Move the TSN namespace (Xml.hs and FeedHosts.hs) into the top level.

[dead/htsn.git] / src / Logging.hs

diff --git a/src/Logging.hs b/src/Logging.hs
index 8e80ac96414e7f5ad8bfc9d6cdd278bfde641acd..63101c6f3735da2dbbbc1b913ae6ec1bc7719105 100644 (file)
--- a/src/Logging.hs
+++ b/src/Logging.hs
@@ -7,6 +7,7 @@ module Logging (
 where
 
 import Control.Monad ( when )
+import System.Environment ( getProgName )
 import System.Log.Formatter ( simpleLogFormatter )
 import System.Log.Handler ( setFormatter )
 import System.Log.Handler.Simple ( GenericHandler, fileHandler )
@@ -26,20 +27,30 @@ import System.Log.Logger (
   warningM )
 
 
+-- | Log a message at the DEBUG level.
 log_debug :: String -> IO ()
 log_debug = debugM rootLoggerName
 
+-- | Log a message at the ERROR level.
 log_error :: String -> IO ()
 log_error = errorM rootLoggerName
 
+-- | Log a message at the INFO level.
 log_info :: String -> IO ()
 log_info = infoM rootLoggerName
 
+-- | Log a message at the WARNING level.
 log_warning :: String -> IO ()
 log_warning = warningM rootLoggerName
 
 
--- | Why don't we take a Configuration as an argument? Because it
+-- | Set up the logging. All logs are handled by the global "root"
+--   logger provided by HSLogger. We remove all of its handlers so
+--   that it does nothing; then we conditionally add back two handlers
+--   -- one for syslog, and one for a normal file -- dependent upon
+--   the 'syslog' and 'log_file' configuration items.
+--
+--   Why don't we take a Configuration as an argument? Because it
 --   would create circular imports!
 init_logging :: Maybe FilePath -> Priority -> Bool -> IO ()
 init_logging log_file log_level syslog = do
@@ -57,7 +68,9 @@ init_logging log_file log_level syslog = do
     sl_handler' <- openlog rootLoggerName [] USER sl_level
 
     -- Syslog should output the date by itself.
-    let sl_formatter = simpleLogFormatter "htsn[$pid] $prio: $msg"
+    program_name <- getProgName
+    let sl_formatter = simpleLogFormatter $
+                         program_name ++ "[$pid] $prio: $msg"
     let sl_handler = setFormatter sl_handler' sl_formatter
 
     updateGlobalLogger rootLoggerName (addHandler sl_handler)