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- From: djm@eng.umd.edu (David J. MacKenzie)
-
- In article <439@usenix.ORG> ast@cs.vu.nl (Andy Tanenbaum) writes:
-
- (1) If the destination path exists:
-
- (b) If the permissions of the file to which the destination path
- refers to do not permit writing, actions are performed equivalent to
- the unlink() #5.5.1[POSIX.1] function call using destination as the
- path argument, and, if this fails for any reason...
-
- Now, this behavior might be correct, but is this effect really intended by
- P1003.2? Possibly, the user that wish to replace the dstfile entirely (as
- opposed to overwriting it) should use rm BEFORE calling cp, and the -f option
- should be used only to suppress interaction with the user.
-
- Maybe draft 10 clarifies the situation?
-
- In draft 10, cp never ever unlinks files.
- In draft 10, all -f does in cp is turn off a previous -i.
- I'm going to object to this on the FSF ballot; I think -f should make
- it unlink (unconditionally), like it does for mv, ln, and rm, or else
- not be specified at all in the standard, since it's not existing
- practice.
-
- --
- David J. MacKenzie <djm@eng.umd.edu> <djm@ai.mit.edu>
-
- Volume-Number: Volume 21, Number 42
-
-