setup(2) — Linux manual page

NAME \| LIBRARY \| SYNOPSIS \| DESCRIPTION \| RETURN VALUE \| ERRORS \| STANDARDS \| VERSIONS

setup(2)                   System Calls Manual                  setup(2)

NAME top

       setup - setup devices and filesystems, mount root filesystem

LIBRARY top

       Standard C library (libc, -lc)

SYNOPSIS top

       #include <unistd.h>

       [[deprecated]] int setup(void);

DESCRIPTION top

       setup() 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 filesystem.

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

RETURN VALUE top

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

ERRORS top

       EPERM  Always, for a user process.

STANDARDS top

       Linux.

VERSIONS top

       Removed in Linux 2.1.121.

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

Linux man-pages 6.04           2023-03-30                       setup(2)

Pages that refer to this page: syscalls(2)