syslog(3lua)
- NetBSD Manual Pages
SYSLOG(3lua) LOCAL SYSLOG(3lua)
NAME
syslog -- access syslog(3) functionality from Lua
SYNOPSIS
local syslog = require 'syslog'
syslog.openlog(ident, logopt, facility)
syslog.syslog(priority, message)
syslog.closelog()
oldmask = syslog.setlogmask(maskpri)
DESCRIPTION
The syslog Lua binding provides access to the syslog(3) functionality.
syslog.openlog(ident, logopt, facility)
The syslog.openlog() function provides for more specialized pro-
cessing of the messages sent by syslog.syslog(). The parameter
ident is a string that will be prepended to every message. The
logopt argument is a bit field specifying logging options, which is
formed by adding one or more of the following values:
syslog.LOG_CONS
If syslog.syslog() cannot pass the message to syslogd(8) it
will attempt to write the message to the console (``/dev/con-
sole'').
syslog.LOG_NDELAY
Open the connection to syslogd(8) immediately. Normally the
open is delayed until the first message is logged. Useful
for programs that need to manage the order in which file
descriptors are allocated.
syslog.LOG_PERROR
Write the message to standard error output as well to the
system log.
syslog.LOG_PID
Log the process id with each message: useful for identifying
instantiations of daemons. (This PID is placed within brack-
ets between the ident and the message.)
The facility parameter encodes a default facility to be assigned to
all messages that do not have an explicit facility encoded:
syslog.LOG_AUTH
The authorization system: login(1), su(1), getty(8), etc.
syslog.LOG_AUTHPRIV
The same as LOG_AUTH, but logged to a file readable only by
selected individuals.
syslog.LOG_CRON
The cron daemon: cron(8).
syslog.LOG_DAEMON
System daemons, such as routed(8), that are not provided for
explicitly by other facilities.
syslog.LOG_FTP
The file transfer protocol daemon: ftpd(8).
syslog.LOG_KERN
Messages generated by the kernel. These cannot be generated
by any user processes.
syslog.LOG_LPR
The line printer spooling system: lpr(1), lpc(8), lpd(8),
etc.
syslog.LOG_MAIL
The mail system.
syslog.LOG_NEWS
The network news system.
syslog.LOG_SYSLOG
Messages generated internally by syslogd(8).
syslog.LOG_USER
Messages generated by random user processes. This is the
default facility identifier if none is specified.
syslog.LOG_UUCP
The uucp system.
syslog.LOG_LOCAL0
Reserved for local use. Similarly for syslog.LOG_LOCAL1
through syslog.LOG_LOCAL7
syslog.syslog(priority, message)
The syslog() function writes message to the system message logger.
The message is then written to the system console, log files,
logged-in users, or forwarded to other machines as appropriate (see
syslogd(8)).
The message is tagged with priority. Priorities are encoded as a
facility and a level. The facility describes the part of the sys-
tem generating the message. The level is selected from the follow-
ing ordered (high to low) list:
syslog.LOG_EMERG
A panic condition. This is normally broadcast to all users.
syslog.LOG_ALERT
A condition that should be corrected immediately, such as a
corrupted system database.
syslog.LOG_CRIT
Critical conditions, e.g., hard device errors.
syslog.LOG_ERR
Errors.
syslog.LOG_WARNING
Warning messages.
syslog.LOG_NOTICE
Conditions that are not error conditions, but should possibly
be handled specially.
syslog.LOG_INFO
Informational messages.
syslog.LOG_DEBUG
Messages that contain information normally of use only when
debugging a program.
syslog.closelog()
The syslog.closelog() function can be used to close the log file.
oldmask = syslog.setlogmask(maskpri)
The setlogmask() function sets the log priority mask to maskpri and
returns the previous mask. Calls to syslog() with a priority not
set in maskpri are rejected.
SEE ALSO
lua(1), luac(1), syslog(3), intro(3lua), syslogd(8)
HISTORY
A syslog Lua binding manual appeared in NetBSD 7.0.
AUTHORS
The syslog Lua binding was written by Marc Balmer <mbalmer@NetBSD.org>.
NetBSD 10.99 January 7, 2014 NetBSD 10.99
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