* use mark-and-sweep from aptitude now as GC algorithm

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

diff --git a/apt-pkg/acquire-worker.cc b/apt-pkg/acquire-worker.cc
index 688c5e2202d5f5e8bccf0b427ebd52eb829a2bae..5cd7d6f1e640458aef11edffb85357605bbdec97 100644 (file)
--- a/apt-pkg/acquire-worker.cc
+++ b/apt-pkg/acquire-worker.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/

-// $Id: acquire-worker.cc,v 1.3 1998/10/20 04:33:12 jgg Exp $
+// $Id: acquire-worker.cc,v 1.34 2001/05/22 04:42:54 jgg Exp $

 /* ######################################################################
 
    Acquire Worker 
 /* ######################################################################
 
    Acquire Worker 


@@ -16,25 +16,40 @@
 #pragma implementation "apt-pkg/acquire-worker.h"
 #endif
 #include <apt-pkg/acquire-worker.h>
 #pragma implementation "apt-pkg/acquire-worker.h"
 #endif
 #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/configuration.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/fileutl.h>

-#include <strutl.h>
+#include <apt-pkg/strutl.h>

 
 

+#include <apti18n.h>
+
+#include <iostream>
+#include <fstream>
+    
+#include <sys/stat.h>

 #include <unistd.h>
 #include <unistd.h>

+#include <fcntl.h>

 #include <signal.h>
 #include <signal.h>

-#include <wait.h>
+#include <stdio.h>
+#include <errno.h>

                                                                        /*}}}*/
 
                                                                        /*}}}*/
 

+using namespace std;
+

 // Worker::Worker - Constructor for Queue startup                      /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // Worker::Worker - Constructor for Queue startup                      /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-pkgAcquire::Worker::Worker(Queue *Q,string Acc)
+pkgAcquire::Worker::Worker(Queue *Q,MethodConfig *Cnf,
+                          pkgAcquireStatus *Log) : Log(Log)

 {
    OwnerQ = Q;
 {
    OwnerQ = Q;

-   Config = 0;
-   Access = Acc;
-
+   Config = Cnf;
+   Access = Cnf->Access;
+   CurrentItem = 0;
+   TotalSize = 0;
+   CurrentSize = 0;
+   

    Construct();   
 }
                                                                        /*}}}*/
    Construct();   
 }
                                                                        /*}}}*/


@@ -46,7 +61,10 @@ pkgAcquire::Worker::Worker(MethodConfig *Cnf)
    OwnerQ = 0;
    Config = Cnf;
    Access = Cnf->Access;
    OwnerQ = 0;
    Config = Cnf;
    Access = Cnf->Access;

-
+   CurrentItem = 0;
+   TotalSize = 0;
+   CurrentSize = 0;
+   

    Construct();   
 }
                                                                        /*}}}*/
    Construct();   
 }
                                                                        /*}}}*/


@@ -55,10 +73,13 @@ pkgAcquire::Worker::Worker(MethodConfig *Cnf)
 /* */
 void pkgAcquire::Worker::Construct()
 {
 /* */
 void pkgAcquire::Worker::Construct()
 {

-   Next = 0;
+   NextQueue = 0;
+   NextAcquire = 0;

    Process = -1;
    InFd = -1;
    OutFd = -1;
    Process = -1;
    InFd = -1;
    OutFd = -1;

+   OutReady = false;
+   InReady = false;

    Debug = _config->FindB("Debug::pkgAcquire::Worker",false);
 }
                                                                        /*}}}*/
    Debug = _config->FindB("Debug::pkgAcquire::Worker",false);
 }
                                                                        /*}}}*/


@@ -71,7 +92,13 @@ pkgAcquire::Worker::~Worker()
    close(OutFd);
    
    if (Process > 0)
    close(OutFd);
    
    if (Process > 0)

-      kill(Process,SIGINT);
+   {
+      /* 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                            /*{{{*/
 }
                                                                        /*}}}*/
 // Worker::Start - Start the worker process                            /*{{{*/


@@ -82,7 +109,7 @@ bool pkgAcquire::Worker::Start()
    // Get the method path
    string Method = _config->FindDir("Dir::Bin::Methods") + Access;
    if (FileExists(Method) == false)
    // 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());
+      return _error->Error(_("The method driver %s could not be found."),Method.c_str());

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


@@ -96,24 +123,16 @@ bool pkgAcquire::Worker::Start()
         close(Pipes[I]);
       return false;
    }
         close(Pipes[I]);
       return false;
    }

-      
+   for (int I = 0; I != 4; I++)
+      SetCloseExec(Pipes[I],true);
+   

    // Fork off the process
    // Fork off the process

-   Process = fork();
-   if (Process < 0)
-   {
-      cerr << "FATAL -> Failed to fork." << endl;
-      exit(100);
-   }
-
-   // Spawn the subprocess
+   Process = ExecFork();

    if (Process == 0)
    {
       // Setup the FDs
       dup2(Pipes[1],STDOUT_FILENO);
       dup2(Pipes[2],STDIN_FILENO);
    if (Process == 0)
    {
       // Setup the FDs
       dup2(Pipes[1],STDOUT_FILENO);
       dup2(Pipes[2],STDIN_FILENO);

-      dup2(((filebuf *)clog.rdbuf())->fd(),STDERR_FILENO);
-      for (int I = 0; I != 4; I++)
-        close(Pipes[I]);

       SetCloseExec(STDOUT_FILENO,false);
       SetCloseExec(STDIN_FILENO,false);      
       SetCloseExec(STDERR_FILENO,false);
       SetCloseExec(STDOUT_FILENO,false);
       SetCloseExec(STDIN_FILENO,false);      
       SetCloseExec(STDERR_FILENO,false);


@@ -123,7 +142,7 @@ bool pkgAcquire::Worker::Start()
       Args[1] = 0;
       execv(Args[0],(char **)Args);
       cerr << "Failed to exec method " << Args[0] << endl;
       Args[1] = 0;
       execv(Args[0],(char **)Args);
       cerr << "Failed to exec method " << Args[0] << endl;

-      exit(100);
+      _exit(100);

    }
 
    // Fix up our FDs
    }
 
    // Fix up our FDs


@@ -133,81 +152,31 @@ bool pkgAcquire::Worker::Start()
    SetNonBlock(Pipes[3],true);
    close(Pipes[1]);
    close(Pipes[2]);
    SetNonBlock(Pipes[3],true);
    close(Pipes[1]);
    close(Pipes[2]);

+   OutReady = false;
+   InReady = true;

    
    // Read the configuration data
    if (WaitFd(InFd) == false ||
        ReadMessages() == false)
    
    // Read the configuration data
    if (WaitFd(InFd) == false ||
        ReadMessages() == false)

-      return _error->Error("Method %s did not start correctly",Method.c_str());
+      return _error->Error(_("Method %s did not start correctly"),Method.c_str());

 
    RunMessages();
 
    RunMessages();

+   if (OwnerQ != 0)
+      SendConfiguration();

    
    return true;
 }
                                                                        /*}}}*/
 // Worker::ReadMessages - Read all pending messages into the list      /*{{{*/
 // ---------------------------------------------------------------------
    
    return true;
 }
                                                                        /*}}}*/
 // Worker::ReadMessages - Read all pending messages into the list      /*{{{*/
 // ---------------------------------------------------------------------

-/* This pulls full messages from the input FD into the message buffer. 
-   It assumes that messages will not pause during transit so no
-   fancy buffering is used. */
+/* */

 bool pkgAcquire::Worker::ReadMessages()
 {
 bool pkgAcquire::Worker::ReadMessages()
 {

-   char Buffer[4000];
-   char *End = Buffer;
-   
-   while (1)
-   {
-      int Res = read(InFd,End,sizeof(Buffer) - (End-Buffer));
-      
-      // Process is dead, this is kind of bad..
-      if (Res == 0)
-      {
-        if (waitpid(Process,0,0) != Process)
-           _error->Warning("I waited but nothing was there!");
-        Process = -1;
-        close(InFd);
-        close(OutFd);
-        InFd = -1;
-        OutFd = -1;
-        return false;
-      }
-      
-      // No data
-      if (Res == -1)
-        return true;
-      
-      End += Res;
-      
-      // Look for the end of the message
-      for (char *I = Buffer; I < End; I++)
-      {
-        if (I[0] != '\n' || I[1] != '\n')
-           continue;
-        
-        // Pull the message out
-        string Message(Buffer,0,I-Buffer);
-
-        // Fix up the buffer
-        for (; I < End && *I == '\n'; I++);
-        End -= I-Buffer;        
-        memmove(Buffer,I,End-Buffer);
-        I = Buffer;
-
-        if (Debug == true)
-           clog << "Message " << Access << ':' << QuoteString(Message,"\n") << endl;
-        
-        MessageQueue.push_back(Message);
-      }
-      if (End == Buffer)
-        return true;
-
-      if (WaitFd(InFd) == false)
-        return false;
-   }
-   
+   if (::ReadMessages(InFd,MessageQueue) == false)
+      return MethodFailure();

    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/

-

 // Worker::RunMessage - Empty the message queue                                /*{{{*/
 // ---------------------------------------------------------------------
 /* This takes the messages from the message queue and runs them through
 // Worker::RunMessage - Empty the message queue                                /*{{{*/
 // ---------------------------------------------------------------------
 /* This takes the messages from the message queue and runs them through


@@ -218,6 +187,9 @@ bool pkgAcquire::Worker::RunMessages()
    {
       string Message = MessageQueue.front();
       MessageQueue.erase(MessageQueue.begin());
    {
       string Message = MessageQueue.front();
       MessageQueue.erase(MessageQueue.begin());

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

       
       // Fetch the message number
       char *End;
       
       // Fetch the message number
       char *End;


@@ -225,13 +197,133 @@ bool pkgAcquire::Worker::RunMessages()
       if (End == Message.c_str())
         return _error->Error("Invalid message from method %s: %s",Access.c_str(),Message.c_str());
 
       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);
+      

       // Determine the message number and dispatch
       switch (Number)
       {
       // 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;
         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;
+           
+        // 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);
+
+           Owner->Done(Message,atoi(LookupTag(Message,"Size","0").c_str()),
+                       LookupTag(Message,"MD5-Hash"),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);
+           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;
       }      
    }
    return true;


@@ -248,16 +340,209 @@ bool pkgAcquire::Worker::Capabilities(string Message)
    
    Config->Version = LookupTag(Message,"Version");
    Config->SingleInstance = StringToBool(LookupTag(Message,"Single-Instance"),false);
    
    Config->Version = LookupTag(Message,"Version");
    Config->SingleInstance = StringToBool(LookupTag(Message,"Single-Instance"),false);

-   Config->PreScan = StringToBool(LookupTag(Message,"Pre-Scan"),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;
 
    // Some debug text
    if (Debug == true)
    {
       clog << "Configured access method " << Config->Access << endl;

-      clog << "Version: " << Config->Version << " SingleInstance: " << 
-        Config->SingleInstance << " PreScan: " << Config->PreScan << 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)
+{
+   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();
+
+   // Hmm.. this should never happen.
+   if (Res < 0)
+      return true;
+   
+   OutQueue.erase(0,Res);
+   if (OutQueue.empty() == true)
+      OutReady = false;

    
    return true;
 }
                                                                        /*}}}*/
    
    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());
+   
+   ExecWait(Process,Access.c_str(),true);
+   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();
+}
+                                                                       /*}}}*/