dumpling: precheck log file permisssion

[GMHDBJD]

What problem does this PR solve?

Issue Number: close #61100
ref pingcap/log#43

Problem Summary:

What changed and how does it work?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No need to test

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[tiprow]

Hi @GMHDBJD. Thanks for your PR.

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[GMHDBJD]

/retest

[tiprow]

@GMHDBJD: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

Details

In response to this:

/retest

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-05-14 03:15:59.031110551 +0000 UTC m=+501425.179071768: ☑️ agreed by tangenta.
• 2025-05-14 03:30:36.774023682 +0000 UTC m=+502302.921984897: ☑️ agreed by hawkingrei.

[Benjamin2037]

LGTM

[bb7133]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bb7133, Benjamin2037, hawkingrei, tangenta

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Details

Needs approval from an approver in each of these files:

• OWNERS [Benjamin2037,bb7133,hawkingrei,tangenta]
• dumpling/OWNERS [Benjamin2037,tangenta]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[GMHDBJD]

/run-cherry-picker

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.5: #61102.
But this PR has conflicts, please resolve them!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.5521%. Comparing base (41045f1) to head (bf79040).
Report is 1 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #61101        +/-   ##
================================================
+ Coverage   73.1476%   73.5521%   +0.4044%     
================================================
  Files          1724       1724                
  Lines        477139     477177        +38     
================================================
+ Hits         349016     350974      +1958     
+ Misses       106718     104806      -1912     
+ Partials      21405      21397         -8     

Flag	Coverage Δ
integration	42.5630% <ø> (?)
unit	72.3702% <ø> (-0.0079%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	52.7804% <ø> (ø)
parser	∅ <ø> (∅)
br	47.5779% <ø> (+0.0137%)	⬆️

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