// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: acquire-worker.cc,v 1.1 1998/10/15 06:59:59 jgg Exp $
+// $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 /*{{{*/
#ifdef __GNUG__
#pragma implementation "apt-pkg/acquire-worker.h"
-#endif
+#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/strutl.h>
+
+#include <apti18n.h>
+
+#include <iostream>
+#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);
+
+ // 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;
+
+ // 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;
+}
+ /*}}}*/
+// 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)
+{
+ 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;
+}
+ /*}}}*/
+// 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();
+}
/*}}}*/
projects / apt.git / blobdiff