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Bug 1531290

Summary: Evil sed command in iptables.spec file
Product: Red Hat Enterprise Linux 7 Reporter: Rolf Fokkens <rolf>
Component: iptablesAssignee: Phil Sutter <psutter>
Status: CLOSED ERRATA QA Contact: Tomas Dolezal <todoleza>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.4CC: atragler, iptables-maint-list, todoleza
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: iptables-1.4.21-27.el7 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2018-10-30 09:38:43 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Rolf Fokkens 2018-01-04 22:30:29 UTC
Description of problem:
The iptables.spec file contains the following line:

  sed -i -e 's;^\(After=.*\)$;Before=ip6tables.service\n\1;' %{SOURCE3}

This has the evil side effect of changing a sources file of the RPM. When building with mock this may not be an issue, but it is an issue in the following situation:

  rpmbuild -bb iptables.spec (this has a side effect)
  rpmbuild -bs iptables.spec (now the side effect is in the resulting src.rpm)

A better way might be this:

  # install systemd service files
  install -d -m 755 %{buildroot}/%{_unitdir}
  sed -e 's;iptables;ip6tables;g' \
      -e 's;IPv4;IPv6;g' \
      -e 's;/usr/libexec/ip6tables;/usr/libexec/iptables;g' \
      -e 's;^\(After=.*\)$;\1,iptables.service;' \
      < %{SOURCE3} > ip6tables.service
  sed -e 's;^\(After=.*\)$;Before=ip6tables.service\n\1;' %{SOURCE3} > iptables.service
  install -c -m 644 iptables.service %{buildroot}/%{_unitdir}
  install -c -m 644 ip6tables.service %{buildroot}/%{_unitdir}

So instead of changing the source file, just create an in between file and move on from there

Version-Release number of selected component (if applicable):
iptables-1.4.21-18.2.el7_4

How reproducible:
100%

Steps to Reproduce:
1. rpm -i iptables-1.4.21-18.2.el7_4.src.rpm
2. rpmbuild -bb iptables.spec
3. rpmbuild -bs iptables.spec
4. Enjoy corrupted src.rpm

Actual results:
Accident waiting to happen

Expected results:
Happy RPM building

Additional info:
I would assume there are quality guidelines against this, but I'm not sure

Comment 2 Rolf Fokkens 2018-04-02 15:03:23 UTC
Well, it happened again (still?) : same issue in iptables-1.4.21-18.3.el7_4.src.rpm

I'm not sure, but I think we should consider this bad practice:
* Unwanted side effects
* Unneeded

Comment 3 Phil Sutter 2018-04-04 21:14:19 UTC
Hi Rolf,

(In reply to Rolf Fokkens from comment #2)
> Well, it happened again (still?) : same issue in
> iptables-1.4.21-18.3.el7_4.src.rpm
> 
> I'm not sure, but I think we should consider this bad practice:
> * Unwanted side effects
> * Unneeded

Thanks for your detailed report. Sadly this ticket didn't make it into RHEL7.5 due to missing capacity on QE side. We will reconsider for RHEL7.6.

Thanks, Phil

Comment 8 errata-xmlrpc 2018-10-30 09:38:43 UTC
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://access.redhat.com/errata/RHBA-2018:3093