NAME

nvlist_lookup_nvpair, nvlist_exists, nvlist_empty - lookup named pairs

SYNOPSIS

cc [ flag... ] file... -lnvpair [ library... ]
#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);

boolean_t nvlist_empty(nvlist_t *nvl);

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(3NVPAIR).

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

The nvlist_empty() function returns success if the list nvl contains no nvpairs. 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.

The nvlist_empty() function returns B_TRUE if the given list, nvl, contains no nvpairs 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
MT-Level	MT-Safe