fclose() -> pclose()

[davidpanderson]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 10.76%. Comparing base (c81ac94) to head (e04484d).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
lib/util.cpp	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #5863   +/-   ##
=========================================
  Coverage     10.76%   10.76%           
  Complexity     1068     1068           
=========================================
  Files           280      280           
  Lines         36494    36494           
  Branches       8444     8444           
=========================================
  Hits           3930     3930           
  Misses        32175    32175           
  Partials        389      389           

Files with missing lines	Coverage Δ
lib/util.cpp	31.96% <0.00%> (ø)