如何确定正在使用哪个my.cnf mysql

Question

Is there a way I can figure out which my.cnf mysql is currently using? The reason is because it's using the correct socket file to connect, but I can't figure out exactly which (if any) my.cnf it's using or trying to use so I can manually set the correct path on my local machine.

Answer 1

$ strace -f -e trace=open mysql 2>&1 | grep $SEARCH_STRING

where usually SEARCH_STRING='cnf' or SEARCH_STRING='ini'

The default extentions for the mysql configuration file are '.cnf' and '.ini' (see http://dev.mysql.com/doc/refman/5.1/en/option-files.html )

Answer 2

A bit hackish:

$ strace mysql 2>&1  | grep 'open' | grep '.cnf'
open("/etc/mysql/my.cnf", O_RDONLY|O_LARGEFILE) = 3
open("/home/reto/.my.cnf", O_RDONLY|O_LARGEFILE) = 3