SETUP Section: Linux Programmer's Manual (2) Updated: 3 May 2025 Index   NAME setup - setup devices and file systems, mount root file system   SYNOPSIS #include <unistd.h> _syscall0(int, setup); 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 super-user permission, will receive EPERM.   RETURN VALUE setup always returns -1 for a user process.   ERRORS EPERM Always, for a user process.   CONFORMING TO This function is Linux specific, and should not be used in programs intended to be portable.   Index NAME SYNOPSIS DESCRIPTION RETURN VALUE ERRORS CONFORMING TO This document was created by using the manual pages. Time: 11:56:07 GMT, March 24, 2025