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Simon McVittie 7eacbfece7 bus: Try to raise soft fd limit to match hard limit 
Linux systems have traditionally set the soft limit to 1024 and the hard
limit to 4096. Recent versions of systemd keep the soft fd limit at
1024 to avoid breaking programs that still use select(), but raise the
hard limit to 512*1024, while in recent Debian versions a complicated
interaction between components gives a soft limit of 1024 and a hard
limit of 1024*1024. If we can, we might as well elevate our soft limit
to match the hard limit, minimizing the chance that we will run out of
file descriptor slots.

Unlike the previous code to raise the hard and soft limits to at least
65536, we do this even if we don't have privileges: privileges are
unnecessary to raise the soft limit up to the hard limit.

If we *do* have privileges, we also continue to raise the hard and soft
limits to at least 65536 if they weren't already that high, making
it harder to carry out a denial of service attack on the system bus on
systems that use the traditional limit (CVE-2014-7824).

As was previously the case on the system bus, we'll drop the limits back
to our initial limits before we execute a subprocess for traditional
(non-systemd) activation, if enabled.

systemd activation doesn't involve us starting subprocesses at all,
so in both cases activated services will still inherit the same limits
they did previously.

Reviewed-by: Lennart Poettering <lennart@poettering.net>
[smcv: Correct a comment based on Lennart's review, reword commit message]
Signed-off-by: Simon McVittie <smcv@collabora.com>
2019-04-18 11:54:48 +01:00
..
.gitignore .gitignore: Ignore many more generated files 2018-12-14 13:28:50 +00:00
CMakeLists.txt Fixes remaining indentations that are not covered by the cmake formatting script in CMakeLists.txt files 2019-01-24 09:08:15 +01:00
dbus-address.c embedded tests: Conform to the same API for all tests 2018-12-17 14:12:59 +00:00
dbus-address.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-arch-deps.h.in Remove support for platforms with no 64-bit integer type 2013-09-16 15:31:02 +01:00
dbus-asv-util.c _dbus_asv_add_object_path: Add 2017-11-06 14:07:21 +00:00
dbus-asv-util.h _dbus_asv_add_object_path: Add 2017-11-06 14:07:21 +00:00
dbus-auth.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-auth.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-bus.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-bus.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-connection-internal.h test: Move _dbus_transport_unix_test() here 2019-01-21 15:22:07 +00:00
dbus-connection.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-connection.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-credentials.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-credentials.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-dataslot.c embedded tests: Conform to the same API for all tests 2018-12-17 14:12:59 +00:00
dbus-dataslot.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-errors.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-errors.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-file-unix.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-file-win.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-file.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-file.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-hash.c test: Unembed hash test from libdbus and move it into test/ 2019-01-21 15:20:06 +00:00
dbus-hash.h test: Unembed hash test from libdbus and move it into test/ 2019-01-21 15:20:06 +00:00
dbus-init-win.cpp dbus_threads_init_default, dbus_threads_init: be safe to call at any time 2013-05-10 11:35:08 +01:00
dbus-internals.c test-spawn-oom: Separate single spawn tests from oom related 2019-03-15 17:06:01 +00:00
dbus-internals.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-keyring.c embedded tests: Conform to the same API for all tests 2018-12-17 14:12:59 +00:00
dbus-keyring.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-list.c test: Move _dbus_list_test() here 2019-01-21 15:22:07 +00:00
dbus-list.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-macros.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-mainloop.c Rename structure DBusSocketSet to DBusPollableSet and adjust the corresponding functions/files 2019-01-09 15:20:19 +01:00
dbus-mainloop.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-marshal-basic.c embedded tests: Conform to the same API for all tests 2018-12-17 14:12:59 +00:00
dbus-marshal-basic.h Don't cast user-supplied pointers to DBusBasicValue * 2018-12-11 12:23:06 +00:00
dbus-marshal-byteswap.c Fix warning: "pointer targets in assignment differ in signedness [-Wpointer-sign]". 2015-11-24 12:26:00 +01:00
dbus-marshal-byteswap.h Add DBUS_PRIVATE_EXPORT decoration to symbols used by dbus-daemon or tests 2015-02-20 20:49:36 +00:00
dbus-marshal-header.c DBusMessage: Add a header field for the container instance 2018-02-16 15:27:37 +00:00
dbus-marshal-header.h _dbus_message_remove_unknown_fields: Add 2018-01-11 18:34:39 +00:00
dbus-marshal-recursive.c Don't cast user-supplied pointers to DBusBasicValue * 2018-12-11 12:23:06 +00:00
dbus-marshal-recursive.h Don't cast user-supplied pointers to DBusBasicValue * 2018-12-11 12:23:06 +00:00
dbus-marshal-validate.c validate_body_helper: Bounds-check before validating booleans 2018-08-02 19:20:32 +01:00
dbus-marshal-validate.h dbus-marshal-validate.h: Make self-contained 2018-12-17 14:12:59 +00:00
dbus-memory.c embedded tests: Conform to the same API for all tests 2018-12-17 14:12:59 +00:00
dbus-memory.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-mempool.c embedded tests: Conform to the same API for all tests 2018-12-17 14:12:59 +00:00
dbus-mempool.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-message-internal.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-message-private.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-message-util.c test: Move dbus-message-factory and most of dbus-message-util into test/ 2019-01-21 15:20:39 +00:00
dbus-message.c Don't cast user-supplied pointers to DBusBasicValue * 2018-12-11 12:23:06 +00:00
dbus-message.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-misc.c test: Move _dbus_misc_test() here 2019-01-21 15:22:06 +00:00
dbus-misc.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-nonce.c nonce: Don't try to rmdir(NULL) on OOM 2018-08-02 17:15:29 +01:00
dbus-nonce.h DBusNonceFile: Don't rely on caller preallocating the object 2017-11-07 12:43:52 +00:00
dbus-object-tree.c embedded tests: Conform to the same API for all tests 2018-12-17 14:12:59 +00:00
dbus-object-tree.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-pending-call-internal.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-pending-call.c DBusPendingCall: Improve doc-comments around completed flag 2018-02-06 18:48:47 +00:00
dbus-pending-call.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-pipe-unix.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-pipe-win.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-pipe.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-pipe.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-pollable-set-epoll.c Rename structure DBusSocketSet to DBusPollableSet and adjust the corresponding functions/files 2019-01-09 15:20:19 +01:00
dbus-pollable-set-poll.c Rename structure DBusSocketSet to DBusPollableSet and adjust the corresponding functions/files 2019-01-09 15:20:19 +01:00
dbus-pollable-set.c Rename structure DBusSocketSet to DBusPollableSet and adjust the corresponding functions/files 2019-01-09 15:20:19 +01:00
dbus-pollable-set.h Rename structure DBusSocketSet to DBusPollableSet and adjust the corresponding functions/files 2019-01-09 15:20:19 +01:00
dbus-protocol.h DBusMessage: Add a header field for the container instance 2018-02-16 15:27:37 +00:00
dbus-resources.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-resources.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-server-debug-pipe.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-server-debug-pipe.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-server-launchd.c _dbus_server_new_for_launchd: Don't leak fd on failure 2017-11-24 12:17:29 +00:00
dbus-server-launchd.h Add launchd implementation. 2010-12-06 21:33:06 +01:00
dbus-server-protected.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-server-socket.c Add actual used ip family to --print-address output in case of listening on tcp 2018-03-19 22:24:09 +01:00
dbus-server-socket.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-server-unix.c server-unix: Don't leak address of systemd server on success 2018-08-23 18:23:34 +01:00
dbus-server-unix.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-server-win.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-server-win.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-server.c test: Move _dbus_server_test() here 2019-01-21 15:22:07 +00:00
dbus-server.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-sha.c Prefer to use _dbus_test_fatal() for assertion failures in tests 2017-11-15 12:12:15 +00:00
dbus-sha.h Bug 21161 - Update the FSF address 2009-07-14 15:39:47 -04:00
dbus-shared.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-shell.c Add and use _dbus_list_clear_full 2018-08-02 15:26:27 +01:00
dbus-shell.h Bug 21161 - Update the FSF address 2009-07-14 15:39:47 -04:00
dbus-signature.c test: Move _dbus_signature_test() here 2019-01-21 15:22:06 +00:00
dbus-signature.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-sockets-win.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-spawn-unix.c dbus-spawn: Don't take ownership of envp 2019-01-05 11:41:58 +01:00
dbus-spawn-win.c dbus-spawn-win.c: Simplify logic of return value from call to _dbus_spawn_program() 2019-01-05 11:41:58 +01:00
dbus-spawn.h dbus-spawn: Don't take ownership of envp 2019-01-05 11:41:58 +01:00
dbus-string-private.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-string-util.c test: Move string tests (most of dbus-string-util.c) here 2019-01-21 15:21:43 +00:00
dbus-string.c test: Move string tests (most of dbus-string-util.c) here 2019-01-21 15:21:43 +00:00
dbus-string.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-syntax.c Doc: fix incorrect param names, missing params, non-exist params 2013-08-22 20:01:08 +01:00
dbus-syntax.h Add dbus-syntax.[ch] 2012-02-24 12:43:55 +00:00
dbus-sysdeps-pthread.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-sysdeps-thread-win.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-sysdeps-unix.c _dbus_parse_uid: Remove unused function 2019-01-23 12:05:54 +00:00
dbus-sysdeps-unix.h _dbus_parse_uid: Remove unused function 2019-01-23 12:05:54 +00:00
dbus-sysdeps-util-unix.c bus: Try to raise soft fd limit to match hard limit 2019-04-18 11:54:48 +01:00
dbus-sysdeps-util-win.c bus: Try to raise soft fd limit to match hard limit 2019-04-18 11:54:48 +01:00
dbus-sysdeps-util.c test: Move sysdeps tests here 2019-01-21 15:22:05 +00:00
dbus-sysdeps-win.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-sysdeps-win.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-sysdeps-wince-glue.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-sysdeps-wince-glue.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-sysdeps.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-sysdeps.h bus: Try to raise soft fd limit to match hard limit 2019-04-18 11:54:48 +01:00
dbus-test-tap.c _dbus_test_diag: Flush stdout after each diagnostic 2017-11-15 13:18:22 +00:00
dbus-test-tap.h test-dbus: Produce machine-readable TAP output 2017-11-15 12:12:40 +00:00
dbus-test.h test: Move _dbus_list_test() here 2019-01-21 15:22:07 +00:00
dbus-threads-internal.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-threads.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-threads.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-timeout.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-timeout.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-transport-protected.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-transport-socket.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-transport-socket.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-transport-unix.c test: Move _dbus_transport_unix_test() here 2019-01-21 15:22:07 +00:00
dbus-transport-unix.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-transport-win.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-transport-win.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-transport.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-transport.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-types.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-userdb-util.c _dbus_user_database_get_groupname: Inline into its only caller 2019-01-23 12:09:27 +00:00
dbus-userdb.c dbus-userdb: Remove unused _dbus_homedir_from_username() 2019-01-23 11:57:42 +00:00
dbus-userdb.h _dbus_user_database_get_groupname: Inline into its only caller 2019-01-23 12:09:27 +00:00
dbus-uuidgen.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-uuidgen.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-valgrind-internal.h Fix building with newer Valgrind 2012-11-09 14:04:27 +00:00
dbus-watch.c trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus-watch.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
dbus.h trivial: Remove trailing whitespace from copyright notices 2018-12-17 11:22:39 +00:00
Makefile.am Configure option to disable traditional activation 2019-03-25 21:51:33 +02:00
Version.in Link dbus-daemon and dbus-daemon-lauch-helper against libdbus 2015-02-20 20:49:45 +00:00
versioninfo.rc.in Add version info to installed executables for cmake build system on Windows 2018-03-12 19:47:28 +01:00