setup(2) System Calls Manual setup(2)
setup - setup devices and filesystems, mount root filesystem
Standard C library (libc, -lc)
#include <unistd.h> [[deprecated]] int setup(void);
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.
setup() always returns -1 for a user process.
EPERM Always, for a user process.
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)