����JFIFXX�����    $.' ",#(7),01444'9=82<.342  2!!22222222222222222222222222222222222222222222222222����"��4�� ���,�PG"Z_�4�˷����kjز�Z�,F+��_z�,�© �����zh6�٨�ic�fu���#ډb���_�N�?��wQ���5-�~�I���8����TK<5o�Iv-�����k�_U_�����~b�M��d����Ӝ�U�Hh��?]��E�w��Q���k�{��_}qFW7HTՑ��Y��F�?_�'ϔ��_�Ջt��=||I ��6�έ"�����D���/[�k�9���Y�8ds|\���Ҿp6�Ҵ���]��.����6�z<�v��@]�i%��$j��~�g��J>��no����pM[me�i$[����s�o�ᘨ�˸ nɜG-�ĨU�ycP�3.DB�li�;��hj���x7Z^�N�h������N3u{�:j�x�힞��#M&��jL P@_���� P��&��o8������9�����@Sz6�t7#O�ߋ �s}Yf�T���lmr����Z)'N��k�۞p����w\�Tȯ?�8`�O��i{wﭹW�[�r�� ��Q4F�׊���3m&L�=��h3����z~��#�\�l :�F,j@�� ʱ�wQT����8�"kJO���6�֚l����}���R�>ډK���]��y����&����p�}b��;N�1�m�r$�|��7�>e�@B�TM*-iH��g�D�)� E�m�|�ؘbҗ�a��Ҿ����t4���o���G��*oCN�rP���Q��@z,|?W[0�����:�n,jWiE��W��$~/�hp\��?��{(�0���+�Y8rΟ�+����>S-S����VN;�}�s?.����� w�9��˟<���Mq4�Wv'��{)0�1mB��V����W[�����8�/<� �%���wT^�5���b��)iM� pg�N�&ݝ��VO~�q���u���9� ����!��J27����$O-���! �:�%H��� ـ����y�ΠM=t{!S�� oK8������t<����è:a������[�����ա�H���~��w��Qz`�po�^ ����Q��n� �,uu�C�$ ^���,������8�#��:�6��e�|~���!�3�3.�\0��q��o�4`.|� ����y�Q�`~;�d�ׯ,��O�Zw�������`73�v�܋�<���Ȏ�� ـ4k��5�K�a�u�=9Yd��$>x�A�&�� j0� ���vF��� Y�|�y��� ~�6�@c��1vOp�Ig����4��l�OD���L����� R���c���j�_�uX6��3?nk��Wy�f;^*B� ��@�~a�`��Eu������+���6�L��.ü>��}y���}_�O�6�͐�:�YrG�X��kG�����l^w���~㒶sy��Iu�!� W ��X��N�7BV��O��!X�2����wvG�R�f�T#�����t�/?���%8�^�W�aT��G�cL�M���I��(J����1~�8�?aT ���]����AS�E��(��*E}� 2��#I/�׍qz��^t�̔���b�Yz4x���t�){ OH��+(E��A&�N�������XT��o��"�XC��'���)}�J�z�p� ��~5�}�^����+�6����w��c��Q�|Lp�d�H��}�(�.|����k��c4^�"�����Z?ȕ ��a<�L�!039C� �Eu�C�F�Ew�ç ;�n?�*o���B�8�bʝ���'#Rqf���M}7����]����s2tcS{�\icTx;�\��7K���P���ʇ Z O-��~��c>"��?�������P��E��O�8��@�8��G��Q�g�a�Վ���󁶠�䧘��_%#r�>�1�z�a��eb��qcPѵ��n���#L��� =��׀t� L�7�`��V���A{�C:�g���e@�w1 Xp3�c3�ġ����p��M"'-�@n4���fG��B3�DJ�8[Jo�ߐ���gK)ƛ��$���� ���8�3�����+���� �����6�ʻ���� ���S�kI�*KZlT _`���?��K����QK�d����B`�s}�>���`��*�>��,*@J�d�oF*����弝��O}�k��s��]��y�ߘ��c1G�V���<=�7��7����6�q�PT��tXԀ�!9*4�4Tހ3XΛex�46���Y��D ����� �BdemDa����\�_l,��G�/���֌7���Y�](�xTt^%�GE�����4�}bT���ڹ�����;Y)���B�Q��u��>J/J �⮶.�XԄ��j�ݳ�+E��d ��r�5�_D�1 ��o�� �B�x�΢�#���<��W�����8���R6�@g�M�.��� dr�D��>(otU��@x=��~v���2� ӣ�d�oBd��3�eO�6�㣷�����ݜ6��6Y��Qz`��S��{���\P�~z m5{J/L��1������<�e�ͅPu�b�]�ϔ���'������f�b� Zpw��c`"��i���BD@:)ִ�:�]��hv�E�w���T�l��P���"Ju�}��وV J��G6��. J/�Qgl߭�e�����@�z�Zev2u�)]կ�����7x���s�M�-<ɯ�c��r�v�����@��$�ޮ}lk���a���'����>x��O\�ZFu>�����ck#��&:��`�$�ai�>2Δ����l���oF[h��lE�ܺ�Πk:)���`�� $[6�����9�����kOw�\|���8}������ބ:��񶐕��I�A1/�=�2[�,�!��.}gN#�u����b��� ~��݊��}34q����d�E��Lc��$��"�[q�U�硬g^��%B �z���r�pJ�ru%v\h1Y�ne`ǥ:g���pQM~�^�Xi� ��`S�:V29.�P���V�?B�k�� AEvw%�_�9C�Q����wKekPؠ�\�;Io d�{ ߞo�c1eP����\� `����E=���@K<�Y���eڼ�J���w����{av�F�'�M�@/J��+9p���|]�����Iw &`��8���&M�hg��[�{��Xj��%��Ӓ�$��(����ʹN���<>�I���RY���K2�NPlL�ɀ)��&e����B+ь����( � �JTx���_?EZ� }@ 6�U���뙢ط�z��dWI�n` D����噥�[��uV��"�G&Ú����2g�}&m��?ċ�"����Om#��������� ��{�ON��"S�X��Ne��ysQ���@Fn��Vg���dX�~nj�]J�<�K]:��FW��b�������62�=��5f����JKw��bf�X�55��~J �%^����:�-�QIE��P��v�nZum� z � ~ə ���� ���ة����;�f��\v���g�8�1��f24;�V���ǔ�)����9���1\��c��v�/'Ƞ�w�������$�4�R-��t���� e�6�/�ġ �̕Ecy�J���u�B���<�W�ַ~�w[B1L۲�-JS΂�{���΃������A��20�c#��@ 0!1@AP"#2Q`$3V�%45a6�FRUq��� ����^7ׅ,$n�������+��F�`��2X'��0vM��p�L=������5��8������u�p~���.�`r�����\���O��,ư�0oS ��_�M�����l���4�kv\JSd���x���SW�<��Ae�IX����������$I���w�:S���y���›R��9�Q[���,�5�;�@]�%���u�@ *ro�lbI �� ��+���%m:�͇ZV�����u�̉����θau<�fc�.����{�4Ա� �Q����*�Sm��8\ujqs]{kN���)qO�y�_*dJ�b�7���yQqI&9�ԌK!�M}�R�;������S�T���1���i[U�ɵz�]��U)V�S6���3$K{�ߊ<�(� E]Զ[ǼENg�����'�\?#)Dkf��J���o��v���'�%ƞ�&K�u�!��b�35LX�Ϸ��63$K�a�;�9>,R��W��3�3� d�JeTYE.Mϧ��-�o�j3+y��y^�c�������VO�9NV\nd�1 ��!͕_)a�v;����թ�M�lWR1��)El��P;��yوÏ�u 3�k�5Pr6<�⒲l�!˞*��u־�n�!�l:����UNW ��%��Chx8vL'��X�@��*��)���̮��ˍ��� ���D-M�+J�U�kvK����+�x8��cY������?�Ԡ��~3mo��|�u@[XeY�C�\Kp�x8�oC�C�&����N�~3-H���� ��MX�s�u<`���~"WL��$8ξ��3���a�)|:@�m�\���^�`�@ҷ)�5p+��6���p�%i)P M���ngc�����#0Aruz���RL+xSS?���ʮ}()#�t��mˇ!��0}}y����<�e� �-ή�Ԩ��X������ MF���ԙ~l L.3���}�V뽺�v�����멬��Nl�)�2����^�Iq��a��M��qG��T�����c3#������3U�Ǎ���}��לS�|qa��ڃ�+���-��2�f����/��bz��ڐ�� �ݼ[2�ç����k�X�2�* �Z�d���J�G����M*9W���s{��w���T��x��y,�in�O�v��]���n����P�$�JB@=4�OTI�n��e�22a\����q�d���%�$��(���:���: /*�K[PR�fr\nڙdN���F�n�$�4�[�� U�zƶ����� �mʋ���,�ao�u 3�z� �x��Kn����\[��VFmbE;�_U��&V�Gg�]L�۪&#n%�$ɯ�dG���D�TI=�%+AB�Ru#��b4�1�»x�cs�YzڙJG��f��Il��d�eF'T� iA��T���uC�$����Y��H?����[!G`}���ͪ� �纤Hv\������j�Ex�K���!���OiƸ�Yj�+u-<���'q����uN�*�r\��+�]���<�wOZ.fp�ێ��,-*)V?j-kÊ#�`�r��dV����(�ݽBk�����G�ƛk�QmUڗe��Z���f}|����8�8��a���i��3'J�����~G_�^���d�8w������ R�`(�~�.��u���l�s+g�bv���W���lGc}��u���afE~1�Ue������Z�0�8�=e�� f@/�jqEKQQ�J��oN��J���W5~M>$6�Lt�;$ʳ{���^��6�{����v6���ķܰg�V�cnn �~z�x�«�,2�u�?cE+Ș�H؎�%�Za�)���X>uW�Tz�Nyo����s���FQƤ��$��*�&�LLXL)�1�" L��eO��ɟ�9=���:t��Z���c��Ž���Y?�ӭV�wv�~,Y��r�ۗ�|�y��GaF�����C�����.�+� ���v1���fήJ�����]�S��T��B��n5sW}y�$��~z�'�c ��8 ��� ,! �p��VN�S��N�N�q��y8z˱�A��4��*��'������2n<�s���^ǧ˭P�Jޮɏ�U�G�L�J�*#��<�V��t7�8����TĜ>��i}K%,���)[��z�21z ?�N�i�n1?T�I�R#��m-�����������������1����lA�`��fT5+��ܐ�c�q՝��ʐ��,���3�f2U�եmab��#ŠdQ�y>\��)�SLY����w#��.���ʑ�f��� ,"+�w�~�N�'�c�O�3F�������N<���)j��&��,-� �љ���֊�_�zS���TǦ����w�>��?�������n��U仆�V���e�����0���$�C�d���rP �m�׈e�Xm�Vu� �L��.�bֹ��� �[Դaզ���*��\y�8�Է:�Ez\�0�Kq�C b��̘��cө���Q��=0Y��s�N��S.���3.���O�o:���#���v7�[#߫ ��5�܎�L���Er4���9n��COWlG�^��0k�%<���ZB���aB_���������'=��{i�v�l�$�uC���mƎҝ{�c㱼�y]���W�i ��ߧc��m�H� m�"�"�����;Y�ߝ�Z�Ǔ�����:S#��|}�y�,/k�Ld� TA�(�AI$+I3��;Y*���Z��}|��ӧO��d�v��..#:n��f>�>���ȶI�TX��� 8��y����"d�R�|�)0���=���n4��6ⲑ�+��r<�O�܂~zh�z����7ܓ�HH�Ga롏���nCo�>������a ���~]���R���̲c?�6(�q�;5%� |�uj�~z8R=X��I�V=�|{v�Gj\gc��q����z�؋%M�ߍ����1y��#��@f^���^�>N�����#x#۹��6�Y~�?�dfPO��{��P�4��V��u1E1J �*|���%���JN��`eWu�zk M6���q t[�� ��g�G���v��WIG��u_ft����5�j�"�Y�:T��ɐ���*�;� e5���4����q$C��2d�}���� _S�L#m�Yp��O�.�C�;��c����Hi#֩%+) �Ӎ��ƲV���SYź��g |���tj��3�8���r|���V��1#;.SQ�A[���S������#���`n�+���$��$I �P\[�@�s��(�ED�z���P��])8�G#��0B��[ى��X�II�q<��9�~[Z멜�Z�⊔IWU&A>�P~�#��dp<�?����7���c��'~���5 ��+$���lx@�M�dm��n<=e�dyX��?{�|Aef ,|n3�<~z�ƃ�uۧ�����P��Y,�ӥQ�*g�#먙R�\���;T��i,��[9Qi歉����c>]9�� ��"�c��P�� �Md?٥��If�ت�u��k��/����F��9�c*9��Ǎ:�ØF���z�n*�@|I�ށ9����N3{'��[�'ͬ�Ҳ4��#}��!�V� Fu��,�,mTIk���v C�7v���B�6k�T9��1�*l� '~��ƞF��lU��'�M ����][ΩũJ_�{�i�I�n��$���L�� j��O�dx�����kza۪��#�E��Cl����x˘�o�����V���ɞ�ljr��)�/,�߬h�L��#��^��L�ф�,íMƁe�̩�NB�L�����iL����q�}��(��q��6IçJ$�W�E$��:������=#����(�K�B����zђ <��K(�N�۫K�w��^O{!����)�H���>x�������lx�?>Պ�+�>�W���,Ly!_�D���Ō�l���Q�!�[ �S����J��1��Ɛ�Y}��b,+�Lo�x�ɓ)����=�y�oh�@�꥟/��I��ѭ=��P�y9��� �ۍYӘ�e+�p�Jnϱ?V\SO%�(�t� ���=?MR�[Ș�����d�/ ��n�l��B�7j� ��!�;ӥ�/�[-���A�>�dN�sLj ��,ɪv��=1c�.SQ�O3�U���ƀ�ܽ�E����������̻��9G�ϷD�7(�}��Ävӌ\�y�_0[w ���<΍>����a_��[0+�L��F.�޺��f�>oN�T����q;���y\��bՃ��y�jH�<|q-eɏ�_?_9+P���Hp$�����[ux�K w�Mw��N�ی'$Y2�=��q���KB��P��~������Yul:�[<����F1�2�O���5=d����]Y�sw:���Ϯ���E��j,_Q��X��z`H1,#II ��d�wr��P˂@�ZJV����y$�\y�{}��^~���[:N����ߌ�U�������O��d�����ؾe��${p>G��3c���Ė�lʌ�� ת��[��`ϱ�-W����dg�I��ig2��� ��}s ��ؤ(%#sS@���~���3�X�nRG�~\jc3�v��ӍL��M[JB�T��s3}��j�Nʖ��W����;7��ç?=X�F=-�=����q�ߚ���#���='�c��7���ڑW�I(O+=:uxq�������������e2�zi+�kuG�R��������0�&e�n���iT^J����~\jy���p'dtG��s����O��3����9* �b#Ɋ�� p������[Bws�T�>d4�ۧs���nv�n���U���_�~,�v����ƜJ1��s�� �QIz��)�(lv8M���U=�;����56��G���s#�K���MP�=��LvyGd��}�VwWBF�'�à �?MH�U�g2�� ����!�p�7Q��j��ڴ����=��j�u��� Jn�A s���uM������e��Ɔ�Ҕ�!)'��8Ϣ�ٔ��ޝ(��Vp���צ֖d=�IC�J�Ǡ{q������kԭ�߸���i��@K����u�|�p=..�*+����x�����z[Aqġ#s2a�Ɗ���RR�)*HRsi�~�a &f��M��P����-K�L@��Z��Xy�'x�{}��Zm+���:�)�) IJ�-i�u���� ���ܒH��'�L(7�y�GӜq���� j��� 6ߌg1�g�o���,kر���tY�?W,���p���e���f�OQS��!K�۟cҒA�|ս�j�>��=⬒��˧L[�� �߿2JaB~R��u�:��Q�] �0H~���]�7��Ƽ�I���(}��cq '�ήET���q�?f�ab���ӥvr� �)o��-Q��_'����ᴎo��K������;��V���o��%���~OK ����*��b�f:���-ťIR��`B�5!RB@���ï�� �u �̯e\�_U�_������� g�ES��3�������QT��a����x����U<~�c?�*�#]�MW,[8O�a�x��]�1bC|踤�P��lw5V%�)�{t�<��d��5���0i�XSU��m:��Z�┵�i�"��1�^B�-��P�hJ��&)O��*�D��c�W��vM��)����}���P��ܗ-q����\mmζZ-l@�}��a��E�6��F�@��&Sg@���ݚ�M����� ȹ 4����#p�\H����dYDo�H���"��\��..R�B�H�z_�/5˘����6��KhJR��P�mƶi�m���3�,#c�co��q�a)*Pt����R�m�k�7x�D�E�\Y�閣_X�<���~�)���c[[�BP����6�Yq���S��0����%_����;��Àv�~�| VS؇ ��'O0��F0��\���U�-�d@�����7�SJ*z��3n��y��P����O���������m�~�P�3|Y��ʉr#�C�<�G~�.,! ���bqx���h~0=��!ǫ�jy����l�O,�[B��~��|9��ٱ����Xly�#�i�B��g%�S��������tˋ���e���ې��\[d�t)��.+u�|1 ������#�~Oj����hS�%��i.�~X���I�H�m��0n���c�1uE�q��cF�RF�o���7� �O�ꮧ� ���ۛ{��ʛi5�rw?׌#Qn�TW��~?y$��m\�\o����%W� ?=>S�N@�� �Ʈ���R����N�)�r"C�:��:����� �����#��qb��Y�. �6[��2K����2u�Ǧ�HYR��Q�MV��� �G�$��Q+.>�����nNH��q�^��� ����q��mM��V��D�+�-�#*�U�̒ ���p욳��u:�������IB���m���PV@O���r[b= �� ��1U�E��_Nm�yKbN�O���U�}�the�`�|6֮P>�\2�P�V���I�D�i�P�O;�9�r�mAHG�W�S]��J*�_�G��+kP�2����Ka�Z���H�'K�x�W�MZ%�O�YD�Rc+o��?�q��Ghm��d�S�oh�\�D�|:W������UA�Qc yT�q������~^�H��/��#p�CZ���T�I�1�ӏT����4��"�ČZ�����}��`w�#�*,ʹ�� ��0�i��課�Om�*�da��^gJ݅{���l�e9uF#T�ֲ��̲�ٞC"�q���ߍ ոޑ�o#�XZTp����@ o�8��(jd��xw�]�,f���`~�|,s��^����f�1���t��|��m�򸄭/ctr��5s��7�9Q�4�H1꠲BB@l9@���C�����+�wp�xu�£Yc�9��?`@#�o�mH�s2��)�=��2�.�l����jg�9$�Y�S�%*L������R�Y������7Z���,*=�䷘$�������arm�o�ϰ���UW.|�r�uf����IGw�t����Zwo��~5 ��YյhO+=8fF�)�W�7�L9lM�̘·Y���֘YLf�큹�pRF���99.A �"wz��=E\Z���'a� 2��Ǚ�#;�'}�G���*��l��^"q��+2FQ� hj��kŦ��${���ޮ-�T�٭cf�|�3#~�RJ����t��$b�(R��(����r���dx� >U b�&9,>���%E\� Ά�e�$��'�q't��*�א���ެ�b��-|d���SB�O�O��$�R+�H�)�܎�K��1m`;�J�2�Y~9��O�g8=vqD`K[�F)k�[���1m޼c��n���]s�k�z$@��)!I �x՝"v��9=�ZA=`Ɠi �:�E��)`7��vI��}d�YI�_ �o�:ob���o ���3Q��&D&�2=�� �Ά��;>�h����y.*ⅥS������Ӭ�+q&����j|UƧ����}���J0��WW< ۋS�)jQR�j���Ư��rN)�Gű�4Ѷ(�S)Ǣ�8��i��W52���No˓� ۍ%�5brOn�L�;�n��\G����=�^U�dI���8$�&���h��'���+�(������cȁ߫k�l��S^���cƗjԌE�ꭔ��gF���Ȓ��@���}O���*;e�v�WV���YJ\�]X'5��ղ�k�F��b 6R�o՜m��i N�i����>J����?��lPm�U��}>_Z&�KK��q�r��I�D�Չ~�q�3fL�:S�e>���E���-G���{L�6p�e,8��������QI��h��a�Xa��U�A'���ʂ���s�+טIjP�-��y�8ۈZ?J$��W�P� ��R�s�]��|�l(�ԓ��sƊi��o(��S0��Y� 8�T97.�����WiL��c�~�dxc�E|�2!�X�K�Ƙਫ਼�$((�6�~|d9u+�qd�^3�89��Y�6L�.I�����?���iI�q���9�)O/뚅����O���X��X�V��ZF[�یgQ�L��K1���RҖr@v�#��X�l��F���Нy�S�8�7�kF!A��sM���^rkp�jP�DyS$N���q��nxҍ!U�f�!eh�i�2�m���`�Y�I�9r�6� �TF���C}/�y�^���Η���5d�'��9A-��J��>{�_l+�`��A���[�'��յ�ϛ#w:݅�%��X�}�&�PSt�Q�"�-��\縵�/����$Ɨh�Xb�*�y��BS����;W�ջ_mc�����vt?2}1�;qS�d�d~u:2k5�2�R�~�z+|HE!)�Ǟl��7`��0�<�,�2*���Hl-��x�^����'_TV�gZA�'j� ^�2Ϊ��N7t�����?w�� �x1��f��Iz�C-Ȗ��K�^q�;���-W�DvT�7��8�Z�������� hK�(P:��Q- �8�n�Z���܃e貾�<�1�YT<�,�����"�6{/ �?�͟��|1�:�#g��W�>$����d��J��d�B��=��jf[��%rE^��il:��B���x���Sּ�1հ��,�=��*�7 fcG��#q� �eh?��2�7�����,�!7x��6�n�LC�4x��},Geǝ�tC.��vS �F�43��zz\��;QYC,6����~;RYS/6���|2���5���v��T��i����������mlv��������&� �nRh^ejR�LG�f���? �ۉҬܦƩ��|��Ȱ����>3����!v��i�ʯ�>�v��オ�X3e���_1z�Kȗ\<������!�8���V��]��?b�k41�Re��T�q��mz��TiOʦ�Z��Xq���L������q"+���2ۨ��8}�&N7XU7Ap�d�X��~�׿��&4e�o�F��� �H����O���č�c�� 懴�6���͉��+)��v;j��ݷ�� �UV�� i��� j���Y9GdÒJ1��詞�����V?h��l����l�cGs�ځ�������y�Ac�����\V3�? �� ܙg�>qH�S,�E�W�[�㺨�uch�⍸�O�}���a��>�q�6�n6����N6�q������N ! 1AQaq�0@����"2BRb�#Pr���3C`��Scst���$4D���%Td�� ?���N����a��3��m���C���w��������xA�m�q�m���m������$����4n淿t'��C"w��zU=D�\R+w�p+Y�T�&�պ@��ƃ��3ޯ?�Aﶂ��aŘ���@-�����Q�=���9D��ռ�ѻ@��M�V��P��܅�G5�f�Y<�u=,EC)�<�Fy'�"�&�չ�X~f��l�KԆV��?�� �W�N����=(� �;���{�r����ٌ�Y���h{�١������jW����P���Tc�����X�K�r��}���w�R��%��?���E��m�� �Y�q|����\lEE4���r���}�lsI�Y������f�$�=�d�yO����p�����yBj8jU�o�/�S��?�U��*������ˍ�0������u�q�m [�?f����a�� )Q�>����6#������� ?����0UQ����,IX���(6ڵ[�DI�MNލ�c&���υ�j\��X�R|,4��� j������T�hA�e��^���d���b<����n�� �즇�=!���3�^�`j�h�ȓr��jẕ�c�,ٞX����-����a�ﶔ���#�$��]w�O��Ӫ�1y%��L�Y<�wg#�ǝ�̗`�x�xa�t�w��»1���o7o5��>�m뭛C���Uƃߜ}�C���y1Xνm�F8�jI���]����H���ۺиE@I�i;r�8ӭ����V�F�Շ| ��&?�3|x�B�MuS�Ge�=Ӕ�#BE5G�����Y!z��_e��q�р/W>|-�Ci߇�t�1ޯќd�R3�u��g�=0 5��[?�#͏��q�cf���H��{ ?u�=?�?ǯ���}Z��z���hmΔ�BFTW�����<�q�(v� ��!��z���iW]*�J�V�z��gX֧A�q�&��/w���u�gYӘa���; �i=����g:��?2�dž6�ى�k�4�>�Pxs����}������G�9��3 ���)gG�R<>r h�$��'nc�h�P��Bj��J�ҧH� -��N1���N��?��~��}-q!=��_2hc�M��l�vY%UE�@|�v����M2�.Y[|y�"Eï��K�ZF,�ɯ?,q�?v�M 80jx�"�;�9vk�����+ ֧�� �ȺU��?�%�vcV��mA�6��Qg^M����A}�3�nl� QRN�l8�kkn�'�����(��M�7m9و�q���%ޟ���*h$Zk"��$�9��: �?U8�Sl��,,|ɒ��xH(ѷ����Gn�/Q�4�P��G�%��Ա8�N��!� �&�7�;���eKM7�4��9R/%����l�c>�x;������>��C�:�����t��h?aKX�bhe�ᜋ^�$�Iհ �hr7%F$�E��Fd���t��5���+�(M6�t����Ü�UU|zW�=a�Ts�Tg������dqP�Q����b'�m���1{|Y����X�N��b �P~��F^F:����k6�"�j!�� �I�r�`��1&�-$�Bevk:y���#yw��I0��x��=D�4��tU���P�ZH��ڠ底taP��6����b>�xa����Q�#� WeF��ŮNj�p�J* mQ�N����*I�-*�ȩ�F�g�3 �5��V�ʊ�ɮ�a��5F���O@{���NX��?����H�]3��1�Ri_u��������ѕ�� ����0��� F��~��:60�p�͈�S��qX#a�5>���`�o&+�<2�D����: �������ڝ�$�nP���*)�N�|y�Ej�F�5ټ�e���ihy�Z �>���k�bH�a�v��h�-#���!�Po=@k̆IEN��@��}Ll?j�O������߭�ʞ���Q|A07x���wt!xf���I2?Z��<ץ�T���cU�j��]��陎Ltl �}5�ϓ��$�,��O�mˊ�;�@O��jE��j(�ا,��LX���LO���Ц�90�O �.����a��nA���7������j4 ��W��_ٓ���zW�jcB������y՗+EM�)d���N�g6�y1_x��p�$Lv:��9�"z��p���ʙ$��^��JԼ*�ϭ����o���=x�Lj�6�J��u82�A�H�3$�ٕ@�=Vv�]�'�qEz�;I˼��)��=��ɯ���x �/�W(V���p�����$ �m�������u�����񶤑Oqˎ�T����r��㠚x�sr�GC��byp�G��1ߠ�w e�8�$⿄����/�M{*}��W�]˷.�CK\�ުx���/$�WPw���r� |i���&�}�{�X� �>��$-��l���?-z���g����lΆ���(F���h�vS*���b���߲ڡn,|)mrH[���a�3�ר�[1��3o_�U�3�TC�$��(�=�)0�kgP���� ��u�^=��4 �WYCҸ:��vQ�ר�X�à��tk�m,�t*��^�,�}D*� �"(�I��9R����>`�`��[~Q]�#af��i6l��8���6�:,s�s�N6�j"�A4���IuQ��6E,�GnH��zS�HO�uk�5$�I�4��ؤ�Q9�@��C����wp�BGv[]�u�Ov���0I4���\��y�����Q�Ѹ��~>Z��8�T��a��q�ޣ;z��a���/��S��I:�ܫ_�|������>=Z����8:�S��U�I�J��"IY���8%b8���H��:�QO�6�;7�I�S��J��ҌAά3��>c���E+&jf$eC+�z�;��V����� �r���ʺ������my�e���aQ�f&��6�ND��.:��NT�vm�<- u���ǝ\MvZY�N�NT��-A�>jr!S��n�O 1�3�Ns�%�3D@���`������ܟ 1�^c<���� �a�ɽ�̲�Xë#�w�|y�cW�=�9I*H8�p�^(4���՗�k��arOcW�tO�\�ƍR��8����'�K���I�Q�����?5�>[�}��yU�ײ -h��=��% q�ThG�2�)���"ו3]�!kB��*p�FDl�A���,�eEi�H�f�Ps�����5�H:�Փ~�H�0Dت�D�I����h�F3�������c��2���E��9�H��5�zԑ�ʚ�i�X�=:m�xg�hd(�v����׊�9iS��O��d@0ڽ���:�p�5�h-��t�&���X�q�ӕ,��ie�|���7A�2���O%P��E��htj��Y1��w�Ѓ!����  ���� ࢽ��My�7�\�a�@�ţ�J �4�Ȼ�F�@o�̒?4�wx��)��]�P��~�����u�����5�����7X ��9��^ܩ�U;Iꭆ 5 �������eK2�7(�{|��Y׎ �V��\"���Z�1� Z�����}��(�Ǝ"�1S���_�vE30>���p;� ΝD��%x�W�?W?v����o�^V�i�d��r[��/&>�~`�9Wh��y�;���R��� ;;ɮT��?����r$�g1�K����A��C��c��K��l:�'��3 c�ﳯ*"t8�~l��)���m��+U,z��`(�>yJ�?����h>��]��v��ЍG*�{`��;y]��I�T� ;c��NU�fo¾h���/$���|NS���1�S�"�H��V���T���4��uhǜ�]�v;���5�͠x��'C\�SBpl���h}�N����� A�Bx���%��ޭ�l��/����T��w�ʽ]D�=����K���ž�r㻠l4�S�O?=�k �M:� ��c�C�a�#ha���)�ѐxc�s���gP�iG��{+���x���Q���I= �� z��ԫ+ �8"�k�ñ�j=|����c ��y��CF��/��*9ж�h{ �?4�o� ��k�m�Q�N�x��;�Y��4膚�a�w?�6�>e]�����Q�r�:����g�,i"�����ԩA�*M�<�G��b�if��l^M��5� �Ҩ�{����6J��ZJ�����P�*�����Y���ݛu�_4�9�I8�7���������,^ToR���m4�H��?�N�S�ѕw��/S��甍�@�9H�S�T��t�ƻ���ʒU��*{Xs�@����f�����֒Li�K{H�w^���������Ϥm�tq���s� ���ք��f:��o~s��g�r��ט� �S�ѱC�e]�x���a��) ���(b-$(�j>�7q�B?ӕ�F��hV25r[7 Y� }L�R��}����*sg+��x�r�2�U=�*'WS��ZDW]�WǞ�<��叓���{�$�9Ou4��y�90-�1�'*D`�c�^o?(�9��u���ݐ��'PI&� f�Jݮ�������:wS����jfP1F:X �H�9dԯ���˝[�_54 �}*;@�ܨ�� ð�yn�T���?�ןd�#���4rG�ͨ��H�1�|-#���Mr�S3��G�3�����)�.᧏3v�z֑��r����$G"�`j �1t��x0<Ɔ�Wh6�y�6��,œ�Ga��gA����y��b��)��h�D��ß�_�m��ü �gG;��e�v��ݝ�nQ� ��C����-�*��o���y�a��M��I�>�<���]obD��"�:���G�A��-\%LT�8���c�)��+y76���o�Q�#*{�(F�⽕�y����=���rW�\p���۩�c���A���^e6��K������ʐ�cVf5$�'->���ՉN"���F�"�UQ@�f��Gb~��#�&�M=��8�ט�JNu9��D��[̤�s�o�~������ G��9T�tW^g5y$b��Y'��س�Ǵ�=��U-2 #�MC�t(�i� �lj�@Q 5�̣i�*�O����s�x�K�f��}\��M{E�V�{�υ��Ƈ�����);�H����I��fe�Lȣr�2��>��W�I�Ȃ6������i��k�� �5�YOxȺ����>��Y�f5'��|��H+��98pj�n�.O�y�������jY��~��i�w'������l�;�s�2��Y��:'lg�ꥴ)o#'Sa�a�K��Z� �m��}�`169�n���"���x��I ��*+� }F<��cГ���F�P�������ֹ*�PqX�x۩��,� ��N�� �4<-����%����:��7����W���u�`����� $�?�I��&����o��o��`v�>��P��"��l���4��5'�Z�gE���8���?��[�X�7(��.Q�-��*���ތL@̲����v��.5���[��=�t\+�CNܛ��,g�SQnH����}*F�G16���&:�t��4ُ"A��̣��$�b �|����#rs��a�����T�� ]�<�j��BS�('$�ɻ� �wP;�/�n��?�ݜ��x�F��yUn�~mL*-�������Xf�wd^�a�}��f�,=t�׵i�.2/wpN�Ep8�OР���•��R�FJ� 55TZ��T �ɭ�<��]��/�0�r�@�f��V��V����Nz�G��^���7hZi����k��3�,kN�e|�vg�1{9]_i��X5y7� 8e]�U����'�-2,���e"����]ot�I��Y_��n�(JҼ��1�O ]bXc���Nu�No��pS���Q_���_�?i�~�x h5d'�(qw52] ��'ޤ�q��o1�R!���`ywy�A4u���h<קy���\[~�4�\ X�Wt/� 6�����n�F�a8��f���z �3$�t(���q��q�x��^�XWeN'p<-v�!�{�(>ӽDP7��ո0�y)�e$ٕv�Ih'Q�EA�m*�H��RI��=:��� ���4牢) �%_iN�ݧ�l]� �Nt���G��H�L��� ɱ�g<���1V�,�J~�ٹ�"K��Q�� 9�HS�9�?@��k����r�;we݁�]I�!{ �@�G�[�"��`���J:�n]�{�cA�E����V��ʆ���#��U9�6����j�#Y�m\��q�e4h�B�7��C�������d<�?J����1g:ٳ���=Y���D�p�ц� ׈ǔ��1�]26؜oS�'��9�V�FVu�P�h�9�xc�oq�X��p�o�5��Ա5$�9W�V(�[Ak�aY錎qf;�'�[�|���b�6�Ck��)��#a#a˙��8���=äh�4��2��C��4tm^ �n'c���]GQ$[Wҿ��i���vN�{Fu ��1�gx��1┷���N�m��{j-,��x�� Ūm�ЧS�[�s���Gna���䑴�� x�p 8<������97�Q���ϴ�v�aϚG��Rt�Һ׈�f^\r��WH�JU�7Z���y)�vg=����n��4�_)y��D'y�6�]�c�5̪�\� �PF�k����&�c;��cq�$~T�7j ���nç]�<�g ":�to�t}�159�<�/�8������m�b�K#g'I'.W�����6��I/��>v��\�MN��g���m�A�yQL�4u�Lj�j9��#44�t��l^�}L����n��R��!��t��±]��r��h6ٍ>�yҏ�N��fU�� ���� Fm@�8}�/u��jb9������he:A�y�ծw��GpΧh�5����l}�3p468��)U��d��c����;Us/�֔�YX�1�O2��uq�s��`hwg�r~�{ R��mhN��؎*q 42�*th��>�#���E����#��Hv�O����q�}�����6�e��\�,Wk�#���X��b>��p}�դ��3���T5��†��6��[��@�P�y*n��|'f�֧>�lư΂�̺����SU�'*�q�p�_S�����M�� '��c�6�����m�� ySʨ;M��r���Ƌ�m�Kxo,���Gm�P��A�G�:��i��w�9�}M(�^�V��$ǒ�ѽ�9���|���� �a����J�SQ�a���r�B;����}���ٻ֢�2�%U���c�#�g���N�a�ݕ�'�v�[�OY'��3L�3�;,p�]@�S��{ls��X�'���c�jw�k'a�.��}�}&�� �dP�*�bK=ɍ!����;3n�gΊU�ߴmt�'*{,=SzfD� A��ko~�G�aoq�_mi}#�m�������P�Xhύ����mxǍ�΂���巿zf��Q���c���|kc�����?���W��Y�$���_Lv����l߶��c���`?����l�j�ݲˏ!V��6����U�Ђ(A���4y)H���p�Z_�x��>���e��R��$�/�`^'3qˏ�-&Q�=?��CFVR �D�fV�9��{�8g�������n�h�(P"��6�[�D���< E�����~0<@�`�G�6����Hг�cc�� �c�K.5��D��d�B���`?�XQ��2��ٿyqo&+�1^� DW�0�ꊩ���G�#��Q�nL3��c���������/��x ��1�1[y�x�პCW��C�c�UĨ80�m�e�4.{�m��u���I=��f�����0QRls9���f���������9���~f�����Ǩ��a�"@�8���ȁ�Q����#c�ic������G��$���G���r/$W�(��W���V�"��m�7�[m�A�m����bo��D� j����۳� l���^�k�h׽����� ��#� iXn�v��eT�k�a�^Y�4�BN��ĕ��0 !01@Q"2AaPq3BR������?���@4�Q�����T3,���㺠�W�[=JK�Ϟ���2�r^7��vc�:�9 �E�ߴ�w�S#d���Ix��u��:��Hp��9E!�� V 2;73|F��9Y���*ʬ�F��D����u&���y؟��^EA��A��(ɩ���^��GV:ݜDy�`��Jr29ܾ�㝉��[���E;Fzx��YG��U�e�Y�C���� ����v-tx����I�sם�Ę�q��Eb�+P\ :>�i�C'�;�����k|z�رn�y]�#ǿb��Q��������w�����(�r|ӹs��[�D��2v-%��@;�8<a���[\o[ϧw��I!��*0�krs)�[�J9^��ʜ��p1)� "��/_>��o��<1����A�E�y^�C��`�x1'ܣn�p��s`l���fQ��):�l����b>�Me�jH^?�kl3(�z:���1ŠK&?Q�~�{�ٺ�h�y���/�[��V�|6��}�KbX����mn[-��7�5q�94�������dm���c^���h� X��5��<�eޘ>G���-�}�دB�ޟ� ��|�rt�M��V+�]�c?�-#ڛ��^ǂ}���Lkr���O��u�>�-D�ry� D?:ޞ�U��ǜ�7�V��?瓮�"�#���r��չģVR;�n���/_� ؉v�ݶe5d�b9��/O��009�G���5n�W����JpA�*�r9�>�1��.[t���s�F���nQ� V 77R�]�ɫ8����_0<՜�IF�u(v��4��F�k�3��E)��N:��yڮe��P�`�1}�$WS��J�SQ�N�j�ٺ��޵�#l���ј(�5=��5�lǏmoW�v-�1����v,W�mn��߀$x�<����v�j(����c]��@#��1������Ǔ���o'��u+����;G�#�޸��v-lη��/(`i⣍Pm^���ԯ̾9Z��F��������n��1��� ��]�[��)�'������:�֪�W��FC����� �B9،!?���]��V��A�Վ�M��b�w��G F>_DȬ0¤�#�QR�[V��kz���m�w�"��9ZG�7'[��=�Q����j8R?�zf�\a�=��O�U����*oB�A�|G���2�54 �p��.w7� �� ��&������ξxGHp� B%��$g�����t�Џ򤵍z���HN�u�Я�-�'4��0��;_��3 !01"@AQa2Pq#3BR������?��ʩca��en��^��8���<�u#��m*08r��y�N"�<�Ѳ0��@\�p��� �����Kv�D��J8�Fҽ� �f�Y��-m�ybX�NP����}�!*8t(�OqѢ��Q�wW�K��ZD��Δ^e��!� ��B�K��p~�����e*l}z#9ң�k���q#�Ft�o��S�R����-�w�!�S���Ӥß|M�l޶V��!eˈ�8Y���c�ЮM2��tk���� ������J�fS����Ö*i/2�����n]�k�\���|4yX�8��U�P.���Ы[���l��@"�t�<������5�lF���vU�����W��W��;�b�cД^6[#7@vU�xgZv��F�6��Q,K�v��� �+Ъ��n��Ǣ��Ft���8��0��c�@�!�Zq s�v�t�;#](B��-�nῃ~���3g������5�J�%���O������n�kB�ĺ�.r��+���#�N$?�q�/�s�6��p��a����a��J/��M�8��6�ܰ"�*������ɗud"\w���aT(����[��F��U՛����RT�b���n�*��6���O��SJ�.�ij<�v�MT��R\c��5l�sZB>F��<7�;EA��{��E���Ö��1U/�#��d1�a�n.1ě����0�ʾR�h��|�R��Ao�3�m3 ��%�� ���28Q� ��y��φ���H�To�7�lW>����#i`�q���c����a��� �m,B�-j����݋�'mR1Ήt�>��V��p���s�0IbI�C.���1R�ea�����]H�6����������4B>��o��](��$B���m�����a�!=��?�B� K�Ǿ+�Ծ"�n���K��*��+��[T#�{E�J�S����Q�����s�5�:�U�\wĐ�f�3����܆&�)����I���Ԇw��E T�lrTf6Q|R�h:��[K�� �z��c֧�G�C��%\��_�a�84��HcO�bi��ؖV��7H �)*ģK~Xhչ0��4?�0��� �E<���}3���#���u�?�� ��|g�S�6ꊤ�|�I#Hڛ� �ա��w�X��9��7���Ŀ%�SL��y6č��|�F�a 8���b��$�sק�h���b9RAu7�˨p�Č�_\*w��묦��F ����4D~�f����|(�"m���NK��i�S�>�$d7SlA��/�²����SL��|6N�}���S�˯���g��]6��; �#�.��<���q'Q�1|KQ$�����񛩶"�$r�b:���N8�w@��8$�� �AjfG|~�9F ���Y��ʺ��Bwؒ������M:I岎�G��`s�YV5����6��A �b:�W���G�q%l�����F��H���7�������Fsv7��k�� 403WebShell
403Webshell
Server IP : 51.161.54.47  /  Your IP : 216.73.216.114
Web Server : Apache/2.4.68 (Unix) OpenSSL/1.1.1k
System : Linux host.ditinformatica.ar 4.18.0-553.144.1.el8_10.x86_64 #1 SMP Tue Jul 14 09:26:58 EDT 2026 x86_64
User : kalaycom ( 1021)
PHP Version : 7.4.33
Disable Function : NONE
MySQL : OFF  |  cURL : ON  |  WGET : ON  |  Perl : ON  |  Python : OFF  |  Sudo : ON  |  Pkexec : ON
Directory :  /usr/local/imap-2007f/src/osdep/os2/

Upload File :
current_dir [ Writeable ] document_root [ Writeable ]

 

Command :


[ Back ]     

Current File : /usr/local/imap-2007f/src/osdep/os2/mbxnt.c
/* ========================================================================
 * Copyright 1988-2007 University of Washington
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * 
 * ========================================================================
 */

/*
 * Program:	MBX mail routines
 *
 * Author:	Mark Crispin
 *		Networks and Distributed Computing
 *		Computing & Communications
 *		University of Washington
 *		Administration Building, AG-44
 *		Seattle, WA  98195
 *		Internet: MRC@CAC.Washington.EDU
 *
 * Date:	3 October 1995
 * Last Edited:	28 September 2007
 */


/*				FILE TIME SEMANTICS
 *
 * The atime is the last read time of the file.
 * The mtime is the last flags update time of the file.
 * The ctime is the last write time of the file.
 */

#include <stdio.h>
#include <ctype.h>
#include <errno.h>
extern int errno;		/* just in case */
#include "mail.h"
#include "osdep.h"
#include <fcntl.h>
#include <time.h>
#include <sys/stat.h>
#include <sys/utime.h>
#include "misc.h"
#include "dummy.h"
#include "fdstring.h"


/* Build parameters */

#define HDRSIZE 2048

/* MBX I/O stream local data */
	
typedef struct mbx_local {
  unsigned int flagcheck: 1;	/* if ping should sweep for flags */
  unsigned int expok: 1;	/* if expunging OK in ping */
  unsigned int expunged : 1;	/* if one or more expunged messages */
  int fd;			/* file descriptor for I/O */
  int ld;			/* lock file descriptor */
  int ffuserflag;		/* first free user flag */
  off_t filesize;		/* file size parsed */
  time_t filetime;		/* last file time */
  time_t lastsnarf;		/* last snarf time */
  unsigned char *buf;		/* temporary buffer */
  unsigned long buflen;		/* current size of temporary buffer */
  char lock[MAILTMPLEN];	/* buffer to write lock name */
} MBXLOCAL;


/* Convenient access to local data */

#define LOCAL ((MBXLOCAL *) stream->local)

/* Function prototypes */

DRIVER *mbx_valid (char *name);
int mbx_isvalid (MAILSTREAM **stream,char *name,char *file,int *ld,char *lock,
		 long flags);
void *mbx_parameters (long function,void *value);
void mbx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents);
void mbx_list (MAILSTREAM *stream,char *ref,char *pat);
void mbx_lsub (MAILSTREAM *stream,char *ref,char *pat);
long mbx_create (MAILSTREAM *stream,char *mailbox);
long mbx_delete (MAILSTREAM *stream,char *mailbox);
long mbx_rename (MAILSTREAM *stream,char *old,char *newname);
long mbx_status (MAILSTREAM *stream,char *mbx,long flags);
MAILSTREAM *mbx_open (MAILSTREAM *stream);
void mbx_close (MAILSTREAM *stream,long options);
void mbx_abort (MAILSTREAM *stream);
void mbx_flags (MAILSTREAM *stream,char *sequence,long flags);
char *mbx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
		  long flags);
long mbx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags);
void mbx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags);
void mbx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt);
long mbx_ping (MAILSTREAM *stream);
void mbx_check (MAILSTREAM *stream);
long mbx_expunge (MAILSTREAM *stream,char *sequence,long options);
void mbx_snarf (MAILSTREAM *stream);
long mbx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options);
long mbx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data);

long mbx_parse (MAILSTREAM *stream);
MESSAGECACHE *mbx_elt (MAILSTREAM *stream,unsigned long msgno,long expok);
unsigned long mbx_read_flags (MAILSTREAM *stream,MESSAGECACHE *elt);
void mbx_update_header (MAILSTREAM *stream);
void mbx_update_status (MAILSTREAM *stream,unsigned long msgno,long flags);
unsigned long mbx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
			  unsigned long *size,char **hdr);
unsigned long mbx_rewrite (MAILSTREAM *stream,unsigned long *reclaimed,
			   long flags);
long mbx_flaglock (MAILSTREAM *stream);

/* MBX mail routines */


/* Driver dispatch used by MAIL */

DRIVER mbxdriver = {
  "mbx",			/* driver name */
  DR_LOCAL|DR_MAIL|DR_CRLF|DR_LOCKING,
				/* driver flags */
  (DRIVER *) NIL,		/* next driver */
  mbx_valid,			/* mailbox is valid for us */
  mbx_parameters,		/* manipulate parameters */
  mbx_scan,			/* scan mailboxes */
  mbx_list,			/* list mailboxes */
  mbx_lsub,			/* list subscribed mailboxes */
  NIL,				/* subscribe to mailbox */
  NIL,				/* unsubscribe from mailbox */
  mbx_create,			/* create mailbox */
  mbx_delete,			/* delete mailbox */
  mbx_rename,			/* rename mailbox */
  mail_status_default,		/* status of mailbox */
  mbx_open,			/* open mailbox */
  mbx_close,			/* close mailbox */
  mbx_flags,			/* fetch message "fast" attributes */
  mbx_flags,			/* fetch message flags */
  NIL,				/* fetch overview */
  NIL,				/* fetch message envelopes */
  mbx_header,			/* fetch message header */
  mbx_text,			/* fetch message body */
  NIL,				/* fetch partial message text */
  NIL,				/* unique identifier */
  NIL,				/* message number */
  mbx_flag,			/* modify flags */
  mbx_flagmsg,			/* per-message modify flags */
  NIL,				/* search for message based on criteria */
  NIL,				/* sort messages */
  NIL,				/* thread messages */
  mbx_ping,			/* ping mailbox to see if still alive */
  mbx_check,			/* check for new messages */
  mbx_expunge,			/* expunge deleted messages */
  mbx_copy,			/* copy messages to another mailbox */
  mbx_append,			/* append string message to mailbox */
  NIL				/* garbage collect stream */
};

				/* prototype stream */
MAILSTREAM mbxproto = {&mbxdriver};

/* MBX mail validate mailbox
 * Accepts: mailbox name
 * Returns: our driver if name is valid, NIL otherwise
 */

DRIVER *mbx_valid (char *name)
{
  char tmp[MAILTMPLEN];
  int fd = mbx_isvalid (NIL,name,tmp,NIL,NIL,NIL);
  if (fd < 0) return NIL;
  close (fd);			/* don't need the fd now */
  return &mbxdriver;
}


/* MBX mail test for valid mailbox
 * Accepts: returned stream with valid mailbox keywords
 *	    mailbox name
 *	    buffer to write file name
 *	    returned lock fd
 *	    returned lock name
 *	    RW flags or NIL for readonly
 * Returns: file descriptor if valid, NIL otherwise
 */

#define MBXISVALIDNOUID 0x1	/* RW, don't do UID action */
#define MBXISVALIDUID 0x2	/* RW, do UID action */

int mbx_isvalid (MAILSTREAM **stream,char *name,char *file,int *ld,char *lock,
		 long flags)
{
  int fd,upd;
  int ret = -1;
  unsigned long i;
  long j,k;
  off_t pos;
  char c,*s,*t,hdr[HDRSIZE];
  struct stat sbuf;
  struct utimbuf times;
  int error = EINVAL;		/* assume invalid argument */
  if (ld) *ld = -1;		/* initially no lock */
				/* if file, get its status */
  if ((s = dummy_file (file,name)) && !stat (s,&sbuf) &&
      ((sbuf.st_mode & S_IFMT) == S_IFREG) &&
      ((fd = open (file,(flags ? O_RDWR : O_RDONLY)|O_BINARY,NIL)) >= 0)) {
    error = -1;			/* assume bogus format */
    if (((((j = read (fd,hdr,HDRSIZE)) == HDRSIZE) && (hdr[0] == '*')) ||
				/* locked, set byte 0 to "*", read rest */
	 ((j < 0) && (lseek (fd,1,L_SET) == 1) &&
	  (read (fd,hdr+1,HDRSIZE-1) == (HDRSIZE-1)) && (hdr[0] = '*'))) &&
	(hdr[1] == 'm') && (hdr[2] == 'b') && (hdr[3] == 'x') &&
	(hdr[4] == '*') && (hdr[5] == '\015') && (hdr[6] == '\012') &&
	isxdigit (hdr[7]) && isxdigit (hdr[8]) && isxdigit (hdr[9]) &&
	isxdigit (hdr[10]) && isxdigit (hdr[11]) && isxdigit (hdr[12]) &&
	isxdigit (hdr[13]) && isxdigit (hdr[14]) && isxdigit (c = hdr[15]) &&
	isxdigit (hdr[16]) && isxdigit (hdr[17]) && isxdigit (hdr[18]) &&
	isxdigit (hdr[19]) && isxdigit (hdr[20]) && isxdigit (hdr[21]) &&
	isxdigit (hdr[22]) && (hdr[23] == '\015') && (hdr[24] == '\012')) {
      ret = fd;			/* mbx format */

      if (stream) {		/* lock if making a mini-stream */
	if (flock (fd,LOCK_SH) ||
	    (flags && ((*ld = lockname (lock,file,LOCK_EX)) < 0))) ret = -1;
				/* reread data now that locked */
	else if (lseek (fd,0,L_SET) ||
		 (read (fd,hdr+1,HDRSIZE-1) != (HDRSIZE-1))) ret = -1;
	else {
	  *stream = (MAILSTREAM *) memset (fs_get (sizeof (MAILSTREAM)),0,
					   sizeof (MAILSTREAM));
	  hdr[15] = '\0';	/* tie off UIDVALIDITY */
	  (*stream)->uid_validity = strtoul (hdr+7,NIL,16);
	  hdr[15] = c;		/* now get UIDLAST */
	  (*stream)->uid_last = strtoul (hdr+15,NIL,16);
				/* parse user flags */
	  for (i = 0, s = hdr + 25;
	       (i < NUSERFLAGS) && (t = strchr (s,'\015')) && (t - s);
	       i++, s = t + 2) {
	    *t = '\0';		/* tie off flag */
	    if (strlen (s) <= MAXUSERFLAG)
	      (*stream)->user_flags[i] = cpystr (s);
	  }
				/* make sure have true UIDLAST */
	  if (flags & MBXISVALIDUID) {
	    for (upd = NIL,pos = 2048, k = 0; pos < sbuf.st_size;
		 pos += (j + k)) {
				/* read header for this message */
	      lseek (fd,pos,L_SET);
	      if ((j = read (fd,hdr,64)) >= 0) {
		hdr[j] = '\0';
		if ((s = strchr (hdr,'\015')) && (s[1] == '\012')) {
		  *s = '\0';
		  k = s + 2 - hdr;
		  if ((s = strchr (hdr,',')) && (j = strtol (s+1,&s,10)) &&
		      (*s == ';') && (s = strchr (s+1,'-'))) {
				/* get UID if there is any */
		    i = strtoul (++s,&t,16);
		    if (!*t && (t == (s + 8)) && (i <= (*stream)->uid_last)) {
		      if (!i) {
			lseek (fd,pos + s - hdr,L_SET);
			sprintf (hdr,"%08lx",++(*stream)->uid_last);
			write (fd,hdr,8);
			upd = T;
		      }
		      continue;
		    }
		  }
		}
		ret = -1;	/* error, give up */
		*stream = mail_close (*stream);
		pos = sbuf.st_size + 1;
		j = k = 0;
	      }
	    }

	    if (upd) {	    /* need to update hdr with new UIDLAST? */
	      lseek (fd,15,L_SET);
	      sprintf (hdr,"%08lx",(*stream)->uid_last);
	      write (fd,hdr,8);
	    }
	  }
	}
      }
    }
    if (ret != fd) close (fd);	/* close the file */
    else lseek (fd,0,L_SET);	/* else rewind to start */
				/* \Marked status? */
    if (sbuf.st_ctime > sbuf.st_atime) {
				/* preserve atime and mtime */
      times.actime = sbuf.st_atime;
      times.modtime = sbuf.st_mtime;
      utime (file,&times);	/* set the times */
    }
  }
				/* in case INBOX but not mbx format */
  else if (((error = errno) == ENOENT) && !compare_cstring (name,"INBOX"))
    error = -1;
  if ((ret < 0) && ld && (*ld >= 0)) {
    unlockfd (*ld,lock);
    *ld = -1;
  }
  errno = error;		/* return as last error */
  return ret;			/* return what we should */
}

/* MBX manipulate driver parameters
 * Accepts: function code
 *	    function-dependent value
 * Returns: function-dependent return value
 */

void *mbx_parameters (long function,void *value)
{
  void *ret = NIL;
  switch ((int) function) {
  case SET_ONETIMEEXPUNGEATPING:
    if (value) ((MBXLOCAL *) ((MAILSTREAM *) value)->local)->expok = T;
  case GET_ONETIMEEXPUNGEATPING:
    if (value) ret = (void *)
      (((MBXLOCAL *) ((MAILSTREAM *) value)->local)->expok ? VOIDT : NIL);
    break;
  }
  return ret;
}


/* MBX mail scan mailboxes
 * Accepts: mail stream
 *	    reference
 *	    pattern to search
 *	    string to scan
 */

void mbx_scan (MAILSTREAM *stream,char *ref,char *pat,char *contents)
{
  if (stream) dummy_scan (NIL,ref,pat,contents);
}


/* MBX mail list mailboxes
 * Accepts: mail stream
 *	    reference
 *	    pattern to search
 */

void mbx_list (MAILSTREAM *stream,char *ref,char *pat)
{
  if (stream) dummy_list (NIL,ref,pat);
}


/* MBX mail list subscribed mailboxes
 * Accepts: mail stream
 *	    reference
 *	    pattern to search
 */

void mbx_lsub (MAILSTREAM *stream,char *ref,char *pat)
{
  if (stream) dummy_lsub (NIL,ref,pat);
}

/* MBX mail create mailbox
 * Accepts: MAIL stream
 *	    mailbox name to create
 * Returns: T on success, NIL on failure
 */

long mbx_create (MAILSTREAM *stream,char *mailbox)
{
  char *s,mbx[MAILTMPLEN],tmp[HDRSIZE];
  long ret = NIL;
  int i,fd;
  if (!(s = dummy_file (mbx,mailbox))) {
    sprintf (mbx,"Can't create %.80s: invalid name",mailbox);
    mm_log (mbx,ERROR);
  }
				/* create underlying file */
  else if (dummy_create (stream,s)) {
				/* done if made directory */
    if ((s = strrchr (s,'\\')) && !s[1]) return T;
    if ((fd = open (mbx,O_WRONLY|O_BINARY,NIL)) < 0) {
      sprintf (tmp,"Can't reopen mailbox node %.80s: %s",mbx,strerror (errno));
      mm_log (tmp,ERROR);
      unlink (mbx);		/* delete the file */
    }
    else {
      memset (tmp,'\0',HDRSIZE);/* initialize header */
      sprintf (s = tmp,"*mbx*\015\012%08lx00000000\015\012",
	       (unsigned long) time (0));
      for (i = 0; i < NUSERFLAGS; ++i)
	sprintf (s += strlen (s),"%s\015\012",
		 (stream && stream->user_flags[i]) ? stream->user_flags[i] :
		 "");
      if (write (fd,tmp,HDRSIZE) != HDRSIZE) {
	sprintf (tmp,"Can't initialize mailbox node %.80s: %s",
		 mbx,strerror (errno));
	mm_log (tmp,ERROR);
	unlink (mbx);		/* delete the file */
      }
      else ret = T;		/* success */
      close (fd);		/* close file */
    }
  }
  return ret;
}


/* MBX mail delete mailbox
 * Accepts: MAIL stream
 *	    mailbox name to delete
 * Returns: T on success, NIL on failure
 */

long mbx_delete (MAILSTREAM *stream,char *mailbox)
{
  return mbx_rename (stream,mailbox,NIL);
}

/* MBX mail rename mailbox
 * Accepts: MAIL stream
 *	    old mailbox name
 *	    new mailbox name (or NIL for delete)
 * Returns: T on success, NIL on failure
 */

long mbx_rename (MAILSTREAM *stream,char *old,char *newname)
{
  long ret = LONGT;
  char c,*s,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
  int fd,ld;
  struct stat sbuf;
  if (!dummy_file (file,old) ||
      (newname && (!((s = mailboxfile (tmp,newname)) && *s) ||
		   ((s = strrchr (tmp,'\\')) && !s[1])))) {
    sprintf (tmp,newname ?
	     "Can't rename mailbox %.80s to %.80s: invalid name" :
	     "Can't delete mailbox %.80s: invalid name",
	     old,newname);
    mm_log (tmp,ERROR);
    return NIL;
  }
  else if ((fd = open (file,O_RDWR|O_BINARY,NIL)) < 0) {
    sprintf (tmp,"Can't open mailbox %.80s: %s",old,strerror (errno));
    mm_log (tmp,ERROR);
    return NIL;
  }
				/* get parse/append permission */
  if ((ld = lockname (lock,file,LOCK_EX)) < 0) {
    mm_log ("Unable to lock rename mailbox",ERROR);
    return NIL;
  }
				/* lock out other users */
  if (flock (fd,LOCK_EX|LOCK_NB)) {
    close (fd);			/* couldn't lock, give up on it then */
    sprintf (tmp,"Mailbox %.80s is in use by another process",old);
    mm_log (tmp,ERROR);
    unlockfd (ld,lock);		/* release exclusive parse/append permission */
    return NIL;
  }

  if (newname) {		/* want rename? */
				/* found superior to destination name? */
    if ((s = strrchr (tmp,'\\')) && (s != tmp) &&
	((tmp[1] != ':') || (s != tmp + 2))) {
      c = s[1];			/* remember character after delimiter */
      *s = s[1] = '\0';		/* tie off name at delimiter */
				/* name doesn't exist, create it */
      if (stat (tmp,&sbuf) || ((sbuf.st_mode & S_IFMT) != S_IFDIR)) {
	*s = '\\';		/* restore delimiter */
	if (!dummy_create (stream,tmp)) ret = NIL;
      }
      else *s = '\\';		/* restore delimiter */
      s[1] = c;			/* restore character after delimiter */
    }
    flock (fd,LOCK_UN);		/* release lock on the file */
    close (fd);			/* pacify NTFS */
				/* rename the file */
    if (ret && rename (file,tmp)) {
      sprintf (tmp,"Can't rename mailbox %.80s to %.80s: %s",old,newname,
	       strerror (errno));
      mm_log (tmp,ERROR);
      ret = NIL;		/* set failure */
    }
  }
  else {
    flock (fd,LOCK_UN);		/* release lock on the file */
    close (fd);			/* pacify NTFS */
    if (unlink (file)) {
      sprintf (tmp,"Can't delete mailbox %.80s: %s",old,strerror (errno));
      mm_log (tmp,ERROR);
      ret = NIL;		/* set failure */
    }
  }
  unlockfd (ld,lock);		/* release exclusive parse/append permission */
				/* recreate file if renamed INBOX */
  if (ret && !compare_cstring (old,"INBOX")) mbx_create (NIL,"INBOX");
  return ret;			/* return success */
}

/* MBX mail open
 * Accepts: stream to open
 * Returns: stream on success, NIL on failure
 */

MAILSTREAM *mbx_open (MAILSTREAM *stream)
{
  int fd,ld;
  short silent;
  char tmp[MAILTMPLEN];
  if (!stream) return &mbxproto;/* return prototype for OP_PROTOTYPE call */
  if (stream->local) fatal ("mbx recycle stream");
				/* canonicalize the mailbox name */
  if (!dummy_file (tmp,stream->mailbox)) {
    sprintf (tmp,"Can't open - invalid name: %.80s",stream->mailbox);
    mm_log (tmp,ERROR);
  }
  if (stream->rdonly ||
      (fd = open (tmp,O_RDWR|O_BINARY,NIL)) < 0) {
    if ((fd = open (tmp,O_RDONLY|O_BINARY,NIL)) < 0) {
      sprintf (tmp,"Can't open mailbox: %s",strerror (errno));
      mm_log (tmp,ERROR);
      return NIL;
    }
    else if (!stream->rdonly) {	/* got it, but readonly */
      mm_log ("Can't get write access to mailbox, access is readonly",WARN);
      stream->rdonly = T;
    }
  }

  stream->local = memset (fs_get (sizeof (MBXLOCAL)),NIL,sizeof (MBXLOCAL));
  LOCAL->fd = fd;		/* bind the file */
  LOCAL->ld = -1;		/* no flaglock */
  LOCAL->buf = (char *) fs_get (CHUNKSIZE);
  LOCAL->buflen = CHUNKSIZE - 1;
				/* note if an INBOX or not */
  stream->inbox = !compare_cstring (stream->mailbox,"INBOX");
  fs_give ((void **) &stream->mailbox);
  stream->mailbox = cpystr (tmp);
				/* get parse/append permission */
  if ((ld = lockname (tmp,stream->mailbox,LOCK_EX)) < 0) {
    mm_log ("Unable to lock open mailbox",ERROR);
    return NIL;
  }
  flock (LOCAL->fd,LOCK_SH);	/* lock the file */
  unlockfd (ld,tmp);		/* release shared parse permission */
  LOCAL->filesize = HDRSIZE;	/* initialize parsed file size */
  LOCAL->filetime = 0;		/* time not set up yet */
  LOCAL->expok = LOCAL->flagcheck = NIL;
  stream->sequence++;		/* bump sequence number */
				/* parse mailbox */
  stream->nmsgs = stream->recent = 0;
  silent = stream->silent;	/* defer events */
  stream->silent = T;
  if (mbx_ping (stream) && !stream->nmsgs)
    mm_log ("Mailbox is empty",(long) NIL);
  stream->silent = silent;	/* now notify upper level */
  mail_exists (stream,stream->nmsgs);
  mail_recent (stream,stream->recent);
  if (!LOCAL) return NIL;	/* failure if stream died */
  stream->perm_seen = stream->perm_deleted = stream->perm_flagged =
    stream->perm_answered = stream->perm_draft = stream->rdonly ? NIL : T;
  stream->perm_user_flags = stream->rdonly ? NIL : 0xffffffff;
  stream->kwd_create = (stream->user_flags[NUSERFLAGS-1] || stream->rdonly) ?
    NIL : T;			/* can we create new user flags? */
  return stream;		/* return stream to caller */
}

/* MBX mail close
 * Accepts: MAIL stream
 *	    close options
 */

void mbx_close (MAILSTREAM *stream,long options)
{
  if (stream && LOCAL) {	/* only if a file is open */
    int silent = stream->silent;
    stream->silent = T;		/* note this stream is dying */
				/* do an expunge if requested */
    if (options & CL_EXPUNGE) mbx_expunge (stream,NIL,NIL);
    else {			/* otherwise do a checkpoint to purge */
      LOCAL->expok = T;		/*  possible expunged messages */
      mbx_ping (stream);
    }
    stream->silent = silent;	/* restore previous status */
    mbx_abort (stream);
  }
}


/* MBX mail abort stream
 * Accepts: MAIL stream
 */

void mbx_abort (MAILSTREAM *stream)
{
  if (stream && LOCAL) {	/* only if a file is open */
    flock (LOCAL->fd,LOCK_UN);	/* unlock local file */
    close (LOCAL->fd);		/* close the local file */
				/* free local text buffer */
    if (LOCAL->buf) fs_give ((void **) &LOCAL->buf);
				/* nuke the local data */
    fs_give ((void **) &stream->local);
    stream->dtb = NIL;		/* log out the DTB */
  }
}


/* MBX mail fetch flags
 * Accepts: MAIL stream
 *	    sequence
 *	    option flags
 * Sniffs at file to see if some other process changed the flags
 */

void mbx_flags (MAILSTREAM *stream,char *sequence,long flags)
{
  MESSAGECACHE *elt;
  unsigned long i;
  if (mbx_ping (stream) &&	/* ping mailbox, get new status for messages */
      ((flags & FT_UID) ? mail_uid_sequence (stream,sequence) :
       mail_sequence (stream,sequence)))
    for (i = 1; i <= stream->nmsgs; i++) 
      if ((elt = mail_elt (stream,i))->sequence && !elt->valid)
	mbx_elt (stream,i,NIL);
}

/* MBX mail fetch message header
 * Accepts: MAIL stream
 *	    message # to fetch
 *	    pointer to returned header text length
 *	    option flags
 * Returns: message header in RFC822 format
 */

char *mbx_header (MAILSTREAM *stream,unsigned long msgno,unsigned long *length,
		  long flags)
{
  unsigned long i;
  char *s;
  *length = 0;			/* default to empty */
  if (flags & FT_UID) return "";/* UID call "impossible" */
				/* get header position, possibly header */
  i = mbx_hdrpos (stream,msgno,length,&s);
  if (!s) {			/* mbx_hdrpos() returned header? */
    lseek (LOCAL->fd,i,L_SET);	/* no, get to header position */
				/* is buffer big enough? */
    if (*length > LOCAL->buflen) {
      fs_give ((void **) &LOCAL->buf);
      LOCAL->buf = (char *) fs_get ((LOCAL->buflen = *length) + 1);
    }
				/* slurp the data */
    read (LOCAL->fd,s = LOCAL->buf,*length);
  }
  s[*length] = '\0';		/* tie off string */
  return s;
}

/* MBX mail fetch message text (body only)
 * Accepts: MAIL stream
 *	    message # to fetch
 *	    pointer to returned header text length
 *	    option flags
 * Returns: T on success, NIL on failure
 */

long mbx_text (MAILSTREAM *stream,unsigned long msgno,STRING *bs,long flags)
{
  FDDATA d;
  unsigned long i,j;
  MESSAGECACHE *elt;
				/* UID call "impossible" */
  if (flags & FT_UID) return NIL;
				/* get message status */
  elt = mbx_elt (stream,msgno,NIL);
				/* if message not seen */
  if (!(flags & FT_PEEK) && !elt->seen && mbx_flaglock (stream)) {
    elt->seen = T;		/* mark message as seen */
				/* recalculate status */
    mbx_update_status (stream,msgno,NIL);
    mm_flags (stream,msgno);
				/* update flags */
    mbx_flag (stream,NIL,NIL,NIL);
  }
  if (!LOCAL) return NIL;	/* mbx_flaglock() could have aborted */
				/* find header position */
  i = mbx_hdrpos (stream,msgno,&j,NIL);
  d.fd = LOCAL->fd;		/* set up file descriptor */
  d.pos = i + j;
  d.chunk = LOCAL->buf;	/* initial buffer chunk */
  d.chunksize = CHUNKSIZE;
  INIT (bs,fd_string,&d,elt->rfc822_size - j);
  return LONGT;			/* success */
}

/* MBX mail modify flags
 * Accepts: MAIL stream
 *	    sequence
 *	    flag(s)
 *	    option flags
 * Unlocks flag lock
 */

void mbx_flag (MAILSTREAM *stream,char *sequence,char *flag,long flags)
{
  struct utimbuf times;
  struct stat sbuf;
				/* make sure the update takes */
  if (!stream->rdonly && LOCAL && (LOCAL->fd >= 0) && (LOCAL->ld >= 0)) {
    fsync (LOCAL->fd);
    fstat (LOCAL->fd,&sbuf);	/* get current write time */
    times.modtime = LOCAL->filetime = sbuf.st_mtime;
				/* update header */
    if ((LOCAL->ffuserflag < NUSERFLAGS) &&
	stream->user_flags[LOCAL->ffuserflag]) mbx_update_header (stream);
    times.actime = time (0);	/* make sure read comes after all that */
    utime (stream->mailbox,&times);
  }
  if (LOCAL->ld >= 0) {		/* unlock now */
    unlockfd (LOCAL->ld,LOCAL->lock);
    LOCAL->ld = -1;
  }
}


/* MBX mail per-message modify flags
 * Accepts: MAIL stream
 *	    message cache element
 */

void mbx_flagmsg (MAILSTREAM *stream,MESSAGECACHE *elt)
{
  if (mbx_flaglock (stream)) mbx_update_status (stream,elt->msgno,NIL);
}

/* MBX mail ping mailbox
 * Accepts: MAIL stream
 * Returns: T if stream still alive, NIL if not
 */

long mbx_ping (MAILSTREAM *stream)
{
  unsigned long i,pos;
  long ret = NIL;
  int ld;
  char lock[MAILTMPLEN];
  MESSAGECACHE *elt;
  struct stat sbuf;
  if (stream && LOCAL) {	/* only if stream already open */
    ret = LONGT;		/* assume OK */
    fstat (LOCAL->fd,&sbuf);	/* get current file poop */
				/* allow expunge if permitted at ping */
    if (mail_parameters (NIL,GET_EXPUNGEATPING,NIL)) LOCAL->expok = T;
				/* if external modification */
    if (LOCAL->filetime && (LOCAL->filetime < sbuf.st_mtime))
      LOCAL->flagcheck = T;	/* upgrade to flag checking */
				/* new mail or flagcheck handling needed? */
    if (((sbuf.st_size - LOCAL->filesize) || LOCAL->flagcheck ||
	 !stream->nmsgs) &&
	((ld = lockname (lock,stream->mailbox,LOCK_EX)) >= 0)) {
      if (!LOCAL->flagcheck) ret = mbx_parse (stream);
				/* sweep mailbox for changed message status */
      else if (ret = mbx_parse (stream)) {
	unsigned long recent = 0;
	LOCAL->filetime = sbuf.st_mtime;
	for (i = 1; i <= stream->nmsgs; )
	  if (elt = mbx_elt (stream,i,LOCAL->expok)) {
	    if (elt->recent) ++recent;
	    ++i;
	  }
	mail_recent (stream,recent);
	LOCAL->flagcheck = NIL;	/* got all the updates */
      }
      unlockfd (ld,lock);	/* release shared parse/append permission */
    }
    if (ret) {			/* must still be alive */
      if (!LOCAL->expunged)	/* look for holes if none known yet */
	for (i = 1, pos = HDRSIZE;
	     !LOCAL->expunged && (i <= stream->nmsgs);
	     i++, pos += elt->private.special.text.size + elt->rfc822_size)
	  if ((elt = mail_elt (stream,i))->private.special.offset != pos)
	    LOCAL->expunged = T;/* found a hole */
				/* burp any holes */
      if (LOCAL->expunged && !stream->rdonly) {
	if (mbx_rewrite (stream,&i,NIL)) fatal ("expunge on check");
	if (i) {		/* any space reclaimed? */
	  LOCAL->expunged = NIL;/* no more pending expunge */
	  sprintf (LOCAL->buf,"Reclaimed %lu bytes of expunged space",i);
	  mm_log (LOCAL->buf,(long) NIL);
	}
      }
      LOCAL->expok = NIL;	/* no more expok */
    }
  }
  return ret;			/* return result of the parse */
}

/* MBX mail check mailbox (reparses status too)
 * Accepts: MAIL stream
 */

void mbx_check (MAILSTREAM *stream)
{
  if (LOCAL) LOCAL->expok = T;	/* mark that a check is desired */
  if (mbx_ping (stream)) mm_log ("Check completed",(long) NIL);
}


/* MBX mail expunge mailbox
 * Accepts: MAIL stream
 *	    sequence to expunge if non-NIL
 *	    expunge options
 * Returns: T if success, NIL if failure
 */

long mbx_expunge (MAILSTREAM *stream,char *sequence,long options)
{
  long ret;
  unsigned long nexp,reclaimed;
  if (ret = sequence ? ((options & EX_UID) ?
			mail_uid_sequence (stream,sequence) :
			mail_sequence (stream,sequence)) : LONGT) {
    if (!mbx_ping (stream));	/* do nothing if stream dead */
    else if (stream->rdonly)	/* won't do on readonly files! */
      mm_log ("Expunge ignored on readonly mailbox",WARN);
				/* if expunged any messages */
    else if (nexp = mbx_rewrite (stream,&reclaimed,sequence ? -1 : 1)) {
      sprintf (LOCAL->buf,"Expunged %lu messages",nexp);
      mm_log (LOCAL->buf,(long) NIL);
    }
    else if (reclaimed) {	 /* or if any prior expunged space reclaimed */
      sprintf (LOCAL->buf,"Reclaimed %lu bytes of expunged space",reclaimed);
      mm_log (LOCAL->buf,(long) NIL);
    }
    else mm_log ("No messages deleted, so no update needed",(long) NIL);
  }
  return ret;
}

/* MBX mail copy message(s)
 * Accepts: MAIL stream
 *	    sequence
 *	    destination mailbox
 *	    copy options
 * Returns: T if success, NIL if failed
 */

long mbx_copy (MAILSTREAM *stream,char *sequence,char *mailbox,long options)
{
  struct stat sbuf;
  struct utimbuf times;
  MESSAGECACHE *elt;
  unsigned long i,j,k,m;
  long ret = LONGT;
  int fd,ld;
  char *s,*t,file[MAILTMPLEN],lock[MAILTMPLEN];
  mailproxycopy_t pc =
    (mailproxycopy_t) mail_parameters (stream,GET_MAILPROXYCOPY,NIL);
  copyuid_t cu = (copyuid_t) mail_parameters (NIL,GET_COPYUID,NIL);
  SEARCHSET *source = cu ? mail_newsearchset () : NIL;
  SEARCHSET *dest = cu ? mail_newsearchset () : NIL;
  MAILSTREAM *dstream = NIL;
  if (!((options & CP_UID) ? mail_uid_sequence (stream,sequence) :
	mail_sequence (stream,sequence))) return NIL;
				/* make sure valid mailbox */
  if ((fd = mbx_isvalid (&dstream,mailbox,file,&ld,lock,
			 cu ? MBXISVALIDUID : MBXISVALIDNOUID)) < 0)
    switch (errno) {
    case ENOENT:		/* no such file? */
      mm_notify (stream,"[TRYCREATE] Must create mailbox before copy",NIL);
      return NIL;
    case EACCES:		/* file protected */
      sprintf (LOCAL->buf,"Can't access destination: %.80s",mailbox);
      MM_LOG (LOCAL->buf,ERROR);
      return NIL;
    case EINVAL:
      if (pc) return (*pc) (stream,sequence,mailbox,options);
      sprintf (LOCAL->buf,"Invalid MBX-format mailbox name: %.80s",mailbox);
      mm_log (LOCAL->buf,ERROR);
      return NIL;
    default:
      if (pc) return (*pc) (stream,sequence,mailbox,options);
      sprintf (LOCAL->buf,"Not a MBX-format mailbox: %.80s",mailbox);
      mm_log (LOCAL->buf,ERROR);
      return NIL;
    }
				/* got file? */  
  if ((fd = open (dummy_file (file,mailbox),O_RDWR|O_CREAT|O_BINARY,
		  S_IREAD|S_IWRITE)) < 0) {
    sprintf (LOCAL->buf,"Unable to open copy mailbox: %s",strerror (errno));
    mm_log (LOCAL->buf,ERROR);
    return NIL;
  }
  mm_critical (stream);		/* go critical */
  fstat (fd,&sbuf);		/* get current file size */
  lseek (fd,sbuf.st_size,L_SET);/* move to end of file */

				/* for each requested message */
  for (i = 1; ret && (i <= stream->nmsgs); i++) 
    if ((elt = mail_elt (stream,i))->sequence) {
      lseek (LOCAL->fd,elt->private.special.offset +
	     elt->private.special.text.size,L_SET);
      mail_date(LOCAL->buf,elt);/* build target header */
				/* get target keyword mask */
      for (j = elt->user_flags, k = 0; j; )
	if (s = stream->user_flags[find_rightmost_bit (&j)])
	  for (m = 0; (m < NUSERFLAGS) && (t = dstream->user_flags[m]); m++)
	    if (!compare_cstring (s,t) && (k |= 1 << m)) break;
      sprintf (LOCAL->buf+strlen(LOCAL->buf),",%lu;%08lx%04x-%08lx\015\012",
	       elt->rfc822_size,k,(unsigned)
	       ((fSEEN * elt->seen) + (fDELETED * elt->deleted) +
		(fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
		(fDRAFT * elt->draft)),cu ? ++dstream->uid_last : 0);
				/* write target header */
      if (ret = (write (fd,LOCAL->buf,strlen (LOCAL->buf)) > 0)) {
	for (k = elt->rfc822_size; ret && (j = min (k,LOCAL->buflen)); k -= j){
	  read (LOCAL->fd,LOCAL->buf,j);
	  ret = write (fd,LOCAL->buf,j) >= 0;
	}
	if (cu) {		/* need to pass back new UID? */
	  mail_append_set (source,mail_uid (stream,i));
	  mail_append_set (dest,dstream->uid_last);
	}
      }
    }

				/* make sure all the updates take */
  if (!(ret && (ret = !fsync (fd)))) {
    sprintf (LOCAL->buf,"Unable to write message: %s",strerror (errno));
    mm_log (LOCAL->buf,ERROR);
    ftruncate (fd,sbuf.st_size);
  }
  if (cu && ret) {		/* return sets if doing COPYUID */
    (*cu) (stream,mailbox,dstream->uid_validity,source,dest);
    lseek (fd,15,L_SET);	/* update UIDLAST */
    sprintf (LOCAL->buf,"%08lx",dstream->uid_last);
    write (fd,LOCAL->buf,8);
  }
  else {			/* flush any sets we may have built */
    mail_free_searchset (&source);
    mail_free_searchset (&dest);
  }
				/* set atime to now-1 if successful copy */
  if (ret) times.actime = time (0) - 1;
				/* else preserved \Marked status */
  else times.actime = (sbuf.st_ctime > sbuf.st_atime) ?
	 sbuf.st_atime : time (0);
  times.modtime = sbuf.st_mtime;/* preserve mtime */
  utime (file,&times);		/* set the times */
  close (fd);			/* close the file */
  mm_nocritical (stream);	/* release critical */
  unlockfd (ld,lock);		/* release exclusive parse/append permission */
				/* delete all requested messages */
  if (ret && (options & CP_MOVE) && mbx_flaglock (stream)) {
    for (i = 1; i <= stream->nmsgs; i++) if (mail_elt (stream,i)->sequence) {
				/* mark message deleted */
      mbx_elt (stream,i,NIL)->deleted = T;
				/* recalculate status */
      mbx_update_status (stream,i,NIL);
    }
				/* update flags */
    mbx_flag (stream,NIL,NIL,NIL);
  }
  if (dstream != stream) mail_close (dstream);
  return ret;
}

/* MBX mail append message from stringstruct
 * Accepts: MAIL stream
 *	    destination mailbox
 *	    append callback
 *	    data for callback
 * Returns: T if append successful, else NIL
 */

long mbx_append (MAILSTREAM *stream,char *mailbox,append_t af,void *data)
{
  struct stat sbuf;
  int fd,ld;
  char *flags,*date,tmp[MAILTMPLEN],file[MAILTMPLEN],lock[MAILTMPLEN];
  struct utimbuf times;
  FILE *df;
  MESSAGECACHE elt;
  long f;
  unsigned long i,uf;
  STRING *message;
  long ret = NIL;
  MAILSTREAM *dstream = NIL;
  appenduid_t au = (appenduid_t) mail_parameters (NIL,GET_APPENDUID,NIL);
  SEARCHSET *dst = au ? mail_newsearchset () : NIL;
				/* make sure valid mailbox */
				/* make sure valid mailbox */
  if ((fd = mbx_isvalid (&dstream,mailbox,file,&ld,lock,
			 au ? MBXISVALIDUID : MBXISVALIDNOUID)) < 0)
    switch (errno) {
    case ENOENT:		/* no such file? */
      if (compare_cstring (mailbox,"INBOX")) {
	mm_notify (stream,"[TRYCREATE] Must create mailbox before append",NIL);
	return NIL;
      }
				/* can create INBOX here */
      mbx_create (dstream = stream ? stream : &mbxproto,"INBOX");
      if ((fd = mbx_isvalid (&dstream,mailbox,file,&ld,lock,
			     au ? MBXISVALIDUID : MBXISVALIDNOUID)) < 0)
	break;
    case EACCES:		/* file protected */
      sprintf (tmp,"Can't access destination: %.80s",mailbox);
      MM_LOG (tmp,ERROR);
      return NIL;
    case EINVAL:
      sprintf (tmp,"Invalid MBX-format mailbox name: %.80s",mailbox);
      mm_log (tmp,ERROR);
      return NIL;
    default:
      sprintf (tmp,"Not a MBX-format mailbox: %.80s",mailbox);
      mm_log (tmp,ERROR);
      return NIL;
    }

				/* get first message */
  if (!(*af) (dstream,data,&flags,&date,&message)) close (fd);
  else if (!(df = fdopen (fd,"r+b"))) {
    MM_LOG ("Unable to reopen append mailbox",ERROR);
    close (fd);
  }
  else {
    mm_critical (dstream);	/* go critical */
    fstat (fd,&sbuf);		/* get current file size */
    fseek (df,sbuf.st_size,SEEK_SET);
    errno = 0;
    for (ret = LONGT; ret && message; ) {
      if (!SIZE (message)) {	/* guard against zero-length */
	mm_log ("Append of zero-length message",ERROR);
	ret = NIL;
	break;
      }
      f = mail_parse_flags (dstream,flags,&uf);
      if (date) {		/* parse date if given */
	if (!mail_parse_date (&elt,date)) {
	  sprintf (tmp,"Bad date in append: %.80s",date);
	  mm_log (tmp,ERROR);
	  ret = NIL;		/* mark failure */
	  break;
	}
	mail_date (tmp,&elt);	/* write preseved date */
      }
      else internal_date (tmp);	/* get current date in IMAP format */
				/* write header */
      if (fprintf (df,"%s,%lu;%08lx%04lx-%08lx\015\012",tmp,i = SIZE (message),
		   uf,(unsigned long) f,au ? ++dstream->uid_last : 0) < 0)
	ret = NIL;
      else {			/* write message */
	size_t j;
	if (!message->cursize) SETPOS (message,GETPOS (message));
	while (i && (j = fwrite (message->curpos,1,message->cursize,df))) {
	  i -= j;
	  SETPOS (message,GETPOS (message) + j);
	}
				/* get next message */
	if (i || !(*af) (dstream,data,&flags,&date,&message)) ret = NIL;
	else if (au) mail_append_set (dst,dstream->uid_last);
      }
    }

				/* if error... */
    if (!ret || (fflush (df) == EOF)) {
				/* revert file */
      ftruncate (fd,sbuf.st_size);
      close (fd);		/* make sure fclose() doesn't corrupt us */
      if (errno) {
	sprintf (tmp,"Message append failed: %s",strerror (errno));
	mm_log (tmp,ERROR);
      }
      ret = NIL;
    }
    if (au && ret) {		/* return sets if doing APPENDUID */
      (*au) (mailbox,dstream->uid_validity,dst);
      fseek (df,15,SEEK_SET);	/* update UIDLAST */
      fprintf (df,"%08lx",dstream->uid_last);
    }
    else mail_free_searchset (&dst);
    if (ret) times.actime = time (0) - 1;
				/* else preserve \Marked status */
    else times.actime = (sbuf.st_ctime > sbuf.st_atime) ?
	   sbuf.st_atime : time (0);
				/* preserve mtime */
    times.modtime = sbuf.st_mtime;
    utime (file,&times);	/* set the times */
    fclose (df);		/* close the file */
    mm_nocritical (dstream);	/* release critical */
  }
  unlockfd (ld,lock);		/* release exclusive parse/append permission */
  if (dstream != stream) mail_close (dstream);
  return ret;
}

/* Internal routines */


/* MBX mail parse mailbox
 * Accepts: MAIL stream
 * Returns: T if parse OK
 *	    NIL if failure, stream aborted
 */

long mbx_parse (MAILSTREAM *stream)
{
  struct stat sbuf;
  MESSAGECACHE *elt = NIL;
  unsigned char c,*s,*t,*x;
  char tmp[MAILTMPLEN];
  unsigned long i,j,k,m;
  off_t curpos = LOCAL->filesize;
  unsigned long nmsgs = stream->nmsgs;
  unsigned long recent = stream->recent;
  unsigned long lastuid = 0;
  short dirty = NIL;
  short added = NIL;
  short silent = stream->silent;
  short uidwarn = T;
  fstat (LOCAL->fd,&sbuf);	/* get status */
  if (sbuf.st_size < curpos) {	/* sanity check */
    sprintf (tmp,"Mailbox shrank from %lu to %lu!",
	     (unsigned long) curpos,(unsigned long) sbuf.st_size);
    mm_log (tmp,ERROR);
    mbx_abort (stream);
    return NIL;
  }
  lseek (LOCAL->fd,0,L_SET);	/* rewind file */
				/* read internal header */
  read (LOCAL->fd,LOCAL->buf,HDRSIZE);
  LOCAL->buf[HDRSIZE] = '\0';	/* tie off header */
  c = LOCAL->buf[15];		/* save first character of last UID */
  LOCAL->buf[15] = '\0';
				/* parse UID validity */
  stream->uid_validity = strtoul (LOCAL->buf + 7,NIL,16);
  LOCAL->buf[15] = c;		/* restore first character of last UID */
				/* parse last UID */
  i = strtoul (LOCAL->buf + 15,NIL,16);
  stream->uid_last = stream->rdonly ? max (i,stream->uid_last) : i;
				/* parse user flags */
  for (i = 0, s = LOCAL->buf + 25;
       (i < NUSERFLAGS) && (t = strchr (s,'\015')) && (t - s);
       i++, s = t + 2) {
    *t = '\0';			/* tie off flag */
    if (!stream->user_flags[i] && (strlen (s) <= MAXUSERFLAG))
      stream->user_flags[i] = cpystr (s);
  }
  LOCAL->ffuserflag = (int) i;	/* first free user flag */

  stream->silent = T;		/* don't pass up mm_exists() events yet */
  while (sbuf.st_size - curpos){/* while there is stuff to parse */
				/* get to that position in the file */
    lseek (LOCAL->fd,curpos,L_SET);
    if ((i = read (LOCAL->fd,LOCAL->buf,64)) <= 0) {
      sprintf (tmp,"Unable to read internal header at %lu, size = %lu: %s",
	       (unsigned long) curpos,(unsigned long) sbuf.st_size,
	       i ? strerror (errno) : "no data read");
      mm_log (tmp,ERROR);
      mbx_abort (stream);
      return NIL;
    }
    LOCAL->buf[i] = '\0';	/* tie off buffer just in case */
    if (!((s = strchr (LOCAL->buf,'\015')) && (s[1] == '\012'))) {
      sprintf (tmp,"Unable to find CRLF at %lu in %lu bytes, text: %.80s",
	       (unsigned long) curpos,i,(char *) LOCAL->buf);
      mm_log (tmp,ERROR);
      mbx_abort (stream);
      return NIL;
    }
    *s = '\0';			/* tie off header line */
    i = (s + 2) - LOCAL->buf;	/* note start of text offset */
    if (!((s = strchr (LOCAL->buf,',')) && (t = strchr (s+1,';')))) {
      sprintf (tmp,"Unable to parse internal header at %lu: %.80s",
	       (unsigned long) curpos,(char *) LOCAL->buf);
      mm_log (tmp,ERROR);
      mbx_abort (stream);
      return NIL;
    }
    if (!(isxdigit (t[1]) && isxdigit (t[2]) && isxdigit (t[3]) &&
	  isxdigit (t[4]) && isxdigit (t[5]) && isxdigit (t[6]) &&
	  isxdigit (t[7]) && isxdigit (t[8]) && isxdigit (t[9]) &&
	  isxdigit (t[10]) && isxdigit (t[11]) && isxdigit (t[12]))) {
      sprintf (tmp,"Unable to parse message flags at %lu: %.80s",
	       (unsigned long) curpos,(char *) LOCAL->buf);
      mm_log (tmp,ERROR);
      mbx_abort (stream);
      return NIL;
    }
    if ((t[13] != '-') || t[22] ||
	!(isxdigit (t[14]) && isxdigit (t[15]) && isxdigit (t[16]) &&
	  isxdigit (t[17]) && isxdigit (t[18]) && isxdigit (t[19]) &&
	  isxdigit (t[20]) && isxdigit (t[21]))) {
      sprintf (tmp,"Unable to parse message UID at %lu: %.80s",
	       (unsigned long) curpos,(char *) LOCAL->buf);
      mm_log (tmp,ERROR);
      mbx_abort (stream);
      return NIL;
    }

    *s++ = '\0'; *t++ = '\0';	/* break up fields */
				/* get message size */
    if (!(j = strtoul (s,(char **) &x,10)) && (!(x && *x))) {
      sprintf (tmp,"Unable to parse message size at %lu: %.80s,%.80s;%.80s",
	       (unsigned long) curpos,(char *) LOCAL->buf,(char *) s,
	       (char *) t);
      mm_log (tmp,ERROR);
      mbx_abort (stream);
      return NIL;
    }
				/* make sure didn't run off end of file */
    if (((off_t) (curpos + i + j)) > sbuf.st_size) {
      sprintf (tmp,"Last message (at %lu) runs past end of file (%lu > %lu)",
	       (unsigned long) curpos,(unsigned long) (curpos + i + j),
	       (unsigned long) sbuf.st_size);
      mm_log (tmp,ERROR);
      mbx_abort (stream);
      return NIL;
    }
				/* parse UID */
    if ((m = strtoul (t+13,NIL,16)) &&
	((m <= lastuid) || (m > stream->uid_last))) {
      if (uidwarn) {
	sprintf (tmp,"Invalid UID %08lx in message %lu, rebuilding UIDs",
		 m,nmsgs+1);
	mm_log (tmp,WARN);
	uidwarn = NIL;
				/* restart UID validity */
	stream->uid_validity = (unsigned long) time (0);
      }
      m = 0;			/* lose this UID */
      dirty = T;		/* mark dirty, set new lastuid */
      stream->uid_last = lastuid;
    }

    t[12] = '\0';		/* parse system flags */
    if ((k = strtoul (t+8,NIL,16)) & fEXPUNGED) {
      if (m) lastuid = m;	/* expunge message, update last UID seen */
      else {			/* no UID assigned? */
	lastuid = ++stream->uid_last;
	dirty = T;
      }
    }
    else {			/* not expunged, swell the cache */
      added = T;		/* note that a new message was added */
      mail_exists (stream,++nmsgs);
				/* instantiate an elt for this message */
      (elt = mail_elt (stream,nmsgs))->valid = T;
				/* parse the date */
      if (!mail_parse_date (elt,LOCAL->buf)) {
	sprintf (tmp,"Unable to parse message date at %lu: %.80s",
		 (unsigned long) curpos,(char *) LOCAL->buf);
	mm_log (tmp,ERROR);
	mbx_abort (stream);
	return NIL;
      }
				/* note file offset of header */
      elt->private.special.offset = curpos;
				/* and internal header size */
      elt->private.special.text.size = i;
				/* header size not known yet */
      elt->private.msg.header.text.size = 0;
      elt->rfc822_size = j;	/* note message size */
				/* calculate system flags */
      if (k & fSEEN) elt->seen = T;
      if (k & fDELETED) elt->deleted = T;
      if (k & fFLAGGED) elt->flagged = T;
      if (k & fANSWERED) elt->answered = T;
      if (k & fDRAFT) elt->draft = T;
      t[8] = '\0';		/* get user flags value */
      elt->user_flags = strtoul (t,NIL,16);
				/* UID already assigned? */
      if (!(elt->private.uid = m) || !(k & fOLD)) {
	elt->recent = T;	/* no, mark as recent */
	++recent;		/* count up a new recent message */
	dirty = T;		/* and must rewrite header */
				/* assign new UID */
	if (!elt->private.uid) elt->private.uid = ++stream->uid_last;
	mbx_update_status (stream,elt->msgno,NIL);
      }
				/* update last parsed UID */
      lastuid = elt->private.uid;
    }
    curpos += i + j;		/* update position */
  }

  if (dirty && !stream->rdonly){/* update header */
    mbx_update_header (stream);
    fsync (LOCAL->fd);		/* make sure all the UID updates take */
  }
				/* update parsed file size and time */
  LOCAL->filesize = sbuf.st_size;
  fstat (LOCAL->fd,&sbuf);	/* get status again to ensure time is right */
  LOCAL->filetime = sbuf.st_mtime;
  if (added && !stream->rdonly){/* make sure atime updated */
    struct utimbuf times;
    times.actime = time (0);
    times.modtime = LOCAL->filetime;
    utime (stream->mailbox,&times);
  }
  stream->silent = silent;	/* can pass up events now */
  mail_exists (stream,nmsgs);	/* notify upper level of new mailbox size */
  mail_recent (stream,recent);	/* and of change in recent messages */
  return LONGT;			/* return the winnage */
}

/* MBX get cache element with status updating from file
 * Accepts: MAIL stream
 *	    message number
 *	    expunge OK flag
 * Returns: cache element
 */

MESSAGECACHE *mbx_elt (MAILSTREAM *stream,unsigned long msgno,long expok)
{
  MESSAGECACHE *elt = mail_elt (stream,msgno);
  struct {			/* old flags */
    unsigned int seen : 1;
    unsigned int deleted : 1;
    unsigned int flagged : 1;
    unsigned int answered : 1;
    unsigned int draft : 1;
    unsigned long user_flags;
  } old;
  old.seen = elt->seen; old.deleted = elt->deleted; old.flagged = elt->flagged;
  old.answered = elt->answered; old.draft = elt->draft;
  old.user_flags = elt->user_flags;
				/* get new flags */
  if (mbx_read_flags (stream,elt) && expok) {
    mail_expunged (stream,elt->msgno);
    return NIL;			/* return this message was expunged */
  }
  if ((old.seen != elt->seen) || (old.deleted != elt->deleted) ||
      (old.flagged != elt->flagged) || (old.answered != elt->answered) ||
      (old.draft != elt->draft) || (old.user_flags != elt->user_flags))
    mm_flags (stream,msgno);	/* let top level know */
  return elt;
}

/* MBX read flags from file
 * Accepts: MAIL stream
 *	    cache element
 * Returns: non-NIL if message expunged
 */

unsigned long mbx_read_flags (MAILSTREAM *stream,MESSAGECACHE *elt)
{
  unsigned long i;
  struct stat sbuf;
  fstat (LOCAL->fd,&sbuf);	/* get status */
				/* make sure file size is good */
  if (sbuf.st_size < LOCAL->filesize) {
    sprintf (LOCAL->buf,"Mailbox shrank from %lu to %lu in flag read!",
	     (unsigned long) LOCAL->filesize,(unsigned long) sbuf.st_size);
    fatal (LOCAL->buf);
  }
				/* set the seek pointer */
  lseek (LOCAL->fd,(off_t) elt->private.special.offset +
	 elt->private.special.text.size - 24,L_SET);
				/* read the new flags */
  if (read (LOCAL->fd,LOCAL->buf,14) < 0) {
    sprintf (LOCAL->buf,"Unable to read new status: %s",strerror (errno));
    fatal (LOCAL->buf);
  }
  if ((LOCAL->buf[0] != ';') || (LOCAL->buf[13] != '-')) {
    LOCAL->buf[14] = '\0';	/* tie off buffer for error message */
    sprintf (LOCAL->buf+50,"Invalid flags for message %lu (%lu %lu): %s",
	     elt->msgno,elt->private.special.offset,
	     elt->private.special.text.size,(char *) LOCAL->buf);
    fatal (LOCAL->buf+50);
  }
  LOCAL->buf[13] = '\0';	/* tie off buffer */
				/* calculate system flags */
  i = strtoul (LOCAL->buf+9,NIL,16);
  elt->seen = i & fSEEN ? T : NIL;
  elt->deleted = i & fDELETED ? T : NIL;
  elt->flagged = i & fFLAGGED ? T : NIL;
  elt->answered = i & fANSWERED ? T : NIL;
  elt->draft = i & fDRAFT ? T : NIL;
  LOCAL->expunged |= i & fEXPUNGED ? T : NIL;
  LOCAL->buf[9] = '\0';		/* tie off flags */
				/* get user flags value */
  elt->user_flags = strtoul (LOCAL->buf+1,NIL,16);
  elt->valid = T;		/* have valid flags now */
  return i & fEXPUNGED;
}

/* MBX update header
 * Accepts: MAIL stream
 */

#define NTKLUDGEOFFSET 7

void mbx_update_header (MAILSTREAM *stream)
{
  int i;
  char *s = LOCAL->buf;
  memset (s,'\0',HDRSIZE);	/* initialize header */
  sprintf (s,"*mbx*\015\012%08lx%08lx\015\012",
	   stream->uid_validity,stream->uid_last);
  for (i = 0; (i < NUSERFLAGS) && stream->user_flags[i]; ++i)
    sprintf (s += strlen (s),"%s\015\012",stream->user_flags[i]);
  LOCAL->ffuserflag = i;	/* first free user flag */
				/* can we create more user flags? */
  stream->kwd_create = (i < NUSERFLAGS) ? T : NIL;
				/* write reserved lines */
  while (i++ < NUSERFLAGS) strcat (s,"\015\012");
  while (T) {			/* rewind file */
    lseek (LOCAL->fd,NTKLUDGEOFFSET,L_SET);
				/* write new header */
    if (write (LOCAL->fd,LOCAL->buf + NTKLUDGEOFFSET,
	       HDRSIZE - NTKLUDGEOFFSET) > 0) break;
    mm_notify (stream,strerror (errno),WARN);
    mm_diskerror (stream,errno,T);
  }
}

/* MBX update status string
 * Accepts: MAIL stream
 *	    message number
 *	    flags
 */

void mbx_update_status (MAILSTREAM *stream,unsigned long msgno,long flags)
{
  struct stat sbuf;
  MESSAGECACHE *elt = mail_elt (stream,msgno);
				/* readonly */
  if (stream->rdonly || !elt->valid) mbx_read_flags (stream,elt);
  else {			/* readwrite */
    fstat (LOCAL->fd,&sbuf);	/* get status */
				/* make sure file size is good */
    if (sbuf.st_size < LOCAL->filesize) {
      sprintf (LOCAL->buf,"Mailbox shrank from %lu to %lu in flag update!",
	       (unsigned long) LOCAL->filesize,(unsigned long) sbuf.st_size);
      fatal (LOCAL->buf);
    }
				/* set the seek pointer */
    lseek (LOCAL->fd,(off_t) elt->private.special.offset +
	   elt->private.special.text.size - 24,L_SET);
				/* read the new flags */
    if (read (LOCAL->fd,LOCAL->buf,14) < 0) {
      sprintf (LOCAL->buf,"Unable to read old status: %s",strerror (errno));
      fatal (LOCAL->buf);
    }
    if ((LOCAL->buf[0] != ';') || (LOCAL->buf[13] != '-')) {
      LOCAL->buf[14] = '\0';	/* tie off buffer for error message */
      sprintf (LOCAL->buf+50,"Invalid flags for message %lu (%lu %lu): %s",
	       elt->msgno,elt->private.special.offset,
	       elt->private.special.text.size,(char *) LOCAL->buf);
      fatal (LOCAL->buf+50);
    }
				/* print new flag string */
    sprintf (LOCAL->buf,"%08lx%04x-%08lx",elt->user_flags,(unsigned)
	     (((elt->deleted && flags) ?
	       fEXPUNGED : (strtoul (LOCAL->buf+9,NIL,16)) & fEXPUNGED) +
	      (fSEEN * elt->seen) + (fDELETED * elt->deleted) +
	      (fFLAGGED * elt->flagged) + (fANSWERED * elt->answered) +
	      (fDRAFT * elt->draft) + fOLD),elt->private.uid);
    while (T) {			/* get to that place in the file */
      lseek (LOCAL->fd,(off_t) elt->private.special.offset +
	     elt->private.special.text.size - 23,L_SET);
				/* write new flags and UID */
      if (write (LOCAL->fd,LOCAL->buf,21) > 0) break;
      mm_notify (stream,strerror (errno),WARN);
      mm_diskerror (stream,errno,T);
    }
  }
}

/* MBX locate header for a message
 * Accepts: MAIL stream
 *	    message number
 *	    pointer to returned header size
 *	    pointer to possible returned header
 * Returns: position of header in file
 */

#define HDRBUFLEN 16384		/* good enough for most headers */
#define SLOP 4			/* CR LF CR LF */

unsigned long mbx_hdrpos (MAILSTREAM *stream,unsigned long msgno,
			  unsigned long *size,char **hdr)
{
  unsigned long siz,done;
  long i;
  unsigned char *s,*t,*te;
  MESSAGECACHE *elt = mail_elt (stream,msgno);
  unsigned long ret = elt->private.special.offset +
    elt->private.special.text.size;
  if (hdr) *hdr = NIL;		/* assume no header returned */
				/* is header size known? */ 
  if (*size = elt->private.msg.header.text.size) return ret;
				/* paranoia check */
  if (LOCAL->buflen < (HDRBUFLEN + SLOP))
    fatal ("LOCAL->buf smaller than HDRBUFLEN");
  lseek (LOCAL->fd,ret,L_SET);	/* get to header position */
				/* read HDRBUFLEN chunks with 4 byte slop */
  for (done = siz = 0, s = LOCAL->buf;
       (i = min ((long) (elt->rfc822_size - done),(long) HDRBUFLEN)) &&
       (read (LOCAL->fd,s,i) == i);
       done += i, siz += (t - LOCAL->buf) - SLOP, s = LOCAL->buf + SLOP) {
    te = (t = s + i) - 12;	/* calculate end of fast scan */
				/* fast scan for CR */
    for (s = LOCAL->buf; s < te;)
      if (((*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015') ||
	   (*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015') ||
	   (*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015') ||
	   (*s++ == '\015') || (*s++ == '\015') || (*s++ == '\015')) &&
	  (*s == '\012') && (*++s == '\015') && (*++s == '\012')) {
	*size = elt->private.msg.header.text.size = siz + (++s - LOCAL->buf);
	if (hdr) *hdr = LOCAL->buf;
	return ret;
      }
    for (te = t - 3; (s < te);)	/* final character-at-a-time scan */
      if ((*s++ == '\015') && (*s == '\012') && (*++s == '\015') &&
	  (*++s == '\012')) {
	*size = elt->private.msg.header.text.size = siz + (++s - LOCAL->buf);
	if (hdr) *hdr = LOCAL->buf;
	return ret;
      }
    if (i <= SLOP) break;	/* end of data */
				/* slide over last 4 bytes */
    memmove (LOCAL->buf,t - SLOP,SLOP);
    hdr = NIL;			/* can't return header this way */
  }
				/* not found: header consumes entire message */
  elt->private.msg.header.text.size = *size = elt->rfc822_size;
  if (hdr) *hdr = LOCAL->buf;	/* possibly return header too */
  return ret;
}

/* MBX mail rewrite mailbox
 * Accepts: MAIL stream
 *	    pointer to return reclaimed size
 *	    flags (0 = no expunge, 1 = expunge deleted, -1 = expunge sequence)
 * Returns: number of expunged messages
 */

unsigned long mbx_rewrite (MAILSTREAM *stream,unsigned long *reclaimed,
			   long flags)
{
  struct utimbuf times;
  struct stat sbuf;
  off_t pos,ppos;
  int ld;
  unsigned long i,j,k,m,delta;
  unsigned long n = *reclaimed = 0;
  unsigned long recent = 0;
  char lock[MAILTMPLEN];
  MESSAGECACHE *elt;
				/* get parse/append permission */
  if ((ld = lockname (lock,stream->mailbox,LOCK_EX)) < 0) {
    mm_log ("Unable to lock expunge mailbox",ERROR);
    return 0;
  }
  fstat (LOCAL->fd,&sbuf);	/* get current write time */
  if (LOCAL->filetime && !LOCAL->flagcheck &&
      (LOCAL->filetime < sbuf.st_mtime)) LOCAL->flagcheck = T;
  if (!mbx_parse (stream)) {	/* make sure see any newly-arrived messages */
    unlockfd (ld,lock);		/* failed?? */
    return 0;
  }
  if (LOCAL->flagcheck) {	/* sweep flags if need flagcheck */
    LOCAL->filetime = sbuf.st_mtime;
    for (i = 1; i <= stream->nmsgs; ++i) mbx_elt (stream,i,NIL);
    LOCAL->flagcheck = NIL;
  }

				/* get exclusive access */
  if (!flock (LOCAL->fd,LOCK_EX|LOCK_NB)) {
    mm_critical (stream);	/* go critical */
    for (i = 1,delta = 0,pos = ppos = HDRSIZE; i <= stream->nmsgs; ) {
				/* note if message not at predicted location */
      if (m = (elt = mbx_elt (stream,i,NIL))->private.special.offset - ppos) {
	ppos = elt->private.special.offset;
	*reclaimed += m;	/* note reclaimed message space */
	delta += m;		/* and as expunge delta  */
      }
				/* number of bytes to smash or preserve */
      ppos += (k = elt->private.special.text.size + elt->rfc822_size);
				/* if need to expunge this message*/
      if (flags && elt->deleted && ((flags > 0) || elt->sequence)) {
	delta += k;		/* number of bytes to delete */
	mail_expunged(stream,i);/* notify upper levels */
	n++;			/* count up one more expunged message */
      }
      else {			/* preserved message */
	i++;			/* count this message */
	if (elt->recent) ++recent;
	if (delta) {		/* moved, note first byte to preserve */
	  j = elt->private.special.offset;
	  do {			/* read from source position */
	    m = min (k,LOCAL->buflen);
	    lseek (LOCAL->fd,j,L_SET);
	    read (LOCAL->fd,LOCAL->buf,m);
	    pos = j - delta;	/* write to destination position */
	    while (T) {
	      lseek (LOCAL->fd,pos,L_SET);
	      if (write (LOCAL->fd,LOCAL->buf,m) > 0) break;
	      mm_notify (stream,strerror (errno),WARN);
	      mm_diskerror (stream,errno,T);
	    }
	    pos += m;		/* new position */
	    j += m;		/* next chunk, perhaps */
	  } while (k -= m);	/* until done */
				/* note the new address of this text */
	  elt->private.special.offset -= delta;
	}
				/* preserved but no deleted messages yet */
	else pos = elt->private.special.offset + k;
      }
    }
				/* deltaed file size match position? */
    if (m = (LOCAL->filesize -= delta) - pos) {
      *reclaimed += m;		/* probably an fEXPUNGED msg */
      LOCAL->filesize = pos;	/* set correct size */
    }
				/* truncate file after last message */
    ftruncate (LOCAL->fd,LOCAL->filesize);
    fsync (LOCAL->fd);		/* force disk update */
    mm_nocritical (stream);	/* release critical */
    flock (LOCAL->fd,LOCK_SH);	/* allow sharers again */
  }

  else {			/* can't get exclusive */
    flock (LOCAL->fd,LOCK_SH);	/* recover previous shared mailbox lock */
				/* do hide-expunge when shared */
    if (flags) for (i = 1; i <= stream->nmsgs; ) {
      if (elt = mbx_elt (stream,i,T)) {
				/* make the message invisible */
	if (elt->deleted && ((flags > 0) || elt->sequence)) {
	  mbx_update_status (stream,elt->msgno,LONGT);
				/* notify upper levels */
	  mail_expunged (stream,i);
	  n++;			/* count up one more expunged message */
	}
	else {
	  i++;			/* preserved message */
	  if (elt->recent) ++recent;
	}
      }
      else n++;			/* count up one more expunged message */
    }
    fsync (LOCAL->fd);		/* force disk update */
  }
  fstat (LOCAL->fd,&sbuf);	/* get new write time */
  times.modtime = LOCAL->filetime = sbuf.st_mtime;
  times.actime = time (0);	/* reset atime to now */
  utime (stream->mailbox,&times);
  unlockfd (ld,lock);		/* release exclusive parse/append permission */
				/* notify upper level of new mailbox size */
  mail_exists (stream,stream->nmsgs);
  mail_recent (stream,recent);
  return n;			/* return number of expunged messages */
}

/* MBX mail lock for flag updating
 * Accepts: stream
 * Returns: T if successful, NIL if failure
 */

long mbx_flaglock (MAILSTREAM *stream)
{
  struct stat sbuf;
  unsigned long i;
  int ld;
  char lock[MAILTMPLEN];
				/* no-op if readonly or already locked */
  if (!stream->rdonly && LOCAL && (LOCAL->fd >= 0) && (LOCAL->ld < 0)) {
				/* lock now */
    if ((ld = lockname (lock,stream->mailbox,LOCK_EX)) < 0) return NIL;
    if (!LOCAL->flagcheck) {	/* don't do this if flagcheck already needed */
      if (LOCAL->filetime) {	/* know previous time? */
	fstat (LOCAL->fd,&sbuf);/* get current write time */
	if (LOCAL->filetime < sbuf.st_mtime) LOCAL->flagcheck = T;
	LOCAL->filetime = 0;	/* don't do this test for any other messages */
      }
      if (!mbx_parse (stream)) {/* parse mailbox */
	unlockfd (ld,lock);	/* shouldn't happen */
	return NIL;
      }
      if (LOCAL->flagcheck)	/* invalidate cache if flagcheck */
	for (i = 1; i <= stream->nmsgs; ++i) mail_elt (stream,i)->valid = NIL;
    }
    LOCAL->ld = ld;		/* copy to stream for subsequent calls */
    memcpy (LOCAL->lock,lock,MAILTMPLEN);
  }
  return LONGT;
}

Youez - 2016 - github.com/yon3zu
LinuXploit