redhat man page for textdomain

TEXTDOMAIN(3)						     Library Functions Manual						     TEXTDOMAIN(3)

NAME
       textdomain - set domain for future gettext() calls

SYNOPSIS
       #include <libintl.h>

       char * textdomain (const char * domainname);

DESCRIPTION
       The textdomain function sets or retrieves the current message domain.

       A  message  domain  is a set of translatable msgid messages. Usually, every software package has its own message domain. The domain name is
       used to determine the message catalog where a translation is looked up; it must be a non-empty string.

       The current message domain is used by the gettext, ngettext functions, and by the dgettext, dcgettext, dngettext and  dcngettext  functions
       when called with a NULL domainname argument.

       If  domainname  is  not	NULL,  the current message domain is set to domainname. The string the function stores internally is a copy of the
       domainname argument.

       If domainname is NULL, the function returns the current message domain.

RETURN VALUE
       If successful, the textdomain function returns the current message domain, after possibly changing it. The resulting string is valid  until
       the  next  textdomain  call  and  must not be modified or freed. If a memory allocation failure occurs, it sets errno to ENOMEM and returns
       NULL.

ERRORS
       The following error can occur, among others:

       ENOMEM Not enough memory available.

BUGS
       The return type ought to be const char *, but is char * to avoid warnings in C code predating ANSI C.

SEE ALSO
       gettext(3), ngettext(3), bindtextdomain(3), bind_textdomain_codeset(3)

GNU gettext 0.11.4						     May 2001							     TEXTDOMAIN(3)