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File tools-0.6.8.obscpio of Package interception-tools
07070100000000000081A4000000000000000000000001619A3A03000001DD000000000000000000000000000000000000001A00000000tools-0.6.8/.clang-formatBasedOnStyle: Google Standard: Cpp11 SortIncludes: false SortUsingDeclarations: false AccessModifierOffset: -4 PointerBindsToType: false DerivePointerBinding: false AllowShortLoopsOnASingleLine: false AllowShortBlocksOnASingleLine : false AllowShortIfStatementsOnASingleLine: false AlwaysBreakTemplateDeclarations: false AlignConsecutiveAssignments: true AlignEscapedNewlinesLeft: true AlignTrailingComments: true AlignOperands: true ColumnLimit: 80 IndentWidth: 4 TabWidth: 4 07070100000001000081A4000000000000000000000001619A3A03000000DD000000000000000000000000000000000000001A00000000tools-0.6.8/.editorconfigroot = true [*] charset = utf-8 end_of_line = lf indent_size = 4 indent_style = space insert_final_newline = true trim_trailing_whitespace = true [*.{md}] trim_trailing_whitespace = false [*.{c,cpp}] max_line_length = 80 07070100000002000081A4000000000000000000000001619A3A0300000514000000000000000000000000000000000000001700000000tools-0.6.8/.gitignore # Created by https://www.gitignore.io/api/c,c++,vim,linux ### C ### # Prerequisites *.d # Object files *.o *.ko *.obj *.elf # Linker output *.ilk *.map *.exp # Precompiled Headers *.gch *.pch # Libraries *.lib *.a *.la *.lo # Shared objects (inc. Windows DLLs) *.dll *.so *.so.* *.dylib # Executables *.exe *.out *.app *.i*86 *.x86_64 *.hex # Debug files *.dSYM/ *.su *.idb *.pdb # Kernel Module Compile Results *.mod* *.cmd modules.order Module.symvers Mkfile.old dkms.conf ### C++ ### # Prerequisites # Compiled Object files *.slo # Precompiled Headers # Compiled Dynamic libraries # Fortran module files *.mod *.smod # Compiled Static libraries *.lai # Executables ### Vim ### # swap [._]*.s[a-v][a-z] [._]*.sw[a-p] [._]s[a-v][a-z] [._]sw[a-p] # session Session.vim # temporary .netrwhist *~ # auto-generated tag files tags ### Linux ### # temporary files which can be created if a process still has a handle open of a deleted file .fuse_hidden* # KDE directory preferences .directory # Linux trash folder which might appear on any partition or disk .Trash-* # .nfs files are created when an open file is removed but is still being accessed .nfs* # End of https://www.gitignore.io/api/c,c++,vim,linux ### Custom ### .lvimrc .tmuxp.yaml .gdb_history .ycm_extra_conf.py 07070100000003000081A4000000000000000000000001619A3A0300000509000000000000000000000000000000000000001B00000000tools-0.6.8/CMakeLists.txtcmake_minimum_required(VERSION 3.0) project(interception-tools) find_package(Boost REQUIRED) find_package(Threads REQUIRED) find_package(PkgConfig) pkg_check_modules(LIBEVDEV REQUIRED libevdev) add_executable(udevmon udevmon.cpp) target_include_directories(udevmon PRIVATE ${LIBEVDEV_INCLUDE_DIRS}) target_compile_options(udevmon PRIVATE -Wall -Wextra -pedantic -std=c++11) target_link_libraries(udevmon evdev udev yaml-cpp) add_executable(intercept intercept.c) target_include_directories(intercept PRIVATE ${LIBEVDEV_INCLUDE_DIRS}) target_compile_options(intercept PRIVATE -Wall -Wextra) target_link_libraries(intercept evdev) add_executable(uinput uinput.cpp) target_include_directories(uinput PRIVATE ${LIBEVDEV_INCLUDE_DIRS}) target_compile_options(uinput PRIVATE -Wall -Wextra -pedantic -std=c++11) target_link_libraries(uinput evdev udev yaml-cpp) add_executable(mux mux.cpp) target_include_directories(mux PRIVATE ${Boost_INCLUDE_DIRS}) target_compile_options(mux PRIVATE -Wall -Wextra -pedantic -std=c++11 -DBOOST_DATE_TIME_NO_LIB) target_link_libraries(mux Threads::Threads rt) install(TARGETS udevmon RUNTIME DESTINATION bin) install(TARGETS intercept RUNTIME DESTINATION bin) install(TARGETS uinput RUNTIME DESTINATION bin) install(TARGETS mux RUNTIME DESTINATION bin) 07070100000004000081A4000000000000000000000001619A3A0300008862000000000000000000000000000000000000001700000000tools-0.6.8/LICENSE.md### GNU GENERAL PUBLIC LICENSE Version 3, 29 June 2007 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. ### Preamble The GNU General Public License is a free, copyleft license for software and other kinds of works. The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change all versions of a program--to make sure it remains free software for all its users. We, the Free Software Foundation, use the GNU General Public License for most of our software; it applies also to any other work released this way by its authors. You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for them if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs, and that you know you can do these things. To protect your rights, we need to prevent others from denying you these rights or asking you to surrender the rights. Therefore, you have certain responsibilities if you distribute copies of the software, or if you modify it: responsibilities to respect the freedom of others. For example, if you distribute copies of such a program, whether gratis or for a fee, you must pass on to the recipients the same freedoms that you received. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. Developers that use the GNU GPL protect your rights with two steps: (1) assert copyright on the software, and (2) offer you this License giving you legal permission to copy, distribute and/or modify it. For the developers' and authors' protection, the GPL clearly explains that there is no warranty for this free software. For both users' and authors' sake, the GPL requires that modified versions be marked as changed, so that their problems will not be attributed erroneously to authors of previous versions. Some devices are designed to deny users access to install or run modified versions of the software inside them, although the manufacturer can do so. This is fundamentally incompatible with the aim of protecting users' freedom to change the software. The systematic pattern of such abuse occurs in the area of products for individuals to use, which is precisely where it is most unacceptable. Therefore, we have designed this version of the GPL to prohibit the practice for those products. If such problems arise substantially in other domains, we stand ready to extend this provision to those domains in future versions of the GPL, as needed to protect the freedom of users. Finally, every program is threatened constantly by software patents. 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If additional permissions apply only to part of the Program, that part may be used separately under those permissions, but the entire Program remains governed by this License without regard to the additional permissions. When you convey a copy of a covered work, you may at your option remove any additional permissions from that copy, or from any part of it. (Additional permissions may be written to require their own removal in certain cases when you modify the work.) You may place additional permissions on material, added by you to a covered work, for which you have or can give appropriate copyright permission. 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All other non-permissive additional terms are considered "further restrictions" within the meaning of section 10. If the Program as you received it, or any part of it, contains a notice stating that it is governed by this License along with a term that is a further restriction, you may remove that term. If a license document contains a further restriction but permits relicensing or conveying under this License, you may add to a covered work material governed by the terms of that license document, provided that the further restriction does not survive such relicensing or conveying. If you add terms to a covered work in accord with this section, you must place, in the relevant source files, a statement of the additional terms that apply to those files, or a notice indicating where to find the applicable terms. Additional terms, permissive or non-permissive, may be stated in the form of a separately written license, or stated as exceptions; the above requirements apply either way. #### 8. Termination. You may not propagate or modify a covered work except as expressly provided under this License. Any attempt otherwise to propagate or modify it is void, and will automatically terminate your rights under this License (including any patent licenses granted under the third paragraph of section 11). However, if you cease all violation of this License, then your license from a particular copyright holder is reinstated (a) provisionally, unless and until the copyright holder explicitly and finally terminates your license, and (b) permanently, if the copyright holder fails to notify you of the violation by some reasonable means prior to 60 days after the cessation. Moreover, your license from a particular copyright holder is reinstated permanently if the copyright holder notifies you of the violation by some reasonable means, this is the first time you have received notice of violation of this License (for any work) from that copyright holder, and you cure the violation prior to 30 days after your receipt of the notice. Termination of your rights under this section does not terminate the licenses of parties who have received copies or rights from you under this License. If your rights have been terminated and not permanently reinstated, you do not qualify to receive new licenses for the same material under section 10. #### 9. Acceptance Not Required for Having Copies. You are not required to accept this License in order to receive or run a copy of the Program. Ancillary propagation of a covered work occurring solely as a consequence of using peer-to-peer transmission to receive a copy likewise does not require acceptance. However, nothing other than this License grants you permission to propagate or modify any covered work. These actions infringe copyright if you do not accept this License. Therefore, by modifying or propagating a covered work, you indicate your acceptance of this License to do so. #### 10. Automatic Licensing of Downstream Recipients. Each time you convey a covered work, the recipient automatically receives a license from the original licensors, to run, modify and propagate that work, subject to this License. You are not responsible for enforcing compliance by third parties with this License. An "entity transaction" is a transaction transferring control of an organization, or substantially all assets of one, or subdividing an organization, or merging organizations. If propagation of a covered work results from an entity transaction, each party to that transaction who receives a copy of the work also receives whatever licenses to the work the party's predecessor in interest had or could give under the previous paragraph, plus a right to possession of the Corresponding Source of the work from the predecessor in interest, if the predecessor has it or can get it with reasonable efforts. You may not impose any further restrictions on the exercise of the rights granted or affirmed under this License. For example, you may not impose a license fee, royalty, or other charge for exercise of rights granted under this License, and you may not initiate litigation (including a cross-claim or counterclaim in a lawsuit) alleging that any patent claim is infringed by making, using, selling, offering for sale, or importing the Program or any portion of it. #### 11. Patents. A "contributor" is a copyright holder who authorizes use under this License of the Program or a work on which the Program is based. The work thus licensed is called the contributor's "contributor version". A contributor's "essential patent claims" are all patent claims owned or controlled by the contributor, whether already acquired or hereafter acquired, that would be infringed by some manner, permitted by this License, of making, using, or selling its contributor version, but do not include claims that would be infringed only as a consequence of further modification of the contributor version. For purposes of this definition, "control" includes the right to grant patent sublicenses in a manner consistent with the requirements of this License. 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If, pursuant to or in connection with a single transaction or arrangement, you convey, or propagate by procuring conveyance of, a covered work, and grant a patent license to some of the parties receiving the covered work authorizing them to use, propagate, modify or convey a specific copy of the covered work, then the patent license you grant is automatically extended to all recipients of the covered work and works based on it. A patent license is "discriminatory" if it does not include within the scope of its coverage, prohibits the exercise of, or is conditioned on the non-exercise of one or more of the rights that are specifically granted under this License. You may not convey a covered work if you are a party to an arrangement with a third party that is in the business of distributing software, under which you make payment to the third party based on the extent of your activity of conveying the work, and under which the third party grants, to any of the parties who would receive the covered work from you, a discriminatory patent license (a) in connection with copies of the covered work conveyed by you (or copies made from those copies), or (b) primarily for and in connection with specific products or compilations that contain the covered work, unless you entered into that arrangement, or that patent license was granted, prior to 28 March 2007. Nothing in this License shall be construed as excluding or limiting any implied license or other defenses to infringement that may otherwise be available to you under applicable patent law. #### 12. No Surrender of Others' Freedom. If conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot convey a covered work so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not convey it at all. For example, if you agree to terms that obligate you to collect a royalty for further conveying from those to whom you convey the Program, the only way you could satisfy both those terms and this License would be to refrain entirely from conveying the Program. #### 13. Use with the GNU Affero General Public License. Notwithstanding any other provision of this License, you have permission to link or combine any covered work with a work licensed under version 3 of the GNU Affero General Public License into a single combined work, and to convey the resulting work. The terms of this License will continue to apply to the part which is the covered work, but the special requirements of the GNU Affero General Public License, section 13, concerning interaction through a network will apply to the combination as such. #### 14. Revised Versions of this License. The Free Software Foundation may publish revised and/or new versions of the GNU General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies that a certain numbered version of the GNU General Public License "or any later version" applies to it, you have the option of following the terms and conditions either of that numbered version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of the GNU General Public License, you may choose any version ever published by the Free Software Foundation. If the Program specifies that a proxy can decide which future versions of the GNU General Public License can be used, that proxy's public statement of acceptance of a version permanently authorizes you to choose that version for the Program. Later license versions may give you additional or different permissions. However, no additional obligations are imposed on any author or copyright holder as a result of your choosing to follow a later version. #### 15. Disclaimer of Warranty. THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. #### 16. Limitation of Liability. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. #### 17. Interpretation of Sections 15 and 16. If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee. END OF TERMS AND CONDITIONS ### How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. <one line to give the program's name and a brief idea of what it does.> Copyright (C) <year> <name of author> This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. Also add information on how to contact you by electronic and paper mail. If the program does terminal interaction, make it output a short notice like this when it starts in an interactive mode: <program> Copyright (C) <year> <name of author> This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands \`show w' and \`show c' should show the appropriate parts of the General Public License. Of course, your program's commands might be different; for a GUI interface, you would use an "about box". You should also get your employer (if you work as a programmer) or school, if any, to sign a "copyright disclaimer" for the program, if necessary. For more information on this, and how to apply and follow the GNU GPL, see <http://www.gnu.org/licenses/>. The GNU General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. But first, please read <http://www.gnu.org/philosophy/why-not-lgpl.html>. 07070100000005000081A4000000000000000000000001619A3A0300005828000000000000000000000000000000000000001600000000tools-0.6.8/README.md# Interception Tools A minimal composable infrastructure on top of [`libudev`][libudev] and [`libevdev`][libevdev]. The _Interception Tools_ is a small set of utilities for operating on input events of `evdev` devices: ### udevmon ```text udevmon - monitor input devices for launching tasks usage: udevmon [-h | -c configuration.yaml] options: -h show this message and exit -c configuration.yaml use configuration.yaml as configuration /etc/interception/udevmon.d/*.yaml is also read if present ``` ### intercept ```text intercept - redirect device input events to stdout usage: intercept [-h | [-g] devnode] options: -h show this message and exit -g grab device devnode path of device to capture events from ``` ### uinput ```text uinput - redirect device input events from stdin to virtual device usage: uinput [-h | [-p] [-c device.yaml] [-d devnode]] options: -h show this message and exit -p show resulting YAML device description merge and exit -c device.yaml merge YAML device description to resulting virtual device (repeatable) -d devnode merge reference device description to resulting virtual device (repeatable) ``` ### mux ```text mux - mux streams of input events usage: mux [-h | [-s size] -c name | [-i name] [-o name]] options: -h show this message and exit -s size muxer's queue size (default: 100) -c name name of muxer to create (repeatable) -i name name of muxer to read input from or switch on (repeatable in switch mode) -o name name of muxer to write output to (repeatable) ``` ## Runtime dependencies - [libevdev][] - [libudev][] - [yaml-cpp][] - [glibc][] ## Build dependencies - [CMake][cmake] - [Boost.Interprocess][interprocess] ## Additional Tools - [uswitch][]: _redirect stdin to a muxer if logged user matches_ - [xswitch][]: _redirect stdin to a muxer if window matches_ ## Official Plugins - [caps2esc][]: _transforming the most useless key ever in the most useful one_ - [space2meta][]: _turn your space key into the meta key when chorded to another key (on key release only)_ - [hideaway][]: _move the mouse pointer out of sight after a couple of seconds_ - [dual-function-keys][]: _tap for one key, hold for another_ ## Some Community Plugins - [ralt2hyper][]: _Remap Right Alt (commonly AltGr) to Hyper (i.e. Control, Alt and Super)_ - [chorded_keymap][] - [interception-vimproved][] - [interception-k2k][] ## Execution The following daemonized sample execution increases `udevmon` priority (since it'll be responsible for a vital input device, just to make sure it stays responsible): ```text $ sudo nice -n -20 udevmon -c udevmon.yaml >udevmon.log 2>udevmon.err & ``` The usual route, though, is simply to use the provided systemd unit or OpenRC init script. ## Installation ### Archlinux It's available from [community](https://archlinux.org/packages/community/x86_64/interception-tools/): ```text $ pacman -S interception-tools ``` ### Void Linux ```text $ xbps-install -S interception-tools ``` ### Ubuntu ([independent package][ubuntu]) ```text sudo add-apt-repository ppa:deafmute/interception sudo apt install interception-tools ``` <sub>For Debian and other derivatives you can download directly at <https://launchpad.net/~deafmute/+archive/ubuntu/interception/+packages>.</sub> Or if building from sources, these are the dependencies: ```text $ sudo apt install cmake libevdev-dev libudev-dev libyaml-cpp-dev libboost-dev ``` [ubuntu]: https://gitlab.com/interception/linux/tools/-/issues/38 ### Fedora ([independent package][fedora]) ```text $ sudo dnf copr enable fszymanski/interception-tools $ sudo dnf install interception-tools ``` Or if building from sources, these are the dependencies: ```text $ dnf install cmake libevdev-devel systemd-devel yaml-cpp-devel boost-devel ``` [fedora]: https://gitlab.com/interception/linux/tools/-/merge_requests/11 ## Building ```text $ git clone https://gitlab.com/interception/linux/tools.git interception-tools $ cd interception-tools $ cmake -B build -DCMAKE_BUILD_TYPE=Release $ cmake --build build ``` ## How It Works First, lets check where [`libevdev`][libevdev] sits in the input system from its documentation: > ### Where does libevdev sit? > > libevdev is essentially a read(2) on steroids for /dev/input/eventX devices. > It sits below the process that handles input events, in between the kernel and > that process. In the simplest case, e.g. an evtest-like tool the stack would > look like this: > > `kernel → libevdev → evtest` > > For X.Org input modules, the stack would look like this: > > `kernel → libevdev → xf86-input-evdev → X server → X client` > > For Weston/Wayland, the stack would look like this: > > `kernel → libevdev → Weston → Wayland client` > > libevdev does **not** have knowledge of X clients or Wayland clients, it is > too low in the stack. The tools here relying on [`libevdev`][libevdev] are `intercept` and `uinput`. `intercept`'s purpose is to capture input from a given device (optionally _grabbing_ it) and write such raw input to `stdout`. `uinput` does the reverse, it receives raw input from `stdin` and write it to a virtual `uinput` device created by cloning characteristics of real devices, from YAML configuration, or both. So, assuming `$DEVNODE` as the path of the device, something like `/dev/input/by-id/some-kbd-id`, the following results in a no-op: `intercept -g $DEVNODE | uinput -d $DEVNODE` In this case using `-g` is important so that the target device is _grabbed_ for exclusive access, allowing the new virtual device created by `uinput` to substitute it completely: we grab it and others can grab the clone. Now additional processing can be added in the middle easily. For example, with this trivial program (let's call it `x2y`): ```c #include <stdio.h> #include <stdlib.h> #include <linux/input.h> int main(void) { setbuf(stdin, NULL), setbuf(stdout, NULL); struct input_event event; while (fread(&event, sizeof(event), 1, stdin) == 1) { if (event.type == EV_KEY && event.code == KEY_X) event.code = KEY_Y; fwrite(&event, sizeof(event), 1, stdout); } } ``` We replace `x` and `y` for a given keyboard with: `intercept -g $DEVNODE | x2y | uinput -d $DEVNODE` Now if we also have a `y2z` program we can compose both as `intercept -g $DEVNODE | x2y | y2z | uinput -d $DEVNODE` or as `intercept -g $DEVNODE | y2z | x2y | uinput -d $DEVNODE` and notice how the composition order `x2y | y2z` vs `y2z | x2y` is relevant in this case. The first most probably doesn't produce the desired composition because one affects the other and the final behavior actually becomes `x2z` and `y2z`, which doesn't happen in the later composition. **The `uinput` tool has another purpose besides emulation which is just to print a device's description in YAML format**. `uinput -p -d /dev/input/by-id/my-kbd` prints `my-kbd` characteristics in YAML, which itself can be fed back to `uinput` as `uinput -c my-kbd.yaml`. It can also merge device and YAML characteristics, for example, ```text uinput -p -d /dev/input/by-id/my-kbd -d /dev/input/by-id/my-mouse -c my-extra.yaml ``` merges `my-kbd`, `my-mouse` and `my-extra.yaml` into a single YAML output (the characteristics that aren't lists are “merged” by overriding the previous when they are present on both inputs). This allows creating hybrid virtual devices that, for example, act as both keyboard and mouse (see caveats section on hybrid devices). Explicitly calling `intercept` and `uinput` on specific devices can be cumbersome, that's where `udevmon` helps. `udevmon` accepts a YAML configuration with a list of _jobs_ (`sh` commands by default) to be executed in case the device matches a given description. For example: ```yaml - JOB: intercept -g $DEVNODE | y2z | x2y | uinput -d $DEVNODE DEVICE: EVENTS: EV_KEY: [KEY_X, KEY_Y] ``` Calling `udevmon` with this configuration sets it to launch the given command for whatever device that responds to `KEY_X` or `KEY_Y`. It will monitor for any device that is already attached or that gets attached. The `$DEVNODE` environment variable is set to the path of the matching device. To only match devices that produce _all the given events_ instead of just _any of the given events_, you do: ```yaml - JOB: intercept -g $DEVNODE | magic | uinput -d $DEVNODE DEVICE: EVENTS: EV_KEY: [KEY_A, KEY_B, [KEY_X, KEY_Y]] ``` Which will match if the device responds to either `KEY_A`, `KEY_B`, `KEY_X` _and_ `KEY_Y`. If device specific interception is more desirable, it's simpler to use the `LINK` configuration as the device selector, for example: ```yaml - JOB: intercept -g $DEVNODE | caps2esc | uinput -d $DEVNODE DEVICE: LINK: /dev/input/by-id/usb-SEMITEK_USB-HID_Gaming_Keyboard_SN0000000001-event-kbd ``` This way, only [the device that produces that link][sk61] will have [caps2esc][] applied. A more involved configuration may need to combine (or just observe) the input of two devices to make decisions. That's where the `mux` tool comes at hand: ```yaml - CMD: mux -c caps2esc - JOB: mux -i caps2esc | caps2esc | uinput -c /etc/interception/gaming-keyboard.yaml - JOB: intercept -g $DEVNODE | mux -o caps2esc DEVICE: LINK: /dev/input/by-id/usb-SEMITEK_USB-HID_Gaming_Keyboard_SN0000000001-event-kbd - JOB: intercept $DEVNODE | mux -o caps2esc DEVICE: LINK: /dev/input/by-id/usb-Logitech_USB_Receiver-if02-event-mouse ``` The `mux` tool serves to combine multiple pipelines into one. A _muxer_ first needs to be created with a name in a `CMD` (differently from `JOB`s, `CMD`s are executed sequentially when the service starts and are waited for successful termination). The muxer can then be used from multiple pipelines as an output or as the input of a given pipeline. After the muxer creation, a _standalone job_ not associated with any device (which makes it just a command executed when `udevmon` starts, but not waited for) is launched to consume the muxer and pass what arrives from it to `caps2esc` and, finally, to the virtual device created from `gaming-keyboard.yaml` (see caveats section on device links). In the example above, when the keyboard is connected, it's grabbed and its input events are sent to the “caps2esc” muxer that was initially created. _Observed_ input (not grabbed) from mouse is also sent to the same muxer. The buttons of the mouse generate `EV_KEY` events, so `caps2esc` will accept them, making “Caps Lock + Click” work as “Control + Click”. As in this case the final target cloned device clones the keyboard, not a mouse, if mouse events reach it from muxing multiple pipelines, they won't be reproduced, hence not duplicating the _observed_ mouse events. If a device happens to match multiple job descriptions, only the first job that matches gets executed. This allows for device specific jobs, while still having fallback configurations: ```yaml - JOB: intercept -g $DEVNODE | caps2esc -m 2 | uinput -d $DEVNODE DEVICE: LINK: /dev/input/by-id/usb-SEMITEK_USB-HID_Gaming_Keyboard_SN0000000001-event-kbd - JOB: intercept -g $DEVNODE | caps2esc | uinput -d $DEVNODE DEVICE: EVENTS: EV_KEY: [[KEY_CAPSLOCK, KEY_ESC]] LINK: .*-event-kbd ``` In the above example, if an attached keyboard produces the given link, `caps2esc -m 2` will be applied to it, otherwise, `caps2esc` in default mode will be applied (_if_ the keyboard has both `KEY_CAPSLOCK` _and_ `KEY_ESC` and a device link that ends with `-event-kbd`, [to exclude mice that report those keys][caps2esc-issue-15-note]). Also, note that configuration files found on `/etc/interception/udevmon.d/` are read first, so you can have device specific configurations there, and fallbacks on `/etc/interception/udevmon.yaml`. Besides combining pipelines, the `mux` tool can duplicate them (multiple `-o`s) and even act as a _switch_, based on activity in other pipelines (`-i` and `-o` intermixed). Which brings us to our lasting, _slightly complex_, use case: Let's imagine the following setup: - You want to grab keyboards (here after referred as `K`) and mice (`M`) and combine input coming from these two groups into `KM`, to apply multi device chording - You have a generic filter (`caps2esc`) you want to apply to combined keyboard/mouse input - But when you're using some specific keyboards (`X`), you want the combined input (`XM`) to go through a different filter (`caps2esc -m 2`) Voilà: ```yaml - CMD: mux -c K -c X -c M -c KM -c XM -c H - JOB: - mux -i M | mux -o KM -i K -o KM -i X -o XM - mux -i KM | caps2esc | mux -o H - mux -i XM | caps2esc -m 2 | mux -o H - mux -i H | uinput -c /etc/interception/hybrid.yaml - JOB: intercept -g $DEVNODE | mux -o X -o XM DEVICE: LINK: /dev/input/by-id/usb-SEMITEK_USB-HID_Gaming_Keyboard_SN0000000001-event-kbd - JOB: intercept -g $DEVNODE | mux -o M DEVICE: EVENTS: EV_KEY: [BTN_LEFT, BTN_TOUCH] - JOB: intercept -g $DEVNODE | mux -o K -o KM DEVICE: EVENTS: EV_KEY: [[KEY_CAPSLOCK, KEY_ESC]] NAME: .*[Kk]eyboard.* LINK: .*-event-kbd ``` Don't be afraid as it's pretty simple to break it down. First, as can be seen, at the bottom we have device detection for three device groups (as modeled previously). The keyboard events are consumed and duplicated out, this happens so that consumption of these events can happen in parallel both for purposes of checking there's activity in a particular group (`mux -o K …` and `mux -o X …`), as for the final consumption of keyboard and mouse events muxed together (`mux … -o KM` and `mux … -o XM`). The mouse events are consumed and sent to the `M` muxer for further processing. <sub>_**Notice** that when multiple devices match a given device job description, a job instance per device will run, so, consuming a muxer (`mux … -i …`) from device jobs would create a race condition of multiple job instances competing for the same events of a given muxer. That's why, here, device jobs solely write to muxers (`mux -o`), which is fine for muxing the events of all matching devices into a single stream, but the reading of a muxer only happens in standalone jobs, for which there's only one instance running for its consumption. Also, muxer writing doesn't implicate in any problem in case the device disconnects and its job gets dropped. Dropping a pipeline in reading state ends up leading to muxer corruption, while standalone jobs only finish when the `udevmon` service is stopped._</sub> On `mux -i M | mux -o KM -i K -o KM -i X -o XM` we get to the core of the design. Here `M` is consumed and gets redirected either to `KM`, if there's activity in `K` (`-i K -o KM`), or `XM`, if there's activity in `X` (`-i X -o XM`). The first `-o KM` makes `KM` the default route for input coming from `M` (in case no activity ever happens in `K` or `X`). In the end we only have `KM` and `XM` to consume input from, as we have that input from group `K` goes to `KM`, input from group `X` goes to `XM`, and input from group `M` goes either to `KM` or `XM`. For `KM` then we apply `caps2esc`, but for `XM` we apply `caps2esc -m 2`. And regardless the route that input goes through, we send it to the final `H` endpoint, which gets consumed by a hybrid virtual device (e.g. `sudo uinput -p -d /dev/input/by-id/usb-Logitech_USB_Receiver-if02-event-mouse -d /dev/input/by-id/usb-SEMITEK_USB-HID_Gaming_Keyboard_SN0000000001-event-kbd | sudo tee /etc/interception/hybrid.yaml`). As a final note on the `mux` tool in switch mode, `mux -i e | mux -o o -i i` would redirect `e` to `o` by default, but once there's activity in `i`, `e` is redirected to nowhere. And if you have `mux -i e | mux -i i -o o`, as there isn't any default output, `e` gets redirected to `o` only after first detected activity in `i`. Besides that, you can have `-i x -i y -i etc -o z` to redirect to `z` out of activity either from `x`, `y` or `etc` and you can have `-i x -o y -o z -o etc` to redirect to `y`, `z` and `etc` out of `x` activity. Both aspects can be combined in `-i w -i x -o y -o z`. The “full” YAML based spec is as follows: ```yaml SHELL: LA --- - CMD: S | LS - JOB: S | LS DEVICE: LINK: R NAME: R LOCATION: R PRODUCT: R VENDOR: R BUSTYPE: R DRIVER_VERSION: R PROPERTIES: LP EVENTS: EV_KEY: LE EV_REL: LE ... ``` Where: - `LA`: shell replacement, like `[zsh, -c]`, default is `[sh, -c]`. - `S` | `LS` : shell command string, or a list of shell command strings. - `R`: regular expression string. - `LP`: list of any _properties or set of properties_ (by name or code), the device can have. - `LE`: list of any _events or set of events_ (by name or code), of a given type, that the device can produce. - The regular expression grammar supported is [Modified ECMAScript][ecmascript]. - There can be any number of jobs. - An empty event list means the device should respond to whatever event of the given event type. - Property names and event types and names are taken from [`<linux/input-event-codes.h>`][input-event-codes]. ## Plugin Guidelines ### Correct synthesization of event sequences A plugin that's going to synthesize event sequences programmatically (not the case for simple key swapping, like `x2y` above), for keyboard at least, is required to provide `EV_SYN` events and a short delay (to have different event timestamps), between key events. This is what happens when you type on a real keyboard, and [has been proved necessary][ev-syn] for applications to behave well. As a general guideline, one should explore how real devices behave while generating events (with `evtest` for example) for mimicking them with success. ## Caveats ### Correct process priority Always use a high process priority (low _niceness_ level, `udevmon.service` uses `-20`) when executing tools that manipulate input, otherwise you may get [unwanted effects][niceness]. Without _Interception Tools_, your input is treated with high priority at kernel level, and you should try to resemble that now on user mode, which is the level where the tools run. ### Hybrid device configurations _Note that hybrid devices may not always work_. For example, on my PC, merging my mouse and keyboard into a single device does create a working hybrid device that can respond for all their events, but on an old laptop, merging the built-in i8042 keyboard and i8042 touchpad created a non-working hybrid that can only respond for the touchpad's events (it seems `EV_ABS` and keyboard `EV_KEY`s didn't work together in this machine). To fix that I stored the configurations in different files, and checked they didn't respond for any identical events. Then I used these two as virtual output for the same muxed stream of events, but given that the virtual devices don't respond for the same events, these don't get duplicated but instead effectively get split from a single stream into their relevant virtual devices: ```yaml - CMD: mux -c caps2esc -c keyboard -c mouse - JOB: - mux -i caps2esc | caps2esc | mux -o keyboard -o mouse - mux -i keyboard | uinput -c /etc/interception/keyboard.yaml - mux -i mouse | uinput -c /etc/interception/mouse.yaml - JOB: intercept -g $DEVNODE | mux -o caps2esc DEVICE: NAME: AT Translated Set 2 keyboard - JOB: intercept -g $DEVNODE | mux -o caps2esc DEVICE: NAME: ETPS/2 Elantech Touchpad ``` ### Device links Depending on the system, device links (`by-id`, `by-path`, etc) may not exist at all, or not be readily available when the machine boots, which may make it unreliable to refer to them on _standalone jobs_ which execute when `udevmon` starts on boot. It's safe to refer to them on device jobs, as these only start when the link actually becomes present. Hence, on standalone jobs it's generally better practice to refer to previously stored YAML device configurations instead. On a machine that produce links, referring to them on standalone jobs may or may not work on boot. You may verify that by rebooting and checking whether `udevmon` give errors on boot or not. ## Software Alternatives - [mxk](http://welz.org.za/projects/mxk) - [uinput-mapper](https://github.com/MerlijnWajer/uinput-mapper/) [cmake]: https://cmake.org [uinput]: https://www.kernel.org/doc/html/latest/input/uinput.html [libudev]: https://www.freedesktop.org/software/systemd/man/libudev.html [libevdev]: https://www.freedesktop.org/software/libevdev/doc/latest/index.html [yaml-cpp]: https://github.com/jbeder/yaml-cpp [glibc]: https://www.gnu.org/software/libc [interprocess]: https://www.boost.org/doc/libs/release/libs/interprocess [uswitch]: https://gitlab.com/interception/linux/plugins/uswitch [xswitch]: https://gitlab.com/interception/linux/plugins/xswitch [caps2esc]: https://gitlab.com/interception/linux/plugins/caps2esc [space2meta]: https://gitlab.com/interception/linux/plugins/space2meta [hideaway]: https://gitlab.com/interception/linux/plugins/hideaway [dual-function-keys]: https://gitlab.com/interception/linux/plugins/dual-function-keys [ralt2hyper]: https://gitlab.com/oarmstrong/ralt2hyper [chorded_keymap]: https://gitlab.com/wsha/chorded_keymap [interception-vimproved]: https://github.com/maricn/interception-vimproved [interception-k2k]: https://github.com/zsugabubus/interception-k2k [sk61]: https://epomaker.com/products/epomaker-sk61 [caps2esc-issue-15-note]: https://gitlab.com/interception/linux/plugins/caps2esc/-/issues/15#note_476593423 [ecmascript]: http://en.cppreference.com/w/cpp/regex/ecmascript [input-event-codes]: https://github.com/torvalds/linux/blob/master/include/uapi/linux/input-event-codes.h [ev-syn]: https://gitlab.com/interception/linux/tools/-/issues/29#note_474260470 [niceness]: https://gitlab.com/interception/linux/tools/-/issues/29#note_474310306 ## License _Interception Tools_ is **dual-licensed**. To be embedded and redistributed as part of a proprietary solution, contact me at francisco+interception@nosubstance.me for commercial licensing, otherwise it's under <a href="https://gitlab.com/interception/linux/tools/blob/master/LICENSE.md"> <img src="https://www.gnu.org/graphics/gplv3-127x51.png" alt="GPLv3"> </a> Copyright © 2017 Francisco Lopes da Silva 07070100000006000081A4000000000000000000000001619A3A0300000868000000000000000000000000000000000000001800000000tools-0.6.8/intercept.c#include <errno.h> #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <libevdev/libevdev.h> void print_usage(FILE *stream, const char *program) { fprintf(stream, "intercept - redirect device input events to stdout\n" "\n" "usage: %s [-h | [-g] devnode]\n" "\n" "options:\n" " -h show this message and exit\n" " -g grab device\n" " devnode path of device to capture events from\n", program); } int main(int argc, char *argv[]) { int grab = 0; for (int opt; (opt = getopt(argc, argv, "hg")) != -1;) { switch (opt) { case 'h': return print_usage(stdout, argv[0]), EXIT_SUCCESS; case 'g': if (grab) break; grab = 1; continue; } return print_usage(stderr, argv[0]), EXIT_FAILURE; } if (optind != argc - 1) return print_usage(stderr, argv[0]), EXIT_FAILURE; int fd = open(argv[optind], O_RDONLY); if (fd < 0) return perror("open failed"), EXIT_FAILURE; int result = EXIT_FAILURE; struct libevdev *dev; if (libevdev_new_from_fd(fd, &dev) < 0) goto teardown_fd; if (grab && libevdev_grab(dev, LIBEVDEV_GRAB) < 0) goto teardown_dev; setbuf(stdout, NULL); for (;;) { struct input_event input; int rc = libevdev_next_event( dev, LIBEVDEV_READ_FLAG_NORMAL | LIBEVDEV_READ_FLAG_BLOCKING, &input); while (rc == LIBEVDEV_READ_STATUS_SYNC) rc = libevdev_next_event(dev, LIBEVDEV_READ_FLAG_SYNC, &input); if (rc == -EAGAIN) continue; if (rc != LIBEVDEV_READ_STATUS_SUCCESS) break; if (fwrite(&input, sizeof input, 1, stdout) != 1) goto teardown_grab; } result = EXIT_SUCCESS; teardown_grab: if (grab) libevdev_grab(dev, LIBEVDEV_UNGRAB); teardown_dev: libevdev_free(dev); teardown_fd: close(fd); return result; } 07070100000007000081A4000000000000000000000001619A3A0300002021000000000000000000000000000000000000001400000000tools-0.6.8/mux.cpp#include <map> #include <atomic> #include <cstdio> #include <memory> #include <string> #include <thread> #include <vector> #include <cstdlib> #include <stdexcept> extern "C" { #include <unistd.h> #include <linux/input.h> } #include <boost/interprocess/ipc/message_queue.hpp> using boost::interprocess::open_only; using boost::interprocess::create_only; using boost::interprocess::message_queue; void print_usage(std::FILE *stream, const char *program) { // clang-format off std::fprintf(stream, "mux - mux streams of input events\n" "\n" "usage: %s [-h | [-s size] -c name | [-i name] [-o name]]\n" "\n" "options:\n" " -h show this message and exit\n" " -s size muxer's queue size (default: 100)\n" " -c name name of muxer to create (repeatable)\n" " -i name name of muxer to read input from or switch on\n" " (repeatable in switch mode)\n" " -o name name of muxer to write output to (repeatable)\n", program); // clang-format on } std::atomic<size_t> current_muxer{0}; int main(int argc, char *argv[]) try { enum { NO_MODE, CREATE_MODE, INPUT_MODE, OUTPUT_MODE, SWITCH_MODE } mode = NO_MODE; std::map<std::string, std::vector<std::string>> muxer_names; std::vector<size_t> muxer_sizes; size_t muxer_size = 100; std::vector<std::string> input_muxer_names = {""}; for (int opt, last_opt = 0; (opt = getopt(argc, argv, "hs:c:i:o:")) != -1;) { switch (opt) { case 'h': return print_usage(stdout, argv[0]), EXIT_SUCCESS; case 's': if (last_opt && last_opt != 'c') break; muxer_size = std::stoul(optarg); last_opt = 's'; continue; case 'c': if (last_opt && last_opt != 'c' && last_opt != 's') break; mode = CREATE_MODE; muxer_names[""].push_back(optarg); muxer_sizes.push_back(muxer_size); last_opt = 'c'; continue; case 'i': if (last_opt && last_opt != 'i' && last_opt != 'o') break; if (!last_opt) { mode = INPUT_MODE; input_muxer_names = {}; } else if (last_opt == 'o') { mode = SWITCH_MODE; input_muxer_names = {}; } muxer_names[optarg]; input_muxer_names.push_back(optarg); last_opt = 'i'; continue; case 'o': if (last_opt && last_opt != 'i' && last_opt != 'o') break; if (!last_opt) mode = OUTPUT_MODE; else if (last_opt == 'i') mode = SWITCH_MODE; for (const auto &name : input_muxer_names) muxer_names[name].push_back(optarg); last_opt = 'o'; continue; } return print_usage(stderr, argv[0]), EXIT_FAILURE; } switch (mode) { case NO_MODE: return print_usage(stderr, argv[0]), EXIT_FAILURE; case CREATE_MODE: { auto muxer_size = muxer_sizes.begin(); for (const auto &muxer_name : muxer_names[""]) { message_queue::remove(muxer_name.c_str()); message_queue(create_only, muxer_name.c_str(), *muxer_size, sizeof(input_event), 0600); ++muxer_size; } } break; case INPUT_MODE: { if (muxer_names.size() != 1) return print_usage(stderr, argv[0]), EXIT_FAILURE; message_queue muxer(open_only, muxer_names.begin()->first.c_str()); std::setbuf(stdout, nullptr); input_event input; unsigned int priority; message_queue::size_type size; for (;;) { muxer.receive(&input, sizeof input, size, priority); if (size != sizeof input) throw std::runtime_error( "unexpected input event size while reading from input " "event queue"); else if (std::fwrite(&input, sizeof input, 1, stdout) != 1) throw std::runtime_error( "error writing input event to stdout"); } } break; case OUTPUT_MODE: { std::vector<std::unique_ptr<message_queue>> muxers; for (const auto &muxer_name : muxer_names[""]) muxers.emplace_back( new message_queue(open_only, muxer_name.c_str())); std::setbuf(stdin, nullptr); input_event input; for (;;) if (std::fread(&input, sizeof input, 1, stdin) == 1) { for (auto &muxer : muxers) if (!muxer->try_send(&input, sizeof input, 0)) throw std::runtime_error( "outgoing muxer is full, exiting"); } else if (std::ferror(stdin)) throw std::runtime_error( "error reading input event from stdin"); else if (std::feof(stdin)) break; } break; case SWITCH_MODE: { std::vector<std::vector<std::unique_ptr<message_queue>>> muxers; muxers.emplace_back(); for (const auto &muxer_name : muxer_names[""]) muxers.back().emplace_back( new message_queue(open_only, muxer_name.c_str())); size_t id = 0; for (const auto &muxer_name : muxer_names) { if (muxer_name.first.empty()) continue; muxers.emplace_back(); for (const auto &name : muxer_name.second) muxers.back().emplace_back( new message_queue(open_only, name.c_str())); std::thread( [](std::unique_ptr<message_queue> muxer, size_t id) { try { input_event input; unsigned int priority; message_queue::size_type size; for (;;) { muxer->receive(&input, sizeof input, size, priority); if (size == sizeof input) current_muxer = id; } } catch (...) { } }, std::unique_ptr<message_queue>( new message_queue(open_only, muxer_name.first.c_str())), ++id) .detach(); } std::setbuf(stdin, nullptr); input_event input; for (;;) if (std::fread(&input, sizeof input, 1, stdin) == 1) { size_t current = current_muxer; for (auto &muxer : muxers[current]) if (!muxer->try_send(&input, sizeof input, 0)) throw std::runtime_error( "outgoing muxer is full, exiting"); } else if (std::ferror(stdin)) throw std::runtime_error( "error reading input event from stdin"); else if (std::feof(stdin)) break; } break; } } catch (const std::exception &e) { return std::fprintf(stderr, R"(an exception occurred: "%s")" "\n", e.what()), EXIT_FAILURE; } 07070100000008000081A4000000000000000000000001619A3A0300006854000000000000000000000000000000000000001800000000tools-0.6.8/udevmon.cpp#include <map> #include <regex> #include <cctype> #include <cerrno> #include <cstdio> #include <memory> #include <string> #include <vector> #include <cstdlib> #include <cstring> #include <algorithm> #include <stdexcept> extern "C" { #include <fcntl.h> #include <dirent.h> #include <signal.h> #include <unistd.h> #include <sys/wait.h> #include <sys/types.h> #include <sys/select.h> } #include <libudev.h> #include <libevdev/libevdev.h> #include <libevdev/libevdev-uinput.h> #include <yaml-cpp/yaml.h> using yaml = std::vector<YAML::Node>; void print_usage(std::FILE *stream, const char *program) { // clang-format off std::fprintf(stream, "udevmon - monitor input devices for launching tasks\n" "\n" "usage: %s [-h | -c configuration.yaml]\n" "\n" "options:\n" " -h show this message and exit\n" " -c configuration.yaml use configuration.yaml as configuration\n" "\n" "/etc/interception/udevmon.d/*.yaml is also read if present\n", program); // clang-format on } struct cmd { cmd(const YAML::Node &job_node, const YAML::Node &settings_doc = {}) { using std::string; using std::vector; using std::invalid_argument; if (job_node.size() != 1) throw invalid_argument("wrong number of fields in job node"); YAML::Node cmd_node; if (job_node["CMD"]) { this->wait = true; cmd_node = job_node["CMD"]; } else if (job_node["JOB"]) { this->wait = false; cmd_node = job_node["JOB"]; } else throw invalid_argument("missing JOB or CMD field in job node"); vector<string> cmd_pieces = {"sh", "-c"}; if (auto shell = settings_doc["SHELL"]) cmd_pieces = shell.as<vector<string>>(); if (!cmd_node.IsSequence()) { cmd_pieces.push_back(cmd_node.as<string>()); this->cmds.push_back(cmd_pieces); } else for (const auto &subcmd_node : cmd_node) { auto pieces = cmd_pieces; pieces.push_back(subcmd_node.as<string>()); this->cmds.push_back(pieces); } } std::vector<pid_t> launch() const { std::vector<pid_t> pids; for (size_t i = 0; i < cmds.size(); ++i) { pid_t pid = fork(); switch (pid) { case -1: { for (auto pid : pids) kill(-pid, SIGTERM); std::string e = "fork failed for \""; e.append(cmds[i].back()); e.append("\" with error \""); e.append(std::strerror(errno)); e.append("\""); throw std::runtime_error(e); } case 0: { std::unique_ptr<char *[]> command { new char *[cmds[i].size() + 1] }; for (size_t j = 0; j < cmds[i].size(); ++j) command[j] = const_cast<char *>(cmds[i][j].c_str()); command[cmds[i].size()] = nullptr; char *environment[] = {nullptr}; setpgid(0, 0); execvpe(command[0], command.get(), environment); std::string e = "exec failed for \""; e.append(cmds[i].back()); e.append("\" with error \""); e.append(std::strerror(errno)); e.append("\""); throw std::runtime_error(e); } break; default: if (wait) { siginfo_t info; waitid(P_PID, pid, &info, WEXITED); if (info.si_code != CLD_EXITED) { for (auto pid : pids) kill(-pid, SIGTERM); std::string e = "command \""; e.append(cmds[i].back()); e.append("\" terminated abnormally"); throw std::runtime_error(e); } else if (info.si_status != EXIT_SUCCESS) { for (auto pid : pids) kill(-pid, SIGTERM); std::string e = "command \""; e.append(cmds[i].back()); e.append("\" exited with error \""); e.append(std::strerror(info.si_errno)); e.append("\""); throw std::runtime_error(e); } } else pids.push_back(pid); break; } } return pids; } bool wait; std::vector<std::vector<std::string>> cmds; }; struct job { job(const YAML::Node &job_node, const YAML::Node &settings_doc = {}) { using std::regex; using std::string; using std::vector; using std::invalid_argument; if (job_node.size() != 2) throw invalid_argument("wrong number of fields in job node"); if (!job_node["JOB"]) throw invalid_argument("missing JOB field in job node"); if (!job_node["DEVICE"]) throw invalid_argument("missing DEVICE field in job node"); auto cmd_node = job_node["JOB"]; vector<string> cmd_pieces = {"sh", "-c"}; if (auto shell = settings_doc["SHELL"]) cmd_pieces = shell.as<vector<string>>(); if (!cmd_node.IsSequence()) { cmd_pieces.push_back(cmd_node.as<string>()); this->cmds.push_back(cmd_pieces); } else for (const auto &subcmd_node : cmd_node) { auto pieces = cmd_pieces; pieces.push_back(subcmd_node.as<string>()); this->cmds.push_back(pieces); } auto device = job_node["DEVICE"]; if (auto link = device["LINK"]) { this->has_link = true; this->link.assign(link.as<string>(), regex::optimize); } if (auto name = device["NAME"]) this->name.assign(name.as<string>(), regex::optimize); if (auto location = device["LOCATION"]) this->location.assign(location.as<string>(), regex::optimize); if (auto id = device["ID"]) this->id.assign(id.as<string>(), regex::optimize); if (auto product = device["PRODUCT"]) this->product.assign(product.as<string>(), regex::optimize); if (auto vendor = device["VENDOR"]) this->vendor.assign(vendor.as<string>(), regex::optimize); if (auto bustype = device["BUSTYPE"]) this->bustype.assign(bustype.as<string>(), regex::optimize); if (auto driver_version = device["DRIVER_VERSION"]) this->driver_version.assign(driver_version.as<string>(), regex::optimize); auto is_int = [](const std::string &s) { return s.find_first_not_of("0123456789") == std::string::npos; }; if (auto properties = device["PROPERTIES"]) { for (const auto &property_node : properties) { vector<string> property_names; if (property_node.IsScalar()) property_names.push_back(property_node.as<string>()); else property_names = property_node.as<vector<string>>(); vector<int> properties; for (const auto &property_name : property_names) { int property = is_int(property_name) ? stoi(property_name) : libevdev_property_from_name( property_name.c_str()); if (property < 0) throw invalid_argument("invalid EVENT CODE: " + property_name); properties.push_back(property); } this->properties.push_back(std::move(properties)); } } if (auto events = device["EVENTS"]) { for (const auto &event : events) { auto event_type_name = event.first.as<string>(); int event_type = is_int(event_type_name) ? stoi(event_type_name) : libevdev_event_type_from_name( event_type_name.c_str()); if (event_type < 0) throw invalid_argument("invalid EVENT TYPE: " + event_type_name); this->events[event_type] = {}; for (const auto &event_code_node : event.second) { vector<string> event_code_names; if (event_code_node.IsScalar()) event_code_names.push_back( event_code_node.as<string>()); else event_code_names = event_code_node.as<vector<string>>(); vector<int> event_codes; for (const auto &event_code_name : event_code_names) { int event_code = is_int(event_code_name) ? stoi(event_code_name) : libevdev_event_code_from_name( event_type, event_code_name.c_str()); if (event_code < 0) throw invalid_argument("invalid EVENT CODE: " + event_code_name); event_codes.push_back(event_code); } this->events[event_type].push_back(std::move(event_codes)); } } } } bool matches(udev_device *u, libevdev *e) const { using std::pair; using std::all_of; using std::any_of; using std::vector; using std::none_of; using std::to_string; using std::regex_match; if (has_link) { udev_list_entry *dev_list_entry; udev_list_entry_foreach(dev_list_entry, udev_device_get_devlinks_list_entry(u)) { if (regex_match(udev_list_entry_get_name(dev_list_entry), link)) goto next; } return false; } next: auto empty_if_null = [](const char *s) { return s ? s : ""; }; if (!regex_match(empty_if_null(libevdev_get_name(e)), name)) return false; if (!regex_match(empty_if_null(libevdev_get_phys(e)), location)) return false; if (!regex_match(empty_if_null(libevdev_get_uniq(e)), id)) return false; if (!regex_match(to_string(libevdev_get_id_product(e)), product) || !regex_match(to_string(libevdev_get_id_vendor(e)), vendor) || !regex_match(to_string(libevdev_get_id_bustype(e)), bustype) || !regex_match(to_string(libevdev_get_driver_version(e)), driver_version)) return false; if (!properties.empty() && none_of(properties.begin(), properties.end(), [e](const vector<int> &property) { return all_of(property.begin(), property.end(), [e](int property) { return libevdev_has_property( e, property); }); })) return false; return all_of( events.begin(), events.end(), [e](const pair<int, vector<vector<int>>> &event) { return libevdev_has_event_type(e, event.first) && (event.second.empty() || any_of(event.second.begin(), event.second.end(), [e, &event](const vector<int> &event_codes) { return all_of( event_codes.begin(), event_codes.end(), [e, &event](int event_code) { return libevdev_has_event_code( e, event.first, event_code); }); })); }); } std::vector<pid_t> launch_for(const std::string &devnode) const { std::vector<pid_t> pids; for (size_t i = 0; i < cmds.size(); ++i) { pid_t pid = fork(); switch (pid) { case -1: std::fprintf(stderr, R"(fork failed for devnode %s, job "%s" )" R"(with error "%s")" "\n", devnode.c_str(), cmds[i].back().c_str(), std::strerror(errno)); break; case 0: { std::unique_ptr<char *[]> command { new char *[cmds[i].size() + 1] }; for (size_t j = 0; j < cmds[i].size(); ++j) command[j] = const_cast<char *>(cmds[i][j].c_str()); command[cmds[i].size()] = nullptr; std::string variables = "DEVNODE=" + devnode; char *environment[] = { const_cast<char *>(variables.c_str()), nullptr}; setpgid(0, 0); execvpe(command[0], command.get(), environment); std::string e = "exec failed for devnode "; e.append(devnode); e.append(", job \""); e.append(cmds[i].back()); e.append("\" with error \""); e.append(std::strerror(errno)); e.append("\""); throw std::runtime_error(e); } break; default: pids.push_back(pid); break; } } return pids; } std::vector<std::vector<std::string>> cmds; // clang-format off bool has_link {false}; std::regex link; std::regex name {".*", std::regex::optimize}; std::regex location {".*", std::regex::optimize}; std::regex id {".*", std::regex::optimize}; std::regex product {".*", std::regex::optimize}; std::regex vendor {".*", std::regex::optimize}; std::regex bustype {".*", std::regex::optimize}; std::regex driver_version {".*", std::regex::optimize}; // clang-format on std::vector<std::vector<int>> properties; std::map<int, std::vector<std::vector<int>>> events; }; struct jobs_manager { jobs_manager(const std::vector<yaml> &configs) { using std::invalid_argument; for (const auto &config : configs) switch (config.size()) { case 1: if (!config[0].IsSequence()) throw invalid_argument( "configuration must contain a job node's sequence " "document"); for (const auto &job_node : config[0]) if (job_node["JOB"] && job_node.size() == 2) jobs.emplace_back(job_node); else cmds.emplace_back(job_node); break; case 2: if (config[0].IsSequence() == config[1].IsSequence()) throw invalid_argument( "configuration must contain one job node's " "sequence document"); size_t settings, sequence; if (config[0].IsSequence()) settings = 1, sequence = 0; else settings = 0, sequence = 1; for (const auto &job_node : config[sequence]) if (job_node["JOB"] && job_node.size() == 2) jobs.emplace_back(job_node, config[settings]); else cmds.emplace_back(job_node, config[settings]); break; default: throw invalid_argument( "unexpected number of documents in configuration"); break; } } void launch() { for (const auto &cmd : cmds) for (auto pid : cmd.launch()) running_cmds.push_back(pid); } void launch_for(udev_device *u) { const char virtual_devices_directory[] = "/sys/devices/virtual/input/"; if (strncmp(udev_device_get_syspath(u), virtual_devices_directory, sizeof(virtual_devices_directory) - 1) == 0) return; const char input_prefix[] = "/dev/input/event"; const char *devnode = udev_device_get_devnode(u); if (!devnode || std::strncmp(devnode, input_prefix, sizeof(input_prefix) - 1)) return; int fd = open(devnode, O_RDONLY); if (fd < 0) { std::fprintf(stderr, R"(failed to open %s with error "%s")" "\n", devnode, std::strerror(errno)); return; } struct defer1 { int fd; ~defer1() { close(fd); } } defer1{fd}; libevdev *e; if (libevdev_new_from_fd(fd, &e) < 0) { std::fprintf( stderr, R"(failed to create evdev device for %s with error "%s")" "\n", devnode, std::strerror(errno)); return; } struct defer2 { libevdev *e; ~defer2() { libevdev_free(e); } } defer2{e}; for (const auto &job : jobs) if (job.matches(u, e)) { auto pids = running_jobs.find(devnode); if (pids == running_jobs.end()) { auto new_pids = job.launch_for(devnode); if (!new_pids.empty()) running_jobs[devnode] = new_pids; } break; } } void manage(udev_device *u) { const char virtual_devices_directory[] = "/sys/devices/virtual/input/"; if (strncmp(udev_device_get_syspath(u), virtual_devices_directory, sizeof(virtual_devices_directory) - 1) == 0) return; const char input_prefix[] = "/dev/input/event"; const char *devnode = udev_device_get_devnode(u); if (!devnode || std::strncmp(devnode, input_prefix, sizeof(input_prefix) - 1)) return; const char *action = udev_device_get_action(u); if (!action) return; if (!std::strcmp(action, "add")) { int fd = open(devnode, O_RDONLY); if (fd < 0) { std::fprintf(stderr, R"(failed to open %s with error "%s")" "\n", devnode, std::strerror(errno)); return; } struct defer1 { int fd; ~defer1() { close(fd); } } defer1{fd}; libevdev *e; if (libevdev_new_from_fd(fd, &e) < 0) { std::fprintf( stderr, R"(failed to create evdev device for %s with error "%s")" "\n", devnode, std::strerror(errno)); return; } struct defer2 { libevdev *e; ~defer2() { libevdev_free(e); } } defer2{e}; for (const auto &job : jobs) if (job.matches(u, e)) { auto pids = running_jobs.find(devnode); if (pids == running_jobs.end()) { auto new_pids = job.launch_for(devnode); if (!new_pids.empty()) running_jobs[devnode] = new_pids; } break; } } else if (!std::strcmp(action, "remove")) { auto pids = running_jobs.find(devnode); if (pids != running_jobs.end()) { for (auto pid : pids->second) kill(-pid, SIGTERM); running_jobs.erase(pids); } } } ~jobs_manager() { for (auto pid : running_cmds) kill(-pid, SIGTERM); for (const auto &running_job : running_jobs) for (auto pid : running_job.second) kill(-pid, SIGTERM); } std::vector<cmd> cmds; std::vector<job> jobs; std::vector<pid_t> running_cmds; std::map<std::string, std::vector<pid_t>> running_jobs; }; std::vector<yaml> scan_config(const std::string &directory) { static const std::regex yaml_extension{R"(.*\.ya?ml)", std::regex::optimize}; std::vector<yaml> configs; if (DIR *dir = opendir(directory.c_str())) while (dirent *entry = readdir(dir)) if ((entry->d_type == DT_REG || entry->d_type == DT_LNK) && regex_match(entry->d_name, yaml_extension)) configs.push_back( YAML::LoadAllFromFile(directory + '/' + entry->d_name)); return configs; } void kill_zombies(int /*signum*/) { int status; while (waitpid(-1, &status, WNOHANG) > 0) ; } volatile sig_atomic_t quit = false; void set_quit_handler(int /*signal*/) { quit = true; } int main(int argc, char *argv[]) try { using std::perror; std::regex default_config("/etc/interception/udevmon.ya?ml"); std::vector<yaml> configs = scan_config("/etc/interception/udevmon.d"); if (configs.size() > 0) printf( "%zu configuration files read from /etc/interception/udevmon.d\n", configs.size()); for (int opt; (opt = getopt(argc, argv, "hc:")) != -1;) { switch (opt) { case 'h': return print_usage(stdout, argv[0]), EXIT_SUCCESS; case 'c': try { configs.push_back(YAML::LoadAllFromFile(optarg)); } catch (const YAML::BadFile &e) { if (std::regex_match(optarg, default_config) && configs.size() > 0) continue; printf("ignoring %s, reason: %s\n", optarg, e.msg.c_str()); } continue; } return print_usage(stderr, argv[0]), EXIT_FAILURE; } if (configs.empty()) return perror("couldn't read any configuration"), EXIT_FAILURE; jobs_manager jobs(configs); struct sigaction sa {}; sa.sa_flags = SA_NOCLDSTOP; sa.sa_handler = &kill_zombies; if (sigaction(SIGCHLD, &sa, nullptr) == -1) return perror("couldn't summon zombie killer"), EXIT_FAILURE; sa.sa_flags = 0; sigemptyset(&sa.sa_mask); sa.sa_handler = &set_quit_handler; if (sigaction(SIGINT, &sa, nullptr) == -1) return perror("couldn't register SIGINT signal handler"), EXIT_FAILURE; if (sigaction(SIGTERM, &sa, nullptr) == -1) return perror("couldn't register SIGTERM signal handler"), EXIT_FAILURE; jobs.launch(); udev *udev = udev_new(); if (!udev) return perror("can't create udev"), EXIT_FAILURE; struct defer { struct udev *udev; ~defer() { udev_unref(udev); } } defer{udev}; { udev_enumerate *enumerate = udev_enumerate_new(udev); struct defer { udev_enumerate *enumerate; ~defer() { udev_enumerate_unref(enumerate); } } defer{enumerate}; udev_enumerate_add_match_subsystem(enumerate, "input"); udev_enumerate_scan_devices(enumerate); udev_list_entry *dev_list_entry; udev_list_entry_foreach(dev_list_entry, udev_enumerate_get_list_entry(enumerate)) { if (udev_device *u = udev_device_new_from_syspath( udev, udev_list_entry_get_name(dev_list_entry))) { struct defer { udev_device *u; ~defer() { udev_device_unref(u); } } defer{u}; jobs.launch_for(u); } } } { udev_monitor *monitor = udev_monitor_new_from_netlink(udev, "udev"); if (!monitor) return perror("can't create monitor"), EXIT_FAILURE; struct defer { udev_monitor *monitor; ~defer() { udev_monitor_unref(monitor); } } defer{monitor}; udev_monitor_filter_add_match_subsystem_devtype(monitor, "input", nullptr); udev_monitor_enable_receiving(monitor); int fd = udev_monitor_get_fd(monitor); while (!quit) { fd_set fds; FD_ZERO(&fds); FD_SET(fd, &fds); if (select(fd + 1, &fds, nullptr, nullptr, nullptr) > 0 && FD_ISSET(fd, &fds)) { if (udev_device *u = udev_monitor_receive_device(monitor)) { struct defer { udev_device *u; ~defer() { udev_device_unref(u); } } defer{u}; jobs.manage(u); } } } } } catch (const std::exception &e) { return std::fprintf(stderr, R"(an exception occurred: "%s")" "\n", e.what()), EXIT_FAILURE; } 07070100000009000081A4000000000000000000000001619A3A03000000E6000000000000000000000000000000000000001900000000tools-0.6.8/udevmon.init#!/sbin/openrc-run depend() { want udev-settle after udev-settle } command=/usr/bin/udevmon command_args='-c /etc/interception/udevmon.yaml' start_stop_daemon_args='-N -20' pidfile=/var/run/udevmon.pid command_background=true 0707010000000A000081A4000000000000000000000001619A3A030000013A000000000000000000000000000000000000001C00000000tools-0.6.8/udevmon.service[Unit] Description=Monitor input devices for launching tasks Wants=systemd-udev-settle.service After=systemd-udev-settle.service Documentation=man:udev(7) [Service] ExecStart=/usr/bin/udevmon -c /etc/interception/udevmon.yaml Nice=-20 Restart=on-failure OOMScoreAdjust=-1000 [Install] WantedBy=multi-user.target 0707010000000B000081A4000000000000000000000001619A3A0300004AF8000000000000000000000000000000000000001700000000tools-0.6.8/uinput.cpp#include <map> #include <cstdio> #include <string> #include <vector> #include <cstdlib> #include <algorithm> #include <stdexcept> extern "C" { #include <fcntl.h> #include <unistd.h> } #include <yaml-cpp/yaml.h> #include <libevdev/libevdev-uinput.h> std::map<int, std::string> bus_string = { #ifdef BUS_PCI {BUS_PCI, "BUS_PCI"}, #endif #ifdef BUS_ISAPNP {BUS_ISAPNP, "BUS_ISAPNP"}, #endif #ifdef BUS_USB {BUS_USB, "BUS_USB"}, #endif #ifdef BUS_HIL {BUS_HIL, "BUS_HIL"}, #endif #ifdef BUS_BLUETOOTH {BUS_BLUETOOTH, "BUS_BLUETOOTH"}, #endif #ifdef BUS_VIRTUAL {BUS_VIRTUAL, "BUS_VIRTUAL"}, #endif #ifdef BUS_ISA {BUS_ISA, "BUS_ISA"}, #endif #ifdef BUS_I8042 {BUS_I8042, "BUS_I8042"}, #endif #ifdef BUS_XTKBD {BUS_XTKBD, "BUS_XTKBD"}, #endif #ifdef BUS_RS232 {BUS_RS232, "BUS_RS232"}, #endif #ifdef BUS_GAMEPORT {BUS_GAMEPORT, "BUS_GAMEPORT"}, #endif #ifdef BUS_PARPORT {BUS_PARPORT, "BUS_PARPORT"}, #endif #ifdef BUS_AMIGA {BUS_AMIGA, "BUS_AMIGA"}, #endif #ifdef BUS_ADB {BUS_ADB, "BUS_ADB"}, #endif #ifdef BUS_I2C {BUS_I2C, "BUS_I2C"}, #endif #ifdef BUS_HOST {BUS_HOST, "BUS_HOST"}, #endif #ifdef BUS_GSC {BUS_GSC, "BUS_GSC"}, #endif #ifdef BUS_ATARI {BUS_ATARI, "BUS_ATARI"}, #endif #ifdef BUS_SPI {BUS_SPI, "BUS_SPI"}, #endif #ifdef BUS_RMI {BUS_RMI, "BUS_RMI"}, #endif #ifdef BUS_CEC {BUS_CEC, "BUS_CEC"}, #endif #ifdef BUS_INTEL_ISHTP {BUS_INTEL_ISHTP, "BUS_INTEL_ISHTP"}, #endif }; std::map<std::string, int> string_bus = { #ifdef BUS_PCI {"BUS_PCI", BUS_PCI}, #endif #ifdef BUS_ISAPNP {"BUS_ISAPNP", BUS_ISAPNP}, #endif #ifdef BUS_USB {"BUS_USB", BUS_USB}, #endif #ifdef BUS_HIL {"BUS_HIL", BUS_HIL}, #endif #ifdef BUS_BLUETOOTH {"BUS_BLUETOOTH", BUS_BLUETOOTH}, #endif #ifdef BUS_VIRTUAL {"BUS_VIRTUAL", BUS_VIRTUAL}, #endif #ifdef BUS_ISA {"BUS_ISA", BUS_ISA}, #endif #ifdef BUS_I8042 {"BUS_I8042", BUS_I8042}, #endif #ifdef BUS_XTKBD {"BUS_XTKBD", BUS_XTKBD}, #endif #ifdef BUS_RS232 {"BUS_RS232", BUS_RS232}, #endif #ifdef BUS_GAMEPORT {"BUS_GAMEPORT", BUS_GAMEPORT}, #endif #ifdef BUS_PARPORT {"BUS_PARPORT", BUS_PARPORT}, #endif #ifdef BUS_AMIGA {"BUS_AMIGA", BUS_AMIGA}, #endif #ifdef BUS_ADB {"BUS_ADB", BUS_ADB}, #endif #ifdef BUS_I2C {"BUS_I2C", BUS_I2C}, #endif #ifdef BUS_HOST {"BUS_HOST", BUS_HOST}, #endif #ifdef BUS_GSC {"BUS_GSC", BUS_GSC}, #endif #ifdef BUS_ATARI {"BUS_ATARI", BUS_ATARI}, #endif #ifdef BUS_SPI {"BUS_SPI", BUS_SPI}, #endif #ifdef BUS_RMI {"BUS_RMI", BUS_RMI}, #endif #ifdef BUS_CEC {"BUS_CEC", BUS_CEC}, #endif #ifdef BUS_INTEL_ISHTP {"BUS_INTEL_ISHTP", BUS_INTEL_ISHTP}, #endif }; void print_usage(std::FILE *stream, const char *program) { // clang-format off std::fprintf(stream, "uinput - redirect device input events from stdin to virtual device\n" "\n" "usage: %s [-h | [-p] [-c device.yaml] [-d devnode]]\n" "\n" "options:\n" " -h show this message and exit\n" " -p show resulting YAML device description merge and exit\n" " -c device.yaml merge YAML device description to resulting virtual\n" " device (repeatable)\n" " -d devnode merge reference device description to resulting virtual\n" " device (repeatable)\n", program); // clang-format on } bool is_int(const std::string &s) { return s.find_first_not_of("0123456789") == std::string::npos; } using block_type = unsigned long; constexpr int block_size = sizeof(block_type) * 8; constexpr int blocks_needed(int n_bits) { return (n_bits - 1) / block_size + 1; } bool bit(const block_type buffer[], int bit_index) { return buffer[bit_index / block_size] & (block_type{1} << (bit_index % block_size)); } std::string yaml_create_from_evdev(libevdev *dev) { using std::map; using std::vector; using std::string; using std::any_of; YAML::Emitter yaml; yaml << YAML::BeginMap; if (auto name = libevdev_get_name(dev)) yaml << YAML::Key << "NAME" << YAML::Value << name; if (auto location = libevdev_get_phys(dev)) yaml << YAML::Key << "LOCATION" << YAML::Value << location; if (auto id = libevdev_get_uniq(dev)) yaml << YAML::Key << "ID" << YAML::Value << id; if (auto product = libevdev_get_id_product(dev)) yaml << YAML::Key << "PRODUCT" << YAML::Value << product; if (auto vendor = libevdev_get_id_vendor(dev)) yaml << YAML::Key << "VENDOR" << YAML::Value << vendor; if (auto bustype = libevdev_get_id_bustype(dev)) { if (bus_string.find(bustype) != bus_string.end()) yaml << YAML::Key << "BUSTYPE" << YAML::Value << bus_string[bustype]; else yaml << YAML::Key << "BUSTYPE" << YAML::Value << bustype; } if (auto driver_version = libevdev_get_driver_version(dev)) yaml << YAML::Key << "DRIVER_VERSION" << YAML::Value << driver_version; vector<string> properties; if (libevdev_has_property(dev, INPUT_PROP_POINTER)) properties.push_back("INPUT_PROP_POINTER"); if (libevdev_has_property(dev, INPUT_PROP_DIRECT)) properties.push_back("INPUT_PROP_DIRECT"); if (libevdev_has_property(dev, INPUT_PROP_BUTTONPAD)) properties.push_back("INPUT_PROP_BUTTONPAD"); if (libevdev_has_property(dev, INPUT_PROP_SEMI_MT)) properties.push_back("INPUT_PROP_SEMI_MT"); if (libevdev_has_property(dev, INPUT_PROP_TOPBUTTONPAD)) properties.push_back("INPUT_PROP_TOPBUTTONPAD"); if (libevdev_has_property(dev, INPUT_PROP_POINTING_STICK)) properties.push_back("INPUT_PROP_POINTING_STICK"); if (libevdev_has_property(dev, INPUT_PROP_ACCELEROMETER)) properties.push_back("INPUT_PROP_ACCELEROMETER"); if (!properties.empty()) yaml << YAML::Key << "PROPERTIES" << YAML::Value << properties; int fd = libevdev_get_fd(dev); block_type type_mask[blocks_needed(EV_MAX)] = {}; block_type event_mask[blocks_needed(KEY_MAX)] = {}; if (ioctl(fd, EVIOCGBIT(0, EV_MAX), type_mask) != -1 && any_of(type_mask, type_mask + blocks_needed(EV_MAX), [](block_type block) { return block != block_type{}; })) { yaml << YAML::Key << "EVENTS" << YAML::Value; yaml << YAML::BeginMap; for (int type_code = 0; type_code <= EV_MAX; ++type_code) { if (!bit(type_mask, type_code)) continue; int event_max = libevdev_event_type_get_max(type_code); const char *type_name = libevdev_event_type_get_name(type_code); yaml << YAML::Key; if (type_name) yaml << libevdev_event_type_get_name(type_code); else yaml << type_code; yaml << YAML::Value; switch (type_code) { case EV_SYN: yaml << YAML::Flow << YAML::BeginSeq; if (libevdev_has_event_code(dev, EV_SYN, SYN_REPORT)) yaml << "SYN_REPORT"; if (libevdev_has_event_code(dev, EV_SYN, SYN_CONFIG)) yaml << "SYN_CONFIG"; if (libevdev_has_event_code(dev, EV_SYN, SYN_MT_REPORT)) yaml << "SYN_MT_REPORT"; if (libevdev_has_event_code(dev, EV_SYN, SYN_DROPPED)) yaml << "SYN_DROPPED"; yaml << YAML::EndSeq; break; case EV_REP: { int delay, period; libevdev_get_repeat(dev, &delay, &period); yaml << YAML::BeginMap; yaml << YAML::Key << "REP_DELAY" << YAML::Value << delay; yaml << YAML::Key << "REP_PERIOD" << YAML::Value << period; yaml << YAML::EndMap; } break; case EV_ABS: if (ioctl(fd, EVIOCGBIT(type_code, event_max), event_mask) != -1) { yaml << YAML::BeginMap; for (int event_code = 0; event_code <= event_max; ++event_code) { if (!bit(event_mask, event_code)) continue; if (auto absinfo = libevdev_get_abs_info(dev, event_code)) { if (auto event_name = libevdev_event_code_get_name( type_code, event_code)) yaml << YAML::Key << event_name << YAML::Value; else yaml << YAML::Key << event_code << YAML::Value; yaml << YAML::BeginMap; yaml << YAML::Key << "VALUE" << YAML::Value << absinfo->value; yaml << YAML::Key << "MIN" << YAML::Value << absinfo->minimum; yaml << YAML::Key << "MAX" << YAML::Value << absinfo->maximum; if (absinfo->flat > 0) yaml << YAML::Key << "FLAT" << YAML::Value << absinfo->flat; if (absinfo->fuzz > 0) yaml << YAML::Key << "FUZZ" << YAML::Value << absinfo->fuzz; if (absinfo->resolution > 0) yaml << YAML::Key << "RES" << YAML::Value << absinfo->resolution; yaml << YAML::EndMap; } } yaml << YAML::EndMap; } break; default: if (ioctl(fd, EVIOCGBIT(type_code, event_max), event_mask) != -1) { yaml << YAML::Flow << YAML::BeginSeq; for (int event_code = 0; event_code <= event_max; ++event_code) { if (!bit(event_mask, event_code)) continue; if (auto event_name = libevdev_event_code_get_name( type_code, event_code)) yaml << event_name; else yaml << event_code; } yaml << YAML::EndSeq; } break; } } yaml << YAML::EndMap; } yaml << YAML::EndMap; return yaml.c_str(); } libevdev *evdev_create_from_yaml(const std::vector<YAML::Node> &configs) { using std::map; using std::stoi; using std::vector; using std::string; libevdev *dev = libevdev_new(); for (const auto &config : configs) { if (auto name = config["NAME"]) libevdev_set_name(dev, name.as<string>().c_str()); if (auto id = config["ID"]) libevdev_set_uniq(dev, id.as<string>().c_str()); if (auto product = config["PRODUCT"]) libevdev_set_id_product(dev, product.as<int>()); if (auto vendor = config["VENDOR"]) libevdev_set_id_vendor(dev, vendor.as<int>()); if (auto bustype = config["BUSTYPE"]) libevdev_set_id_bustype(dev, string_bus[bustype.as<string>()]); if (auto version = config["VERSION"]) libevdev_set_id_version(dev, version.as<int>()); if (auto property = config["PROPERTIES"]) for (auto it = property.begin(); it != property.end(); ++it) { auto property = libevdev_property_from_name(it->as<string>().c_str()); if (property != -1) libevdev_enable_property(dev, property); } if (auto event_types = config["EVENTS"]) { for (const auto &event_type : event_types) { auto event_type_string = event_type.first.as<string>(); if (event_type_string == "EV_REP") { if (auto rep_delay = event_type.second["REP_DELAY"]) { auto rep_delay_value = rep_delay.as<int>(); libevdev_enable_event_code(dev, EV_REP, REP_DELAY, &rep_delay_value); } if (auto rep_period = event_type.second["REP_PERIOD"]) { auto rep_period_value = rep_period.as<int>(); libevdev_enable_event_code(dev, EV_REP, REP_PERIOD, &rep_period_value); } } else if (event_type_string == "EV_ABS") { for (const auto &axis : event_type.second) { input_absinfo absinfo = {}; if (auto axis_value = axis.second["VALUE"]) absinfo.value = axis_value.as<int>(); if (auto axis_min = axis.second["MIN"]) absinfo.minimum = axis_min.as<int>(); if (auto axis_max = axis.second["MAX"]) absinfo.maximum = axis_max.as<int>(); if (auto axis_flat = axis.second["FLAT"]) absinfo.flat = axis_flat.as<int>(); if (auto fuzz = axis.second["FUZZ"]) absinfo.fuzz = fuzz.as<int>(); if (auto res = axis.second["RES"]) absinfo.resolution = res.as<int>(); if (!axis.second["VALUE"] && axis.second["MAX"]) absinfo.value = absinfo.maximum; if (!axis.second["VALUE"] && axis.second["MIN"]) absinfo.value = absinfo.minimum; auto axis_code = libevdev_event_code_from_name( EV_ABS, axis.first.as<string>().c_str()); if (axis_code != -1) libevdev_enable_event_code(dev, EV_ABS, axis_code, &absinfo); } } else { auto event_type_code = libevdev_event_type_from_name( event_type_string.c_str()); for (const auto &event : event_type.second) { auto event_string = event.as<string>(); if (is_int(event_string)) libevdev_enable_event_code(dev, event_type_code, stoi(event_string), nullptr); else { auto event_code = libevdev_event_code_from_name( event_type_code, event_string.c_str()); if (event_code != -1) libevdev_enable_event_code(dev, event_type_code, event_code, nullptr); } } } } } } return dev; } int main(int argc, char *argv[]) try { using std::perror; std::vector<YAML::Node> configs; bool print = false; for (int opt; (opt = getopt(argc, argv, "hc:d:p")) != -1;) { switch (opt) { case 'h': return print_usage(stdout, argv[0]), EXIT_SUCCESS; case 'c': configs.push_back(YAML::LoadFile(optarg)); continue; case 'd': { int fd = open(optarg, O_RDONLY); if (fd < 0) return perror("open failed"), EXIT_FAILURE; struct defer1 { int fd; ~defer1() { close(fd); } } defer1{fd}; libevdev *dev; if (libevdev_new_from_fd(fd, &dev) < 0) return perror("libevdev_new_from_fd failed"), EXIT_FAILURE; struct defer2 { libevdev *dev; ~defer2() { libevdev_free(dev); } } defer2{dev}; configs.push_back(YAML::Load(yaml_create_from_evdev(dev))); continue; } case 'p': if (print) break; print = true; continue; } return print_usage(stderr, argv[0]), EXIT_FAILURE; } if (configs.empty()) return print_usage(stderr, argv[0]), EXIT_FAILURE; libevdev *dev = evdev_create_from_yaml(configs); struct defer1 { libevdev *dev; ~defer1() { libevdev_free(dev); } } defer1{dev}; libevdev_uinput *uidev; if (libevdev_uinput_create_from_device(dev, LIBEVDEV_UINPUT_OPEN_MANAGED, &uidev) < 0) return perror("libevdev_uinput_create_from_device failed"), EXIT_FAILURE; struct defer2 { libevdev_uinput *uidev; ~defer2() { libevdev_uinput_destroy(uidev); } } defer2{uidev}; if (print) { int fd = open(libevdev_uinput_get_devnode(uidev), O_RDONLY); if (fd < 0) return perror("open failed"), EXIT_FAILURE; struct defer1 { int fd; ~defer1() { close(fd); } } defer1{fd}; libevdev *dev; if (libevdev_new_from_fd(fd, &dev) < 0) return perror("libevdev_new_from_fd failed"), EXIT_FAILURE; struct defer2 { libevdev *dev; ~defer2() { libevdev_free(dev); } } defer2{dev}; return puts(yaml_create_from_evdev(dev).c_str()), EXIT_SUCCESS; } std::setbuf(stdin, nullptr); input_event input; while (fread(&input, sizeof input, 1, stdin) == 1) if (libevdev_uinput_write_event(uidev, input.type, input.code, input.value) < 0) return perror("libevdev_uinput_write_event failed"), EXIT_FAILURE; } catch (const std::exception &e) { return std::fprintf(stderr, R"(an exception occurred: "%s")" "\n", e.what()), EXIT_FAILURE; } 07070100000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000B00000000TRAILER!!!234 blocks
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