DL6ER 5df7ed2f32 Obtain FTL's PID from the PID file (#4103) ...

* Try to obtain FTL's PID from the PID file. If this fails, try to identify the main process using pgrep --oldest (instead of relying on pkill finding the right one by itself). This allows the script to work in even when FTL is running inside the memory checker valgrind.

* Rename FTL_PID -> FTL_PID_FILE

* Remove the pgrep fallback after discussions about that it should be more obvious to users if something strange happened to their PID file. Also, simplify the routine using a bashism in the end.

* Shorten if [[ regex ]]

* Use unset instead of emptying the PID variable

Signed-off-by: DL6ER <dl6er@dl6er.de>

Co-authored-by: Dan Schaper <dan.schaper@pi-hole.net>

2021-04-14 09:33:10 -07:00

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