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2014-07-18terminal: add systemd-subterm exampleDavid Herrmann
The systemd-subterm example is a stacked terminal that shows how to use sd-term. Instead of rendering images and displaying it via X11/etc., it uses its parent terminal to display the page (terminal-emulator inside a terminal-emulator) (like GNU-screen and friends do). This is only for testing and not installed system-wide!
2014-07-18terminal: add parser state-machineDavid Herrmann
The term-parser is used to parse any input from TTY-clients. It reads CSI, DCS, OSC and ST control sequences and normal escape sequences. It doesn't do anything with the parsed data besides detecting the sequence and returning it. The caller has to react to them. The parser also comes with its own UTF-8 helpers. The reason for that is that we don't want to assert() or hard-fail on parsing errors. Instead, we treat any invalid UTF-8 sequences as ISO-8859-1. This allows pasting invalid data into a terminal (which cannot be controlled through the TTY, anyway) and we still deal with it in a proper manner. This is _required_ for 8-bit and 7-bit DEC modes (including the g0-g3 mappings), so it's not just an ugly fallback because we can (it's still horribly ugly but at least we have an excuse).
2014-07-17ui/term: add line/cell/char handling for terminal pagesDavid Herrmann
This commit introduces libsystemd-ui, a systemd-internal helper library that will contain all the UI related functionality. It is going to be used by systemd-welcomed, systemd-consoled, systemd-greeter and systemd-er. Further use-cases may follow. For now, this commit only adds terminal-page handling based on lines only. Follow-up commits will add more functionality.
2014-07-17shared: add PTY helperDavid Herrmann
This Pty API wraps the ugliness that is POSIX PTY. It takes care of: - edge-triggered HUP handling (avoid heavy CPU-usage on vhangup) - HUP vs. input-queue draining (handle HUP _after_ draining the whole input queue) - SIGCHLD vs. HUP (HUP is no reliable way to catch PTY deaths, always use SIGCHLD. Otherwise, vhangup() and friends will break.) - Output queue buffering (async EPOLLOUT handling) - synchronous setup (via Barrier API) At the same time, the PTY API does not execve(). It simply fork()s and leaves everything else to the caller. Usually, they execve() but we support other setups, too. This will be needed by multiple UI binaries (systemd-console, systemd-er, ...) so it's placed in src/shared/. It's not strictly related to libsystemd-terminal, so it's not included there.
2014-07-17shared: add generic IPC barrierDavid Herrmann
The "Barrier" object is a simple inter-process barrier implementation. It allows placing synchronization points and waiting for the other side to reach it. Additionally, it has an abortion-mechanism as second-layer synchronization to send abortion-events asynchronously to the other side. The API is usually used to synchronize processes during fork(). However, it can be extended to pass state through execve() so you could synchronize beyond execve(). Usually, it's used like this (error-handling replaced by assert() for simplicity): Barrier b; r = barrier_init(&b); assert_se(r >= 0); pid = fork(); assert_se(pid >= 0); if (pid == 0) { barrier_set_role(&b, BARRIER_CHILD); ...do child post-setup... if (CHILD_SETUP_FAILED) exit(1); ...child setup done... barrier_place(&b); if (!barrier_sync(&b)) { /* parent setup failed */ exit(1); } barrier_destroy(&b); /* redundant as execve() and exit() imply this */ /* parent & child setup successful */ execve(...); } barrier_set_role(&b, BARRIER_PARENT); ...do parent post-setup... if (PARENT_SETUP_FAILED) { barrier_abort(&b); /* send abortion event */ barrier_wait_abortion(&b); /* wait for child to abort (exit() implies abortion) */ barrier_destroy(&b); ...bail out... } ...parent setup done... barrier_place(&b); if (!barrier_sync(&b)) { ...child setup failed... ; barrier_destroy(&b); ...bail out... } barrier_destroy(&b); ...child setup successfull... This is the most basic API. Using barrier_place() to place barriers and barrier_sync() to perform a full synchronization between both processes. barrier_abort() places an abortion barrier which superceeds any other barriers, exit() (or barrier_destroy()) places an abortion-barrier that queues behind existing barriers (thus *not* replacing existing barriers unlike barrier_abort()). This example uses hard-synchronization with wait_abortion(), sync() and friends. These are all optional. Barriers are highly dynamic and can be used for one-way synchronization or even no synchronization at all (postponing it for later). The sync() call performs a full two-way synchronization. The API is documented and should be fairly self-explanatory. A test-suite shows some special semantics regarding abortion, wait_next() and exit(). Internally, barriers use two eventfds and a pipe. The pipe is used to detect exit()s of the remote side as eventfds do not allow that. The eventfds are used to place barriers, one for each side. Barriers itself are numbered, but the numbers are reused once both sides reached the same barrier, thus you cannot address barriers by the index. Moreover, the numbering is implicit and we only store a counter. This makes the implementation itself very lightweight, which is probably negligible considering that we need 3 FDs for a barrier.. Last but not least: This barrier implementation is quite heavy. It's definitely not meant for fast IPC synchronization. However, it's very easy to use. And given the *HUGE* overhead of fork(), the barrier-overhead should be negligible.
2014-07-16test-tables: add new entriesZbigniew Jędrzejewski-Szmek
One missing string found. A few things had to be moved around to make it possible to test them.
2014-07-15journal-upload: a tool to push messages to systemd-journal-remoteZbigniew Jędrzejewski-Szmek
2014-07-16resolved: add a DNS client stub resolverLennart Poettering
Let's turn resolved into a something truly useful: a fully asynchronous DNS stub resolver that subscribes to network changes. (More to come: caching, LLMNR, mDNS/DNS-SD, DNSSEC, IDN, NSS module)
2014-07-11gitignore: ignore .swp filesDavid Herrmann
vim places them in the source-tree while editing files. Ignore them.
2014-07-08update .gitignoreRonny Chevalier
2014-07-07escape: beef up new systemd-escape toolLennart Poettering
Add various options for making it easy unescape, or mangle, or format as template instance or append a suffix.
2014-07-07firstboot: get rid of firstboot generator again, introduce ↵Lennart Poettering
ConditionFirstBoot= instead As Zbigniew pointed out a new ConditionFirstBoot= appears like the nicer way to hook in systemd-firstboot.service on first boots (those with /etc unpopulated), so let's do this, and get rid of the generator again.
2014-07-07firstboot: add new component to query basic system settings on first boot, ↵Lennart Poettering
or when creating OS images offline A new tool "systemd-firstboot" can be used either interactively on boot, where it will query basic locale, timezone, hostname, root password information and set it. Or it can be used non-interactively from the command line when prepareing disk images for booting. When used non-inertactively the tool can either copy settings from the host, or take settings on the command line. $ systemd-firstboot --root=/path/to/my/new/root --copy-locale --copy-root-password --hostname=waldi The tool will be automatically invoked (interactively) now on first boot if /etc is found unpopulated. This also creates the infrastructure for generators to be notified via an environment variable whether they are running on the first boot, or not.
2014-07-06compress: add benchmark-style testZbigniew Jędrzejewski-Szmek
This is useful to test the behaviour of the compressor for various buffer sizes. Time is limited to a minute per compression, since otherwise, when LZ4 takes more than a second which is necessary to reduce the noise, XZ takes more than 10 minutes. % build/test-compress-benchmark (without time limit) XZ: compressed & decompressed 2535300963 bytes in 794.57s (3.04MiB/s), mean compresion 99.95%, skipped 3570 bytes LZ4: compressed & decompressed 2535303543 bytes in 1.56s (1550.07MiB/s), mean compresion 99.60%, skipped 990 bytes % build/test-compress-benchmark (with time limit) XZ: compressed & decompressed 174321481 bytes in 60.02s (2.77MiB/s), mean compresion 99.76%, skipped 3570 bytes LZ4: compressed & decompressed 2535303543 bytes in 1.63s (1480.83MiB/s), mean compresion 99.60%, skipped 990 bytes It appears that there's a bug in lzma_end where it leaks 32 bytes.
2014-07-02path: add new "systemd-path" utility for querying paths described in ↵Lennart Poettering
file-hierarchy(7) This new tool is based on "sd-path", a new (so far unexported) API for libsystemd, that can hopefully grow into a workable API covering /opt and more one day.
2014-06-27coredump: add simple coredump vacuumingLennart Poettering
When disk space taken up by coredumps grows beyond a configured limit start removing the oldest coredump of the user with the most coredumps, until we get below the limit again.
2014-06-25tests: add test-compressRonny Chevalier
2014-06-24tests: add test-ratelimitRonny Chevalier
2014-06-22update .gitignoreRonny Chevalier
2014-06-20test: ensure conf_files_list returns absolute pathsMichael Marineau
2014-06-19gitignore: hide dhcp6/icmp6-rs testsLennart Poettering
2014-06-19gitignore: sort properlyLennart Poettering
2014-06-19debug-generator: add new generatorLennart Poettering
debug-generator can mask specific units if they are specified on the kernel command line with systemd.mask=. debug-generator can pull in debug-shell.service is systemd.debug-shell is passed on the kernel command line.
2014-06-19coredump: coredumpctl is so useful now, make it a first-class citizenLennart Poettering
Drop the "systemd-" prefix, renaming it from "systemd-coredumpctl" to "coredumpctl".
2014-06-16tests: add test-fdsetRonny Chevalier
2014-06-16tests: add test-socket-utilRonny Chevalier
2014-06-13sd-dhcp-server: add basic functionality for creating/destroying server instanceTom Gundersen
2014-06-13update-done: add minimal tool to manage system updates for /etc and /var, if ↵Lennart Poettering
/usr has changed In order to support offline updates to /usr, we need to be able to run certain tasks on next boot-up to bring /etc and /var in line with the updated /usr. Hence, let's devise a mechanism how we can detect whether /etc or /var are not up-to-date with /usr anymore: we keep "touch files" in /etc/.updated and /var/.updated that are mtime-compared with /usr. This means: Whenever the vendor OS tree in /usr is updated, and any services that shall be executed at next boot shall be triggered, it is sufficient to update the mtime of /usr itself. At next boot, if /etc/.updated and/or /var/.updated is older than than /usr (or missing), we know we have to run the update tools once. After that is completed we need to update the mtime of these files to the one of /usr, to keep track that we made the necessary updates, and won't repeat them on next reboot. A subsequent commit adds a new ConditionNeedsUpdate= condition that allows checking on boot whether /etc or /var are outdated and need updating. This is an early step to allow booting up with an empty /etc, with automatic rebuilding of the necessary cache files or user databases therein, as well as supporting later updates of /usr that then propagate to /etc and /var again.
2014-06-12sysusers: add minimal tool to reconstruct /etc/passwd and /etc/group from ↵Lennart Poettering
static files systemd-sysusers is a tool to reconstruct /etc/passwd and /etc/group from static definition files that take a lot of inspiration from tmpfiles snippets. These snippets should carry information about system users only. To make sure it is not misused for normal users these snippets only allow configuring UID and gecos field for each user, but do not allow configuration of the home directory or shell, which is necessary for real login users. The purpose of this tool is to enable state-less systems that can populate /etc with the minimal files necessary, solely from static data in /usr. systemd-sysuser is additive only, and will never override existing users. This tool will create these files directly, and not via some user database abtsraction layer. This is appropriate as this tool is supposed to run really early at boot, and is only useful for creating system users, and system users cannot be stored in remote databases anyway. The tool is also useful to be invoked from RPM scriptlets, instead of useradd. This allows moving from imperative user descriptions in RPM to declarative descriptions. The UID/GID for a user/group to be created can either be chosen dynamic, or fixed, or be read from the owner of a file in the file system, in order to support reconstructing the correct IDs for files that shall be owned by them. This also adds a minimal user definition file, that should be sufficient for most basic systems. Distributions are expected to patch these files and augment the contents, for example with fixed UIDs for the users where that's necessary.
2014-06-07Move handling of sysv initscripts to a generatorThomas Hindoe Paaboel Andersen
Reuses logic from service.c and the rc-local generator. Note that this drops reading of chkconfig entirely. It also drops reading runlevels from the LSB headers. The runlevels were only used to check for runlevels outside of the normal 1-5 range and then add special dependencies and settings. Special runlevels were dropped in the past so it seemed to be unused code. The generator does not know about non-generated units with a value set with SysVStartPriority=. These are therefor not taken into account when converting start priority to before/after.
2014-05-19resolved: add daemon to manage resolv.confTom Gundersen
Also remove the equivalent functionality from networkd.
2014-05-16networkd: add missing filesTom Gundersen
2014-05-13shared: add ring bufferDavid Herrmann
New "struct ring" object that implements a basic ring buffer for arbitrary byte-streams. A new basic runtime test is also added. This will be needed for our pty helpers for systemd-console and friends.
2014-04-28rename timedate-sntp to timesyncKay Sievers
2014-04-22remove bus-driverd, the interface is now handled natively by bus-proxydKay Sievers
2014-03-25gitignore updateKay Sievers
2014-03-14logind: automatically remove SysV + POSIX IPC objects when the users owning ↵Lennart Poettering
them fully log out
2014-03-14timedated: add SNTP client/query hookup (unused for now)Kay Sievers
2014-03-01Update gitignoreZbigniew Jędrzejewski-Szmek
2014-02-21update gitignoreThomas Hindoe Paaboel Andersen
2014-01-27journal: guarantee async-signal-safety in sd_journald_sendvZbigniew Jędrzejewski-Szmek
signal(7) provides a list of functions which may be called from a signal handler. Other functions, which only call those functions and don't access global memory and are reentrant are also safe. sd_j_sendv was mostly OK, but would call mkostemp and writev in a fallback path, which are unsafe. Being able to call sd_j_sendv in a async-signal-safe way is important because it allows it be used in signal handlers. Safety is achieved by replacing mkostemp with open(O_TMPFILE) and an open-coded writev replacement which uses write. Unfortunately, O_TMPFILE is only available on kernels >= 3.11. When O_TMPFILE is unavailable, an open-coded mkostemp is used. https://bugzilla.gnome.org/show_bug.cgi?id=722889
2014-01-25build-sys: merge libsystemd-login into libsystemdZbigniew Jędrzejewski-Szmek
A compatibility libsystemd-login library is created which uses .symver and ifunc magic proposed by Lennart to make programs linked to the old library name continue to work seamlessly. Unfortunately the bfd linker crashes: https://sourceware.org/bugzilla/show_bug.cgi?id=16467 This will be fixed in binutils 2.25. As a work-around, gold can be used: LDFLAGS=-Wl,-fuse-ld=gold Unfortunately the switch to pick the linker appeared in gcc 4.8. This also doesn't work with LLVM: http://llvm.org/bugs/show_bug.cgi?id=11897
2014-01-14sd-resolv: rename to sd-resolveTom Gundersen
Lennart pointed out that we were misspelling 'resolve'. Let's not repeat the mistakes of 'umount' and 'resolv.conf'.
2014-01-13libsystemd-dns: merge into libsystemdTom Gundersen
Also rename sd-dns -> sd-resolv.
2014-01-13libsystemd-bus: rename to libsystemdTom Gundersen
Documentation was updated to refer to either 'libsystemd' or 'sd-bus' in place of libsystemd-bus.
2014-01-11sd-dns: initial commitDaniel Buch
Origin: <http://0pointer.de/lennart/projects/libasyncns/> [tomegun: renamed some more files asyncns -> sd-dns and moved to libsystemd-bus as requested by Lennart]
2014-01-02Use format patterns for usec_t, pid_t, nsec_t, usec_tZbigniew Jędrzejewski-Szmek
It is nicer to predefine patterns using configure time check instead of using casts everywhere. Since we do not need to use any flags, include "%" in the format instead of excluding it like PRI* macros.
2013-12-28shared: add simplistic XML parser for usage in the D-Bus policy language ↵Lennart Poettering
compat parser
2013-12-16Add bus-driverdDaniel Mack
systemd-bus-driverd is a small daemon that connects to kdbus and implements the org.freedesktop.DBus interface. IOW, it provides the bus functions traditionally taken care for by dbus-daemon. Calls are proxied to kdbus, either via libsystemd-bus (were applicable) or with the open-coded use of ioctl(). Note that the implementation is not yet finished as the functions to add and remove matches and to start services by name are still missing.
2013-12-13bus: install systemd-bus-proxyd unit files for compatibility with dbus1Lennart Poettering