Railo has predifined directory placeholders that can be used in your code or servlet config.

In code:

{railo-web}: #expandPath("{railo-web}")#<br />
{railo-server}: #expandPath("{railo-server}")#<br />
{temp-directory}: #expandPath("{temp-directory}")#<br />
{home-directory}: #expandPath("{home-directory}")#<br />
{web-root-directory}: #expandPath("{web-root-directory}")#<br />
{system-directory}: #expandPath("{system-directory}")#<br />

Attach a log file to email

<cfmailparam file="#expandPath("{railo-web}")#\logs\GoogleBot.log" >

See details on using Railo directory placeholders in config files.