setup(2) System Calls Manual setup(2)
NAME
setup - setup devices and filesystems, mount root filesystem
LIBRARY
Standard C library (libc, -lc)
SYNOPSIS
#include <unistd.h>
int setup(void);
DESCRIPTION
setup() is called once from within linux/init/main.c. It calls ini-
tialization 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
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.
STANDARDS
This function is Linux-specific, and should not be used in programs in-
tended to be portable, or indeed in any programs at all.
NOTES
The calling sequence varied: at some times setup() has had a single ar-
gument void *BIOS and at other times a single argument int magic.
Linux man-pages 6.03 2022-10-30 setup(2)
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