No manual entry

For Ubuntu 9.04

When requesting the usage of fputs() in my Ubuntu 9.04, I got no manual entry for fputs(). Google tells me ...

$ man fputs
No manual entry for fputs
$ sudo apt-get install manpages-dev manpages-posix-dev glibc-doc

@ 2009-11-17
manpages-posix-dev ... for pthread ...

glibc-doc ... for others...

.