25 Apr
2017
25 Apr
'17
2:06 a.m.
rm in V6 outsources globbing to /etc/glob, which
appears to report
no-match if the first character is .
Actually, it's the shell that calls glob. Glob then invokes the command
(in this case rm).
Anyhow, that doesn't do what you think it does. It ignores directory
entries that begin with '.' if the search string doesn't begin with ..
".*" will indeed match ".."
Of course, the calamity depends on whether you have /tmp on it's own
filesystem. V6 didn't go .. off the top of the filesystem, the root ..
just linked back to the inode 1 (the root itself).