Re: Who changes /bin/ping on my system ?

[Brian <ad44@cityscape.co.uk>]

On Wed 05 Mar 2014 at 10:37:44 +1100, Scott Ferguson wrote:

> There still remains the problem of why does it stop working. Bugreport?

If the OP had an explanation for his /bin/ping in reality being
/bin/ping6 it might lead to a reason for his /bin/ping(6) losing its
capabilities. We then might not have to think in terms of a bug.

For example:

  root@testing-jan20:~# getcap /bin/ping
  /bin/ping = cap_net_raw+ep

  root@testing-jan20:~# cp /bin/ping /bin/myping

  root@testing-jan20:~# getcap /bin/myping
  root@testing-jan20:~#

  brian@testing-jan20:~$ ping -c5 www.debian.org
  PING www.debian.org (5.153.231.4) 56(84) bytes of data.
  64 bytes from senfter.debian.org (5.153.231.4): icmp_seq=1 ttl=55 time=44.4 ms
  64 bytes from senfter.debian.org (5.153.231.4): icmp_seq=2 ttl=55 time=43.8 ms
  64 bytes from senfter.debian.org (5.153.231.4): icmp_seq=3 ttl=55 time=43.9 ms
  64 bytes from senfter.debian.org (5.153.231.4): icmp_seq=4 ttl=55 time=44.2 ms
  64 bytes from senfter.debian.org (5.153.231.4): icmp_seq=5 ttl=55 time=44.0 ms

  --- www.debian.org ping statistics ---
  5 packets transmitted, 5 received, 0% packet loss, time 4005ms
  rtt min/avg/max/mdev = 43.885/44.125/44.458/0.307 ms

  brian@testing-jan20:~$ myping -c5 www.debian.org
  ping: icmp open socket: Operation not permitted

Capabilities are preserved using mv.