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| author | David Hankins <dhankins@isc.org> | 2007-06-07 15:52:30 +0000 |
|---|---|---|
| committer | David Hankins <dhankins@isc.org> | 2007-06-07 15:52:30 +0000 |
| commit | dd3282251eb1d2ea411d09f0ccdb079a891aa4ce (patch) | |
| tree | c5f07e7d3b56b32a6a74c6c380f0325ab79fdf67 /common/dhcp-eval.5 | |
| parent | a546f2a714b15049860d0cb60a6e8e2ea8ee7418 (diff) | |
| download | isc-dhcp-dd3282251eb1d2ea411d09f0ccdb079a891aa4ce.tar.gz | |
- Two new operators, ~= and ~~, have been integrated to implement
boolean matches by regular expression (such as may be used in
class matching statements). Thanks to a patch by Alexandr S.
Agranovsky, which underwent slight modification. [ISC-Bugs #8155]
Diffstat (limited to 'common/dhcp-eval.5')
| -rw-r--r-- | common/dhcp-eval.5 | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/common/dhcp-eval.5 b/common/dhcp-eval.5 index 0647d27d..1bde0b2b 100644 --- a/common/dhcp-eval.5 +++ b/common/dhcp-eval.5 @@ -1,4 +1,4 @@ -.\" $Id: dhcp-eval.5,v 1.26 2007/05/19 19:16:24 dhankins Exp $ +.\" $Id: dhcp-eval.5,v 1.27 2007/06/07 15:52:29 dhankins Exp $ .\" .\" Copyright (c) 2004,2007 by Internet Systems Consortium, Inc. ("ISC") .\" Copyright (c) 1996-2003 by Internet Software Consortium @@ -114,7 +114,7 @@ treated as false in conditionals. The following is the current list of boolean expressions that are supported by the DHCP distribution. .PP -.I data-expression-1 \fB=\fI data-expression-2\fR +.I data-expression-1 \fB=\fR \fIdata-expression-2\fR .RS 0.25i .PP The \fB=\fR operator compares the values of two data expressions, @@ -123,7 +123,20 @@ either the left-hand side or the right-hand side are null, the result is also null. .RE .PP -.I boolean-expression-1 \fBand\fI boolean-expression-2\fR +.I data-expression-1 \fB~=\fR \fIdata-expression-2\fR +.I data-expression-1 \fB~~\fR \fIdata-expression-2\fR +.RS 0.25i +.PP +The \fB~=\fR and \fB~~\fR operators (not available on all systems) perform +extended regex(7) matching of the values of two data expressions, returning +true if \fIdata-expression-1\fR matches against the regular expression +evaluated by \fIdata-expression-2\fR, or false if it does not match or +encounters some error. If either the left-hand side or the right-hand side +are null, the result is also false. The \fB~~\fR operator differs from the +\fB~=\fR operator in that it is case-insensitive. +.RE +.PP +.I boolean-expression-1 \fBand\fR \fIboolean-expression-2\fR .PP .RS 0.25i The \fBand\fR operator evaluates to true if the boolean expression on @@ -133,7 +146,7 @@ the expression on the left-hand side or the expression on the right-hand side are null, the result is null. .RE .PP -.I boolean-expression-1 \fBor\fI boolean-expression-2\fR +.I boolean-expression-1 \fBor\fR \fIboolean-expression-2\fR .PP .RS 0.25i The \fBor\fR operator evaluates to true if either the boolean |