bindtextdomain 函数

BINDTEXTDOMAIN(3)                                                                                                                       

NAME
       bindtextdomain - set directory containing message catalogs

SYNOPSIS
       #include 

       char * bindtextdomain (const char * domainname, const char * dirname);

DESCRIPTION
       The bindtextdomain function sets the base directory of the hierarchy containing message catalogs for a given message domain.

       A  message  domain is a set of translatable msgid messages. Usually, every software package has its own message domain. The need for calling bind‐
       textdomain arises because packages are not always installed with the same prefix as the  header and the libc/libintl libraries.

       Message catalogs will be expected at the pathnames dirname/locale/category/domainname.mo, where locale is a locale name and category is  a  locale
       facet such as LC_MESSAGES.

       domainname must be a non-empty string.

       If dirname is not NULL, the base directory for message catalogs belonging to domain domainname is set to dirname. The function makes copies of the
       argument strings as needed. If the program wishes to call the chdir function, it is important that dirname be an absolute pathname;  otherwise  it
       cannot be guaranteed that the message catalogs will be found.

       If dirname is NULL, the function returns the previously set base directory for domain domainname.

RETURN VALUE
       If  successful,  the  bindtextdomain  function returns the current base directory for domain domainname, after possibly changing it. The resulting
       string is valid until the next bindtextdomain call for the same domainname 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), dgettext(3), dcgettext(3), ngettext(3), dngettext(3), dcngettext(3), textdomain(3), realpath(3)