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diff --git a/proto/regexp_table b/proto/regexp_table new file mode 100644 index 0000000..1c38472 --- /dev/null +++ b/proto/regexp_table @@ -0,0 +1,209 @@ +#++ +# NAME +# regexp_table 5 +# SUMMARY +# format of Postfix regular expression tables +# SYNOPSIS +# \fBpostmap -q "\fIstring\fB" regexp:/etc/postfix/\fIfilename\fR +# +# \fBpostmap -q - regexp:/etc/postfix/\fIfilename\fB <\fIinputfile\fR +# DESCRIPTION +# The Postfix mail system uses optional tables for address +# rewriting, mail routing, or access control. These tables +# are usually in \fBdbm\fR or \fBdb\fR format. +# +# Alternatively, lookup tables can be specified in POSIX regular +# expression form. In this case, each input is compared against a +# list of patterns. When a match is found, the corresponding +# result is returned and the search is terminated. +# +# To find out what types of lookup tables your Postfix system +# supports use the "\fBpostconf -m\fR" command. +# +# To test lookup tables, use the "\fBpostmap -q\fR" command +# as described in the SYNOPSIS above. Use "\fBpostmap -hmq +# -\fR <\fIfile\fR" for header_checks(5) patterns, and +# "\fBpostmap -bmq -\fR <\fIfile\fR" for body_checks(5) +# (Postfix 2.6 and later). +# COMPATIBILITY +# .ad +# .fi +# With Postfix version 2.2 and earlier specify "\fBpostmap +# -fq\fR" to query a table that contains case sensitive +# patterns. Patterns are case insensitive by default. +# TABLE FORMAT +# .ad +# .fi +# The general form of a Postfix regular expression table is: +# .IP "\fB/\fIpattern\fB/\fIflags result\fR" +# When \fIpattern\fR matches the input string, +# use the corresponding \fIresult\fR value. +# .IP "\fB!/\fIpattern\fB/\fIflags result\fR" +# When \fIpattern\fR does \fBnot\fR match the input string, +# use the corresponding \fIresult\fR value. +# .IP "\fBif /\fIpattern\fB/\fIflags\fR" +# .IP "\fBendif\fR" +# If the input string matches /\fIpattern\fR/, then match that +# input string against the patterns between \fBif\fR and +# \fBendif\fR. The \fBif\fR..\fBendif\fR can nest. +# .sp +# Note: do not prepend whitespace to patterns inside +# \fBif\fR..\fBendif\fR. +# .sp +# This feature is available in Postfix 2.1 and later. +# .IP "\fBif !/\fIpattern\fB/\fIflags\fR" +# .IP "\fBendif\fR" +# If the input string does not match /\fIpattern\fR/, then +# match that input string against the patterns between \fBif\fR +# and \fBendif\fR. The \fBif\fR..\fBendif\fR can nest. +# .sp +# Note: do not prepend whitespace to patterns inside +# \fBif\fR..\fBendif\fR. +# .sp +# This feature is available in Postfix 2.1 and later. +# .IP "blank lines and comments" +# Empty lines and whitespace-only lines are ignored, as +# are lines whose first non-whitespace character is a `#'. +# .IP "multi-line text" +# A logical line starts with non-whitespace text. A line that +# starts with whitespace continues a logical line. +# .PP +# Each pattern is a POSIX regular expression enclosed by a pair of +# delimiters. The regular expression syntax is documented in +# \fBre_format\fR(7) with 4.4BSD, in \fBregex\fR(5) with Solaris, and in +# \fBregex\fR(7) with Linux. Other systems may use other document names. +# +# The expression delimiter can be any non-alphanumerical +# character, except whitespace +# or characters that have special meaning (traditionally the forward +# slash is used). The regular expression can contain whitespace. +# +# By default, matching is case-insensitive, and newlines are not +# treated as special characters. The behavior is controlled by flags, +# which are toggled by appending one or more of the following +# characters after the pattern: +# .IP "\fBi\fR (default: on)" +# Toggles the case sensitivity flag. By default, matching is case +# insensitive. +# .IP "\fBm\fR (default: off)" +# Toggle the multi-line mode flag. When this flag is on, the \fB^\fR +# and \fB$\fR metacharacters match immediately after and immediately +# before a newline character, respectively, in addition to +# matching at the start and end of the input string. +# .IP "\fBx\fR (default: on)" +# Toggles the extended expression syntax flag. By default, support +# for extended expression syntax is enabled. +# TABLE SEARCH ORDER +# .ad +# .fi +# Patterns are applied in the order as specified in the table, until a +# pattern is found that matches the input string. +# +# Each pattern is applied to the entire input string. +# Depending on the application, that string is an entire client +# hostname, an entire client IP address, or an entire mail address. +# Thus, no parent domain or parent network search is done, and +# \fIuser@domain\fR mail addresses are not broken up into their +# \fIuser\fR and \fIdomain\fR constituent parts, nor is \fIuser+foo\fR +# broken up into \fIuser\fR and \fIfoo\fR. +# TEXT SUBSTITUTION +# .ad +# .fi +# Substitution of substrings (text that matches patterns +# inside "()") from the matched expression into the result +# string is requested with $1, $2, etc.; specify $$ to produce +# a $ character as output. +# The macros in the result string may need to be written as +# ${n} or $(n) if they aren't followed by whitespace. +# +# Note: since negated patterns (those preceded by \fB!\fR) return a +# result when the expression does not match, substitutions are not +# available for negated patterns. +# INLINE SPECIFICATION +# .ad +# .fi +# The contents of a table may be specified in the table name +# (Postfix 3.7 and later). +# The basic syntax is: +# +# .nf +# main.cf: +# \fIparameter\fR \fB= .. regexp:{ { \fIrule-1\fB }, { \fIrule-2\fB } .. } ..\fR +# +# master.cf: +# \fB.. -o { \fIparameter\fR \fB= .. regexp:{ { \fIrule-1\fB }, { \fIrule-2\fB } .. } .. } ..\fR +# .fi +# +# Postfix ignores whitespace after '{' and before '}', and +# writes each \fIrule\fR as one text line to an in-memory +# file: +# +# .nf +# in-memory file: +# rule-1 +# rule-2 +# .. +# .fi +# +# Postfix parses the result as if it is a file in /etc/postfix. +# +# Note: if a rule contains \fB$\fR, specify \fB$$\fR to keep +# Postfix from trying to do \fI$name\fR expansion as it +# evaluates a parameter value. +# EXAMPLE SMTPD ACCESS MAP +# # Disallow sender-specified routing. This is a must if you relay mail +# # for other domains. +# /[%!@].*[%!@]/ 550 Sender-specified routing rejected +# +# # Postmaster is OK, that way they can talk to us about how to fix +# # their problem. +# /^postmaster@/ OK +# +# # Protect your outgoing majordomo exploders +# if !/^owner-/ +# /^(.*)-outgoing@(.*)$/ 550 Use ${1}@${2} instead +# endif +# EXAMPLE HEADER FILTER MAP +# # These were once common in junk mail. +# /^Subject: make money fast/ REJECT +# /^To: friend@public\\.com/ REJECT +# EXAMPLE BODY FILTER MAP +# # First skip over base 64 encoded text to save CPU cycles. +# ~^[[:alnum:]+/]{60,}$~ OK +# +# # Put your own body patterns here. +# SEE ALSO +# postmap(1), Postfix lookup table manager +# pcre_table(5), format of PCRE tables +# cidr_table(5), format of CIDR tables +# README FILES +# .ad +# .fi +# Use "\fBpostconf readme_directory\fR" or +# "\fBpostconf html_directory\fR" to locate this information. +# .na +# .nf +# DATABASE_README, Postfix lookup table overview +# AUTHOR(S) +# The regexp table lookup code was originally written by: +# LaMont Jones +# lamont@hp.com +# +# That code was based on the PCRE dictionary contributed by: +# Andrew McNamara +# andrewm@connect.com.au +# connect.com.au Pty. Ltd. +# Level 3, 213 Miller St +# North Sydney, NSW, Australia +# +# Adopted and adapted by: +# Wietse Venema +# IBM T.J. Watson Research +# P.O. Box 704 +# Yorktown Heights, NY 10598, USA +# +# Wietse Venema +# Google, Inc. +# 111 8th Avenue +# New York, NY 10011, USA +#-- |