syslogd: extended configuration options

This commit adds the option 'services.syslogd.defaultConfig', which is
the main syslog.conf file used by the daemon. Like before, That file can
be extended by means of 'services.syslogd.extraConfig'. Users who want a
completely different configuration, however, can re-define defaultConfig
to their liking.

Furthermore, the option services.syslogd.tty' is now optional: setting
its value to the empty string "" disables logging to TTY altogether.

svn path=/nixos/trunk/; revision=27769

1 files changed, 27 insertions, 11 deletions

diff --git a/modules/services/logging/syslogd.nix b/modules/services/logging/syslogd.nix
index 64b158742ec..f6eb914b66e 100644
--- a/modules/services/logging/syslogd.nix
+++ b/modules/services/logging/syslogd.nix
@@ -4,9 +4,15 @@ with pkgs.lib;
 
 let
 
+  cfg = config.services.syslogd;
+
   syslogConf = pkgs.writeText "syslog.conf" ''
-    kern.warning;*.err;authpriv.none /dev/${config.services.syslogd.tty}
+    ${if (cfg.tty != "") then "kern.warning;*.err;authpriv.none /dev/${cfg.tty}" else ""}
+    ${cfg.defaultConfig}
+    ${cfg.extraConfig}
+  '';
 
+  defaultConf = ''
     # Send emergency messages to all users.
     *.emerg                       *
 
@@ -19,44 +25,54 @@ let
     *.crit                        /var/log/warn
 
     *.*;mail.none;local1.none    -/var/log/messages
-
-    ${config.services.syslogd.extraConfig}
   '';
-
 in
 
 {
   ###### interface
 
   options = {
-  
+
     services.syslogd = {
 
       tty = mkOption {
+        type = types.string;
         default = "tty10";
         description = ''
           The tty device on which syslogd will print important log
-          messages.
+          messages. Leave this option blank to disable tty logging.
+        '';
+      };
+
+      defaultConfig = mkOption {
+        type = types.string;
+        default = defaultConf;
+        description = ''
+          The default <filename>syslog.conf</filename> file configures a
+          fairly standard setup of log files, which can be extended by
+          means of <varname>extraConfig</varname>.
         '';
       };
 
       extraConfig = mkOption {
+        type = types.string;
         default = "";
         example = "news.* -/var/log/news";
         description = ''
-          Additional text appended to <filename>syslog.conf</filename>.
+          Additional text appended to <filename>syslog.conf</filename>,
+          i.e. the contents of <varname>defaultConfig</varname>.
         '';
       };
-      
+
     };
-    
+
   };
 
 
   ###### implementation
 
   config = {
-  
+
     jobs.syslogd =
       { description = "Syslog daemon";
 
@@ -70,5 +86,5 @@ in
       };
 
   };
-  
+
 }