USELOCALE
Section: Linux Programmer's Manual (3)
Updated: 2017-09-15
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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
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 4.13 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/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- VERSIONS
-
- CONFORMING TO
-
- NOTES
-
- EXAMPLE
-
- SEE ALSO
-
- COLOPHON
-
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