Mercurial > dovecot > core-2.2
view src/lib-storage/index/index-status.c @ 820:9bcd3cc068a5 HEAD
Better checking for corrupted first_unseen_uid_lowwater.
author | Timo Sirainen <tss@iki.fi> |
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date | Sat, 21 Dec 2002 12:59:23 +0200 |
parents | cecf76430cac |
children | fd8888f6f037 |
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/* Copyright (C) 2002 Timo Sirainen */ #include "lib.h" #include "mail-custom-flags.h" #include "mail-index-util.h" #include "index-storage.h" static unsigned int get_first_unseen_seq(MailIndex *index) { MailIndexHeader *hdr; MailIndexRecord *rec; unsigned int seq, lowwater_uid; hdr = mail_index_get_header(index); if (hdr->seen_messages_count == hdr->messages_count) { /* no unseen messages */ return 0; } lowwater_uid = hdr->first_unseen_uid_lowwater; if (lowwater_uid == hdr->next_uid) { /* no unseen messages */ rec = NULL; } else if (lowwater_uid != 0) { /* begin scanning from the low water mark */ rec = index->lookup_uid_range(index, lowwater_uid, hdr->next_uid - 1, &seq); } else { /* begin scanning from the beginning */ rec = index->lookup(index, 1); seq = 1; } while (rec != NULL && (rec->msg_flags & MAIL_SEEN)) { rec = index->next(index, rec); seq++; } if (rec == NULL) { index_set_corrupted(index, "No unseen messages found with " "first_unseen_uid_lowwater %u, " "seen_messages_count %u, messages_count %u", lowwater_uid, hdr->seen_messages_count, hdr->messages_count); return 0; } if (rec->uid != lowwater_uid) { /* update the low water mark if we can get exclusive lock immediately. */ if (index->try_lock(index, MAIL_LOCK_EXCLUSIVE)) hdr->first_unseen_uid_lowwater = rec->uid; } return seq; } static void get_custom_flags(MailCustomFlags *mcf, MailboxStatus *status) { const char **flags; unsigned int i; status->custom_flags_count = MAIL_CUSTOM_FLAGS_COUNT; status->custom_flags = t_new(const char *, MAIL_CUSTOM_FLAGS_COUNT); flags = mail_custom_flags_list_get(mcf); for (i = 0; i < MAIL_CUSTOM_FLAGS_COUNT; i++) status->custom_flags[i] = t_strdup(flags[i]); } int index_storage_get_status(Mailbox *box, MailboxStatusItems items, MailboxStatus *status) { IndexMailbox *ibox = (IndexMailbox *) box; MailIndexHeader *hdr; memset(status, 0, sizeof(MailboxStatus)); /* if we're doing STATUS for selected mailbox, we have to sync it first or STATUS reply may give different data */ if (!index_storage_sync_and_lock(ibox, TRUE, MAIL_LOCK_UNLOCK)) return FALSE; if (!index_storage_sync_modifylog(ibox, FALSE)) { (void)index_storage_lock(ibox, MAIL_LOCK_UNLOCK); return FALSE; } /* we can get most of the status items without any trouble */ hdr = mail_index_get_header(ibox->index); status->messages = hdr->messages_count; status->unseen = hdr->messages_count - hdr->seen_messages_count; status->uidvalidity = hdr->uid_validity; status->uidnext = hdr->next_uid; status->diskspace_full = ibox->index->nodiskspace; if (items & STATUS_FIRST_UNSEEN_SEQ) { status->first_unseen_seq = get_first_unseen_seq(ibox->index); } if (items & STATUS_RECENT) status->recent = index_storage_get_recent_count(ibox->index); if (items & STATUS_CUSTOM_FLAGS) get_custom_flags(ibox->index->custom_flags, status); if (!index_storage_lock(ibox, MAIL_LOCK_UNLOCK)) return FALSE; return TRUE; }