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The same issue on rhel-6.

iproute-2.6.32-45.el6

+++ This bug was initially created as a clone of Bug #1265238 +++

Description of problem:

ss returns zero (ok) when invalid option is added.


Version-Release number of selected component (if applicable):

iproute-3.10.0-54.el7


How reproducible:

100%


Steps to Reproduce:

# ss --blabla && echo "OK" || echo "FAIL"
ss: unrecognized option '--blabla'
...
OK


Actual results:

Program returns zero.


Expected results:

Program returns non-zero.


Additional info:

Bug is consistent with upstream, patch sent:

http://marc.info/?l=linux-netdev&m=144493568522690&w=2

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-0895.html