nvlist_lookup_boolean(9F) Kernel Functions for Drivers nvlist_lookup_boolean(9F)
NAME
nvlist_lookup_boolean, nvlist_lookup_boolean_value, nvlist_lookup_byte, nvlist_lookup_int8, nvlist_lookup_int16, nvlist_lookup_int32,
nvlist_lookup_int64, nvlist_lookup_uint8, nvlist_lookup_uint16, nvlist_lookup_uint32, nvlist_lookup_uint64, nvlist_lookup_string,
nvlist_lookup_nvlist, nvlist_lookup_boolean_array, nvlist_lookup_byte_array, nvlist_lookup_int8_array, nvlist_lookup_int16_array,
nvlist_lookup_int32_array, nvlist_lookup_int64_array, nvlist_lookup_uint8_array, nvlist_lookup_uint16_array, nvlist_lookup_uint32_array,
nvlist_lookup_uint64_array, nvlist_lookup_string_array, nvlist_lookup_nvlist_array, nvlist_lookup_pairs - match name and type indicated by
the interface name and retrieve data value
SYNOPSIS
#include <sys/nvpair.h>
int nvlist_lookup_boolean(nvlist_t *nvl, const char *name);
int nvlist_lookup_boolean_value(nvlist_t *nvl, const char *name, boolean_t *val);
int nvlist_lookup_byte(nvlist_t *nvl, const char *name, uchar_t *val);
int nvlist_lookup_int8(nvlist_t *nvl, const char *name, int8_t *val);
int nvlist_lookup_uint8(nvlist_t *nvl, const char *name, uint8_t *val);
int nvlist_lookup_int16(nvlist_t *nvl, const char *name, int16_t *val);
int nvlist_lookup_uint16(nvlist_t *nvl, const char *name, uint16_t *val);
int nvlist_lookup_int32(nvlist_t *nvl, const char *name, int32_t *val);
int nvlist_lookup_uint32(nvlist_t *nvl, const char *name, uint32_t *val);
int nvlist_lookup_int64(nvlist_t *nvl, const char *name, int64_t *val);
int nvlist_lookup_uint64(nvlist_t *nvl, const char *name, uint64_t *val);
int nvlist_lookup_string(nvlist_t *nvl, const char *name, char **val);
int nvlist_lookup_nvlist(nvlist_t *nvl, const char *name, nvlist_t **val);
int nvlist_lookup_boolean_array(nvlist_t *nvl, const char *name, boolean_t **val, uint_t *nelem);
int nvlist_lookup_byte_array(nvlist_t *nvl, const char *name, uchar_t **val, uint_t *nelem);
int nvlist_lookup_int8_array(nvlist_t *nvl, const char *name, int8_t **val, uint_t *nelem);
int nvlist_lookup_uint8_array(nvlist_t *nvl, const char *name, uint8_t **val, uint_t *nelem);
int nvlist_lookup_int16_array(nvlist_t *nvl, const char *name, int16_t **val, uint_t *nelem);
int nvlist_lookup_uint16_array(nvlist_t *nvl, const char *name, uint16_t **val, uint_t *nelem);
int nvlist_lookup_int32_array(nvlist_t *nvl, const char *name, int32_t **val, uint_t *nelem);
int nvlist_lookup_uint32_array(nvlist_t *nvl, const char *name, uint32_t **val, uint_t *nelem);
int nvlist_lookup_int64_array(nvlist_t *nvl, const char *name, int64_t **val, uint_t *nelem);
int nvlist_lookup_uint64_array(nvlist_t *nvl, const char *name, uint64_t **val, uint_t *nelem);
int nvlist_lookup_string_array(nvlist_t *nvl, const char *name, char ***val, uint_t *nelem);
int nvlist_lookup_nvlist_array(nvlist_t *nvl, const char *name, nvlist_t ***val, uint_t *nelem);
int nvlist_lookup_pairs(nvlist_t *nvl, int flag, ...);
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI)
PARAMETERS
nvl The list of name-value pairs (nvlist_t) to be processed.
name Name of the name-value pair (nvpair) to search.
nelem Address to store the number of elements in value.
val Address to store the value or starting address of the array value.
flag Specify bit fields defining lookup behavior:
NV_FLAG_NOENTOK
The retrival function will not fail if no matching name-value pair is found.
DESCRIPTION
These functions find the nvpair that matches the name and type as indicated by the interface name. If one is found, nelem and val are modi-
fied to contain the number of elements in value and the starting address of data, respectively.
These interfaces work for nvlist_t allocated with NV_UNIQUE_NAME or NV_UNIQUE_NAME_TYPE specified in nvlist_alloc(). (See
nvlist_alloc(9F).) If this is not the case, the interface will return ENOTSUP because the list potentially contains multiple nvpairs with
the same name and type.
Multiple threads can simultaneously read the same nvlist_t but only one thread may actively change a given nvlist_t at a time. The caller
is responsible for the synchronization.
All memory required for storing the array elements, including string values, are managed by the library. References to such data remain
valid until nvlist_free() is called on nvl.
The nvlist_lookup_pairs() function retrieves a set of nvpairs. The arguments are a null-terminated list of pairs (data type DATA_TYPE_BOOL-
EAN), triples (non array data types) or quads (array data types). The interpretation of the arguments depends on the value of type (see
nvpair_type.9f) as follows:
name Name of the name-value pair to search.
type Data type. (See nvpair_type.9f).
val Address to store the starting address of the value. When using data type DATA_TYPE_BOOLEAN, the val argument is to omit.
nelem Address to store the number of elements in value. Non array data types have only one argument and nelem is to omit.
Argument order is name, type, [val], [nelem].
When using NV_FLAG_NOENTOK and no matching name-value pair is found, the memory pointed by val and nelem won't be touched.
These functions return 0 on success and an error value on failure.
ERRORS
These functions fail if:
0 Success
EINVAL Invalid argument
ENOENT No matching name-value pair found
ENOTSUP Encode/decode method not supported
CONTEXT
These functions can be called from user or interrupt contexts.
SunOS 5.10 3 Feb 2004 nvlist_lookup_boolean(9F)