# -*- perl -*-
# $Id: errorlib.in,v 1.29 2003/06/06 17:56:05 cjwatson Exp $

sub F_SETLK { 6; } sub F_WRLCK{ 1; }
$flockstruct= 'sslll'; # And there ought to be something for this too.

sub get_hashname {
    return "" if ( $_[ 0 ] < 0 );
    return sprintf "%02d", $_[ 0 ] % 100;
}

sub unlockreadbugmerge {
    local ($rv) = @_;
    &unfilelock if $rv >= 2;
    &unfilelock if $rv >= 1;
}

sub lockreadbugmerge {
    local ($lref, $location) = @_;
    local $data;
    if (!($data = &lockreadbug($lref, $location))) { return ( 0, undef ); }
    if (!length($data{mergedwith})) { return ( 1, $data ); }
    &unfilelock;
    &filelock('lock/merge');
    if (!&lockreadbug($lref, $location)) { &unfilelock; return ( 0, undef ); }
    return ( 2, $data );
}

sub getbuglocation {
    my ( $bugnum, $ext ) = @_;
    my $archdir = sprintf "%02d", $bugnum % 100;
    return 'archive' if ( -r "$gSpoolDir/archive/$archdir/$bugnum.$ext" );
    return 'db-h' if ( -r "$gSpoolDir/db-h/$archdir/$bugnum.$ext" );
    return 'db' if ( -r "$gSpoolDir/db/$bugnum.$ext" );
    return undef;
}

sub getlocationpath {
    my ($location) = @_;
    if ($location eq 'archive') {
        return "$gSpoolDir/archive";
    } elsif ($location eq 'db') {
        return "$gSpoolDir/db";
    } else {
        return "$gSpoolDir/db-h";
    }
}

sub getbugcomponent {
    my ($bugnum, $ext, $location) = @_;

    $location = getbuglocation($bugnum, $ext) unless defined $location;
    my $dir = getlocationpath($location);
    return undef unless $dir;
    if ($location eq 'db') {
	return "$dir/$bugnum.$ext";
    } else {
	my $hash = get_hashname($bugnum);
	return "$dir/$hash/$bugnum.$ext";
    }
}

sub readbug {
    local ($lref, $location) = @_;
    my $status = getbugcomponent($lref, 'status', $location);
    return undef unless defined $status;
    if (!open(S,$status)) { return undef; }
    my %data;
    chop($data{originator}= <S>);
    chop($data{date}= <S>);
    chop($data{subject}= <S>);
    chop($data{msgid}= <S>);
    chop($data{package}= <S>);
    chop($data{keywords}= <S>);
    chop($data{done}= <S>);
    chop($data{forwarded}= <S>);
    chop($data{mergedwith}= <S>);
    chop($data{severity}= <S>);
    chop($data{versions}= <S>);
    chop($data{fixed_versions}= <S>);
    close(S);
	$data{severity} = 'normal' if $data{severity} eq '';
    return \%data;
}

sub lockreadbug {
    local ($lref, $location) = @_;
    &filelock("lock/$lref");
    my $data = readbug($lref, $location);
    &unfilelock unless defined $data;
    return $data;
}

sub writebug {
    local ($ref, $data, $location) = @_;
    my $change;
    my $status = getbugcomponent($ref, 'status', $location);
    &quit("can't find location for $ref") unless defined $status;
    open(S,"> $status.new") || &quit("opening $status.new: $!");
    print(S
          "$data->{originator}\n".
          "$data->{date}\n".
          "$data->{subject}\n".
          "$data->{msgid}\n".
          "$data->{package}\n".
          "$data->{keywords}\n".
          "$data->{done}\n".
          "$data->{forwarded}\n".
          "$data->{mergedwith}\n".
          "$data->{severity}\n".
          "$data->{versions}\n".
          "$data->{fixed_versions}\n") || &quit("writing $status.new: $!");
    close(S) || &quit("closing $status.new: $!");
    if (-e $status) {
        $change = 'change';
    } else {
        $change = 'new';
    }
    rename("$status.new",$status) ||
        &quit("installing new $status: $!");
        &bughook($change,$ref,
          "$data->{originator}\n".
          "$data->{date}\n".
          "$data->{subject}\n".
          "$data->{msgid}\n".
          "$data->{package}\n".
          "$data->{keywords}\n".
          "$data->{done}\n".
          "$data->{forwarded}\n".
          "$data->{mergedwith}\n".
          "$data->{severity}\n".
          "$data->{versions}\n".
          "$data->{fixed_versions}\n");
}

sub unlockwritebug {
    writebug(@_);
    &unfilelock;
}

sub filelock {
    # NB - NOT COMPATIBLE WITH `with-lock'
    local ($lockfile,$flockpushno,$evalstring,$count,$errors,@s1,@s2) = @_;
    $flockpushno= $#filelocks+1;
    $count= 10; $errors= '';
    for (;;) {
        $evalstring= "
            open(FLOCK${flockpushno},\"> \$lockfile\") || die \"open: \$!\";
            \$flockwant= pack(\$flockstruct,&F_WRLCK,0,0,1,0);".
                ($] >= 5.000 ? "
            fcntl(FLOCK$flockpushno,&F_SETLK,\$flockwant) || die \"setlk: \$!\";" : "
            \$z= syscall(&SYS_fcntl,fileno(FLOCK$flockpushno),&F_SETLK,\$flockwant) < 0
                 && die \"syscall fcntl setlk: \$!\";") ."
            (\@s1= lstat(\$lockfile)) || die \"lstat: \$!\";
            (\@s2= stat(FLOCK$flockpushno)) || die \"fstat: \$!\";
            join(',',\@s1) eq join(',',\@s2) || die \"file switched\";
            1;
        ";
        last if eval $evalstring;
        $errors .= $@;
        eval "close(FLOCK$flockpushno);";
        if (--$count <=0) {
            $errors =~ s/\n+$//;
            &quit("failed to get lock on file $lockfile: $errors // $evalstring");
        }
        sleep 10;
    }
    push(@cleanups,'unfilelock');
    push(@filelocks,$lockfile);
}

sub unfilelock {
    if (@filelocks == 0) {
        warn "unfilelock called with no active filelocks!\n";
        return;
    }
    local ($lockfile) = pop(@filelocks);
    pop(@cleanups);
    eval 'close(FLOCK'.($#filelocks+1).');' || warn "failed to close lock file $lockfile: $!";
    unlink($lockfile) || warn "failed to remove lock file $lockfile: $!";
}

sub quit {
    print DEBUG "quitting >$_[0]<\n";
    local ($u);
    while ($u= $cleanups[$#cleanups]) { &$u; }
    die "*** $_[0]\n";
}

%saniarray= ('<','lt', '>','gt', '&','amp', '"','quot');

sub sani {
    local ($in) = @_;
    local ($out);
    while ($in =~ m/[<>&"]/) {
        $out.= $`. '&'. $saniarray{$&}. ';';
        $in=$';
    }
    $out.= $in;
    $out;
}

sub update_realtime {
	my ($file, $bug, $new) = @_;

	# update realtime index.db

	open(IDXDB, "<$file") or die "Couldn't open $file";
	open(IDXNEW, ">$file.new");

	my $line;
	my @line;
	while($line = <IDXDB>) {
		@line = split /\s/, $line;
		last if ($line[1] >= $bug);
		print IDXNEW $line;
		$line = "";
	}

	if ($new eq "NOCHANGE") {
		print IDXNEW $line if ($line ne "" && $line[1] == $ref);
	} elsif ($new eq "REMOVE") {
		0;
	} else {
		print IDXNEW $new;
	}
	if ($line ne "" && $line[1] > $bug) {
		print IDXNEW $line;
		$line = "";
	}

	print IDXNEW while(<IDXDB>);

	close(IDXNEW);
	close(IDXDB);

	rename("$file.new", $file);

	return $line;
}

sub bughook_archive {
	my $ref = shift;
	&filelock("debbugs.trace.lock");
	&appendfile("debbugs.trace","archive $ref\n");
	my $line = update_realtime(
		"$gSpoolDir/index.db.realtime", 
		$ref,
		"REMOVE");
	update_realtime("$gSpoolDir/index.archive.realtime",
		$ref, $line);
	&unfilelock;
}	

sub bughook {
	my ( $type, $ref ) = ( shift, shift );
	&filelock("debbugs.trace.lock");

	&appendfile("debbugs.trace","$type $ref\n",@_);

	my @stuff=split /\n/, "$_[0]\n\n\n\n\n\n\n";

	my $whendone = "open";
	my $severity = $gDefaultSeverity;
	(my $pkglist = $stuff[4]) =~ s/[,\s]+/,/g;
	$pkglist =~ s/^,+//;
	$pkglist =~ s/,+$//;
	$whendone = "forwarded" if length $stuff[7];
	$whendone = "done" if length $stuff[6];
	$severity = $stuff[9] if length $stuff[9];

	my $k = sprintf "%s %d %d %s [%s] %s %s\n",
			$pkglist, $ref, $stuff[1], $whendone, $stuff[0],
			$severity, $stuff[5];

	update_realtime("$gSpoolDir/index.db.realtime", $ref, $k);

	&unfilelock;
}

sub appendfile {
	my $file = shift;
	if (!open(AP,">>$file")) {
		print DEBUG "failed open log<\n";
		print DEBUG "failed open log err $!<\n";
		&quit("opening $file (appendfile): $!");
	}
	print(AP @_) || &quit("writing $file (appendfile): $!");
	close(AP) || &quit("closing $file (appendfile): $!");
}

sub getmailbody {
	my $entity = shift;
	my $type = $entity->effective_type;
	if ($type eq 'text/plain' or
	    ($type =~ m#text/# and $type ne 'text/html') or
	    $type eq 'application/pgp') {
		return $entity->bodyhandle;
	} elsif ($type eq 'multipart/alternative') {
		# RFC 2046 says we should use the last part we recognize.
		for my $part (reverse $entity->parts) {
			my $ret = getmailbody($part);
			return $ret if $ret;
		}
	} else {
		# For other multipart types, we just pretend they're
		# multipart/mixed and run through in order.
		for my $part ($entity->parts) {
			my $ret = getmailbody($part);
			return $ret if $ret;
		}
	}
	return undef;
}

sub escapelog {
	my @log = @_;
	map { s/^([\01-\07\030])/\030$1/gm } @log;
	return \@log;
}


@severities= grep { not exists $gObsoleteSeverities{$_} } @gSeverityList;
@showseverities= @severities;
grep ($_= $_ eq '' ? $gDefaultSeverity : $_, @showseverities);
@strongseverities= @gStrongSeverities;
%displayshowseverities= %gSeverityDisplay;

1;