/usr/include/mongo/s/ is in mongodb-dev 1:2.4.9-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/mongo/s/balance.h
/usr/include/mongo/s/balancer_policy.h
/usr/include/mongo/s/chunk.h
/usr/include/mongo/s/chunk_diff.h
/usr/include/mongo/s/chunk_diff.hpp
/usr/include/mongo/s/chunk_version.h
/usr/include/mongo/s/client_info.h
/usr/include/mongo/s/cluster_client_internal.h
/usr/include/mongo/s/collection_manager.h
/usr/include/mongo/s/config.h
/usr/include/mongo/s/config_server_checker_service.h
/usr/include/mongo/s/config_upgrade.h
/usr/include/mongo/s/config_upgrade_helpers.h
/usr/include/mongo/s/cursors.h
/usr/include/mongo/s/d_chunk_manager.h
/usr/include/mongo/s/d_logic.h
/usr/include/mongo/s/d_writeback.h
/usr/include/mongo/s/field_parser-inl.h
/usr/include/mongo/s/field_parser.h
/usr/include/mongo/s/grid.h
/usr/include/mongo/s/interrupt_status_mongos.h
/usr/include/mongo/s/metadata_loader.h
/usr/include/mongo/s/mongo_version_range.h
/usr/include/mongo/s/request.h
/usr/include/mongo/s/server.h
/usr/include/mongo/s/shard.h
/usr/include/mongo/s/shardkey.h
/usr/include/mongo/s/stale_exception.h
/usr/include/mongo/s/strategy.h
/usr/include/mongo/s/type_changelog.h
/usr/include/mongo/s/type_chunk.h
/usr/include/mongo/s/type_collection.h
/usr/include/mongo/s/type_config_version.h
/usr/include/mongo/s/type_database.h
/usr/include/mongo/s/type_lockpings.h
/usr/include/mongo/s/type_locks.h
/usr/include/mongo/s/type_mongos.h
/usr/include/mongo/s/type_settings.h
/usr/include/mongo/s/type_shard.h
/usr/include/mongo/s/type_tags.h
/usr/include/mongo/s/version_manager.h
/usr/include/mongo/s/writeback_listener.h
/usr/include/mongo/scripting/bench.h
/usr/include/mongo/scripting/bson_template_evaluator.h
/usr/include/mongo/scripting/engine.h
/usr/include/mongo/scripting/engine_spidermonkey.h
/usr/include/mongo/scripting/engine_spidermonkey_internal.h
/usr/include/mongo/scripting/engine_v8.h
/usr/include/mongo/scripting/v8_db.h
/usr/include/mongo/scripting/v8_deadline_monitor.h
/usr/include/mongo/scripting/v8_profiler.h
/usr/include/mongo/scripting/v8_utils.h
/usr/include/mongo/shell/linenoise.h
/usr/include/mongo/shell/linenoise_utf8.h
/usr/include/mongo/shell/mk_wcwidth.h
/usr/include/mongo/shell/shell_utils.h
/usr/include/mongo/shell/shell_utils_extended.h
/usr/include/mongo/shell/shell_utils_launcher.h