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SubjectRe: Redundant syscalls?
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> I was wondering why do we need fsetxattr(2), fgetxattr(2) etc when we
> already have setxattr(2), getxattr(2) etc working on file names
> instead of file descriptors.
> truncate(2)/ftruncate(2) is another more traditional example.

Atomic actions.

Consider the case of a file that doesn't exist yet. first you
open it, then perform the fsetxattr. If you use the name, then it becomes
possible to rename the file and substitute a different one before the
setxattr. Now, the open file will be missing the attribute(s).
Jesse I Pollard, II

Any opinions expressed are solely my own.
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