* (native). */
    size_t *lengthPtr)		/* Used to return length of name (for
				 * successful searches) or number of non-NULL
				 * entries in environ (for unsuccessful
				 * searches). */
{
    size_t i, result = TCL_IO_FAILURE;
    register const char *env, *p1, *p2;
    const char *env, *p1, *p2;
    Tcl_DString envString;

    Tcl_DStringInit(&envString);
    for (i = 0, env = environ[i]; env != NULL; i++, env = environ[i]) {
	p1 = Tcl_ExternalToUtfDString(NULL, env, -1, &envString);
	p2 = name;