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Man Pages


Manual Reference Pages  -  SETLOCALE (3)

NAME

setlocale - natural language formatting for C

CONTENTS

Library
Synopsis
Description
Return Values
Files
Errors
See Also
Standards
History

LIBRARY


.Lb libc

SYNOPSIS


.In 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, alphabetic 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 formatting 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 combination 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 -isoC-99.

HISTORY

The setlocale function first appeared in BSD 4.4 .
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