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6. syslog message format
6.2. header
6.2.1. pri
pri=
6.2.2. version
6.2.3. timestamp
example 1
1985-04-12t23:20:50.52z
example 2
1985-04-12t19:20:50.52-04:00
example 3
2003-10-11t22:14:15.003z
example 4
2003-08-24t05:14:15.000003-07:00
6.2.4. hostname
6.2.6. procid
6.2.7. msgid
6.3. structured-data
6.3.1. sd-element
6.3.2. sd-id
6.3.3. sd-param
6.3.4. change control
6.3.5. examples
example 1 - valid
this example is a structured data element with a non-iana controlled
sd-id of type "examplesdid@32473", which has three parameters.
example 2 - valid
this is the same example as in 1, but with a second structured data
element. please note that the structured data element immediately
follows the first one (there is no sp between them).
example 3 - invalid
error : 兩個sd之間，多乙個空格sp character
example 4 - invalid
error : 第乙個sd內部，多乙個空格
sp character
example 5 - valid
[sigsig ver="1" rsid="1234" ... signature="..."]
example 5 is a valid example. it shows a hypothetical iana-assigned
sd-id. the ellipses denote missing content, which has been left out
of this example for brevity.
6.4. msg
6.5. examples
example 1 - with no structured-data
<34>1 2003-10-11t22:14:15.003z mymachine.example.com su - id47 - bom'su root' failed for lonvick on /dev/pts/8
#header的8個部分用空格sp,分割，<34>1除外，因為不需要sp就可以分割，
#header與structured-data，msg也是用sp分割。
facility : 4
severity : 2
version : 1
timestamp : 2003-10-11t22:14:15.003z
hostname : mymachine.example.com
procid : unknown indicated by "-" in the structured-data field
msgid : id47
structured-data : no this is indicated by "-" in the structured-data field
bom 是控制字元，以後再搞。
msg : 'su root' failed for lonvick on /dev/pts/8
最後的是msg，可以包含任意空格
example 2 - with no structured-data
<165>1 2003-08-24t05:14:15.000003-07:00 192.0.2.1 myproc 8710 - - %% it's time to make the do-nuts.
example 3 - with structured-data
<165>1 2003-10-11t22:14:15.003z mymachine.example.com
evntslog - id47 [examplesdid@32473 iut="3" eventsource=
event log entry...
example 4 - structured-data only, (no msg)
<165>1 2003-10-11t22:14:15.003z mymachine.example.com
evntslog - id47 [examplesdid@32473 iut="3" eventsource=
class="high"]
this example shows a message with only structured-data and no msg
part. this is a valid message.
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