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CATOPEN(3)                              BSD Library Functions Manual                              CATOPEN(3)

NAME
     catopen -- open message catalog

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, oth-erwise otherwise
     erwise 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 X/Open Portability Guide Issue 4 (``XPG4'')
     standard.  You can specify 0 for compatibility with X/Open Portability Guide Issue 3 (``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 suc-cessful successful
     cessful 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 X/Open Portability Guide Issue 4 (``XPG4'').

BSD                                             May 29, 1994                                             BSD