Binds the path predicate for a message domainname domainname to
the directory name specified by dirname . If domainname is a
non-empty string and has not been bound previously, bindtextdomain()
binds domainname with dirname .
If domainname is a non-empty string and has been bound previously,
bindtextdomain() replaces the old binding with dirname . The dirname
argument can be an absolute or relative pathname being resolved when
gettext() , dgettext() or dcgettext() are called. If domainname
is zero or an empty string, bindtextdomain() returns 0.
User defined domain names cannot begin with the string "SYS_"
.
Domain names beginning with this string are reserved for system use.