Not Sure about this one

[JimTR]

Hi I now have PHP, LGSM & TMUX all talking nicely to each other so I have added LGSM support to my API code, however in a certain part of the code I am waiting for a task to finish, easy get the pid of the process and wait for it to disappear. The code ended in an infinite loop, so I had look at this and saw this as the only explanation.

so as you can see there is only 1 tmux task running (red arrow) both games so for some reason the pid I recorded at start was incorrect hence the loop. you will also notice there is a 'cat' task per game still open I don't think that would have any bearing on the tmux issue but interesting nevertheless. I have just opened up a pair of tmux windows and ran up 2 servers and the effect is the same so this is a tmux issue rather than an LGSM issue. but the 'cat' issues are LGSM as they don't appear in the task list if you start the servers manually. I just left this here just in case someone else out there gets caught out waiting for a task to finish that isn't there in the first place.

[JimTR]

Did a lot of testing with this , it appears that the first server started also starts the tmux server for some reason when the PID is created in /proc/xxxxx tmux takes the command line as it's 'title' then actually runs the game as child process, subsequent tmux sessions are then just entered as children of the original pid
this sort of bares the above up

the above image was taken from a machine with a single user running 3 games, the one below shows another server with 2 users running 1 game server each notice that tmux has an instance per user (expected), but adding another server then adds the second game server as per image 1.

I guess there is no fix for this as it's a tmux issue but if you do need to use the pid of a running server query the child processes and don't kill the parent !
as a foot note screen actually runs a pid per server

which does make it a little easier to manage, but screen appears to gobble more memory and a bit slower to get the terminal up & running , a bit slower to take input (send keys) .. oh well you can't win em all !

[JimTR]

I know I'm chatting to myself as for some reason I am a pariah here. however I have the answer.
I stepped back and thought about the differences between screen & tmux in the way they do things, major difference is screen uses socket a per window, tmux does not. However tmux can run it's own socket with the -L switch. Once you start tmux on it's own socket you get a different effect . for example try this
tmux new
then in that opened tmux window type
tmux new
the reply will be
sessions should be nested with care, unset $TMUX to force
and exit tmux
now in the same window run tmux -L <mysocket> new and hey presto you have tmux running within tmux no problem, well nearly no problem as the key bindings are the same for both the inner and outer windows so you can not detach the inner window as the outer takes control of key bindings. Next one to try is tmux -L <mysocket> -f /path/to/config_file. So we write a config file and put something like this in it

unbind C-b
set-option -g prefix ł // set key to Alt Gr-l
bind-key ł send-prefix
set-option -g status-position top // status bar at the top
set -g mouse on
set -g status-bg colour250
set-option -g status-left "LinuxGSM "// set the left bar to the product name
the config file can be called anything you like but tmux must be able to read it.
the inner tmux window opens & you can now control it, in this instance, with Alt Gr and l .
This now gives each server instance it's own master pid rather than the grouped version when you don't use the -L option .
In terms of LGSM there are few modes to be made e.g adding -L "${sessionname}" to the relevant tmux commands, I think I found one as "${servicename}" in some place and all is good (and disable tmux exception module) . For my vanity I added an extra line to the start script just below the start command
tmux -L "${sessionname}" -f console.conf new -d -x "${sessionwidth}" -y "${sessionheight}" -s "${sessionname}" "${preexecutable} ${executable} ${startparameters}" 2> "${lgsmlogdir}/.${selfname}-tmux-error.tmp"
tmux -L "${sessionname}" rename-window "${sessionname}"
which just tidies the console see below

as for can see the server name has been added to the status bar. thanks for not reading