mbox-mail.c revision fe6c1556d3529a6376d4cbb3766c34aebde0de99
/* Copyright (C) 2003-2006 Timo Sirainen */
#include "lib.h"
#include "ioloop.h"
#include "istream.h"
#include "index-mail.h"
#include "mbox-storage.h"
#include "mbox-file.h"
#include "mbox-lock.h"
#include "mbox-sync-private.h"
#include "istream-raw-mbox.h"
#include "istream-header-filter.h"
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
static void mbox_prepare_resync(struct index_mail *mail)
{
struct mbox_transaction_context *t =
(struct mbox_transaction_context *)mail->trans;
struct mbox_mailbox *mbox = (struct mbox_mailbox *)mail->ibox;
if (mbox->mbox_lock_type == F_RDLCK) {
if (mbox->mbox_lock_id == t->mbox_lock_id)
t->mbox_lock_id = 0;
(void)mbox_unlock(mbox, mbox->mbox_lock_id);
mbox->mbox_lock_id = 0;
i_assert(mbox->mbox_lock_type == F_UNLCK);
}
}
static int mbox_mail_seek(struct index_mail *mail)
{
struct mbox_transaction_context *t =
(struct mbox_transaction_context *)mail->trans;
struct mbox_mailbox *mbox = (struct mbox_mailbox *)mail->ibox;
enum mbox_sync_flags sync_flags = 0;
int ret, try;
bool deleted;
if (mail->mail.mail.expunged)
return 0;
for (try = 0; try < 2; try++) {
if (mbox->mbox_lock_type == F_UNLCK) {
sync_flags |= MBOX_SYNC_LOCK_READING;
if (mbox_sync(mbox, sync_flags) < 0)
return -1;
/* refresh index file after mbox has been locked to
make sure we get only up-to-date mbox offsets. */
if (mail_index_refresh(mbox->ibox.index) < 0) {
mail_storage_set_index_error(&mbox->ibox);
return -1;
}
i_assert(mbox->mbox_lock_type != F_UNLCK);
t->mbox_lock_id = mbox->mbox_lock_id;
} else if ((sync_flags & MBOX_SYNC_FORCE_SYNC) != 0) {
/* dirty offsets are broken and mbox is write-locked.
sync it to update offsets. */
if (mbox_sync(mbox, sync_flags) < 0)
return -1;
}
if (mbox_file_open_stream(mbox) < 0)
return -1;
ret = mbox_file_seek(mbox, mail->trans->trans_view,
mail->mail.mail.seq, &deleted);
if (ret > 0) {
/* success */
break;
}
if (ret < 0) {
if (deleted) {
mail->mail.mail.expunged = TRUE;
return 0;
}
return -1;
}
/* we'll need to re-sync it completely */
mbox_prepare_resync(mail);
sync_flags |= MBOX_SYNC_UNDIRTY | MBOX_SYNC_FORCE_SYNC;
}
if (ret == 0) {
mail_storage_set_critical(STORAGE(mbox->storage),
"Losing sync for mail uid=%u in mbox file %s",
mail->mail.mail.uid, mbox->path);
}
return 1;
}
static time_t mbox_mail_get_received_date(struct mail *_mail)
{
struct index_mail *mail = (struct index_mail *)_mail;
struct index_mail_data *data = &mail->data;
struct mbox_mailbox *mbox = (struct mbox_mailbox *)mail->ibox;
uint32_t t;
(void)index_mail_get_received_date(_mail);
if (data->received_date != (time_t)-1)
return data->received_date;
if (mbox_mail_seek(mail) <= 0)
return (time_t)-1;
data->received_date =
istream_raw_mbox_get_received_time(mbox->mbox_stream);
if (data->received_date == (time_t)-1) {
/* it's broken and conflicts with our "not found"
return value. change it. */
data->received_date = 0;
}
t = data->received_date;
index_mail_cache_add(mail, MAIL_CACHE_RECEIVED_DATE, &t, sizeof(t));
return data->received_date;
}
static time_t mbox_mail_get_save_date(struct mail *_mail)
{
struct index_mail *mail = (struct index_mail *)_mail;
struct index_mail_data *data = &mail->data;
(void)index_mail_get_save_date(_mail);
if (data->save_date != (time_t)-1)
return data->save_date;
/* no way to know this. save the current time into cache and use
that from now on. this works only as long as the index files
are permanent */
data->save_date = ioloop_time;
index_mail_cache_add(mail, MAIL_CACHE_SAVE_DATE,
&data->save_date, sizeof(data->save_date));
return data->save_date;
}
static const char *
mbox_mail_get_special(struct mail *_mail, enum mail_fetch_field field)
{
#define EMPTY_MD5_SUM "00000000000000000000000000000000"
struct index_mail *mail = (struct index_mail *)_mail;
struct mbox_mailbox *mbox = (struct mbox_mailbox *)mail->ibox;
const char *value;
switch (field) {
case MAIL_FETCH_FROM_ENVELOPE:
if (mbox_mail_seek(mail) <= 0)
return NULL;
return istream_raw_mbox_get_sender(mbox->mbox_stream);
case MAIL_FETCH_HEADER_MD5:
value = index_mail_get_special(_mail, field);
if (value != NULL && strcmp(value, EMPTY_MD5_SUM) != 0)
return value;
/* i guess in theory the EMPTY_MD5_SUM is valid and can happen,
but it's almost guaranteed that it means the MD5 sum is
missing. recalculate it. */
mbox->mbox_save_md5 = TRUE;
mbox_prepare_resync(mail);
if (mbox_sync(mbox, MBOX_SYNC_FORCE_SYNC) < 0)
return NULL;
break;
default:
break;
}
return index_mail_get_special(_mail, field);
}
static uoff_t mbox_mail_get_physical_size(struct mail *_mail)
{
struct index_mail *mail = (struct index_mail *)_mail;
struct index_mail_data *data = &mail->data;
struct mbox_mailbox *mbox = (struct mbox_mailbox *)mail->ibox;
struct istream *stream;
uoff_t hdr_offset, body_offset, body_size;
if (mbox_mail_seek(mail) <= 0)
return (uoff_t)-1;
/* our header size varies, so don't do any caching */
stream = mbox->mbox_stream;
hdr_offset = istream_raw_mbox_get_header_offset(stream);
body_offset = istream_raw_mbox_get_body_offset(stream);
if (body_offset == (uoff_t)-1)
return (uoff_t)-1;
body_size = istream_raw_mbox_get_body_size(stream, (uoff_t)-1);
data->physical_size = (body_offset - hdr_offset) + body_size;
return data->physical_size;
}
static struct istream *mbox_mail_get_stream(struct mail *_mail,
struct message_size *hdr_size,
struct message_size *body_size)
{
struct index_mail *mail = (struct index_mail *)_mail;
struct index_mail_data *data = &mail->data;
struct mbox_mailbox *mbox = (struct mbox_mailbox *)mail->ibox;
struct istream *raw_stream;
uoff_t offset;
if (data->stream == NULL) {
if (mbox_mail_seek(mail) <= 0)
return NULL;
raw_stream = mbox->mbox_stream;
offset = istream_raw_mbox_get_header_offset(raw_stream);
raw_stream = i_stream_create_limit(default_pool, raw_stream,
offset, (uoff_t)-1);
data->stream =
i_stream_create_header_filter(raw_stream,
HEADER_FILTER_EXCLUDE,
mbox_hide_headers, mbox_hide_headers_count,
null_header_filter_callback, NULL);
i_stream_unref(&raw_stream);
}
return index_mail_init_stream(mail, hdr_size, body_size);
}
struct mail_vfuncs mbox_mail_vfuncs = {
index_mail_free,
index_mail_set_seq,
index_mail_set_uid,
index_mail_get_flags,
index_mail_get_keywords,
index_mail_get_parts,
index_mail_get_date,
mbox_mail_get_received_date,
mbox_mail_get_save_date,
index_mail_get_virtual_size,
mbox_mail_get_physical_size,
index_mail_get_first_header,
index_mail_get_headers,
index_mail_get_header_stream,
mbox_mail_get_stream,
mbox_mail_get_special,
index_mail_update_flags,
index_mail_update_keywords,
index_mail_expunge
};