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#!/usr/bin/perl
## ----------------------------------------------------------------------
## Debian GNU/Linux update-catalog version 0.2
## ----------------------------------------------------------------------
## Copyright (c) 2001-2004 Ardo van Rangelrooij
## Copyright (c) 2012 Helmut Grohne
## Copyright (c) 2012 Jakub Wilk
##
## This is free software; see the GNU General Public Licence version 2
## or later for copying conditions. There is NO warranty.
## ----------------------------------------------------------------------
## ----------------------------------------------------------------------
use strict;
## ----------------------------------------------------------------------
$0 =~ m|[^/]+$|;
## ----------------------------------------------------------------------
use vars qw( $name );
$name = $&;
## ----------------------------------------------------------------------
use vars qw( $add );
use vars qw( $backup );
use vars qw( $catalog );
use vars qw( @data );
use vars qw( $debug );
use vars qw( $entry );
use vars qw( $quiet );
use vars qw( $remove );
use vars qw( $super );
use vars qw( $updatesuper );
use vars qw( $template );
use vars qw( $type );
## ----------------------------------------------------------------------
while ( $ARGV[0] =~ m/^--/ )
{
$_ = shift( @ARGV );
last if $_ eq '--';
if ( $_ eq '--add' )
{
$add = 1;
}
elsif ( $_ eq '--remove' )
{
$remove = 1;
}
elsif ( $_ eq '--quiet' )
{
$quiet = 1;
}
elsif ( $_ eq '--super' )
{
$super = 1;
}
elsif ( $_ eq '--test' )
{
$debug = 1;
}
elsif ( $_ eq '--update-super' )
{
$updatesuper = 1;
}
elsif ( $_ eq '--help' )
{
&help;
exit -1;
}
elsif ( $_ eq '--version' )
{
&help;
exit -1;
}
else
{
print STDERR "$name: unknown option \`$_'\n";
&help;
exit 1;
}
}
## ----------------------------------------------------------------------
if ( $add + $remove + $updatesuper != 1)
{
print "Huh? You have to use precisely one out of --add --remove or --update-super.\n";
exit 1;
}
## ----------------------------------------------------------------------
if ( $add || $remove )
{
if ( ! @ARGV )
{
print STDERR "\n";
&help;
exit 1;
}
if ( $super )
{
$catalog = '/etc/sgml/catalog';
}
else
{
$catalog = shift( @ARGV );
}
if ( ! @ARGV )
{
print STDERR "\n";
&help;
exit 1;
}
$entry = shift( @ARGV );
}
## ----------------------------------------------------------------------
if ( @ARGV )
{
print STDERR "$name: too many arguments\n";
&help;
exit 1;
}
## ----------------------------------------------------------------------
print STDERR "$name: test mode - catalog file will not be updated\n"
if $debug && ! $quiet;
## ----------------------------------------------------------------------
if ( $super )
{
print "update-catalog: Suppressing action on super catalog. Invoking trigger instead.\n";
system("dpkg-trigger /etc/sgml");
if ( $? != 0 )
{
print "Invocation of dpkg-trigger failed with status $?.\n";
print "Forcing update of the super catalog...\n";
&update_super;
}
}
elsif ( $add )
{
print "Adding entry $entry to catalog $catalog...\n"
unless $quiet;
&read_catalog_without_entry;
&add_entry;
&write_catalog;
}
elsif ( $remove )
{
print "Removing entry $entry from catalog $catalog...\n"
unless $quiet;
&read_catalog_without_entry;
&write_catalog;
}
elsif ( $updatesuper )
{
print "Updating the super catalog...\n"
unless $quiet;
&update_super;
}
## ----------------------------------------------------------------------
exit 0;
## ----------------------------------------------------------------------
sub read_catalog_without_entry
{
if ( -f $catalog )
{
print "Reading catalog $catalog and removing entry $entry...\n"
if $debug;
open( CATALOG, "<$catalog" )
or die "cannot open catalog $catalog for reading: $!";
while ( <CATALOG> )
{
chop;
push( @data, $_ ) unless m/$entry/;
}
close( CATALOG );
}
else
{
$type = $super ? 'super' : 'centralized';
$template = "/usr/share/sgml-base/catalog.$type";
print "Reading template $template...\n"
if $debug;
open( TEMPLATE, "<$template" )
or die "cannot open template $template for reading: $!";
while ( <TEMPLATE> )
{
chop;
s|CATALOG|$catalog| if m/CATALOG/;
push( @data, $_ );
}
close( TEMPLATE );
}
}
## ----------------------------------------------------------------------
sub add_entry
{
print "Appending entry $entry...\n" if $debug;
push( @data, "CATALOG $entry" );
}
## ----------------------------------------------------------------------
sub write_catalog
{
$backup = $catalog . '.old';
if ( not $debug )
{
if ( -f $catalog )
{
# remove old backup file
if ( -f $backup )
{
unlink( $backup )
or die "cannot remove backup copy $backup: $!";
}
rename( $catalog, $backup )
or die "cannot rename $catalog to $backup: $!";
}
open( CATALOG, ">$catalog" )
or die "cannot open catalog $catalog for writing: $!";
for ( @data ) { print CATALOG "$_\n"; };
close( CATALOG );
}
else
{
print "Writing new entry to $catalog...\n";
for ( @data ) { print "$_\n"; };
}
}
## ----------------------------------------------------------------------
# Reference: https://www.oasis-open.org/specs/a401.htm
sub check_catalog($)
{
my($catalog)=shift;
my $base = $catalog;
$base =~ s,/[^/]+$,,;
my $catalog_tokens = qr{
( (?: \s+ | -- .*? --)+ # whitespace and comments
| ' .*? ' | " .*? " # literal
| \S+ # other tokens
)
}sx;
unless(open(PKGCAT, "<", $catalog)) {
print "Warning: Ignoring unreadable catalog file `$catalog'.\n"
unless $quiet;
return 0;
};
local $/;
my $contents = <PKGCAT>;
close PKGCAT;
my $prevtoken = 0;
while ($contents =~ m/$catalog_tokens/g) {
my $token = $1;
if ($prevtoken) {
next if $token =~ m/^\s|^--/;
$token =~ s/^(['"])(.*)\1$/$2/;
if($prevtoken eq 'base') {
$base = $token;
} elsif($prevtoken eq 'catalog') {
my $path;
if($token =~ m,^/,) {
$path = $token;
} else {
$path = "$base/$token";
}
if(not -f $path) {
print "Warning ignoring catalog `$catalog' which references non-existent catalogs. See man update-catalog for details.\n"
unless $quiet;
return 0;
}
}
$prevtoken = 0;
} elsif ("\L$token" eq 'catalog') {
$prevtoken = 'catalog';
} elsif ("\L$token" eq 'base') {
$prevtoken = 'base';
}
}
return 1;
}
## ----------------------------------------------------------------------
sub update_super
{
my(@cats);
my($catdir)="/etc/sgml";
my($supercat)="/var/lib/sgml-base/supercatalog";
my $catfile;
opendir(CATDIR, $catdir)
or die "cannot open catalog directory $catdir: $!";
while( readdir CATDIR )
{
m/^[^.].*\.cat$/ or next;
$catfile = $catdir . "/" . $_;
check_catalog($catfile) or next;
push(@cats, $catfile);
}
closedir(CATDIR)
or die "cannot close catalog directory $catdir: $!";
if ( not $debug )
{
open( CATALOG, ">$supercat.new")
or die "cannot open $supercat.new for writing: $!";
print CATALOG "--\n";
print CATALOG "## This file is created by update-catalog with update-super.\n";
print CATALOG "## Please see update-catalog(8) for how to modify this file.\n";
print CATALOG "--\n";
for ( @cats ) { print CATALOG "CATALOG $_\n"; }
close( CATALOG );
if( -e $supercat)
{
rename( $supercat, "$supercat.old" )
or die "cannot rename $supercat to $supercat.old: $!";
}
rename( "$supercat.new", $supercat )
or die "cannot rename $supercat.new to $supercat: $!";
}
else
{
print "The new super catalog would contain the following entries.\n";
for ( @cats ) { print "CATALOG $_\n"; }
}
}
## ----------------------------------------------------------------------
sub help
{
print STDERR <<END;
Usage:
$name <options> --add --super <centralized_catalog>
$name <options> --add <centralized_catalog> <ordinary_catalog>
or
$name <options> --remove --super <centralized_catalog>
$name <options> --remove <centralized_catalog> <ordinary_catalog>
Options:
--quiet be quiet
--test do not modify any files, enables debugging mode
--version display version number
--help display this text
END
}
## ----------------------------------------------------------------------
sub version
{
print "Debian $name version 0.2\n";
}
## ----------------------------------------------------------------------
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