uClibc thread-safety analysis

Things that are still known to be needed for thread safety:

        getgrgid_r		<not implemented, required by SuSv3>
        getgrnam_r		<not implemented, required by SuSv3>





Things that might be nice, but are not required:

        gethostent_r            <desired, but not required for SuSv3>
        getnetbyaddr_r          <desired, but not required for SuSv3>
        getnetent_r             <desired, but not required for SuSv3>
        getnetbyname_r          <desired, but not required for SuSv3>
        getprotobynumber_r      <desired, but not required for SuSv3>
        getprotoent_r           <desired, but not required for SuSv3>
        getprotobyname_r        <desired, but not required for SuSv3>
        getnetbyaddr_r          <desired, but not required for SuSv3>
        getnetbyname_r          <desired, but not required for SuSv3>
        getnetent_r             <desired, but not required for SuSv3>
        getprotobynumber_r      <desired, but not required for SuSv3>
        getprotoent_r           <desired, but not required for SuSv3>
        getprotobyname_r        <desired, but not required for SuSv3>



Functions that use static data and may still need locking:


        --------------------------------------------------------------------

        libc/inet/rpc/rpc_thread.c:

	__rpc_thread_variables is currently disabled, since thread
	local storage seems to not be correctly specified as 
	weak functions.

        --------------------------------------------------------------------

        unistd/getpass.c:

        static char buf[PWD_BUFFER_SIZE];

        getpass                 <fix required>                          <---
        
        NOTE: This function returns a pointer to a static data structure.
        This seems like it requires an _r version of this function.  Glibc
        does the same thing.  Oops!  So much for thread-safe glibc!

        --------------------------------------------------------------------

        unistd/sysconf.c:

        static long int ret_vals[_UCLIBC_SYSCONF_NUM_VALID_ARGS];

        find_or_add_in_table    <fix required?>                         <---
        main                    <fix required?>                         <---

        NOTE: I'm not sure if this needs to be made reentrant...

        --------------------------------------------------------------------
