Attempting to write anything longer into the embedded char
array would create a non-null-terminated string, and all
later reads would run off the end into invalid memory.
This is a hard limitation of AF_LOCAL/AF_UNIX sockets.
Attempting to write anything longer into the embedded char
array would create a non-null-terminated string, and all
later reads would run off the end into invalid memory.
This is a hard limitation of AF_LOCAL/AF_UNIX sockets.
Always unlink() the lock file before closing the file
descriptor for it. Otherwise, there is a race like this:
Process A closes fd, releasing the lock
Process B opens the same file, taking the lock
Process A unlinks the lock file
Process C opens the same file, which now no longer exists,
and takes the lock on the newly created lock file
Process B and C both 'own' the same display socket.
unlink()ing while holding the lock is effectively a better
way to release the lock atomically.
When the server send a new object ID, the client used to have to allocate
the proxy manually and without type-safety. We now allocate the proxy
in a client-side post-processing step on the incoming closure.
Provide a slot for keyboard modifier state inside wl_keyboard for
implementations to update, and use this to send wl_keyboard:;modifier
events whenever the keyboard or pointer focus changes.
Signed-off-by: Daniel Stone <daniel@fooishbar.org>
If the data source is destroyed, the corresponding offers may stay around for
a little longer (until the owning client destroys it). When the offer is
finally destroyed, we have to be careful to only remove the source
destroy listener if the source hasn't yet been destroyed.
Thanks to Martin Minarik for tracking down where the corruption happened.
The wl_data_source object used to specify the implementation for data
offers created for it. This means you need a data offer to retrieve the
data from the source, which makes it awkward to use in-process in a
compositor. Now we instead have three virtual functions that can be
connected to a protocol object or in-process data-sources such as an
X server proxy or clipboard.
This event sends the current keyboard modifier/group state from the
compositor to the client, allowing all clients to have a consistent view
of the keyboard state (e.g. current layout, Caps Lock, et al). It
should be sent after a keyboard enter event, and also immediately after
any key event which changes the modifier state.
Signed-off-by: Daniel Stone <daniel@fooishbar.org>
If wl_pointer_set_focus or wl_keyboard_set_focus have been called before
a listener has been established for that seat and client combination,
the focus window will be set but the focus resource will be NULL. This
changes these functions to always attempt to search for the relevant
focus resource, allowing the resource to be set by calling
wl_keyboard_set_focus and wl_pointer_set_focus again when a listener has
been established.
Signed-off-by: Daniel Stone <daniel@fooishbar.org>
The core libwayland libraries should not handle logging, only passing
the error messages to subscribed functions.
An application linked to libwayland-server or libwayland-client
will be able to set own functions (one per library) to handle error
messages.
Change in this series: make the wl_log return int, because
of compatibility with printf. It will return the number of bytes logged.
Properly handle a drag with no data source, i.e., don't crash and send
events only to the client that initiated the drag. This way a client can
do self drag and drop without offering anything to other clients.
The commit that split wl_input_device into wl_seat and friends changed
erroneously the drag icon destroy listener, causing it to operate into
an invalid pointer to a wl_seat.
This avoids a valgrind error like:
==31496== Conditional jump or move depends on uninitialised value(s)
==31496== at 0x407620: weston_buffer_post_release (compositor.c:928)
==31496== by 0x406AEB: weston_surface_attach (compositor.c:725)
==31496== by 0x409EB8: pointer_attach (compositor.c:2009)
==31496== by 0x34ECE05D63: ffi_call_unix64 (unix64.S:75)
==31496== by 0x34ECE05784: ffi_call (ffi64.c:486)
==31496== by 0x5674C4D: wl_closure_invoke (connection.c:770)
==31496== by 0x566ECCB: wl_client_connection_data (wayland-server.c:255)
==31496== by 0x56722F9: wl_event_source_fd_dispatch (event-loop.c:79)
==31496== by 0x5672C99: wl_event_loop_dispatch (event-loop.c:410)
==31496== by 0x56705FF: wl_display_run (wayland-server.c:1004)
==31496== by 0x40C775: main (compositor.c:2937)
==31496== Uninitialised value was created by a heap allocation
==31496== at 0x4A074CD: malloc (vg_replace_malloc.c:236)
==31496== by 0x5670EA7: shm_pool_create_buffer (wayland-shm.c:113)
==31496== by 0x34ECE05D63: ffi_call_unix64 (unix64.S:75)
==31496== by 0x34ECE05784: ffi_call (ffi64.c:486)
==31496== by 0x5674C4D: wl_closure_invoke (connection.c:770)
==31496== by 0x566ECCB: wl_client_connection_data (wayland-server.c:255)
==31496== by 0x56722F9: wl_event_source_fd_dispatch (event-loop.c:79)
==31496== by 0x5672C99: wl_event_loop_dispatch (event-loop.c:410)
==31496== by 0x56705FF: wl_display_run (wayland-server.c:1004)
==31496== by 0x40C775: main (compositor.c:2937)
This ends up propagating through and creating a valgrind error like:
==22573== Conditional jump or move depends on uninitialised value(s)
==22573== at 0x409E57: pointer_attach (compositor.c:1999)
==22573== by 0x34ECE05D63: ffi_call_unix64 (unix64.S:75)
==22573== by 0x34ECE05784: ffi_call (ffi64.c:486)
==22573== by 0x5674C45: wl_closure_invoke (connection.c:770)
==22573== by 0x566ECCB: wl_client_connection_data (wayland-server.c:255)
==22573== by 0x56722F1: wl_event_source_fd_dispatch (event-loop.c:79)
==22573== by 0x5672C91: wl_event_loop_dispatch (event-loop.c:410)
==22573== by 0x56705F4: wl_display_run (wayland-server.c:1003)
==22573== by 0x40C775: main (compositor.c:2937)
wl_input_device has been both renamed and split. wl_seat is now a
virtual object representing a group of logically related input devices
with related focus.
It now only generates one event: to let clients know that it has new
capabilities. It takes requests which hand back objects for the
wl_pointer, wl_keyboard and wl_touch interfaces it exposes which all
provide the old input interface, just under different names.
Signed-off-by: Daniel Stone <daniel@fooishbar.org>
'fixed' is a signed decimal type which offers a sign bit, 23 bits of
integer precision, and 8 bits of decimal precision. This is exposed as
an opaque struct with conversion helpers to and from double and int on
the C API side.
Signed-off-by: Daniel Stone <daniel@fooishbar.org>
Closing an fd will remove it from the epoll set only if it hasn't been
dup'ed. In other words, the fd is only removed from epoll when all file
descriptors referring to the open file has been close. We now dup
fd for fd sources, so we need to use EPOLL_CTL_DEL directly now.
