Hugh McIntyre wrote:
Garrett D'Amore wrote:
3) chown differs primarily in that it uses "." instead of ":" to
delineate the group name from the username. It seems like the
"standard" (Solaris version in /usr/bin) could honor *both* : and .
fairly easily. (I think the xpg4 has to remain the way it is to
avoid breaking compatibility.) Is it even possible that a user or
group name be constructed that contains "."? What are the semantics
of this?
If memory serves, there's an old bug in the Sun bugs database filed
all the way before Solaris 2.0 was released, asking for this change.
Which was actually implemented before being backed out "because a
username could contain a dot".
However, it always seemed to me that you could use an algorithm that said
1. If the argument contains ":", this is the separator.
2. Else if you find a matching username (possibly containing a dot,
although this is unlikely) that matches the whole argument then use
this as a pure username.
3. Else if the argument contains a dot and #2 didn't match, split
into user/group and try again.
This would be a reasonable approach.
Of course if the username *and* the group name both contain a dot...
well the site gets what they deserve.
- Garrett
Hugh.
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