From: Ted Lemon <source@isc.org>
Date: Sat, 31 Jul 1999 21:37:12 +0000 (+0000)
Subject: Document changes to concat.
X-Git-Tag: V3-BETA-1-PATCH-2~5^2~146
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6499fe2748078e013999be2fa46e58ca1e75289b;p=thirdparty%2Fdhcp.git

Document changes to concat.
---

diff --git a/common/dhcp-eval.5 b/common/dhcp-eval.5
index 6c0b28e1c..89fd9b332 100644
--- a/common/dhcp-eval.5
+++ b/common/dhcp-eval.5
@@ -240,13 +240,12 @@ A list of hexadecimal octet values, seperated by colons, may be
 specified as a data expression.
 .RE
 .PP
-.B concat (\fIdata-expr1\fB, \fIdata-expr2\fB)\fR
+.B concat (\fIdata-expr1\fB, ..., \fIdata-exprN\fB)\fR
 .RS 0.25i
-The two expressions are evaluated, and the result of concatenating the
-results of the two evaluations is returned.   If either subexpression
-evaluates to null, then the result is the value of the other
-expression.   If both expressions evaluate to null, then the result is
-null.
+The expressions are evaluated, and the results of each evaluation are
+concatenated in the sequence that the subexpressions are listed.   Any
+subexpression that evaluates to null is treated as a zero-length string.
+If all the arguments to concat are null, the result is also null.
 .RE
 .PP
 .B reverse (\fInumeric-expr1\fB, \fIdata-expr2\fB)\fR