Syslog handler doesn't work with metalog

Question

Syslog handler doesn't work with metalog

Opened this issue 11 years ago · 5 comments

I use metalog http://metalog.sourceforge.net/ on my development machines so I don't have to fiddle with logrotate all the time. I noticed that the following doesn't log anything when using metalog:

  Prelude> :set prompt "ghci> "
  ghci> :m +System.Log.Logger
  ghci> :m +System.Log.Handler.Syslog
  ghci> sl <- openlog rootLoggerName [] USER DEBUG
  ghci> updateGlobalLogger rootLoggerName (addHandler sl)
  ghci> errorM rootLoggerName "This won't show up with metalog."

If however I stop metalog and start syslog-ng, everything works as expected.

Answer 1 · 2024-02-04T17:19:55.000Z

Still an issue with 1.3.1.0.

Answer 2 · 2024-02-04T17:24:25.000Z

[pid 26413] connect(4, {sa_family=AF_UNIX, sun_path="/dev/log"}, 110) = -1 EPROTOTYPE (Protocol wrong type for socket)

Answer 3 · 2024-02-04T17:31:52.000Z

The problematic code is at https://github.com/haskell-hvr/hslogger/blob/master/src/System/Log/Handler/Syslog.hs#L185

Answer 4 · 2024-02-04T17:57:07.000Z

Okay, nvm: after patching up opening it fails the same way, gotta investigate more.

Answer 5 · 2024-02-04T18:29:12.000Z

metalog doesn't like the syntax of messages sent by hslogger, not sure why: i don't understand how it relates to the Syslog Protocol RFC, since seems like neither logger(1) nor hslogger emit compliant messages, but metalog is satisfied by the former's.