class logbuf

Public Methods

•  logbuf (int loglevel, int fd = -1)
• void  setOn (bool newstate)
• void  setLevel (int newlevel)
• bool  on ()
• int  level ()
• int  overflow (int c = EOF)

Detailed Description

A streambuffer, logging via syslog

logbuf can be used, if you want to use syslog for logging but don't want to change all your nice C++-style output statements in your code.

Here is an example showing the usage of logbuf:

	openlog("myDaemon", LOG_CONS|LOG_PID, LOG_DAEMON);
	logbuf ebuf(LOG_ERR, 2);
	ostream lerr(&ebuf);

	... some code ...

	lerr << "Whoops, got an error" << endl;

The second optional argument of the constructor can be used to switch the output destination between syslog and some file. If it is omitted or set to -1, logging can be switched on or off. The initial state is on.

Constructs a new instance.

Parameters:

loglevel	The log level for this instance. see syslog(3) for symbolic names to use.
fd	An optional file descriptor to use if switched off.

Switches loggin on or off.

Parameters:

newstate

The desired state.

Modifies the loglevel of this instance.

Parameters:

newlevel

The new loglevel.

Retrieve the current state.

Returns: The current state.

Retrieves the current loglevel.

Returns: The current loglevel.

Called by the associated ostream to write a character. Stores the character in a buffer and calls syslog(level, buffer) whenever a LF is seen.