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root |
1.1 |
package folder; |
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BEGIN { *slog = \&::slog }; |
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1.4 |
use Fcntl; |
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use File::Sync (); |
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use Inline Config => NAME => "syncmail::folder"; |
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use Inline C; |
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1.2 |
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1.1 |
use constant MDIFVERSION => 1; |
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1.4 |
BEGIN { |
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if (1) { |
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use OpenSSL (); |
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*hash = \&OpenSSL::Digest::sha1_hex; |
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} elsif (0) { |
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# use Digest::SHA1 (); |
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my $digest = new Digest::SHA1; |
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*hash = sub { |
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$digest->reset; |
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$digest->add(@_); |
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$mid = $digest->hexdigest; |
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}; |
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} |
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} |
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1.6 |
sub fflush { |
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1.4 |
my $oldfh = select $_[0]; |
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1.6 |
$| = 1; $| = 0; |
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1.4 |
select $oldfh; |
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} |
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# rename a file and fsync the directory |
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sub replace { |
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my ($src, $dst) = @_; |
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my $self = shift; |
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rename $src, $dst; |
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$dst =~ s/[^\/]*$/./; |
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# now sync the directory |
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open my $dir, "<", $dst |
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or die "$dst: $!"; |
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File::Sync::fsync($dir); |
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} |
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1.1 |
sub new { |
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my $class = shift; |
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my %arg = @_; |
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1.4 |
my $self = bless { |
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1.1 |
path => "$::PREFIX/$arg{name}", |
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%arg, |
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}, $class; |
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1.4 |
$self->open(0); |
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$self; |
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1.1 |
} |
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sub dirty { |
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$_[0]{dirty} = 1; |
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} |
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sub DESTROY { |
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1.5 |
#$_[0]->write_mdif; # do NOT! |
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1.1 |
} |
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# parse_mbox(mbox-file-path, callback) |
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# callback gets called with \$header and \$body, |
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# $header includes the mbox From_ line without |
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# the leading From_ itself. |
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sub parse_mbox { |
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1.4 |
my ($fh, $cb) = @_; |
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1.1 |
|
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local $/ = "\n\n"; |
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my ($head, $body, $offs); |
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1.4 |
read $fh, $head, 5; |
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1.1 |
|
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1.4 |
$head eq "From " or $head eq "" |
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1.1 |
or return; |
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$offs = 0; |
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while (defined ($head = <$fh>)) { |
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$head =~ /^.*? [A-Z][a-z][a-z] [A-Z][a-z][a-z] [ 0-9][0-9] \d\d:\d\d:\d\d(?: [+-]\d\d\d\d)? \d\d(?:\d\d)\n/ |
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or die "$path: not standard mbox format header:\n$head\n"; |
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local $/ = "\nFrom "; |
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# NEVER enable this. content-length simply is broken by design |
93 |
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#if ($head =~ /^Content-Length:\s+(\d+)$/im) { |
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# $1 <= read $fh, $body, $1 + 5 |
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# or die "$path: partial message in mbox"; |
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#} else { |
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$body = <$fh>; |
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#} |
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chomp $body; |
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$cb->($offs, \$head, \$body); |
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$offs = (tell $fh) - 5; |
102 |
root |
1.4 |
&::give unless ++$ecnt & 255; |
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root |
1.1 |
} |
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1; |
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} |
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sub conf_path { |
109 |
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(my $conf = $_[0]{path}) =~ s%([^/]+$)%.$1.mdif%; |
110 |
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$conf; |
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} |
112 |
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113 |
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sub read_mdif { |
114 |
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my $self = shift; |
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my $path = $self->conf_path; |
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117 |
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return if $self->{idx}; |
118 |
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open my $fh, "<", $path |
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or return; |
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defined ($_ = <$fh>) |
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or die "$path: empty mdif file\n"; |
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do { |
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if ($_ eq "[SYNCMAIL]\n") { |
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while (<$fh>) { |
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last unless /^([a-z]+)\s*=\s*(.*)\n$/; |
129 |
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$self->{$1} = $2; |
130 |
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} |
131 |
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} elsif ($_ eq "[HOSTS]\n") { |
132 |
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while (<$fh>) { |
133 |
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last unless /^([^[].*)=(.*)\n$/; |
134 |
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$self->{host}{$1} = $2; |
135 |
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} |
136 |
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} elsif (/^\[DIFF (\d+)\]\n$/) { |
137 |
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my $mtime = $1; |
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1.2 |
my (@add, @del); |
139 |
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1.1 |
while (<$fh>) { |
140 |
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1.2 |
last unless /^([+-])(.*)\n$/; |
141 |
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if ($1 eq "+") { |
142 |
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push @add, $2; |
143 |
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} else { |
144 |
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push @del, $2; |
145 |
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} |
146 |
root |
1.1 |
} |
147 |
root |
1.2 |
unshift @{$self->{diff}}, [$mtime, \@add, \@del]; |
148 |
root |
1.1 |
} elsif ($_ eq "[INDEX]\n") { |
149 |
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my @idx; |
150 |
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while (<$fh>) { |
151 |
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last unless /^(\d+)=(.*)\n$/; |
152 |
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push @idx, [$1, $2]; |
153 |
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} |
154 |
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$self->{idx} = \@idx; |
155 |
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} elsif (/^#/) { |
156 |
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$_ = <$fh>; |
157 |
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# nop |
158 |
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} else { |
159 |
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die "$path: unparseable section '$_'\n"; |
160 |
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} |
161 |
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} while defined $_; |
162 |
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163 |
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$self->{version} <= MDIFVERSION |
164 |
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or die "$path: version mismatch ($self->{version} found, <".MDIFVERSION." expected)\n"; |
165 |
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} |
166 |
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167 |
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sub write_mdif { |
168 |
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my $self = shift; |
169 |
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my $path = $self->conf_path; |
170 |
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171 |
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return unless $self->{dirty}; |
172 |
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173 |
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open my $fh, ">", "$path~" |
174 |
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or die "$path~: $!"; |
175 |
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176 |
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print $fh "# automatically generated, do NOT edit\n"; |
177 |
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print $fh "[SYNCMAIL]\n"; |
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root |
1.3 |
print $fh "$_=$self->{$_}\n" for (qw(fsize mtime version ctime)); |
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root |
1.1 |
|
181 |
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print $fh "[HOSTS]\n"; |
182 |
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while (my ($k,$v) = each %{$self->{host}}) { |
183 |
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print $fh "$k=$v\n"; |
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} |
185 |
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186 |
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print $fh "[INDEX]\n"; |
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print $fh "$_->[0]=$_->[1]\n" for @{$self->{idx}}; |
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for (reverse @{$self->{diff}}) { |
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print $fh "[DIFF $_->[0]]\n"; |
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root |
1.2 |
print $fh "+$_\n" for @{$_->[1]}; |
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print $fh "-$_\n" for @{$_->[2]}; |
193 |
root |
1.1 |
} |
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root |
1.6 |
fflush($fh); |
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root |
1.4 |
File::Sync::fsync($fh); |
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root |
1.1 |
close $fh |
198 |
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or die "$path~: unable to create updated .mdif: $!"; |
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200 |
root |
1.4 |
replace("$path~", $path); |
201 |
root |
1.1 |
|
202 |
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delete $self->{dirty}; |
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} |
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205 |
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sub gendiff { |
206 |
root |
1.4 |
my ($self, $d1, $d2) = @_; |
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root |
1.1 |
|
208 |
root |
1.2 |
my (@add, @del); |
209 |
root |
1.1 |
my (%d1, %d2); |
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211 |
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for (@$d2) { |
212 |
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undef $d2{$_->[1]}; |
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} |
214 |
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215 |
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# delete msgs in d1 but not in d2 |
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for (@$d1) { |
217 |
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undef $d1{$_->[1]}; |
218 |
root |
1.2 |
push @del, $_->[1] unless exists $d2{$_->[1]}; |
219 |
root |
1.1 |
} |
220 |
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%d2 = (); # conserve memory |
221 |
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222 |
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# add msgs in d2 but not in d1 |
223 |
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for (@$d2) { |
224 |
root |
1.2 |
push @add, $_->[1] unless exists $d1{$_->[1]}; |
225 |
root |
1.1 |
} |
226 |
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227 |
root |
1.4 |
push @{$self->{diff}}, [ |
228 |
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$self->{ctime}, |
229 |
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\@add, \@del, |
230 |
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] if @add || @del; |
231 |
root |
1.1 |
} |
232 |
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233 |
root |
1.5 |
sub open { |
234 |
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my ($self, $rw) = @_; |
235 |
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236 |
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if (!$self->{fh} || $self->{rw} != $rw) { |
237 |
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$self->close; |
238 |
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$self->{rw} = $rw; |
239 |
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sysopen $self->{fh}, $self->{path}, |
240 |
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O_CREAT | ($rw ? O_RDWR : O_RDONLY), |
241 |
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0666 |
242 |
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or die "$self->{path}: $!"; |
243 |
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0 == setlkw(fileno $self->{fh}, $rw ? 2 : 1) |
244 |
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or die "$self->{path}: $!"; |
245 |
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246 |
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$self->check; |
247 |
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} |
248 |
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} |
249 |
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250 |
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sub close { |
251 |
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my $self = shift; |
252 |
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253 |
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if ($self->{rw} && $self->{fh}) { |
254 |
root |
1.6 |
fflush($self->{fh}); |
255 |
root |
1.5 |
File::Sync::fsync($self->{fh}); |
256 |
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} |
257 |
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258 |
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$self->write_mdif; |
259 |
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260 |
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delete $self->{fh}; |
261 |
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} |
262 |
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263 |
root |
1.1 |
sub check { |
264 |
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my $self = shift; |
265 |
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my $conf = $self->conf_path; |
266 |
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my $guard = $::lockdisk->guard; |
267 |
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268 |
root |
1.5 |
slog 3, "checking $self->{path}\n"; |
269 |
root |
1.1 |
|
270 |
root |
1.5 |
my ($fsize, $mtime) = (stat $self->{fh})[7, 9]; |
271 |
root |
1.1 |
|
272 |
root |
1.5 |
if ($self->{idx}) { |
273 |
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return 1 if $fsize == $self->{fsize} |
274 |
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&& $mtime == $self->{mtime}; |
275 |
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} else { |
276 |
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if (open my $fh, "<", $conf) { |
277 |
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my %conf; |
278 |
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<$fh>; # skip initial comment |
279 |
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<$fh> eq "[SYNCMAIL]\n" |
280 |
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or die "$conf: format error"; |
281 |
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while (<$fh> =~ /^([a-z]+)\s*=\s*(.*)$/) { |
282 |
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$conf{$1} = $2; |
283 |
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} |
284 |
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return 1 if $fsize == $conf{fsize} |
285 |
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&& $mtime == $conf{mtime}; |
286 |
root |
1.1 |
|
287 |
root |
1.5 |
$conf{mtime} <= $mtime |
288 |
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or die "$self->{path}: folder older than mdif"; |
289 |
root |
1.1 |
} |
290 |
root |
1.4 |
} |
291 |
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292 |
root |
1.5 |
slog 2, "updating $self->{path}\n"; |
293 |
root |
1.1 |
|
294 |
root |
1.4 |
my @idx; |
295 |
root |
1.1 |
|
296 |
root |
1.5 |
seek $self->{fh}, 0, SEEK_SET; |
297 |
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298 |
root |
1.4 |
parse_mbox $self->{fh}, sub { |
299 |
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my ($offs, $head, $body) = @_; |
300 |
root |
1.5 |
push @idx, [$offs, hash($$head, "\n\n", $$body)]; |
301 |
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} or die "$self->{path}: no valid mbox file"; |
302 |
root |
1.1 |
|
303 |
root |
1.4 |
$self->read_mdif; |
304 |
root |
1.1 |
|
305 |
root |
1.4 |
$self->{version} ||= MDIFVERSION; |
306 |
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$self->{ctime} = time; |
307 |
root |
1.1 |
|
308 |
root |
1.4 |
$self->gendiff($self->{idx}, \@idx); |
309 |
root |
1.3 |
|
310 |
root |
1.4 |
$self->{fsize} = $fsize; |
311 |
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$self->{mtime} = $mtime; |
312 |
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$self->{idx} = \@idx; |
313 |
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314 |
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$self->dirty; |
315 |
root |
1.5 |
$self->write_mdif;#d# |
316 |
root |
1.4 |
} |
317 |
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318 |
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sub inventory { |
319 |
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hash sort map { $_->[1] } @{$_[0]{idx}}; |
320 |
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} |
321 |
root |
1.1 |
|
322 |
root |
1.5 |
sub iidx { |
323 |
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my $self = shift; |
324 |
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325 |
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$self->{iidx} ||= do { |
326 |
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my %iidx; |
327 |
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my $idx = $self->{idx}; |
328 |
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329 |
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push @$idx, [$self->{fsize}]; |
330 |
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my $ofs = 0; |
331 |
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for (0 .. @$idx - 2) { |
332 |
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$iidx{$idx->[$_][1]} = [$idx->[$_][0], $idx->[$_+1][0] - $idx->[$_][0]]; |
333 |
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} |
334 |
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pop @$idx, [$self->{fsize}]; |
335 |
root |
1.1 |
|
336 |
root |
1.5 |
\%iidx; |
337 |
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}; |
338 |
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} |
339 |
root |
1.1 |
|
340 |
root |
1.5 |
sub exists { |
341 |
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$_[0]->iidx unless $_[0]{iidx}; |
342 |
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return $_[0]{iidx}{$_[1]}; |
343 |
root |
1.1 |
} |
344 |
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345 |
root |
1.5 |
sub fetch { |
346 |
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my ($self, $hash) = @_; |
347 |
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348 |
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$self->iidx unless $self->{iidx}; |
349 |
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350 |
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my $mail; |
351 |
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352 |
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my $msg = $self->{iidx}{$hash} |
353 |
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or die "$hash: no such message in $self->{path}"; |
354 |
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355 |
root |
1.6 |
print STDERR "$self->{fh}, $msg->[0], SEEK_SET\n";#d# |
356 |
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357 |
root |
1.5 |
seek $self->{fh}, $msg->[0], SEEK_SET |
358 |
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or die "$self->{path}: $!"; |
359 |
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360 |
root |
1.6 |
print STDERR "$msg->[1] == read $self->{fh}, $msg->[1]\n";#d# |
361 |
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362 |
root |
1.5 |
$msg->[1] == read $self->{fh}, $mail, $msg->[1] |
363 |
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or die "$self->{path}: $!"; |
364 |
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365 |
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$mail =~ /^From \S/ |
366 |
|
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or die "$self->{path}: mail folder corrupted"; |
367 |
root |
1.4 |
|
368 |
root |
1.5 |
$mail; |
369 |
root |
1.4 |
} |
370 |
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|
371 |
|
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# begin updating folder |
372 |
|
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sub begin_update { |
373 |
|
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my $self = shift; |
374 |
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|
375 |
|
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$self->{oidx} = $self->{idx}; |
376 |
|
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} |
377 |
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378 |
|
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sub delete { |
379 |
|
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my $self = shift; |
380 |
|
|
my $temp = "$self->{path}~"; |
381 |
|
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|
382 |
root |
1.5 |
$self->iidx unless $self->{iidx}; |
383 |
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|
384 |
|
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for (@_) { |
385 |
|
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if (exists $self->{iidx}{$_}) { # at least one message exists |
386 |
|
|
my $guard = $::lockdisk->guard; |
387 |
|
|
my %del; @del{@_} = (); |
388 |
|
|
my @nidx; |
389 |
root |
1.6 |
my $dofs = 0; |
390 |
root |
1.5 |
|
391 |
root |
1.6 |
open my $fh, "+>", $temp |
392 |
root |
1.5 |
or die "$temp: $!"; |
393 |
|
|
|
394 |
|
|
eval { |
395 |
|
|
0 == setlkw(fileno $fh, 2) |
396 |
|
|
or die "$self->{path}~: $!"; |
397 |
root |
1.4 |
|
398 |
root |
1.5 |
$self->{fsize} = 0; # we virtually truncated the file |
399 |
root |
1.4 |
|
400 |
root |
1.5 |
for (@{delete $self->{idx}}) { |
401 |
|
|
my $hash = $_->[1]; |
402 |
|
|
my $buf; |
403 |
|
|
|
404 |
|
|
unless (exists $del{$hash}) { |
405 |
|
|
my ($ofs, $len) = @{$self->{iidx}{$hash}}; |
406 |
root |
1.4 |
|
407 |
root |
1.5 |
$len or die; |
408 |
root |
1.4 |
|
409 |
root |
1.5 |
seek $self->{fh}, $ofs, SEEK_SET |
410 |
|
|
or die "$self->{path}: $!"; |
411 |
root |
1.4 |
|
412 |
root |
1.5 |
$len == read $self->{fh}, $buf, $len |
413 |
|
|
or die "$self->{path}: $!"; |
414 |
root |
1.4 |
|
415 |
root |
1.5 |
$buf =~ /^From \S/ |
416 |
|
|
or die "$self->{path}: corrupted mail folder"; |
417 |
root |
1.4 |
|
418 |
root |
1.5 |
print $fh $buf |
419 |
|
|
or die "$self->{path}: $!"; |
420 |
root |
1.4 |
|
421 |
root |
1.5 |
push @nidx, [$dofs, $hash]; |
422 |
|
|
$self->{iidx}{$hash}[0] = $dofs; |
423 |
|
|
$dofs += $len; |
424 |
root |
1.4 |
|
425 |
root |
1.5 |
&::give unless ++$ecnt & 255; |
426 |
|
|
} else { |
427 |
|
|
delete $self->{iidx}{$hash}; |
428 |
|
|
slog 0, "skipping/deleting $hash\n"; |
429 |
|
|
} |
430 |
|
|
} |
431 |
|
|
}; |
432 |
root |
1.4 |
|
433 |
root |
1.5 |
if ($@) { |
434 |
|
|
close $fh; |
435 |
|
|
unlink $temp; |
436 |
|
|
die; |
437 |
root |
1.4 |
} |
438 |
root |
1.5 |
|
439 |
root |
1.6 |
fflush($fh); |
440 |
root |
1.5 |
File::Sync::fsync($fh); |
441 |
|
|
replace $temp, $self->{path}; |
442 |
|
|
|
443 |
|
|
$self->{fh} = $fh; |
444 |
|
|
$self->{rw} = 1; |
445 |
|
|
|
446 |
|
|
delete $self->{iidx}; |
447 |
|
|
|
448 |
|
|
$self->{idx} = \@nidx; |
449 |
root |
1.6 |
$self->{fsize} = $dofs; |
450 |
root |
1.5 |
|
451 |
|
|
return; |
452 |
root |
1.4 |
} |
453 |
root |
1.5 |
} |
454 |
|
|
} |
455 |
|
|
|
456 |
|
|
sub append { |
457 |
|
|
my ($self, $hash, $mail) = @_; |
458 |
|
|
|
459 |
|
|
if (length $mail) { |
460 |
|
|
$self->open(1); |
461 |
|
|
|
462 |
|
|
seek $self->{fh}, $self->{fsize}, SEEK_SET |
463 |
|
|
or die "$self->{path}: $!"; |
464 |
root |
1.4 |
|
465 |
root |
1.5 |
print {$self->{fh}} $mail |
466 |
|
|
or die "$self->{path}: $!"; |
467 |
root |
1.4 |
|
468 |
root |
1.5 |
push @{$self->{idx}}, [$self->{fsize}, $hash]; |
469 |
|
|
$self->{fsize} += length $mail; |
470 |
root |
1.4 |
} |
471 |
|
|
} |
472 |
|
|
|
473 |
|
|
sub end_update { |
474 |
root |
1.5 |
my $self = shift; |
475 |
|
|
|
476 |
root |
1.6 |
$self->gendiff((delete $self->{oidx}), $self->{idx}); |
477 |
root |
1.5 |
|
478 |
root |
1.6 |
fflush($self->{fh}); |
479 |
root |
1.5 |
File::Sync::fsync($self->{fh}); |
480 |
|
|
|
481 |
|
|
stat $self->{fh} |
482 |
|
|
or die "$self->{path}: $!"; |
483 |
root |
1.4 |
|
484 |
root |
1.5 |
$self->{fsize} = (stat _)[7]; |
485 |
|
|
$self->{mtime} = (stat _)[9]; |
486 |
root |
1.4 |
|
487 |
root |
1.5 |
$self->dirty; |
488 |
root |
1.4 |
} |
489 |
|
|
|
490 |
root |
1.1 |
1; |
491 |
root |
1.4 |
|
492 |
|
|
__DATA__ |
493 |
|
|
__C__ |
494 |
|
|
#include <unistd.h> |
495 |
|
|
#include <fcntl.h> |
496 |
|
|
|
497 |
|
|
/* mode0 unlock, mode1 rlock, mode2 rwlock */ |
498 |
|
|
int setlkw(int fd, int mode) |
499 |
|
|
{ |
500 |
|
|
struct flock l; |
501 |
|
|
|
502 |
|
|
l.l_type = mode == 0 ? F_UNLCK |
503 |
|
|
: mode == 1 ? F_RDLCK |
504 |
|
|
: F_WRLCK; |
505 |
|
|
l.l_whence = SEEK_SET; |
506 |
|
|
l.l_start = 0; |
507 |
|
|
l.l_len = 0; |
508 |
|
|
|
509 |
|
|
return fcntl (fd, F_SETLKW, &l); |
510 |
|
|
} |
511 |
root |
1.1 |
|