Let's say I have the window manager Blackbox running on two different X displays, e.g. :0.0 and :1.0 launched from tty1 and tty2 respectively. From a terminal (emulator), how do I exit (kill) the Blackbox process that uses the current X display? The command killall blackbox does not fit since it terminates both sessions.
Here is a solution inspired by soubunmei's answer:
#!/bin/sh
ActiveWindowManagerPID()
{
local windowManager="$1"
local windowManagerPIDs="$(pidof "$windowManager")"
local displayNumber="$(echo $DISPLAY \
| awk 'BEGIN { FS = "[:.]" } { print $2 }')"
ps e -p "$windowManagerPIDs" \
| awk -v n="$displayNumber" \
'$0 ~ " DISPLAY=:" n "[\n .]" { print $1 }'
}
kill "$(ActiveWindowManagerPID blackbox)"
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