# -*- perl -*-
# $Id: errorlib.in,v 1.3 1999/12/01 18:04:01 gecko Exp $

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

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

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

sub lockreadbug {
    local ($lref) = @_;
    &filelock("lock/$lref");
    if (!open(S,"db/$lref.status")) { &unfilelock; return 0; }
    chop($s_originator= <S>);
    chop($s_date= <S>);
    chop($s_subject= <S>);
    chop($s_msgid= <S>);
    chop($s_package= <S>);
    chop($s_keywords= <S>);
    chop($s_done= <S>);
    chop($s_forwarded= <S>);
    chop($s_mergedwith= <S>);
    chop($s_severity= <S>);
    close(S);
	$s_severity = 'normal' if $s_severity eq '';
    return 1;
}

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 {
    local ($lockfile) = pop(@filelocks);
    pop(@cleanups);
    eval 'close(FLOCK'.($#filelocks+1).');' || warn "failed to close lock file: $!";
    unlink($lockfile) || warn "failed to remove lock file: $!";
}

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;
}

@severities= @gSeverityList;
@showseverities= @severities;
grep ($_= $_ eq '' ? $gDefaultSeverity : $_, @showseverities);
@strongseverities= @gStrongSeverities;
%displayshowseverities= %gSeverityDisplay;

1;
