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



NAME
       nl_langinfo - query language and locale information

SYNOPSIS
       #include <langinfo.h>

       char *nl_langinfo(nl_item item);

DESCRIPTION
       The nl_langinfo() function provides access to locale information in a more flexible
       way than localeconv(3) does.  Individual and additional elements of the locale cat-
       egories 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 character 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 strftime(3) to rep-
              resent time and date in a locale-specific way.

       D_FMT (LC_TIME)
              Return a string that can be used as a format string for strftime(3) to  rep-
              resent a date in a locale-specific way.

       T_FMT (LC_TIME)
              Return  a string that can be used as a format string for strftime(3) to rep-
              resent 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  con-
              vention  DAY_1  =  Sunday,  not the international convention (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 digits).

       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 character.

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

RETURN VALUE
       If  no locale has been selected for the appropriate category, nl_langinfo() returns
       a pointer to the corresponding string in the "C" locale.

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

       This pointer may point to static data that may be overwritten on the next  call  to
       nl_langinfo() or setlocale(3).

       Codeset  for  en_US defaults to ISO-8859-1 (Latin-1).  The Latin-1 default has his-
       torical reasons, since all Unix systems originally used only 8-bit character encod-
       ing.  For more information about ISO-8859-1 see charsets(7).


CONFORMING TO
       SUSv2, POSIX.1-2001.

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 3.22 of the Linux man-pages project.  A description of
       the project, and information about reporting bugs, can be found at  http://www.ker-
       nel.org/doc/man-pages/.



GNU                               2001-05-11                    NL_LANGINFO(3)

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