/********************************************************************************* *                  busybox microcom Segmentation fault * 说明： *     调试硬件的时候想用microcom来测试一下串口，结果发现段错误，其他busybox命令正常， * 觉得有点奇怪，查看microcom的patch之后发现这个问题已经修复了。 * *                                              2017-10-17 深圳 南山平山村 曾剑锋 ********************************************************************************/一、参考文档：    1. [PATCH] miscutils/microcom: Fixed segfault        http://lists.busybox.net/pipermail/busybox/2017-August/085720.html二、解决办法：    microcom did not check if required parameter TTY is present. Thus,    bb_basename() was called with a NULL pointer if TTY was missing.    This commit adds the missing check.    ---      miscutils/microcom.c | 5 +++++      1 file changed, 5 insertions(+)        diff --git a/miscutils/microcom.c b/miscutils/microcom.c    index 14b9f3baf..38f6425c1 100644    --- a/miscutils/microcom.c    +++ b/miscutils/microcom.c    @@ -78,6 +78,11 @@ int microcom_main(int argc UNUSED_PARAM, char **argv)      //    argc -= optind;          argv += optind;          +    if (*argv == NULL){    +        bb_show_usage();    +        return EXIT_FAILURE;    +    }    +          // try to create lock file in /var/lock          device_lock_file = (char *)bb_basename(argv[0]);          device_lock_file = xasprintf("/var/lock/LCK..%s", device_lock_file);