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-.\" $FreeBSD$
-.\"
-.Dd July 26, 2016
-.Dt DNV 9
-.Os
-.Sh NAME
-.Nm dnvlist_get,
-.Nm dnvlist_take,
-.Nd "API for getting name/value pairs. Nonexistent pairs do not raise an error."
-.Sh LIBRARY
-.Lb libnv
-.Sh SYNOPSIS
-.In sys/dnv.h
-.Ft bool
-.Fn dnvlist_get_bool "const nvlist_t *nvl" "const char *name" "bool defval"
-.Ft uint64_t
-.Fn dnvlist_get_number "const nvlist_t *nvl" "const char *name" "uint64_t defval"
-.Ft char *
-.Fn dnvlist_get_string "const nvlist_t *nvl" "const char *name" "const char *defval"
-.Ft nvlist_t *
-.Fn dnvlist_get_nvlist "const nvlist_t *nvl" "const char *name" "nvlist_t *defval"
-.Ft int
-.Fn dnvlist_get_descriptor "const nvlist_t *nvl" "const char *name" "int defval"
-.Ft void *
-.Fn dnvlist_get_binary "const nvlist_t *nvl" "const char *name" "size_t *sizep" "void *defval" "size_t defsize"
-.Ft bool
-.Fn dnvlist_take_bool "const nvlist_t *nvl" "const char *name" "bool defval"
-.Ft uint64_t
-.Fn dnvlist_take_number "const nvlist_t *nvl" "const char *name" "uint64_t defval"
-.Ft char *
-.Fn dnvlist_take_string "const nvlist_t *nvl" "const char *name" "const char *defval"
-.Ft nvlist_t *
-.Fn dnvlist_take_nvlist "const nvlist_t *nvl" "const char *name" "nvlist_t *defval"
-.Ft int
-.Fn dnvlist_take_descriptor "const nvlist_t *nvl" "const char *name" "int defval"
-.Ft void *
-.Fn dnvlist_take_binary "const nvlist_t *nvl" "const char *name" "size_t *sizep" "void *defval" "size_t defsize"
-.Sh DESCRIPTION
-The
-.Nm libnv
-library permits easy management of name/value pairs and can send and receive
-them over sockets.
-For more information, also see
-.Xr nv 9 .
-.Pp
-The
-.Nm dnvlist_get
-family of functions returns the value associated with the specified name.
-If an element of the specified name does not exist, the function returns the
-value provided in defval.
-Returned strings, nvlists, descriptors, binaries, or arrays must not be modified
-by the user.
-They still belong to the nvlist.
-If the nvlist is in an error state, attempts to use any of these functions will
-cause the program to abort.
-.Pp
-The
-.Nm dnvlist_take
-family of functions returns the value associated with the specified name and
-removes the element from the nvlist.
-If an element of the supplied name does not exist, the value provided in
-.Nm defval
-is returned.
-When the value is a string, binary, or array value, the caller is
-responsible for freeing returned memory with
-.Fn free 3 .
-When the value is an nvlist, the caller is responsible for destroying the
-returned nvlist with
-.Fn nvlist_destroy .
-When the value is a descriptor, the caller is responsible for closing the
-returned descriptor with
-.Fn close 2 .
-.Sh SEE ALSO
-.Xr close 2 ,
-.Xr free 3
-.Xr nv 9 ,
-.Sh AUTHORS
-.An -nosplit
-The
-.Nm dnv
-API was implemented by
-.An Pawel Jakub Dawidek Aq Mt pawel@dawidek.net
-under sponsorship from the FreeBSD Foundation.