sendmail 8.13 Companion

Useful Tables

There are three useful tables in this chapter:

• Table 18-2 lists all the rule operators that you may use on the LHS of rule sets (Section 18.2.1 ^[V8.13])

• Table 18-3 lists all the rule operators that you may use on the RHS of rule sets (Section 18.2.2 ^[V8.13])

• Table 18-4 lists all the rule operators (Section 18.2.3 ^[V8.13])

Table of LHS Operators

The LHS (lefthand side) of any rule is compared to the current contents of the workspace to determine whether the two match. Table 18-2 displays a variety of special operators offered by sendmail that make comparisons easier and more versatile.

Table 18-2. LHS operators

Operator	sendmail text reference	Description or use
$*	18.9.21[3ed]	Match zero or more tokens
$+	18.9.17[3ed]	Match one or more tokens
$-	18.9.16[3ed]	Match exactly one token
$@	18.9.2[3ed]	Match exactly zero tokens (V8 only)
$=	22.2.1[3ed]	Match any tokens in a class[a]
$~	22.2.2[3ed]	Match any single token not in a class
$#	18.9.18[3ed]	Match a literal $#
$|	18.9.23[3ed]	Match a literal $|
$&	21.5.3[3ed]	Delay macro expansion until runtime
[a] Class matches either a single token or multiple tokens, depending on the version of sendmail (§22.2[3ed]).

Table of RHS Operators

The RHS (right-hand side) of a rule rewrites the workspace. To make this rewriting more versatile, sendmail offers several special RHS operators. The complete list is shown in Table 18-3.

Table 18-3. RHS operators

RHS	sendmail text reference ...