Added explicit file descriptor close (exec 9>&-) in trap handler to prevent
file descriptor leaks. While bash cleans up FDs on exit, explicit closure
is proper practice and prevents potential issues in long-running processes.
Changes:
- trap handler now: flock -u 9; exec 9>&-; rm -f; cleanup
- Ensures FD 9 is explicitly closed before process exit
Impact:
- Prevents potential FD exhaustion in edge cases
- Follows bash best practices
- Zero functional impact
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
cschantz
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