# HG changeset patch
# User Timo Sirainen <tss@iki.fi>
# Date 1204604784 -7200
# Node ID 969656b58e7f28c87e2999310ab7281a122ac30b
# Parent  ae8180a4febd798db8cbb0a69f5301891c8ee2a8
Added wildcard support to expire plugin. Added a new expire_altmove setting
which moves mails to alt directory with dbox instead of expunging them. Both
settings can be used simultaneously. Added --test parameter to expire-tool.
Fixed several bugs and did some optimizations.

diff -r ae8180a4febd -r 969656b58e7f src/plugins/expire/Makefile.am
--- a/src/plugins/expire/Makefile.am	Tue Mar 04 06:24:44 2008 +0200
+++ b/src/plugins/expire/Makefile.am	Tue Mar 04 06:26:24 2008 +0200
@@ -4,6 +4,7 @@
 	-I$(top_srcdir)/src/lib \
 	-I$(top_srcdir)/src/lib-dict \
 	-I$(top_srcdir)/src/lib-mail \
+	-I$(top_srcdir)/src/lib-imap \
 	-I$(top_srcdir)/src/lib-index \
 	-I$(top_srcdir)/src/lib-storage \
 	-I$(top_srcdir)/src/lib-storage/index \
diff -r ae8180a4febd -r 969656b58e7f src/plugins/expire/expire-env.c
--- a/src/plugins/expire/expire-env.c	Tue Mar 04 06:24:44 2008 +0200
+++ b/src/plugins/expire/expire-env.c	Tue Mar 04 06:26:24 2008 +0200
@@ -2,42 +2,70 @@
 
 #include "lib.h"
 #include "array.h"
+#include "imap-match.h"
 #include "expire-env.h"
 
 #include <stdlib.h>
 
+enum expire_type {
+	EXPIRE_TYPE_EXPUNGE,
+	EXPIRE_TYPE_ALTMOVE
+};
+
+struct expire_box {
+	const char *pattern;
+	struct imap_match_glob *glob;
+
+	enum expire_type type;
+	unsigned int expire_secs;
+};
+
 struct expire_env {
 	pool_t pool;
 	ARRAY_DEFINE(expire_boxes, struct expire_box);
 };
 
-struct expire_env *expire_env_init(const char *str)
+static void expire_env_parse(struct expire_env *env, const char *str,
+			     enum expire_type type)
 {
-	struct expire_env *env;
 	struct expire_box box;
-	pool_t pool;
 	char *const *names;
 	unsigned int len;
 
-	pool = pool_alloconly_create("Expire pool", 512);
-	env = p_new(pool, struct expire_env, 1);
-	env->pool = pool;
+	if (str == NULL)
+		return;
 
-	names = p_strsplit(pool, str, " ");
+	names = p_strsplit(env->pool, str, " ");
 	len = str_array_length((const char *const *)names);
 
-	p_array_init(&env->expire_boxes, pool, len / 2);
+	p_array_init(&env->expire_boxes, env->pool, len / 2);
 	for (; *names != NULL; names += 2) {
 		if (names[1] == NULL) {
 			i_fatal("expire: Missing expire days for mailbox '%s'",
 				*names);
 		}
 
-		box.name = *names;
-		box.expire_secs = strtoul(names[1], NULL, 10) * 3600 * 24;
+		box.pattern = *names;
+		/* FIXME: hardcoded separator isn't very good */
+		box.glob = imap_match_init(env->pool, box.pattern, TRUE, '/');
+		box.type = type;
+		box.expire_secs = strtoul(names[1], NULL, 10)/* * 3600 * 24*/ * 10;//FIXME
+
 		array_append(&env->expire_boxes, &box, 1);
 	}
+}
 
+struct expire_env *expire_env_init(const char *expunges, const char *altmoves)
+{
+	struct expire_env *env;
+	pool_t pool;
+
+	pool = pool_alloconly_create("Expire pool", 512);
+	env = p_new(pool, struct expire_env, 1);
+	env->pool = pool;
+
+	expire_env_parse(env, expunges, EXPIRE_TYPE_EXPUNGE);
+	expire_env_parse(env, altmoves, EXPIRE_TYPE_ALTMOVE);
 	return env;
 }
 
@@ -46,16 +74,41 @@
 	pool_unref(&env->pool);
 }
 
-const struct expire_box *expire_box_find(struct expire_env *env,
-					 const char *name)
+bool expire_box_find(struct expire_env *env, const char *name,
+		     unsigned int *expunge_secs_r,
+		     unsigned int *altmove_secs_r)
 {
 	const struct expire_box *expire_boxes;
 	unsigned int i, count;
+	unsigned int secs, expunge_min = 0, altmove_min = 0;
 
 	expire_boxes = array_get(&env->expire_boxes, &count);
 	for (i = 0; i < count; i++) {
-		if (strcmp(name, expire_boxes[i].name) == 0)
-			return &expire_boxes[i];
+		if (imap_match(expire_boxes[i].glob, name) == IMAP_MATCH_YES) {
+			secs = expire_boxes[i].expire_secs;
+			i_assert(secs > 0);
+
+			switch (expire_boxes[i].type) {
+			case EXPIRE_TYPE_EXPUNGE:
+				if (expunge_min == 0 || expunge_min > secs)
+					expunge_min = secs;
+				break;
+			case EXPIRE_TYPE_ALTMOVE:
+				if (altmove_min == 0 || altmove_min > secs)
+					altmove_min = secs;
+				break;
+			}
+		}
 	}
-	return NULL;
+	*expunge_secs_r = expunge_min;
+	*altmove_secs_r = altmove_min;
+	return expunge_min > 0 || altmove_min > 0;
 }
+
+unsigned int expire_box_find_min_secs(struct expire_env *env, const char *name)
+{
+	unsigned int secs1, secs2;
+
+	(void)expire_box_find(env, name, &secs1, &secs2);
+	return secs1 < secs2 && secs1 != 0 ? secs1 : secs2;
+}
diff -r ae8180a4febd -r 969656b58e7f src/plugins/expire/expire-env.h
--- a/src/plugins/expire/expire-env.h	Tue Mar 04 06:24:44 2008 +0200
+++ b/src/plugins/expire/expire-env.h	Tue Mar 04 06:26:24 2008 +0200
@@ -3,15 +3,13 @@
 
 struct expire_env;
 
-struct expire_box {
-	const char *name;
-	time_t expire_secs;
-};
-
-struct expire_env *expire_env_init(const char *str);
+struct expire_env *expire_env_init(const char *expunges, const char *altmoves);
 void expire_env_deinit(struct expire_env *env);
 
-const struct expire_box *expire_box_find(struct expire_env *env,
-					 const char *name);
+bool expire_box_find(struct expire_env *env, const char *name,
+		     unsigned int *expunge_secs_r,
+		     unsigned int *altmove_secs_r);
+
+unsigned int expire_box_find_min_secs(struct expire_env *env, const char *name);
 
 #endif
diff -r ae8180a4febd -r 969656b58e7f src/plugins/expire/expire-plugin.c
--- a/src/plugins/expire/expire-plugin.c	Tue Mar 04 06:24:44 2008 +0200
+++ b/src/plugins/expire/expire-plugin.c	Tue Mar 04 06:26:24 2008 +0200
@@ -3,6 +3,7 @@
 #include "lib.h"
 #include "ioloop.h"
 #include "array.h"
+#include "str.h"
 #include "dict.h"
 #include "mail-namespace.h"
 #include "index-mail.h"
@@ -33,9 +34,7 @@
 struct expire_transaction_context {
 	union mailbox_transaction_module_context module_ctx;
 
-	struct mail *mail;
-	time_t first_save_time;
-
+	unsigned int saves:1;
 	unsigned int first_expunged:1;
 };
 
@@ -56,7 +55,6 @@
 
 	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;
@@ -67,21 +65,26 @@
 {
 	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;
+	struct mail *mail;
 	uint32_t seq;
 
+	mail = mail_alloc(_t, 0, NULL);
+
 	/* 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)
+			mail_set_seq(mail, seq);
+			if (mail_get_save_date(mail, stamp_r) == 0) {
+				mail_free(&mail);
 				return;
+			}
 		}
 	}
+	mail_free(&mail);
 
 	/* everything expunged */
 	*stamp_r = 0;
@@ -106,7 +109,6 @@
 		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) {
@@ -114,27 +116,33 @@
 		return -1;
 	}
 
-	T_BEGIN {
+	if (xt->first_expunged || xt->saves) T_BEGIN {
 		const char *key, *value;
 
 		key = t_strconcat(DICT_PATH_SHARED, expire.username, "/",
 				  mailbox_name, NULL);
-		if (!xt->first_expunged) {
+		if (!xt->first_expunged && xt->saves) {
 			/* 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;
+			/* may not be exactly the first message's save time
+			   but a few second difference doesn't matter */
+			new_stamp = ioloop_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));
+			if (new_stamp == 0) {
+				/* everything expunged */
+				dict_unset(dctx, key);
+			} else {
+				new_stamp += xpr_box->expire_secs;
+				dict_set(dctx, key, dec2str(new_stamp));
+			}
 			dict_transaction_commit(dctx);
 		}
 	} T_END;
@@ -148,8 +156,6 @@
 	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);
 }
@@ -190,41 +196,14 @@
 	return _mail;
 }
 
-static void
-mail_set_save_time(struct mailbox_transaction_context *t, uint32_t seq)
+static int expire_save_finish(struct mail_save_context *ctx)
 {
-	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));
-}
+	struct expire_transaction_context *xt =
+		EXPIRE_CONTEXT(ctx->transaction);
+	struct expire_mailbox *xpr_box = EXPIRE_CONTEXT(ctx->transaction->box);
 
-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;
+	xt->saves = TRUE;
+	return xpr_box->module_ctx.super.save_finish(ctx);
 }
 
 static int
@@ -234,16 +213,10 @@
 {
 	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.
+	xt->saves = TRUE;
+	return 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)
@@ -257,7 +230,7 @@
 	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.save_finish = expire_save_finish;
 	box->v.copy = expire_copy;
 
 	xpr_box->expire_secs = expire_secs;
@@ -272,15 +245,17 @@
 	union mail_storage_module_context *xpr_storage =
 		EXPIRE_CONTEXT(storage);
 	struct mailbox *box;
-	const struct expire_box *expire_box;
-	const char *full_name;
+	string_t *vname;
+	unsigned int secs;
 
 	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);
+		vname = t_str_new(128);
+		(void)mail_namespace_get_vname(storage->ns, vname, name);
+
+		secs = expire_box_find_min_secs(expire.env, str_c(vname));
+		if (secs != 0)
+			mailbox_expire_hook(box, secs);
 	}
 	return box;
 }
@@ -302,15 +277,16 @@
 
 void expire_plugin_init(void)
 {
-	const char *env, *dict_uri;
+	const char *expunge_env, *altmove_env, *dict_uri;
 
-	env = getenv("EXPIRE");
-	if (env != NULL) {
+	expunge_env = getenv("EXPIRE");
+	altmove_env = getenv("EXPIRE_ALTMOVE");
+	if (expunge_env != NULL || altmove_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.env = expire_env_init(expunge_env, altmove_env);
 		expire.db = dict_init(dict_uri, DICT_DATA_TYPE_UINT32, NULL);
 		expire.username = getenv("USER");
 
diff -r ae8180a4febd -r 969656b58e7f src/plugins/expire/expire-tool.c
--- a/src/plugins/expire/expire-tool.c	Tue Mar 04 06:24:44 2008 +0200
+++ b/src/plugins/expire/expire-tool.c	Tue Mar 04 06:26:24 2008 +0200
@@ -6,6 +6,7 @@
 #include "randgen.h"
 #include "lib-signals.h"
 #include "dict-client.h"
+#include "mail-index.h"
 #include "mail-search.h"
 #include "mail-storage.h"
 #include "mail-namespace.h"
@@ -26,6 +27,7 @@
 	char *user;
 	pool_t namespace_pool;
 	struct mail_namespace *ns;
+	bool testrun;
 };
 
 static int user_init(struct expire_context *ctx, const char *user)
@@ -54,7 +56,8 @@
 
 static int
 mailbox_delete_old_mails(struct expire_context *ctx, const char *user,
-			 const char *mailbox, time_t expire_secs,
+			 const char *mailbox,
+			 unsigned int expunge_secs, unsigned int altmove_secs,
 			 time_t *oldest_r)
 {
 	struct mail_namespace *ns;
@@ -63,7 +66,10 @@
 	struct mailbox_transaction_context *t;
 	struct mail_search_arg search_arg;
 	struct mail *mail;
+	const char *ns_mailbox;
 	time_t now, save_time;
+	enum mail_error error;
+	enum mail_flags flags;
 	int ret;
 
 	*oldest_r = 0;
@@ -71,8 +77,11 @@
 	if (ctx->user != NULL && strcmp(user, ctx->user) != 0)
 		user_deinit(ctx);
 	if (ctx->user == NULL) {
-		if ((ret = user_init(ctx, user)) <= 0)
+		if ((ret = user_init(ctx, user)) <= 0) {
+			if (ctx->testrun)
+				i_info("User lookup failed: %s", user);
 			return ret;
+		}
 		ctx->user = i_strdup(user);
 	}
 
@@ -80,11 +89,25 @@
 	search_arg.type = SEARCH_ALL;
 	search_arg.next = NULL;
 
-	ns = mail_namespace_find(ctx->ns, &mailbox);
-	if (ns == NULL)
-		return -1;
+	ns_mailbox = mailbox;
+	ns = mail_namespace_find(ctx->ns, &ns_mailbox);
+	if (ns == NULL) {
+		/* entire namespace no longer exists, remove the entry */
+		if (ctx->testrun)
+			i_info("Namespace lookup failed: %s", mailbox);
+		return 0;
+	}
 
-	box = mailbox_open(ns->storage, mailbox, NULL, 0);
+	box = mailbox_open(ns->storage, ns_mailbox, NULL, 0);
+	if (box == NULL) {
+		(void)mail_storage_get_last_error(ns->storage, &error);
+		if (error != MAIL_ERROR_NOTFOUND)
+			return -1;
+		
+		/* mailbox no longer exists, remove the entry */
+		return 0;
+	}
+
 	t = mailbox_transaction_begin(box, 0);
 	search_ctx = mailbox_search_init(t, NULL, &search_arg, NULL);
 	mail = mail_alloc(t, 0, NULL);
@@ -93,14 +116,36 @@
 	while ((ret = mailbox_search_next(search_ctx, mail)) > 0) {
 		if (mail_get_save_date(mail, &save_time) < 0) {
 			/* maybe just got expunged. anyway try again later. */
+			if (ctx->testrun) {
+				i_info("%s: seq=%u uid=%u: "
+				       "Save date lookup failed",
+				       mailbox, mail->seq, mail->uid);
+			}
 			ret = -1;
 			break;
 		}
 
-		if (save_time + expire_secs <= now)
-			mail_expunge(mail);
-		else {
-			/* first non-expunged one. */
+		if (save_time + expunge_secs <= now && expunge_secs != 0) {
+			if (!ctx->testrun)
+				mail_expunge(mail);
+			else {
+				i_info("%s: seq=%u uid=%u: Expunge",
+				       mailbox, mail->seq, mail->uid);
+			}
+		} else if (save_time + altmove_secs <= now && altmove_secs != 0) {
+			/* works only with dbox */
+			flags = mail_get_flags(mail);
+			if ((flags & MAIL_INDEX_MAIL_FLAG_BACKEND) != 0) {
+				/* alread moved */
+			} else if (!ctx->testrun) {
+				mail_update_flags(mail, MODIFY_ADD,
+						  MAIL_INDEX_MAIL_FLAG_BACKEND);
+			} else {
+				i_info("%s: seq=%u uid=%u: Move to alt dir",
+				       mailbox, mail->seq, mail->uid);
+			}
+		} else {
+			/* first non-expired one. */
 			*oldest_r = save_time;
 			break;
 		}
@@ -109,21 +154,29 @@
 
 	if (mailbox_search_deinit(&search_ctx) < 0)
 		ret = -1;
-	if (mailbox_transaction_commit(&t) < 0)
+	if (!ctx->testrun) {
+		if (mailbox_transaction_commit(&t) < 0)
+			ret = -1;
+	} else {
+		mailbox_transaction_rollback(&t);
+	}
+
+	if (mailbox_sync(box, MAILBOX_SYNC_FLAG_FAST, 0, NULL) < 0)
 		ret = -1;
+
 	mailbox_close(&box);
 	return ret < 0 ? -1 : 0;
 }
 
-static void expire_run(void)
+static void expire_run(bool testrun)
 {
 	struct expire_context ctx;
 	struct dict *dict = NULL;
 	struct dict_transaction_context *trans;
 	struct dict_iterate_context *iter;
 	struct expire_env *env;
-	const struct expire_box *expire_box;
 	time_t oldest;
+	unsigned int expunge_secs, altmove_secs;
 	const char *auth_socket, *p, *key, *value;
 	const char *userp, *mailbox;
 	int ret;
@@ -133,8 +186,8 @@
 	mail_storage_register_all();
 	mailbox_list_register_all();
 
-	if (getenv("EXPIRE") == NULL)
-		i_fatal("expire setting not set");
+	if (getenv("EXPIRE") == NULL && getenv("EXPIRE_ALTMOVE") == NULL)
+		i_fatal("expire and expire_altmove settings not set");
 	if (getenv("EXPIRE_DICT") == NULL)
 		i_fatal("expire_dict setting not set");
 
@@ -143,9 +196,10 @@
 		auth_socket = DEFAULT_AUTH_SOCKET_PATH;
 
 	memset(&ctx, 0, sizeof(ctx));
+	ctx.testrun = testrun;
 	ctx.auth_conn = auth_connection_init(auth_socket);
 	ctx.namespace_pool = pool_alloconly_create("namespaces", 1024);
-	env = expire_env_init(getenv("EXPIRE"));
+	env = expire_env_init(getenv("EXPIRE"), getenv("EXPIRE_ALTMOVE"));
 	dict = dict_init(getenv("EXPIRE_DICT"), DICT_DATA_TYPE_UINT32, "");
 	trans = dict_transaction_begin(dict);
 	iter = dict_iterate_init(dict, DICT_PATH_SHARED,
@@ -164,43 +218,64 @@
 		}
 
 		mailbox = p + 1;
-		expire_box = expire_box_find(env, mailbox);
-		if (expire_box == NULL) {
+		if (!expire_box_find(env, mailbox,
+				     &expunge_secs, &altmove_secs)) {
 			/* we're no longer expunging old messages from here */
-			dict_unset(trans, key);
-		} else if (time(NULL) < (time_t)strtoul(value, NULL, 10)) {
+			if (!testrun)
+				dict_unset(trans, key);
+			else
+				i_info("%s: removed from config", mailbox);
+			continue;
+		}
+		if (time(NULL) < (time_t)strtoul(value, NULL, 10)) {
 			/* this and the rest of the timestamps are in future,
 			   so stop processing */
+			if (testrun) {
+				i_info("%s: stop, expire time in future: %s",
+				       mailbox, value);
+			}
 			break;
-		} else {
-			T_BEGIN {
-				const char *username;
+		}
+
+		T_BEGIN {
+			const char *username;
+
+			username = t_strdup_until(userp, p);
+			ret = mailbox_delete_old_mails(&ctx, username,
+						       mailbox, expunge_secs,
+						       altmove_secs, &oldest);
+		} T_END;
 
-				username = t_strdup_until(userp, p);
-				ret = mailbox_delete_old_mails(&ctx, username,
-						mailbox,
-						expire_box->expire_secs,
-						&oldest);
-			} T_END;
-			if (ret < 0) {
-				/* failed to update */
-			} else if (oldest == 0) {
-				/* no more messages or we're no longer
-				   expunging messages from here */
+		if (ret < 0) {
+			/* failed to update */
+		} else if (oldest == 0) {
+			/* no more messages or mailbox deleted */
+			if (!testrun)
 				dict_unset(trans, key);
-			} else {
-				char new_value[MAX_INT_STRLEN];
+			else
+				i_info("%s: no messages left", mailbox);
+		} else {
+			char new_value[MAX_INT_STRLEN];
 
-				oldest += expire_box->expire_secs;
-				i_snprintf(new_value, sizeof(new_value), "%lu",
-					   (unsigned long)oldest);
-				if (strcmp(value, new_value) != 0)
-					dict_set(trans, key, new_value);
+			oldest += altmove_secs != 0 ?
+				altmove_secs : expunge_secs;
+			i_snprintf(new_value, sizeof(new_value), "%lu",
+				   (unsigned long)oldest);
+			if (strcmp(value, new_value) == 0) {
+				/* no change */
+			} else if (!testrun)
+				dict_set(trans, key, new_value);
+			else {
+				i_info("%s: timestamp %s -> %s",
+				       mailbox, value, new_value);
 			}
 		}
 	}
 	dict_iterate_deinit(iter);
-	dict_transaction_commit(trans);
+	if (!testrun)
+		dict_transaction_commit(trans);
+	else
+		dict_transaction_rollback(trans);
 	dict_deinit(&dict);
 
 	if (ctx.user != NULL)
@@ -211,16 +286,19 @@
 	dict_driver_unregister(&dict_driver_client);
 }
 
-int main(void)
+int main(int argc, const char *argv[])
 {
 	struct ioloop *ioloop;
+	bool test;
 
 	lib_init();
 	lib_signals_init();
 	random_init();
 
+	test = argc > 1 && strcmp(argv[1], "--test") == 0;
+
 	ioloop = io_loop_create();
-	expire_run();
+	expire_run(test);
 	io_loop_destroy(&ioloop);
 
 	lib_signals_deinit();