/* * libEtPan! -- a mail stuff library * * Copyright (C) 2001, 2002 - DINH Viet Hoa * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the libEtPan! project nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * $Id$ */ #include "mhdriver_message.h" #include "mailmessage_tools.h" #include "mhdriver_tools.h" #include "mhdriver_cached.h" #include "mailmh.h" #include "generic_cache.h" #include "mail_cache_db.h" #include <unistd.h> #include <sys/mman.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <string.h> #include <stdlib.h> static int mh_prefetch(mailmessage * msg_info); static void mh_prefetch_free(struct generic_message_t * msg); static int mh_initialize(mailmessage * msg_info); static int mh_fetch_size(mailmessage * msg_info, size_t * result); static int mh_get_flags(mailmessage * msg_info, struct mail_flags ** result); static void mh_uninitialize(mailmessage * msg_info); static void mh_flush(mailmessage * msg_info); static void mh_check(mailmessage * msg_info); static int mh_fetch_header(mailmessage * msg_info, char ** result, size_t * result_len); static mailmessage_driver local_mh_cached_message_driver = { .msg_name = "mh-cached", .msg_initialize = mh_initialize, .msg_uninitialize = mh_uninitialize, .msg_flush = mh_flush, .msg_check = mh_check, .msg_fetch_result_free = mailmessage_generic_fetch_result_free, .msg_fetch = mailmessage_generic_fetch, .msg_fetch_header = mh_fetch_header, .msg_fetch_body = mailmessage_generic_fetch_body, .msg_fetch_size = mh_fetch_size, .msg_get_bodystructure = mailmessage_generic_get_bodystructure, .msg_fetch_section = mailmessage_generic_fetch_section, .msg_fetch_section_header = mailmessage_generic_fetch_section_header, .msg_fetch_section_mime = mailmessage_generic_fetch_section_mime, .msg_fetch_section_body = mailmessage_generic_fetch_section_body, .msg_fetch_envelope = mailmessage_generic_fetch_envelope, .msg_get_flags = mh_get_flags, }; mailmessage_driver * mh_cached_message_driver = &local_mh_cached_message_driver; static inline struct mh_cached_session_state_data * get_cached_session_data(mailmessage * msg) { return msg->msg_session->sess_data; } static inline mailsession * get_ancestor_session(mailmessage * msg) { return get_cached_session_data(msg)->mh_ancestor; } static inline struct mh_session_state_data * get_ancestor_session_data(mailmessage * msg) { return get_ancestor_session(msg)->sess_data; } static inline struct mailmh * get_mh_session(mailmessage * msg) { return get_ancestor_session_data(msg)->mh_session; } static inline struct mailmh_folder * get_mh_cur_folder(mailmessage * msg) { return get_ancestor_session_data(msg)->mh_cur_folder; } static int mh_prefetch(mailmessage * msg_info) { struct generic_message_t * msg; int r; char * msg_content; size_t msg_length; r = mhdriver_fetch_message(get_ancestor_session(msg_info), msg_info->msg_index, &msg_content, &msg_length); if (r != MAIL_NO_ERROR) return r; msg = msg_info->msg_data; msg->msg_message = msg_content; msg->msg_length = msg_length; return MAIL_NO_ERROR; } static void mh_prefetch_free(struct generic_message_t * msg) { if (msg->msg_message != NULL) { mmap_string_unref(msg->msg_message); msg->msg_message = NULL; } } static int mh_initialize(mailmessage * msg_info) { struct generic_message_t * msg; int r; char * uid; char static_uid[PATH_MAX]; struct mailmh_msg_info * mh_msg_info; chashdatum key; chashdatum data; struct mailmh_folder * folder; folder = get_mh_cur_folder(msg_info); key.data = &msg_info->msg_index; key.len = sizeof(msg_info->msg_index); r = chash_get(folder->fl_msgs_hash, &key, &data); if (r < 0) return MAIL_ERROR_INVAL; mh_msg_info = data.data; snprintf(static_uid, PATH_MAX, "%u-%lu-%lu", msg_info->msg_index, mh_msg_info->msg_mtime, (unsigned long) mh_msg_info->msg_size); uid = strdup(static_uid); if (uid == NULL) return MAIL_ERROR_MEMORY; r = mailmessage_generic_initialize(msg_info); if (r != MAIL_NO_ERROR) { free(uid); return r; } msg = msg_info->msg_data; msg->msg_prefetch = mh_prefetch; msg->msg_prefetch_free = mh_prefetch_free; msg_info->msg_uid = uid; return MAIL_NO_ERROR; } static void mh_uninitialize(mailmessage * msg_info) { mailmessage_generic_uninitialize(msg_info); } #define FLAGS_NAME "flags.db" static void mh_flush(mailmessage * msg_info) { mailmessage_generic_flush(msg_info); } static void mh_check(mailmessage * msg_info) { int r; if (msg_info->msg_flags != NULL) { r = mail_flags_store_set(get_cached_session_data(msg_info)->mh_flags_store, msg_info); /* ignore errors */ } } static int mh_fetch_size(mailmessage * msg_info, size_t * result) { int r; size_t size; r = mhdriver_fetch_size(get_ancestor_session(msg_info), msg_info->msg_index, &size); if (r != MAIL_NO_ERROR) return r; * result = size; return MAIL_NO_ERROR; } static int mh_get_flags(mailmessage * msg_info, struct mail_flags ** result) { int r; struct mail_flags * flags; struct mail_cache_db * cache_db_flags; char filename_flags[PATH_MAX]; int res; struct mh_cached_session_state_data * cached_data; MMAPString * mmapstr; if (msg_info->msg_flags != NULL) { * result = msg_info->msg_flags; return MAIL_NO_ERROR; } cached_data = get_cached_session_data(msg_info); flags = mail_flags_store_get(cached_data->mh_flags_store, msg_info->msg_index); if (flags == NULL) { if (cached_data->mh_quoted_mb == NULL) { res = MAIL_ERROR_BAD_STATE; goto err; } snprintf(filename_flags, PATH_MAX, "%s/%s/%s", cached_data->mh_flags_directory, cached_data->mh_quoted_mb, FLAGS_NAME); r = mail_cache_db_open_lock(filename_flags, &cache_db_flags); if (r < 0) { res = MAIL_ERROR_MEMORY; goto err; } mmapstr = mmap_string_new(""); if (mmapstr == NULL) { res = MAIL_ERROR_MEMORY; goto close_db_flags; } r = mhdriver_get_cached_flags(cache_db_flags, mmapstr, msg_info->msg_session, msg_info->msg_index, &flags); if (r != MAIL_NO_ERROR) { flags = mail_flags_new_empty(); if (flags == NULL) { res = MAIL_ERROR_MEMORY; goto free_mmapstr; } } mmap_string_free(mmapstr); mail_cache_db_close_unlock(filename_flags, cache_db_flags); } msg_info->msg_flags = flags; * result = flags; return MAIL_NO_ERROR; free_mmapstr: mmap_string_free(mmapstr); close_db_flags: mail_cache_db_close_unlock(filename_flags, cache_db_flags); err: return res; } static int mh_fetch_header(mailmessage * msg_info, char ** result, size_t * result_len) { struct generic_message_t * msg; int r; char * msg_content; size_t msg_length; msg = msg_info->msg_data; if (msg->msg_message != NULL) { return mailmessage_generic_fetch_header(msg_info, result, result_len); } else { r = mhdriver_fetch_header(get_ancestor_session(msg_info), msg_info->msg_index, &msg_content, &msg_length); if (r != MAIL_NO_ERROR) return r; * result = msg_content; * result_len = msg_length; return MAIL_NO_ERROR; } }