linux/kernel/utsname_sysctl.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  Copyright (C) 2007
 *
 *  Author: Eric Biederman <[email protected]>
 */

#include <linux/export.h>
#include <linux/uts.h>
#include <linux/utsname.h>
#include <linux/random.h>
#include <linux/sysctl.h>
#include <linux/wait.h>
#include <linux/rwsem.h>

#ifdef CONFIG_PROC_SYSCTL

static void *get_uts(const struct ctl_table *table)
{ … }

/*
 *	Special case of dostring for the UTS structure. This has locks
 *	to observe. Should this be in kernel/sys.c ????
 */
static int proc_do_uts_string(const struct ctl_table *table, int write,
		  void *buffer, size_t *lenp, loff_t *ppos)
{ … }
#else
#define proc_do_uts_string …
#endif

static DEFINE_CTL_TABLE_POLL(hostname_poll);
static DEFINE_CTL_TABLE_POLL(domainname_poll);

// Note: update 'enum uts_proc' to match any changes to this table
static struct ctl_table uts_kern_table[] = …;

#ifdef CONFIG_PROC_SYSCTL
/*
 * Notify userspace about a change in a certain entry of uts_kern_table,
 * identified by the parameter proc.
 */
void uts_proc_notify(enum uts_proc proc)
{ … }
#endif

static int __init utsname_sysctl_init(void)
{ … }

device_initcall(utsname_sysctl_init);