Hello,
I've run into an issue trying to use a recent commit of u-boot (v2022.07-rc3-101-g90189ecd59) with some custom scripts. Basically, I've found that the `exit` command does not function whatsoever, and instead it just behaves as a no-op (like the `true` command)
I tracked down the issue and found its source. It's 8c4e3b7[1], which changed the behavior of the exit command without changing the behavior of the command processor to match. The command line code expects exit to return values -2 and lower, which it will respond to by exiting[2]. However, with that commit above, exit will never return a value <= -2, which means the command line loop never exits.
I skimmed the mailing list and haven't found any mentions of this bug yet. I suspect this is because many of the deployments of u-boot are running older versions. However, exit is used rather often in the u-boot scripts I've seen, so I think this might become a major issue when board vendors start upgrading to newer versions of u-boot.
[1]: https://source.denx.de/u-boot/u-boot/-/commit/8c4e3b79bd0bb76eea16869e9666e1... [2]: https://source.denx.de/u-boot/u-boot/-/blob/master/common/cli_hush.c#L1901-1...
Thank you, Adrian Vovk