in_blob: fix glob function for win32

[zshuang0316]

Set context glob path size correctly.

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Testing
Before we can approve your change; please submit the following in a comment:

• [ N/A] Example configuration file for the change
• Debug log output from testing the change
  [2025/11/15 17:48:33] [debug] [input:blob:blob.0] scanning path C:\data\Logs\local*.log
  [2025/11/15 17:48:33] [ info] [input:blob:blob.0] DEBUG: recursive_file_search called with path='NULL' pattern='C:\data\Logs\local*.log'
  [2025/11/15 17:48:33] [ info] [input:blob:blob.0] DEBUG: calling glob with local_pattern='C:\data\Logs\local*.log'
  [2025/11/15 17:48:33] [ info] [input:blob:blob.0] DEBUG: glob returned 0, found 14 matches

• Attached Valgrind output that shows no leaks or memory corruption was found

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• [N/A ] Run local packaging test showing all targets (including any new ones) build.
• [N/A ] Set ok-package-test label to test for all targets (requires maintainer to do).

Documentation

• [ N/A] Documentation required for this feature

Backporting

• Backport to latest stable release.

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Fluent Bit is licensed under Apache 2.0, by submitting this pull request I understand that this code will be released under the terms of that license.

Summary by CodeRabbit

• Bug Fixes

  • Corrected the count of results returned by glob operations on Windows.

• Style

  • Fixed file formatting with proper line endings.

[coderabbitai]

Walkthrough

The glob function in the Windows glob implementation is updated to properly set the gl_pathc field with the count of matched entries after populating gl_pathv. A trailing newline is added after the final #endif for formatting consistency.

Changes

Cohort / File(s)	Summary
Windows glob counter initialization plugins/in_blob/win32_glob.c	Set context->gl_pathc = entries to expose the count of matched path results after populating the path vector

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

• The change is minimal and localized to a single file
• Setting a counter field is straightforward
• Verify that gl_pathc is the correct field for storing the entry count and that entries reflects the accurate matched count

Suggested labels

backport to v4.0.x

Suggested reviewers

• koleini

Poem

🐰 Glob patterns now count their findings true,
Each path discovered, tallied through and through,
A trailing newline, neat and clean,
The smallest changes, most pristine!

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: fixing the glob function for win32 in the in_blob plugin, which aligns with setting context->gl_pathc correctly after populating gl_pathv.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[coderabbitai]

Actionable comments posted: 0

🧹 Nitpick comments (1)

plugins/in_blob/win32_glob.c (1)

107-117: Consider defensive cleanup in globfree.

For consistency and defensive programming, consider:

1. Setting context->gl_pathc = 0 after freeing gl_pathv
2. Removing the unused index variable declared on line 109

These changes would make the cleanup more complete and remove dead code.

 static void globfree(glob_t *context)
 {
-    size_t index;
-
     if (context->gl_pathv != NULL) {
         flb_free(context->gl_pathv);
         context->gl_pathv = NULL;
+        context->gl_pathc = 0;
     }

     flb_file_glob_clean(&context->inner_context);
 }

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between f1ba23a and b1381a1.

📒 Files selected for processing (1)

• plugins/in_blob/win32_glob.c (2 hunks)

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (31)

• GitHub Check: pr-windows-build / call-build-windows-package (Windows 64bit (Arm64), amd64_arm64, -DCMAKE_SYSTEM_NAME=Windows -DCMA...
• GitHub Check: pr-windows-build / call-build-windows-package (Windows 32bit, x86, x86-windows-static, 3.31.6)
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🔇 Additional comments (2)

plugins/in_blob/win32_glob.c (2)

153-153: Essential fix: properly exposes the match count.

This correctly sets gl_pathc to the number of matched paths after populating gl_pathv. Without this assignment, callers would have no way to determine how many entries are in the path array, breaking the glob functionality on Windows.

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608-608: Good practice: file ends with newline.

This formatting improvement aligns with standard coding conventions.

[cosmo0920]

It looks good to me.