41979f59d3
Functions defined by us are supposed to return negative errno-style errors on errors. laccess() is for access() what lstat() is for stat(), but defined by us as a macro. This led to some confusion regarding error handling. Let's return a negative errno code just in case. This means callers can it use either way: like access(), i.e. checking for a negative return value + looking at errno, or like our own code, i.e. using the negative errno code it returns.
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