https://github.com/troglobit/finit/blob/2760616c73af1284bd71ae9aa8226c3da3ff8544/src/service.c#L1420

prev and svc->args[...] are compared but prev has less bytes available than svc->args[...] does, which can result in truncated data being compared to determine if a service is dirty

for example:

service [234] name:mariadb restart:10 @mariadb:mariadb <!service/syslogd/ready,task/mariadb-init/success> notify:systemd log /nix/store/z5lmh4g28xxbdjc6zsblajw91fnmjd8d-mariadb-server-10.11.13/bin/mysqld --defaults-file=/etc/my.cnf --user=mariadb --datadir=/var/lib/mariadb --basedir=/nix/store/z5lmh4g28xxbdjc6zsblajw91fnmjd8d-mariadb-server-10.11.13 -- mariadb database service

this results in finit marking some of my services as dirty every time i run initctl reload

by giving prev the same size as what it will be compared against we can ensure a valid comparison

fully tested on my machine and ready to go 👍