setlocale man page on FreeBSD

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SETLOCALE(3)		 BSD Library Functions Manual		  SETLOCALE(3)

NAME
     setlocale — natural language formatting for C

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <locale.h>

     char *
     setlocale(int category, const char *locale);

DESCRIPTION
     The setlocale() function sets the C library's notion of natural language
     formatting style for particular sets of routines.	Each such style is
     called a ‘locale’ and is invoked using an appropriate name passed as a C
     string.

     The setlocale() function recognizes several categories of routines.
     These are the categories and the sets of routines they select:

     LC_ALL	  Set the entire locale generically.

     LC_COLLATE	  Set a locale for string collation routines.  This controls
		  alphabetic ordering in strcoll() and strxfrm().

     LC_CTYPE	  Set a locale for the ctype(3) and multibyte(3) functions.
		  This controls recognition of upper and lower case, alpha‐
		  betic or non-alphabetic characters, and so on.

     LC_MESSAGES  Set a locale for message catalogs, see catopen(3) function.

     LC_MONETARY  Set a locale for formatting monetary values; this affects
		  the localeconv() function.

     LC_NUMERIC	  Set a locale for formatting numbers.	This controls the for‐
		  matting of decimal points in input and output of floating
		  point numbers in functions such as printf() and scanf(), as
		  well as values returned by localeconv().

     LC_TIME	  Set a locale for formatting dates and times using the
		  strftime() function.

     Only three locales are defined by default, the empty string "" which
     denotes the native environment, and the "C" and "POSIX" locales, which
     denote the C language environment.	 A locale argument of NULL causes
     setlocale() to return the current locale.	By default, C programs start
     in the "C" locale.	 The only function in the library that sets the locale
     is setlocale(); the locale is never changed as a side effect of some
     other routine.

RETURN VALUES
     Upon successful completion, setlocale() returns the string associated
     with the specified category for the requested locale.  The setlocale()
     function returns NULL and fails to change the locale if the given combi‐
     nation of category and locale makes no sense.

FILES
     $PATH_LOCALE/locale/category
     /usr/share/locale/locale/category	locale file for the locale locale and
					the category category.

ERRORS
     No errors are defined.

SEE ALSO
     colldef(1), mklocale(1), catopen(3), ctype(3), localeconv(3),
     multibyte(3), strcoll(3), strxfrm(3), euc(5), utf8(5), environ(7)

STANDARDS
     The setlocale() function conforms to ISO/IEC 9899:1999 (“ISO C99”).

HISTORY
     The setlocale() function first appeared in 4.4BSD.

BSD			       November 21, 2003			   BSD
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