helper function for printing to stderr

awall-cli

@@ -116,6 +116,7 @@ end
 
 util = require('awall.util')
 contains = util.contains
+printmsg = util.printmsg
 
 if not contains(
    {
@@ -283,7 +284,7 @@ if not call(
 
       elseif mode == 'diff' then
 	 if not posix.stat(dumpfile) then
-	    io.stderr:write('Please translate or activate first\n')
+	    printmsg('Please translate or activate first')
 	    os.exit(1)
 	 end
 
@@ -351,15 +352,15 @@ if not call(
 	 if call(config.activate, config) then
 
 	    if not force then
-	       io.stderr:write('New firewall configuration activated\n')
+	       printmsg('New firewall configuration activated')
 	       io.stderr:write('Press RETURN to commit changes permanently: ')
 	       interrupted = not io.read()
 
 	       kill()
 
 	       if interrupted then
-		  io.stderr:write(
-		     '\nActivation canceled, reverting to the old configuration\n'
+		  printmsg(
+		     '\nActivation canceled, reverting to the old configuration'
 		  )
 		  revert()
 	       end
@@ -382,7 +383,7 @@ if not call(
 
 	 posix.sleep(10)
 
-	 io.stderr:write('\nTimeout, reverting to the old configuration\n')
+	 printmsg('\nTimeout, reverting to the old configuration')
 	 iptables.revert()
 
       elseif mode == 'flush' then iptables.flush()

awall/ipset.lua

 --[[
 Ipset file dumper for Alpine Wall
-Copyright (C) 2012-2014 Kaarle Ritvanen
+Copyright (C) 2012-2016 Kaarle Ritvanen
 See LICENSE file for license details
 ]]--
 
 
-local sortedkeys = require('awall.util').sortedkeys
+local util = require('awall.util')
 
 
 local IPSet = require('awall.class')()
@@ -24,13 +24,13 @@ function IPSet:create()
 	 'ipset', '-!', 'create', name, table.unpack(ipset.options)
       )
       if lpc.wait(pid) ~= 0 then
-	 io.stderr:write('ipset creation failed: '..name)
+	 util.printmsg('ipset creation failed: '..name)
       end
    end
 end
 
 function IPSet:print()
-   for _, name in sortedkeys(self.config) do
+   for _, name in util.sortedkeys(self.config) do
       self:dumpfile(name, io.output())
       io.write('\n')
    end

awall/iptables.lua

 --[[
 Iptables file dumper for Alpine Wall
-Copyright (C) 2012-2014 Kaarle Ritvanen
+Copyright (C) 2012-2016 Kaarle Ritvanen
 See LICENSE file for license details
 ]]--
 
@@ -9,6 +9,7 @@ local class = require('awall.class')
 local raise = require('awall.uerror').raise
 
 local util = require('awall.util')
+local printmsg = util.printmsg
 local sortedkeys = util.sortedkeys
 
 
@@ -71,9 +72,7 @@ function BaseIPTables:restore(test)
 
 	 disabled = false
 
-      elseif test then
-	 io.stderr:write('Warning: '..family..' rules not tested\n')
-      end
+      elseif test then printmsg('Warning: '..family..' rules not tested') end
    end
 
    if disabled then raise('Firewall not enabled in kernel') end
@@ -159,11 +158,7 @@ function M.flush()
 	       for i, chain in ipairs(M.builtin[tbl]) do
 		  empty.config[family][tbl][chain] = {}
 	       end
-	    else
-	       io.stderr:write(
-		  'Warning: not flushing unknown table: '..tbl..'\n'
-	       )
-	    end
+	    else printmsg('Warning: not flushing unknown table: '..tbl) end
 	 end
       end
    end

awall/model.lua

 --[[
 Base data model for Alpine Wall
-Copyright (C) 2012-2015 Kaarle Ritvanen
+Copyright (C) 2012-2016 Kaarle Ritvanen
 See LICENSE file for license details
 ]]--
 
@@ -84,7 +84,7 @@ end
 function M.ConfigObject:error(msg) raise(self.location..': '..msg) end
 
 function M.ConfigObject:warning(msg)
-   io.stderr:write(self.location..': '..msg..'\n')
+   util.printmsg(self.location..': '..msg)
 end
 
 function M.ConfigObject:trules() return {} end

awall/uerror.lua

 --[[
 User error handling for Alpine Wall
-Copyright (C) 2012-2014 Kaarle Ritvanen
+Copyright (C) 2012-2016 Kaarle Ritvanen
 See LICENSE file for license details
 ]]--
 
 
+local printmsg = require('awall.util').printmsg
+
+
 local M = {}
 
 local prefix = 'awall user error: '
@@ -18,8 +21,8 @@ function M.call(f, ...)
       function(msg)
 	 local si, ei = msg:find(prefix, 1, true)
 	 if si then msg = 'awall: '..msg:sub(ei + 1, -1) end
-   	 io.stderr:write(msg..'\n')
-   	 if not si then io.stderr:write(debug.traceback()..'\n') end
+	 printmsg(msg)
+	 if not si then printmsg(debug.traceback()) end
       end
    )
 end

awall/util.lua

 --[[
 Utility module for Alpine Wall
-Copyright (C) 2012-2015 Kaarle Ritvanen
+Copyright (C) 2012-2016 Kaarle Ritvanen
 See LICENSE file for license details
 ]]--
 
@@ -142,4 +142,7 @@ end
 
 function M.printtabular(tbl) M.printtabulars({tbl}) end
 
+
+function M.printmsg(msg) io.stderr:write(msg..'\n') end
+
 return M