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/* Copyright © 2005-2013 Roger Leigh <rleigh@debian.org>
*
* schroot is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* schroot is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see
* <http://www.gnu.org/licenses/>.
*
*********************************************************************/
#include <config.h>
#include <sbuild/chroot/chroot.h>
#include <sbuild/chroot/config.h>
#include <sbuild/chroot/facet/factory.h>
#include <sbuild/chroot/facet/session.h>
#include <sbuild/keyfile-writer.h>
#include <sbuild/lock.h>
#include <sbuild/fdstream.h>
#include <sbuild/format-detail.h>
#include <cassert>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <boost/format.hpp>
using boost::format;
using std::endl;
namespace sbuild
{
namespace chroot
{
namespace facet
{
namespace
{
const factory::facet_info session_info =
{
"session",
N_("Support for session chroots"),
false,
[]() -> facet::ptr { return session::create(); }
};
factory session_register(session_info);
}
session::session ():
facet(),
original_chroot_name(),
selected_chroot_name()
{
}
session::~session ()
{
}
session::ptr
session::create ()
{
return ptr(new session());
}
facet::ptr
session::clone () const
{
return ptr(new session(*this));
}
std::string const&
session::get_name () const
{
return session_info.name;
}
std::string const&
session::get_original_name () const
{
return this->original_chroot_name;
}
void
session::set_original_name (const std::string& name)
{
this->original_chroot_name = name;
this->selected_chroot_name = name;
}
std::string const&
session::get_selected_name () const
{
return this->selected_chroot_name;
}
void
session::set_selected_name (const std::string& name)
{
std::string ns, shortname;
config::get_namespace(name, ns, shortname);
this->selected_chroot_name = shortname;
}
void
session::setup_session_info (bool start)
{
/* Create or unlink session information. */
std::string file = std::string(SCHROOT_SESSION_DIR) + "/" + owner->get_name();
if (start)
{
int fd = open(file.c_str(), O_CREAT|O_EXCL|O_WRONLY, 0664);
if (fd < 0)
throw error(file, chroot::SESSION_WRITE, strerror(errno));
// Create a stream from the file descriptor. The fd will be
// closed when the stream is destroyed.
#ifdef BOOST_IOSTREAMS_CLOSE_HANDLE_OLD
fdostream output(fd, true);
#else
fdostream output(fd, boost::iostreams::close_handle);
#endif
output.imbue(std::locale::classic());
file_lock lock(fd);
try
{
lock.set_lock(lock::LOCK_EXCLUSIVE, 2);
}
catch (const lock::error& e)
{
throw error(file, chroot::FILE_LOCK, e);
}
keyfile details;
owner->get_keyfile(details);
output << keyfile_writer(details);
try
{
lock.unset_lock();
}
catch (const lock::error& e)
{
throw error(file, chroot::FILE_UNLOCK, e);
}
}
else /* start == false */
{
if (unlink(file.c_str()) != 0)
throw error(file, chroot::SESSION_UNLINK, strerror(errno));
}
}
void
session::setup_env (environment& env) const
{
// Add original name to environment, but only if set (otherwise
// defaults to session ID).
if (!get_original_name().empty())
env.add("CHROOT_NAME", get_original_name());
if (!get_selected_name().empty())
env.add("CHROOT_ALIAS", get_selected_name());
}
void
session::get_details (format_detail& detail) const
{
if (!get_original_name().empty())
detail.add(_("Original Chroot Name"), get_original_name());
if (!get_original_name().empty())
detail.add(_("Selected Chroot Name"), get_selected_name());
if (!owner->get_name().empty())
detail.add(_("Session ID"), owner->get_name());
}
void
session::get_used_keys (string_list& used_keys) const
{
used_keys.push_back("active");
used_keys.push_back("source-users");
used_keys.push_back("source-groups");
used_keys.push_back("source-root-users");
used_keys.push_back("source-root-groups");
used_keys.push_back("original-name");
used_keys.push_back("selected-name");
}
void
session::get_keyfile (keyfile& keyfile) const
{
keyfile::set_object_value(*this, &session::get_original_name,
keyfile, owner->get_name(),
"original-name");
keyfile::set_object_value(*this, &session::get_selected_name,
keyfile, owner->get_name(),
"selected-name");
}
void
session::set_keyfile (const keyfile& keyfile)
{
keyfile::get_object_value(*this, &session::set_original_name,
keyfile, owner->get_name(),
"original-name",
keyfile::PRIORITY_OPTIONAL);
keyfile::get_object_value(*this, &session::set_selected_name,
keyfile, owner->get_name(),
"selected-name",
keyfile::PRIORITY_OPTIONAL);
}
}
}
}
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