uselocale(3) - phpMan
USELOCALE(3) Linux Programmer's Manual USELOCALE(3)
uselocale - set/get the locale for the calling thread
locale_t uselocale(locale_t newloc);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
Since glibc 2.10:
_XOPEN_SOURCE >= 700
Before glibc 2.10:
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‐
The calling thread's current locale is left unchanged (and the current locale is
returned as the function result).
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.
EINVAL newloc does not refer to a valid locale object.
The uselocale() function first appeared in version 2.3 of the GNU C library.
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.
See newlocale(3) and duplocale(3).
locale(1), duplocale(3), freelocale(3), newlocale(3), setlocale(3), locale(5), locale(7)
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Linux 2014-03-10 USELOCALE(3)