NAME
catopen, catclose - open/close a message catalog
SYNOPSIS
#include <features.h>
#include <nl_types.h>
nl_catd catopen(name, flag)
char *name;
int flag;
void catclose(catalog)
nl_catd catalog;
DESCRIPTION
catopen() opens a message catalog and returns a catalog
descriptor. name specifies the name of the message catalog
to be opened. If name specifies and absolute path, (i.e.
contains a `/') then name specifies a pathname for the mes-
sage catalog. Otherwise, the environment variable NLSPATH
is used with name substituted for %N (see locale(7)). If
NLSPATH does not exist in the environment, or if a message
catalog cannot be opened in any of the paths specified by
NLSPATH, then the following paths are searched in order
/etc/locale/LC_MESSAGES
/usr/lib/locale/LC_MESSAGES
/usr/lib/locale/name/LC_MESSAGES
In all cases LC_MESSAGES stands for the current setting of
the LC_MESSAGES category of locale from a previous call to
setlocale() and defaults to the "C" locale. In the last
search path name refers to the catalog name.
The flag argument to catopen is used to indicate the type of
loading desired. This should be either MCLoadBySet or
MCLoadAll. The former value indicates that only the
required set from the catalog is loaded into memory when
needed, whereas the latter causes the initial call to cato-
pen() to load the entire catalog into memory.
catclose() closes the message catalog identified by catalog.
It invalidates any subsequent references to the message
catalog defined by catalog.
RETURN VALUES
catopen() returns a message catalog descriptor of type
nl_catd on success. On failure, it returns -1.
catclose() returns 0 on success, or -1 on failure.
NOTES
These functions are only available in libc.so.4.4.4c and
above. In the case of linux, the catalog descriptor nl_catd
is actually a mmap()'ed area of memory and not a file
descriptor, thus allowing catalogs to be shared.
SEE ALSO
catgets(3), setlocale(3)