NAME

syslog.h — definitions for system error logging

SYNOPSIS

^[XSI] #include <syslog.h>

DESCRIPTION

The <syslog.h> header shall define the following symbolic constants, zero or more of which may be OR'ed together to form the logopt option of openlog():

LOG_PID

Log the process ID with each message.

LOG_CONS

Log to the system console on error.

LOG_NDELAY

Connect to syslog daemon immediately.

LOG_ODELAY

Delay open until syslog() is called.

LOG_NOWAIT

Do not wait for child processes.

The <syslog.h> header shall define the following symbolic constants for use as the facility argument to openlog():

LOG_KERN

Reserved for message generated by the system.

LOG_USER

Message generated by a process.

LOG_MAIL

Reserved for message generated by mail system.

LOG_NEWS

Reserved for message generated by news system.

LOG_UUCP

Reserved for message generated by UUCP system.

LOG_DAEMON

Reserved for message generated by system daemon.

LOG_AUTH

Reserved for message generated by authorization daemon.

LOG_CRON

Reserved for message generated by clock daemon.

LOG_LPR

Reserved for message generated by printer system.

LOG_LOCAL0

Reserved for local use.

LOG_LOCAL1

Reserved for local use.

LOG_LOCAL2

Reserved for local use.

LOG_LOCAL3

Reserved for local use.

LOG_LOCAL4

Reserved for local use.

LOG_LOCAL5

Reserved for local use.

LOG_LOCAL6

Reserved for local use.

LOG_LOCAL7

Reserved for local use.

The <syslog.h> header shall define the following macros for constructing the maskpri argument to setlogmask(). The following macros expand to an expression of type int when the argument pri is an expression of type int:

LOG_MASK(pri)

A mask for priority pri.

LOG_UPTO(pri)

A mask for all priorities from LOG_EMERG through pri inclusive in the order listed in the list of priority symbolic constants below. Any additional implementation-defined priorities not included in the list below shall not be included in the mask.

The <syslog.h> header shall define the following symbolic constants for use as the severity level portion of the priority argument of syslog() and the pri argument of the LOG_MASK(pri) and LOG_UPTO(pri) macros:

LOG_EMERG

A panic condition was reported to all processes.

LOG_ALERT

A condition that should be corrected immediately.

LOG_CRIT

A critical condition.

LOG_ERR

An error message.

LOG_WARNING

A warning message.

LOG_NOTICE

A condition requiring special handling.

LOG_INFO

A general information message.

LOG_DEBUG

A message useful for debugging programs.

The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided.

void  closelog(void);
void  openlog(const char *, int, int);
int   setlogmask(int);
void  syslog(int, const char *, ...);

APPLICATION USAGE

None.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

XSH closelog

CHANGE HISTORY

First released in Issue 4, Version 2.

Issue 5

Moved from X/Open UNIX to BASE.

Issue 7

This reference page is clarified with respect to macros and symbolic constants.

Issue 8

Austin Group Defect 1033 is applied, adding the LOG_UPTO macro.