/* ######################################################################
Package Version Policy implementation
-
+
This is just a really simple wrapper around pkgVersionMatch with
some added goodies to manage the list of things..
-
- Priority Table:
-
- 1000 -> inf = Downgradeable priorities
- 1000 = The 'no downgrade' pseduo-status file
- 100 -> 1000 = Standard priorities
- 990 = Config file override package files
- 989 = Start for preference auto-priorities
- 500 = Default package files
- 100 = The status file and ButAutomaticUpgrades sources
- 0 -> 100 = NotAutomatic sources like experimental
- -inf -> 0 = Never selected
-
+
+ See man apt_preferences for what value means what.
+
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include <apt-pkg/strutl.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/error.h>
-#include <apt-pkg/sptr.h>
-
+#include <apt-pkg/cacheiterators.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/versionmatch.h>
+#include <apt-pkg/version.h>
+
+#include <ctype.h>
+#include <stddef.h>
+#include <string.h>
+#include <string>
+#include <vector>
#include <iostream>
#include <sstream>
// ---------------------------------------------------------------------
/* Set the defaults for operation. The default mode with no loaded policy
file matches the V0 policy engine. */
-pkgPolicy::pkgPolicy(pkgCache *Owner) : Pins(0), PFPriority(0), Cache(Owner)
+pkgPolicy::pkgPolicy(pkgCache *Owner) : Pins(nullptr), VerPins(nullptr),
+ PFPriority(nullptr), Cache(Owner), d(NULL)
{
- if (Owner == 0 || &(Owner->Head()) == 0)
+ if (Owner == 0)
return;
PFPriority = new signed short[Owner->Head().PackageFileCount];
Pins = new Pin[Owner->Head().PackageCount];
+ VerPins = new Pin[Owner->Head().VersionCount];
for (unsigned long I = 0; I != Owner->Head().PackageCount; I++)
Pins[I].Type = pkgVersionMatch::None;
+ for (unsigned long I = 0; I != Owner->Head().VersionCount; I++)
+ VerPins[I].Type = pkgVersionMatch::None;
// The config file has a master override.
string DefRel = _config->Find("APT::Default-Release");
pkgVersionMatch vm("", pkgVersionMatch::None);
for (pkgCache::PkgFileIterator F = Cache->FileBegin(); F != Cache->FileEnd(); ++F)
{
- if ((F->Archive != 0 && vm.ExpressionMatches(DefRel, F.Archive()) == true) ||
- (F->Codename != 0 && vm.ExpressionMatches(DefRel, F.Codename()) == true) ||
- (F->Version != 0 && vm.ExpressionMatches(DefRel, F.Version()) == true) ||
+ if (vm.ExpressionMatches(DefRel, F.Archive()) ||
+ vm.ExpressionMatches(DefRel, F.Codename()) ||
+ vm.ExpressionMatches(DefRel, F.Version()) ||
(DefRel.length() > 2 && DefRel[1] == '='))
found = true;
}
for (pkgCache::PkgFileIterator I = Cache->FileBegin(); I != Cache->FileEnd(); ++I)
{
PFPriority[I->ID] = 500;
- if ((I->Flags & pkgCache::Flag::NotSource) == pkgCache::Flag::NotSource)
+ if (I.Flagged(pkgCache::Flag::NotSource))
PFPriority[I->ID] = 100;
- else if ((I->Flags & pkgCache::Flag::ButAutomaticUpgrades) == pkgCache::Flag::ButAutomaticUpgrades)
+ else if (I.Flagged(pkgCache::Flag::ButAutomaticUpgrades))
PFPriority[I->ID] = 100;
- else if ((I->Flags & pkgCache::Flag::NotAutomatic) == pkgCache::Flag::NotAutomatic)
+ else if (I.Flagged(pkgCache::Flag::NotAutomatic))
PFPriority[I->ID] = 1;
}
// Apply the defaults..
- SPtrArray<bool> Fixed = new bool[Cache->HeaderP->PackageFileCount];
- memset(Fixed,0,sizeof(*Fixed)*Cache->HeaderP->PackageFileCount);
- signed Cur = 989;
+ std::unique_ptr<bool[]> Fixed(new bool[Cache->HeaderP->PackageFileCount]);
+ memset(Fixed.get(),0,sizeof(Fixed[0])*Cache->HeaderP->PackageFileCount);
StatusOverride = false;
- for (vector<Pin>::const_iterator I = Defaults.begin(); I != Defaults.end();
- ++I, --Cur)
+ for (vector<Pin>::const_iterator I = Defaults.begin(); I != Defaults.end(); ++I)
{
pkgVersionMatch Match(I->Data,I->Type);
for (pkgCache::PkgFileIterator F = Cache->FileBegin(); F != Cache->FileEnd(); ++F)
{
- if (Match.FileMatch(F) == true && Fixed[F->ID] == false)
+ if (Fixed[F->ID] == false && Match.FileMatch(F) == true)
{
- if (I->Priority != 0 && I->Priority > 0)
- Cur = I->Priority;
-
- if (I->Priority < 0)
- PFPriority[F->ID] = I->Priority;
- else
- PFPriority[F->ID] = Cur;
-
- if (PFPriority[F->ID] > 1000)
+ PFPriority[F->ID] = I->Priority;
+
+ if (PFPriority[F->ID] >= 1000)
StatusOverride = true;
-
+
Fixed[F->ID] = true;
- }
- }
+ }
+ }
}
if (_config->FindB("Debug::pkgPolicy",false) == true)
for (pkgCache::PkgFileIterator F = Cache->FileBegin(); F != Cache->FileEnd(); ++F)
- std::clog << "Prio of " << F.FileName() << ' ' << PFPriority[F->ID] << std::endl;
-
- return true;
+ std::clog << "Prio of " << F.FileName() << ' ' << PFPriority[F->ID] << std::endl;
+
+ return true;
}
/*}}}*/
// Policy::GetCandidateVer - Get the candidate install version /*{{{*/
best package is. */
pkgCache::VerIterator pkgPolicy::GetCandidateVer(pkgCache::PkgIterator const &Pkg)
{
- // Look for a package pin and evaluate it.
- signed Max = GetPriority(Pkg);
- pkgCache::VerIterator Pref = GetMatch(Pkg);
-
- // Alternatives in case we can not find our package pin (Bug#512318).
- signed MaxAlt = 0;
- pkgCache::VerIterator PrefAlt;
-
- // no package = no candidate version
- if (Pkg.end() == true)
- return Pref;
-
- // packages with a pin lower than 0 have no newer candidate than the current version
- if (Max < 0)
- return Pkg.CurrentVer();
-
- /* Falling through to the default version.. Setting Max to zero
- effectively excludes everything <= 0 which are the non-automatic
- priorities.. The status file is given a prio of 100 which will exclude
- not-automatic sources, except in a single shot not-installed mode.
- The second pseduo-status file is at prio 1000, above which will permit
- the user to force-downgrade things.
-
- The user pin is subject to the same priority rules as default
- selections. Thus there are two ways to create a pin - a pin that
- tracks the default when the default is taken away, and a permanent
- pin that stays at that setting.
- */
- bool PrefSeen = false;
- for (pkgCache::VerIterator Ver = Pkg.VersionList(); Ver.end() == false; ++Ver)
- {
- /* Lets see if this version is the installed version */
- bool instVer = (Pkg.CurrentVer() == Ver);
+ pkgCache::VerIterator cand;
+ pkgCache::VerIterator cur = Pkg.CurrentVer();
+ int candPriority = -1;
+ pkgVersioningSystem *vs = Cache->VS;
- if (Pref == Ver)
- PrefSeen = true;
-
- for (pkgCache::VerFileIterator VF = Ver.FileList(); VF.end() == false; ++VF)
- {
- /* If this is the status file, and the current version is not the
- version in the status file (ie it is not installed, or somesuch)
- then it is not a candidate for installation, ever. This weeds
- out bogus entries that may be due to config-file states, or
- other. */
- if ((VF.File()->Flags & pkgCache::Flag::NotSource) == pkgCache::Flag::NotSource &&
- instVer == false)
- continue;
+ for (pkgCache::VerIterator ver = Pkg.VersionList(); ver.end() == false; ++ver) {
+ int priority = GetPriority(ver, true);
- signed Prio = PFPriority[VF.File()->ID];
- if (Prio > Max)
- {
- Pref = Ver;
- Max = Prio;
- PrefSeen = true;
- }
- if (Prio > MaxAlt)
- {
- PrefAlt = Ver;
- MaxAlt = Prio;
- }
- }
+ if (priority == 0 || priority <= candPriority)
+ continue;
- if (instVer == true && Max < 1000)
- {
- /* Not having seen the Pref yet means we have a specific pin below 1000
- on a version below the current installed one, so ignore the specific pin
- as this would be a downgrade otherwise */
- if (PrefSeen == false || Pref.end() == true)
- {
- Pref = Ver;
- PrefSeen = true;
- }
- /* Elevate our current selection (or the status file itself)
- to the Pseudo-status priority. */
- Max = 1000;
+ // TODO: Maybe optimize to not compare versions
+ if (!cur.end() && priority < 1000
+ && (vs->CmpVersion(ver.VerStr(), cur.VerStr()) < 0))
+ continue;
- // Fast path optimize.
- if (StatusOverride == false)
- break;
- }
+ candPriority = priority;
+ cand = ver;
}
- // If we do not find our candidate, use the one with the highest pin.
- // This means that if there is a version available with pin > 0; there
- // will always be a candidate (Closes: #512318)
- if (!Pref.IsGood() && MaxAlt > 0)
- Pref = PrefAlt;
- return Pref;
+ return cand;
}
/*}}}*/
// Policy::CreatePin - Create an entry in the pin table.. /*{{{*/
P->Priority = Priority;
P->Data = Data;
matched = true;
+
+ // Find matching version(s) and copy the pin into it
+ pkgVersionMatch Match(P->Data,P->Type);
+ for (pkgCache::VerIterator Ver = Pkg.VersionList(); Ver.end() != true; ++Ver)
+ {
+ if (Match.VersionMatches(Ver)) {
+ Pin *VP = VerPins + Ver->ID;
+ if (VP->Type == pkgVersionMatch::None)
+ *VP = *P;
+ }
+ }
}
}
// Policy::GetPriority - Get the priority of the package pin /*{{{*/
// ---------------------------------------------------------------------
/* */
-signed short pkgPolicy::GetPriority(pkgCache::PkgIterator const &Pkg)
+APT_PURE signed short pkgPolicy::GetPriority(pkgCache::PkgIterator const &Pkg)
{
if (Pins[Pkg->ID].Type != pkgVersionMatch::None)
- {
- // In this case 0 means default priority
- if (Pins[Pkg->ID].Priority == 0)
- return 989;
return Pins[Pkg->ID].Priority;
- }
-
return 0;
}
-signed short pkgPolicy::GetPriority(pkgCache::PkgFileIterator const &File)
+APT_PURE signed short pkgPolicy::GetPriority(pkgCache::VerIterator const &Ver, bool ConsiderFiles)
{
- return PFPriority[File->ID];
-}
- /*}}}*/
-// PreferenceSection class - Overriding the default TrimRecord method /*{{{*/
-// ---------------------------------------------------------------------
-/* The preference file is a user generated file so the parser should
- therefore be a bit more friendly by allowing comments and new lines
- all over the place rather than forcing a special format */
-class PreferenceSection : public pkgTagSection
-{
- void TrimRecord(bool BeforeRecord, const char* &End)
+ if (VerPins[Ver->ID].Type != pkgVersionMatch::None)
+ return VerPins[Ver->ID].Priority;
+ if (!ConsiderFiles)
+ return 0;
+
+ // priorities are short ints, but we want to pick a value outside the valid range here
+ auto priority = std::numeric_limits<signed int>::min();
+ for (pkgCache::VerFileIterator file = Ver.FileList(); file.end() == false; file++)
{
- for (; Stop < End && (Stop[0] == '\n' || Stop[0] == '\r' || Stop[0] == '#'); Stop++)
- if (Stop[0] == '#')
- Stop = (const char*) memchr(Stop,'\n',End-Stop);
+ /* If this is the status file, and the current version is not the
+ version in the status file (ie it is not installed, or somesuch)
+ then it is not a candidate for installation, ever. This weeds
+ out bogus entries that may be due to config-file states, or
+ other. */
+ if (file.File().Flagged(pkgCache::Flag::NotSource) && Ver.ParentPkg().CurrentVer() != Ver)
+ priority = std::max(priority, static_cast<decltype(priority)>(-1));
+ else
+ priority = std::max(priority, static_cast<decltype(priority)>(GetPriority(file.File())));
}
-};
+
+ return priority == std::numeric_limits<decltype(priority)>::min() ? 0 : priority;
+}
+APT_PURE signed short pkgPolicy::GetPriority(pkgCache::PkgFileIterator const &File)
+{
+ return PFPriority[File->ID];
+}
/*}}}*/
// ReadPinDir - Load the pin files from this dir into a Policy /*{{{*/
// ---------------------------------------------------------------------
bool ReadPinDir(pkgPolicy &Plcy,string Dir)
{
if (Dir.empty() == true)
- Dir = _config->FindDir("Dir::Etc::PreferencesParts");
+ Dir = _config->FindDir("Dir::Etc::PreferencesParts", "/dev/null");
if (DirectoryExists(Dir) == false)
{
- _error->WarningE("DirectoryExists",_("Unable to read %s"),Dir.c_str());
+ if (APT::String::Endswith(Dir, "/dev/null") == false)
+ _error->WarningE("DirectoryExists",_("Unable to read %s"),Dir.c_str());
return true;
}
+ _error->PushToStack();
vector<string> const List = GetListOfFilesInDir(Dir, "pref", true, true);
+ bool const PendingErrors = _error->PendingError();
+ _error->MergeWithStack();
+ if (PendingErrors)
+ return false;
// Read the files
for (vector<string>::const_iterator I = List.begin(); I != List.end(); ++I)
return true;
FileFd Fd(File,FileFd::ReadOnly);
- pkgTagFile TF(&Fd);
- if (_error->PendingError() == true)
+ pkgTagFile TF(&Fd, pkgTagFile::SUPPORT_COMMENTS);
+ if (Fd.IsOpen() == false || Fd.Failed())
return false;
-
- PreferenceSection Tags;
+
+ pkgTagSection Tags;
while (TF.Step(Tags) == true)
{
// can happen when there are only comments in a record
}
for (; Word != End && isspace(*Word) != 0; Word++);
- short int priority = Tags.FindI("Pin-Priority", 0);
+ _error->PushToStack();
+ int const priority = Tags.FindI("Pin-Priority", 0);
+ bool const newError = _error->PendingError();
+ _error->MergeWithStack();
+ if (priority < std::numeric_limits<short>::min() ||
+ priority > std::numeric_limits<short>::max() ||
+ newError) {
+ return _error->Error(_("%s: Value %s is outside the range of valid pin priorities (%d to %d)"),
+ File.c_str(), Tags.FindS("Pin-Priority").c_str(),
+ std::numeric_limits<short>::min(),
+ std::numeric_limits<short>::max());
+ }
if (priority == 0)
{
- _error->Warning(_("No priority (or zero) specified for pin"));
- continue;
+ return _error->Error(_("No priority (or zero) specified for pin"));
}
istringstream s(Name);
return true;
}
/*}}}*/
+
+pkgPolicy::~pkgPolicy() {delete [] PFPriority; delete [] Pins; delete [] VerPins; }
projects / apt.git / blobdiff