From 7ec343309b7bc6001b465c870609b3c570026149 Mon Sep 17 00:00:00 2001 From: David Kalnischkies Date: Thu, 21 Jul 2016 18:46:34 +0200 Subject: [PATCH] don't purge directly, but remove and do purge at the end If we want a package to be purged from the system tell dpkg in the ordering (if it has to touch it explicitly) to remove it and cover the purging of the config files at the end with a --purge --pending call. That should help packages move conffiles around between packages correctly even if the user is purging packages directly in big actions like dist-upgrades involving many packages. --- apt-pkg/deb/dpkgpm.cc | 147 ++++++++++-------- .../test-no-fds-leaked-to-maintainer-scripts | 4 +- 2 files changed, 88 insertions(+), 63 deletions(-) diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc index e4f9550b0..b47988d6c 100644 --- a/apt-pkg/deb/dpkgpm.cc +++ b/apt-pkg/deb/dpkgpm.cc @@ -51,6 +51,7 @@ #include #include #include +#include #include #include #include @@ -1273,6 +1274,15 @@ static void cleanUpTmpDir(char * const tmpdir) /*{{{*/ */ bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress) { + // we remove the last configures (and after that removes) from the list here + // as they will be covered by the pending calls, so explicit calls are busy work + decltype(List)::const_iterator::difference_type const explicitIdx = + std::distance(List.cbegin(), + _config->FindB("Dpkg::ExplicitLastConfigure", false) ? List.cend() : + std::find_if_not( + std::find_if_not(List.crbegin(), List.crend(), [](Item const &i) { return i.Op == Item::Configure; }), + List.crend(), [](Item const &i) { return i.Op == Item::Remove || i.Op == Item::Purge; }).base()); + auto const ItemIsEssential = [](pkgDPkgPM::Item const &I) { static auto const cachegen = _config->Find("pkgCacheGen::Essential"); if (cachegen == "none" || cachegen == "native") @@ -1282,6 +1292,13 @@ bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress) return (I.Pkg->Flags & pkgCache::Flag::Essential) != 0; }; + auto const StripAlreadyDoneFromPending = [&](APT::VersionVector & Pending) { + Pending.erase(std::remove_if(Pending.begin(), Pending.end(), [&](pkgCache::VerIterator const &Ver) { + auto const PN = Ver.ParentPkg().FullName(); + return PackageOps[PN].size() <= PackageOpsDone[PN]; + }), Pending.end()); + }; + pkgPackageManager::SigINTStop = false; d->progress = progress; @@ -1329,28 +1346,9 @@ bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress) // FIXME: workaround for dpkg bug, see our ./test-bug-740843-versioned-up-down-breaks test bool const dpkg_recursive_install_numbered = _config->FindB("dpkg::install::recursive::numbered", true); - decltype(List)::const_iterator::difference_type const notconfidx = - _config->FindB("Dpkg::ExplicitLastConfigure", false) ? std::numeric_limits::max() : - std::distance(List.cbegin(), std::find_if_not(List.crbegin(), List.crend(), [](Item const &i) { return i.Op == Item::Configure; }).base()); - - // support subpressing of triggers processing for special - // cases like d-i that runs the triggers handling manually - bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false); - bool const ConfigurePending = _config->FindB("DPkg::ConfigurePending", true); - if (ConfigurePending) - List.push_back(Item(Item::ConfigurePending, PkgIterator())); - // for the progress BuildPackagesProgressMap(); - if (notconfidx != std::numeric_limits::max()) - { - if (ConfigurePending) - List.erase(std::next(List.begin(), notconfidx), std::prev(List.end())); - else - List.erase(std::next(List.begin(), notconfidx), List.end()); - } - APT::StateChanges currentStates; if (_config->FindB("dpkg::selection::current::saveandrestore", true)) { @@ -1388,34 +1386,29 @@ bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress) return false; } - { - std::vector toBeRemoved(Cache.Head().PackageCount, false); - std::vector toBePurged(Cache.Head().PackageCount, false); - for (auto Pkg = Cache.PkgBegin(); Pkg.end() == false; ++Pkg) - if (Cache[Pkg].Purge()) - toBePurged[Pkg->ID] = true; - else if (Cache[Pkg].Delete()) - toBeRemoved[Pkg->ID] = true; - for (auto && I: approvedStates.Remove()) - toBeRemoved[I.ParentPkg()->ID] = false; - for (auto && I: approvedStates.Purge()) - toBePurged[I.ParentPkg()->ID] = false; - if (std::find(toBeRemoved.begin(), toBeRemoved.end(), true) != toBeRemoved.end()) - { - if (ConfigurePending) - List.emplace(std::prev(List.end()), Item::RemovePending, pkgCache::PkgIterator()); - else - List.emplace_back(Item::RemovePending, pkgCache::PkgIterator()); - } - if (std::find(toBePurged.begin(), toBePurged.end(), true) != toBePurged.end()) - { - if (ConfigurePending) - List.emplace(std::prev(List.end()), Item::PurgePending, pkgCache::PkgIterator()); - else - List.emplace_back(Item::PurgePending, pkgCache::PkgIterator()); - } - } + List.erase(std::next(List.begin(), explicitIdx), List.end()); + + std::vector toBeRemoved(Cache.Head().PackageCount, false); + for (auto && I: approvedStates.Remove()) + toBeRemoved[I.ParentPkg()->ID] = true; + for (auto && I: approvedStates.Purge()) + toBeRemoved[I.ParentPkg()->ID] = true; + + for (auto && I: List) + if (I.Op == Item::Remove || I.Op == Item::Purge) + toBeRemoved[I.Pkg->ID] = false; + + if (std::find(toBeRemoved.begin(), toBeRemoved.end(), true) != toBeRemoved.end()) + List.emplace_back(Item::RemovePending, pkgCache::PkgIterator()); + if (approvedStates.Purge().empty() == false) + List.emplace_back(Item::PurgePending, pkgCache::PkgIterator()); + + // support subpressing of triggers processing for special + // cases like d-i that runs the triggers handling manually + if (_config->FindB("DPkg::ConfigurePending", true)) + List.emplace_back(Item::ConfigurePending, pkgCache::PkgIterator()); } + bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false); d->stdin_is_dev_null = false; @@ -1431,7 +1424,7 @@ bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress) d->progress->Start(d->master); // this loop is runs once per dpkg operation - vector::const_iterator I = List.begin(); + vector::const_iterator I = List.cbegin(); while (I != List.end()) { // Do all actions with the same Op in one run @@ -1448,9 +1441,10 @@ bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress) continue; break; } + else if (J->Op == Item::Remove || J->Op == Item::Purge) + J = std::find_if(J, List.cend(), [](Item const &I) { return I.Op != Item::Remove && I.Op != Item::Purge; }); else - for (; J != List.end() && J->Op == I->Op; ++J) - /* nothing */; + J = std::find_if(J, List.cend(), [&J](Item const &I) { return I.Op != J->Op; }); auto const size = (J - I) + 10; @@ -1483,17 +1477,11 @@ bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress) switch (I->Op) { case Item::Remove: - ADDARGC("--force-depends"); - if (std::any_of(I, J, ItemIsEssential)) - ADDARGC("--force-remove-essential"); - ADDARGC("--remove"); - break; - case Item::Purge: ADDARGC("--force-depends"); if (std::any_of(I, J, ItemIsEssential)) ADDARGC("--force-remove-essential"); - ADDARGC("--purge"); + ADDARGC("--remove"); break; case Item::Configure: @@ -1569,10 +1557,37 @@ bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress) } } } + else if (I->Op == Item::RemovePending) + { + ++I; + StripAlreadyDoneFromPending(approvedStates.Remove()); + if (approvedStates.Remove().empty()) + continue; + } + else if (I->Op == Item::PurgePending) + { + ++I; + // explicit removes of packages without conffiles passthrough the purge states instantly, too. + // Setting these non-installed packages up for purging generates 'unknown pkg' warnings from dpkg + StripAlreadyDoneFromPending(approvedStates.Purge()); + if (approvedStates.Purge().empty()) + continue; + std::remove_reference::type approvedRemoves; + std::swap(approvedRemoves, approvedStates.Remove()); + // we apply it again here as an explicit remove in the ordering will have cleared the purge state + if (approvedStates.Save(false) == false) + { + _error->Error("Couldn't record the approved purges as dpkg selection states"); + if (currentStates.Save(false) == false) + _error->Error("Couldn't restore dpkg selection states which were present before this interaction!"); + return false; + } + std::swap(approvedRemoves, approvedStates.Remove()); + } else { string const nativeArch = _config->Find("APT::Architecture"); - unsigned long const oldSize = I->Op == Item::Configure ? Size : 0; + unsigned long const oldSize = I->Pkg.end() == false ? Size : 0; for (;I != J && Size < MaxArgBytes; ++I) { if((*I).Pkg.end() == true) @@ -1591,8 +1606,15 @@ bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress) { pkgCache::VerIterator PkgVer; std::string name = I->Pkg.Name(); - if (Op == Item::Remove || Op == Item::Purge) - PkgVer = FindToBeRemovedVersion(I->Pkg); + if (Op == Item::Remove) + PkgVer = I->Pkg.CurrentVer(); + else if (Op == Item::Purge) + { + // we purge later with --purge --pending, so if it isn't installed (aka rc-only), skip it here + PkgVer = I->Pkg.CurrentVer(); + if (PkgVer.end() == true) + continue; + } else PkgVer = Cache[I->Pkg].InstVerIter(Cache); if (strcmp(I->Pkg.Arch(), "none") == 0) @@ -1798,11 +1820,14 @@ bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress) if (d->dpkg_error.empty() == false) { + // no point in reseting packages we already completed removal for + StripAlreadyDoneFromPending(approvedStates.Remove()); + StripAlreadyDoneFromPending(approvedStates.Purge()); APT::StateChanges undo; auto && undoRem = approvedStates.Remove(); - std::move(undoRem.begin(), undoRem.end(), std::back_inserter(undo.Remove())); + std::move(undoRem.begin(), undoRem.end(), std::back_inserter(undo.Install())); auto && undoPur = approvedStates.Purge(); - std::move(undoPur.begin(), undoPur.end(), std::back_inserter(undo.Purge())); + std::move(undoPur.begin(), undoPur.end(), std::back_inserter(undo.Install())); approvedStates.clear(); if (undo.Save(false) == false) _error->Error("Couldn't revert dpkg selection for approved remove/purge after an error was encountered!"); diff --git a/test/integration/test-no-fds-leaked-to-maintainer-scripts b/test/integration/test-no-fds-leaked-to-maintainer-scripts index 56cbff095..a9c198580 100755 --- a/test/integration/test-no-fds-leaked-to-maintainer-scripts +++ b/test/integration/test-no-fds-leaked-to-maintainer-scripts @@ -34,7 +34,7 @@ rm -f rootdir/var/log/dpkg.log rootdir/var/log/apt/term.log testsuccess aptget install -y fdleaks -qq < /dev/null checkfdleak() { - msgtest 'Check if fds were not' 'leaked' + msgtest 'Check if fds were not' "leaked: expect $1" if [ "$(grep 'root root' rootdir/tmp/testsuccess.output | wc -l)" = "$1" ]; then msgpass else @@ -73,7 +73,6 @@ checkpurge() { testfileequal 'terminal.log' "$(cat terminal.output)" testequal "startup packages purge -status installed $PKGNAME 1.0 remove $PKGNAME 1.0 status half-configured $PKGNAME 1.0 status half-installed $PKGNAME 1.0 @@ -86,6 +85,7 @@ status config-files $PKGNAME 1.0 status config-files $PKGNAME 1.0 status not-installed $PKGNAME startup packages configure" cut -f 3- -d' ' rootdir/var/log/dpkg.log + testequalor2 "dpkg-query: no packages found matching ${PKGNAME}" "No packages found matching ${PKGNAME}." dpkg -l "$PKGNAME" } checkpurge -- 2.45.2