from small one page howto to huge articles all in one place
 

search text in:





Poll
Which linux distribution do you use?







poll results

Last additions:
using iotop to find disk usage hogs

using iotop to find disk usage hogs

words:

887

views:

185934

userrating:

average rating: 1.7 (102 votes) (1=very good 6=terrible)


May 25th. 2007:
Words

486

Views

250337

why adblockers are bad


Workaround and fixes for the current Core Dump Handling vulnerability affected kernels

Workaround and fixes for the current Core Dump Handling vulnerability affected kernels

words:

161

views:

137481

userrating:

average rating: 1.4 (42 votes) (1=very good 6=terrible)


April, 26th. 2006:

Druckversion
You are here: manpages





DUPLOCALE

Section: Linux Programmer's Manual (3)
Updated: 2017-09-15
Index Return to Main Contents
 

NAME

duplocale - duplicate a locale object  

SYNOPSIS

#include <locale.h>

locale_t duplocale(locale_t locobj);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

duplocale():

Since glibc 2.10:
_XOPEN_SOURCE >= 700
Before glibc 2.10:
_GNU_SOURCE
 

DESCRIPTION

The duplocale() function creates a duplicate of the locale object referred to by locobj.

If locobj is LC_GLOBAL_LOCALE, duplocale() creates a locale object containing a copy of the global locale determined by setlocale(3).  

RETURN VALUE

On success, duplocale() returns a handle for the new locale object. On error, it returns (locale_t) 0, and sets errno to indicate the cause of the error.  

ERRORS

ENOMEM
Insufficient memory to create the duplicate locale object.
 

VERSIONS

The duplocale() function first appeared in version 2.3 of the GNU C library.  

CONFORMING TO

POSIX.1-2008.  

NOTES

Duplicating a locale can serve the following purposes:
*
To create a copy of a locale object in which one of more categories are to be modified (using newlocale(3)).
*
To obtain a handle for the current locale which can used in other functions that employ a locale handle, such as toupper_l(3). This is done by applying duplocale() to the value returned by the following call:

    loc = uselocale((locale_t) 0);
This technique is necessary, because the above uselocale(3) call may return the value LC_GLOBAL_LOCALE, which results in undefined behavior if passed to functions such as toupper_l(3). Calling duplocale() can be used to ensure that the LC_GLOBAL_LOCALE value is converted into a usable locale object. See EXAMPLE, below.

Each locale object created by duplocale() should be deallocated using freelocale(3).  

EXAMPLE

The program below uses uselocale(3) and duplocale() to obtain a handle for the current locale which is then passed to toupper_l(3). The program takes one command-line argument, a string of characters that is converted to uppercase and displayed on standard output. An example of its use is the following:

$ ./a.out abc ABC  

Program source

#define _XOPEN_SOURCE 700 #include <ctype.h> #include <stdio.h> #include <stdlib.h> #include <locale.h>

#define errExit(msg) do { perror(msg); exit(EXIT_FAILURE); \
                        } while (0)

int main(int argc, char *argv[]) {
    locale_t loc, nloc;
    char *p;


    if (argc != 2) {
        fprintf(stderr, "Usage: %s string\n", argv[0]);
        exit(EXIT_FAILURE);
    }


    /* This sequence is necessary, because uselocale() might return
       the value LC_GLOBAL_LOCALE, which canaqt be passed as an
       argument to toupper_l() */


    loc = uselocale((locale_t) 0);
    if (loc == (locale_t) 0)
        errExit("uselocale");


    nloc = duplocale(loc);
    if (nloc == (locale_t) 0)
        errExit("duplocale");


    for (p = argv[1]; *p; p++)
        putchar(toupper_l(*p, nloc));


    printf("\n");


    freelocale(nloc);


    exit(EXIT_SUCCESS); }  

SEE ALSO

freelocale(3), newlocale(3), setlocale(3), uselocale(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
Program source
SEE ALSO
COLOPHON





Support us on Content Nation
rdf newsfeed | rss newsfeed | Atom newsfeed
- Powered by LeopardCMS - Running on Gentoo -
Copyright 2004-2020 Sascha Nitsch Unternehmensberatung GmbH
Valid XHTML1.1 : Valid CSS : buttonmaker
- Level Triple-A Conformance to Web Content Accessibility Guidelines 1.0 -
- Copyright and legal notices -
Time to create this page: 19.1 ms