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Stop trying to maintain a per-file _POSIX_C_SOURCE. Instead,
require POSIX.1-2008 globally. A lot of core source files depend
on that already.
Some care must be taken on a few select files where we need a bit
more than POSIX. Some files need XSI extensions (_XOPEN_SOURCE) and
some files need BSD extensions (_DEFAULT_SOURCE). In both cases,
these feature test macros imply _POSIX_C_SOURCE. Make sure to not
define both these macros and _POSIX_C_SOURCE explicitly to avoid
POSIX requirement conflicts (e.g. _POSIX_C_SOURCE says POSIX.1-2001
but _XOPEN_SOURCE says POSIX.1-2008).
Additionally, there is one special case in render/vulkan/vulkan.c.
That file needs major()/minor(), and these are system-specific.
On FreeBSD, _POSIX_C_SOURCE hides system-specific symbols so we need
to make sure it's not defined for this file. On Linux, we can
explicitly include <sys/sysmacros.h> and ensure that apart from
symbols defined there the file only uses POSIX toys.
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wl_display holds a lot more than wlr_session needs: wlr_session
only needs to wait for a FD to become readable, but wl_display
provides full access to the Wayland client and protocol objects.
Switch to wl_event_loop to better reflect the above.
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Some compositors are not interested in wlr_session, for instance
nested compositors.
Disabling wlr_session removes the udev dependency.
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Instead of hand-rolling get_current_time_msec(), let's just re-use
the helper we already have in "util/time.h".
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We have no use for these.
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All of these projects use meson.override_dependency() so we can
stop referencing their internal variable name to grab the
depndencies we need.
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This helper is responsible for listening for new DRM devices and
create new child DRM backends as necessary.
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This will allow the DRM backend to reload its lessee list.
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This struct contains additional information for session device
change events, such as the DRM connector ID that has changed.
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Instead of hardcoding the string "card", use DRM_PRIMARY_MINOR_NAME.
Some systems may use another prefix, e.g. OpenBSD uses "drm" instead.
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This moves the magic incantation into libdrm and is clearer. See
[1] for details.
While at it, fixup the doc comment and improve logging.
[1]: https://gitlab.freedesktop.org/mesa/drm/-/commit/523b3658aa8efa746417e916c987de23740ce313
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This was lost in the session_impl removal refactor.
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libseat provides all session functionality, so there is no longer need
for a session backend abstraction. The libseat device ID, seat handle
and event loop handle are moved to the main wlr_session and wlr_device
structs.
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This is instead delegated to libseat.
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This is instead delegated to libseat.
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This is instead delegated to libseat.
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When libseat is built as a subproject, we're not interested in
building the server or the man pages.
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This allows libseat to be compiled as a Meson subproject when it's
not installed system-wide. This can ease development and compilation
on distributions where libseat isn't packaged.
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As explained in [1], user-space should perform a drmModeGetResources
call to figure out whether a device supports KMS.
[1]: https://gitlab.freedesktop.org/mesa/drm/-/merge_requests/127
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This allows us to easily iterate on all features and only deal with
bools.
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This requires a change to the type of `struct wlr_tablet` and
`wlr_tablet_init` signature, both of which are part of the unstable API.
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Sometimes wlr_session_find_gpus will encounter an error. This is
different from finding zero GPUs.
On error, wlr_session_find_gpus already returns -1. However, this is
casted to size_t, so callers uncorrectly assume this is a success.
Instead, make wlr_session_find_gpus return a ssize_t and allow callers
to handle the error accordingly.
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libseat will call logind's SetType method if necessary.
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This should return true on success and false on failure not vice-versa.
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If a GPU doesn't show up in 10s, bail out and return zero GPUs.
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This makes it easier to figure out how wlroots selected the session.
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This is more idiomatic wlroots API. The new name makes it clear that the
signal is emitted when wlr_session.active changes.
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We now use udev to wait for DRM card devices.
This reverts commit 3ebf079a9a120a27fc1008a62e7f99d5d166b745.
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Wait for a DRM device if none is found in wlr_session_find_gpus. This
can happen if the compositor is loaded before the display kernel driver.
This supersedes the logind CanGraphical property.
To test, e.g. with i915 and sway:
rmmod -f i915
sway &
modprobe i915
Closes: https://github.com/swaywm/wlroots/issues/2093
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This is triggered when a new DRM card is added.
An easy way to test this patch is `modprobe vkms`.
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We're only interested in card devices. The loop over wlr_session.devices
would take care of ignoring non-card events, but a future patch will
listen to udev "add" events as well.
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Instead of operating on FDs in {open,close}_device, operate on
wlr_devices. This avoids the device lookup in wlr_session and allows
callers to have access to wlr_device fields.
For now, we use it to remove wlr_session_signal_add and replace it with
a more idiomatic wlr_session.events.change field. In the future, other
events will be added.
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When wlr_session_open_file fails, don't return the FD, otherwise the
caller will think the call succeeded.
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seat0s have TTYs
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When starting a compositor that's using the "direct" session backend,
wlroots needs to handle calls to `drmSetMaster()` and `drmDropMaster()`.
As both calls used to require `CAP_SYS_ADMIN`, wlroots thus simply
refused starting in case the process doesn't enjoy evelated privileges.
Permission rules have changed since linux.git commit 45bc3d26c95a (drm:
rework SET_MASTER and DROP_MASTER perm handling, 2020-03-19). As a
result, starting with Linux v5.8, both ioctls will now also succeed if
the process is currently or has been the DRM master. And as the first
process to open render nodes will become the DRM master automatically,
this effectively means that process elevation is not strictly required
in all setups anymore.
So let's drop the `geteuid() != 0` permission check to allow those new
rules to do their magic.
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(almost certainly due to systemd version <246)
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Route libseat errors through wlroots logging infrastructure.
This requires libseat 0.2.0.
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bad1e9afa8ea ("session: Add libseat backend") introduced a change to to
how session backends initialize, but failed to update the FreeBSD
specific version of the direct backend accordingly.
Closes: https://github.com/swaywm/wlroots/issues/2376
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This is simply a false sense of security, and is worse than just using
setuid. CAP_SYS_ADMIN is an extremely serious capability that is
effectively as powerful as root.
It also required users to be in the input group, which allows any
process to keylog the entire system.
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