GLib is very careful not to "fetch" any children that it was not asked
to fetch. Thus, if awesome inherits some children, it does not reap them
and starts collecting zombies.
Thus, this commit makes awesome handle SIGCHLD directly: On SIGCHLD, a
byte is written to a pipe. The main loop reads from this pipe and
collects children via waitpid(-1). Unknown children cause a warning to
be printed. We might want to remove this warning if it turns out to be
annoying.
This commit adds 79 lines and removes 89 lines. Thus, this is a net
reduction in lines of codes. This is because previously, we gave the
list of still-running children that we know about to the next awesome
instance we a --reap command line argument. This was added so that
awesome does not get zombie children. However, this commit fixes this
problem and makes all the code for this 'feature' unnecessary.
Fixes: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=886393
Signed-off-by: Uli Schlachter <psychon@znc.in>
This adds a new argument to awesome.spawn that can be used to specify
the environment of the spawned process.
Signed-off-by: Uli Schlachter <psychon@znc.in>
This function is documented to return "an error string if an error
occurred". However, the function actually threw a Lua error instead.
Signed-off-by: Uli Schlachter <psychon@znc.in>
Commit e54361a374 added code so that we pass the list of
currently running children across restart via an environment variable.
As Colin Walters correctly points out, setenv() is not safe in a
multi-threaded processes.
Thus, instead of using the environment, use the command line to pass
this information along.
https://github.com/awesomeWM/awesome/issues/1812
Signed-off-by: Uli Schlachter <psychon@znc.in>
In Unix, so that a process can learn about the exit status of the child
processes that it started, children become zombie processes until the
parents collects their exit information. We use glib both for starting
and for collecting processes. However, when awesome is restarted, the
new instance inherits children, but does not know about them and does
not inherit them.
Fix this by explicitly tracking a list of running child processes and by
serialising them across a restart via an environment variable. The new
awesome instance can then watch for these child processes, but besides
that it ignores them and does not use their exit status in any way.
Thanks to Colin Walters for the hint with serialising the list of processes.
Fixes: https://github.com/awesomeWM/awesome/issues/1193
Signed-off-by: Uli Schlachter <psychon@znc.in>
Aborting the process is sometimes a bit harsh for a failed assertion.
This adds a non-fatal assert() macro called "check()" and uses it in
some places where we might be able to survive the error.
Signed-off-by: Uli Schlachter <psychon@znc.in>
Including <sys/wait.h> is required on FreeBSD for WIFEXITED and another couple
of macros.
This includes sys/types.h and sys/wait.h always as described in waitpid(2).
Commit 5e6a893 broke error handling in awesome.spawn(): Instead of
returning an error message, it would just return its last argument.
This commit fixes that, removes some not-so-helpful warnings, and adds
lots of tests for this code.
Fixes: https://github.com/awesomeWM/awesome/issues/1281
Signed-off-by: Uli Schlachter <psychon@znc.in>
It does not provide much value. The version number is already known to
ldoc globally in the "description" variable.
Signed-off-by: Uli Schlachter <psychon@znc.in>
The spawn code didn't properly handle the case where there
is an empty command stream. In that case, no error is
reported as there is simply nothing to do. The error message
was probed and this caused an invalid read and crash.
Fix#1033
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>
This adds a new argument to awesome.spawn. This argument is a function that will
be called with the exit status once the spawned process terminates. For normal
exit, the function is called with "exit" and the exit code. If the process is
terminated by a signal, the function will be called with "signal" and the signal
number of the signal that caused termination.
Signed-off-by: Uli Schlachter <psychon@znc.in>
The ID for startup notification is transmitted to the spawned process via the
DESKTOP_STARTUP_ID environment variable. Before this commit, we set this
variable in the main process. This meant that if we started something "without"
a startup id, then it might get the ID that was used by the last spawn and which
was still saved in our env. Fix this by setting the environment variable only
after fork().
Small anecdote: The above wasn't enough to make Daniel's test case succeed and
at first I couldn't figure out why.
Turns out that rxvt-unicode doesn't unset the DESKTOP_STARTUP_ID environment
variable (I think it should, according to some spec), even though it supports
startup notification. So awesome was already started with DESKTOP_STARTUP_ID set
and thus all spawned processes used this ID.
Fix this by explicitly unsetting DESKTOP_STARTUP_ID if we don't set any new
value (even though this breaks encapsulation; we shouldn't have to care about
this "implementation detail" of libstartup-notification).
Signed-off-by: Uli Schlachter <psychon@znc.in>
This adds three new arguments to awesome.spawn() that tell it to return pipes
for stdin, stdout and stderr of the spawned process.
Signed-off-by: Uli Schlachter <psychon@znc.in>
Everything that needs the lua_State should create a local variable like this:
lua_State *L = globalconf_get_lua_State();
This ensures that the compiler warns if there are two variables with name "L" in
scope. The idea here is that it should become harder to accidentally use the
global lua state instead of the state of the current state.
While writing this commit, I found another place that gets its wrong: Reading
client.focus from a coroutine was broken, since it was returning the result on
the main thread instead of the current one.
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 allow to spawn something, then apply some properties or rules when
the client show up ("manage").
This commit add:
* "startup_id" property for all clients object (immutable, can be nil)
* Second return value to awful.util.spawn() with the startup_id
* Update the documentation
Example:
local wait_for_it = {}
local pid,snid = awful.util.spawn("urxvtc")
wait_for_it[snid] = {ontop=true,sticky=false,
tag = awful.tag.gettags(mouse.screen)[1] }
client.connect_signal("manage", function (c, startup)
if c.startup_id and wait_for_it[c.startup_id] then
for k,v in pairs(wait_for_it[c.startup_id]) do
c[k] = v
end
if wait_for_it[c.startup_id].tag then
c:tags({wait_for_it[c.startup_id].tag})
end
end
end)
Signed-off-by: Uli Schlachter <psychon@znc.in>
Since commit 3c40d6b, the passed in argument is decomposed into an array of
strings before the sn-related code runs. This means we already know argv[0] and
thus we don't need the code here that tries to figure it out again.
Signed-off-by: Uli Schlachter <psychon@znc.in>
Previously, any not-string-convertible entry in the array argument would result
in lua_tostring() returning NULL which g_strdup() would pass through. Thus, we
would end up with a NULL entry in an array whose end is marked with a NULL
entry. This mainly means that we had a memory leak.
Fix this by actually verifying that we only have strings in the table that we
are looking at.
Signed-off-by: Uli Schlachter <psychon@znc.in>
When e.g. calling awesome.spawn({}), our argv array would be empty, so just a
pointer to a NULL pointer that marks the end of the array.
Since startup notification was enabled, this would then try to figure out the
name of the started binary. This would immediately dereference a NULL pointer
and crash.
Signed-off-by: Uli Schlachter <psychon@znc.in>
With this change, awesome.spawn() can be called with a table as its command line
argument. This gets rid of lots of problems with escaping the arguments. For
example, the following call is now possible:
awesome.spawn({ "bash", "-c", "echo \"foo\"" })
Thanks to Ignas Anikevičius for inspiring me to this.
Signed-off-by: Uli Schlachter <psychon@znc.in>
This commit ports awesome from libev to the glib main loop. This means that
awesome has fewer dependencies, because we were already depending on glib before
and now no longer need glib.
However, the main reason for this change is that, thanks to lgi, we have glib
bindings for lua. This means that lua code can add all kinds of event sources to
the main loop (timeouts, fd watchers, SIGCHLD watchers, ....). Yay
Signed-off-by: Uli Schlachter <psychon@znc.in>
This option is no longer valid in modelines, so it has been removed from
all modelines using the following shellscript:
#!/bin/ksh
git ls-tree -r HEAD | cut -f2 | while read f; do
egrep -e '^(//|--) vim: .*encoding=' $f >/dev/null || continue
sed -E -e '/^(\/\/|--) vim:/s/:encoding=utf-8//' $f > /tmp/foo
mv /tmp/foo $f
done
Signed-off-by: Gregor Best <gbe@ring0.de>
Signed-off-by: Uli Schlachter <psychon@znc.in>
Each process spawned from awesome now gets its own session and process group.
This makes sure they aren't connected to awesome in any way any more. This
especially fixes some problems with signals.
Signed-off-by: Uli Schlachter <psychon@znc.in>
This commit makes it an error if an unknown signal is connected, disconnected or
emitted. All signals have to be added before they can be used.
Signed-off-by: Uli Schlachter <psychon@znc.in>
This makes awesome support only a single X11 protocol screen. If you are still
using zaphod mode, you can run multiple instances of awesome on the single
screens, e.g.:
DISPLAY=:1.0 awesome & DISPLAY=:1.1 awesome &
Signed-off-by: Uli Schlachter <psychon@znc.in>
Daniel Hahler
Uli Schlachter
Uli Schlachter
Renato Botelho
Emmanuel Lepage Vallee
actionless
Daniel Hahler
Julian Wollrath
Majic
Gregor Best