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2020-12-02xwayland: add -core to flagsSimon Ser
Xwayland has its own special handling for signals like SIGSEGV/SIGABRT. Instead of leaving the job to the OS, it tries to walk up the call stack (badly, because a lot of information is missing), print the stack trace to stdout, then exit(1). This is very annoying because it prevents Xwayland crashes from being easily debugged. Xwayland has a flag "-core" that aborts instead of exiting. This allows the OS to generate a coredump. It's far from perfect but better than nothing, I guess.
2020-11-30xwm: add wlr_xwayland_surface_restack()Ilia Bozhinov
2020-11-03xwayland: log unhandled NET_WM_STATE property changesSimon Ser
2020-11-03xwayland: minor code style fixesSimon Ser
2020-10-20xwayland: fix minor typo in debug logTudor Brindus
This accidentally slipped through 1b0e4c7.
2020-10-14xwayland: add set_geometry eventIlia Bozhinov
This is necessary to react to changes in position of override-redirect views.
2020-10-13xwayland: notify requestor when we fail to respond to their requestTudor Brindus
We already mostly did this, but there were a couple of branches (`calloc` failures) where we'd bail without letting the other side know. Refs swaywm/sway#4007. Likely not going to be a real improvement there (if `calloc` fails you're already pretty screwed), but it does address a theoretical possibility.
2020-10-12xwayland: remove stale transfers from the same requestorTudor Brindus
It seems that if we ever try to reply to a selection request after another has been sent by the same requestor (we reply in FIFO order), the requestor never reads from it, and we end up stalling forever on a transfer that will never complete. It appears that `XCB_SELECTION_REQUEST` has some sort of singleton semantics, and new requests for the same selection are meant to replace outstanding older ones. I couldn't find a reference for this, but empirically this does seem to be the case. Real (contrived) case where we don't currently do this, and things break: * run fcitx * run Slack * wl-copy < <(base64 /opt/firefox/libxul.so) # or some other large file * focus Slack (no need to paste) fcitx will send in an `XCB_SELECTION_REQUEST`, and we'll start processing it. Immediately after, Slack sends its own. fcitx hangs for a long, long time. In the meantime, Slack retries and sends another selection request. We now have two pending requests from Slack. Eventually fcitx gives up (or it can be `pkill`'d), and we start processing the first request Slack gave us (FIFO). Slack (Electron?) isn't listening on the other end anymore, and this transfer never completes. The X11 clipboard becomes unusable until Slack is killed. After this patch, the clipboard is immediately usable again after fcitx bails. Also added a bunch of debug-level logging that makes diagnosing this sort of issue easier. Refs swaywm/sway#4007.
2020-10-11xwayland: introduce WLR_XWAYLAND for specifying which Xwayland to useTudor Brindus
When debugging Xwayland-related issues, a common first step in debugging has been to ask the reporter to move their real Xwayland to /usr/bin/Xwayland.bin, and create a shell script starting Xwayland with extra arguments under the original /usr/bin/Xwayland location. Introducing a `WLR_XWAYLAND` environment variable makes this less invasive, by allowing the user to swap out Xwayland without resorting to global system changes (or source patches).
2020-10-11xwayland: fix use-after-free in selection handlingTudor Brindus
Fixes #2425. wlroots can only handle one outgoing transfer at a time, so it keeps a list of pending selections. The head of the list is the currently-active selection, and when that transfer completes and is destroyed, the next one is started. The trouble is when you have a transfer to some app that is misbehaving. fcitx is one such application. With really large transfers, fcitx will hang and never wake up again. So, you can end up with a transfer list that looks like this: | T1: started | T2: pending | T3: pending | T4: pending | The file descriptor for transfer T1 is registered in libwayland's epoll loop. The rest are waiting in wlroots' list. As a user, you want your clipboard back, so you `pkill fcitx`. Now Xwayland sends `XCB_DESTROY_NOTIFY` to let us know to give up. We clean up T4 first. Due to a bug in wlroots code, we register the (fd, transfer data pointer) pair for T1 with libwayland *again*, despite it already being registered. We do this 2 more times as we remove T3 and T2. Finally, we remove T1 and `free` all the memory associated with it, before `close`-ing its transfer file descriptor. However, we still have 3 copies of T1's file descriptor left in the epoll loop, since we erroneously added them as part of removing T2/3/4. When we `close` the file descriptor as part of T1's teardown, we actually cause the epoll loop to wake up the next time around, saying "this file descriptor has activity!" (it was closed, so `read`-ing would normally return 0 to let us know of EOF). But instead of returning 0, it returns -1 with `EBADF`, because the file descriptor has already been closed. And finally, as part of error-handling this, we access the transfer pointer, which was `free`'d. And we crash.
2020-10-11xwayland: using %m in `wlr_log` is broken, use `wlr_log_errno` insteadTudor Brindus
This one was awful to track down, but calls to `wlr_log` with %m have the errno masked by the `isatty` call in `log_stderr`. Switch them to `wlr_log_errno` instead. Cue quality "how can read(2) POSSIBLY be returning ENOTTY?" moments.
2020-10-08xwm: add loop detection for read_surface_parentRouven Czerwinski
Implement a simple loop detection while trying to retrieve the parent for a TRANSIENT_FOR window. Fixes swaywm/sway#4624
2020-09-04xwayland: disconnect display destroy listener even if xwayland didn't initializeIlia Bozhinov
2020-07-30xwayland: do not allow apps to change focus after wlroots requestIlia Bozhinov
2020-07-27xwm: Set _NET_WM_STATE_FOCUSED property for the focused surfaceScott Moreau
Certain clients require this property to be set for expected behavior. Most notably, steam client CSD maximize button no longer worked after unmaximizing once, unless the state was changed by another method. The state is unset whenever another surface gains focus.
2020-07-27xwayland: free server in error pathAntonin Décimo
2020-07-27Fix incorrect format parametersAntonin Décimo
2020-07-22xwayland/xwm: use initializer for props in xsurface_set_wm_stateSimon Ser
This avoids uninitialized items and makes it clear where the magic number 2 is coming from.
2020-07-22xwayland/xwm: add prop count assert in xsurface_set_net_wm_stateSimon Ser
This helps mitigate buffer overflows.
2020-07-22xwayland/xwm: don't insert surface in list on errorSimon Ser
In case wl_event_loop_add_timer errors out, don't insert the free'd wlr_xwayland_surface in the list. Closes: https://github.com/swaywm/wlroots/issues/1721
2020-07-21xwm: add support for xwayland minimizeTobias Langendorf
2020-07-03xwm: end transfers when the requestor is destroyedJohn Chadwick
This improves the failure cases when incremental transfers fail to complete successfully for one reason or another.
2020-06-30xwm: Destroy xwm on hangup or errorScott Moreau
If Xwayland is restarted, the ready handler assumes there is no xwm instance. This means all of xwm was leaked on Xwayland restart. This caused compositors to consume all cpu resources, where time is spent dispatching. Now we destroy xwm if we get an event mask containing WL_EVENT_HANGUP or WL_EVENT_ERROR.
2020-06-30xwayland: Don't discard ready signalsScott Moreau
The xwayland ready signals are used to do initial setup like starting xwm. Discarding the signals means that the handler functions will not be called in the case that Xwayland is restarted and thus, xwm managed clients fail. Fixes #2174."
2020-05-27xwayland: add error-checking to `server_start_lazy`Tudor Brindus
This prevents a very unlikely crash in `xwayland_socket_connected`. Refs #2163.
2020-05-25xwayland: send focus change event unconditionallyTudor Brindus
This fixes issues with (at least) dialogs in Jetbrains IDEs becoming unclickable if they ever lost focus (ref. swaywm/sway#5373). Prior to this change, since `xwm->focus_surface` would be set prior to `xwm_surface_activate` being called, the latter would short-circuit immediately and not notify the application of the focus change.
2020-05-19xwayland: add option to disable WMSimon Ser
2020-05-19xwayland: split serverSimon Ser
Split the server part of wlr_xwayland into wlr_xwayland_server. This allows compositors to implement their own XWM when wlroots' isn't a good fit.
2020-03-06xwayland: remove underscore prefix from atom namesSimon Ser
Previously, some atoms had a leading underscore, others didn't. Be more consistent and never use a leading underscore (symbols with a leading underscore followed by an upper-case letter are reserved).
2020-03-06xwayland: remove duplicate _NET_WM_NAME entrySimon Ser
2020-03-06xwayland: use explicit indexes when initializing atom_mapSimon Ser
It's very easy to break the mapping between the atom_name enum and the atom_map array. Use explicit indexes to prevent issues.
2020-02-19xwayland: ignore pointer focus changesSimon Ser
This reflects what i3 does [1]. [1]: https://github.com/i3/i3/blob/b3faf9fca9254679a4715486a4de80ebaee70410/src/handlers.c#L1076 Fixes: c067fbc010da ("xwm: allow applications to change focus between their own surfaces") Closes: https://github.com/swaywm/sway/issues/4926
2020-01-05xwm: allow applications to change focus between their own surfacesIlia Bozhinov
Although currently this problem is present in only Steam, and it is actually a client bug.
2019-12-31xwayland: Clean up if Xwayland fails to startScott Moreau
When running wlroots compositors with Xwayland executable bits unset, if DISPLAY is set to the display number wlroots has set up, then X and gtk clients (at least) hang when they are ran. X clients should fail with an error and exit while gtk clients should fall back to wayland backend and run correctly. This is because wlroots opened sockets for Xwayland but wasn't closing them if Xwayland failed to start.
2019-12-23meson: Various improvementsScott Anderson
Bumps minimum version to 0.51.0 - Remove all intermediate static libraries. They serve no purpose and are just add a bunch of boilerplate for managing dependencies and options. It's now managed as a list of files which are compiled into libwlroots directly. - Use install_subdir instead of installing headers individually. I've changed my mind since I did that. Listing them out is annoying as hell, and it's easy to forget to do it. - Add not_found_message for all of our optional dependencies that have a meson option. It gives some hints about what option to pass and what the optional dependency is for. - Move all backend subdirectories into their own meson.build. This keeps some of the backend-specific build logic (especially rdp and session) more neatly separated off. - Don't overlink example clients with code they're not using. This was done by merging the protocol dictionaries and setting some variables containing the code and client header file. Example clients now explicitly mention what extension protocols they want to link to. - Split compositor example logic from client example logic. - Minor formatting changes
2019-10-08xwayland: Expose configure request maskScott Moreau
Without this information, compositors have no way to tell whether or not to consider the position information valid. Most notably, a compositor needs to know if it should pick a position for the surface or use the position sent in the configure request.
2019-08-12xwayland: prevent possible array overrunAntonin Décimo
2019-07-27Remove all wayland-server.h includesSimon Ser
The documentation for wayland-server.h says: > Use of this header file is discouraged. Prefer including > wayland-server-core.h instead, which does not include the server protocol > header and as such only defines the library PI, excluding the deprecated API > below. Replacing wayland-server.h with wayland-server-core.h allows us to drop the WL_HIDE_DEPRECATED declaration.
2019-06-30Implement serial validation for selection requestsManuel Stoeckl
This change tracks, for each wlr_seat_client, the most recent serial numbers which were sent to the client. When the client makes a selection request, wlroots now verifies that the serial number associated with the selection request was actually provided to that specific client. This ensures that the client that was most recently interacted with always has priority for its copy selection requests, and that no other clients can incorrectly use a larger serial value and "steal" the role of having the copy selection. Also, the code used to determine when a given selection is superseded by a newer request uses < instead of <= to allow clients to make multiple selection requests with the same serial number and have the last one hold. To limit memory use, a ring buffer is used to store runs of sequential serial numbers, and all serial numbers earlier than the start of the ring buffer are assumed to be valid. Faking very old serials is unlikely to be disruptive. Assuming all clients are correctly written, the only additional constraint which this patch should impose is that serial numbers are now bound to seats: clients may not receive a serial number from an input event on one seat and then use that to request copy-selection on another seat.
2019-03-06xwayland: set CLOEXEC on /dev/null FDemersion
This avoids leaking the FD to Xwayland and its children.
2019-03-04xwayland: don't set DISPLAYemersion
Let the compositor set it. This allows for multiple Xwayland instances to run at the same time. Fixes https://github.com/swaywm/wlroots/issues/1442
2019-03-04xwm: fix typos in WM_NORMAL_HINTS handlingIlia Bozhinov
2019-03-03xwm: use min size as base size hint if it is missing and vice versaIlia Bozhinov
This is what ICCCM states that a WM should do.
2019-03-01meson: enable more compiler warningsemersion
2019-02-20xwayland: remove remaining SOCK_CLOEXECemersion
2019-02-19xwayland: don't use SOCK_CLOEXECemersion
SOCK_CLOEXEC isn't POSIX.
2019-02-18xwayland, data-device: fix surface state on unmapemersion
This commit makes sure surface->mapped is true when the unmapped event is emitted. This is necessary because listeners can only damage surfaces that are mapped. This is similar to the fact that the destroy event is emitted before any destruction is actually made. Fixes https://github.com/swaywm/sway/issues/3568
2019-02-15xwm: Add _NET_CLIENT_LIST supportUli Schlachter
Fixes: https://github.com/swaywm/wlroots/issues/1469 Signed-off-by: Uli Schlachter <psychon@znc.in>
2019-02-13xwm: stack below on mapBrian Ashworth
Since xwm only manipulates the stack when focusing a window, newly mapped windows should be stacked below the focused window. This prevents the newly mapped window from stealing focus due to being on the top of the stack.
2019-02-05data-device: destroy previous source when starting dragemersion
This supersedes f24e17259e49aef55b7ada54793a4cdb49ae94a1 and 04c9ca4198a729a95a6368bbbf0438d1ba3465fa. These commits were manually removing wlr_data_source destroy handlers when starting a new drag. This is error-prone. Instead, this commit destroys the previous source whenever we start a new drag.
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