Just discovered this morning how to show the path on the ASMCMD tool and could not be easier:
anjovm2:/home/grid:+ASM2 $ asmcmd -p ASMCMD [+] > cd dgdata ASMCMD [+dgdata] > cd db12c ASMCMD [+dgdata/db12c] > ls CONTROLFILE/ DATAFILE/ ONLINELOG/ PARAMETERFILE/ TEMPFILE/ spfiledb12c.ora ASMCMD [+dgdata/db12c] > cd datafile ASMCMD [+dgdata/db12c/datafile] >