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require 'logger'
require 'syslog'
module Byteback
#
# Translates Ruby's Logger calls to similar calls to Syslog
# (implemented in Ruby 2.0 as Syslog::Logger).
#
# We need to neuter % signs which are taken as format strings.
#
class SyslogProxy
class << self
def debug(m)
log_nopc(Syslog::LOG_DEBUG, m)
end
def info(m)
log_nopc(Syslog::LOG_INFO, m)
end
def warn(m)
log_nopc(Syslog::LOG_WARNING, m)
end
def error(m)
log_nopc(Syslog::LOG_ERR, m)
end
#
# syslog(3) says:
#
# LOG_EMERG means "system is unusable"
# LOG_ERR means "error conditions"
#
# Errors might be fatal to Byteback, but they're unlikely to make the
# whole server unusable. So lets dial this down to ERR from EMERG.
#
def fatal(m)
log_nopc(Syslog::LOG_ERR, m)
end
def log_nopc(level, m)
Syslog.log(level, m.gsub('%', '%%'))
end
end
end
# Log proxy class that we can include in our scripts for some simple
# logging defaults.
#
module Log
@@me = File.expand_path($PROGRAM_NAME).split('/').last
#
# If we're running interactively then we have simple logging.
#
if STDIN.tty?
#
# We log to the console.
#
logger = Logger.new(STDERR)
logger.level = Logger::DEBUG
logger.formatter = proc { |severity, _datetime, _progname, msg|
if severity == 'FATAL' || severity == 'ERROR'
"*** #{msg}\n"
else
"#{msg}\n"
end
}
@@logger = logger
else
#
# Otherwise we log via our Syslog-proxy.
#
Syslog.open(@@me)
@@logger = SyslogProxy
end
def debug(*a)
@@logger.__send__(:debug, *a)
end
def info(*a)
@@logger.__send__(:info, *a)
end
def warn(*a)
@@logger.__send__(:warn, *a)
end
def fatal(*a)
@@logger.__send__(:fatal, *a)
exit 1
end
def error(*a)
@@logger.__send__(:error, *a)
end
end
end
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