nl_langinfo(3)

1NL_LANGINFO(3)             Linux Programmer's Manual            NL_LANGINFO(3)
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NAME

6       nl_langinfo - query language and locale information
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SYNOPSIS

9       #include <langinfo.h>
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11       char *nl_langinfo(nl_item item);
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DESCRIPTION

14       The  nl_langinfo()  function provides access to locale information in a
15       more flexible way than localeconv(3) does.  Individual  and  additional
16       elements of the locale categories can be queried.
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18       Examples  for  the  locale elements that can be specified in item using
19       the constants defined in <langinfo.h> are:
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21       CODESET (LC_CTYPE)
22              Return a string with the name of the character encoding used  in
23              the   selected   locale,   such  as  "UTF-8",  "ISO-8859-1",  or
24              "ANSI_X3.4-1968" (better known as US-ASCII).  This is  the  same
25              string  that you get with "locale charmap".  For a list of char‐
26              acter encoding names, try "locale -m", cf. locale(1).
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28       D_T_FMT (LC_TIME)
29              Return a string that can be used as a format  string  for  strf‐
30              time(3) to represent time and date in a locale-specific way.
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32       D_FMT (LC_TIME)
33              Return  a  string  that can be used as a format string for strf‐
34              time(3) to represent a date in a locale-specific way.
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36       T_FMT (LC_TIME)
37              Return a string that can be used as a format  string  for  strf‐
38              time(3) to represent a time in a locale-specific way.
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40       DAY_{1–7} (LC_TIME)
41              Return  name of the n-th day of the week. [Warning: this follows
42              the US convention DAY_1 = Sunday, not the international  conven‐
43              tion (ISO 8601) that Monday is the first day of the week.]
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45       ABDAY_{1–7} (LC_TIME)
46              Return abbreviated name of the n-th day of the week.
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48       MON_{1–12} (LC_TIME)
49              Return name of the n-th month.
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51       ABMON_{1–12} (LC_TIME)
52              Return abbreviated name of the n-th month.
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54       RADIXCHAR (LC_NUMERIC)
55              Return radix character (decimal dot, decimal comma, etc.).
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57       THOUSEP (LC_NUMERIC)
58              Return  separator  character for thousands (groups of three dig‐
59              its).
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61       YESEXPR (LC_MESSAGES)
62              Return a regular expression that can be used with  the  regex(3)
63              function to recognize a positive response to a yes/no question.
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65       NOEXPR (LC_MESSAGES)
66              Return  a  regular expression that can be used with the regex(3)
67              function to recognize a negative response to a yes/no question.
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69       CRNCYSTR (LC_MONETARY)
70              Return the currency symbol, preceded by "-" if the symbol should
71              appear  before  the value, "+" if the symbol should appear after
72              the value, or "." if the symbol should replace the radix charac‐
73              ter.
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75       The  above  list  covers  just  some  examples  of  items  that  can be
76       requested.  For a more detailed list, consult The GNU C Library  Refer‐
77       ence Manual.
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RETURN VALUE

80       If no locale has been selected by setlocale(3) for the appropriate cat‐
81       egory, nl_langinfo() returns a pointer to the corresponding  string  in
82       the "C" locale.
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84       If item is not valid, a pointer to an empty string is returned.
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86       This  pointer  may  point to static data that may be overwritten on the
87       next call to nl_langinfo() or setlocale(3).
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CONFORMING TO

90       SUSv2, POSIX.1-2001.
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EXAMPLE

93       The following program sets the character type locale according  to  the
94       environment and queries the terminal character set.
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96       #include <langinfo.h>
97       #include <locale.h>
98       #include <stdio.h>
99       #include <stdlib.h>
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101       int
102       main(int argc, char *argv[])
103       {
104           setlocale(LC_CTYPE,"");
105           printf("%s\n",nl_langinfo(CODESET));
106           exit(EXIT_SUCCESS);
107       }
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COLOPHON

114       This  page  is  part of release 3.53 of the Linux man-pages project.  A
115       description of the project, and information about reporting  bugs,  can
116       be found at http://www.kernel.org/doc/man-pages/.
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120GNU                               2010-10-03                    NL_LANGINFO(3)