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Re: Re* [PATCH v5] describe: refresh the index when 'broken' flag is used

From
Jeff King <peff@peff.net>
Date
Jun 27, 2024, 00:33 UTC
Message-ID
<20240627003323.GA1460039@coredump.intra.peff.net>
In-Reply-To
<20240626203415.GA441931@coredump.intra.peff.net>
On Wed, Jun 26, 2024 at 04:34:17PM -0400, Jeff King wrote:
Show 13 quoted lines
> >  * What is this thing trying to do?  When run_command() fails, it
> >    wants to leave cp.out open, so that the caller this returns to
> >    can write into it???  That cannot be the case, as cp itself is
> >    internal.  So does this "close(cp.out)" really matter?
> 
> I think it's totally broken. Using cp.out, cp.in, etc, with
> run_command() is a deadlock waiting to happen, since it implies opening
> a pipe, not doing anything with our end, and then doing a waitpid() on
> the child.
> 
> You'd always want to use start_command(), and then do something useful
> with the pipe, and then finish_command(). Arguably run_command() should
> bug if cp.out, etc are non-zero.

Oh, I guess I should have looked at the code. We do indeed BUG() in this case already, courtesy of c29b3962af (run-command: forbid using run_command with piped output, 2015-03-22).

So all is well there. This caller is still completely wrong to call close() though.

-Peff
Previous: Jeff KingNext: Karthik Nayak
Message 19 of 32 in “describe: refresh the index when 'broken' flag is used”
  1. describe: refresh the index when 'broken' flag is usedAbhijeet Sonar, Jun 25, 2024
  2. Junio C HamanoJun 25, 2024
  3. Junio C HamanoJun 25, 2024
  4. Karthik NayakJun 26, 2024
  5. Abhijeet SonarJun 26, 2024
  6. describe: refresh the index when 'broken' flag is usedAbhijeet Sonar, Jun 26, 2024
  7. Abhijeet SonarJun 26, 2024
  8. describe: refresh the index when 'broken' flag is usedAbhijeet Sonar, Jun 26, 2024
  9. Karthik NayakJun 26, 2024
  10. Abhijeet SonarJun 26, 2024
  11. Re* [PATCH v5] describe: refresh the index when 'broken' flag is usedJunio C Hamano, Jun 26, 2024
  12. Junio C HamanoJun 26, 2024
  13. Abhijeet SonarJun 26, 2024
  14. Junio C HamanoJun 26, 2024
  15. Junio C HamanoJun 26, 2024
  16. Abhijeet SonarJun 26, 2024
  17. Junio C HamanoJun 26, 2024
  18. Jeff KingJun 26, 2024
  19. Jeff KingJun 27, 2024
  20. Karthik NayakJun 26, 2024
  21. Junio C HamanoJun 26, 2024
  22. Junio C HamanoJun 26, 2024
  23. describe: refresh the index when 'broken' flag is usedAbhijeet Sonar, Jun 26, 2024
  24. Abhijeet SonarJun 26, 2024
  25. Abhijeet SonarJun 27, 2024
  26. Junio C HamanoJun 27, 2024
  27. Abhijeet SonarJun 27, 2024
  28. Karthik NayakJun 30, 2024
  29. Junio C HamanoJul 1, 2024
  30. Karthik NayakJul 2, 2024
  31. Junio C HamanoJul 3, 2024
  32. Karthik NayakJul 3, 2024

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