| 1 | package folder; |
1 | package folder; |
| 2 | |
2 | |
| 3 | BEGIN { *slog = \&::slog }; |
3 | BEGIN { *slog = \&::slog }; |
| 4 | |
4 | |
| 5 | use Digest::SHA1; |
5 | use Fcntl; |
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6 | use File::Sync (); |
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7 | |
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8 | use Inline Config => NAME => "syncmail::folder"; |
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9 | use Inline C; |
| 6 | |
10 | |
| 7 | use constant MDIFVERSION => 1; |
11 | use constant MDIFVERSION => 1; |
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12 | |
|
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13 | BEGIN { |
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14 | if (1) { |
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15 | use OpenSSL (); |
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16 | *hash = \&OpenSSL::Digest::sha1_hex; |
|
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17 | } elsif (0) { |
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18 | # use Digest::SHA1 (); |
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19 | my $digest = new Digest::SHA1; |
|
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20 | *hash = sub { |
|
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21 | $digest->reset; |
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22 | $digest->add(@_); |
|
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23 | $mid = $digest->hexdigest; |
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24 | }; |
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25 | } |
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26 | } |
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27 | |
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28 | sub fflush { |
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29 | my $oldfh = select $_[0]; |
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30 | $| = 1; $| = 0; |
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31 | select $oldfh; |
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32 | } |
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33 | |
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34 | # rename a file and fsync the directory |
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35 | sub replace { |
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36 | my ($src, $dst) = @_; |
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37 | my $self = shift; |
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38 | |
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39 | rename $src, $dst; |
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40 | |
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41 | $dst =~ s/[^\/]*$/./; |
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42 | |
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43 | # now sync the directory |
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44 | |
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45 | open my $dir, "<", $dst |
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46 | or die "$dst: $!"; |
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47 | |
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48 | File::Sync::fsync($dir); |
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49 | } |
| 8 | |
50 | |
| 9 | sub new { |
51 | sub new { |
| 10 | my $class = shift; |
52 | my $class = shift; |
| 11 | my %arg = @_; |
53 | my %arg = @_; |
| 12 | bless { |
54 | my $self = bless { |
| 13 | path => "$::PREFIX/$arg{name}", |
55 | path => "$::PREFIX/$arg{name}", |
| 14 | %arg, |
56 | %arg, |
| 15 | }, $class; |
57 | }, $class; |
|
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58 | $self->open(0); |
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59 | $self; |
| 16 | } |
60 | } |
| 17 | |
61 | |
| 18 | sub dirty { |
62 | sub dirty { |
| 19 | $_[0]{dirty} = 1; |
63 | $_[0]{dirty} = 1; |
| 20 | } |
64 | } |
| 21 | |
65 | |
| 22 | sub DESTROY { |
66 | sub DESTROY { |
| 23 | $_[0]->write_mdif; |
67 | #$_[0]->write_mdif; # do NOT! |
| 24 | } |
68 | } |
| 25 | |
69 | |
| 26 | # parse_mbox(mbox-file-path, callback) |
70 | # parse_mbox(mbox-file-path, callback) |
| 27 | # callback gets called with \$header and \$body, |
71 | # callback gets called with \$header and \$body, |
| 28 | # $header includes the mbox From_ line without |
72 | # $header includes the mbox From_ line without |
| 29 | # the leading From_ itself. |
73 | # the leading From_ itself. |
| 30 | sub parse_mbox { |
74 | sub parse_mbox { |
| 31 | my ($path, $cb) = @_; |
75 | my ($fh, $cb) = @_; |
| 32 | |
|
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| 33 | open my $fh, "<", $path |
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| 34 | or die "$path: $!"; |
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| 35 | |
76 | |
| 36 | local $/ = "\n\n"; |
77 | local $/ = "\n\n"; |
| 37 | |
78 | |
| 38 | my ($head, $body, $offs); |
79 | my ($head, $body, $offs); |
| 39 | |
80 | |
| 40 | 5 == read $fh, $head, 5 |
81 | read $fh, $head, 5; |
| 41 | or return; |
|
|
| 42 | |
82 | |
| 43 | $head eq "From " |
83 | $head eq "From " or $head eq "" |
| 44 | or return; |
84 | or return; |
| 45 | |
85 | |
| 46 | $offs = 0; |
86 | $offs = 0; |
| 47 | while (defined ($head = <$fh>)) { |
87 | while (defined ($head = <$fh>)) { |
| 48 | $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/ |
88 | $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/ |
| … | |
… | |
| 57 | $body = <$fh>; |
97 | $body = <$fh>; |
| 58 | #} |
98 | #} |
| 59 | chomp $body; |
99 | chomp $body; |
| 60 | $cb->($offs, \$head, \$body); |
100 | $cb->($offs, \$head, \$body); |
| 61 | $offs = (tell $fh) - 5; |
101 | $offs = (tell $fh) - 5; |
| 62 | ::give unless ++$ecnt & 1023; |
102 | &::give unless ++$ecnt & 255; |
| 63 | } |
103 | } |
| 64 | |
104 | |
| 65 | 1; |
105 | 1; |
| 66 | } |
106 | } |
| 67 | |
107 | |
| … | |
… | |
| 150 | print $fh "[DIFF $_->[0]]\n"; |
190 | print $fh "[DIFF $_->[0]]\n"; |
| 151 | print $fh "+$_\n" for @{$_->[1]}; |
191 | print $fh "+$_\n" for @{$_->[1]}; |
| 152 | print $fh "-$_\n" for @{$_->[2]}; |
192 | print $fh "-$_\n" for @{$_->[2]}; |
| 153 | } |
193 | } |
| 154 | |
194 | |
|
|
195 | fflush($fh); |
|
|
196 | File::Sync::fsync($fh); |
| 155 | close $fh |
197 | close $fh |
| 156 | or die "$path~: unable to create updated .mdif: $!"; |
198 | or die "$path~: unable to create updated .mdif: $!"; |
| 157 | |
199 | |
| 158 | rename "$path~", $path; |
200 | replace("$path~", $path); |
| 159 | |
201 | |
| 160 | delete $self->{dirty}; |
202 | delete $self->{dirty}; |
| 161 | } |
203 | } |
| 162 | |
204 | |
| 163 | if (1) { |
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| 164 | use OpenSSL (); |
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| 165 | *hash = \&OpenSSL::Digest::sha1_hex; |
|
|
| 166 | } elsif (0) { |
|
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| 167 | # use Digest::SHA1; |
|
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| 168 | my $digest = new Digest::SHA1; |
|
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| 169 | *hash = sub { |
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| 170 | $digest->reset; |
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| 171 | $digest->add(@_); |
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| 172 | $mid = $digest->hexdigest; |
|
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| 173 | }; |
|
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| 174 | } |
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| 175 | |
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| 176 | sub gendiff { |
205 | sub gendiff { |
| 177 | my ($d1, $d2) = @_; |
206 | my ($self, $d1, $d2) = @_; |
| 178 | |
207 | |
| 179 | my (@add, @del); |
208 | my (@add, @del); |
| 180 | my (%d1, %d2); |
209 | my (%d1, %d2); |
| 181 | |
210 | |
| 182 | for (@$d2) { |
211 | for (@$d2) { |
| … | |
… | |
| 193 | # add msgs in d2 but not in d1 |
222 | # add msgs in d2 but not in d1 |
| 194 | for (@$d2) { |
223 | for (@$d2) { |
| 195 | push @add, $_->[1] unless exists $d1{$_->[1]}; |
224 | push @add, $_->[1] unless exists $d1{$_->[1]}; |
| 196 | } |
225 | } |
| 197 | |
226 | |
|
|
227 | push @{$self->{diff}}, [ |
|
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228 | $self->{ctime}, |
| 198 | (\@add, \@del); |
229 | \@add, \@del, |
|
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230 | ] if @add || @del; |
|
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231 | } |
|
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232 | |
|
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233 | sub open { |
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234 | my ($self, $rw) = @_; |
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235 | |
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236 | if (!$self->{fh} || $self->{rw} != $rw) { |
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237 | $self->close; |
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238 | $self->{rw} = $rw; |
|
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239 | sysopen $self->{fh}, $self->{path}, |
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240 | O_CREAT | ($rw ? O_RDWR : O_RDONLY), |
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241 | 0666 |
|
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242 | or die "$self->{path}: $!"; |
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243 | 0 == setlkw(fileno $self->{fh}, $rw ? 2 : 1) |
|
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244 | or die "$self->{path}: $!"; |
|
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245 | |
|
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246 | $self->check; |
|
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247 | } |
|
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248 | } |
|
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249 | |
|
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250 | sub close { |
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251 | my $self = shift; |
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252 | |
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253 | if ($self->{rw} && $self->{fh}) { |
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254 | fflush($self->{fh}); |
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255 | File::Sync::fsync($self->{fh}); |
|
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256 | } |
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257 | |
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258 | $self->write_mdif; |
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259 | |
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260 | delete $self->{fh}; |
| 199 | } |
261 | } |
| 200 | |
262 | |
| 201 | sub check { |
263 | sub check { |
| 202 | my $self = shift; |
264 | my $self = shift; |
| 203 | my $path = $self->{path}; |
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|
| 204 | my $conf = $self->conf_path; |
265 | my $conf = $self->conf_path; |
| 205 | my $guard = $::lockdisk->guard; |
266 | my $guard = $::lockdisk->guard; |
| 206 | |
267 | |
| 207 | slog 3, "checking $path\n"; |
268 | slog 3, "checking $self->{path}\n"; |
| 208 | |
269 | |
| 209 | if (stat $path) { |
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| 210 | my ($fsize, $mtime) = (stat _)[7, 9]; |
270 | my ($fsize, $mtime) = (stat $self->{fh})[7, 9]; |
| 211 | |
271 | |
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272 | if ($self->{idx}) { |
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273 | return 1 if $fsize == $self->{fsize} |
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274 | && $mtime == $self->{mtime}; |
|
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275 | } else { |
| 212 | if (open my $fh, "<", $conf) { |
276 | if (open my $fh, "<", $conf) { |
| 213 | my %conf; |
277 | my %conf; |
| 214 | <$fh>; # skip initial comment |
278 | <$fh>; # skip initial comment |
| 215 | <$fh> eq "[SYNCMAIL]\n" |
279 | <$fh> eq "[SYNCMAIL]\n" |
| 216 | or die "$conf: format error"; |
280 | or die "$conf: format error"; |
| … | |
… | |
| 219 | } |
283 | } |
| 220 | return 1 if $fsize == $conf{fsize} |
284 | return 1 if $fsize == $conf{fsize} |
| 221 | && $mtime == $conf{mtime}; |
285 | && $mtime == $conf{mtime}; |
| 222 | |
286 | |
| 223 | $conf{mtime} <= $mtime |
287 | $conf{mtime} <= $mtime |
| 224 | or die "$path: folder older than mdif"; |
288 | or die "$self->{path}: folder older than mdif"; |
| 225 | } |
289 | } |
|
|
290 | } |
| 226 | |
291 | |
| 227 | slog 2, "updating $path\n"; |
292 | slog 2, "updating $self->{path}\n"; |
| 228 | |
293 | |
| 229 | my @idx; |
294 | my @idx; |
| 230 | |
295 | |
|
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296 | seek $self->{fh}, 0, SEEK_SET; |
|
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297 | |
| 231 | parse_mbox $path, sub { |
298 | parse_mbox $self->{fh}, sub { |
| 232 | my ($offs, $head, $body) = @_; |
299 | my ($offs, $head, $body) = @_; |
| 233 | push @idx, [$offs, hash($$head, "\0", $$body)]; |
300 | push @idx, [$offs, hash($$head, "\n\n", $$body)]; |
| 234 | } or return (); |
301 | } or die "$self->{path}: no valid mbox file"; |
| 235 | |
302 | |
| 236 | $self->read_mdif; |
303 | $self->read_mdif; |
| 237 | |
304 | |
| 238 | $self->{version} ||= MDIFVERSION; |
305 | $self->{version} ||= MDIFVERSION; |
|
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306 | $self->{ctime} = time; |
|
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307 | |
|
|
308 | $self->gendiff($self->{idx}, \@idx); |
|
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309 | |
| 239 | $self->{fsize} = $fsize; |
310 | $self->{fsize} = $fsize; |
| 240 | $self->{mtime} = $mtime; |
311 | $self->{mtime} = $mtime; |
| 241 | $self->{ctime} = time; |
|
|
| 242 | $self->{idx} = \@idx; |
312 | $self->{idx} = \@idx; |
| 243 | |
313 | |
| 244 | my ($add, $del) = gendiff $self->{idx}, \@idx; |
|
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| 245 | push @{$self->{diff}}, [ |
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| 246 | $self->{ctime}, |
|
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| 247 | $add, $del, |
|
|
| 248 | ] if @$add || @$del; |
|
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| 249 | |
|
|
| 250 | $self->dirty; |
314 | $self->dirty; |
|
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315 | $self->write_mdif;#d# |
|
|
316 | } |
| 251 | |
317 | |
| 252 | return 2; |
318 | sub inventory { |
| 253 | } else { |
319 | hash sort map { $_->[1] } @{$_[0]{idx}}; |
| 254 | slog 2, "$path: no longer exists\n"; |
320 | } |
| 255 | unlink $conf; |
|
|
| 256 | |
321 | |
| 257 | return (); |
322 | sub iidx { |
|
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323 | my $self = shift; |
|
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324 | |
|
|
325 | $self->{iidx} ||= do { |
|
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326 | my %iidx; |
|
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327 | my $idx = $self->{idx}; |
|
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328 | |
|
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329 | push @$idx, [$self->{fsize}]; |
|
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330 | my $ofs = 0; |
|
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331 | for (0 .. @$idx - 2) { |
|
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332 | $iidx{$idx->[$_][1]} = [$idx->[$_][0], $idx->[$_+1][0] - $idx->[$_][0]]; |
|
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333 | } |
|
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334 | pop @$idx, [$self->{fsize}]; |
|
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335 | |
|
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336 | \%iidx; |
| 258 | } |
337 | }; |
|
|
338 | } |
|
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339 | |
|
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340 | sub exists { |
|
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341 | $_[0]->iidx unless $_[0]{iidx}; |
|
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342 | return $_[0]{iidx}{$_[1]}; |
|
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343 | } |
|
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344 | |
|
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345 | sub fetch { |
|
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346 | my ($self, $hash) = @_; |
|
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347 | |
|
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348 | $self->iidx unless $self->{iidx}; |
|
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349 | |
|
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350 | my $mail; |
|
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351 | |
|
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352 | my $msg = $self->{iidx}{$hash} |
|
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353 | or die "$hash: no such message in $self->{path}"; |
|
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354 | |
|
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355 | print STDERR "$self->{fh}, $msg->[0], SEEK_SET\n";#d# |
|
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356 | |
|
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357 | seek $self->{fh}, $msg->[0], SEEK_SET |
|
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358 | or die "$self->{path}: $!"; |
|
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359 | |
|
|
360 | print STDERR "$msg->[1] == read $self->{fh}, $msg->[1]\n";#d# |
|
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361 | |
|
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362 | $msg->[1] == read $self->{fh}, $mail, $msg->[1] |
|
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363 | or die "$self->{path}: $!"; |
|
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364 | |
|
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365 | $mail =~ /^From \S/ |
|
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366 | or die "$self->{path}: mail folder corrupted"; |
|
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367 | |
|
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368 | $mail; |
|
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369 | } |
|
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370 | |
|
|
371 | # begin updating folder |
|
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372 | sub begin_update { |
|
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373 | my $self = shift; |
|
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374 | |
|
|
375 | $self->{oidx} = $self->{idx}; |
|
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376 | } |
|
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377 | |
|
|
378 | sub delete { |
|
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379 | my $self = shift; |
|
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380 | my $temp = "$self->{path}~"; |
|
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381 | |
|
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382 | $self->iidx unless $self->{iidx}; |
|
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383 | |
|
|
384 | for (@_) { |
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385 | if (exists $self->{iidx}{$_}) { # at least one message exists |
|
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386 | my $guard = $::lockdisk->guard; |
|
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387 | my %del; @del{@_} = (); |
|
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388 | my @nidx; |
|
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389 | my $dofs = 0; |
|
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390 | |
|
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391 | open my $fh, "+>", $temp |
|
|
392 | or die "$temp: $!"; |
|
|
393 | |
|
|
394 | eval { |
|
|
395 | 0 == setlkw(fileno $fh, 2) |
|
|
396 | or die "$self->{path}~: $!"; |
|
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397 | |
|
|
398 | $self->{fsize} = 0; # we virtually truncated the file |
|
|
399 | |
|
|
400 | for (@{delete $self->{idx}}) { |
|
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401 | my $hash = $_->[1]; |
|
|
402 | my $buf; |
|
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403 | |
|
|
404 | unless (exists $del{$hash}) { |
|
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405 | my ($ofs, $len) = @{$self->{iidx}{$hash}}; |
|
|
406 | |
|
|
407 | $len or die; |
|
|
408 | |
|
|
409 | seek $self->{fh}, $ofs, SEEK_SET |
|
|
410 | or die "$self->{path}: $!"; |
|
|
411 | |
|
|
412 | $len == read $self->{fh}, $buf, $len |
|
|
413 | or die "$self->{path}: $!"; |
|
|
414 | |
|
|
415 | $buf =~ /^From \S/ |
|
|
416 | or die "$self->{path}: corrupted mail folder"; |
|
|
417 | |
|
|
418 | print $fh $buf |
|
|
419 | or die "$self->{path}: $!"; |
|
|
420 | |
|
|
421 | push @nidx, [$dofs, $hash]; |
|
|
422 | $self->{iidx}{$hash}[0] = $dofs; |
|
|
423 | $dofs += $len; |
|
|
424 | |
|
|
425 | &::give unless ++$ecnt & 255; |
|
|
426 | } else { |
|
|
427 | delete $self->{iidx}{$hash}; |
|
|
428 | slog 0, "skipping/deleting $hash\n"; |
|
|
429 | } |
|
|
430 | } |
|
|
431 | }; |
|
|
432 | |
|
|
433 | if ($@) { |
|
|
434 | close $fh; |
|
|
435 | unlink $temp; |
|
|
436 | die; |
|
|
437 | } |
|
|
438 | |
|
|
439 | fflush($fh); |
|
|
440 | 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 | $self->{fsize} = $dofs; |
|
|
450 | |
|
|
451 | return; |
|
|
452 | } |
|
|
453 | } |
|
|
454 | } |
|
|
455 | |
|
|
456 | sub append { |
|
|
457 | my ($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}: $!"; |
|
|
464 | |
|
|
465 | print {$self->{fh}} $mail |
|
|
466 | or die "$self->{path}: $!"; |
|
|
467 | |
|
|
468 | push @{$self->{idx}}, [$self->{fsize}, $hash]; |
|
|
469 | $self->{fsize} += length $mail; |
|
|
470 | } |
|
|
471 | } |
|
|
472 | |
|
|
473 | sub end_update { |
|
|
474 | my $self = shift; |
|
|
475 | |
|
|
476 | $self->gendiff((delete $self->{oidx}), $self->{idx}); |
|
|
477 | |
|
|
478 | fflush($self->{fh}); |
|
|
479 | File::Sync::fsync($self->{fh}); |
|
|
480 | |
|
|
481 | stat $self->{fh} |
|
|
482 | or die "$self->{path}: $!"; |
|
|
483 | |
|
|
484 | $self->{fsize} = (stat _)[7]; |
|
|
485 | $self->{mtime} = (stat _)[9]; |
|
|
486 | |
|
|
487 | $self->dirty; |
| 259 | } |
488 | } |
| 260 | |
489 | |
| 261 | 1; |
490 | 1; |
| 262 | |
491 | |
|
|
492 | __DATA__ |
|
|
493 | __C__ |
|
|
494 | #include <unistd.h> |
|
|
495 | #include <fcntl.h> |
|
|
496 | |
|
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497 | /* mode0 unlock, mode1 rlock, mode2 rwlock */ |
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498 | int setlkw(int fd, int mode) |
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499 | { |
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500 | struct flock l; |
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501 | |
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502 | l.l_type = mode == 0 ? F_UNLCK |
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503 | : mode == 1 ? F_RDLCK |
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504 | : F_WRLCK; |
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505 | l.l_whence = SEEK_SET; |
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506 | l.l_start = 0; |
|
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507 | l.l_len = 0; |
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508 | |
|
|
509 | return fcntl (fd, F_SETLKW, &l); |
|
|
510 | } |
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|
511 | |
