setup - Online Linux Manual PageSection : 2
Updated : 2022-10-30
Source : Linux man-pages 6.03

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NAMEsetup − setup devices and filesystems, mount root filesystem

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LIBRARYStandard C library (libc, −lc)

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SYNOPSIS#include <unistd.h>int setup(void);

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

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RETURN VALUEsetup() always returns −1 for a user process.

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ERRORSEPERM  Always, for a user process.

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VERSIONSSince Linux 2.1.121, no such function exists anymore.

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STANDARDSThis function is Linux-specific, and should not be used in programs intended to be portable, or indeed in any programs at all.

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NOTESThe calling sequence varied: at some times setup() has had a single argument void *BIOS" and at other times a single argument int magic. 0

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Johanes Gumabo

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