log系统级别log syslog openlog closelog vsylog

Linux log路径/var/log系统级别log syslog openlog closelog vsylog

主要有两个问题：1：Linux系统log的路径 /var/log2: 系统级别log API：#include void openlog（const char *ident, int option, int facility）;
void syslog（int priority, const char *format, ...）;
void closelog（void）;#include void vsyslog（int priority, const char *format, va_list ap）;