[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);
	    if (TotalSize != 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 (StringToBool(LookupTag(Message,"IMS-Hit"),false) == true ||
		   StringToBool(LookupTag(Message,"Alt-IMS-Hit"),false) == true)
	       {
		  /* 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);
378fcbd6	308	if (TotalSize != 0 && ServerSize != TotalSize)
73da43e9	309	_error->Warning("Size of file %s is not what the server reported %s %llu",
378fcbd6	310	Owner->DestFile.c_str(), LookupTag(Message,"Size","0").c_str(),TotalSize);
bdae53f1	311
8a8feb29 MV	312	// see if there is a hash to verify
	313	string RecivedHash;
	314	HashString expectedHash(Owner->HashSum());
	315	if(!expectedHash.empty())
	316	{
	317	string hashTag = expectedHash.HashType()+"-Hash";
95f45727 MV	318	string hashSum = LookupTag(Message, hashTag.c_str());
	319	if(!hashSum.empty())
	320	RecivedHash = expectedHash.HashType() + ":" + hashSum;
8a8feb29 MV	321	if(_config->FindB("Debug::pkgAcquire::Auth", false) == true)
	322	{
	323	clog << "201 URI Done: " << Owner->DescURI() << endl
	324	<< "RecivedHash: " << RecivedHash << endl
	325	<< "ExpectedHash: " << expectedHash.toStr()
	326	<< endl << endl;
	327	}
	328	}
378fcbd6	329	Owner->Done(Message, ServerSize, RecivedHash.c_str(), Config);
8267fe24 AL	330	ItemDone();
	331
	332	// Log that we are done
	333	if (Log != 0)
	334	{
	335	if (StringToBool(LookupTag(Message,"IMS-Hit"),false) == true \|\|
	336	StringToBool(LookupTag(Message,"Alt-IMS-Hit"),false) == true)
c46824ce AL	337	{
	338	/* Hide 'hits' for local only sources - we also manage to
	339	hide gets */
	340	if (Config->LocalOnly == false)
	341	Log->IMSHit(Desc);
	342	}
8267fe24 AL	343	else
8267fe24 AL	344	Log->Done(Desc);
18ef0a78	345	}
c88edf1d AL	346	break;
c88edf1d AL	347	}
0a8a80e5 AL	348
	349	// 400 URI Failure
	350	case 400:
c88edf1d AL	351	{
	352	if (Itm == 0)
	353	{
93bf083d	354	_error->Error("Method gave invalid 400 URI Failure message");
c88edf1d AL	355	break;
	356	}
	357
c5ccf175 AL	358	// Display update before completion
	359	if (Log != 0 && Log->MorePulses == true)
	360	Log->Pulse(Itm->Owner->GetOwner());
	361
bfd22fc0	362	pkgAcquire::Item *Owner = Itm->Owner;
8267fe24	363	pkgAcquire::ItemDesc Desc = *Itm;
c88edf1d	364	OwnerQ->ItemDone(Itm);
7e5f33eb MV	365
	366	// set some status
	367	if(LookupTag(Message,"FailReason") == "Timeout" \|\|
	368	LookupTag(Message,"FailReason") == "TmpResolveFailure" \|\|
f0983ff2	369	LookupTag(Message,"FailReason") == "ResolveFailure" \|\|
7e5f33eb MV	370	LookupTag(Message,"FailReason") == "ConnectionRefused")
	371	Owner->Status = pkgAcquire::Item::StatTransientNetworkError;
	372
7d8afa39	373	Owner->Failed(Message,Config);
8267fe24	374	ItemDone();
7d8afa39	375
8267fe24 AL	376	if (Log != 0)
8267fe24 AL	377	Log->Fail(Desc);
7d8afa39	378
c88edf1d AL	379	break;
c88edf1d AL	380	}
0a8a80e5 AL	381
	382	// 401 General Failure
	383	case 401:
b2e465d6	384	_error->Error("Method %s General failure: %s",Access.c_str(),LookupTag(Message,"Message").c_str());
0a8a80e5	385	break;
542ec555 AL	386
	387	// 403 Media Change
	388	case 403:
	389	MediaChange(Message);
	390	break;
3b5421b4 AL	391	}
	392	}
	393	return true;
	394	}
	395	/}}}/
	396	// Worker::Capabilities - 100 Capabilities handler /{{{/
	397	// ---------------------------------------------------------------------
	398	/* This parses the capabilities message and dumps it into the configuration
	399	structure. */
	400	bool pkgAcquire::Worker::Capabilities(string Message)
	401	{
	402	if (Config == 0)
	403	return true;
	404
	405	Config->Version = LookupTag(Message,"Version");
	406	Config->SingleInstance = StringToBool(LookupTag(Message,"Single-Instance"),false);
0a8a80e5 AL	407	Config->Pipeline = StringToBool(LookupTag(Message,"Pipeline"),false);
0a8a80e5 AL	408	Config->SendConfig = StringToBool(LookupTag(Message,"Send-Config"),false);
e331f6ed	409	Config->LocalOnly = StringToBool(LookupTag(Message,"Local-Only"),false);
8e5fc8f5	410	Config->NeedsCleanup = StringToBool(LookupTag(Message,"Needs-Cleanup"),false);
459681d3	411	Config->Removable = StringToBool(LookupTag(Message,"Removable"),false);
3b5421b4 AL	412
	413	// Some debug text
	414	if (Debug == true)
	415	{
	416	clog << "Configured access method " << Config->Access << endl;
459681d3 AL	417	clog << "Version:" << Config->Version <<
	418	" SingleInstance:" << Config->SingleInstance <<
	419	" Pipeline:" << Config->Pipeline <<
	420	" SendConfig:" << Config->SendConfig <<
	421	" LocalOnly: " << Config->LocalOnly <<
	422	" NeedsCleanup: " << Config->NeedsCleanup <<
	423	" Removable: " << Config->Removable << endl;
3b5421b4 AL	424	}
3b5421b4 AL	425
542ec555 AL	426	return true;
	427	}
	428	/}}}/
	429	// Worker::MediaChange - Request a media change /{{{/
	430	// ---------------------------------------------------------------------
	431	/* */
	432	bool pkgAcquire::Worker::MediaChange(string Message)
	433	{
80a26ed1 MV	434	int status_fd = _config->FindI("APT::Status-Fd",-1);
	435	if(status_fd > 0)
	436	{
	437	string Media = LookupTag(Message,"Media");
	438	string Drive = LookupTag(Message,"Drive");
	439	ostringstream msg,status;
1a82c63e MV	440	ioprintf(msg,_("Please insert the disc labeled: "
	441	"'%s' "
	442	"in the drive '%s' and press enter."),
	443	Media.c_str(),Drive.c_str());
80a26ed1	444	status << "media-change: " // message
1a82c63e MV	445	<< Media << ":" // media
	446	<< Drive << ":" // drive
	447	<< msg.str() // l10n message
80a26ed1	448	<< endl;
31bda500 DK	449
31bda500 DK	450	std::string const dlstatus = status.str();
d68d65ad	451	FileFd::Write(status_fd, dlstatus.c_str(), dlstatus.size());
80a26ed1 MV	452	}
80a26ed1 MV	453
542ec555 AL	454	if (Log == 0 \|\| Log->MediaChange(LookupTag(Message,"Media"),
	455	LookupTag(Message,"Drive")) == false)
	456	{
	457	char S[300];
96bc43c4	458	snprintf(S,sizeof(S),"603 Media Changed\nFailed: true\n\n");
542ec555 AL	459	if (Debug == true)
	460	clog << " -> " << Access << ':' << QuoteString(S,"\n") << endl;
	461	OutQueue += S;
	462	OutReady = true;
	463	return true;
	464	}
	465
	466	char S[300];
96bc43c4	467	snprintf(S,sizeof(S),"603 Media Changed\n\n");
542ec555 AL	468	if (Debug == true)
	469	clog << " -> " << Access << ':' << QuoteString(S,"\n") << endl;
	470	OutQueue += S;
	471	OutReady = true;
3b5421b4 AL	472	return true;
3b5421b4 AL	473	}
0118833a	474	/}}}/
0a8a80e5 AL	475	// Worker::SendConfiguration - Send the config to the method /{{{/
	476	// ---------------------------------------------------------------------
	477	/* */
	478	bool pkgAcquire::Worker::SendConfiguration()
	479	{
	480	if (Config->SendConfig == false)
	481	return true;
	482
	483	if (OutFd == -1)
	484	return false;
0a8a80e5	485
d280d03a	486	/* Write out all of the configuration directives by walking the
0a8a80e5	487	configuration tree */
d280d03a DK	488	std::ostringstream Message;
	489	Message << "601 Configuration\n";
	490	_config->Dump(Message, NULL, "Config-Item: %F=%V\n", false);
	491	Message << '\n';
0a8a80e5 AL	492
0a8a80e5 AL	493	if (Debug == true)
d280d03a DK	494	clog << " -> " << Access << ':' << QuoteString(Message.str(),"\n") << endl;
	495	OutQueue += Message.str();
	496	OutReady = true;
	497
0a8a80e5 AL	498	return true;
	499	}
	500	/}}}/
	501	// Worker::QueueItem - Add an item to the outbound queue /{{{/
	502	// ---------------------------------------------------------------------
	503	/* Send a URI Acquire message to the method */
	504	bool pkgAcquire::Worker::QueueItem(pkgAcquire::Queue::QItem *Item)
	505	{
	506	if (OutFd == -1)
	507	return false;
	508
	509	string Message = "600 URI Acquire\n";
	510	Message.reserve(300);
	511	Message += "URI: " + Item->URI;
	512	Message += "\nFilename: " + Item->Owner->DestFile;
	513	Message += Item->Owner->Custom600Headers();
	514	Message += "\n\n";
	515
	516	if (Debug == true)
	517	clog << " -> " << Access << ':' << QuoteString(Message,"\n") << endl;
	518	OutQueue += Message;
	519	OutReady = true;
	520
	521	return true;
	522	}
	523	/}}}/
	524	// Worker::OutFdRead - Out bound FD is ready /{{{/
	525	// ---------------------------------------------------------------------
	526	/* */
	527	bool pkgAcquire::Worker::OutFdReady()
	528	{
ee7af1bd YY	529	int Res;
	530	do
	531	{
	532	Res = write(OutFd,OutQueue.c_str(),OutQueue.length());
	533	}
	534	while (Res < 0 && errno == EINTR);
	535
	536	if (Res <= 0)
0a8a80e5	537	return MethodFailure();
ee7af1bd YY	538
ee7af1bd YY	539	OutQueue.erase(0,Res);
0a8a80e5 AL	540	if (OutQueue.empty() == true)
	541	OutReady = false;
	542
	543	return true;
	544	}
	545	/}}}/
	546	// Worker::InFdRead - In bound FD is ready /{{{/
	547	// ---------------------------------------------------------------------
	548	/* */
	549	bool pkgAcquire::Worker::InFdReady()
	550	{
	551	if (ReadMessages() == false)
	552	return false;
	553	RunMessages();
	554	return true;
	555	}
	556	/}}}/
	557	// Worker::MethodFailure - Called when the method fails /{{{/
	558	// ---------------------------------------------------------------------
	559	/* This is called when the method is belived to have failed, probably because
	560	read returned -1. */
	561	bool pkgAcquire::Worker::MethodFailure()
	562	{
76d97c26 AL	563	_error->Error("Method %s has died unexpectedly!",Access.c_str());
76d97c26 AL	564
ab7f4d7c MV	565	// do not reap the child here to show meaningfull error to the user
ab7f4d7c MV	566	ExecWait(Process,Access.c_str(),false);
0a8a80e5 AL	567	Process = -1;
	568	close(InFd);
	569	close(OutFd);
	570	InFd = -1;
	571	OutFd = -1;
	572	OutReady = false;
	573	InReady = false;
	574	OutQueue = string();
	575	MessageQueue.erase(MessageQueue.begin(),MessageQueue.end());
	576
	577	return false;
	578	}
	579	/}}}/
8267fe24 AL	580	// Worker::Pulse - Called periodically /{{{/
	581	// ---------------------------------------------------------------------
	582	/* */
	583	void pkgAcquire::Worker::Pulse()
	584	{
	585	if (CurrentItem == 0)
	586	return;
542ec555	587
8267fe24 AL	588	struct stat Buf;
	589	if (stat(CurrentItem->Owner->DestFile.c_str(),&Buf) != 0)
	590	return;
	591	CurrentSize = Buf.st_size;
18ef0a78 AL	592
	593	// Hmm? Should not happen...
	594	if (CurrentSize > TotalSize && TotalSize != 0)
	595	TotalSize = CurrentSize;
8267fe24 AL	596	}
	597	/}}}/
	598	// Worker::ItemDone - Called when the current item is finished /{{{/
	599	// ---------------------------------------------------------------------
	600	/* */
	601	void pkgAcquire::Worker::ItemDone()
	602	{
	603	CurrentItem = 0;
	604	CurrentSize = 0;
	605	TotalSize = 0;
	606	Status = string();
	607	}
	608	/}}}/