.\"	$Id: catopen.3,v 1.4 1997/02/22 15:00:48 peter Exp $
.\"
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.Dd May 29, 1994
.Dt CATOPEN 3
.Os
.Sh NAME
.Nm catopen
.Nd open message catalog 
.Sh SYNOPSIS
.Fd #include <nl_types.h>
.Ft nl_catd
.Fn catopen "const char *name" "int oflag"
.Sh DESCRIPTION
The 
.Fn catopen
function opens the message catalog specified by
.Fa name 
and returns a message catalog descriptor.
If
.Fa name
contains a
.Sq / 
then 
.Fa name
specifies the full pathname for the message catalog, otherwise the value 
of the environment variable
.Ev NLSPATH 
is used with 
.Fa name
substituted for %N.
.Pp
If the
.Fa oflag
argument is set to the
.Dv NL_CAT_LOCALE
constant,
.Dv LC_MESSAGES
locale category used to open the message catalog; using
.Dv NL_CAT_LOCALE
conforms to the
.St -xpg4
standard. You can specify 0 for compatibility with
.St -xpg3 ;
when
.Fa oflag
is set to 0, the
.Ev LANG
environment variable
determines the message catalog locale.
.Sh RETURN VALUE
Upon successful completion, 
.Fn catopen
returns a message catalog descriptor.
Otherwise, (nl_catd) -1 is returned and
.Va errno 
is set to indicate the error.
.Sh ERRORS
.Bl -tag -width Er
.It Bq Er ENOMEM
Insufficient memory is available.
.El
.Sh SEE ALSO
.Xr catclose 3 ,
.Xr catgets 3
.Sh STANDARDS
The
.Fn catopen
function conforms to
.St -xpg4 .