Added bool_lax{} expansion operator, which uses Router condition logic to

[exim.git] / doc / doc-docbook / spec.xfpt

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 7237cc3dfd6b53414bf6f8df0ac1c6b87d549c14..8254bee5163c7fbd9f59c9c0baf7dedffd581d02 100644 (file)
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -1,4 +1,4 @@
-. $Cambridge: exim/doc/doc-docbook/spec.xfpt,v 1.81 2010/06/06 01:35:41 pdp Exp $
+. $Cambridge: exim/doc/doc-docbook/spec.xfpt,v 1.84 2010/06/07 08:23:20 pdp Exp $
 .
 . /////////////////////////////////////////////////////////////////////////////
 . This is the primary source of the Exim Manual. It is an xfpt document that is
@@ -2604,6 +2604,11 @@ This option causes Exim to output a few sentences stating what it is.
 The same output is generated if the Exim binary is called with no options and
 no arguments.
 
+.vitem &%--version%&
+.oindex "&%--version%&"
+This option is an alias for &%-bV%& and causes version information to be
+displayed.
+
 .vitem &%-B%&<&'type'&>
 .oindex "&%-B%&"
 .cindex "8-bit characters"
@@ -9807,6 +9812,17 @@ For example:
 ${if bool{$acl_m_privileged_sender} ...
 .endd
 
+.vitem &*bool_lax&~{*&<&'string'&>&*}*&
+.cindex "expansion" "boolean parsing"
+.cindex "&%bool_lax%& expansion condition"
+Like &%bool%&, this condition turns a string into a boolean state.  But
+where &%bool%& accepts a strict set of strings, &%bool_lax%& uses the same
+loose definition that the Router &%condition%& option uses.  The empty string
+and the values &"false"&, &"no"& and &"0"& map to false, all others map to
+true.
+
+Note that where &"bool{00}"& is false, &"bool_lax{00}"& is true.
+
 .vitem &*crypteq&~{*&<&'string1'&>&*}{*&<&'string2'&>&*}*&
 .cindex "expansion" "encrypted comparison"
 .cindex "encrypted strings, comparing"
@@ -15664,6 +15680,9 @@ router is skipped, and the address is offered to the next one.
 If the result is any other value, the router is run (as this is the last
 precondition to be evaluated, all the other preconditions must be true).
 
+This option is unique in that multiple &%condition%& options may be present.
+All &%condition%& options must succeed.
+
 The &%condition%& option provides a means of applying custom conditions to the
 running of routers. Note that in the case of a simple conditional expansion,
 the default expansion values are exactly what is wanted. For example:
@@ -15674,6 +15693,12 @@ Because of the default behaviour of the string expansion, this is equivalent to
 .code
 condition = ${if >{$message_age}{600}{true}{}}
 .endd
+A multiple condition example, which succeeds:
+.code
+condition = ${if >{$message_age}{600}}
+condition = ${if !eq{${lc:$local_part}}{postmaster}}
+condition = foobar
+.endd
 If the expansion fails (other than forced failure) delivery is deferred. Some
 of the other precondition options are common special cases that could in fact
 be specified using &%condition%&.