jonpryor at vt.edu
Sat Oct 2 09:50:14 EDT 2004
On Fri, 2004-10-01 at 06:01, Robert Brown wrote:
> I did a google search on mono and syslog and found a quick example
> Between what you listed below and the webpage that google pulled up
> should get me started.
It's nice to know that my examples can be useful. :-)
One word of note (as I re-read my earlier message): the Level
enumeration really shouldn't have a [Flags] attribute, as its values
can't be bitwise-ORed together.
> > [DllImport("libc"
> > static extern void syslog(int priority, string format, params
> > string args);
This is also an incredibly bad idea. The reason being that syslog(3) is
void syslog (int priority, const char *format, ...);
A C# params array isn't going to be properly translated into a C varargs
argument ("..."), as a params array is still just an array (with
additional "syntactic sugar" for callers), and the array will be
marshaled as a single argument.
It would be better to stick with my original DllImport declaration:
public static extern void syslog (int priority, string message);
Though, to be *really* safe, this would be better:
private static extern void sys_syslog (int priority,
public static void syslog (int priority, string message)
message = message.Replace ("%", "%%");
sys_syslog (priority, message);
This way, syslog(3) won't ever see formattable parameters that would be
passed on the stack (which is good, as *no* parameters will be passed on
the stack after "message", so this avoids reading garbage).
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