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Manual Pages  — CATOPEN

NAME

catopen – open message catalog

CONTENTS

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <nl_types.h>

nl_catd
catopen(const char *name, int oflag);

DESCRIPTION

The catopen() function opens the message catalog specified by name and returns a message catalog descriptor. If name contains a '/' then name specifies the full pathname for the message catalog, otherwise the value of the environment variable NLSPATH is used with the following substitutions:
%N The value of the name argument.
%L The value of the LANG environment variable or the LC_MESSAGES category (see below).
%l The language element from the LANG environment variable or from the LC_MESSAGES category.
%t The territory element from the LANG environment variable or from the LC_MESSAGES category.
%c The codeset element from the LANG environment variable or from the LC_MESSAGES category.
%% A single % character.

An empty string is substituted for undefined values.

Path names templates defined in NLSPATH are separated by colons (':'). A leading or two adjacent colons is equivalent to specifying %N.

If the oflag argument is set to the NL_CAT_LOCALE constant, LC_MESSAGES locale category used to open the message catalog; using NL_CAT_LOCALE conforms to the -xpg4 standard. You can specify 0 for compatibility with -xpg3; when oflag is set to 0, the LANG environment variable determines the message catalog locale.

A message catalog descriptor remains valid in a process until that process closes it, or until a successful call to one of the exec(3) function.

RETURN VALUES

Upon successful completion, catopen() returns a message catalog descriptor. Otherwise, (nl_catd) -1 is returned and errno is set to indicate the error.

ERRORS

[EINVAL]
  Argument name does not point to a valid message catalog, or catalog is corrupt.
[ENAMETOOLONG]
  An entire path to the message catalog exceeded 1024 characters.
[ENOENT]
  The named message catalog does not exists, or the name argument points to an empty string.
[ENOMEM]
  Insufficient memory is available.

SEE ALSO

gencat(1), catclose(3), catgets(3), setlocale(3)

STANDARDS

The catopen() function conforms to IEEE Std 1003.1-2001 ("POSIX.1").

CATOPEN (3) February 12, 2005

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