Name
syslog
Synopsis
The syslog
database-map type allows you to log
messages directly from inside rule sets. If you are unfamiliar with
syslog, see Section 14.3 for a
general discussion of syslog-style logging.
The syslog
type is declared like this:
Kname syslog switches
The name is the database-map name you will use in rule sets. The switches are selected from those shown in Table 23-25.
Switch |
§ |
Description |
|
Don’t use this database map if DeliveryMode=defer | |
|
The logging level at which to log | |
|
Space replacement character |
In rule sets, the syslog
type is used, for
example, like this:
R $* $: $(name what to log $)
The information in the position of the key
is
logged as is via the syslog facility. An empty
workspace is returned as a result of logging. That is, for the
syslog
type, the $(
and
$)
expressions evaluate to an empty string.
Any use of defined macros in the message should use the
$&
prefix so that the current value is logged.
For example, the following might be used to log the load average:
Kdolog syslog R $* $: $(dolog The cutoff was caused by a load average of $&{load_average}. $)
If you need to have a sendmail macro or
positional macro literally logged as is, just prefix it with an extra
$
character. For example, the following shows the
macro and logs its value:
R $* $: $(dolog Failure detected with $$1=$1 $)
Don’t use quotation marks to surround macro references. Quotation ...
Get Sendmail, 3rd Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.