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lib/replace - add extra check to bsd_attr_list

The FreeBSD extattr API may return success and truncated namelist. We need to check for this in bsd_attr_list to ensure that we don't accidentally read off the end of the buffer. In the case of a truncated value, the pascal strings for attr names will reflect the lengths as if the value were not truncated. For example: 58DosStrea

In case of short read we now set error to ERANGE and fail.


I'm uncertain about best errno to set here, but ERANGE seemed sensible.


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  • Test suite updated with functionality tests
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Reviewer's checklist:

  • There is a test suite reasonably covering new functionality or modifications
  • Function naming, parameters, return values, types, etc., are consistent and according to
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Edited by Andrew Walker

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