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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  set‐
              locale(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 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 3.74 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 http://www.kernel.org/doc/man-pages/.



Linux                                       2014-03-10                               USELOCALE(3)


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