simulator: close fd

[fengzeroz]

No description provided.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 56.00000% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 64.93%. Comparing base (1eb1332) to head (0bca9e3).

Files with missing lines	Patch %	Lines
src/parser/neu_json_global_config.c	37.50%	5 Missing ⚠️
simulator/modbus_simulator.c	40.00%	3 Missing ⚠️
plugins/restful/global_config_handle.c	75.00%	2 Missing ⚠️
plugins/modbus/modbus_point.c	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2675      +/-   ##
==========================================
- Coverage   64.95%   64.93%   -0.02%     
==========================================
  Files         125      125              
  Lines       30236    30259      +23     
==========================================
+ Hits        19639    19649      +10     
- Misses      10597    10610      +13     

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