Running Xorg as a service.

[SolitudeSF]

Im trying to run Xorg as a user service. Practicality of this in my current setup, i admit, is dubious, but i have an itch to make it work. Im running relatively recent dinit, launching it from .profile instead of startx.
I have this as a definition of xorg service:

type = process
command = $XDG_CONFIG_HOME/dinit/scripts/startx
ready-notification = pipevar:DINIT_READYFD
options = runs-on-console
restart = no

and this is the launcher script (stripped down sx):

#!/bin/sh --
tty=$(tty)
tty=${tty#/dev/tty}
dinitctl setenv DISPLAY=:"$tty"

cfgdir=${XDG_CONFIG_HOME:-$HOME/.config}/sx
datadir=${XDG_DATA_HOME:-$HOME/.local/share}/sx
mkdir -p -- "$cfgdir" "$datadir"

export XAUTHORITY="${XAUTHORITY:-$datadir/xauthority}"
touch -- "$XAUTHORITY"

xauth add :"$tty" MIT-MAGIC-COOKIE-1 "$(od -An -N16 -tx /dev/urandom | tr -d ' ')"

Xorg :"$tty" -keeptty vt"$tty" -noreset -auth "$XAUTHORITY" -displayfd "$DINIT_READYFD"

the issue is that when xorg runs, Xorg successfully starts and after going through initialization instantly stops with Server succesfully terminated (0), without any error in sight. When the same script is ran by hand from a tty, Xorg launches and stays running as expected. Am i missing some configuration option? What is the difference between the environments?

[mobin-2008]

Hello. Take a look at ~/.local/share/xorg/ log files both from login shell and from dinit.

[davmac314]

The service description has no logfile = entry, so there won't be any log from dinit.

[davmac314]

I think what you mean is: compare the Xorg log file from ~/.local/share/xorg/ (it will be named Xorg.0.log for example) for when X is started successfully (via the shell) versus when it is started unsuccessfully by Dinit. (That isn't very clear from the message.)

[davmac314]

One obvious problem that I can see is the -displayfd "$DINIT_READYFD" argument to Xorg. The readiness fd is for readiness notification, this appears to be telling Xorg to use it for the display (which isn't possible).

[SolitudeSF]

-displayfd fd file descriptor to write display number to when ready to connect

[davmac314]

Ah you're totally right, my bad.
Did you check the Xorg log as mobin suggested?

[davmac314]

(Also might be worth setting logfile = entry in the service description and see if you get any output to it).

Sorry, forgot it was runs-on-console so this isn't appropriate. Not thinking straight today.

[davmac314]

One other thing: is dinit actually connected to the tty? A runs-on-console service just gets dinit's own stdin/stdout, so if they are not the terminal, then the tty=$(tty) line will probably fail (with "not a tty").

[SolitudeSF]

One thing i missed is setenving XAUTHORITY too, so dependant services can use Xorg. After enabling/disabling xorg service few times and some other misc rearrangements it no longer immediately stops, and i dont have patience to try reproducing it. So it works now.

[SolitudeSF]

Computers are magic.