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.\" $FreeBSD: head/lib/libc/locale/nl_langinfo.3 238919 2012-07-30 20:56:19Z issyl0 $
.\"
.Dd July 30, 2012
.Dt NL_LANGINFO 3
.Os
.Sh NAME
.Nm nl_langinfo
.Nd language information
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In langinfo.h
.Ft char *
.Fn nl_langinfo "nl_item item"
.Ft char *
.Fn nl_langinfo_l "nl_item item" "locale_t loc"
.Sh DESCRIPTION
The
.Fn nl_langinfo
function returns a pointer to a string containing information relevant to
the particular language or cultural area defined in the program or thread's
locale, or in the case of
.Fn nl_langinfo_l ,
the locale passed as the second argument.
The manifest constant names and values of
.Fa item
are defined in
.In langinfo.h .
.Pp
Calls to
.Fn setlocale
with a category corresponding to the category of
.Fa item ,
or to the
category
.Dv LC_ALL ,
may overwrite the buffer pointed to by the return value.
.Sh RETURN VALUES
In a locale where langinfo data is not defined,
.Fn nl_langinfo
returns a pointer to the corresponding string in the
.Tn POSIX
locale.
.Fn nl_langinfo_l
returns the same values as
.Fn nl_langinfo .
In all locales,
.Fn nl_langinfo
returns a pointer to an empty string if
.Fa item
contains an invalid setting.
.Sh EXAMPLES
For example:
.Pp
.Dl nl_langinfo(ABDAY_1)
.Pp
would return a pointer to the string
.Qq Li Dom
if the identified language was
Portuguese, and
.Qq Li Sun
if the identified language was English.
.Sh SEE ALSO
.Xr setlocale 3
.Sh STANDARDS
The
.Fn nl_langinfo
function conforms to
.St -susv2 .
The
.Fn nl_langinfo_l
function conforms to
.St -p1003.1-2008 .
.Sh HISTORY
The
.Fn nl_langinfo
function first appeared in
.Fx 4.6 .