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.
The <nl_types.h> header shall define at least the following types:
nl_catd Used by the message catalog functions catopen(),
catgets(), and catclose() to identify a catalog
nl_item Used by nl_langinfo() to identify items of langinfo
data. Values of objects of type nl_item are defined in
The <nl_types.h> header shall define at least the following symbolic
NL_SETD Used by gencat when no $set directive is specified in a
message text source file. This constant can be passed
as the value of set_id on subsequent calls to catgets()
(that is, to retrieve messages from the default message
set). The value of NL_SETD is implementation-defined.
NL_CAT_LOCALE Value that must be passed as the oflag argument to
catopen() to ensure that message catalog selection
depends on the LC_MESSAGES locale category, rather than
directly on the LANG environment variable.
The following shall be declared as functions and may also be defined
as macros. Function prototypes shall be provided.
int catclose(nl_catd);char *catgets(nl_catd, int, int, const char *);nl_catd catopen(const char *, int);The following sections are informative.
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The Open
Group Base Specifications Issue 7, Copyright (C) 2013 by the
Institute of Electrical and Electronics Engineers, Inc and The Open
Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
applied.) 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 at http://www.unix.org/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, see
IEEE/The Open Group 2013 nl_types.h(0P)