units: explicitly require /var, /tmp and /var/tmp to be mounted before basic.target

[thirdparty/systemd.git] / TODO

Bugfixes:

* Should systemctl status \* work on all unit types, not just .service?

* Dangling symlinks of .automount unit files in .wants/ directories, set up
  automount points even when the original .automount file did not exist
  anymore. Only the .mount unit was still around.

* ExecStart with unicode characters fails in strv_split_quoted:

          [Service]
          Environment=ONE='one' "TWO='two two' too" THREE=
          ExecStart=/bin/python3 -c 'import sys;print(sys.argv)' $ONE $TWO $THREE

* MEMORY return code is overloaded for syntax errors in the command line.
  str_split_quoted() should return a real return code, so spawn_child can
  report the failure properly.

* When systemctl --host is used, underlying ssh connection can remain open.
  bus_close does not kill children?

External:

* Fedora: add an rpmlint check that verifies that all unit files in the RPM are listed in %systemd_post macros.

* Fedora: move kernel image to /usr/lib/modules/, kernel-install will take care of populating /boot

* Fedora: remove /etc/resolv.conf tmpfiles hack

* wiki: update journal format documentation for lz4 additions

* When lz4 gets an API for lz4 command output, make use of it to
  compress coredumps in a way compatible with /usr/bin/lz4.

Before 220:

* rework fsckd/fsck's connection logic or remove fsck entirely

* fix userns support in nspawn, or remove it entirely

* make unmount-on-eject work again

* bus-proxy: GetConnectionSELinuxSecurityContext() is completely broken

Features:

* .timer units should optionally support CLOCK_BOOTTIME in addition to CLOCK_MONOTONIC

* rm_rf() should be able to remove subvolumes

* systemd-run should support a mode where we wait for the unit to be started up

* create a btrfs qgroup for /var/lib/machines, and add all container
  subvolumes we create to it.

* nspawn: add --overlay= to support overlay file systems, similar to
  --tmpfs= and --bind=.

* When logging about multiple units (stopping BoundTo units, conflicts, etc.),
  log both units as UNIT=, so that journalctl -u triggers on both.

* to allow "linking" of nspawn containers, extend --network-bridge= so
  that it can dynamically create bridge interfaces that are refcounted
  by the containers on them. For each group of containers to link together

* journalctl --verify: don't show files that are currently being
  written to as FAIL, but instead show that their are being written
  to.

* assign MESSAGE_ID to log messages about failed services

* coredump: make the handler check /proc/$PID/rlimits for RLIMIT_CORE,
  and supress coredump if turned off. Then change RLIMIT_CORE to
  infinity by default for all services. This then allows per-service
  control of coredumping.

* generate better errors when people try to set transient properties
  that are not supported...
  http://lists.freedesktop.org/archives/systemd-devel/2015-February/028076.html

* PID 1: when invoking systemctl preset-all on first boots, operate in
  an exclusively additive way, i.e. never remove any pre-existing
  symlinks, only add new ones.

* Introduce $LISTEN_NAMES to complement $LISTEN_FDS, containing a
  colon separated list of identifiers for the fds passed.

* when the fstab-generator runs in the initrd, it should create a /dev/null mask for systemd-fsck-root.service, to avoid that the the root fs is fsck'ed twice.

* maybe introduce WantsMountsFor=? Usecase:
  http://lists.freedesktop.org/archives/systemd-devel/2015-January/027729.html

* rework kexec logic to use new kexec_file_load() syscall, so that we
  don't have to call kexec tool anymore.

* The udev blkid built-in should expose a property that reflects
  whether media was sensed in USB CF/SD card readers. This should then
  be used to control SYSTEMD_READY=1/0 so that USB card readers aren't
  picked up by systemd unless they contain a medium. This would mirror
  the behaviour we already have for CD drives.

* nspawn: emulate /dev/kmsg using CUSE and turn off the syslog syscall
  with seccomp. That should provide us with a useful log buffer that
  systemd can log to during early boot, and disconnect container logs
  from the kernel's logs.

* networkd/udev: implement SR_IOV configuration in .link files:
  http://lists.freedesktop.org/archives/systemd-devel/2015-January/027451.html

* When RLIMIT_NPROC is set from a unit file it currently always is set
  for root, not for the user set in User=, which makes it
  useless. After fixing this, set RLIMIT_NPROC for
  systemd-journal-xyz, and all other of our services that run under
  their own user ids, and use User= (but only in a world where userns
  is ubiquitous since otherwise we cannot invoke those daemons on the
  host AND in a container anymore). Also, if LimitNPROC= is used
  without User= we should warn and refuse operation.

* logind: maybe allow configuration of the StopTimeout for session scopes

* Set NoNewPriviliges= on all of our own services, where that makes sense

* Rework systemctl's GetAll property parsing to use the generic bus_map_all_properties() API

* rework journald sigbus stuff to use mutex

* import-dkr: support tarsum checksum verification, if it becomes reality one day...

* import-dkr: convert json bits to nspawn configuration

* core/cgroup: support net_cls modules, and support automatically allocating class ids, then add support for making firewall changes depending on it, to implement a per-service firewall

* introduce systemd-nspawn-ephemeral@.service, and hook it into "machinectl start" with a new --ephemeral switch

* "machinectl status" should also show internal logs of the container in question

* "machinectl list-images" should show os-release data, as well as machine-info data (including deployment level)

* nspawn: when start a container "foobar" look for its configuration in a file "foobar.nspawn" in /etc/systemd/nspawn/ as well as next to the actualy directory or image to boot

* Port various tools to make use of verbs.[ch], where applicable

* "machinectl history"

* "machinectl diff"

* "machinectl commit" that takes a writable snapshot of a tree, invokes a shell in it, and marks it read-only after use

* systemd-nspawn -x should support ephemeral instances of gpt images

* hostnamectl: show root image uuid

* sysfs set api in libudev is not const

* Find a solution for SMACK capabilities stuff:
  http://lists.freedesktop.org/archives/systemd-devel/2014-December/026188.html

* port libmount hookup to use API's own inotify interface, as soon as that is table in libmount

* "systemctl preset-all" should probably order the unit files it
  operates on lexicographically before starting to work, in order to
  ensure deterministic behaviour if two unit files conflict (like DMs
  do, for example)

* resolved should optionally register additional per-interface LLMNR
  names, so that for the container case we can establish the same name
  (maybe "host") for referencing the server, everywhere.

* systemd-journal-upload (or a new, related tool): allow pushing out
  journal messages onto the network in BSD syslog protocol,
  continuously. Default to some link-local IP mcast group, to make this
  useful as a one-stop debugging tool.

* synchronize console access with BSD locks:
  http://lists.freedesktop.org/archives/systemd-devel/2014-October/024582.html

* as soon as we have kdbus, and sender timestamps, revisit coalescing multiple parallel daemon reloads:
  http://lists.freedesktop.org/archives/systemd-devel/2014-December/025862.html

* the install state probably shouldn't get confused by generated units, think dbus1/kdbus compat!

* in systemctl list-unit-files: show the install value the presets would suggest for a service in a third column

* figure out when we can use the coarse timers

* sd-resolve: drop res_query wrapping, people should call via the bus to resolved instead

* add "systemctl start -v foobar.service" that shows logs of a service
  while the start command runs. This is non-trivial to do without
  races though, since we should flush out all journal messages before
  returning from the "systemctl stop".

* firstboot: make it useful to be run immediately after yum --installroot to set up a machine. (most specifically, make --copy-root-password work even if /etc/passwd already exists

* timesyncd + resolved: add ugly bus calls to set NTP and DNS servers per-interface, for usage by NM

* add infrastructure to allocate dynamic/transient users and UID ranges, for use in user-namespaced containers, per-seat gdm login screens and gdm guest sessions

* machined: add an API so that libvirt-lxc can inform us about network interfaces being removed or added to an existing machine

* maybe add support for specifier expansion in user.conf, specifically DefaultEnvironment=

* code cleanup: retire FOREACH_WORD_QUOTED, port to unquote_first_word() loops instead

* introduce systemd-timesync-wait.service or so to sync on an NTP fix?

* systemd --user should issue sd_notify() upon reaching basic.target, not on becoming idle

* consider showing the unit names during boot up in the status output, not just the unit descriptions

* dhcp: do we allow configuring dhcp routes on interfaces that are not the one we got the dhcp info from?

* maybe allow timer units with an empty Units= setting, so that they
  can be used for resuming the system but nothing else.

* what to do about udev db binary stability for apps? (raw access is not an option)

* maybe provide an API to allow migration of foreign PIDs into existing scopes.

* maybe support a new very "soft" reboot mode, that simply kills all processes, disassembles everything, flushes /run and sysvipc, and then reexecs systemd again

* man: document that corrupted journal files is nothing to act on

* man: maybe use the word "inspect" rather than "introspect"?

* "machinectl list" should probably show columns for OS version and IP addresses

* systemctl: if some operation fails, show log output?

* systemctl edit:
- allow creation of units from scratch
- use equvalent of cat() to insert existing config as a comment, prepended with #.
  Upon editor exit, lines with one # are removed, lines with two # are left with one #, etc.

* refcounting in sd-resolve is borked

* exponential backoff in timesyncd and resolved when we cannot reach a server

* unquote_many_words() should probably be used by a lot of code that
  currently uses FOREACH_WORD and friends. For example, most conf
  parsing callbacks should use it.

* merge ~/.local/share and ~/.local/lib into one similar /usr/lib and /usr/share....

* systemd.show_status= should probably have a mode where only failed
  units are shown.

* add systemd.abort_on_kill or some other such flag to send SIGABRT instead of SIGKILL
  (throughout the codebase, not only PID1)

* networkd:
  - add LLDP client side support
  - the DHCP lease data (such as NTP/DNS) is still made available when
    a carrier is lost on a link. It should be removed instantly.
  - .network setting that allows overriding of the hostname to send to the dhcp server
    http://lists.freedesktop.org/archives/systemd-devel/2014-July/021550.html
  - expose in the API the following bits:
        - option 15, domain name and/or option 119, search list
        - option 12, host name and/or option 81, fqdn
        - option 100, 101, timezone
        - option 123, 144, geolocation
        - option 252, configure http proxy (PAC/wpad)
  - networkd's dhcp server should transparently pass on the DNS and
    NTP server list it got from user configuration and its dhcp client
    to clients. It should also pass on its own timezone information.
  - provide a way to define a per-network interface default metric value
    for all routes to it. possibly a second default for DHCP routes.
  - allow Name= to be specified repeatedly in the [Match] section. Maybe also
    support Name=foo*|bar*|baz ?
  - duplicate address check for static IPs (like ARPCHECK in network-scripts)

* resolved:
  - put networkd events and rtnl events at a higher priority, so that
    we always process them before we process client requests
  - DNSSEC
        - use base64 for key presentation?
        - add display of private key types (http://tools.ietf.org/html/rfc4034#appendix-A.1.1)?
        - add nice formatting of DNS timestamps
  - DNS
        - search paths
  - mDNS/DNS-SD
        - avahi compat
  - DNS-SD service registration from socket units
  - edns0
  - dname
  - cname on PTR (?)
  - maybe randomize DNS UDP source ports
  - maybe compare query section of DNS replies

* Allow multiple ExecStart= for all Type= settings, so that we can cover rescue.service nicely

* Add a new verb "systemctl top"

* add new gpt type for btrfs volumes

* support empty /etc boots nicely:
  - nspawn/gpt-generator: introduce new gpt partition type for /usr
  - fstab-generator: support systemd.volatile=yes|no|state on the kernel cmdline, too, similar to nspawn's --volatile=

* generator that automatically discovers btrfs subvolumes, identifies their purpose based on some xattr on them.

* timer units: actually add extra delays to timer units with high AccuracySec values, don't start them already when we are awake...

* a way for container managers to turn off getty starting via $container_headless= or so...

* figure out a nice way how we can let the admin know what child/sibling unit causes cgroup membership for a specific unit

* mount_cgroup_controllers(): symlinks need to get the label applied

* For timer units: add some mechanisms so that timer units that trigger immediately on boot do not have the services
  they run added to the initial transaction and thus confuse Type=idle.

* Run most system services with cgroupfs read-only and procfs with a more secure mode (doesn't work, since the hidepid= option is per-pid-namespace, not per-mount)

* sd-event: generate a failure of a default event loop is executed out-of-thread

* add bus api to query unit file's X fields.

* consider adding RuntimeDirectoryUser= + RuntimeDirectoryGroup=

* sd-event: define more intervals where we will shift wakeup intervals around in, 1h, 6h, 24h, ...

* gpt-auto-generator:
  - Support LUKS for root devices
  - Define new partition type for encrypted swap? Support probed LUKS for encrypted swap?
  - Make /home automount rather than mount?

* add generator that pulls in systemd-network from containers when
  CAP_NET_ADMIN is set, more than the loopback device is defined, even
  when it is otherwise off

* MessageQueueMessageSize= and RLimitFSIZE= (and suchlike) should use parse_iec_size().

* "busctl status" works only as root on dbus1, since we cannot read
  /proc/$PID/exe

* implement Distribute= in socket units to allow running multiple
  service instances processing the listening socket, and open this up
  for ReusePort=

* socket units: support creating sockets in different namespace,
  opening it up for JoinsNamespaceOf=. This would require to fork off
  a tiny process that joins the namespace and creates/binds the socket
  and passes this back to PID1 via SCM_RIGHTS. This also could be used
  to allow Chown/chgrp on sockets without requiring NSS in PID 1.

* New service property: maximum CPU and wallclock runtime for a service

* introduce bus call FreezeUnit(s, b), as well as "systemctl freeze
  $UNIT" and "systemctl thaw $UNIT" as wrappers around this. The calls
  should SIGSTOP all unit processes in a loop until all processes of
  it are fully stopped. This can later be used for app management by
  desktop UIs such as gnome-shell to freeze apps that are not visible
  on screen, not unlike how job control works on the shell

* cgroups:
  - implement per-slice CPUFairScheduling=1 switch
  - handle jointly mounted controllers correctly
  - introduce high-level settings for RT budget, swappiness
  - how to reset dynamically changed unit cgroup attributes sanely?
  - when reloading configuration, apply new cgroup configuration
  - when recursively showing the cgroup hierarchy, optionally also show
    the hierarchies of child processes

* transient units:
  - add field to transient units that indicate whether systemd or somebody else saves/restores its settings, for integration with libvirt
  - ensure scope units may be started only a single time

* Automatically configure swap partition to use for hibernation by looking for largest swap partition on the root disk?

* when we detect low battery and no AC on boot, show pretty splash and refuse boot

* machined, localed: when we try to kill an empty cgroup, generate an ESRCH error over the bus

* libsystemd-journal, libsystemd-login, libudev: add calls to easily attach these objects to sd-event event loops

* be more careful what we export on the bus as (usec_t) 0 and (usec_t) -1

* unify dispatch table in systemctl_main() and friends

* rfkill,backlight: we probably should run the load tools inside of the udev rules so that the state is properly initialized by the time other software sees it

* After coming back from hibernation reset hibernation swap partition using the /dev/snapshot ioctl APIs

* If we try to find a unit via a dangling symlink, generate a clean
  error. Currently, we just ignore it and read the unit from the search
  path anyway.

* refuse boot if /etc/os-release is missing or /etc/machine-id cannot be set up

* btrfs raid assembly: some .device jobs stay stuck in the queue

* make sure gdm does not use multi-user-x but the new default X configuration file, and then remove multi-user-x from systemd

* man: the documentation of Restart= currently is very misleading and suggests the tools from ExecStartPre= might get restarted.

* load .d/*.conf dropins for device units

* allow implementation of InaccessibleDirectories=/ plus
  ReadOnlyDirectories=... for whitelisting files for a service.

* sd-bus:
  - GetAllProperties() on a non-existing object does not result in a failure currently
  - kdbus: process fd=-1 for incoming msgs
  - port to sd-resolve for connecting to TCP dbus servers
  - kdbus: maybe add controlling tty metadata fields
  - see if we can introduce a new sd_bus_get_owner_machine_id() call to retrieve the machine ID of the machine of the bus itself
  - when kdbus does not take our message without memfds, try again with memfds
  - see if we can drop more message validation on the sending side
  - add API to clone sd_bus_message objects
  - make AddMatch calls on dbus1 transports async?
  - kdbus: matches against source or destination pids for an "strace -p"-like feel. Problem: The PID info needs to be available in userspace too...
  - longer term: priority inheritance
  - dbus spec updates:
       - kdbus mapping
       - NameLost/NameAcquired obsolete
       - GVariant
       - path escaping
  - update systemd.special(7) to mention that dbus.socket is only about the compatibility socket now
  - test bloom filter generation indexes
  - bus-proxy: when passing messages from kdbus, make sure we properly
    handle the case where a large number of fds is appended that we
    cannot pass into sendmsg() of the AF_UNIX sokcet (which only accepts
    253 messages)
  - kdbus: introduce a concept of "send-only" connections
  - kdbus: add counter for refused unicast messages that is passed out via the RECV ioctl. SImilar to the counter for dropped multicast messages we already have.

* sd-event
  - allow multiple signal handlers per signal?
  - document chaining of signal handler for SIGCHLD and child handlers

* in the final killing spree, detect processes from the root directory, and
  complain loudly if they have argv[0][0] == '@' set.
  https://bugzilla.redhat.com/show_bug.cgi?id=961044

* investigate endianness issues of UUID vs. GUID

* dbus: when a unit failed to load (i.e. is in UNIT_ERROR state), we
  should be able to safely try another attempt when the bus call LoadUnit() is invoked.

* add a pam module that passes the hdd passphrase into the PAM stack and then expires it, for usage by gdm auto-login.

* add a pam module that on password changes updates any LUKS slot where the password matches

* maybe add a generator that looks for "systemd.run=" on the kernel cmdline for container usercases...

* cgtop: make cgtop useful in a container

* test/:
  - add 'set -e' to scripts in test/
  - make stuff in test/ work with separate output dir

* seems that when we follow symlinks to units we prefer the symlink
  destination path over /etc and /usr. We should not do that. Instead
  /etc should always override /run+/usr and also any symlink
  destination.

* when isolating, try to figure out a way how we implicitly can order
  all units we stop before the isolating unit...

* teach ConditionKernelCommandLine= globs or regexes (in order to match foobar={no,0,off})

* BootLoaderSpec: Clarify that the kernel has to be in $BOOT. Clarify
  that the boot loader should be installed to the ESP. Define a way
  how an installer can figure out whether a BLS compliant boot loader
  is installed.

* think about requeuing jobs when daemon-reload is issued? usecase:
  the initrd issues a reload after fstab from the host is accessible
  and we might want to requeue the mounts local-fs acquired through
  that automatically.

* systemd-inhibit: make taking delay locks useful: support sending SIGINT or SIGTERM on PrepareForSleep()

* journal-or-kmsg is currently broken? See reverted commit 4a01181e460686d8b4a543b1dfa7f77c9e3c5ab8.

* remove any syslog support from log.c -- we probably cannot do this before split-off udev is gone for good

* shutdown logging: store to EFI var, and store to USB stick?

* write UI tool that pops up emergency messages from the journal as notification

* think about window-manager-run-as-user-service problem: exit 0 → activate shutdown.target; exit != 0 → restart service

* merge unit_kill_common() and unit_kill_context()

* introduce ExecCondition= in services

* EFI:
  - honor language efi variables for default language selection (if there are any?)
  - honor timezone efi variables for default timezone selection (if there are any?)
  - change bootctl to be backed by systemd-bootd to control temporary and persistent default boot goal plus efi variables

* maybe do not install getty@tty1.service symlink in /etc but in /usr?

* re-enable "make check" for gtk-doc (broken for unknown reason)

* fstab: add new mount option x-systemd-after=/foobar/waldo to allow manual dependencies to other mount points
  https://bugzilla.redhat.com/show_bug.cgi?id=812826

* print a nicer explanation if people use variable/specifier expansion in ExecStart= for the first word

* mount: turn dependency information from /proc/self/mountinfo into dependency information between systemd units.

* logind:
  - logind: optionally, ignore idle-hint logic for autosuspend, block suspend as long as a session is around
  - When we update the kernel all kind of hibernation should be prohibited until shutdown/reboot
  - logind: wakelock/opportunistic suspend support
  - Add pretty name for seats in logind
  - logind: allow showing logout dialog from system?
  - we should probably handle SIGTERM/SIGINT to not leave dot files around, just in case
  - session scopes/user unit: add RequiresMountsFor for the home directory of the user
  - add Suspend() bus calls which take timestamps to fix double suspend issues when somebody hits suspend and closes laptop quickly.
  - if pam_systemd is invoked by su from a process that is outside of a
    any session we should probably just become a NOP, since that's
    usually not a real user session but just some system code that just
    needs setuid().
  - logind: make the Suspend()/Hibernate() bus calls wait for the for
    the job to be completed. before returning, so that clients can wait
    for "systemctl suspend" to finish to know when the suspending is
    complete.
  - logind: when the power button is pressed short, just popup a
    logout dialog. If it is pressed for 1s, do the usual
    shutdown. Inspiration are Macs here.
  - expose "Locked" property on logind sesison objects
  - given that logind now lets PID 1 do all nasty work, we can
    probably reduce the capability set it retains substantially.
    (we need CAP_SYS_ADMIN for drmSetMaster(), so maybe not worth it)
  - expose orientation sensors and tablet mode through logind

* exec: when deinitializating a tty device fix the perms and group, too, not only when initializing. Set access mode/gid to 0620/tty.

* service: watchdog logic: for testing purposes allow ping, but do not require pong

* journal:
  - consider introducing implicit _TTY= + _PPID= + _EUID= + _EGID= + _FSUID= + _FSGID= fields
  - import and delete pstore filesystem content at startup
  - journald: also get thread ID from client, plus thread name
  - journal: when waiting for journal additions in the client always sleep at least 1s or so, in order to minimize wakeups
  - add API to close/reopen/get fd for journal client fd in libsystemd-journal.
  - fallback to /dev/log based logging in libsystemd-journal, if we cannot log natively?
  - declare the local journal protocol stable in the wiki interface chart
  - journal: reuse XZ context
  - sd-journal: speed up sd_journal_get_data() with transparent hash table in bg
  - journald: when dropping msgs due to ratelimit make sure to write
    "dropped %u messages" not only when we are about to print the next
    message that works, but alraedy after a short tiemout
  - check if we can make journalctl by default use --follow mode inside of less if called without args?
  - maybe add API to send pairs of iovecs via sd_journal_send
  - journal: when writing journal auto-rotate if time jumps backwards
  - journal: add a setgid "systemd-journal" utility to invoke from libsystemd-journal, which passes fds via STDOUT and does PK access
  - journactl: support negative filtering, i.e. FOOBAR!="waldo",
    and !FOOBAR for events without FOOBAR.
  - journal: store timestamp of journal_file_set_offline() int he header,
    so it is possible to display when the file was last synced.
  - journal-send.c, log.c: when the log socket is clogged, and we drop, count this and write a message about this when it gets unclogged again.
  - journal: find a way to allow dropping history early, based on priority, other rules
  - journal: When used on NFS, check payload hashes
  - journald: add kernel cmdline option to disable ratelimiting for debug purposes
  - refuse taking lower-case variable names in sd_journal_send() and friends.
  - journald: we currently rotate only after MaxUse+MaxFilesize has been reached.
  - journal: deal nicely with byte-by-byte copied files, especially regards header
  - journal: sanely deal with entries which are larger than the individual file size, but where the components would fit
  - Replace utmp, wtmp, btmp, and lastlog completely with journal
  - journalctl: instead --after-cursor= maybe have a --cursor=XYZ+1 syntax?
  - when a kernel driver logs in a tight loop, we should ratelimit that too.
  - journald: optionally, log debug messages to /run but everything else to /var
  - journald: when we drop syslog messages because the syslog socket is
    full, make sure to write how many messages are lost as first thing
    to syslog when it works again.
  - journald: make sure ratelimit is actually really per-service with the new cgroup changes
  - change systemd-journal-flush into a service that stays around during
    boot, and causes the journal to be moved back to /run on shutdown,
    so that we do not keep /var busy. This needs to happen synchronously,
    hence doing this via signals is not going to work.
  - optionally support running journald from the command line for testing purposes in external projects
  - journald: allow per-priority and per-service retention times when rotating/vacuuming
  - journald: make use of uid-range.h to managed uid ranges to split
    journals in.
  - journalctl: add the ability to look for the most recent process of a binary. journalctl /usr/bin/X11 --pid=-1 or so...
  - improve journalctl performance by loading journal files
    lazily. Encode just enough information in the file name, so that we
    do not have to open it to know that it is not interesting for us, for
    the most common operations.

* document:
  - document that deps in [Unit] sections ignore Alias= fields in
    [Install] units of other units, unless those units are disabled
  - man: clarify that time-sync.target is not only sysv compat but also useful otherwise. Same for similar targets
  - document the exit codes when services fail before they are exec()ed
  - document that service reload may be implemented as service reexec
  - document in wiki how to map ical recurrence events to systemd timer unit calendar specifications
  - add a man page containing packaging guidelines and recommending usage of things like Documentation=, PrivateTmp=, PrivateNetwork= and ReadOnlyDirectories=/etc /usr.
  - document systemd-journal-flush.service properly
  - documentation: recommend to connect the timer units of a service to the service via Also= in [Install]
  - man: document the very specific env the shutdown drop-in tools live in
  - man: extend runlevel(8) to mention that runlevels suck, and are dead. Maybe add runlevel(7) with a note about that too
  - man: add more examples to man pages
  - man: maybe sort directives in man pages, and take sections from --help and apply them to man too

* systemctl:
  - systemctl list-jobs - show dependencies
  - add systemctl switch to dump transaction without executing it
  - Add a verbose mode to "systemctl start" and friends that explains what is being done or not done
  - "systemctl disable" on a static unit prints no message and does
    nothing. "systemctl enable" does nothing, and gives a bad message
    about it. Should fix both to print nice actionable messages.
  - print nice message from systemctl --failed if there are no entries shown, and hook that into ExecStartPre of rescue.service/emergency.service
  - add new command to systemctl: "systemctl system-reexec" which reexecs as many daemons as virtually possible
  - systemctl enable: fail if target to alias into does not exist? maybe show how many units are enabled afterwards?
  - systemctl: "Journal has been rotated since unit was started." message is misleading
  - support "systemctl stop foobar@.service" to stop all units matching a certain template
  - Something is wrong with symlink handling of "autovt@.service" in "systemctl list-unit-files"
  - better error message if you run systemctl without systemd running
  - systemctl status output should should include list of triggering units and their status

* unit install:
  - "systemctl mask" should find all names by which a unit is accessible
    (i.e. by scanning for symlinks to it) and link them all to /dev/null
  - systemctl list-unit-files should list generated files (and probably with a new state "generated" for them, or so)

* timer units:
  - timer units should get the ability to trigger when:
    o CLOCK_REALTIME makes jumps (TFD_TIMER_CANCEL_ON_SET)
    o DST changes
  - Support 2012-02~4 as syntax for specifying the fourth to last day of the month.
  - calendarspec: support value ranges with ".." notation. Example: 2013-4..8-1
  - when parsing calendar timestamps support the UTC timezone (even if we will not support arbitrary timezone specs, support UTC itself certainly makes sense), also support syntaxes such as +0200
  - Modulate timer frequency based on battery state

* add libsystemd-password or so to query passwords during boot using the password agent logic

* If we show an error about a unit (such as not showing up) and it has no Description string, then show a description string generated form the reverse of unit_name_mangle().

* fedup: add --unit to systemctl switch-root somehow
* fedup: do not delete initrd on switch-root
* fedup: generator

* clean up date formatting and parsing so that all absolute/relative timestamps we format can also be parsed

* on shutdown: move utmp, wall, audit logic all into PID 1 (or logind?), get rid of systemd-update-utmp-runlevel

* make repeated alt-ctrl-del presses printing a dump, or even force a reboot without
  waiting for the timeout

* hostnamed: before returning information from /etc/machine-info.conf check the modification data and reread. Similar for localed, ...

* currently x-systemd.timeout is lost in the initrd, since crypttab is copied into dracut, but fstab is not

* nspawn:
  - refuses to boot containers without /etc/machine-id (OK?), and with empty /etc/machine-id (not OK).

* cryptsetup:
  - cryptsetup-generator: allow specification of passwords in crypttab itself
  - move cryptsetup key caching into kernel keyctl?
    https://bugs.freedesktop.org/show_bug.cgi?id=54982
  - support rd.luks.allow-discards= kernel cmdline params in cryptsetup generator

* hw watchdog: optionally try to use the preset watchdog timeout instead of always overriding it
  https://bugs.freedesktop.org/show_bug.cgi?id=54712

* after deserializing sockets in socket.c we should reapply sockopts and things

* make timer units go away after they elapsed

* move PID 1 segfaults to /var/lib/systemd/coredump?

* create /sbin/init symlinks from the build system

* allow writing multiple conditions in unit files on one line

* MountFlags=shared acts as MountFlags=slave right now.

* drop PID 1 reloading, only do reexecing (difficult: Reload()
  currently is properly synchronous, Reexec() is weird, because we
  cannot delay the response properly until we are back, so instead of
  being properly synchronous we just keep open the fd and close it
  when done. That means clients do not get a successful method reply,
  but much rather a disconnect on success.

* properly handle loop back mounts via fstab, especially regards to fsck/passno

* initialize the hostname from the fs label of /, if /etc/hostname does not exist?

* rename "userspace" to "core-os"

* load-fragment: when loading a unit file via a chain of symlinks
  verify that it is not masked via any of the names traversed.

* introduce Type=pid-file

* change Requires=basic.target to RequisiteOverride=basic.target

* when breaking cycles drop sysv services first, then services from /run, then from /etc, then from /usr

* automount: implement expire:
   - set superblock timeout AUTOFS_DEV_IOCTL_TIMEOUT_CMD
   - periodically run AUTOFS_DEV_IOCTL_EXPIRE_CMD
     - every timeout/4 (original autofs logic)
     - blocking, needs a thread
     - run until -EAGAIN
   - receive expire packet on pipe if kernel tells the timeout is over
     - call umount
     - answer expire packet on pipe with AUTOFS_DEV_IOCTL_{READY,FAIL}_CMD
   - AUTOFS_DEV_IOCTL_EXPIRE_CMD returns

* ExecOnFailure=/usr/bin/foo

* udev:
  - move to LGPL
  - kill scsi_id
  - add trigger --subsystem-match=usb/usb_device device
  - reimport udev db after MOVE events for devices without dev_t

* when a service has the same env var set twice we actually store it twice and return that in systemctl show -p... We should only show the last setting

* introduce mix of BindTo and Requisite

* There's currently no way to cancel fsck (used to be possible via C-c or c on the console)

* add option to sockets to avoid activation. Instead just drop packets/connections, see http://cyberelk.net/tim/2012/02/15/portreserve-systemd-solution/

* default unix qlen is too small (10). bump sysctl? add sockopt?

* save coredump in Windows/Mozilla minidump format

* support crash reporting operation modes (https://live.gnome.org/GnomeOS/Design/Whiteboards/ProblemReporting)

* default to actual 32-bit PIDs, via /proc/sys/kernel/pid_max

* be able to specify a forced restart of service A where service B depends on, in case B
  needs to be auto-respawned?

* when a bus name of a service disappears from the bus make sure to queue further activation requests

* tmpfiles:
  - apply "x" on "D" too (see patch from William Douglas)
  - replace F with f+.
  - instead of ignoring unknown fields, reject them.

* for services: do not set $HOME in services unless requested

* hide PAM options in fragment parser when compile time disabled

* when we automatically restart a service, ensure we restart its rdeps, too.

* allow Type=simple with PIDFile=
  https://bugzilla.redhat.com/show_bug.cgi?id=723942

* move PAM code into its own binary

* implement Register= switch in .socket units to enable registration
  in Avahi, RPC and other socket registration services.

* make sure systemd-ask-password-wall does not shutdown systemd-ask-password-console too early

* add ReloadSignal= for configuring a reload signal to use

* verify that the AF_UNIX sockets of a service in the fs still exist
  when we start a service in order to avoid confusion when a user
  assumes starting a service is enough to make it accessible

* Make it possible to set the keymap independently from the font on
  the kernel cmdline. Right now setting one resets also the other.

* and a dbus call to generate target from current state

* GC unreferenced jobs (such as .device jobs)

* write blog stories about:
  - hwdb: what belongs into it, lsusb
  - enabling dbus services
  - status update
  - how to make changes to sysctl and sysfs attributes
  - remote access
  - how to pass throw-away units to systemd, or dynamically change properties of existing units
  - testing with Harald's awesome test kit
  - auto-restart
  - how to develop against journal browsing APIs
  - the journal HTTP iface
  - non-cgroup resource management
  - dynamic resource management with cgroups
  - refreshed, longer missions statement
  - calendar time events
  - init=/bin/sh vs. "emergency" mode, vs. "rescue" mode, vs. "multi-user" mode, vs. "graphical" mode, and the debug shell
  - how to create your own target
  - instantiated apache, dovecot and so on
  - hooking a script into various stages of shutdown/rearly booot

* allow port=0 in .socket units

* recreate systemd's D-Bus private socket file on SIGUSR2

* Support --test based on current system state

* investigate whether the gnome pty helper should be moved into systemd, to provide cgroup support.

* maybe introduce ExecRestartPre=

* dot output for --test showing the 'initial transaction'

* fingerprint.target, wireless.target, gps.target, netdevice.target

* systemd-python:
   - figure out a simple way to wait for journal events in a way that
     works with ^C
   - add documentation to systemd.daemon

* bootchart:
   - plot per-process IO utilization
   - group processes based on service association (cgroups)
   - document initcall_debug
   - kernel cmdline "bootchart" option for simplicity?

* udev-link-config:
   - Make sure ID_PATH is always exported and complete for
     network devices where possible, so we can safely rely
     on Path= matching
   - check MTUBytes parsing (expecting size_t but we are using unsigned)

* sd-rtnl:
   - add support for more attribute types
   - inbuilt piping support (essentially degenerate async)? see loopback-setup.c and other places

* networkd:
   - add more keys to [Route] and [Address] sections
   - add support for more DHCPv4 options (and, longer term, other kinds of dynamic config)
   - add proper initrd support (in particular generate .network/.link files based on /proc/cmdline)
   - add reduced [Link] support to .network files
   - add Scope= parsing option for [Network]
   - properly handle routerless dhcp leases
   - add more attribute support for SIT tunnel
   - work with non-ethernet devices
   - add support for more bond options

* networkd-wait-online:
   - make operstates to wait for configurable?

* dhcp:
   - figure out how much we can increase Maximum Message Size
   - export timezone information
   - support RFC4702 (pass FQDN)

* dhcp6:
   - add functions to set previously stored IPv6 addresses on startup and get
     them at shutdown; store them in client->ia_na
   - write more test cases
   - implement reconfigure support, see 5.3., 15.11. and 22.20.
   - implement support for temporary adressess (IA_TA)
   - implement dhcpv6 authentication
   - investigate the usefulness of Confirm messages; i.e. are there any
     situations where the link changes without any loss in carrier detection
     or interface down
   - some servers don't do rapid commit without a filled in IA_NA, verify
     this behavior

External:

* dbus:
   - natively watch for dbus-*.service symlinks (PENDING)
   - teach dbus to activate all services it finds in /etc/systemd/services/org-*.service

* fix alsa mixer restore to not print error when no config is stored

* make cryptsetup lower --iter-time

* patch kernel for xattr support in /dev, /proc/, /sys?

* kernel: add device_type = "fb", "fbcon" to class "graphics"

* drop accountsservice's StandardOutput=syslog and Type=dbus fields

* dbus upstream still refers to dbus.target and should not

* dbus: in fedora, make /var/lib/dbus/machine-id a symlink to /etc/machine-id

* add "# export SYSTEMD_PAGER=" to bash login

* /usr/bin/service should actually show the new command line

* fedora: suggest auto-restart on failure, but not on success and not on coredump. also, ask people to think about changing the start limit logic. Also point people to RestartPreventExitStatus=, SuccessExitStatus=

* fedora: F20: go timer units all the way, leave cron.daily for cron

* neither pkexec nor sudo initialize environ[] from the PAM environment?

* fedora: update policy to declare access mode and ownership of unit files to root:root 0644, and add an rpmlint check for it

* register catalog database signature as file magic

* zsh shell completion:
  - <command> <verb> -<TAB> should complete options, but currently does not
  - systemctl add-wants,add-requires


Regularly:

* look for close() vs. close_nointr() vs. close_nointr_nofail()

* check for strerror(r) instead of strerror(-r)

* Use PR_SET_PROCTITLE_AREA if it becomes available in the kernel

* pahole

* set_put(), hashmap_put() return values check. i.e. == 0 does not free()!

* use secure_getenv() instead of getenv() where appropriate

* link up selected blog stories from man pages and unit files Documentation= fields

Scheduled for removal or fixing:

* xxxOverridable dependencies (probably: fix)