Yes, there are 9 standard sections to the man pages. The third section contains every single C function in any C library. It's usually a lot faster to check an obscure function by typing man obscure_function, than scouring the internet for it. To see everything you can go here: http://linux.die.net/man/
. Here is the specific page for malloc: http://linux.die.net/man/3/malloc
. I was just using it as an example that should obviously be there. Maybe some less common things might not be.