In uidgid_get.c there is a parse_chown_usergroup_or_die() function which
continues to implement a very old BSD(?) notation of user.group as well as
user:group -- the code assumes that the first "." is a separater.
I don't know what else calls it but, for the chown applet, the implementation
precludes support of users with "."s in (such as "test.test") when invoked with
"chown test.test file":
# chown test.test /tmp/test
chown: unknown user/group test:test
https://github.com/mirror/busybox/blame/master/libpwdgrp/uidgid_get.c#L96
There is no reference to this interpretation in the code comment of the usage
string:
Usage: chown [-RhLHPcvf]... USER[:[GRP]] FILE...
The best (dirtiest?) workaround for this appears to be:
chown $(getent passwd test.test | cut -d: -f 3,4) /tmp/test
Given that this notation appears to have been deprecated back in 2001, is now
the time to remove this?
--
Matthew
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