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- From: Donn Terry <donn@hpfcdc.uucp>
-
- >IEEE Std 1003.1-1988 paragraph 5.7.1.2 note 5 describes the value
- >returned by pathconf() when _PC_PATH_MAX is used as an argument as,
- >"The maximum length of a relative pathname when the specified
- >directory is the working directory."
-
- >I have tried this on several POSIX.1 systems. None of them seem to
- >enforce the maximum. In fact they all return a constant (say, 1024)
- >even if the path given to pathconf() is already longer than that.
-
- >Is this conforming behavior?
-
- >If it is conforming, how should a portable application determine the
- >longest pathname a user can specify?
-
- This is hard to get a clear reading on from what you have written. It
- could either be sloppy implementation or perfectly conformant.
-
- POSIX specifically permits (in shell notation):
- cd /
- cd <1024 character pathname>
- cd <another such thing>
- ...
-
- There is no longest pathname a user can specify; there is a longest
- one from / and from the current working directory. Pathconf doesn't
- worry about what the cwd is.
-
- >What about _PC_NAME_MAX? May readdir() return a longer name than the
- >value returned by pathconf() for that directory?
-
- It shouldn't. No location relative issues here.
-
- Donn Terry
- (As usual... speaking only for myself.)
-
- Volume-Number: Volume 21, Number 79
-
-