On 1/5/24 2:46 PM, Mykyta Dorokhin wrote:
Bash Version: 5.1 Patch Level: 16 Release Status: releaseDescription: I'm working on a custom project within the Yocto framework. After a recent build system update, the bash version updated to 5.1.16. Subsequently, I've noticed peculiar side effects related to using 'wait' and signals. Below is a script demonstrating the issue. The problem lies in the fact that, in the case of waiting on 'wait' in the script, only the first signal interrupts 'wait'; subsequent signals of the same type do not interrupt 'wait', and it remains blocked. I manually switched bash versions and compiled a table (bash version - Yocto version): 5.0.18 (dunfell): No issues 5.1.4 (hardknott): Has issues 5.1.8 (honister): Has issues 5.1.16 (kirkstone): Has issues 5.2.21 (master): Has issues Meanwhile, in my home desktop distribution, Ubuntu 22.04, I tested the same scenario, and everything works correctly; signals are processed as expected. My assumption is that the problem may be related to my Yocto build being intended for a 32-bit device, and perhaps the bug only manifests in this case.
The only way I could see a potential problem was if you're using a 32-bit build on a 64-bit device.
I consider this a significant issue. Could you confirm whether any testing has been conducted on 32-bit platforms, as it seems that everything works correctly on 64-bit desktops?
I don't have any 32-bit platforms available for testing, but I have a hard time believing that it would make a difference. Like you, I can't reproduce it on the desktop platforms I have available right now. The bash devel git branch has fairly fine granularity. If you can automate the signal sending somewhat, maybe by having a child process send signals to $$, you could use your script and `git bisect' to find the commit where the behavior changed. bash-5.0 was frozen 12/31/2018, and bash-5.1 was frozen 12/14/2020, so that should get you started with the devel branch commits you want to inspect. http://git.savannah.gnu.org/cgit/bash.git/log/?h=devel -- ``The lyf so short, the craft so long to lerne.'' - Chaucer ``Ars longa, vita brevis'' - Hippocrates Chet Ramey, UTech, CWRU c...@case.edu http://tiswww.cwru.edu/~chet/
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