tuhaihe opened a new pull request, #1589:
URL: https://github.com/apache/cloudberry/pull/1589
initdb's setup_cdb_schema() checked errno after readdir() iteration, but did
not clear errno before entering the loop.
On some environments (observed on Ubuntu 24.04), a stale errno value can
survive into this check and be misinterpreted as a readdir failure, causing:
error while reading cdb_init.d directory: Function not implemented
Fix by:
- setting errno=0 before the readdir() loop
- storing readdir errno immediately after the loop
- handling closedir() errors separately
- using the saved readdir errno for the post-loop error check
This prevents false-positive failures during initdb while preserving proper
I/O error reporting.
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Fixes #ISSUE_Number
### What does this PR do?
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### Type of Change
- [ ] Bug fix (non-breaking change)
- [ ] New feature (non-breaking change)
- [ ] Breaking change (fix or feature with breaking changes)
- [ ] Documentation update
### Breaking Changes
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### Test Plan
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- [ ] Unit tests added/updated
- [ ] Integration tests added/updated
- [ ] Passed `make installcheck`
- [ ] Passed `make -C src/test installcheck-cbdb-parallel`
### Impact
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**Performance:**
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**User-facing changes:**
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**Dependencies:**
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### Checklist
- [ ] Followed [contribution
guide](https://cloudberry.apache.org/contribute/code)
- [ ] Added/updated documentation
- [ ] Reviewed code for security implications
- [ ] Requested review from [cloudberry
committers](https://github.com/orgs/apache/teams/cloudberry-committers)
### Additional Context
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