Do not crash for apt-get install /dev/null

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

diff --git a/apt-pkg/acquire.cc b/apt-pkg/acquire.cc
index a8a5abd344d3ab720ae0a590f2b6ad5bb5fdc1e2..8467dab5b6086e1c2fe018debe36ab0d748dcd27 100644 (file)
--- a/apt-pkg/acquire.cc
+++ b/apt-pkg/acquire.cc
@@ -5,9 +5,9 @@
 
    Acquire - File Acquiration
 
-   The core element for the schedual system is the concept of a named
+   The core element for the schedule system is the concept of a named
    queue. Each queue is unique and each queue has a name derived from the
-   URI. The degree of paralization can be controled by how the queue
+   URI. The degree of paralization can be controlled by how the queue
    name is derived from the URI.
    
    ##################################################################### */
@@ -23,12 +23,19 @@
 #include <apt-pkg/strutl.h>
 #include <apt-pkg/fileutl.h>
 
+#include <string>
+#include <vector>
 #include <iostream>
 #include <sstream>
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <iomanip>
 
 #include <dirent.h>
 #include <sys/time.h>
+#include <sys/select.h>
 #include <errno.h>
 
 #include <apti18n.h>
@@ -175,7 +182,7 @@ void pkgAcquire::Add(Worker *Work)
 // ---------------------------------------------------------------------
 /* A worker has died. This can not be done while the select loop is running
    as it would require that RunFds could handling a changing list state and
-   it cant.. */
+   it can't.. */
 void pkgAcquire::Remove(Worker *Work)
 {
    if (Running == true)
@@ -468,7 +475,7 @@ void pkgAcquire::Bump()
 pkgAcquire::Worker *pkgAcquire::WorkerStep(Worker *I)
 {
    return I->NextAcquire;
-};
+}
                                                                        /*}}}*/
 // Acquire::Clean - Cleans a directory                                 /*{{{*/
 // ---------------------------------------------------------------------
@@ -480,6 +487,9 @@ bool pkgAcquire::Clean(string Dir)
    if (DirectoryExists(Dir) == false)
       return true;
 
+   if(Dir == "/")
+      return _error->Error(_("Clean of %s is not supported"), Dir.c_str());
+
    DIR *D = opendir(Dir.c_str());   
    if (D == 0)
       return _error->Errno("opendir",_("Unable to read %s"),Dir.c_str());
@@ -520,7 +530,7 @@ bool pkgAcquire::Clean(string Dir)
 // Acquire::TotalNeeded - Number of bytes to fetch                     /*{{{*/
 // ---------------------------------------------------------------------
 /* This is the total number of bytes needed */
-unsigned long long pkgAcquire::TotalNeeded()
+APT_PURE unsigned long long pkgAcquire::TotalNeeded()
 {
    unsigned long long Total = 0;
    for (ItemCIterator I = ItemsBegin(); I != ItemsEnd(); ++I)
@@ -531,7 +541,7 @@ unsigned long long pkgAcquire::TotalNeeded()
 // Acquire::FetchNeeded - Number of bytes needed to get                        /*{{{*/
 // ---------------------------------------------------------------------
 /* This is the number of bytes that is not local */
-unsigned long long pkgAcquire::FetchNeeded()
+APT_PURE unsigned long long pkgAcquire::FetchNeeded()
 {
    unsigned long long Total = 0;
    for (ItemCIterator I = ItemsBegin(); I != ItemsEnd(); ++I)
@@ -543,7 +553,7 @@ unsigned long long pkgAcquire::FetchNeeded()
 // Acquire::PartialPresent - Number of partial bytes we already have   /*{{{*/
 // ---------------------------------------------------------------------
 /* This is the number of bytes that is not local */
-unsigned long long pkgAcquire::PartialPresent()
+APT_PURE unsigned long long pkgAcquire::PartialPresent()
 {
   unsigned long long Total = 0;
    for (ItemCIterator I = ItemsBegin(); I != ItemsEnd(); ++I)
@@ -815,7 +825,9 @@ bool pkgAcquireStatus::Pulse(pkgAcquire *Owner)
    // Compute the total number of bytes to fetch
    unsigned int Unknown = 0;
    unsigned int Count = 0;
-   for (pkgAcquire::ItemCIterator I = Owner->ItemsBegin(); I != Owner->ItemsEnd();
+   bool UnfetchedReleaseFiles = false;
+   for (pkgAcquire::ItemCIterator I = Owner->ItemsBegin(); 
+        I != Owner->ItemsEnd();
        ++I, ++Count)
    {
       TotalItems++;
@@ -826,6 +838,13 @@ bool pkgAcquireStatus::Pulse(pkgAcquire *Owner)
       if ((*I)->Local == true)
         continue;
 
+      // see if the method tells us to expect more
+      TotalItems += (*I)->ExpectedAdditionalItems;
+
+      // check if there are unfetched Release files
+      if ((*I)->Complete == false && (*I)->ExpectedAdditionalItems > 0)
+         UnfetchedReleaseFiles = true;
+
       TotalBytes += (*I)->FileSize;
       if ((*I)->Complete == true)
         CurrentBytes += (*I)->FileSize;
@@ -837,6 +856,7 @@ bool pkgAcquireStatus::Pulse(pkgAcquire *Owner)
    unsigned long long ResumeSize = 0;
    for (pkgAcquire::Worker *I = Owner->WorkersBegin(); I != 0;
        I = Owner->WorkerStep(I))
+   {
       if (I->CurrentItem != 0 && I->CurrentItem->Owner->Complete == false)
       {
         CurrentBytes += I->CurrentSize;
@@ -847,6 +867,7 @@ bool pkgAcquireStatus::Pulse(pkgAcquire *Owner)
             I->CurrentItem->Owner->Complete == false)
            TotalBytes += I->CurrentSize;
       }
+   }
    
    // Normalize the figures and account for unknown size downloads
    if (TotalBytes <= 0)
@@ -857,6 +878,12 @@ bool pkgAcquireStatus::Pulse(pkgAcquire *Owner)
    // Wha?! Is not supposed to happen.
    if (CurrentBytes > TotalBytes)
       CurrentBytes = TotalBytes;
+
+   // debug
+   if (_config->FindB("Debug::acquire::progress", false) == true)
+      std::clog << " Bytes: " 
+                << SizeToStr(CurrentBytes) << " / " << SizeToStr(TotalBytes) 
+                << std::endl;
    
    // Compute the CPS
    struct timeval NewTime;
@@ -877,6 +904,14 @@ bool pkgAcquireStatus::Pulse(pkgAcquire *Owner)
       Time = NewTime;
    }
 
+   // calculate the percentage, if we have too little data assume 1%
+   if (TotalBytes > 0 && UnfetchedReleaseFiles)
+      Percent = 0;
+   else 
+      // use both files and bytes because bytes can be unreliable
+      Percent = (0.8 * (CurrentBytes/float(TotalBytes)*100.0) + 
+                 0.2 * (CurrentItems/float(TotalItems)*100.0));
+
    int fd = _config->FindI("APT::Status-Fd",-1);
    if(fd > 0) 
    {
@@ -894,13 +929,11 @@ bool pkgAcquireStatus::Pulse(pkgAcquire *Owner)
       else
         snprintf(msg,sizeof(msg), _("Retrieving file %li of %li"), i, TotalItems);
         
-
-
       // build the status str
       status << "dlstatus:" << i
-            << ":"  << (CurrentBytes/float(TotalBytes)*100.0) 
-            << ":" << msg 
-            << endl;
+             << ":"  << std::setprecision(3) << Percent
+             << ":" << msg 
+             << endl;
 
       std::string const dlstatus = status.str();
       FileFd::Write(fd, dlstatus.c_str(), dlstatus.size());