debian 10 ifconfig fix

debian 10 version of net-tools switches its --version output to
stdout from stderr.

Signed-off-by: Lamont Granquist <lamont@scriptkiddie.org>

2 files changed, 56 insertions, 18 deletions

diff --git a/lib/chef/provider/ifconfig.rb b/lib/chef/provider/ifconfig.rb
index 1575127c25..9ba1d5ed46 100644
--- a/lib/chef/provider/ifconfig.rb
+++ b/lib/chef/provider/ifconfig.rb
@@ -39,6 +39,10 @@ class Chef
       attr_accessor :config_template
       attr_accessor :config_path
 
+      # @api private
+      # @return [String] the major.minor of the net-tools version as a string
+      attr_accessor :ifconfig_version
+
       def initialize(new_resource, run_context)
         super(new_resource, run_context)
         @config_template = nil
@@ -54,15 +58,20 @@ class Chef
         @ifconfig_version = nil
 
         @net_tools_version = shell_out("ifconfig", "--version")
+        @net_tools_version.stdout.each_line do |line|
+          if line =~ /^net-tools (\d+\.\d+)/
+            @ifconfig_version = line.match(/^net-tools (\d+\.\d+)/)[1]
+          end
+        end
         @net_tools_version.stderr.each_line do |line|
-          if line =~ /^net-tools (\d+.\d+)/
-            @ifconfig_version = line.match(/^net-tools (\d+.\d+)/)[1]
+          if line =~ /^net-tools (\d+\.\d+)/
+            @ifconfig_version = line.match(/^net-tools (\d+\.\d+)/)[1]
           end
         end
 
         if @ifconfig_version.nil?
           raise "net-tools not found - this is required for ifconfig"
-        elsif @ifconfig_version.to_f < 2.0
+        elsif @ifconfig_version.to_i < 2
           # Example output for 1.60 is as follows: (sanitized but format intact)
           # eth0      Link encap:Ethernet  HWaddr 00:00:00:00:00:00
           #           inet addr:192.168.1.1  Bcast:192.168.0.1  Mask:255.255.248.0
@@ -98,7 +107,7 @@ class Chef
             current_resource.mtu(@interface["mtu"])
             current_resource.metric(@interface["metric"])
           end
-        elsif @ifconfig_version.to_f >= 2.0
+        elsif @ifconfig_version.to_i >= 2
           # Example output for 2.10-alpha is as follows: (sanitized but format intact)
           # eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
           #       inet 192.168.1.1  netmask 255.255.240.0  broadcast 192.168.0.1
diff --git a/spec/unit/provider/ifconfig_spec.rb b/spec/unit/provider/ifconfig_spec.rb
index 38561d6e49..56d2f250a6 100644
--- a/spec/unit/provider/ifconfig_spec.rb
+++ b/spec/unit/provider/ifconfig_spec.rb
@@ -1,6 +1,6 @@
 #
 # Author:: Prajakta Purohit (prajakta@chef.io)
-# Copyright:: Copyright 2008-2018, Chef Software Inc.
+# Copyright:: Copyright 2008-2020, Chef Software Inc.
 # License:: Apache License, Version 2.0
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -46,19 +46,48 @@ describe Chef::Provider::Ifconfig do
       ifconfig 1.42 (2001-04-13)
     EOS
 
-    before do
-      ifconfig = double(stdout: "", exitstatus: 1)
-      allow(@provider).to receive(:shell_out_compacted).and_return(ifconfig)
-      ifconfig_version = double(stdout: "", stderr: net_tools_version, exitstatus: 4)
-      allow(@provider).to receive(:shell_out_compacted).with("ifconfig", "--version").and_return(ifconfig_version)
-      @provider.load_current_resource
-    end
-    it "should track state of ifconfig failure" do
-      expect(@provider.instance_variable_get("@status").exitstatus).not_to eq(0)
-    end
-    it "should thrown an exception when ifconfig fails" do
-      @provider.define_resource_requirements
-      expect { @provider.process_resource_requirements }.to raise_error Chef::Exceptions::Ifconfig
+    let(:net_tools_version2) { StringIO.new <<~EOS }
+      net-tools 2.10-alpha
+    EOS
+
+    context "when ifconfig returns its version on stdout" do
+      before do
+        ifconfig = double(stdout: "", exitstatus: 1)
+        allow(@provider).to receive(:shell_out_compacted).and_return(ifconfig)
+        ifconfig_version = double(stdout: net_tools_version2, stderr: "", exitstatus: 4)
+        allow(@provider).to receive(:shell_out_compacted).with("ifconfig", "--version").and_return(ifconfig_version)
+        @provider.load_current_resource
+      end
+      it "should track state of ifconfig failure" do
+        expect(@provider.instance_variable_get("@status").exitstatus).not_to eq(0)
+      end
+      it "should thrown an exception when ifconfig fails" do
+        @provider.define_resource_requirements
+        expect { @provider.process_resource_requirements }.to raise_error Chef::Exceptions::Ifconfig
+      end
+      it "should grab the correct major.minor version of net-tools" do
+        expect(@provider.ifconfig_version).to eql("2.10")
+      end
+    end
+
+    context "when ifconfig returns its version on stderr" do
+      before do
+        ifconfig = double(stdout: "", exitstatus: 1)
+        allow(@provider).to receive(:shell_out_compacted).and_return(ifconfig)
+        ifconfig_version = double(stdout: "", stderr: net_tools_version, exitstatus: 4)
+        allow(@provider).to receive(:shell_out_compacted).with("ifconfig", "--version").and_return(ifconfig_version)
+        @provider.load_current_resource
+      end
+      it "should track state of ifconfig failure" do
+        expect(@provider.instance_variable_get("@status").exitstatus).not_to eq(0)
+      end
+      it "should thrown an exception when ifconfig fails" do
+        @provider.define_resource_requirements
+        expect { @provider.process_resource_requirements }.to raise_error Chef::Exceptions::Ifconfig
+      end
+      it "should grab the correct major.minor version of net-tools" do
+        expect(@provider.ifconfig_version).to eql("1.60")
+      end
     end
   end
   describe Chef::Provider::Ifconfig, "action_add" do