SETUP(2) - Linux man page online | System calls
Setup devices and filesystems, mount root filesystem.
SETUP(2) Linux Programmer's Manual SETUP(2)
Linux 2008-12-03 SETUP(2)
NAMEsetup - setup devices and filesystems, mount root filesystem
SYNOPSIS#include <unistd.h> int setup(void);
DESCRIPTIONsetup() is called once from within linux/init/main.c. It calls initialization functions for devices and filesystems configured into the kernel and then mounts the root filesys‐ tem. No user process may call setup(). Any user process, even a process with superuser permis‐ sion, will receive EPERM.
RETURN VALUEsetup() always returns -1 for a user process.
ERRORSEPERM Always, for a user process.
VERSIONSSince Linux 2.1.121, no such function exists anymore.
CONFORMING TOThis function is Linux-specific, and should not be used in programs intended to be porta‐ ble, or indeed in any programs at all.
NOTESThe calling sequence varied: at some times setup() has had a single argument void *BIOS and at other times a single argument int magic.
COLOPHONThis page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
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