#include <sys/syslog.h>
sys/syslog.h
48 macros · 5 functions
#define _PATH_LOG "/var/run/syslog"
priorities/facilities are encoded into a single 32-bit quantity, where the
bottom 3 bits are the priority (0-7) and the top 28 bits are the facility
(0-big number). Both the priorities and the facilities map roughly
one-to-one to strings in the syslogd(8) source code. This mapping is
included in this file.
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
#define LOG_PRIMASK 0x07
mask to extract priority part (internal)
#define LOG_MAKEPRI(fac, pri) ((fac) | (pri))
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)
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)
authorization messages (private)
Facility #10 clashes in DEC UNIX, where
it's defined as LOG_MEGASAFE for AdvFS
event logging.
#define LOG_FTP (11<<3)
ftp daemon
#define LOG_NTP (12<<3) /* NTP subsystem */
#define LOG_SECURITY (13<<3) /* security subsystems (firewalling, etc.) */
#define LOG_CONSOLE (14<<3) /* /dev/console output */
#define LOG_NETINFO (12<<3)
NetInfo
#define LOG_REMOTEAUTH (13<<3)
remote authentication/authorization
#define LOG_INSTALL (14<<3)
installer subsystem
#define LOG_RAS (15<<3)
Remote Access Service (VPN / PPP)
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
#define LOG_LAUNCHD (24<<3)
launchd - general bootstrap daemon
#define LOG_NFACILITIES 25
current number of facilities
#define LOG_FACMASK 0x03f8
mask to extract facility part
facility of pri
#define LOG_FAC(p) (((p) & LOG_FACMASK) >> 3)
arguments to setlogmask.
#define LOG_MASK(pri) (1 << (pri))
mask for one priority
#define LOG_UPTO(pri) ((1 << ((pri)+1)) - 1)
all priorities through pri
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
void closelog(void)
man page · June 4, 1993
closelog(3) — control system log
void openlog(const char *, int, int)
man page · June 4, 1993
openlog(3) — control system log
__DARWIN_ALIAS_STARTING(__MAC_10_13, __IPHONE_NA, __DARWIN_EXTSN(syslog)) __printflike(2, 3) __not_tail_called
void syslog(int, const char *, ...)
man page · June 4, 1993
syslog(3) — control system log
__printflike(2, 0) __not_tail_called
void vsyslog(int, const char *, __darwin_va_list)
man page · June 4, 1993
vsyslog(3) — control system log