Get login name and/or path to home directory of current user?

I've checked everything that seems likely in the docs, but I'm coming up 
blank except for three Java methods, which don't help much, since I'm 
coding to Carbon. 

I need to open and read a log file that's user-specific, and based on 
the data in it, generate a re****t for the user. The semi-tricky part is 
that it will always be found in the user's home directory, and any user 
on the machine will have his/her own copy of it. I only want to build 
the re****t for the currently logged-in user.

The good news is that I always know the file's path: 
"/Users/LoginName/Client.log", so I can easily pass it to 
FSPathMakeRef() to get an FSRef to work with.

The bad news is that I can't figure out how to figure out who the user 
running *MY* application is so that I can plug it into the path and get 
an FSRef to the right user's file. 

The problem I'm having is figuring out how to determine who the current 
user is so I can build the path to the file.

As mentioned above, I've found three "likely suspects" in the XCode help 
system (currentFullUserName(), currentUserName(), and 
currentHomeDirectory() ) that look like they'd do the job for me with 
varying degrees of "make it dead simple", but all three are Java 
methods, and I'm coding in C, to the Carbon API.

-- 
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