More robust handling of filenames, paritucalrly errors about too long

[nstiurca]

On my system, I'm actually triggering the ENAMETOOLONG error code with strings of length ~150 characters. Not sure why, but I re-wrote the code based on the suggestion in the upstream bug.

[codecov[bot]]

Codecov Report

Patch coverage: 87.50% and project coverage change: -0.02 :warning:

Comparison is base (e33786c) 89.69% compared to head (ec5fd2c) 89.67%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #264      +/-   ##
==========================================
- Coverage   89.69%   89.67%   -0.02%     
==========================================
  Files          10       10              
  Lines        1775     1782       +7     
==========================================
+ Hits         1592     1598       +6     
- Misses        183      184       +1     

Impacted Files	Coverage Δ
src/utils.jl	89.20% <85.71%> (-0.27%)	:arrow_down:
src/read.jl	88.73% <100.00%> (+0.03%)	:arrow_up:

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