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| author | Rainer Gerhards <rgerhards@adiscon.com> | 2008-02-24 17:53:16 +0000 |
|---|---|---|
| committer | Rainer Gerhards <rgerhards@adiscon.com> | 2008-02-24 17:53:16 +0000 |
| commit | 965c09147c8f87e4ed6ece46b9d54e612e35cf11 (patch) | |
| tree | fb8a7f782c0d2b07c6413a13aa9cc70b7f3404fa /doc | |
| parent | 79ca6100e64b3fff6f52444f121ee1f7642a7b04 (diff) | |
| download | rsyslog-965c09147c8f87e4ed6ece46b9d54e612e35cf11.tar.gz rsyslog-965c09147c8f87e4ed6ece46b9d54e612e35cf11.tar.xz rsyslog-965c09147c8f87e4ed6ece46b9d54e612e35cf11.zip | |
- added some thoughts on RainerScript
- worked a bit on conversion functions
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/Makefile.am | 1 | ||||
| -rw-r--r-- | doc/expression.html | 8 | ||||
| -rw-r--r-- | doc/rainerscript.html | 37 |
3 files changed, 39 insertions, 7 deletions
diff --git a/doc/Makefile.am b/doc/Makefile.am index f03c9120..31481a96 100644 --- a/doc/Makefile.am +++ b/doc/Makefile.am @@ -37,6 +37,7 @@ html_files = \ queueWorkerLogic.dia \ queueWorkerLogic.jpg \ queueWorkerLogic_small.jpg \ + rainerscript.html \ rsconf1_actionexeconlywhenpreviousissuspended.html \ rsconf1_actionresumeinterval.html \ rsconf1_allowedsender.html \ diff --git a/doc/expression.html b/doc/expression.html index 6d187413..e7eb7842 100644 --- a/doc/expression.html +++ b/doc/expression.html @@ -4,13 +4,7 @@ <body> <h1>Expressions</h1> <p>Rsyslog supports expressions at a growing number of places. So -far, they are supported for filtering messages.</p><p>C-like comments (/* some comment */) are supported <span style="font-weight: bold;">inside</span> the expression, but not yet in the rest of the configuration file.</p> -<p></p> -<h2>Formal Definition</h2> - -<p>Below is the formal definition of expression format (in ABNF, RFC 2234):<br> -</p><pre>; The stuff immediately below here is a quick shot at how the config<br>; file ABNF *at whole* may look like. That is not really related to<br>; expressions, but for the time being I put it here. It will later be<br>; moved to a more appropriate place. -- rgerhards, 2008-02-22<br>?line? := cfsysline / cfli<br>cfsysline:= BOL "$" *char EOL ; how to handle the first line? (no EOL in front!)<br>BOL := ; Begin of Line - implicitely set on file beginning and after each EOL<br>EOL := 0x0a ;LF<br>if_stmt := "if" expr "then"<br>old_filter:= BOL facility "." severity ; no whitespace allowed between BOL and facility!<br>facility := "*" / "auth" / "authpriv" / "cron" / "daemon" / "kern" / "lpr" / <br> "mail" / "mark" / "news" / "security" / "syslog" / "user" / "uucp" / <br> "local0" .. "local7" / "mark"<br> ; The keyword security should not be used anymore<br> ; mark is just internal<br>severity := TBD ; not really relevant in this context<br><br>; and now the actual expression<br>expr := e_and *("or" e_and)<br>e_and := e_cmp *("and" e_cmp)<br>e_cmp := val 0*1(cmp_op val)<br>val := term *(("+" / "-") term)<br>term := factor *(("*" / "/" / "%") factor)<br>factor := ["not"] ["-"] terminal<br>terminal := var / constant / function / ( "(" expr ")" )<br>function := name "(" *("," expr) ")"<br>var := "$" varname<br>varname := msgvar / sysvar<br>msgvar := name<br>sysvar := "$" name<br>name := alpha *(alnum)<br>constant := string / number<br>string := simpstr / tplstr ; tplstr will be implemented in next phase<br>simpstr := "'" *char "'" ; use your imagination for char ;)<br>tplstr := '"' template '"' ; not initially implemented<br>number := ["-"] 1*digit ; 0nn = octal, 0xnn = hex, nn = decimal<br>cmp_op := "==" / "!=" / "<>" / "<" / ">" / "<=" / ">=" / "contains" / "startswith"<br>digit := %x30-39<br>alpha := "a" ... "z" # all letters<br>alnum :* alpha / digit / "_"<br></pre> -<p>[<a href="rsyslog_conf.html">rsyslog.conf overview</a>] +far, they are supported for filtering messages.</p><p>Expression support is provided by RainerScript. For now, please see the formal expression definition in <a href="rainerscript.html">RainerScript ABNF</a>. It is the "expr" node.</p><p>C-like comments (/* some comment */) are supported <span style="font-weight: bold;">inside</span> the expression, but not yet in the rest of the configuration file.</p><p>[<a href="rsyslog_conf.html">rsyslog.conf overview</a>] [<a href="manual.html">manual index</a>] [<a href="http://www.rsyslog.com/">rsyslog site</a>]</p> <p><font size="2">This documentation is part of the <a href="http://www.rsyslog.com/">rsyslog</a> diff --git a/doc/rainerscript.html b/doc/rainerscript.html new file mode 100644 index 00000000..22415258 --- /dev/null +++ b/doc/rainerscript.html @@ -0,0 +1,37 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> +<html><head> +<meta http-equiv="Content-Language" content="en"><title>RainerScript ABNF</title> + +</head> +<body> +<h1>RainerScript ABNF</h1> +<p>This is the formal definition of RainerScript, as supported by +rsyslog configuration. Please note that this currently is working +document and the actual implementation may be quite different.</p> +<p>The +first glimpse of RainerScript will be available as part of rsyslog +3.12.0 expression support. However, the 3.12. series of rsyslog will +have a partial script implementaiton, which will not necessariy be +compatible with the later full implementation. So if you use it, be +prepared for some config file changes as RainerScript evolves.</p> +<p>C-like comments (/* some comment */) are supported in all pure +RainerScript lines. However, legacy-mapped lines do not support them. +All lines support the hash mark "#" as a comment initiator. Everything +between the hash and the end of line is a comment (just like // in C++ +and many other languages).</p> +<h2>Formal Definition</h2> +<p>Below is the formal language definitionin ABNF (RFC 2234) +format: <br> +</p> +<pre>; <span style="font-weight: bold;">all of this is a working document and may change!</span> -- rgerhards, 2008-02-24<br><br>script := *stmt<br>stmt := (if_stmt / block / vardef / run_s / load_s)<br>vardef := "var" ["scope" = ("global" / "event")] <br>block := "begin" stmt "end"<br>load_s := "load" constraint ("module") modpath params ; load mod only if expr is true<br>run_s := "run" constraint ("input") name<br>constraint:= "if" expr ; constrains some one-time commands<br>modpath := expr<br>params := ["params" *1param *("," param) "endparams"]<br>param := paramname) "=" expr<br>paramname := [*(obqualifier ".") name]<br>modpath:= ; path to module<br>?line? := cfsysline / cfli<br>cfsysline:= BOL "$" *char EOL ; how to handle the first line? (no EOL in front!)<br>BOL := ; Begin of Line - implicitely set on file beginning and after each EOL<br>EOL := 0x0a ;LF<br>if_stmt := "if" expr "then"<br>old_filter:= BOL facility "." severity ; no whitespace allowed between BOL and facility!<br>facility := "*" / "auth" / "authpriv" / "cron" / "daemon" / "kern" / "lpr" / <br> "mail" / "mark" / "news" / "security" / "syslog" / "user" / "uucp" / <br> "local0" .. "local7" / "mark"<br> ; The keyword security should not be used anymore<br> ; mark is just internal<br>severity := TBD ; not really relevant in this context<br><br>; and now the actual expression<br>expr := e_and *("or" e_and)<br>e_and := e_cmp *("and" e_cmp)<br>e_cmp := val 0*1(cmp_op val)<br>val := term *(("+" / "-") term)<br>term := factor *(("*" / "/" / "%") factor)<br>factor := ["not"] ["-"] terminal<br>terminal := var / constant / function / ( "(" expr ")" )<br>function := name "(" *("," expr) ")"<br>var := "$" varname<br>varname := msgvar / sysvar<br>msgvar := name<br>sysvar := "$" name<br>name := alpha *(alnum)<br>constant := string / number<br>string := simpstr / tplstr ; tplstr will be implemented in next phase<br>simpstr := "'" *char "'" ; use your imagination for char ;)<br>tplstr := '"' template '"' ; not initially implemented<br>number := ["-"] 1*digit ; 0nn = octal, 0xnn = hex, nn = decimal<br>cmp_op := "==" / "!=" / "<>" / "<" / ">" / "<=" / ">=" / "contains" / "startswith"<br>digit := %x30-39<br>alpha := "a" ... "z" # all letters<br>alnum :* alpha / digit / "_"<br></pre> +<h2>Samples</h2> +<p>Some samples of RainerScript:</p><p>define function IsLinux<br>begin<br> if $environ contains "linux" then return true else return false<br>end</p><p>load if IsLinux() 'imklog.so' params name='klog' endparams /* load klog under linux only */<br>run if IsLinux() input 'klog'<br>load 'ommysql.so'</p><p>if $message contains "error" then<br> action<br> type='ommysql.so', queue.mode='disk', queue.highwatermark = 300,<br> action.dbname='events', action.dbuser='uid',<br> [?action.template='templatename'?] or [?action.sql='insert into table... values('+$facility+','+$severity+...?]<br> endaction<br><br>... or ...</p><p>define action writeMySQL<br> type='ommysql.so', queue.mode='disk', queue.highwatermark = 300,<br> action.dbname='events', action.dbuser='uid',<br> [?action.template='templatename'?] or [?action.sql='insert into table... values('+$facility+','+$severity+...?]<br> endaction</p><p>if $message contains "error" then action writeMySQL</p><p>ALTERNATE APPROACH</p><p>define function IsLinux(<br> if $environ contains "linux" then return true else return false<br>)</p><p>load if IsLinux() 'imklog.so' params name='klog' endparams /* load klog under linux only */<br>run if IsLinux() input 'klog'<br>load 'ommysql.so'</p><p>if $message contains "error" then<br> action(<br> type='ommysql.so', queue.mode='disk', queue.highwatermark = 300,<br> action.dbname='events', action.dbuser='uid',<br> [?action.template='templatename'?] or [?action.sql='insert into table... values('+$facility+','+$severity+...?]<br> )<br><br>... or ...</p><p>define action writeMySQL(<br> type='ommysql.so', queue.mode='disk', queue.highwatermark = 300,<br> action.dbname='events', action.dbuser='uid',<br> [?action.template='templatename'?] or [?action.sql='insert into table... values('+$facility+','+$severity+...?]<br> )</p><p>if $message contains "error" then action writeMySQL(action.dbname='differentDB')</p><p></p><p>[<a href="rsyslog_conf.html">rsyslog.conf overview</a>] +[<a href="manual.html">manual index</a>] [<a href="http://www.rsyslog.com/">rsyslog site</a>]</p> +<p><font size="2">This documentation is part of the +<a href="http://www.rsyslog.com/">rsyslog</a> +project.<br> +Copyright © 2008 by <a href="http://www.gerhards.net/rainer">Rainer +Gerhards</a> and +<a href="http://www.adiscon.com/">Adiscon</a>. +Released under the GNU GPL version 3 or higher.</font></p> +</body></html>
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