This table is "just a normal Lua table". Lua code can use it in whatever
way it wants to store things related to a given C object.
An object (userdata) already references a "plain Lua table" via
lua_setuservalue() / lua_setfenv(). This is used to keep a reference to
signal functions that are connected to an object. The signal code only
uses lightuserdata keys in this table. This commit adds an entry with
key "data" to this table which just references another table. This is
the table that is made available as .data.
Via this .data property, Lua code can add own properties to C objects
without having to use, for example, weak tables. The weak tables have
the downside that they produce a leak if the value references the key.
The new .data property does not have any such problem (no weak
references are involved).
This new data property is not documented, because I'd have to touch lots
of files and I'm lazy.
Signed-off-by: Uli Schlachter <psychon@znc.in>
Before this commit: When we are GC'ing an object, we clear its metatable, since
otherwise crashes could occur in various places. This means that if someone
tries to use such an object, they get an unhelpful error message like "attempt
to index userdata object" and they don't understand what the problem is. Also,
this means that foo.valid does not actually work after GC.
This commit changes this behaviour. Instead of setting an empty metatable, we
now create a metatable with an __index and __newindex method. These metamethods
produce better error messages that they sat the underlying object was already
garbage collected. Better yet, the __index metamethod makes foo.valid be false
instead of causing an error, so that the existing machinery for detecting
invalid objects continues to work.
This commit also adds a functional test that verifies this behaviour.
Signed-off-by: Uli Schlachter <psychon@znc.in>
The code was written so that it assumes that disconnecting the last signal also
removed the corresponding entry in the signal array. This lead e.g. to an
index-out-of-bounds access in some cases.
Signed-off-by: Uli Schlachter <psychon@znc.in>
When called with "--version", awesome prints the Lua version that it was
compiled against and the one that it is running against. This commit makes the
code detect LuaJIT and makes it print the LuaJIT version instead of an
unspecific "Lua 5.1".
Signed-off-by: Uli Schlachter <psychon@znc.in>
When a function is disconnected from a signal ("disconnect_signal") that is not
actually connected to the function, two things happened:
1. The attempt to remove the function from the signal array didn't do anything
2. Unreferencing the function noticed that the function wasn't referenced
The second step printed a big, fat scary warning.
Actually, this has the possibility of causing errors. For example, in the
following code, awesome would wrongly unreference the function at the
disconnect_signal() call and might later still try to call it when the
"refresh" signal is emitted:
do
local function f() end
awesome.connect_signal("refresh", f)
awesome.disconnect_signal("debug::error", f)
end
Fix this by making signal_disconnect() return a boolean value indicating if it
actually did something. All callers are fixed to use this value and only update
the reference counts if something was actually disconnected.
Fixes: https://github.com/awesomeWM/awesome/issues/814
Signed-off-by: Uli Schlachter <psychon@znc.in>
A client c could have no c.machine or no c.pid because the corresponding
properties are not set on its window. Previously, the C code would return an
empty string or 0 for these values. This commit makes the C code give Lua no
value instead (not even a nil).
Signed-off-by: Uli Schlachter <psychon@znc.in>
The XEmbed protocol defines a special property that defines if the embedded
window wants to be visible or not. Up to now, awesome always ignored this entry
and instead behaved as if the bit was set. This commit makes it properly respect
the bit.
Testing done: None. No idea how. Apparently nothing really uses this bit,
because we didn't get bug reports about it yet.
Signed-off-by: Uli Schlachter <psychon@znc.in>
The argument to luaL_checkstack() is the amount of new stack to make available,
not the new size of the stack. Thus, remove the addition of lua_gettop(L) here.
Signed-off-by: Uli Schlachter <psychon@znc.in>
E.g. trying to press mouse button 1.5 via root.fake_input() doesn't make sense.
Previously the code silently truncated the number to an integer. Now it
complains about this instead.
Signed-off-by: Uli Schlachter <psychon@znc.in>
The only remaining calls are for a window's opacity and in the DBus type
handling. Everything else wants integers, not something with a comma.
Signed-off-by: Uli Schlachter <psychon@znc.in>
luaA_warn() prints a Lua backtrace and thus generates more useful output. warn()
should only be used in awesome-internal places (e.g. receiving an error from the
X11 server).
Closes https://github.com/awesomeWM/awesome/pull/608.
Signed-off-by: Uli Schlachter <psychon@znc.in>
These fields were only ever written to since commit 19137a55c3.
This commit removes the fields and the code that sets them.
Signed-off-by: Uli Schlachter <psychon@znc.in>
Most of this information isn't interesting. If you are getting awesome from a
distro, then the time, hostname and username of the build are likely 'random
stuff' and if you are building awesome yourself, then the hostname and username
are obviously yours and the time can still be interfered based on the awesome's
binary ctime.
The GCC version shouldn't make any difference at all.
Closes https://github.com/awesomeWM/awesome/pull/566.
Signed-off-by: Uli Schlachter <psychon@znc.in>
This makes it possible to add something similar to a __index / __newindex
metamethod to all our C objects. Based on this, Lua can then easily implement
arbitrary properties on our capi objects.
This saves the order of clients in a property called AWESOME_CLIENT_ORDER on the
root window during shutdown. During startup, after managing all existing
windows, we force the client list into the order described by this property
(overwriting any changes that Lua possibly did).
This code should safely handle cases where the property doesn't contain all
existing clients or contains a client which doesn't exist anymore.
Signed-off-by: Uli Schlachter <psychon@znc.in>
Forgot to commit the change that adds _NET_FRAME_EXTENTS to the list of atoms
that we actually query for and export to the C code.
Signed-off-by: Uli Schlachter <psychon@znc.in>
Run the following code:
do
local d
local f = function() d.visible = true end
if _VERSION >= "Lua 5.2" then
setmetatable({}, { __gc = f })
else
getmetatable(newproxy(true)).__gc = f
end
d = drawin({})
end
collectgarbage("collect")
Awesome will segfault.
The reason for this is that after the above code ran, all variables in it are
unreferenced and will be garbage-collected at the next sweep phase. Lua runs
garbage collectors in the inverse order that their corresponding objects were
"marked" which means for the above code that the drawin's garbage collector will
run before function f runs. So the code will access the drawin after its
destructor already ran. Obviously, awesome's C code does not expect nor
correctly deal with this situation and was dereferencing a NULL pointer.
To fix this, this commit "unsets" the metatable of a userdata object when it is
being garbage collected. Since the type of a userdata is inferred via its
metatable, the object will no longer be accepted by luaA_toudata().
For the above code this will result in an unhelpful error message saying that
something tried to index a userdata, but userdata cannot be indexed. At least we
no longer crash and the traceback of the error will hopefully point at some __gc
metamethod which should be enough of a hint to figure out the problem.
Thanks-to: http://blog.reverberate.org/2014/06/beware-of-lua-finalizers-in-c-modules.html
Signed-off-by: Uli Schlachter <psychon@znc.in>
This property is especially useful for client objects which are unusable after
unmanage. "Unusuable" here means that pretty much everything you do with the
client object results in a lua error.
Syntax is c.valid.
Signed-off-by: Uli Schlachter <psychon@znc.in>
This means we have one less file which gets recompiled every time the result
from "git describe" changes.
Signed-off-by: Uli Schlachter <psychon@znc.in>
Every .c file has to include the corresponding .h file first to make sure the
headers are self-contained. Additionally, this moves some unneeded includes
around.
Signed-off-by: Uli Schlachter <psychon@znc.in>
This reverts commit a54636751b.
We now have the new xproperty API which does the same thing in a much nicer way.
Thanks to Elv13 for the idea!
Signed-off-by: Uli Schlachter <psychon@znc.in>
Our tag concept doesn't really fit into ewmh. Thus, we were setting this
property to a way too small value anyway (just the size of the first screen in
case of multiple screens).
Since this property is optional in ewmh, let's just drop it.
Signed-off-by: Uli Schlachter <psychon@znc.in>
If $SHELL is set to "bash", previously awesome failed to restart itself, because
it could not find "bash". This commit makes awesome use execlp() instead of
execl() which means that $PATH is searched if the started command does not
contain a slash and this problem is fixed.
$SHELL is specified in POSIX and it doesn't seem to require an absolute path
name.
Signed-off-by: Uli Schlachter <psychon@znc.in>
Thanks to Michael Stapelberg, there is now a xcb-only port of libXcursor which
does everything we need. This patch switches awesome over to that new library.
Since the only reason for using XOpenDisplay() instead of xcb_connect() was so
that we can use libXcursor, we can get back to that older state again. This
means that this effectively reverts the following commits:
531f8b415c "Added initial support for Xlib cursor themes"
77243cd09a "Add x11-xcb to the pkg-config checks"
779d43fc46 "Don't let Xlib own the event queue"
03759b4847 "Fix keyboard layouts"
Signed-off-by: Uli Schlachter <psychon@znc.in>
I hope this time i got all right with git format-patch.
Signed-off-by: Tumin Alexander <iamtakingiteasy@eientei.org>
Signed-off-by: Uli Schlachter <psychon@znc.in>
I assume nobody have tried to compile Awesome with GNU uncompatible
compiler for ages and thus non-__GNUC__ p_delete version got
overlooked for quite some time.
First of all, a problem I see is that it assigns void** to a variable
of type void* and then dereferences the same void* variable.
None of the compilers I am aware of will let you go through this
without an error.
And second of all, lets have one portable p_delete.
Signed-off-by: Arvydas Sidorenko <asido4@gmail.com>
Signed-off-by: Uli Schlachter <psychon@znc.in>
This allows lua code to set a wallpaper directly instead of having to spawn some
external tools which possibly aren't installed.
Signed-off-by: Uli Schlachter <psychon@znc.in>
Previously, awesome would just crash when execv() fails, because it already
destroyed all of its internal state, but then tries to do another main loop
iteration. Whoops.
Signed-off-by: Uli Schlachter <psychon@znc.in>
In Lua 5.1 lua_open directly calls luaL_newstate, but was deprecated.
In Lua 5.2 lua_open was removed.
Signed-off-by: Arvydas Sidorenko <asido4@gmail.com>
Lua 5.2 removed lua_[gs]etfenv and introduced
lua_[gs]etuservalue. Not sure though if it provides
the required functionality which awesome is using.
Thus, need some testing.
Signed-off-by: Arvydas Sidorenko <asido4@gmail.com>
Uli Schlachter
Uli Schlachter
Kazunobu Kuriyama
Daniel Hahler
Daniel Hahler
Julian Wollrath
Gregor Best
Tumin Alexander
Arvydas Sidorenko