NVLIST_LOOKUP_NVPAIR(9F) Kernel Functions for Drivers

NAME

nvlist_lookup_nvpair, nvlist_exists - lookup named pairs

SYNOPSIS

#include <libnvpair.h>

int nvlist_lookup_nvpair(nvlist_t *nvl, const char *name,
nvpair_t **nvp);


boolean_t nvlist_exists(nvlist_t *nvl, const char *name);

DESCRIPTION

The nvlist_lookup_nvpair() function returns the nvpair with the
matching name, regardless of type. It is valid only for lists
allocated with NV_UNIQUE_NAME. See nvlist_alloc(9F).


The nvlist_exists() function returns success if any nvpair exists
with the given name. It is valid for all types of lists.

RETURN VALUES

The nvlist_lookup_nvpair() function returns 0 on success and an error
value on failure.


The nvlist_exists() function returns B_TRUE if an nvpair with the
given name exists and B_FALSE otherwise.

ERRORS

The nvlist_lookup_nvpair() function will fail if:

EINVAL
There is an invalid argument.


ENOENT
No matching name-value pair is found.


ENOTSUP
The list was not allocated with NV_UNIQUE_NAME.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Committed |
+--------------------+-----------------+

SEE ALSO

nvlist_lookup_nvpair(3NVPAIR), attributes(7), nvlist_alloc(9F)

October 24, 2007 NVLIST_LOOKUP_NVPAIR(9F)