ENGINE_ctrl
if ((flags = ENGINE_ctrl(e, ENGINE_CTRL_GET_CMD_FLAGS, cmd,
((num = ENGINE_ctrl(e, ENGINE_CTRL_GET_CMD_FROM_NAME,
if (ENGINE_ctrl(e, num, i, p, f) > 0)
((num = ENGINE_ctrl(e, ENGINE_CTRL_GET_CMD_FROM_NAME, 0,
if ((flags = ENGINE_ctrl(e, ENGINE_CTRL_GET_CMD_FLAGS, num,
if (ENGINE_ctrl(e, num, 0, (void *)arg, NULL) > 0)
if (ENGINE_ctrl(e, num, 0, (void *)arg, NULL) > 0)
if (ENGINE_ctrl(e, num, l, NULL, NULL) > 0)
int ENGINE_ctrl(ENGINE *e, int cmd, long i, void *p, void (*f)(void));