debian man page for setup

SETUP(2)						     Linux Programmer's Manual							  SETUP(2)

NAME
       setup - setup devices and file systems, mount root file system

SYNOPSIS
       #include <unistd.h>

       int setup(void);

DESCRIPTION
       setup()	is  called once from within linux/init/main.c.	It calls initialization functions for devices and file systems configured into the
       kernel and then mounts the root file system.

       No user process may call setup().  Any user process, even a process with superuser permission, will receive EPERM.

RETURN VALUE
       setup() always returns -1 for a user process.

ERRORS
       EPERM  Always, for a user process.

VERSIONS
       Since Linux 2.1.121, no such function exists anymore.

CONFORMING TO
       This function is Linux-specific, and should not be used in programs intended to be portable, or indeed in any programs at all.

NOTES
       The calling sequence varied: at some times setup () has had a single argument void *BIOS and at other times a single argument int magic.

COLOPHON
       This page is part of release 3.44 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2008-12-03								  SETUP(2)