[MacPorts] #57611: consider adding faccessat (and likely a number of other *at functions) to 10.9 and less

[MacPorts]

#57611: consider adding faccessat (and likely a number of other *at functions) to
10.9 and less
-----------------------------+----------------------
  Reporter:  kencu           |      Owner:  kencu
      Type:  enhancement     |     Status:  assigned
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:
Resolution:                  |   Keywords:
      Port:  legacy-support  |
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Comment (by kencu):

 gnulib (GPL3+)
 <https://github.com/coreutils/gnulib/blob/master/lib/faccessat.c>

 Apple Open Source (APSL 2.0) (much more complicated version)
 <https://github.com/apple/darwin-
 xnu/blob/master/bsd/vfs/vfs_syscalls.c#L5476>

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Ticket URL: <https://trac.macports.org/ticket/57611#comment:2>
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