6cc7eb4714
POSIX permits an indefinite required buffer size for querying GECOS fields. This is currently used in three locations. Previously, paludis would assume that it could perform a sysconf call to retrieve the requisite buffer size for ensuring that the subsequent GECOS field query would not receive a -ERANGE error. However, as it turns out, this is actually a problem even with GLIBC where the NSS may end up querying a service which has a larger field value for the `struct pwd` (glibc sets the return value to the NSS buffer length, aka 1k, but may end up querying a service which provides a larger response). Use local wrappers which perform the size adjustment to avoid an undersized buffer. Localise the functions which query the various GECOS fields which comprise the persona into util.
336 lines
8.9 KiB
C++
336 lines
8.9 KiB
C++
/* vim: set sw=4 sts=4 et foldmethod=syntax : */
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/*
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* Copyright (c) 2009, 2010, 2011, 2013, 2014 Ciaran McCreesh
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*
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* This file is part of the Paludis package manager. Paludis is free software;
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* you can redistribute it and/or modify it under the terms of the GNU General
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* Public License version 2, as published by the Free Software Foundation.
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*
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* Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <paludis/repositories/accounts/installed_accounts_id.hh>
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#include <paludis/repositories/accounts/accounts_dep_key.hh>
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#include <paludis/util/pimp-impl.hh>
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#include <paludis/util/config_file.hh>
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#include <paludis/util/options.hh>
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#include <paludis/util/persona.hh>
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#include <paludis/util/stringify.hh>
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#include <paludis/util/hashes.hh>
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#include <paludis/util/visitor_cast.hh>
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#include <paludis/util/tokeniser.hh>
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#include <paludis/util/make_named_values.hh>
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#include <paludis/util/log.hh>
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#include <paludis/util/singleton-impl.hh>
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#include <paludis/name.hh>
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#include <paludis/version_spec.hh>
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#include <paludis/literal_metadata_key.hh>
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#include <paludis/repository.hh>
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#include <paludis/action.hh>
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#include <paludis/user_dep_spec.hh>
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#include <sys/types.h>
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#include <pwd.h>
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#include <grp.h>
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#include <unistd.h>
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#include <list>
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#include <vector>
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using namespace paludis;
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using namespace paludis::accounts_repository;
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namespace
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{
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struct InstalledAccountsIDBehaviours :
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Singleton<InstalledAccountsIDBehaviours>
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{
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std::shared_ptr<Set<std::string> > behaviours_value;
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std::shared_ptr<LiteralMetadataStringSetKey> behaviours_key;
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InstalledAccountsIDBehaviours() :
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behaviours_value(std::make_shared<Set<std::string>>()),
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behaviours_key(std::make_shared<LiteralMetadataStringSetKey>("behaviours", "behaviours", mkt_internal, behaviours_value))
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{
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behaviours_value->insert("transient");
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behaviours_value->insert("used");
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behaviours_value->insert("unbinaryable");
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}
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};
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}
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namespace paludis
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{
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template <>
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struct Imp<InstalledAccountsID>
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{
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const Environment * const env;
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const QualifiedPackageName name;
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const VersionSpec version;
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const RepositoryName repository_name;
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const std::shared_ptr<const LiteralMetadataStringSetKey> behaviours_key;
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mutable std::mutex mutex;
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mutable std::shared_ptr<const AccountsDepKey> dependencies_key;
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const bool is_user;
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Imp(const Environment * const e,
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const QualifiedPackageName & q, const RepositoryName & r,
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const bool u) :
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env(e),
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name(q),
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version("0", { }),
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repository_name(r),
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behaviours_key(InstalledAccountsIDBehaviours::get_instance()->behaviours_key),
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is_user(u)
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{
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}
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};
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}
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InstalledAccountsID::InstalledAccountsID(const Environment * const e,
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const QualifiedPackageName & q, const RepositoryName & r, const bool u) :
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_imp(e, q, r, u)
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{
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add_metadata_key(_imp->behaviours_key);
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}
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InstalledAccountsID::~InstalledAccountsID()
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{
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}
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void
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InstalledAccountsID::need_keys_added() const
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{
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std::unique_lock<std::mutex> lock(_imp->mutex);
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if (_imp->is_user && ! _imp->dependencies_key)
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{
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std::shared_ptr<Set<std::string> > groups(std::make_shared<Set<std::string>>());
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/* depend upon our primary group */
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{
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struct passwd pwd;
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struct passwd *result;
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std::vector<char> buffer;
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if (0 == getpwnam_r_s(stringify(name().package()).c_str(), buffer, pwd, result) || result == nullptr)
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{
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struct group grp;
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struct group *result;
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std::vector<char> buffer;
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if (0 == getgrgid_r_s(pwd.pw_gid, buffer, grp, result) && nullptr != result)
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{
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/* really we should only do this if the group in question is managed by accounts. Users
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* might have accounts installed by hand with a group that's unmanaged. */
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groups->insert(stringify(grp.gr_name));
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}
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else
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Log::get_instance()->message("accounts.getgrgid_r", ll_warning, lc_context)
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<< "getgrgid_r failed for " << name();
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}
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else
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Log::get_instance()->message("accounts.getpwnam_r", ll_warning, lc_context)
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<< "getpwnam_r failed for " << name();
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}
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/* ...and our secondary groups */
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{
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/* first person who gets annoyed by this not existing gets to implement it. */
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}
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_imp->dependencies_key = std::make_shared<AccountsDepKey>(_imp->env, groups);
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add_metadata_key(_imp->dependencies_key);
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}
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}
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void
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InstalledAccountsID::clear_metadata_keys() const
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{
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}
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void
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InstalledAccountsID::need_masks_added() const
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{
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}
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const QualifiedPackageName
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InstalledAccountsID::name() const
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{
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return _imp->name;
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}
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const VersionSpec
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InstalledAccountsID::version() const
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{
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return _imp->version;
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}
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const RepositoryName
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InstalledAccountsID::repository_name() const
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{
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return _imp->repository_name;
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}
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const std::string
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InstalledAccountsID::canonical_form(const PackageIDCanonicalForm f) const
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{
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switch (f)
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{
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case idcf_full:
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return stringify(name()) + "-" + stringify(version()) + "::" + stringify(repository_name());
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case idcf_no_version:
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return stringify(name()) + "::" + stringify(repository_name());
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case idcf_version:
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return stringify(version());
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case idcf_no_name:
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return stringify(version()) + "::" + stringify(repository_name());
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case last_idcf:
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break;
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}
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throw InternalError(PALUDIS_HERE, "Bad PackageIDCanonicalForm");
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}
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PackageDepSpec
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InstalledAccountsID::uniquely_identifying_spec() const
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{
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return parse_user_package_dep_spec(stringify(name()) + "::" + stringify(repository_name()), _imp->env, { });
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}
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const std::shared_ptr<const MetadataCollectionKey<KeywordNameSet> >
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InstalledAccountsID::keywords_key() const
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{
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return nullptr;
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}
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const std::shared_ptr<const MetadataSpecTreeKey<DependencySpecTree> >
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InstalledAccountsID::build_dependencies_key() const
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{
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return nullptr;
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}
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const std::shared_ptr<const MetadataSpecTreeKey<DependencySpecTree> >
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InstalledAccountsID::run_dependencies_key() const
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{
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need_keys_added();
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return _imp->dependencies_key;
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}
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const std::shared_ptr<const MetadataSpecTreeKey<DependencySpecTree> >
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InstalledAccountsID::post_dependencies_key() const
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{
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return nullptr;
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}
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const std::shared_ptr<const MetadataSpecTreeKey<DependencySpecTree> >
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InstalledAccountsID::dependencies_key() const
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{
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need_keys_added();
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return _imp->dependencies_key;
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}
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const std::shared_ptr<const MetadataSpecTreeKey<FetchableURISpecTree> >
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InstalledAccountsID::fetches_key() const
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{
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return nullptr;
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}
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const std::shared_ptr<const MetadataSpecTreeKey<SimpleURISpecTree> >
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InstalledAccountsID::homepage_key() const
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{
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return nullptr;
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}
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const std::shared_ptr<const MetadataValueKey<std::string> >
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InstalledAccountsID::short_description_key() const
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{
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return nullptr;
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}
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const std::shared_ptr<const MetadataValueKey<std::string> >
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InstalledAccountsID::long_description_key() const
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{
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return nullptr;
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}
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const std::shared_ptr<const MetadataTimeKey>
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InstalledAccountsID::installed_time_key() const
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{
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return nullptr;
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}
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const std::shared_ptr<const MetadataCollectionKey<Set<std::string> > >
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InstalledAccountsID::from_repositories_key() const
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{
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return nullptr;
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}
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const std::shared_ptr<const MetadataValueKey<FSPath> >
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InstalledAccountsID::fs_location_key() const
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{
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return nullptr;
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}
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const std::shared_ptr<const MetadataCollectionKey<Set<std::string> > >
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InstalledAccountsID::behaviours_key() const
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{
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return _imp->behaviours_key;
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}
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const std::shared_ptr<const MetadataValueKey<std::shared_ptr<const Choices> > >
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InstalledAccountsID::choices_key() const
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{
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return nullptr;
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}
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const std::shared_ptr<const MetadataValueKey<Slot> >
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InstalledAccountsID::slot_key() const
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{
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return nullptr;
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}
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bool
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InstalledAccountsID::arbitrary_less_than_comparison(const PackageID &) const
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{
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return false;
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}
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std::size_t
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InstalledAccountsID::extra_hash_value() const
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{
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return 0;
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}
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bool
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InstalledAccountsID::supports_action(const SupportsActionTestBase &) const
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{
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return false;
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}
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void
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InstalledAccountsID::perform_action(Action & action) const
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{
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throw ActionFailedError("Unsupported action: " + action.simple_name());
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}
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const std::shared_ptr<const Contents>
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InstalledAccountsID::contents() const
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{
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return nullptr;
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}
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