[Bug 1400357] Re: zero file called 0 created in $HOME each time Ubuntu DVD is inserted

[Steve Langasek]

The right fix is to use the -gt operator, not >.

It may be a bug on the part of dash to interpret this as shell
redirection in between '[' and ']', but I'm not sure of that, and in any
case the right operator is -gt.

Brian, could you fix this?

** Changed in: update-notifier (Ubuntu)
       Status: New => Triaged

** Changed in: update-notifier (Ubuntu)
     Assignee: (unassigned) => Brian Murray (brian-murray)

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Title:
  zero file called 0 created in $HOME each time Ubuntu DVD is inserted

Status in update-notifier package in Ubuntu:
  Triaged

Bug description:
  I noticed that weird file called 0 (zero), and empty, in my home directory.
  I deleted it and it came back !

  then i used auditd to find out what process was creating such a file, so I used
  auditctl -w /home/zebul666/0 -p wa -k home-zero-file

  and to make it permanent I added the line "-w /home/zebul666/0 -p wa
  -k home-zero-file" in /etc/audit/rules.d/audit.rules

  and wait.

  and I had a hit with ausearch -k home-zeo-file showed me

  time->Sat Nov 22 23:42:41 2014
  type=PROCTITLE msg=audit(1416696161.454:19183): proctitle=2F62696E2F7368002D65002F70726F632F73656C662F66642F39
  type=PATH msg=audit(1416696161.454:19183): item=1 name="0" inode=11535138 dev=fc:01 mode=0100664 ouid=1000 ogid=1000 rdev=00:00 nametype=CREATE
  type=PATH msg=audit(1416696161.454:19183): item=0 name="/home/zebul666" inode=11534337 dev=fc:01 mode=040700 ouid=1000 ogid=1000 rdev=00:00 nametype=PARENT
  type=CWD msg=audit(1416696161.454:19183):  cwd="/home/zebul666"
  type=SYSCALL msg=audit(1416696161.454:19183): arch=c000003e syscall=2 success=yes exit=3 a0=7f0c68b8ab08 a1=241 a2=1b6 a3=0 items=2 ppid=22150 pid=28635 auid=4294967295 uid=1000 gid=1000 euid=1000 suid=1000 fsuid=1000 egid=1000 sgid=1000 fsgid=1000 tty=(none) ses=4294967295 comm="sh" exe="/bin/dash" key="home-zero-file"

  the process with pid 28635 was gone but more interestingly I noticed
  that the PPID 22150 is the one for upstart !

  so it's a script launched by upstart
  and I noticed in my /var/log/syslog at the approx. same time

  Nov 22 23:42:30 callisto udisksd[3502]: Mounted /dev/sr0 at
  /media/zebul666/Ubuntu 14.10 amd64 on behalf of uid 1000

  I don't know which script is run by upstart at dvd insertion but there
  is a bug in it that creates a empty zero file in home when you insert
  a ubuntu DVD

  running ubuntu 14.10 amd64

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