Mercurial > dovecot > original-hg > dovecot-1.2
view src/plugins/expire/expire-plugin.c @ 7086:7ed926ed7aa4 HEAD
Updated copyright notices to include year 2008.
author | Timo Sirainen <tss@iki.fi> |
---|---|
date | Tue, 01 Jan 2008 22:05:21 +0200 |
parents | 414c9d631a81 |
children | e6693a0ec8e1 |
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/* Copyright (c) 2006-2008 Dovecot authors, see the included COPYING file */ #include "lib.h" #include "ioloop.h" #include "array.h" #include "dict.h" #include "mail-namespace.h" #include "index-mail.h" #include "index-storage.h" #include "expire-env.h" #include "expire-plugin.h" #include <stdlib.h> #define EXPIRE_CONTEXT(obj) \ MODULE_CONTEXT(obj, expire_storage_module) #define EXPIRE_MAIL_CONTEXT(obj) \ MODULE_CONTEXT(obj, expire_mail_module) struct expire { struct dict *db; struct expire_env *env; const char *username; void (*next_hook_mail_storage_created)(struct mail_storage *storage); }; struct expire_mailbox { union mailbox_module_context module_ctx; time_t expire_secs; }; struct expire_transaction_context { union mailbox_transaction_module_context module_ctx; struct mail *mail; time_t first_save_time; unsigned int first_expunged:1; }; const char *expire_plugin_version = PACKAGE_VERSION; static struct expire expire; static MODULE_CONTEXT_DEFINE_INIT(expire_storage_module, &mail_storage_module_register); static MODULE_CONTEXT_DEFINE_INIT(expire_mail_module, &mail_module_register); static struct mailbox_transaction_context * expire_mailbox_transaction_begin(struct mailbox *box, enum mailbox_transaction_flags flags) { struct expire_mailbox *xpr_box = EXPIRE_CONTEXT(box); struct mailbox_transaction_context *t; struct expire_transaction_context *xt; t = xpr_box->module_ctx.super.transaction_begin(box, flags); xt = i_new(struct expire_transaction_context, 1); xt->mail = mail_alloc(t, 0, NULL); MODULE_CONTEXT_SET(t, expire_storage_module, xt); return t; } static void first_nonexpunged_timestamp(struct mailbox_transaction_context *_t, time_t *stamp_r) { struct index_transaction_context *t = (struct index_transaction_context *)_t; struct expire_transaction_context *xt = EXPIRE_CONTEXT(_t); struct mail_index_view *view = t->trans_view; const struct mail_index_header *hdr; uint32_t seq; /* find the first non-expunged mail. we're here because the first mail was expunged, so don't bother checking it. */ hdr = mail_index_get_header(view); for (seq = 2; seq <= hdr->messages_count; seq++) { if (!mail_index_is_expunged(view, seq)) { mail_set_seq(xt->mail, seq); if (mail_get_save_date(xt->mail, stamp_r) == 0) return; } } /* everything expunged */ *stamp_r = 0; } static int expire_mailbox_transaction_commit(struct mailbox_transaction_context *t, uint32_t *uid_validity_r, uint32_t *first_saved_uid_r, uint32_t *last_saved_uid_r) { struct expire_mailbox *xpr_box = EXPIRE_CONTEXT(t->box); struct expire_transaction_context *xt = EXPIRE_CONTEXT(t); const char *mailbox_name = t->box->name; time_t new_stamp; bool update_dict = FALSE; int ret; if (xt->first_expunged) { /* first mail expunged. dict needs updating. */ first_nonexpunged_timestamp(t, &new_stamp); update_dict = TRUE; } mail_free(&xt->mail); if (xpr_box->module_ctx.super. transaction_commit(t, uid_validity_r, first_saved_uid_r, last_saved_uid_r) < 0) { i_free(xt); return -1; } T_FRAME_BEGIN { const char *key, *value; key = t_strconcat(DICT_PATH_SHARED, expire.username, "/", mailbox_name, NULL); if (!xt->first_expunged) { /* saved new mails. dict needs to be updated only if this is the first mail in the database */ ret = dict_lookup(expire.db, pool_datastack_create(), key, &value); update_dict = ret == 0 || strtoul(value, NULL, 10) == 0; new_stamp = xt->first_save_time; } if (update_dict) { struct dict_transaction_context *dctx; new_stamp += xpr_box->expire_secs; dctx = dict_transaction_begin(expire.db); dict_set(dctx, key, dec2str(new_stamp)); dict_transaction_commit(dctx); } } T_FRAME_END; i_free(xt); return 0; } static void expire_mailbox_transaction_rollback(struct mailbox_transaction_context *t) { struct expire_mailbox *xpr_box = EXPIRE_CONTEXT(t->box); struct expire_transaction_context *xt = EXPIRE_CONTEXT(t); mail_free(&xt->mail); xpr_box->module_ctx.super.transaction_rollback(t); i_free(xt); } static void expire_mail_expunge(struct mail *_mail) { struct mail_private *mail = (struct mail_private *)_mail; union mail_module_context *xpr_mail = EXPIRE_MAIL_CONTEXT(mail); struct expire_transaction_context *xt = EXPIRE_CONTEXT(_mail->transaction); if (_mail->seq == 1) { /* first mail expunged, database needs to be updated */ xt->first_expunged = TRUE; } xpr_mail->super.expunge(_mail); } static struct mail * expire_mail_alloc(struct mailbox_transaction_context *t, enum mail_fetch_field wanted_fields, struct mailbox_header_lookup_ctx *wanted_headers) { struct expire_mailbox *xpr_box = EXPIRE_CONTEXT(t->box); union mail_module_context *xpr_mail; struct mail *_mail; struct mail_private *mail; _mail = xpr_box->module_ctx.super. mail_alloc(t, wanted_fields, wanted_headers); mail = (struct mail_private *)_mail; xpr_mail = p_new(mail->pool, union mail_module_context, 1); xpr_mail->super = mail->v; mail->v.expunge = expire_mail_expunge; MODULE_CONTEXT_SET_SELF(mail, expire_mail_module, xpr_mail); return _mail; } static void mail_set_save_time(struct mailbox_transaction_context *t, uint32_t seq) { struct expire_transaction_context *xt = EXPIRE_CONTEXT(t); struct index_transaction_context *it = (struct index_transaction_context *)t; if (xt->first_save_time == 0) xt->first_save_time = ioloop_time; mail_cache_add(it->cache_trans, seq, MAIL_CACHE_SAVE_DATE, &ioloop_time, sizeof(ioloop_time)); } static int expire_save_init(struct mailbox_transaction_context *t, enum mail_flags flags, struct mail_keywords *keywords, time_t received_date, int timezone_offset, const char *from_envelope, struct istream *input, struct mail *dest_mail, struct mail_save_context **ctx_r) { struct expire_transaction_context *xt = EXPIRE_CONTEXT(t); struct expire_mailbox *xpr_box = EXPIRE_CONTEXT(t->box); int ret; if (dest_mail == NULL) dest_mail = xt->mail; ret = xpr_box->module_ctx.super. save_init(t, flags, keywords, received_date, timezone_offset, from_envelope, input, dest_mail, ctx_r); if (ret >= 0) mail_set_save_time(t, dest_mail->seq); return ret; } static int expire_copy(struct mailbox_transaction_context *t, struct mail *mail, enum mail_flags flags, struct mail_keywords *keywords, struct mail *dest_mail) { struct expire_transaction_context *xt = EXPIRE_CONTEXT(t); struct expire_mailbox *xpr_box = EXPIRE_CONTEXT(t->box); int ret; if (dest_mail == NULL) dest_mail = xt->mail; ret = xpr_box->module_ctx.super. copy(t, mail, flags, keywords, dest_mail); if (ret >= 0) mail_set_save_time(t, dest_mail->seq); return ret; } static void mailbox_expire_hook(struct mailbox *box, time_t expire_secs) { struct expire_mailbox *xpr_box; xpr_box = p_new(box->pool, struct expire_mailbox, 1); xpr_box->module_ctx.super = box->v; box->v.transaction_begin = expire_mailbox_transaction_begin; box->v.transaction_commit = expire_mailbox_transaction_commit; box->v.transaction_rollback = expire_mailbox_transaction_rollback; box->v.mail_alloc = expire_mail_alloc; box->v.save_init = expire_save_init; box->v.copy = expire_copy; xpr_box->expire_secs = expire_secs; MODULE_CONTEXT_SET(box, expire_storage_module, xpr_box); } static struct mailbox * expire_mailbox_open(struct mail_storage *storage, const char *name, struct istream *input, enum mailbox_open_flags flags) { union mail_storage_module_context *xpr_storage = EXPIRE_CONTEXT(storage); struct mailbox *box; const struct expire_box *expire_box; const char *full_name; box = xpr_storage->super.mailbox_open(storage, name, input, flags); if (box != NULL) { full_name = t_strconcat(storage->ns->prefix, name, NULL); expire_box = expire_box_find(expire.env, full_name); if (expire_box != NULL) mailbox_expire_hook(box, expire_box->expire_secs); } return box; } static void expire_mail_storage_created(struct mail_storage *storage) { union mail_storage_module_context *xpr_storage; if (expire.next_hook_mail_storage_created != NULL) expire.next_hook_mail_storage_created(storage); xpr_storage = p_new(storage->pool, union mail_storage_module_context, 1); xpr_storage->super = storage->v; storage->v.mailbox_open = expire_mailbox_open; MODULE_CONTEXT_SET_SELF(storage, expire_storage_module, xpr_storage); } void expire_plugin_init(void) { const char *env, *dict_uri; env = getenv("EXPIRE"); if (env != NULL) { dict_uri = getenv("EXPIRE_DICT"); if (dict_uri == NULL) i_fatal("expire plugin: expire_dict setting missing"); expire.env = expire_env_init(env); expire.db = dict_init(dict_uri, DICT_DATA_TYPE_UINT32, NULL); expire.username = getenv("USER"); expire.next_hook_mail_storage_created = hook_mail_storage_created; hook_mail_storage_created = expire_mail_storage_created; } } void expire_plugin_deinit(void) { if (expire.db != NULL) { hook_mail_storage_created = expire.next_hook_mail_storage_created; dict_deinit(&expire.db); expire_env_deinit(expire.env); } }