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2014-09-11terminal: fix uninitialized variable in strerror() log messageDavid Herrmann
We currently print weird error-messages if xkbcommon fails (which cannot fail so far, but might in the future). Fix the uninitialized variable warnings by setting 'r' correctly. Thanks to Philippe De Swert for catching this (via coverity).
2014-09-11terminal: drop redundant assertionDavid Herrmann
This assertion is already there two lines down. Drop the redundant assertion.
2014-09-11terminal: fix wrong return value in idev if fcntl() failsDavid Herrmann
This might cause >=0 to be returned, even though the method failed. Fix this and return -errno.
2014-09-11terminal: enable sessions in evcat after taking controlDavid Herrmann
If we enable a session, any probed device might get immediately enabled. This might cause TakeDevice() messages to be sent before we call TakeControl(). Therefore, enable sessions *after* sending TakeControl() so we always succeed if TakeControl() succeeds.
2014-09-11terminal: remove unused set.h inclusion in idevDavid Herrmann
We don't use set.h so no need to include it. We used to include it for temporary refs on all idev devices of a session, but that never was pushed upstream.
2014-09-11terminal: remove redundant "struct" prefixesDavid Herrmann
We define typedefs for all internal types so drop the redundant "struct" prefix.
2014-09-11terminal: discard async read() errors for evdevDavid Herrmann
If read() fails on evdev devices, we deal with this in idev_evdev_hup(). It is very likely this is an async revoke, therefore, we must not abort. Fix our io helper to discard such errors after passing them to idev_evdev_hup(), so we don't bail out of the event loop.
2014-08-30Fix a few more typosRuben Kerkhof
2014-08-28bus: don't skip interfaces in bus_message_map_properties_changed()David Herrmann
Skipping interfaces randomly without the caller specifying it is nasty. Avoid this and let the caller do that themselves.
2014-08-28terminal: free sysview-device names on destructionDavid Herrmann
Don't leak the device-names during device destruction in sysview. Somehow, the device-name is "const char*", so make it "char*" first to avoid warnings when calling free() on it.
2014-08-28terminal: free xkb state on keyboard destructionDavid Herrmann
Fix leaking the xkb-state during keyboard destruction, leaking lots of xkb references into the wild.
2014-08-28terminal: sysview: don't return uninitialized error codesDavid Herrmann
In case 'scan_evdev' and 'scan_drm' are both false, we never set 'r' to anyhting, thus return an uninitialized error code. Fix this by always returning 0 as we catch negative codes earlier, anyway. Thanks to Thomas H.P. Anderson for the report.
2014-08-27terminal: remove unused variableThomas Hindoe Paaboel Andersen
2014-08-27terminal: add systemd-evcat input debugging toolDavid Herrmann
Like systemd-subterm, this new systemd-evcat tool should only be used to debug libsystemd-terminal. systemd-evcat attaches to the running session and pushes all evdev devices attached to the current session into an idev-session. All events of the created idev-devices are then printed to stdout for input-event debugging.
2014-08-27terminal: add xkb-based keyboard devices to idevDavid Herrmann
The idev-keyboard object provides keyboard devices to the idev interface. It uses libxkbcommon to provide proper keymap support. So far, the keyboard implementation is pretty straightforward with one keyboard device per matching evdev element. We feed everything into the system keymap and provide proper high-level keyboard events to the application. Compose-features and IM need to be added later.
2014-08-27terminal: add evdev elements to idevDavid Herrmann
The evdev-element provides linux evdev interfaces as idev-elements. This way, all real input hardware devices on linux can be used with the idev interface. We use libevdev to interface with the kernel. It's a simple wrapper library around the kernel evdev API that takes care to resync devices after kernel-queue overflows, which is a rather non-trivial task. Furthermore, it's a well tested interface used by all other major input users (Xorg, weston, libinput, ...). Last but not least, it provides nice keycode to keyname lookup tables (and vice versa), which is really nice for debugging input problems.
2014-08-27terminal: add input interfaceDavid Herrmann
The idev-interface provides input drivers for all libsystemd-terminal based applications. It is split into 4 main objects: idev_context: The context object tracks global state of the input interface. This will include data like system-keymaps, xkb contexts and more. idev_session: A session serves as controller for a set of devices. Each session on an idev-context is independent of each other. The session is also the main notification object. All events raised via idev are reported through the session interface. Apart of that, the session is a pretty dumb object that just contains devices. idev_element: Elements provide real hardware in the idev stack. For each hardware device, one element is added. Elements have no knowledge of higher-level device types, they only provide raw input data to the upper levels. For example, each evdev device is represented by a different element in an idev session. idev_device: Devices are objects that the application deals with. An application is usually not interested in elements (and those are hidden to applications), instead, they want high-level input devices like keyboard, touchpads, mice and more. Device are the high-level interface provided by idev. Each device might be fed by a set of elements. Elements drive the device. If elements are removed, devices are destroyed. If elements are added, suitable devices are created. Applications should monitor the system for sessions and hardware devices. For each session they want to operate on, they create an idev_session object and add hardware to that object. The idev interface requires the application to monitor the system (preferably via sysview_*, but not required) for hardware devices. Whenever hardware is added to the idev session, new devices *might* be created. The relationship between hardware and high-level idev-devices is hidden in the idev-session and not exposed. Internally, the idev elements and devices are virtual objects. Each real hardware and device type inherits those virtual objects and provides real elements and devices. Those types will be added in follow-up commits. Data flow from hardware to the application is done via idev_*_feed() functions. Data flow from applications to hardware is done via idev_*_feedback() functions. Feedback is usually used for LEDs, FF and similar operations.
2014-08-27terminal: add system view interfaceDavid Herrmann
We're going to need multiple binaries that provide session-services via logind device management. To avoid re-writing the seat/session/device scan/monitor interface for each of them, this commit adds a generic helper to libsystemd-terminal: The sysview interface scans and tracks seats, sessions and devices on a system. It basically mirrors the state of logind on the application side. Now, each session-service can listen for matching sessions and attach to them. On each session, managed device access is provided. This way, it is pretty simple to write session-services that attach to multiple sessions (even split across seats).
2014-08-03terminal: avoid warning about signed-unsigned comparisonZbigniew Jędrzejewski-Szmek
2014-07-29terminal/subterm: use usec_t instead of "unsigned long"David Herrmann
Avoid hard-coding "unsigned long" and use the usec_t type defined in src/shared.
2014-07-18terminal: suppress warning in subtermDavid Herrmann
Empty format-strings are just fine if format-functions do more than printing. This is the case here, so suppress the "empty format-string" warning by using "%s" with an empty argument.
2014-07-18terminal: add unifont font-handlingDavid Herrmann
The unifont layer of libsystemd-terminal provides a fallback font for situations where no system-fonts are available, or if you don't want to deal with traditional font-formats for some reasons. The unifont API mmaps a pre-compiled bitmap font that was generated out of GNU-Unifont font-data. This guarantees, that all users of the font will share the pages in memory. Furthermore, the layout of the binary file allows accessing glyph data in O(1) without pre-rendering glyphs etc. That is, the OS can skip loading pages for glyphs that we never access. Note that this is currently a test-run and we want to include the binary file in the GNU-Unifont package. However, until it was considered stable and accepted by the maintainers, we will ship it as part of systemd. So far it's only enabled with the experimental --enable-terminal, anyway.
2014-07-18terminal: add format attributesThomas Hindoe Paaboel Andersen
2014-07-18terminal: silence warningThomas Hindoe Paaboel Andersen
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 screen-handlingDavid Herrmann
The screen-layer represents the terminal-side (compared to the host-side). It connects term_parser with term_page and implements all the required control sequences. We do not implement all available control sequences. Even though our parser recognizes them, there is no need to handle them. Most of them are legacy or unused. We try to be as compatible to xterm, so if we missed something, we can implement it later. However, all the VT510 / VT440 stuff can safely be skipped (who needs terminal macros? WTF?). The keyboard-handling is still missing. It will be added once systemd-console is available and we pulled in the key-definitions.
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).
2014-07-18terminal: add page handling for terminalsDavid Herrmann
The page-layer is a one-dimensional array of lines. Combined with the one-dimensional lines, you get a two-dimensional page. However, both implementations, lines and pages only deal with their own dimension. That means, lines don't know anything about other lines, and pages don't know anything about cells. Apart from pages, this also introduces history objects. A history object is a scroll-back buffer. As some pages like alt-buffers don't have histories, we keep them separate. Pages itself forward all cell-related operations to the related line. Only line-related operations are directly handled by the page. This is mostly scrolling and history. To support proper resizing, we also keep a fill-state just like lines do for cells.
2014-07-18terminal: extend RGB attributesDavid Herrmann
There're 3 supported color-modes: term-color-codes, 256-color-code and rgb-color. We now use the term-color as default so zero(attr) will do what you'd expect. Furthermore, we split rgb and 256color so users can forward them properly without requiring an internal RGB converter. Furthermore, a "hidden" field according to VT510rm manual is added.
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.