static int
mail_transaction_log_file_insert_read(struct mail_transaction_log_file *file,
uoff_t offset)
{
void *data;
size_t size;
ssize_t ret;
size = file->buffer_offset - offset;
buffer_copy(file->buffer, size, file->buffer, 0, (size_t)-1);
data = buffer_get_space_unsafe(file->buffer, 0, size);
ret = pread_full(file->fd, data, size, offset);
if (ret > 0) {
/* success */
file->buffer_offset -= size;
return 1;
}
/* failure. don't leave ourself to inconsistent state */
buffer_copy(file->buffer, 0, file->buffer, size, (size_t)-1);
buffer_set_used_size(file->buffer, file->buffer->used - size);
if (ret == 0) {
mail_transaction_log_file_set_corrupted(file, "file shrank");
return 0;
} else if (errno == ESTALE) {
/* log file was deleted in NFS server, fail silently */
return 0;
} else {
log_file_set_syscall_error(file, "pread()");
return -1;
}
}
static int squat_uidlist_map(struct squat_uidlist *uidlist)
{
const struct squat_uidlist_file_header *mmap_hdr = uidlist->mmap_base;
int ret;
if (mmap_hdr != NULL && !uidlist->building &&
uidlist->hdr.block_list_offset == mmap_hdr->block_list_offset) {
/* file hasn't changed */
return 1;
}
if ((uidlist->trie->flags & SQUAT_INDEX_FLAG_MMAP_DISABLE) == 0) {
if (mmap_hdr == NULL || uidlist->building ||
uidlist->mmap_size < mmap_hdr->used_file_size) {
if (squat_uidlist_mmap(uidlist) < 0)
return -1;
}
if (!uidlist->building) {
memcpy(&uidlist->hdr, uidlist->mmap_base,
sizeof(uidlist->hdr));
}
} else if (uidlist->building) {
/* we want to update blocks mapping, but using the header
in memory */
} else {
ret = pread_full(uidlist->fd, &uidlist->hdr,
sizeof(uidlist->hdr), 0);
if (ret <= 0) {
if (ret < 0) {
i_error("pread(%s) failed: %m", uidlist->path);
return -1;
}
i_error("Corrupted %s: File too small", uidlist->path);
return 0;
}
uidlist->data = NULL;
uidlist->data_size = 0;
}
if (uidlist->file_cache == NULL &&
(uidlist->trie->flags & SQUAT_INDEX_FLAG_MMAP_DISABLE) != 0)
uidlist->file_cache = file_cache_new(uidlist->fd);
return squat_uidlist_map_header(uidlist);
}
static int i_stream_seekable_write_failed(struct seekable_istream *sstream)
{
struct istream_private *stream = &sstream->istream;
void *data;
i_assert(sstream->fd != -1);
stream->max_buffer_size = (size_t)-1;
data = i_stream_alloc(stream, sstream->write_peak);
if (pread_full(sstream->fd, data, sstream->write_peak, 0) < 0) {
i_error("istream-seekable: read(%s) failed: %m", sstream->temp_path);
memarea_unref(&stream->memarea);
return -1;
}
i_stream_destroy(&sstream->fd_input);
i_close_fd(&sstream->fd);
i_free_and_null(sstream->temp_path);
return 0;
}
static int i_stream_seekable_write_failed(struct seekable_istream *sstream)
{
struct istream_private *stream = &sstream->istream;
void *data;
i_assert(sstream->membuf == NULL);
sstream->membuf =
buffer_create_dynamic(default_pool, sstream->write_peak);
data = buffer_append_space_unsafe(sstream->membuf, sstream->write_peak);
if (pread_full(sstream->fd, data, sstream->write_peak, 0) < 0) {
i_error("istream-seekable: read(%s) failed: %m", sstream->temp_path);
buffer_free(&sstream->membuf);
return -1;
}
i_stream_destroy(&sstream->fd_input);
i_close_fd(&sstream->fd);
stream->max_buffer_size = (size_t)-1;
i_free_and_null(sstream->temp_path);
return 0;
}
