Nortel Networks 4050 Manuale Utente
388 Chapter 9 Customizing the portal and user logon
320818-A
lists the regular expressions and escape sequences you can use in an
Exclude List entry. The set of allowable regular expressions is a subset of the set
found in egrep and in the AWK programming language. The escape sequences are
allowed in Erlang strings.
found in egrep and in the AWK programming language. The escape sequences are
allowed in Erlang strings.
Table 75
Allowed regular expressions and escape sequences
String
Usage
Expressions
c
Matches the non-metacharacter c.
\c
Matches the literal character c (see escape sequence).
.
Matches any character.
^
Matches the beginning of a string.
$
Matches the end of a string.
[abc...]
Character class, which matches any of the characters abc....
Character ranges are specified by a pair of characters separated by a
hyphen (-).
hyphen (-).
[^abc...]
Negated character class, which matches any character except abc....
r1|r2
Alternation — matches either r1 or r2.
r1r2
Concatenation — matches r1 and then r2.
r+
Matches one or more r’s.
r*
Matches zero or more r’s.
r?
Matches zero or one r’s.
(r)
Grouping — matches r.
Escape sequences
\b
backspace
\f form
feed
\n newline
(line
feed)
\r carriage
return
\t
tab
\e escape
\v
vertical tab
\s
space
\d
delete