#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/queue.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/priv.h>
#include <sys/kenv.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/sysent.h>
#include <sys/sysproto.h>
#include <sys/libkern.h>
#include <sys/limits.h>
#include <security/mac/mac_framework.h>

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Macros
#define	KENV_SIZE 512 /* Maximum number of environment strings */

#define	KENV_CHECK

Functions
	__FBSDID ("$FreeBSD$")

static char *	_getenv_dynamic_locked (const char name, int idx)

static char *	_getenv_dynamic (const char name, int idx)

static char *	kenv_acquire (const char *name)

static void	kenv_release (const char *buf)

static	MALLOC_DEFINE (M_KENV, "kenv", "kernel environment")

static char *	kernenv_next (char *)

static int	kenv_dump (struct thread td, char envp, int what, char value, int len)

int	sys_kenv (struct thread td, struct kenv_args uap)

void	init_static_kenv (char *buf, size_t len)

static void	init_dynamic_kenv_from (char init_env, int curpos)

static void	init_dynamic_kenv (void *data __unused)

	SYSINIT (kenv, SI_SUB_KMEM+1, SI_ORDER_FIRST, init_dynamic_kenv, NULL)

void	freeenv (char *env)

static char *	_getenv_static_from (char chkenv, const char name)

static char *	_getenv_static (const char *name)

char *	kern_getenv (const char *name)

int	testenv (const char *name)

static int	setenv_static (const char name, const char value)

int	kern_setenv (const char name, const char value)

int	kern_unsetenv (const char *name)

int	getenv_string (const char name, char data, int size)

int	getenv_array (const char name, void pdata, int size, int *psize, int type_size, bool allow_signed)

int	getenv_int (const char name, int data)

int	getenv_uint (const char name, unsigned int data)

int	getenv_int64 (const char name, int64_t data)

int	getenv_uint64 (const char name, uint64_t data)

int	getenv_long (const char name, long data)

int	getenv_ulong (const char name, unsigned long data)

int	getenv_quad (const char name, quad_t data)

int	getenv_bool (const char name, bool data)

bool	getenv_is_true (const char *name)

bool	getenv_is_false (const char *name)

void	tunable_int_init (void *data)

void	tunable_long_init (void *data)

void	tunable_ulong_init (void *data)

void	tunable_int64_init (void *data)

void	tunable_uint64_init (void *data)

void	tunable_quad_init (void *data)

void	tunable_bool_init (void *data)

void	tunable_str_init (void *data)

Variables
static uma_zone_t	kenv_zone

static int	kenv_mvallen = KENV_MVALLEN

char *	kern_envp

char *	md_envp

static int	md_env_len

static int	md_env_pos

char **	kenvp

struct mtx	kenv_lock

bool	dynamic_kenv

Macro Definition Documentation

◆ KENV_CHECK

#define KENV_CHECK

Value:

if (!dynamic_kenv) \

panic("%s: called before SI_SUB_KMEM", __func__)

dynamic_kenv

bool dynamic_kenv

Definition: kern_environment.c:90

Definition at line 92 of file kern_environment.c.

◆ KENV_SIZE

#define KENV_SIZE 512 /* Maximum number of environment strings */

Definition at line 68 of file kern_environment.c.

Function Documentation

◆ __FBSDID()

__FBSDID ( "$FreeBSD$" )

◆ _getenv_dynamic()

static char * _getenv_dynamic	(	const char *	name,
		int *	idx
	)

static

Definition at line 481 of file kern_environment.c.

References _getenv_dynamic_locked(), kenv_lock, and name.

Referenced by kenv_acquire(), kern_getenv(), kern_setenv(), and kern_unsetenv().

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◆ _getenv_dynamic_locked()

static char * _getenv_dynamic_locked	(	const char *	name,
		int *	idx
	)

static

Definition at line 463 of file kern_environment.c.

References kenvp, and name.

Referenced by _getenv_dynamic(), and init_dynamic_kenv_from().

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◆ _getenv_static()

static char * _getenv_static ( const char * name )

static

Definition at line 508 of file kern_environment.c.

References _getenv_static_from(), kern_envp, md_envp, and name.

Referenced by kenv_acquire(), and kern_getenv().

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◆ _getenv_static_from()

static char * _getenv_static_from	(	char *	chkenv,
		const char *	name
	)

static

Definition at line 489 of file kern_environment.c.

References kernenv_next(), and name.

Referenced by _getenv_static().

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◆ freeenv()

void freeenv ( char * env )

Definition at line 450 of file kern_environment.c.

References dynamic_kenv, and kenv_zone.

Referenced by getenv_bool(), parse_dir_ask_printenv(), start_init(), sys_kenv(), sysctl_load_tunable_by_oid_locked(), and vfs_mountroot_conf0().

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◆ getenv_array()

int getenv_array	(	const char *	name,
		void *	pdata,
		int	size,
		int *	psize,
		int	type_size,
		bool	allow_signed
	)

Definition at line 719 of file kern_environment.c.

References buf, kenv_acquire(), kenv_release(), name, and value.

Referenced by sysctl_load_tunable_by_oid_locked().

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◆ getenv_bool()

int getenv_bool	(	const char *	name,
		bool *	data
	)

Definition at line 993 of file kern_environment.c.

References data, freeenv(), kern_getenv(), name, and printf().

Referenced by getenv_is_false(), and getenv_is_true().

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◆ getenv_int()

int getenv_int	(	const char *	name,
		int *	data
	)

Definition at line 858 of file kern_environment.c.

References data, getenv_quad(), and name.

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◆ getenv_int64()

int getenv_int64	(	const char *	name,
		int64_t *	data
	)

Definition at line 888 of file kern_environment.c.

References data, getenv_quad(), and name.

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◆ getenv_is_false()

bool getenv_is_false ( const char * name )

Definition at line 1038 of file kern_environment.c.

References getenv_bool(), and name.

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◆ getenv_is_true()

bool getenv_is_true ( const char * name )

Definition at line 1025 of file kern_environment.c.

References getenv_bool(), and name.

Referenced by init_static_kenv().

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◆ getenv_long()

int getenv_long	(	const char *	name,
		long *	data
	)

Definition at line 918 of file kern_environment.c.

References data, getenv_quad(), and name.

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◆ getenv_quad()

int getenv_quad	(	const char *	name,
		quad_t *	data
	)

Definition at line 948 of file kern_environment.c.

References data, kenv_acquire(), kenv_release(), name, and value.

Referenced by getenv_int(), getenv_int64(), getenv_long(), getenv_uint(), getenv_uint64(), and getenv_ulong().

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◆ getenv_string()

int getenv_string	(	const char *	name,
		char *	data,
		int	size
	)

Definition at line 701 of file kern_environment.c.

References data, kenv_acquire(), kenv_release(), and name.

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◆ getenv_uint()

int getenv_uint	(	const char *	name,
		unsigned int *	data
	)

Definition at line 873 of file kern_environment.c.

References data, getenv_quad(), and name.

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◆ getenv_uint64()

int getenv_uint64	(	const char *	name,
		uint64_t *	data
	)

Definition at line 903 of file kern_environment.c.

References data, getenv_quad(), and name.

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◆ getenv_ulong()

int getenv_ulong	(	const char *	name,
		unsigned long *	data
	)

Definition at line 933 of file kern_environment.c.

References data, getenv_quad(), and name.

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◆ init_dynamic_kenv()

static void init_dynamic_kenv ( void *data __unused )

static

Definition at line 425 of file kern_environment.c.

References dynamic_kenv, init_dynamic_kenv_from(), kenv_lock, kenv_mvallen, KENV_SIZE, kenv_zone, kenvp, kern_envp, malloc(), and md_envp.

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◆ init_dynamic_kenv_from()

static void init_dynamic_kenv_from	(	char *	init_env,
		int *	curpos
	)

static

Definition at line 364 of file kern_environment.c.

References _getenv_dynamic_locked(), kenv_mvallen, KENV_SIZE, kenvp, kernenv_next(), malloc(), and printf().

Referenced by init_dynamic_kenv().

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◆ init_static_kenv()

void init_static_kenv	(	char *	buf,
		size_t	len
	)

Definition at line 298 of file kern_environment.c.

References buf, dynamic_kenv, getenv_is_true(), kern_envp, md_env_len, md_env_pos, and md_envp.

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◆ kenv_acquire()

static char * kenv_acquire ( const char * name )

static

Definition at line 673 of file kern_environment.c.

References _getenv_dynamic(), _getenv_static(), dynamic_kenv, kenv_lock, name, and value.

Referenced by getenv_array(), getenv_quad(), getenv_string(), and testenv().

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◆ kenv_dump()

static int kenv_dump	(	struct thread *	td,
		char **	envp,
		int	what,
		char *	value,
		int	len
	)

static

Definition at line 96 of file kern_environment.c.

References free(), kenv_lock, kenv_mvallen, KENV_SIZE, kernenv_next(), malloc(), and value.

Referenced by sys_kenv().

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◆ kenv_release()

static void kenv_release ( const char * buf )

static

Definition at line 691 of file kern_environment.c.

References buf, dynamic_kenv, and kenv_lock.

Referenced by getenv_array(), getenv_quad(), getenv_string(), and testenv().

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◆ kern_getenv()

char * kern_getenv ( const char * name )

Definition at line 528 of file kern_environment.c.

References _getenv_dynamic(), _getenv_static(), dynamic_kenv, kenv_lock, kenv_mvallen, kenv_zone, and name.

Referenced by getenv_bool(), parse_dir_ask_printenv(), start_init(), sys_kenv(), sysctl_load_tunable_by_oid_locked(), and vfs_mountroot_conf0().

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◆ kern_setenv()

int kern_setenv	(	const char *	name,
		const char *	value
	)

Definition at line 596 of file kern_environment.c.

References _getenv_dynamic(), buf, dynamic_kenv, free(), KENV_CHECK, kenv_lock, kenv_mvallen, KENV_SIZE, kenvp, malloc(), md_env_len, name, setenv_static(), sprintf(), and value.

Referenced by static_hints_to_env(), and sys_kenv().

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◆ kern_unsetenv()

int kern_unsetenv ( const char * name )

Definition at line 645 of file kern_environment.c.

References _getenv_dynamic(), KENV_CHECK, kenv_lock, kenvp, name, and zfree().

Referenced by resource_unset_value(), start_init(), and sys_kenv().

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◆ kernenv_next()

static char * kernenv_next ( char * cp )

static

Definition at line 1052 of file kern_environment.c.

Referenced by _getenv_static_from(), init_dynamic_kenv_from(), and kenv_dump().

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◆ MALLOC_DEFINE()

static MALLOC_DEFINE	(	M_KENV	,
		"kenv"	,
		"kernel environment"
	)

static

◆ setenv_static()

static int setenv_static	(	const char *	name,
		const char *	value
	)

static

Definition at line 573 of file kern_environment.c.

References md_env_len, md_env_pos, md_envp, name, sprintf(), and value.

Referenced by kern_setenv().

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◆ sys_kenv()

int sys_kenv	(	struct thread *	td,
		struct kenv_args *	uap
	)

Definition at line 160 of file kern_environment.c.

References dynamic_kenv, free(), freeenv(), kenv_dump(), kenv_mvallen, kenvp, kern_envp, kern_getenv(), kern_setenv(), kern_unsetenv(), malloc(), md_envp, name, priv_check(), and value.

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◆ SYSINIT()

SYSINIT	(	kenv	,
		SI_SUB_KMEM+	1,
		SI_ORDER_FIRST	,
		init_dynamic_kenv	,
		NULL
	)

◆ testenv()

int testenv ( const char * name )

Definition at line 555 of file kern_environment.c.

References kenv_acquire(), kenv_release(), and name.

Referenced by static_hints_to_env().

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◆ tunable_bool_init()

void tunable_bool_init ( void * data )

Definition at line 1114 of file kern_environment.c.

References data.

◆ tunable_int64_init()

void tunable_int64_init ( void * data )

Definition at line 1090 of file kern_environment.c.

References data.

◆ tunable_int_init()

void tunable_int_init ( void * data )

Definition at line 1066 of file kern_environment.c.

References data.

◆ tunable_long_init()

void tunable_long_init ( void * data )

Definition at line 1074 of file kern_environment.c.

References data.

◆ tunable_quad_init()

void tunable_quad_init ( void * data )

Definition at line 1106 of file kern_environment.c.

References data.

◆ tunable_str_init()

void tunable_str_init ( void * data )

Definition at line 1122 of file kern_environment.c.

References data.

◆ tunable_uint64_init()

void tunable_uint64_init ( void * data )

Definition at line 1098 of file kern_environment.c.

References data.

◆ tunable_ulong_init()

void tunable_ulong_init ( void * data )

Definition at line 1082 of file kern_environment.c.

References data.

Variable Documentation

◆ dynamic_kenv

bool dynamic_kenv

Definition at line 90 of file kern_environment.c.

Referenced by freeenv(), init_dynamic_kenv(), init_static_kenv(), kenv_acquire(), kenv_release(), kern_getenv(), kern_setenv(), and sys_kenv().

◆ kenv_lock

struct mtx kenv_lock

Definition at line 85 of file kern_environment.c.

Referenced by _getenv_dynamic(), init_dynamic_kenv(), kenv_acquire(), kenv_dump(), kenv_release(), kern_getenv(), kern_setenv(), kern_unsetenv(), and res_find().

◆ kenv_mvallen

int kenv_mvallen = KENV_MVALLEN

static

Definition at line 71 of file kern_environment.c.

Referenced by init_dynamic_kenv(), init_dynamic_kenv_from(), kenv_dump(), kern_getenv(), kern_setenv(), and sys_kenv().

◆ kenv_zone

uma_zone_t kenv_zone

static

Definition at line 70 of file kern_environment.c.

Referenced by freeenv(), init_dynamic_kenv(), and kern_getenv().

◆ kenvp

char** kenvp

Definition at line 84 of file kern_environment.c.

Referenced by _getenv_dynamic_locked(), init_dynamic_kenv(), init_dynamic_kenv_from(), kern_setenv(), kern_unsetenv(), res_find(), and sys_kenv().

◆ kern_envp

char* kern_envp

Definition at line 74 of file kern_environment.c.

Referenced by _getenv_static(), init_dynamic_kenv(), init_static_kenv(), res_find(), and sys_kenv().

◆ md_env_len

int md_env_len

static

Definition at line 78 of file kern_environment.c.

Referenced by init_static_kenv(), kern_setenv(), and setenv_static().

◆ md_env_pos

int md_env_pos

static

Definition at line 79 of file kern_environment.c.

Referenced by init_static_kenv(), and setenv_static().

◆ md_envp

char* md_envp

Definition at line 77 of file kern_environment.c.

Referenced by _getenv_static(), init_dynamic_kenv(), init_static_kenv(), res_find(), setenv_static(), and sys_kenv().

Macros

Functions

Variables

Macro Definition Documentation

◆ KENV_CHECK

◆ KENV_SIZE

Function Documentation

◆ __FBSDID()

◆ _getenv_dynamic()

◆ _getenv_dynamic_locked()

◆ _getenv_static()

◆ _getenv_static_from()

◆ freeenv()

◆ getenv_array()

◆ getenv_bool()

◆ getenv_int()

◆ getenv_int64()

◆ getenv_is_false()

◆ getenv_is_true()

◆ getenv_long()

◆ getenv_quad()

◆ getenv_string()

◆ getenv_uint()

◆ getenv_uint64()

◆ getenv_ulong()

◆ init_dynamic_kenv()

◆ init_dynamic_kenv_from()

◆ init_static_kenv()

◆ kenv_acquire()

◆ kenv_dump()

◆ kenv_release()

◆ kern_getenv()

◆ kern_setenv()

◆ kern_unsetenv()

◆ kernenv_next()

◆ MALLOC_DEFINE()

◆ setenv_static()

◆ sys_kenv()

◆ SYSINIT()

◆ testenv()

◆ tunable_bool_init()

◆ tunable_int64_init()

◆ tunable_int_init()

◆ tunable_long_init()

◆ tunable_quad_init()

◆ tunable_str_init()

◆ tunable_uint64_init()

◆ tunable_ulong_init()

Variable Documentation

◆ dynamic_kenv

◆ kenv_lock

◆ kenv_mvallen

◆ kenv_zone

◆ kenvp

◆ kern_envp

◆ md_env_len

◆ md_env_pos

◆ md_envp