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uselocale(3p) — Linux manual page

PROLOG \|NAME \|SYNOPSIS \|DESCRIPTION \|RETURN VALUE \|ERRORS \|EXAMPLES \|APPLICATION USAGE \|RATIONALE \|FUTURE DIRECTIONS \|SEE ALSO \|COPYRIGHT

USELOCALE(3P)           POSIX Programmer's ManualUSELOCALE(3P)

PROLOG top

       This manual page is part of the POSIX Programmer's Manual.  The       Linux implementation of this interface may differ (consult the       corresponding Linux manual page for details of Linux behavior), or       the interface may not be implemented on Linux.

NAME top

       uselocale — use locale in current thread

SYNOPSIS top

       #include <locale.h>       locale_t uselocale(locale_tnewloc);

DESCRIPTION top

       Theuselocale() function shall set or query the current locale for       the calling thread.       The value for thenewloc argument shall be one of the following:        1. A value returned by thenewlocale() orduplocale() functions        2. The special locale object descriptor LC_GLOBAL_LOCALE        3. (locale_t)0       If thenewloc argument is (locale_t)0, the current locale shall       not be changed; this value can be used to query the current locale       setting. If thenewloc argument is LC_GLOBAL_LOCALE, any thread-       local locale for the calling thread shall be uninstalled; the       thread shall again use the global locale as the current locale,       and changes to the global locale shall affect the thread.       Otherwise, the locale represented bynewloc shall be installed as       a thread-local locale to be used as the current locale for the       calling thread.       Once theuselocale() function has been called to install a thread-       local locale, the behavior of every interface using data from the       current locale shall be affected for the calling thread. The       current locale for other threads shall remain unchanged.

RETURN VALUE top

       Upon successful completion, theuselocale() function shall return       a handle for the thread-local locale that was in use as the       current locale for the calling thread on entry to the function, or       LC_GLOBAL_LOCALE if no thread-local locale was in use. Otherwise,uselocale() shall return (locale_t)0 and seterrno to indicate the       error.

ERRORS top

       Theuselocale() function may fail if:EINVALnewloc is not a valid locale object and is not (locale_t)0.The following sections are informative.

EXAMPLES top

       None.

APPLICATION USAGE top

       Unlike thesetlocale() function, theuselocale() function does not       allow replacing some locale categories only. Applications that       need to install a locale which differs only in a few categories       must usenewlocale() to change a locale object equivalent to the       currently used locale and install it.

RATIONALE top

       None.

FUTURE DIRECTIONS top

       None.

COPYRIGHT top

       Portions of this text are reprinted and reproduced in electronic       form from IEEE Std 1003.1-2017, Standard for Information       Technology -- Portable Operating System Interface (POSIX), The       Open Group Base Specifications Issue 7, 2018 Edition, Copyright       (C) 2018 by the Institute of Electrical and Electronics Engineers,       Inc and The Open Group.  In the event of any discrepancy between       this version and the original IEEE and The Open Group Standard,       the original IEEE and The Open Group Standard is the referee       document. The original Standard can be obtained online athttp://www.opengroup.org/unix/online.html .       Any typographical or formatting errors that appear in this page       are most likely to have been introduced during the conversion of       the source files to man page format. To report such errors, seehttps://www.kernel.org/doc/man-pages/reporting_bugs.html .IEEE/The Open Group                2017USELOCALE(3P)

Pages that refer to this page:locale.h(0p), duplocale(3p), freelocale(3p), isalnum(3p), isalpha(3p), isblank(3p), iscntrl(3p), isgraph(3p), islower(3p), isprint(3p), ispunct(3p), isspace(3p), isupper(3p), iswalnum(3p), iswalpha(3p), iswblank(3p), iswcntrl(3p), iswctype(3p), iswdigit(3p), iswgraph(3p), iswlower(3p), iswprint(3p), iswpunct(3p), iswspace(3p), iswupper(3p), iswxdigit(3p), localeconv(3p), newlocale(3p), nl_langinfo(3p), setlocale(3p), strftime(3p), tolower(3p), toupper(3p), towlower(3p), towupper(3p)