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#!/usr/bin/perl
# postconf2man - convert postconf2html to nroff
# Basic operation:
#
# - Process input as blocks of text separated by one or more empty
# (or all whitespace) lines.
#
# - Process <nroffescape> pass-through requests for things that this
# script cannot do automatically.
#
# Caution: this depends heavily on the postconf2html output format.
#use Getopt::Std;
#$opt_h = undef;
#$opt_v = undef;
#getopts("hv");
#die "Usage: $0 [-hv]\n" if ($opt_h);
#push @ARGV, "/dev/null"; # XXX
while(<>) {
# Skip blank lines before text block.
next unless (/\S/);
# Gobble up the next text block.
$block = "";
do {
$_ =~ s/\s+\n$/\n/;
$block .= $_;
} while(($_ = <>) && /\S/);
# How the %!#$^@ do I get a backslash substituted into a string?
# Even \134 comes out as \e. What brain damage is this?
#$block =~ s/\n\./\n\\\&./g;
$block =~ s/\n\./\n\134\&./g;
if ($block =~ /<H2>/) {
$block =~ s/<H2><a[^>]+>([^<]+)<\/a><\/H2>/\n.SH \1\n/g;
$block =~ tr/a-z/A-Z/;
}
$block =~ s/<DT><b><a[^>]+>([^<]+)<\/a>\n(.*)<\/b><\/DT><DD>/\n.SH \1 \2\n/g;
$block =~ s/<[Aa][ \n]+[Hh][Rr][Ee][Ff]="[^"]+">//g;
$block =~ s/<[Aa][ \n]+[Nn][Aa][Mm][Ee]="[^"]+">//g;
$block =~ s/<\/[Aa]>//g;
$block =~ s/<\/DD>/\n/g;
$block =~ s/<DL>/\n/g;
$block =~ s/<\/DL>/\n/g;
$block =~ s/\\/\\e/g;
$block =~ s/<b>/\\fB/g;
$block =~ s/<i>/\\fI/g;
$block =~ s/<\/b>/\\fR/g;
$block =~ s/<\/i>/\\fR/g;
$block =~ s/^(<p(re)?>)/.PP\n\1/ if ($wantpp);
$block =~ s/<p> */\n/g;
$block =~ s/ *<\/p>/\n/g;
$block =~ s/<pre>/\n.nf\n.na\n.ft C\n/g;
$block =~ s/<\/pre>/\n.fi\n.ad\n.ft R\n/g;
$block =~ s/<dl[^>]*>/\n/g;
$block =~ s/<ul>/\n/g;
#$block =~ s/<\/dl>/\n.PP\n/g;
#$block =~ s/<\/ul>/\n.PP\n/g;
$block =~ s/<\/dl>/\n.br\n/g;
$block =~ s/<\/ul>/\n.br\n/g;
$block =~ s/<dd>\s*/\n/g;
$block =~ s/<\/dd>/\n.br\n/g;
$block =~ s/<li>\s*/\n.IP \\(bu\n/g;
$block =~ s/<dt>\s*/\n.IP "/g;
$block =~ s/\s*<\/dt>/"/g;
$block =~ s/<tt>\s*//g;
$block =~ s/\s*<\/tt>//g;
# Munge "-" here, so that we don't screw up ".in -4".
$block =~ s/-/\\-/g;
$block =~ s/<blockquote>/\n.sp\n.in +4\n/g;
$block =~ s/<\/blockquote>/\n.in -4\n/g;
$block =~ s/\n<br>\s*/\n.br\n/g;
$block =~ s/<br>\s*/\n.br\n/g;
$block =~ s/≤/<=/g;
$block =~ s/</</g;
$block =~ s/≥/>=/g;
$block =~ s/>/>/g;
$block =~ s/&/\&/g;
$block =~ s/–/-/g;
$block =~ s/—/-/g;
$block =~ s/\s+\n/\n/g;
$block =~ s/^\n//g;
$block =~ s/\s*<\s*nroffescape\s+([^ >]+)\s*>\s*/\n\1\n/g;
$block =~ s/([a-z][_a-zA-Z0-9-]*)(\([0-9]\))/\\fB\1\\fR\2/g;
print $block;
$wantpp = !($block =~ /^\.(SH|IP)/);
}
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