Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

nvlist_exists(3nvpair) [opensolaris man page]

nvlist_lookup_nvpair(3NVPAIR)				 Name-value Pair Library Functions			     nvlist_lookup_nvpair(3NVPAIR)

nvlist_lookup_nvpair, nvlist_exists - 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); 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. 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(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
libnvpair(3LIB), nvlist_alloc(3NVPAIR), attributes(5), nvlist_lookup_nvpair(9F) SunOS 5.11 24 Oct 2007 nvlist_lookup_nvpair(3NVPAIR)

Check Out this Related Man Page

nvlist_next_nvpair(3NVPAIR)				 Name-value Pair Library Functions			       nvlist_next_nvpair(3NVPAIR)

nvlist_next_nvpair, nvpair_name, nvpair_type - return data regarding name-value pairs SYNOPSIS
cc [ flag... ] file... -lnvpair [ library... ] #include <libnvpair.h> nvpair_t *nvlist_next_nvpair(nvlist_t *nvl, nvpair_t *nvpair); char *nvpair_name(nvpair_t *nvpair); data_type_t nvpair_type(nvpair_t *nvpair); PARAMETERS
nvl The nvlist_t to be processed. nvpair Handle to a name-value pair. DESCRIPTION
The nvlist_next_nvpair() function returns a handle to the next nvpair in the list following nvpair. If nvpair is NULL, the first pair is returned. If nvpair is the last pair in the nvlist, NULL is returned. The nvpair_name() function returns a string containing the name of nvpair. The nvpair_type() function retrieves the value of the nvpair in the form of enumerated type data_type_t. This is used to determine the appropriate nvpair_*() function to call for retrieving the value. RETURN VALUES
Upon successful completion, nvpair_name() returns a string containing the name of the name-value pair. Upon successful completion, nvpair_type() returns an enumerated data type data_type_t. Possible values for data_type_t are as follows: DATA_TYPE_BOOLEAN DATA_TYPE_BOOLEAN_VALUE DATA_TYPE_BYTE DATA_TYPE_INT8 DATA_TYPE_UINT8 DATA_TYPE_INT16 DATA_TYPE_UINT16 DATA_TYPE_INT32 DATA_TYPE_UINT32 DATA_TYPE_INT64 DATA_TYPE_UINT64 DATA_TYPE_STRING DATA_TYPE_NVLIST DATA_TYPE_BOOLEAN_ARRAY DATA_TYPE_BYTE_ARRAY DATA_TYPE_INT8_ARRAY DATA_TYPE_UINT8_ARRAY DATA_TYPE_INT16_ARRAY DATA_TYPE_UINT16_ARRAY DATA_TYPE_INT32_ARRAY DATA_TYPE_UINT32_ARRAY DATA_TYPE_INT64_ARRAY DATA_TYPE_UINT64_ARRAY DATA_TYPE_STRING_ARRAY DATA_TYPE_NVLIST_ARRAY Upon reaching the end of a list, nvlist_next_pair() returns NULL. Otherwise, the function returns a handle to next nvpair in the list. These and other libnvpair(3LIB) functions cannot manipulate nvpairs after they have been removed from or replaced in an nvlist. Replacement can occur during pair additions to nvlists created with NV_UNIQUE_NAME_TYPE and NV_UNIQUE_NAME. See nvlist_alloc(3NVPAIR). ERRORS
No errors are defined. EXAMPLES
Example 1: Example of usage of nvlist_next_nvpair(). /* * usage of nvlist_next_nvpair() */ static int edit_nvl(nvlist_t *nvl) { nvpair_t *curr = nvlist_next_nvpair(nvl, NULL); while (curr != NULL) { int err; nvpair_t *next = nvlist_next_nvpair(nvl, curr); if (!nvl_check(curr)) if ((err = nvlist_remove(nvl, nvpair_name(curr), nvpair_type(curr))) != 0) return (err); curr = next; } return(0); } ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +----------------------------+------------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +----------------------------+------------------------------+ |Interface Stability | Evolving | +----------------------------+------------------------------+ |MT-Level | MT-Safe | +----------------------------+------------------------------+ SEE ALSO
libnvpair(3LIB), nvlist_alloc(3NVPAIR), attributes(5) NOTES
The enumerated nvpair data types might not be an exhaustive list and new data types can be added. An application using the data type enu- meration, data_type_t, should be written to expect or ignore new data types. SunOS 5.10 2 Feb 2004 nvlist_next_nvpair(3NVPAIR)
Man Page

Featured Tech Videos