closelog

Closes the log file.

openlog ident, logopt, facility

Opens the log file. Takes the following arguments:

ident

Prepended to every message

logopt

Logging options, containing one or more of:

cons

Writes messages to system console if they can't be sent to syslogd

ndelay

Opens the connection immediately

nowait

Doesn't wait for child processes before logging messages to the console

pid

Logs process ID

facility

Specifies the part of the system making the log entry

setlogmask mask_priority

Sets log mask to mask_priority and returns the old mask.

syslog priority, mask, format, args

If priority and mask permit, logs message formed as if by sprintf(format, args), with the addition that %m is replaced with the current error message from $!.