How to fetch unit with a dash?

[totszwai]

How to get your script to work with service that has a dash in its name?

[root@docker-desktop /]# /usr/pgsql-15/bin/postgresql-15-setup initdb
grep: : No such file or directory
grep: : No such file or directory
grep: : No such file or directory
grep: : No such file or directory
Failed to show -p.service: Unit -p.service not found.
failed to find PGDATA setting in postgresql-15.service

[root@docker-desktop /]# find / -name "*.service" | grep postgres
/usr/lib/systemd/system/postgresql-15.service