CATOPEN(3)

NAME
catopen - open message catalog

LIBRARY
libc

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.

[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 xpg4.