--- /dev/null
+#! /usr/bin/perl
+use strict;
+use warnings;
+no warnings qw(once);
+use DBI;
+use AppConfig;
+use lib qw(. /etc/itkacl);
+require 'config.pm';
+
+my $conf = AppConfig->new();
+$conf->define('force!');
+$conf->getopt(\@ARGV);
+
+exit 0 if (!should_run());
+
+my $dbh = DBI->connect("dbi:Pg:" .
+ "dbname=" . $itkaclsyncconfig::db_name . ";" .
+ "host= " . $itkaclsyncconfig::db_host,
+ $itkaclsyncconfig::db_user,
+ $itkaclsyncconfig::db_pass)
+or die "Couldn't connect to database: " . DBI::errstr();
+$dbh->{RaiseError} = 1;
+
+# Fetch members of all groups.
+my %members = ();
+while (my ($name,$passwd,$gid,$members) = getgrent()) {
+ push @{$members{$name}}, ( split /\s+/, $members );
+}
+
+my %access = ();
+while (my ($name,$passwd,$uid,$gid,$quota,$comment,$gcos,$dir,$shell,$expire) = getpwent()) {
+ # No system users, except those that are explicitly included
+ next if ($uid < $itkaclsyncconfig::minimum_uid && (grep { $name eq $_ } (@itkaclsyncconfig::force_include_users)) == 0);
+
+ # No Samba machine accounts
+ next if $name =~ /\$$/;
+
+ # Initially, nobody has access.
+ $access{$name} = 0;
+
+ # The user is implicitly a member in his/her primary group.
+ my ($grnam) = getgrgid($gid);
+ if (defined($grnam)) {
+ push @{$members{$grnam}}, $name;
+ } else {
+ warn "User $name has unknown gid $gid";
+ }
+
+ # Everybody is a member of the "<everyone>" group.
+ push @{$members{'<everyone>'}}, $name;
+}
+
+my %entries = ();
+dump_recursively($itkaclsyncconfig::dns_zone . ".", undef, \%access, \%entries);
+
+do { } while (update_zone() == 0);
+
+# Don't run again before we've got updates
+utime(time(), time(), $itkaclsyncconfig::last_sync_file);
+
+sub update_zone {
+ # Dump the zone in its current form.
+ my %current_entries = ();
+ open ZONE, "dig +nocmd +nostats +nocomments -t axfr $itkaclsyncconfig::dns_zone. \@$itkaclsyncconfig::dns_server |"
+ or die "dig failed: $!";
+ while (<ZONE>) {
+ chomp;
+ /( .*? \Q$itkaclsyncconfig::dns_zone\E \. ) \s+ 10 \s+ IN \s+ A \s+ 127\.0\.0\.1 \s* $/x or next;
+ $current_entries{$1} = 1;
+
+ }
+ close ZONE;
+
+ if ($? != 0) {
+ die "dig failed with \$\? = $?";
+ }
+ if (scalar keys %current_entries < 1) {
+ die "No entries in zone, transfer probably failed.";
+ }
+
+ # Call nsupdate to update DNS.
+ # Note: We limit ourselves to 1000 records at a time due to nsupdate limitations.
+ # If we hit the limit, we'll return 0 to signal that we should try again.
+ my $num_lines = 0;
+
+ open NSUPDATE, "| nsupdate -y $itkaclsyncconfig::dns_key"
+ or die "nsupdate failed: $!";
+ print NSUPDATE "zone $itkaclsyncconfig::dns_zone.\n";
+ print NSUPDATE "server $itkaclsyncconfig::dns_server\n";
+
+ for my $entry (keys %entries) {
+ next if (exists($current_entries{$entry}));
+ last if (++$num_lines == 1000);
+ print NSUPDATE "update add $entry 10 A 127.0.0.1\n";
+ }
+ for my $entry (keys %current_entries) {
+ next if (exists($entries{$entry}));
+ last if (++$num_lines == 1000);
+ print NSUPDATE "update delete $entry\n";
+ }
+ print NSUPDATE "send\n";
+ close NSUPDATE;
+
+ print "Made $num_lines updates.\n";
+ if ($num_lines >= 1000) {
+ print "Note: Hit limit of 1000 updates, will continue in a separate transaction.\n";
+ return 0;
+ }
+ return 1;
+}
+
+sub dump_recursively {
+ my ($path, $id, $allowed, $entries) = @_;
+
+ if (defined($id)) {
+ # Find all changes to the access tree at this level in the tree.
+ my $q = $dbh->prepare('SELECT entity_type,entity,allow FROM aclentries WHERE object=? ORDER BY entity_type ASC, allow DESC');
+ $q->execute($id);
+
+ while (my $ref = $q->fetchrow_hashref) {
+ my $entity_type = $ref->{'entity_type'};
+ my $entity = $ref->{'entity'};
+ my $allow = ($ref->{'allow'} eq 'grant');
+
+ if ($entity_type eq 'user') {
+ if (!exists($allowed->{$entity})) {
+ warn "$path has an ACL entry for non-existant user $entity";
+ } else {
+ $allowed->{$entity} = $allow;
+ }
+ } elsif ($entity_type eq 'group') {
+ if (!exists($members{$entity})) {
+ warn "$path has an ACL entry for non-existant group $entity";
+ } else {
+ for my $member (@{$members{$entity}}) {
+ $allowed->{$member} = $allow;
+ }
+ }
+ }
+ }
+ }
+
+ # Output everyone who has access to this path.
+ for my $user (keys %$allowed) {
+ next if (!$allowed->{$user});
+ $entries->{"$user.$path"} = 1;
+ }
+
+ # Now, find all children.
+ my $q;
+ if (defined($id)) {
+ $q = $dbh->prepare('SELECT id,name FROM objects WHERE parent=?');
+ $q->execute($id);
+ } else {
+ $q = $dbh->prepare('SELECT id,name FROM objects WHERE parent IS NULL');
+ $q->execute;
+ }
+
+ while (my $ref = $q->fetchrow_hashref) {
+ my %allowed_copy = %$allowed;
+ dump_recursively($ref->{'name'} . "." . $path, $ref->{'id'}, \%allowed_copy, $entries);
+ }
+}
+
+# Check if we have updates since last run (or if we're forced)
+sub should_run {
+ return 1 if ($conf->force);
+ my $last_update = (stat($itkaclsyncconfig::updated_file))[10] or die "Can't get mtime for $itkaclsyncconfig::updated_file";
+ my $last_sync = (stat($itkaclsyncconfig::last_sync_file))[10] or die "Can't get mtime for $itkaclsyncconfig::last_sync_file";
+ my $last_group = (stat('/etc/group'))[10] or die "Can't get mtime for /etc/group";
+ my $last_group_db = (stat('/var/lib/misc/group.db'))[10] or die "Can't get mtime for /etc/group";
+ my $last_passwd = (stat('/etc/passwd'))[10] or die "Can't get mtime for /etc/passwd";
+ return 1 if ($last_sync - 10 < $last_update);
+ return 1 if ($last_sync - 10 < $last_group);
+ return 1 if ($last_sync - 10 < $last_group_db);
+ return 1 if ($last_sync - 10 < $last_passwd);
+
+ return 0;
+}
projects / itkacl / commitdiff