ref: d8962845f386a27ee7cd488300d2ac25b98adf8b
dir: /sys/src/cmd/upas/imap4d/debug.c/
#include "imap4d.h"
char	logfile[28]	= "imap4";
void
debuglog(char *fmt, ...)
{
	char buf[1024];
	va_list arg;
	if(debug == 0)
		return;
	va_start(arg, fmt);
	vseprint(buf, buf + sizeof buf, fmt, arg);
	va_end(arg);
	syslog(0, logfile, "[%s:%d] %s", username, getpid(), buf);
}
void
ilog(char *fmt, ...)
{
	char buf[1024];
	va_list arg;
	va_start(arg, fmt);
	vseprint(buf, buf + sizeof buf, fmt, arg);
	va_end(arg);
	syslog(0, logfile, "[%s:%d] %s", username, getpid(), buf);
}