A question about df command

Juan Pablo Tejela <[email protected]> Tue, 25 Nov 2003 09:46:58 +0100
Newsgroups gmane.comp.gnu.fileutils.bugs
Message-ID <[email protected]>
 Hello!

I am Juan Pablo (from Spain, sorry for my English), a C Programmer for
Linux. I need to get some informations about disk capacity and free space. How 
can I get them? Where files and fields of /proc tree tell me that 
information?

Thank you very much!