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.
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
+#include <config.h>
+
#include <apt-pkg/acquire.h>
#include <apt-pkg/acquire-item.h>
#include <apt-pkg/acquire-worker.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/fileutl.h>
-#include <apti18n.h>
-
+#include <algorithm>
+#include <string>
+#include <vector>
#include <iostream>
#include <sstream>
-#include <stdio.h>
+#include <iomanip>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <pwd.h>
+#include <grp.h>
#include <dirent.h>
#include <sys/time.h>
+#include <sys/select.h>
#include <errno.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <apti18n.h>
/*}}}*/
using namespace std;
Debug(_config->FindB("Debug::pkgAcquire",false)),
Running(false)
{
- string const Mode = _config->Find("Acquire::Queue-Mode","host");
- if (strcasecmp(Mode.c_str(),"host") == 0)
- QueueMode = QueueHost;
- if (strcasecmp(Mode.c_str(),"access") == 0)
- QueueMode = QueueAccess;
+ Initialize();
}
-pkgAcquire::pkgAcquire(pkgAcquireStatus *Progress) : LockFD(-1), Queues(0), Workers(0),
- Configs(0), Log(Progress), ToFetch(0),
+pkgAcquire::pkgAcquire(pkgAcquireStatus *Progress) : LockFD(-1), Queues(0), Workers(0),
+ Configs(0), Log(NULL), ToFetch(0),
Debug(_config->FindB("Debug::pkgAcquire",false)),
Running(false)
+{
+ Initialize();
+ SetLog(Progress);
+}
+void pkgAcquire::Initialize()
{
string const Mode = _config->Find("Acquire::Queue-Mode","host");
if (strcasecmp(Mode.c_str(),"host") == 0)
QueueMode = QueueHost;
if (strcasecmp(Mode.c_str(),"access") == 0)
QueueMode = QueueAccess;
- Setup(Progress, "");
+
+ // chown the auth.conf file as it will be accessed by our methods
+ std::string const SandboxUser = _config->Find("APT::Sandbox::User");
+ if (getuid() == 0 && SandboxUser.empty() == false) // if we aren't root, we can't chown, so don't try it
+ {
+ struct passwd const * const pw = getpwnam(SandboxUser.c_str());
+ struct group const * const gr = getgrnam("root");
+ if (pw != NULL && gr != NULL)
+ {
+ std::string const AuthConf = _config->FindFile("Dir::Etc::netrc");
+ if(AuthConf.empty() == false && RealFileExists(AuthConf) &&
+ chown(AuthConf.c_str(), pw->pw_uid, gr->gr_gid) != 0)
+ _error->WarningE("SetupAPTPartialDirectory", "chown to %s:root of file %s failed", SandboxUser.c_str(), AuthConf.c_str());
+ }
+ }
}
/*}}}*/
-// Acquire::Setup - Delayed Constructor /*{{{*/
-// ---------------------------------------------------------------------
-/* Do everything needed to be a complete Acquire object and report the
- success (or failure) back so the user knows that something is wrong… */
+// Acquire::GetLock - lock directory and prepare for action /*{{{*/
+static bool SetupAPTPartialDirectory(std::string const &grand, std::string const &parent)
+{
+ std::string const partial = parent + "partial";
+ mode_t const mode = umask(S_IWGRP | S_IWOTH);
+ bool const creation_fail = (CreateAPTDirectoryIfNeeded(grand, partial) == false &&
+ CreateAPTDirectoryIfNeeded(parent, partial) == false);
+ umask(mode);
+ if (creation_fail == true)
+ return false;
+
+ std::string const SandboxUser = _config->Find("APT::Sandbox::User");
+ if (getuid() == 0 && SandboxUser.empty() == false) // if we aren't root, we can't chown, so don't try it
+ {
+ struct passwd const * const pw = getpwnam(SandboxUser.c_str());
+ struct group const * const gr = getgrnam("root");
+ if (pw != NULL && gr != NULL)
+ {
+ // chown the partial dir
+ if(chown(partial.c_str(), pw->pw_uid, gr->gr_gid) != 0)
+ _error->WarningE("SetupAPTPartialDirectory", "chown to %s:root of directory %s failed", SandboxUser.c_str(), partial.c_str());
+ }
+ }
+ if (chmod(partial.c_str(), 0700) != 0)
+ _error->WarningE("SetupAPTPartialDirectory", "chmod 0700 of directory %s failed", partial.c_str());
+
+ return true;
+}
bool pkgAcquire::Setup(pkgAcquireStatus *Progress, string const &Lock)
{
Log = Progress;
+ if (Lock.empty())
+ {
+ string const listDir = _config->FindDir("Dir::State::lists");
+ if (SetupAPTPartialDirectory(_config->FindDir("Dir::State"), listDir) == false)
+ return _error->Errno("Acquire", _("List directory %spartial is missing."), listDir.c_str());
+ string const archivesDir = _config->FindDir("Dir::Cache::Archives");
+ if (SetupAPTPartialDirectory(_config->FindDir("Dir::Cache"), archivesDir) == false)
+ return _error->Errno("Acquire", _("Archives directory %spartial is missing."), archivesDir.c_str());
+ return true;
+ }
+ return GetLock(Lock);
+}
+bool pkgAcquire::GetLock(std::string const &Lock)
+{
+ if (Lock.empty() == true)
+ return false;
// check for existence and possibly create auxiliary directories
string const listDir = _config->FindDir("Dir::State::lists");
- string const partialListDir = listDir + "partial/";
string const archivesDir = _config->FindDir("Dir::Cache::Archives");
- string const partialArchivesDir = archivesDir + "partial/";
- if (CreateAPTDirectoryIfNeeded(_config->FindDir("Dir::State"), partialListDir) == false &&
- CreateAPTDirectoryIfNeeded(listDir, partialListDir) == false)
- return _error->Errno("Acquire", _("List directory %spartial is missing."), listDir.c_str());
-
- if (CreateAPTDirectoryIfNeeded(_config->FindDir("Dir::Cache"), partialArchivesDir) == false &&
- CreateAPTDirectoryIfNeeded(archivesDir, partialArchivesDir) == false)
- return _error->Errno("Acquire", _("Archives directory %spartial is missing."), archivesDir.c_str());
+ if (Lock == listDir)
+ {
+ if (SetupAPTPartialDirectory(_config->FindDir("Dir::State"), listDir) == false)
+ return _error->Errno("Acquire", _("List directory %spartial is missing."), listDir.c_str());
+ }
+ if (Lock == archivesDir)
+ {
+ if (SetupAPTPartialDirectory(_config->FindDir("Dir::Cache"), archivesDir) == false)
+ return _error->Errno("Acquire", _("Archives directory %spartial is missing."), archivesDir.c_str());
+ }
- if (Lock.empty() == true || _config->FindB("Debug::NoLocking", false) == true)
+ if (_config->FindB("Debug::NoLocking", false) == true)
return true;
// Lock the directory this acquire object will work in
- LockFD = GetLock(flCombine(Lock, "lock"));
+ if (LockFD != -1)
+ close(LockFD);
+ LockFD = ::GetLock(flCombine(Lock, "lock"));
if (LockFD == -1)
return _error->Error(_("Unable to lock directory %s"), Lock.c_str());
// ---------------------------------------------------------------------
/* 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)
{
Queue *I = Queues;
bool Res = false;
- for (; I != 0; I = I->Next)
- Res |= I->Dequeue(Itm);
-
if (Debug == true)
clog << "Dequeuing " << Itm->DestFile << endl;
+
+ for (; I != 0; I = I->Next)
+ {
+ if (I->Dequeue(Itm))
+ {
+ Res = true;
+ if (Debug == true)
+ clog << "Dequeued from " << I->Name << endl;
+ }
+ }
+
if (Res == true)
ToFetch--;
}
/* Single-Instance methods get exactly one queue per URI. This is
also used for the Access queue method */
if (Config->SingleInstance == true || QueueMode == QueueAccess)
- return U.Access;
+ return U.Access;
+
+ string AccessSchema = U.Access + ':',
+ FullQueueName = AccessSchema + U.Host;
+ unsigned int Instances = 0, SchemaLength = AccessSchema.length();
+
+ Queue *I = Queues;
+ for (; I != 0; I = I->Next) {
+ // if the queue already exists, re-use it
+ if (I->Name == FullQueueName)
+ return FullQueueName;
+
+ if (I->Name.compare(0, SchemaLength, AccessSchema) == 0)
+ Instances++;
+ }
+
+ if (Debug) {
+ clog << "Found " << Instances << " instances of " << U.Access << endl;
+ }
+
+ if (Instances >= (unsigned int)_config->FindI("Acquire::QueueHost::Limit",10))
+ return U.Access;
- return U.Access + ':' + U.Host;
+ return FullQueueName;
}
/*}}}*/
// Acquire::GetConfig - Fetch the configuration information /*{{{*/
pkgAcquire::Worker *pkgAcquire::WorkerStep(Worker *I)
{
return I->NextAcquire;
-};
+}
/*}}}*/
// Acquire::Clean - Cleans a directory /*{{{*/
// ---------------------------------------------------------------------
if it is part of the download set. */
bool pkgAcquire::Clean(string Dir)
{
+ // non-existing directories are by definition clean…
+ 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());
// 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)
// 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)
// 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)
// Acquire::MethodConfig::MethodConfig - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* */
-pkgAcquire::MethodConfig::MethodConfig()
+pkgAcquire::MethodConfig::MethodConfig() : d(NULL), Next(0), SingleInstance(false),
+ Pipeline(false), SendConfig(false), LocalOnly(false), NeedsCleanup(false),
+ Removable(false)
{
- SingleInstance = false;
- Pipeline = false;
- SendConfig = false;
- LocalOnly = false;
- Removable = false;
- Next = 0;
}
/*}}}*/
// Queue::Queue - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* */
-pkgAcquire::Queue::Queue(string Name,pkgAcquire *Owner) : Name(Name),
- Owner(Owner)
+pkgAcquire::Queue::Queue(string Name,pkgAcquire *Owner) : d(NULL), Next(0),
+ Name(Name), Items(0), Workers(0), Owner(Owner), PipeDepth(0), MaxPipeDepth(1)
{
- Items = 0;
- Next = 0;
- Workers = 0;
- MaxPipeDepth = 1;
- PipeDepth = 0;
}
/*}}}*/
// Queue::~Queue - Destructor /*{{{*/
{
QItem **I = &Items;
// move to the end of the queue and check for duplicates here
+ HashStringList const hsl = Item.Owner->GetExpectedHashes();
for (; *I != 0; I = &(*I)->Next)
- if (Item.URI == (*I)->URI)
+ if (Item.URI == (*I)->URI || hsl == (*I)->Owner->GetExpectedHashes())
{
- Item.Owner->Status = Item::StatDone;
+ if (_config->FindB("Debug::pkgAcquire::Worker",false) == true)
+ std::cerr << " @ Queue: Action combined for " << Item.URI << " and " << (*I)->URI << std::endl;
+ (*I)->Owners.push_back(Item.Owner);
+ Item.Owner->Status = (*I)->Owner->Status;
return false;
}
{
if (Owner->Status == pkgAcquire::Item::StatFetching)
return _error->Error("Tried to dequeue a fetching object");
-
+
bool Res = false;
-
+
QItem **I = &Items;
for (; *I != 0;)
{
- if ((*I)->Owner == Owner)
+ if (Owner == (*I)->Owner)
{
QItem *Jnk= *I;
*I = (*I)->Next;
else
I = &(*I)->Next;
}
-
+
return Res;
}
/*}}}*/
bool pkgAcquire::Queue::ItemDone(QItem *Itm)
{
PipeDepth--;
- if (Itm->Owner->Status == pkgAcquire::Item::StatFetching)
- Itm->Owner->Status = pkgAcquire::Item::StatDone;
-
+ for (QItem::owner_iterator O = Itm->Owners.begin(); O != Itm->Owners.end(); ++O)
+ {
+ if ((*O)->Status == pkgAcquire::Item::StatFetching)
+ (*O)->Status = pkgAcquire::Item::StatDone;
+ }
+
if (Itm->Owner->QueueCounter <= 1)
Owner->Dequeue(Itm->Owner);
else
Dequeue(Itm->Owner);
Owner->Bump();
}
-
+
return Cycle();
}
/*}}}*/
if (PipeDepth < 0)
return _error->Error("Pipedepth failure");
-
+
// Look for a queable item
QItem *I = Items;
while (PipeDepth < (signed)MaxPipeDepth)
for (; I != 0; I = I->Next)
if (I->Owner->Status == pkgAcquire::Item::StatIdle)
break;
-
+
// Nothing to do, queue is idle.
if (I == 0)
return true;
-
+
I->Worker = Workers;
- I->Owner->Status = pkgAcquire::Item::StatFetching;
+ for (QItem::owner_iterator O = I->Owners.begin(); O != I->Owners.end(); ++O)
+ (*O)->Status = pkgAcquire::Item::StatFetching;
PipeDepth++;
if (Workers->QueueItem(I) == false)
return false;
}
-
+
return true;
}
/*}}}*/
Cycle();
}
/*}}}*/
+HashStringList pkgAcquire::Queue::QItem::GetExpectedHashes() const /*{{{*/
+{
+ /* each Item can have multiple owners and each owner might have different
+ hashes, even if that is unlikely in practice and if so at least some
+ owners will later fail. There is one situation through which is not a
+ failure and still needs this handling: Two owners who expect the same
+ file, but one owner only knows the SHA1 while the other only knows SHA256. */
+ HashStringList superhsl;
+ for (pkgAcquire::Queue::QItem::owner_iterator O = Owners.begin(); O != Owners.end(); ++O)
+ {
+ HashStringList const hsl = (*O)->GetExpectedHashes();
+ if (hsl.usable() == false)
+ continue;
+ if (superhsl.usable() == false)
+ superhsl = hsl;
+ else
+ {
+ // we merge both lists - if we find disagreement send no hashes
+ HashStringList::const_iterator hs = hsl.begin();
+ for (; hs != hsl.end(); ++hs)
+ if (superhsl.push_back(*hs) == false)
+ break;
+ if (hs != hsl.end())
+ {
+ superhsl.clear();
+ break;
+ }
+ }
+ }
+ return superhsl;
+}
+ /*}}}*/
+APT_PURE unsigned long long pkgAcquire::Queue::QItem::GetMaximumSize() const /*{{{*/
+{
+ unsigned long long Maximum = std::numeric_limits<unsigned long long>::max();
+ for (pkgAcquire::Queue::QItem::owner_iterator O = Owners.begin(); O != Owners.end(); ++O)
+ {
+ if ((*O)->FileSize == 0)
+ continue;
+ Maximum = std::min(Maximum, (*O)->FileSize);
+ }
+ if (Maximum == std::numeric_limits<unsigned long long>::max())
+ return 0;
+ return Maximum;
+}
+ /*}}}*/
+void pkgAcquire::Queue::QItem::SyncDestinationFiles() const /*{{{*/
+{
+ /* ensure that the first owner has the best partial file of all and
+ the rest have (potentially dangling) symlinks to it so that
+ everything (like progress reporting) finds it easily */
+ std::string superfile = Owner->DestFile;
+ off_t supersize = 0;
+ for (pkgAcquire::Queue::QItem::owner_iterator O = Owners.begin(); O != Owners.end(); ++O)
+ {
+ if ((*O)->DestFile == superfile)
+ continue;
+ struct stat file;
+ if (lstat((*O)->DestFile.c_str(),&file) == 0)
+ {
+ if ((file.st_mode & S_IFREG) == 0)
+ unlink((*O)->DestFile.c_str());
+ else if (supersize < file.st_size)
+ {
+ supersize = file.st_size;
+ unlink(superfile.c_str());
+ rename((*O)->DestFile.c_str(), superfile.c_str());
+ }
+ else
+ unlink((*O)->DestFile.c_str());
+ if (symlink(superfile.c_str(), (*O)->DestFile.c_str()) != 0)
+ {
+ ; // not a problem per-se and no real alternative
+ }
+ }
+ }
+}
+ /*}}}*/
+std::string pkgAcquire::Queue::QItem::Custom600Headers() const /*{{{*/
+{
+ /* The others are relatively easy to merge, but this one?
+ Lets not merge and see how far we can run with it…
+ Likely, nobody will ever notice as all the items will
+ be of the same class and hence generate the same headers. */
+ return Owner->Custom600Headers();
+}
+ /*}}}*/
+
// AcquireStatus::pkgAcquireStatus - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* */
-pkgAcquireStatus::pkgAcquireStatus() : Update(true), MorePulses(false)
+pkgAcquireStatus::pkgAcquireStatus() : d(NULL), Percent(-1), Update(true), MorePulses(false)
{
Start();
}
// 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++;
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;
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;
ResumeSize += I->ResumePoint;
-
+
// Files with unknown size always have 100% completion
- if (I->CurrentItem->Owner->FileSize == 0 &&
+ if (I->CurrentItem->Owner->FileSize == 0 &&
I->CurrentItem->Owner->Complete == false)
TotalBytes += I->CurrentSize;
}
+ }
// Normalize the figures and account for unknown size downloads
if (TotalBytes <= 0)
// 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;
Time = NewTime;
}
+ double const OldPercent = Percent;
+ // 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));
+ double const DiffPercent = Percent - OldPercent;
+ if (DiffPercent < 0.001 && _config->FindB("Acquire::Progress::Diffpercent", false) == true)
+ return true;
+
int fd = _config->FindI("APT::Status-Fd",-1);
if(fd > 0)
{
snprintf(msg,sizeof(msg), _("Retrieving file %li of %li (%s remaining)"), i, TotalItems, TimeToStr(ETA).c_str());
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;
- write(fd, status.str().c_str(), status.str().size());
+ << ":" << std::setprecision(3) << Percent
+ << ":" << msg
+ << endl;
+
+ std::string const dlstatus = status.str();
+ FileFd::Write(fd, dlstatus.c_str(), dlstatus.size());
}
return true;
FetchedBytes += Size - Resume;
}
/*}}}*/
+
+APT_CONST pkgAcquire::UriIterator::~UriIterator() {}
+APT_CONST pkgAcquire::MethodConfig::~MethodConfig() {}
+APT_CONST pkgAcquireStatus::~pkgAcquireStatus() {}
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