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#include <syslog.h>
The <syslog.h> header defines the following symbolic constants, zero or more of which can be OR'ed together to form the logopt option of openlog(): LOG_PID
Log the process ID with each message.
Log to the system console on error.
Connect to syslog daemon immediately.
Delay open until syslog() is called.
Do not wait for child processes.
The following symbolic constants are defined as possible values of the facility argument to openlog(): LOG_KERN
reserved for message generated by the system
message generated by a process
reserved for message generated by mail system
reserved for message generated by news system
reserved for message generated by UUCP system
reserved for message generated by system daemon
reserved for message generated by authorization daemon
reserved for message generated by clock daemon
reserved for message generated by printer system
reserved for local use
reserved for local use
reserved for local use
reserved for local use
reserved for local use
reserved for local use
reserved for local use
reserved for local use
The following is declared as a macro for constructing the maskpri argument to setlogmask(). The following macro expands to an expression of type int when the argument pri is an expre ssion of type int: LOG_MASK(pri)
a mask for priority pri
The following constants are defined as possible values for the priority argument of syslog(): LOG_EMERG
A panic condition was reported to all processes.
A condition that should be corrected immediately.
A critical condition.
An error message.
A warning message.
A condition requiring special handling.
A general information message.
A message useful for debugging programs.
See attributes(5) for descriptions of the following attributes:
| ATTRIBUTE TYPE ATTRIBUTE VALUE |
| Interface Stability Standard |
syslog(3C), attributes(5), standards(5)