NL_LANGINFO(3)		   Linux Programmer's Manual		NL_LANGINFO(3)



NAME
       nl_langinfo, nl_langinfo_l - query language and locale information

SYNOPSIS
       #include <langinfo.h>

       char *nl_langinfo(nl_item item);

       char *nl_langinfo_l(nl_item item, locale_t locale);

DESCRIPTION
       The  nl_langinfo()  and	nl_langinfo_l()	 functions  provide  access to
       locale information in a more flexible way than localeconv(3).  nl_lang-
       info() returns a string which is the value corresponding to item in the
       program's current global locale.	 nl_langinfo() returns a string	 which
       is  the	value  corresponding  to item for the locale identified by the
       locale object locale, which was	previously  created  by	 newlocale(1).
       Individual  and	additional  elements  of  the locale categories can be
       queried.

       Examples for the locale elements that can be specified  in  item	 using
       the constants defined in <langinfo.h> are:

       CODESET (LC_CTYPE)
	      Return  a string with the name of the character encoding used in
	      the  selected  locale,  such  as	 "UTF-8",   "ISO-8859-1",   or
	      "ANSI_X3.4-1968"	(better	 known as US-ASCII).  This is the same
	      string that you get with "locale charmap".  For a list of	 char-
	      acter encoding names, try "locale -m", cf. locale(1).

       D_T_FMT (LC_TIME)
	      Return  a	 string	 that can be used as a format string for strf-
	      time(3) to represent time and date in a locale-specific way.

       D_FMT (LC_TIME)
	      Return a string that can be used as a format  string  for	 strf-
	      time(3) to represent a date in a locale-specific way.

       T_FMT (LC_TIME)
	      Return  a	 string	 that can be used as a format string for strf-
	      time(3) to represent a time in a locale-specific way.

       DAY_{1-7} (LC_TIME)
	      Return name of the n-th day of the week. [Warning: this  follows
	      the  US convention DAY_1 = Sunday, not the international conven-
	      tion (ISO 8601) that Monday is the first day of the week.]

       ABDAY_{1-7} (LC_TIME)
	      Return abbreviated name of the n-th day of the week.

       MON_{1-12} (LC_TIME)
	      Return name of the n-th month.

       ABMON_{1-12} (LC_TIME)
	      Return abbreviated name of the n-th month.

       RADIXCHAR (LC_NUMERIC)
	      Return radix character (decimal dot, decimal comma, etc.).

       THOUSEP (LC_NUMERIC)
	      Return separator character for thousands (groups of  three  dig-
	      its).

       YESEXPR (LC_MESSAGES)
	      Return  a	 regular expression that can be used with the regex(3)
	      function to recognize a positive response to a yes/no question.

       NOEXPR (LC_MESSAGES)
	      Return a regular expression that can be used with	 the  regex(3)
	      function to recognize a negative response to a yes/no question.

       CRNCYSTR (LC_MONETARY)
	      Return the currency symbol, preceded by "-" if the symbol should
	      appear before the value, "+" if the symbol should	 appear	 after
	      the value, or "." if the symbol should replace the radix charac-
	      ter.

       The above  list	covers	just  some  examples  of  items	 that  can  be
       requested.   For a more detailed list, consult The GNU C Library Refer-
       ence Manual.

RETURN VALUE
       On success, these functions return a pointer to a string which  is  the
       value corresponding to item in the specified locale.

       If no locale has been selected by setlocale(3) for the appropriate cat-
       egory, nl_langinfo() return a pointer to the  corresponding  string  in
       the  "C"	 locale.  The same is true of nl_langinfo_l() if locale speci-
       fies a locale where langinfo data is not defined.

       If item is not valid, a pointer to an empty string is returned.

       The pointer returned by these functions may point to static  data  that
       may be overwritten, or the pointer itself may be invalidated, by a sub-
       sequent call to nl_langinfo(), nl_langinfo_l(), or  setlocale(3).   The
       same  statements apply to nl_langinfo_l() if the locale object referred
       to by locale is freed or modified by freelocale(3) or newlocale(3).

       POSIX specifies that the application may not modify the string returned
       by these functions.

ATTRIBUTES
       For   an	  explanation	of   the  terms	 used  in  this	 section,  see
       attributes(7).

       +--------------+---------------+----------------+
       |Interface     | Attribute     | Value	       |
       +--------------+---------------+----------------+
       |nl_langinfo() | Thread safety | MT-Safe locale |
       +--------------+---------------+----------------+
CONFORMING TO
       POSIX.1-2001, POSIX.1-2008, SUSv2.

NOTES
       The behavior of nl_langinfo_l() is undefined if locale is  the  special
       locale object LC_GLOBAL_LOCALE or is not a valid locale object handle.

EXAMPLE
       The  following  program	sets the character type and the numeric locale
       according to the environment and queries the terminal character set and
       the radix character.

       #include <langinfo.h>
       #include <locale.h>
       #include <stdio.h>
       #include <stdlib.h>

       int
       main(int argc, char *argv[])
       {
	   setlocale(LC_CTYPE, "");
	   setlocale(LC_NUMERIC, "");

	   printf("%s\n", nl_langinfo(CODESET));
	   printf("%s\n", nl_langinfo(RADIXCHAR));

	   exit(EXIT_SUCCESS);
       }

SEE ALSO
       locale(1), localeconv(3), setlocale(3), charsets(7), locale(7)
       The GNU C Library Reference Manual

COLOPHON
       This  page  is  part of release 4.10 of the Linux man-pages project.  A
       description of the project, information about reporting bugs,  and  the
       latest	  version     of     this    page,    can    be	   found    at
       https://www.kernel.org/doc/man-pages/.



GNU				  2015-07-31			NL_LANGINFO(3)