The kernel's command line: the arguments the boot loader passed, such as root=/dev/hda2 or apic=off. More...

#include <core/system.h>
#include <core/string.h>
#include <core/kargs.h>
#include <aquila/errno.h>

Data Structures
struct	[struct].kargs

Macros
#define	MAX_ARGS 128

Functions
int	kargs_parse (const char *_cmdline)
	Splits the kernel's command line into arguments, at boot.
int	kargs_get (const char key, const char *value)
	Looks up an argument of the kernel's command line.

Variables
static struct	kargs [MAX_ARGS]
static int	kargc

Detailed Description

The kernel's command line: the arguments the boot loader passed, such as root=/dev/hda2 or apic=off.

The command line is split once at boot into key or key=value arguments, and the rest of the kernel looks them up by key.

Definition in file kargs.c.

Macro Definition Documentation

◆ MAX_ARGS

#define MAX_ARGS 128

Definition at line 15 of file kargs.c.

Referenced by kargs_parse().

Function Documentation

◆ kargs_get()

int kargs_get	(	const char *	key,
		const char **	value )

Looks up an argument of the kernel's command line.

Parameters

key	the argument's name
value	if not NULL, set to the argument's value, or to NULL if it has none (key alone rather than key=value)

Returns: 0 if the argument was given, or -1 if it wasn't

Definition at line 73 of file kargs.c.

References kargc, kargs, and kargs_get().

Referenced by ata_probe(), earlycon_reinit(), i8042_init(), kargs_get(), kmain(), netif_config(), x86_apic_setup(), x86_clock_init(), x86_pit_period_set(), and x86_smp_init().

◆ kargs_parse()

int kargs_parse ( const char * _cmdline )

Splits the kernel's command line into arguments, at boot.

Parameters

_cmdline the command line, as the boot loader passed it

Returns: how many arguments there are, or -ENOMEM if there was no memory to split them

Definition at line 31 of file kargs.c.

References kargc, kargs, kargs_parse(), MAX_ARGS, NULL, and printk().

Referenced by aarch64_init(), kargs_parse(), and x86_cpu_init().

Variable Documentation

◆ kargc

int kargc

static

Definition at line 22 of file kargs.c.

Referenced by kargs_get(), and kargs_parse().

◆ kargs

struct [struct].kargs kargs[MAX_ARGS]