USELOCALE(3) BSD Library Functions Manual USELOCALE(3)NAME
uselocale -- Set the per-thread locale
SYNOPSIS
#include <xlocale.h>
locale_t
uselocale(locale_t loc);
DESCRIPTION
Sets the per-thread locale to loc. Specify LC_GLOBAL_LOCALE to turn off any per-thread locale. Pass NULL to return the current value of the
per-thread locale (or LC_GLOBAL_LOCALE) without changing the locale.
RETURN VALUES
Returns the previous locale, or LC_GLOBAL_LOCALE if no per-thread locale was in effect.
SEE ALSO duplocale(3), freelocale(3), newlocale(3), querylocale(3), xlocale(3)BSD March 11, 2005 BSD
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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 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)
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