글쓴이 : 좋은진호 ( http://coffeenix.net/ )

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	제  목 : syslog의 Priority와 Facility 값 작성자 : 좋은진호(truefeel, http://coffeenix.net/ ) 작성일 : 2012.1.9(월) /usr/include/sys/syslog.h (FreeBSD는 /usr/include/syslog.h)파일을 보고 값을 계산했다. 로깅 설정시 숫자로 설정해야할 경우에 사용   /* priorities (these are ordered) */ #define LOG_EMERG       0       /* system is unusable */ #define LOG_ALERT       1       /* action must be taken immediately */ #define LOG_CRIT        2       /* critical conditions */ #define LOG_ERR         3       /* error conditions */ #define LOG_WARNING     4       /* warning conditions */ #define LOG_NOTICE      5       /* normal but significant condition */ #define LOG_INFO        6       /* informational */ #define LOG_DEBUG       7       /* debug-level messages */   LOG_EMERG  = 0 LOG_ALERT  = 1 LOG_CRIT   = 2 LOG_ERR    = 3 LOG_WARNING = 4 LOG_NOTICE = 5 LOG_INFO   = 6 LOG_DEBUG  = 7   /* facility codes */ #define LOG_KERN        (0<<3)  /* kernel messages */ #define LOG_USER        (1<<3)  /* random user-level messages */ #define LOG_MAIL        (2<<3)  /* mail system */ #define LOG_DAEMON      (3<<3)  /* system daemons */ #define LOG_AUTH        (4<<3)  /* security/authorization messages */ #define LOG_SYSLOG      (5<<3)  /* messages generated internally by syslogd */ #define LOG_LPR         (6<<3)  /* line printer subsystem */ #define LOG_NEWS        (7<<3)  /* network news subsystem */ #define LOG_UUCP        (8<<3)  /* UUCP subsystem */ #define LOG_CRON        (9<<3)  /* clock daemon */ #define LOG_AUTHPRIV    (10<<3) /* security/authorization messages (private) */ #define LOG_FTP         (11<<3) /* ftp daemon */ /* other codes through 15 reserved for system use */ #define LOG_LOCAL0      (16<<3) /* reserved for local use */ #define LOG_LOCAL1      (17<<3) /* reserved for local use */ #define LOG_LOCAL2      (18<<3) /* reserved for local use */ #define LOG_LOCAL3      (19<<3) /* reserved for local use */ #define LOG_LOCAL4      (20<<3) /* reserved for local use */ #define LOG_LOCAL5      (21<<3) /* reserved for local use */ #define LOG_LOCAL6      (22<<3) /* reserved for local use */ #define LOG_LOCAL7      (23<<3) /* reserved for local use */   위에서 <<3은 왼쪽으로 3번 shift하라는 것이다. 예를들어 LOG_LOCAL1의 17<<3 은 17(2진수 10001)을 왼쪽으로 3번 shift한다. 즉 2진수 10001000 = 136 LOG_KERN   = 0 LOG_USER   = 8 LOG_MAIL   = 16 LOG_DAEMON = 24 LOG_AUTH   = 32 LOG_SYSLOG = 40 LOG_LPR    = 48 LOG_NEWS   = 56 LOG_UUCP   = 64 LOG_CRON   = 72 LOG_AUTHPRIV =  80 LOG_FTP    =  88 LOG_LOCAL0 = 128 LOG_LOCAL1 = 136 LOG_LOCAL2 = 144 LOG_LOCAL3 = 152 LOG_LOCAL4 = 160 LOG_LOCAL5 = 168 LOG_LOCAL6 = 176 LOG_LOCAL7 = 184   /* * Option flags for openlog. * * LOG_ODELAY no longer does anything. * LOG_NDELAY is the inverse of what it used to be. */ #define LOG_PID         0x01    /* log the pid with each message */ #define LOG_CONS        0x02    /* log on the console if errors in sending */ #define LOG_ODELAY      0x04    /* delay open until first syslog() (default) */ #define LOG_NDELAY      0x08    /* don't delay open */ #define LOG_NOWAIT      0x10    /* don't wait for console forks: DEPRECATED */ #define LOG_PERROR      0x20    /* log to stderr as well */   LOG_PID    = 1 LOG_CONS   = 2 LOG_ODELAY = 4 LOG_NDELAY = 8 LOG_NOWAIT = 16 LOG_PERROR = 32