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
       successful  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	duplo-
       cale(3)	and  newlocale(3)  to obtain a locale object equivalent to the
       current 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 4.10 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/.



Linux				  2014-03-10			  USELOCALE(3)