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uselocale

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

NAME

       uselocale - set/get the locale for the calling thread

SYNOPSIS

       #include <locale.h>

       locale_t uselocale(locale_t newloc);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       uselocale():
	   Since glibc 2.10:
		  _XOPEN_SOURCE >= 700
	   Before glibc 2.10:
		  _GNU_SOURCE

DESCRIPTION

       The  uselocale() function sets the current locale for the calling thread, and returns the thread's previously current locale.  After a suc-
       cessful call to uselocale(), any calls by this thread to functions that depend on the locale will operate as though the locale has been set
       to newloc.

       The newloc argument can have one of the following values:

       A handle returned by a call to newlocale(3) or duplocale(3)
	      The calling thread's current locale is set to the specified locale.

       The special locale object handle LC_GLOBAL_LOCALE
	      The calling thread's current locale is set to the global locale determined by setlocale(3).

       (locale_t) 0
	      The calling thread's current locale is left unchanged (and the current locale is returned as the function result).

RETURN VALUE

       On  success,  uselocale() returns the locale handle that was set by the previous call to uselocale() in this thread, or LC_GLOBAL_HANDLE if
       there was no such previous call.  On error, it returns (locale_t) 0, and sets errno to indicate the cause of the error.

ERRORS

       EINVAL newloc does not refer to a valid locale object.

VERSIONS

       The uselocale() function first appeared in version 2.3 of the GNU C library.

CONFORMING TO

       POSIX.1-2008.

NOTES

       Unlike setlocale(3), uselocale() does not allow selective replacement of individual locale categories.  To employ a locale that differs	in
       only  a few categories from the current locale, use calls to duplocale(3) and newlocale(3) to obtain a locale object equivalent to the cur-
       rent locale and modify the desired categories in that object.

EXAMPLE

       See newlocale(3) and duplocale(3).

SEE ALSO

       locale(1), duplocale(3), freelocale(3), newlocale(3), setlocale(3), locale(5), locale(7)

COLOPHON

       This page is part of release 4.15 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/.

Linux								    2017-09-15							      USELOCALE(3)

UNIX for Dummies Questions & Answers