[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 <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 <apti18n.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>
									/*}}}*/

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

	    // 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);
	    if (TotalSize != 0 &&
		(unsigned)atoi(LookupTag(Message,"Size","0").c_str()) != TotalSize)
	       _error->Warning("Bizarre Error - File size is not what the server reported %s %lu",
			       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,atoi(LookupTag(Message,"Size","0").c_str()),
			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;
      write(status_fd, status.str().c_str(), status.str().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;
   
   string Message = "601 Configuration\n";
   Message.reserve(2000);

   /* Write out all of the configuration directives by walking the 
      configuration tree */
   const Configuration::Item *Top = _config->Tree(0);
   for (; Top != 0;)
   {
      if (Top->Value.empty() == false)
      {
	 string Line = "Config-Item: " + QuoteString(Top->FullTag(),"=\"\n") + "=";
	 Line += QuoteString(Top->Value,"\n") + '\n';
	 Message += Line;
      }
      
      if (Top->Child != 0)
      {
	 Top = Top->Child;
	 continue;
      }
      
      while (Top != 0 && Top->Next == 0)
	 Top = Top->Parent;
      if (Top != 0)
	 Top = Top->Next;
   }   
   Message += '\n';

   if (Debug == true)
      clog << " -> " << Access << ':' << QuoteString(Message,"\n") << endl;
   OutQueue += Message;
   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 /{{{/
0118833a	15	#include <apt-pkg/acquire-worker.h>
0a8a80e5	16	#include <apt-pkg/acquire-item.h>
3b5421b4 AL	17	#include <apt-pkg/configuration.h>
	18	#include <apt-pkg/error.h>
	19	#include <apt-pkg/fileutl.h>
cdcc6d34	20	#include <apt-pkg/strutl.h>
3b5421b4	21
b2e465d6	22	#include <apti18n.h>
24a0d63a AL	23
24a0d63a AL	24	#include <iostream>
80a26ed1	25	#include <sstream>
24a0d63a	26	#include <fstream>
b2e465d6	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>
3b5421b4 AL	34	/}}}/
3b5421b4 AL	35
24a0d63a AL	36	using namespace std;
24a0d63a AL	37
3b5421b4 AL	38	// Worker::Worker - Constructor for Queue startup /{{{/
	39	// ---------------------------------------------------------------------
	40	/* */
8267fe24 AL	41	pkgAcquire::Worker::Worker(Queue Q,MethodConfig Cnf,
8267fe24 AL	42	pkgAcquireStatus *Log) : Log(Log)
3b5421b4 AL	43	{
3b5421b4 AL	44	OwnerQ = Q;
0a8a80e5 AL	45	Config = Cnf;
	46	Access = Cnf->Access;
	47	CurrentItem = 0;
18ef0a78 AL	48	TotalSize = 0;
	49	CurrentSize = 0;
	50
3b5421b4 AL	51	Construct();
	52	}
	53	/}}}/
	54	// Worker::Worker - Constructor for method config startup /{{{/
	55	// ---------------------------------------------------------------------
	56	/* */
	57	pkgAcquire::Worker::Worker(MethodConfig *Cnf)
	58	{
	59	OwnerQ = 0;
	60	Config = Cnf;
	61	Access = Cnf->Access;
0a8a80e5	62	CurrentItem = 0;
18ef0a78 AL	63	TotalSize = 0;
18ef0a78 AL	64	CurrentSize = 0;
0a8a80e5	65
3b5421b4 AL	66	Construct();
	67	}
	68	/}}}/
	69	// Worker::Construct - Constructor helper /{{{/
	70	// ---------------------------------------------------------------------
	71	/* */
	72	void pkgAcquire::Worker::Construct()
	73	{
0a8a80e5 AL	74	NextQueue = 0;
0a8a80e5 AL	75	NextAcquire = 0;
3b5421b4 AL	76	Process = -1;
	77	InFd = -1;
	78	OutFd = -1;
0a8a80e5 AL	79	OutReady = false;
0a8a80e5 AL	80	InReady = false;
3b5421b4 AL	81	Debug = _config->FindB("Debug::pkgAcquire::Worker",false);
	82	}
	83	/}}}/
	84	// Worker::~Worker - Destructor /{{{/
	85	// ---------------------------------------------------------------------
	86	/* */
	87	pkgAcquire::Worker::~Worker()
	88	{
	89	close(InFd);
	90	close(OutFd);
	91
	92	if (Process > 0)
0a8a80e5	93	{
8e5fc8f5 AL	94	/* Closing of stdin is the signal to exit and die when the process
	95	indicates it needs cleanup */
	96	if (Config->NeedsCleanup == false)
	97	kill(Process,SIGINT);
ddc1d8d0	98	ExecWait(Process,Access.c_str(),true);
0a8a80e5	99	}
3b5421b4 AL	100	}
	101	/}}}/
	102	// Worker::Start - Start the worker process /{{{/
	103	// ---------------------------------------------------------------------
	104	/* This forks the method and inits the communication channel */
	105	bool pkgAcquire::Worker::Start()
	106	{
	107	// Get the method path
	108	string Method = _config->FindDir("Dir::Bin::Methods") + Access;
	109	if (FileExists(Method) == false)
b2e465d6	110	return _error->Error(_("The method driver %s could not be found."),Method.c_str());
3b5421b4 AL	111
	112	if (Debug == true)
	113	clog << "Starting method '" << Method << '\'' << endl;
	114
	115	// Create the pipes
	116	int Pipes[4] = {-1,-1,-1,-1};
	117	if (pipe(Pipes) != 0 \|\| pipe(Pipes+2) != 0)
	118	{
	119	_error->Errno("pipe","Failed to create IPC pipe to subprocess");
	120	for (int I = 0; I != 4; I++)
	121	close(Pipes[I]);
	122	return false;
	123	}
8b89e57f	124	for (int I = 0; I != 4; I++)
4490f2de	125	SetCloseExec(Pipes[I],true);
8b89e57f	126
3b5421b4	127	// Fork off the process
54676e1a	128	Process = ExecFork();
3b5421b4 AL	129	if (Process == 0)
	130	{
	131	// Setup the FDs
	132	dup2(Pipes[1],STDOUT_FILENO);
	133	dup2(Pipes[2],STDIN_FILENO);
3b5421b4 AL	134	SetCloseExec(STDOUT_FILENO,false);
	135	SetCloseExec(STDIN_FILENO,false);
	136	SetCloseExec(STDERR_FILENO,false);
	137
	138	const char *Args[2];
	139	Args[0] = Method.c_str();
	140	Args[1] = 0;
	141	execv(Args[0],(char **)Args);
	142	cerr << "Failed to exec method " << Args[0] << endl;
0dbb95d8	143	_exit(100);
3b5421b4 AL	144	}
	145
	146	// Fix up our FDs
	147	InFd = Pipes[0];
	148	OutFd = Pipes[3];
	149	SetNonBlock(Pipes[0],true);
	150	SetNonBlock(Pipes[3],true);
	151	close(Pipes[1]);
	152	close(Pipes[2]);
0a8a80e5 AL	153	OutReady = false;
0a8a80e5 AL	154	InReady = true;
3b5421b4 AL	155
	156	// Read the configuration data
	157	if (WaitFd(InFd) == false \|\|
	158	ReadMessages() == false)
b2e465d6	159	return _error->Error(_("Method %s did not start correctly"),Method.c_str());
3b5421b4 AL	160
3b5421b4 AL	161	RunMessages();
8b89e57f AL	162	if (OwnerQ != 0)
8b89e57f AL	163	SendConfiguration();
3b5421b4 AL	164
	165	return true;
	166	}
	167	/}}}/
	168	// Worker::ReadMessages - Read all pending messages into the list /{{{/
	169	// ---------------------------------------------------------------------
0a8a80e5	170	/* */
3b5421b4 AL	171	bool pkgAcquire::Worker::ReadMessages()
3b5421b4 AL	172	{
0a8a80e5 AL	173	if (::ReadMessages(InFd,MessageQueue) == false)
0a8a80e5 AL	174	return MethodFailure();
3b5421b4 AL	175	return true;
	176	}
	177	/}}}/
3b5421b4 AL	178	// Worker::RunMessage - Empty the message queue /{{{/
	179	// ---------------------------------------------------------------------
	180	/* This takes the messages from the message queue and runs them through
	181	the parsers in order. */
	182	bool pkgAcquire::Worker::RunMessages()
	183	{
	184	while (MessageQueue.empty() == false)
	185	{
	186	string Message = MessageQueue.front();
	187	MessageQueue.erase(MessageQueue.begin());
0a8a80e5 AL	188
	189	if (Debug == true)
	190	clog << " <- " << Access << ':' << QuoteString(Message,"\n") << endl;
3b5421b4 AL	191
	192	// Fetch the message number
	193	char *End;
	194	int Number = strtol(Message.c_str(),&End,10);
	195	if (End == Message.c_str())
	196	return _error->Error("Invalid message from method %s: %s",Access.c_str(),Message.c_str());
	197
c88edf1d AL	198	string URI = LookupTag(Message,"URI");
	199	pkgAcquire::Queue::QItem *Itm = 0;
	200	if (URI.empty() == false)
	201	Itm = OwnerQ->FindItem(URI,this);
196fd136 MV	202
	203	// update used mirror
	204	string UsedMirror = LookupTag(Message,"UsedMirror", "");
	205	if (!UsedMirror.empty() &&
	206	Itm &&
	207	Itm->Description.find(" ") != string::npos)
	208	{
	209	Itm->Description.replace(0, Itm->Description.find(" "), UsedMirror);
	210	// FIXME: will we need this as well?
	211	//Itm->ShortDesc = UsedMirror;
	212	}
bfd22fc0	213
3b5421b4 AL	214	// Determine the message number and dispatch
	215	switch (Number)
	216	{
0a8a80e5	217	// 100 Capabilities
3b5421b4 AL	218	case 100:
	219	if (Capabilities(Message) == false)
	220	return _error->Error("Unable to process Capabilities message from %s",Access.c_str());
	221	break;
0a8a80e5 AL	222
	223	// 101 Log
	224	case 101:
	225	if (Debug == true)
	226	clog << " <- (log) " << LookupTag(Message,"Message") << endl;
	227	break;
	228
	229	// 102 Status
	230	case 102:
	231	Status = LookupTag(Message,"Message");
	232	break;
	233
15d7e515 MV	234	// 103 Redirect
	235	case 103:
	236	{
	237	if (Itm == 0)
	238	{
	239	_error->Error("Method gave invalid 103 Redirect message");
	240	break;
	241	}
	242
	243	string NewURI = LookupTag(Message,"New-URI",URI.c_str());
	244	Itm->URI = NewURI;
	245	break;
	246	}
	247
0a8a80e5 AL	248	// 200 URI Start
0a8a80e5 AL	249	case 200:
c88edf1d AL	250	{
	251	if (Itm == 0)
	252	{
93bf083d	253	_error->Error("Method gave invalid 200 URI Start message");
c88edf1d AL	254	break;
c88edf1d AL	255	}
8267fe24	256
c88edf1d AL	257	CurrentItem = Itm;
	258	CurrentSize = 0;
	259	TotalSize = atoi(LookupTag(Message,"Size","0").c_str());
8b75eb1c	260	ResumePoint = atoi(LookupTag(Message,"Resume-Point","0").c_str());
8267fe24	261	Itm->Owner->Start(Message,atoi(LookupTag(Message,"Size","0").c_str()));
8b75eb1c	262
c5ccf175 AL	263	// Display update before completion
	264	if (Log != 0 && Log->MorePulses == true)
	265	Log->Pulse(Itm->Owner->GetOwner());
	266
8267fe24 AL	267	if (Log != 0)
	268	Log->Fetch(*Itm);
	269
c88edf1d AL	270	break;
c88edf1d AL	271	}
0a8a80e5 AL	272
	273	// 201 URI Done
	274	case 201:
c88edf1d AL	275	{
	276	if (Itm == 0)
	277	{
93bf083d	278	_error->Error("Method gave invalid 201 URI Done message");
c88edf1d AL	279	break;
c88edf1d AL	280	}
c5ccf175	281
bfd22fc0	282	pkgAcquire::Item *Owner = Itm->Owner;
8267fe24	283	pkgAcquire::ItemDesc Desc = *Itm;
c5ccf175 AL	284
	285	// Display update before completion
	286	if (Log != 0 && Log->MorePulses == true)
	287	Log->Pulse(Owner->GetOwner());
	288
be4401bf	289	OwnerQ->ItemDone(Itm);
b2e465d6	290	if (TotalSize != 0 &&
bf3abeed	291	(unsigned)atoi(LookupTag(Message,"Size","0").c_str()) != TotalSize)
b2e465d6	292	_error->Warning("Bizarre Error - File size is not what the server reported %s %lu",
18ef0a78	293	LookupTag(Message,"Size","0").c_str(),TotalSize);
bdae53f1	294
8a8feb29 MV	295	// see if there is a hash to verify
	296	string RecivedHash;
	297	HashString expectedHash(Owner->HashSum());
	298	if(!expectedHash.empty())
	299	{
	300	string hashTag = expectedHash.HashType()+"-Hash";
95f45727 MV	301	string hashSum = LookupTag(Message, hashTag.c_str());
	302	if(!hashSum.empty())
	303	RecivedHash = expectedHash.HashType() + ":" + hashSum;
8a8feb29 MV	304	if(_config->FindB("Debug::pkgAcquire::Auth", false) == true)
	305	{
	306	clog << "201 URI Done: " << Owner->DescURI() << endl
	307	<< "RecivedHash: " << RecivedHash << endl
	308	<< "ExpectedHash: " << expectedHash.toStr()
	309	<< endl << endl;
	310	}
	311	}
bdae53f1	312	Owner->Done(Message,atoi(LookupTag(Message,"Size","0").c_str()),
8a8feb29	313	RecivedHash.c_str(), Config);
8267fe24 AL	314	ItemDone();
	315
	316	// Log that we are done
	317	if (Log != 0)
	318	{
	319	if (StringToBool(LookupTag(Message,"IMS-Hit"),false) == true \|\|
	320	StringToBool(LookupTag(Message,"Alt-IMS-Hit"),false) == true)
c46824ce AL	321	{
	322	/* Hide 'hits' for local only sources - we also manage to
	323	hide gets */
	324	if (Config->LocalOnly == false)
	325	Log->IMSHit(Desc);
	326	}
8267fe24 AL	327	else
8267fe24 AL	328	Log->Done(Desc);
18ef0a78	329	}
c88edf1d AL	330	break;
c88edf1d AL	331	}
0a8a80e5 AL	332
	333	// 400 URI Failure
	334	case 400:
c88edf1d AL	335	{
	336	if (Itm == 0)
	337	{
93bf083d	338	_error->Error("Method gave invalid 400 URI Failure message");
c88edf1d AL	339	break;
	340	}
	341
c5ccf175 AL	342	// Display update before completion
	343	if (Log != 0 && Log->MorePulses == true)
	344	Log->Pulse(Itm->Owner->GetOwner());
	345
bfd22fc0	346	pkgAcquire::Item *Owner = Itm->Owner;
8267fe24	347	pkgAcquire::ItemDesc Desc = *Itm;
c88edf1d	348	OwnerQ->ItemDone(Itm);
7e5f33eb MV	349
	350	// set some status
	351	if(LookupTag(Message,"FailReason") == "Timeout" \|\|
	352	LookupTag(Message,"FailReason") == "TmpResolveFailure" \|\|
f0983ff2	353	LookupTag(Message,"FailReason") == "ResolveFailure" \|\|
7e5f33eb MV	354	LookupTag(Message,"FailReason") == "ConnectionRefused")
	355	Owner->Status = pkgAcquire::Item::StatTransientNetworkError;
	356
7d8afa39	357	Owner->Failed(Message,Config);
8267fe24	358	ItemDone();
7d8afa39	359
8267fe24 AL	360	if (Log != 0)
8267fe24 AL	361	Log->Fail(Desc);
7d8afa39	362
c88edf1d AL	363	break;
c88edf1d AL	364	}
0a8a80e5 AL	365
	366	// 401 General Failure
	367	case 401:
b2e465d6	368	_error->Error("Method %s General failure: %s",Access.c_str(),LookupTag(Message,"Message").c_str());
0a8a80e5	369	break;
542ec555 AL	370
	371	// 403 Media Change
	372	case 403:
	373	MediaChange(Message);
	374	break;
3b5421b4 AL	375	}
	376	}
	377	return true;
	378	}
	379	/}}}/
	380	// Worker::Capabilities - 100 Capabilities handler /{{{/
	381	// ---------------------------------------------------------------------
	382	/* This parses the capabilities message and dumps it into the configuration
	383	structure. */
	384	bool pkgAcquire::Worker::Capabilities(string Message)
	385	{
	386	if (Config == 0)
	387	return true;
	388
	389	Config->Version = LookupTag(Message,"Version");
	390	Config->SingleInstance = StringToBool(LookupTag(Message,"Single-Instance"),false);
0a8a80e5 AL	391	Config->Pipeline = StringToBool(LookupTag(Message,"Pipeline"),false);
0a8a80e5 AL	392	Config->SendConfig = StringToBool(LookupTag(Message,"Send-Config"),false);
e331f6ed	393	Config->LocalOnly = StringToBool(LookupTag(Message,"Local-Only"),false);
8e5fc8f5	394	Config->NeedsCleanup = StringToBool(LookupTag(Message,"Needs-Cleanup"),false);
459681d3	395	Config->Removable = StringToBool(LookupTag(Message,"Removable"),false);
3b5421b4 AL	396
	397	// Some debug text
	398	if (Debug == true)
	399	{
	400	clog << "Configured access method " << Config->Access << endl;
459681d3 AL	401	clog << "Version:" << Config->Version <<
	402	" SingleInstance:" << Config->SingleInstance <<
	403	" Pipeline:" << Config->Pipeline <<
	404	" SendConfig:" << Config->SendConfig <<
	405	" LocalOnly: " << Config->LocalOnly <<
	406	" NeedsCleanup: " << Config->NeedsCleanup <<
	407	" Removable: " << Config->Removable << endl;
3b5421b4 AL	408	}
3b5421b4 AL	409
542ec555 AL	410	return true;
	411	}
	412	/}}}/
	413	// Worker::MediaChange - Request a media change /{{{/
	414	// ---------------------------------------------------------------------
	415	/* */
	416	bool pkgAcquire::Worker::MediaChange(string Message)
	417	{
80a26ed1 MV	418	int status_fd = _config->FindI("APT::Status-Fd",-1);
	419	if(status_fd > 0)
	420	{
	421	string Media = LookupTag(Message,"Media");
	422	string Drive = LookupTag(Message,"Drive");
	423	ostringstream msg,status;
1a82c63e MV	424	ioprintf(msg,_("Please insert the disc labeled: "
	425	"'%s' "
	426	"in the drive '%s' and press enter."),
	427	Media.c_str(),Drive.c_str());
80a26ed1	428	status << "media-change: " // message
1a82c63e MV	429	<< Media << ":" // media
	430	<< Drive << ":" // drive
	431	<< msg.str() // l10n message
80a26ed1 MV	432	<< endl;
	433	write(status_fd, status.str().c_str(), status.str().size());
	434	}
	435
542ec555 AL	436	if (Log == 0 \|\| Log->MediaChange(LookupTag(Message,"Media"),
	437	LookupTag(Message,"Drive")) == false)
	438	{
	439	char S[300];
96bc43c4	440	snprintf(S,sizeof(S),"603 Media Changed\nFailed: true\n\n");
542ec555 AL	441	if (Debug == true)
	442	clog << " -> " << Access << ':' << QuoteString(S,"\n") << endl;
	443	OutQueue += S;
	444	OutReady = true;
	445	return true;
	446	}
	447
	448	char S[300];
96bc43c4	449	snprintf(S,sizeof(S),"603 Media Changed\n\n");
542ec555 AL	450	if (Debug == true)
	451	clog << " -> " << Access << ':' << QuoteString(S,"\n") << endl;
	452	OutQueue += S;
	453	OutReady = true;
3b5421b4 AL	454	return true;
3b5421b4 AL	455	}
0118833a	456	/}}}/
0a8a80e5 AL	457	// Worker::SendConfiguration - Send the config to the method /{{{/
	458	// ---------------------------------------------------------------------
	459	/* */
	460	bool pkgAcquire::Worker::SendConfiguration()
	461	{
	462	if (Config->SendConfig == false)
	463	return true;
	464
	465	if (OutFd == -1)
	466	return false;
	467
	468	string Message = "601 Configuration\n";
	469	Message.reserve(2000);
	470
	471	/* Write out all of the configuration directives by walking the
	472	configuration tree */
	473	const Configuration::Item *Top = _config->Tree(0);
	474	for (; Top != 0;)
	475	{
	476	if (Top->Value.empty() == false)
	477	{
b2e465d6	478	string Line = "Config-Item: " + QuoteString(Top->FullTag(),"=\"\n") + "=";
0a8a80e5 AL	479	Line += QuoteString(Top->Value,"\n") + '\n';
	480	Message += Line;
	481	}
	482
	483	if (Top->Child != 0)
	484	{
	485	Top = Top->Child;
	486	continue;
	487	}
	488
	489	while (Top != 0 && Top->Next == 0)
	490	Top = Top->Parent;
	491	if (Top != 0)
	492	Top = Top->Next;
	493	}
	494	Message += '\n';
	495
	496	if (Debug == true)
	497	clog << " -> " << Access << ':' << QuoteString(Message,"\n") << endl;
	498	OutQueue += Message;
	499	OutReady = true;
	500
	501	return true;
	502	}
	503	/}}}/
	504	// Worker::QueueItem - Add an item to the outbound queue /{{{/
	505	// ---------------------------------------------------------------------
	506	/* Send a URI Acquire message to the method */
	507	bool pkgAcquire::Worker::QueueItem(pkgAcquire::Queue::QItem *Item)
	508	{
	509	if (OutFd == -1)
	510	return false;
	511
	512	string Message = "600 URI Acquire\n";
	513	Message.reserve(300);
	514	Message += "URI: " + Item->URI;
	515	Message += "\nFilename: " + Item->Owner->DestFile;
	516	Message += Item->Owner->Custom600Headers();
	517	Message += "\n\n";
	518
	519	if (Debug == true)
	520	clog << " -> " << Access << ':' << QuoteString(Message,"\n") << endl;
	521	OutQueue += Message;
	522	OutReady = true;
	523
	524	return true;
	525	}
	526	/}}}/
	527	// Worker::OutFdRead - Out bound FD is ready /{{{/
	528	// ---------------------------------------------------------------------
	529	/* */
	530	bool pkgAcquire::Worker::OutFdReady()
	531	{
b0db36b1 AL	532	int Res;
	533	do
	534	{
24a0d63a	535	Res = write(OutFd,OutQueue.c_str(),OutQueue.length());
b0db36b1 AL	536	}
	537	while (Res < 0 && errno == EINTR);
	538
0a8a80e5 AL	539	if (Res <= 0)
0a8a80e5 AL	540	return MethodFailure();
0a8a80e5 AL	541
	542	OutQueue.erase(0,Res);
	543	if (OutQueue.empty() == true)
	544	OutReady = false;
	545
	546	return true;
	547	}
	548	/}}}/
	549	// Worker::InFdRead - In bound FD is ready /{{{/
	550	// ---------------------------------------------------------------------
	551	/* */
	552	bool pkgAcquire::Worker::InFdReady()
	553	{
	554	if (ReadMessages() == false)
	555	return false;
	556	RunMessages();
	557	return true;
	558	}
	559	/}}}/
	560	// Worker::MethodFailure - Called when the method fails /{{{/
	561	// ---------------------------------------------------------------------
	562	/* This is called when the method is belived to have failed, probably because
	563	read returned -1. */
	564	bool pkgAcquire::Worker::MethodFailure()
	565	{
76d97c26 AL	566	_error->Error("Method %s has died unexpectedly!",Access.c_str());
76d97c26 AL	567
ab7f4d7c MV	568	// do not reap the child here to show meaningfull error to the user
ab7f4d7c MV	569	ExecWait(Process,Access.c_str(),false);
0a8a80e5 AL	570	Process = -1;
	571	close(InFd);
	572	close(OutFd);
	573	InFd = -1;
	574	OutFd = -1;
	575	OutReady = false;
	576	InReady = false;
	577	OutQueue = string();
	578	MessageQueue.erase(MessageQueue.begin(),MessageQueue.end());
	579
	580	return false;
	581	}
	582	/}}}/
8267fe24 AL	583	// Worker::Pulse - Called periodically /{{{/
	584	// ---------------------------------------------------------------------
	585	/* */
	586	void pkgAcquire::Worker::Pulse()
	587	{
	588	if (CurrentItem == 0)
	589	return;
542ec555	590
8267fe24 AL	591	struct stat Buf;
	592	if (stat(CurrentItem->Owner->DestFile.c_str(),&Buf) != 0)
	593	return;
	594	CurrentSize = Buf.st_size;
18ef0a78 AL	595
	596	// Hmm? Should not happen...
	597	if (CurrentSize > TotalSize && TotalSize != 0)
	598	TotalSize = CurrentSize;
8267fe24 AL	599	}
	600	/}}}/
	601	// Worker::ItemDone - Called when the current item is finished /{{{/
	602	// ---------------------------------------------------------------------
	603	/* */
	604	void pkgAcquire::Worker::ItemDone()
	605	{
	606	CurrentItem = 0;
	607	CurrentSize = 0;
	608	TotalSize = 0;
	609	Status = string();
	610	}
	611	/}}}/