AL	46	pkgAcquire::Worker::Worker(Queue Q,MethodConfig Cnf,
8267fe24 AL	47	pkgAcquireStatus *Log) : Log(Log)
3b5421b4 AL	48	{
3b5421b4 AL	49	OwnerQ = Q;
0a8a80e5 AL	50	Config = Cnf;
	51	Access = Cnf->Access;
	52	CurrentItem = 0;
18ef0a78 AL	53	TotalSize = 0;
	54	CurrentSize = 0;
	55
3b5421b4 AL	56	Construct();
	57	}
	58	/}}}/
	59	// Worker::Worker - Constructor for method config startup /{{{/
	60	// ---------------------------------------------------------------------
	61	/* */
	62	pkgAcquire::Worker::Worker(MethodConfig *Cnf)
	63	{
	64	OwnerQ = 0;
	65	Config = Cnf;
	66	Access = Cnf->Access;
0a8a80e5	67	CurrentItem = 0;
18ef0a78 AL	68	TotalSize = 0;
18ef0a78 AL	69	CurrentSize = 0;
0a8a80e5	70
3b5421b4 AL	71	Construct();
	72	}
	73	/}}}/
	74	// Worker::Construct - Constructor helper /{{{/
	75	// ---------------------------------------------------------------------
	76	/* */
	77	void pkgAcquire::Worker::Construct()
	78	{
0a8a80e5 AL	79	NextQueue = 0;
0a8a80e5 AL	80	NextAcquire = 0;
3b5421b4 AL	81	Process = -1;
	82	InFd = -1;
	83	OutFd = -1;
0a8a80e5 AL	84	OutReady = false;
0a8a80e5 AL	85	InReady = false;
3b5421b4 AL	86	Debug = _config->FindB("Debug::pkgAcquire::Worker",false);
	87	}
	88	/}}}/
	89	// Worker::~Worker - Destructor /{{{/
	90	// ---------------------------------------------------------------------
	91	/* */
	92	pkgAcquire::Worker::~Worker()
	93	{
	94	close(InFd);
	95	close(OutFd);
	96
	97	if (Process > 0)
0a8a80e5	98	{
8e5fc8f5 AL	99	/* Closing of stdin is the signal to exit and die when the process
	100	indicates it needs cleanup */
	101	if (Config->NeedsCleanup == false)
	102	kill(Process,SIGINT);
ddc1d8d0	103	ExecWait(Process,Access.c_str(),true);
0a8a80e5	104	}
3b5421b4 AL	105	}
	106	/}}}/
	107	// Worker::Start - Start the worker process /{{{/
	108	// ---------------------------------------------------------------------
	109	/* This forks the method and inits the communication channel */
	110	bool pkgAcquire::Worker::Start()
	111	{
	112	// Get the method path
	113	string Method = _config->FindDir("Dir::Bin::Methods") + Access;
	114	if (FileExists(Method) == false)
9082a1fc DK	115	{
	116	_error->Error(_("The method driver %s could not be found."),Method.c_str());
	117	if (Access == "https")
	118	_error->Notice(_("Is the package %s installed?"), "apt-transport-https");
	119	return false;
	120	}
3b5421b4 AL	121
	122	if (Debug == true)
	123	clog << "Starting method '" << Method << '\'' << endl;
	124
	125	// Create the pipes
	126	int Pipes[4] = {-1,-1,-1,-1};
	127	if (pipe(Pipes) != 0 \|\| pipe(Pipes+2) != 0)
	128	{
	129	_error->Errno("pipe","Failed to create IPC pipe to subprocess");
	130	for (int I = 0; I != 4; I++)
	131	close(Pipes[I]);
	132	return false;
	133	}
8b89e57f	134	for (int I = 0; I != 4; I++)
4490f2de	135	SetCloseExec(Pipes[I],true);
8b89e57f	136
3b5421b4	137	// Fork off the process
54676e1a	138	Process = ExecFork();
3b5421b4 AL	139	if (Process == 0)
	140	{
	141	// Setup the FDs
	142	dup2(Pipes[1],STDOUT_FILENO);
	143	dup2(Pipes[2],STDIN_FILENO);
3b5421b4 AL	144	SetCloseExec(STDOUT_FILENO,false);
	145	SetCloseExec(STDIN_FILENO,false);
	146	SetCloseExec(STDERR_FILENO,false);
	147
	148	const char *Args[2];
	149	Args[0] = Method.c_str();
	150	Args[1] = 0;
	151	execv(Args[0],(char **)Args);
	152	cerr << "Failed to exec method " << Args[0] << endl;
0dbb95d8	153	_exit(100);
3b5421b4 AL	154	}
	155
	156	// Fix up our FDs
	157	InFd = Pipes[0];
	158	OutFd = Pipes[3];
	159	SetNonBlock(Pipes[0],true);
	160	SetNonBlock(Pipes[3],true);
	161	close(Pipes[1]);
	162	close(Pipes[2]);
0a8a80e5 AL	163	OutReady = false;
0a8a80e5 AL	164	InReady = true;
3b5421b4 AL	165
	166	// Read the configuration data
	167	if (WaitFd(InFd) == false \|\|
	168	ReadMessages() == false)
b2e465d6	169	return _error->Error(_("Method %s did not start correctly"),Method.c_str());
3b5421b4 AL	170
3b5421b4 AL	171	RunMessages();
8b89e57f AL	172	if (OwnerQ != 0)
8b89e57f AL	173	SendConfiguration();
3b5421b4 AL	174
	175	return true;
	176	}
	177	/}}}/
	178	// Worker::ReadMessages - Read all pending messages into the list /{{{/
	179	// ---------------------------------------------------------------------
0a8a80e5	180	/* */
3b5421b4 AL	181	bool pkgAcquire::Worker::ReadMessages()
3b5421b4 AL	182	{
0a8a80e5 AL	183	if (::ReadMessages(InFd,MessageQueue) == false)
0a8a80e5 AL	184	return MethodFailure();
3b5421b4 AL	185	return true;
	186	}
	187	/}}}/
3b5421b4 AL	188	// Worker::RunMessage - Empty the message queue /{{{/
	189	// ---------------------------------------------------------------------
	190	/* This takes the messages from the message queue and runs them through
	191	the parsers in order. */
	192	bool pkgAcquire::Worker::RunMessages()
	193	{
	194	while (MessageQueue.empty() == false)
	195	{
	196	string Message = MessageQueue.front();
	197	MessageQueue.erase(MessageQueue.begin());
0a8a80e5 AL	198
	199	if (Debug == true)
	200	clog << " <- " << Access << ':' << QuoteString(Message,"\n") << endl;
3b5421b4 AL	201
	202	// Fetch the message number
	203	char *End;
	204	int Number = strtol(Message.c_str(),&End,10);
	205	if (End == Message.c_str())
	206	return _error->Error("Invalid message from method %s: %s",Access.c_str(),Message.c_str());
	207
c88edf1d AL	208	string URI = LookupTag(Message,"URI");
	209	pkgAcquire::Queue::QItem *Itm = 0;
	210	if (URI.empty() == false)
	211	Itm = OwnerQ->FindItem(URI,this);
196fd136 MV	212
	213	// update used mirror
	214	string UsedMirror = LookupTag(Message,"UsedMirror", "");
	215	if (!UsedMirror.empty() &&
	216	Itm &&
	217	Itm->Description.find(" ") != string::npos)
	218	{
	219	Itm->Description.replace(0, Itm->Description.find(" "), UsedMirror);
	220	// FIXME: will we need this as well?
	221	//Itm->ShortDesc = UsedMirror;
	222	}
bfd22fc0	223
3b5421b4 AL	224	// Determine the message number and dispatch
	225	switch (Number)
	226	{
0a8a80e5	227	// 100 Capabilities
3b5421b4 AL	228	case 100:
	229	if (Capabilities(Message) == false)
	230	return _error->Error("Unable to process Capabilities message from %s",Access.c_str());
	231	break;
0a8a80e5 AL	232
	233	// 101 Log
	234	case 101:
	235	if (Debug == true)
	236	clog << " <- (log) " << LookupTag(Message,"Message") << endl;
	237	break;
	238
	239	// 102 Status
	240	case 102:
	241	Status = LookupTag(Message,"Message");
	242	break;
	243
15d7e515 MV	244	// 103 Redirect
	245	case 103:
	246	{
	247	if (Itm == 0)
	248	{
	249	_error->Error("Method gave invalid 103 Redirect message");
	250	break;
	251	}
	252
	253	string NewURI = LookupTag(Message,"New-URI",URI.c_str());
	254	Itm->URI = NewURI;
5674f6b3 RG	255
	256	ItemDone();
	257
	258	pkgAcquire::Item *Owner = Itm->Owner;
	259	pkgAcquire::ItemDesc Desc = *Itm;
	260
	261	// Change the status so that it can be dequeued
	262	Owner->Status = pkgAcquire::Item::StatIdle;
	263	// Mark the item as done (taking care of all queues)
	264	// and then put it in the main queue again
	265	OwnerQ->ItemDone(Itm);
	266	OwnerQ->Owner->Enqueue(Desc);
	267
	268	if (Log != 0)
	269	Log->Done(Desc);
15d7e515 MV	270	break;
	271	}
	272
0a8a80e5 AL	273	// 200 URI Start
0a8a80e5 AL	274	case 200:
c88edf1d AL	275	{
	276	if (Itm == 0)
	277	{
93bf083d	278	_error->Error("Method gave invalid 200 URI Start message");
c88edf1d AL	279	break;
c88edf1d AL	280	}
8267fe24	281
c88edf1d AL	282	CurrentItem = Itm;
c88edf1d AL	283	CurrentSize = 0;
650faab0 DK	284	TotalSize = strtoull(LookupTag(Message,"Size","0").c_str(), NULL, 10);
	285	ResumePoint = strtoull(LookupTag(Message,"Resume-Point","0").c_str(), NULL, 10);
	286	Itm->Owner->Start(Message,strtoull(LookupTag(Message,"Size","0").c_str(), NULL, 10));
8b75eb1c	287
c5ccf175 AL	288	// Display update before completion
	289	if (Log != 0 && Log->MorePulses == true)
	290	Log->Pulse(Itm->Owner->GetOwner());
	291
8267fe24 AL	292	if (Log != 0)
	293	Log->Fetch(*Itm);
	294
c88edf1d AL	295	break;
c88edf1d AL	296	}
0a8a80e5 AL	297
	298	// 201 URI Done
	299	case 201:
c88edf1d AL	300	{
	301	if (Itm == 0)
	302	{
93bf083d	303	_error->Error("Method gave invalid 201 URI Done message");
c88edf1d AL	304	break;
c88edf1d AL	305	}
c5ccf175	306
bfd22fc0	307	pkgAcquire::Item *Owner = Itm->Owner;
8267fe24	308	pkgAcquire::ItemDesc Desc = *Itm;
c5ccf175 AL	309
	310	// Display update before completion
	311	if (Log != 0 && Log->MorePulses == true)
	312	Log->Pulse(Owner->GetOwner());
	313
be4401bf	314	OwnerQ->ItemDone(Itm);
650faab0	315	unsigned long long const ServerSize = strtoull(LookupTag(Message,"Size","0").c_str(), NULL, 10);
1dea08eb MV	316	bool isHit = StringToBool(LookupTag(Message,"IMS-Hit"),false) \|\|
	317	StringToBool(LookupTag(Message,"Alt-IMS-Hit"),false);
	318	// Using the https method the server might return 200, but the
	319	// If-Modified-Since condition is not satsified, libcurl will
	320	// discard the download. In this case, however, TotalSize will be
	321	// set to the actual size of the file, while ServerSize will be set
	322	// to 0. Therefore, if the item is marked as a hit and the
	323	// downloaded size (ServerSize) is 0, we ignore TotalSize.
	324	if (TotalSize != 0 && (!isHit \|\| ServerSize != 0) && ServerSize != TotalSize)
73da43e9	325	_error->Warning("Size of file %s is not what the server reported %s %llu",
378fcbd6	326	Owner->DestFile.c_str(), LookupTag(Message,"Size","0").c_str(),TotalSize);
bdae53f1	327
8a8feb29 MV	328	// see if there is a hash to verify
	329	string RecivedHash;
	330	HashString expectedHash(Owner->HashSum());
	331	if(!expectedHash.empty())
	332	{
	333	string hashTag = expectedHash.HashType()+"-Hash";
95f45727 MV	334	string hashSum = LookupTag(Message, hashTag.c_str());
	335	if(!hashSum.empty())
	336	RecivedHash = expectedHash.HashType() + ":" + hashSum;
8a8feb29 MV	337	if(_config->FindB("Debug::pkgAcquire::Auth", false) == true)
	338	{
	339	clog << "201 URI Done: " << Owner->DescURI() << endl
	340	<< "RecivedHash: " << RecivedHash << endl
	341	<< "ExpectedHash: " << expectedHash.toStr()
	342	<< endl << endl;
	343	}
	344	}
378fcbd6	345	Owner->Done(Message, ServerSize, RecivedHash.c_str(), Config);
8267fe24 AL	346	ItemDone();
	347
	348	// Log that we are done
	349	if (Log != 0)
	350	{
1dea08eb	351	if (isHit)
c46824ce AL	352	{
	353	/* Hide 'hits' for local only sources - we also manage to
	354	hide gets */
	355	if (Config->LocalOnly == false)
	356	Log->IMSHit(Desc);
	357	}
8267fe24 AL	358	else
8267fe24 AL	359	Log->Done(Desc);
18ef0a78	360	}
c88edf1d AL	361	break;
c88edf1d AL	362	}
0a8a80e5 AL	363
	364	// 400 URI Failure
	365	case 400:
c88edf1d AL	366	{
	367	if (Itm == 0)
	368	{
93bf083d	369	_error->Error("Method gave invalid 400 URI Failure message");
c88edf1d AL	370	break;
	371	}
	372
c5ccf175 AL	373	// Display update before completion
	374	if (Log != 0 && Log->MorePulses == true)
	375	Log->Pulse(Itm->Owner->GetOwner());
	376
bfd22fc0	377	pkgAcquire::Item *Owner = Itm->Owner;
8267fe24	378	pkgAcquire::ItemDesc Desc = *Itm;
c88edf1d	379	OwnerQ->ItemDone(Itm);
7e5f33eb MV	380
	381	// set some status
	382	if(LookupTag(Message,"FailReason") == "Timeout" \|\|
	383	LookupTag(Message,"FailReason") == "TmpResolveFailure" \|\|
f0983ff2	384	LookupTag(Message,"FailReason") == "ResolveFailure" \|\|
7e5f33eb MV	385	LookupTag(Message,"FailReason") == "ConnectionRefused")
	386	Owner->Status = pkgAcquire::Item::StatTransientNetworkError;
	387
7d8afa39	388	Owner->Failed(Message,Config);
8267fe24	389	ItemDone();
7d8afa39	390
8267fe24 AL	391	if (Log != 0)
8267fe24 AL	392	Log->Fail(Desc);
7d8afa39	393
c88edf1d AL	394	break;
c88edf1d AL	395	}
0a8a80e5 AL	396
	397	// 401 General Failure
	398	case 401:
b2e465d6	399	_error->Error("Method %s General failure: %s",Access.c_str(),LookupTag(Message,"Message").c_str());
0a8a80e5	400	break;
542ec555 AL	401
	402	// 403 Media Change
	403	case 403:
	404	MediaChange(Message);
	405	break;
3b5421b4 AL	406	}
	407	}
	408	return true;
	409	}
	410	/}}}/
	411	// Worker::Capabilities - 100 Capabilities handler /{{{/
	412	// ---------------------------------------------------------------------
	413	/* This parses the capabilities message and dumps it into the configuration
	414	structure. */
	415	bool pkgAcquire::Worker::Capabilities(string Message)
	416	{
	417	if (Config == 0)
	418	return true;
	419
	420	Config->Version = LookupTag(Message,"Version");
	421	Config->SingleInstance = StringToBool(LookupTag(Message,"Single-Instance"),false);
0a8a80e5 AL	422	Config->Pipeline = StringToBool(LookupTag(Message,"Pipeline"),false);
0a8a80e5 AL	423	Config->SendConfig = StringToBool(LookupTag(Message,"Send-Config"),false);
e331f6ed	424	Config->LocalOnly = StringToBool(LookupTag(Message,"Local-Only"),false);
8e5fc8f5	425	Config->NeedsCleanup = StringToBool(LookupTag(Message,"Needs-Cleanup"),false);
459681d3	426	Config->Removable = StringToBool(LookupTag(Message,"Removable"),false);
3b5421b4 AL	427
	428	// Some debug text
	429	if (Debug == true)
	430	{
	431	clog << "Configured access method " << Config->Access << endl;
459681d3 AL	432	clog << "Version:" << Config->Version <<
	433	" SingleInstance:" << Config->SingleInstance <<
	434	" Pipeline:" << Config->Pipeline <<
	435	" SendConfig:" << Config->SendConfig <<
	436	" LocalOnly: " << Config->LocalOnly <<
	437	" NeedsCleanup: " << Config->NeedsCleanup <<
	438	" Removable: " << Config->Removable << endl;
3b5421b4 AL	439	}
3b5421b4 AL	440
542ec555 AL	441	return true;
	442	}
	443	/}}}/
	444	// Worker::MediaChange - Request a media change /{{{/
	445	// ---------------------------------------------------------------------
	446	/* */
	447	bool pkgAcquire::Worker::MediaChange(string Message)
	448	{
80a26ed1 MV	449	int status_fd = _config->FindI("APT::Status-Fd",-1);
	450	if(status_fd > 0)
	451	{
	452	string Media = LookupTag(Message,"Media");
	453	string Drive = LookupTag(Message,"Drive");
	454	ostringstream msg,status;
1a82c63e MV	455	ioprintf(msg,_("Please insert the disc labeled: "
	456	"'%s' "
	457	"in the drive '%s' and press enter."),
	458	Media.c_str(),Drive.c_str());
80a26ed1	459	status << "media-change: " // message
1a82c63e MV	460	<< Media << ":" // media
	461	<< Drive << ":" // drive
	462	<< msg.str() // l10n message
80a26ed1	463	<< endl;
31bda500 DK	464
31bda500 DK	465	std::string const dlstatus = status.str();
d68d65ad	466	FileFd::Write(status_fd, dlstatus.c_str(), dlstatus.size());
80a26ed1 MV	467	}
80a26ed1 MV	468
542ec555 AL	469	if (Log == 0 \|\| Log->MediaChange(LookupTag(Message,"Media"),
	470	LookupTag(Message,"Drive")) == false)
	471	{
	472	char S[300];
96bc43c4	473	snprintf(S,sizeof(S),"603 Media Changed\nFailed: true\n\n");
542ec555 AL	474	if (Debug == true)
	475	clog << " -> " << Access << ':' << QuoteString(S,"\n") << endl;
	476	OutQueue += S;
	477	OutReady = true;
	478	return true;
	479	}
	480
	481	char S[300];
96bc43c4	482	snprintf(S,sizeof(S),"603 Media Changed\n\n");
542ec555 AL	483	if (Debug == true)
	484	clog << " -> " << Access << ':' << QuoteString(S,"\n") << endl;
	485	OutQueue += S;
	486	OutReady = true;
3b5421b4 AL	487	return true;
3b5421b4 AL	488	}
0118833a	489	/}}}/
0a8a80e5 AL	490	// Worker::SendConfiguration - Send the config to the method /{{{/
	491	// ---------------------------------------------------------------------
	492	/* */
	493	bool pkgAcquire::Worker::SendConfiguration()
	494	{
	495	if (Config->SendConfig == false)
	496	return true;
	497
	498	if (OutFd == -1)
	499	return false;
0a8a80e5	500
d280d03a	501	/* Write out all of the configuration directives by walking the
0a8a80e5	502	configuration tree */
d280d03a DK	503	std::ostringstream Message;
	504	Message << "601 Configuration\n";
	505	_config->Dump(Message, NULL, "Config-Item: %F=%V\n", false);
	506	Message << '\n';
0a8a80e5 AL	507
0a8a80e5 AL	508	if (Debug == true)
d280d03a DK	509	clog << " -> " << Access << ':' << QuoteString(Message.str(),"\n") << endl;
	510	OutQueue += Message.str();
	511	OutReady = true;
	512
0a8a80e5 AL	513	return true;
	514	}
	515	/}}}/
	516	// Worker::QueueItem - Add an item to the outbound queue /{{{/
	517	// ---------------------------------------------------------------------
	518	/* Send a URI Acquire message to the method */
	519	bool pkgAcquire::Worker::QueueItem(pkgAcquire::Queue::QItem *Item)
	520	{
	521	if (OutFd == -1)
	522	return false;
	523
	524	string Message = "600 URI Acquire\n";
	525	Message.reserve(300);
	526	Message += "URI: " + Item->URI;
	527	Message += "\nFilename: " + Item->Owner->DestFile;
	528	Message += Item->Owner->Custom600Headers();
	529	Message += "\n\n";
	530
	531	if (Debug == true)
	532	clog << " -> " << Access << ':' << QuoteString(Message,"\n") << endl;
	533	OutQueue += Message;
	534	OutReady = true;
	535
	536	return true;
	537	}
	538	/}}}/
	539	// Worker::OutFdRead - Out bound FD is ready /{{{/
	540	// ---------------------------------------------------------------------
	541	/* */
	542	bool pkgAcquire::Worker::OutFdReady()
	543	{
ee7af1bd YY	544	int Res;
	545	do
	546	{
	547	Res = write(OutFd,OutQueue.c_str(),OutQueue.length());
	548	}
	549	while (Res < 0 && errno == EINTR);
	550
	551	if (Res <= 0)
0a8a80e5	552	return MethodFailure();
ee7af1bd YY	553
ee7af1bd YY	554	OutQueue.erase(0,Res);
0a8a80e5 AL	555	if (OutQueue.empty() == true)
	556	OutReady = false;
	557
	558	return true;
	559	}
	560	/}}}/
	561	// Worker::InFdRead - In bound FD is ready /{{{/
	562	// ---------------------------------------------------------------------
	563	/* */
	564	bool pkgAcquire::Worker::InFdReady()
	565	{
	566	if (ReadMessages() == false)
	567	return false;
	568	RunMessages();
	569	return true;
	570	}
	571	/}}}/
	572	// Worker::MethodFailure - Called when the method fails /{{{/
	573	// ---------------------------------------------------------------------
1e3f4083	574	/* This is called when the method is believed to have failed, probably because
0a8a80e5 AL	575	read returned -1. */
	576	bool pkgAcquire::Worker::MethodFailure()
	577	{
76d97c26 AL	578	_error->Error("Method %s has died unexpectedly!",Access.c_str());
76d97c26 AL	579
ab7f4d7c MV	580	// do not reap the child here to show meaningfull error to the user
ab7f4d7c MV	581	ExecWait(Process,Access.c_str(),false);
0a8a80e5 AL	582	Process = -1;
	583	close(InFd);
	584	close(OutFd);
	585	InFd = -1;
	586	OutFd = -1;
	587	OutReady = false;
	588	InReady = false;
	589	OutQueue = string();
	590	MessageQueue.erase(MessageQueue.begin(),MessageQueue.end());
	591
	592	return false;
	593	}
	594	/}}}/
8267fe24 AL	595	// Worker::Pulse - Called periodically /{{{/
	596	// ---------------------------------------------------------------------
	597	/* */
	598	void pkgAcquire::Worker::Pulse()
	599	{
	600	if (CurrentItem == 0)
	601	return;
542ec555	602
8267fe24 AL	603	struct stat Buf;
	604	if (stat(CurrentItem->Owner->DestFile.c_str(),&Buf) != 0)
	605	return;
	606	CurrentSize = Buf.st_size;
18ef0a78 AL	607
	608	// Hmm? Should not happen...
	609	if (CurrentSize > TotalSize && TotalSize != 0)
	610	TotalSize = CurrentSize;
8267fe24 AL	611	}
	612	/}}}/
	613	// Worker::ItemDone - Called when the current item is finished /{{{/
	614	// ---------------------------------------------------------------------
	615	/* */
	616	void pkgAcquire::Worker::ItemDone()
	617	{
	618	CurrentItem = 0;
	619	CurrentSize = 0;
	620	TotalSize = 0;
	621	Status = string();
	622	}
	623	/}}}/