talons

inc.c (36518B)

---

 /*
  * Claws Mail -- a GTK based, lightweight, and fast e-mail client
  * Copyright (C) 1999-2025 the Claws Mail team and Hiroyuki Yamamoto
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 3 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include "defs.h"
 
 #include <fcntl.h>
 #include <glib.h>
 #include <glib/gi18n.h>
 #include <gtk/gtk.h>
 #include <stdio.h>
 #include <unistd.h>
 #include <string.h>
 #include <sys/param.h>
 
 #include "main.h"
 #include "inc.h"
 #include "mainwindow.h"
 #include "folderview.h"
 #include "summaryview.h"
 #include "prefs_common.h"
 #include "prefs_account.h"
 #include "account.h"
 #include "procmsg.h"
 #include "socket.h"
 #include "ssl.h"
 #include "pop.h"
 #include "mbox.h"
 #include "file-utils.h"
 #include "utils.h"
 #include "gtkutils.h"
 #include "statusbar.h"
 #include "msgcache.h"
 #include "manage_window.h"
 #include "stock_pixmap.h"
 #include "progressdialog.h"
 #include "inputdialog.h"
 #include "alertpanel.h"
 #include "folder.h"
 #include "log.h"
 #include "hooks.h"
 #include "logwindow.h"
 #include "passwordstore.h"
 
 static GList *inc_dialog_list = NULL;
 
 static time_t inc_offline_overridden_yes = 0;
 static time_t inc_offline_overridden_no  = 0;
 
 guint inc_lock_count = 0;
 
 static GdkPixbuf *currentpix;
 static GdkPixbuf *errorpix;
 static GdkPixbuf *okpix;
 
 #define MESSAGEBUFSIZE	8192
 
 static gint inc_account_mail_real	(MainWindow		*mainwin,
 					 PrefsAccount		*account);
 
 static IncProgressDialog *inc_progress_dialog_create
 					(gboolean		 autocheck);
 static void inc_progress_dialog_set_list(IncProgressDialog	*inc_dialog);
 static void inc_progress_dialog_destroy	(IncProgressDialog	*inc_dialog);
 
 static IncSession *inc_session_new	(PrefsAccount		*account);
 static void inc_session_destroy		(IncSession		*session);
 static gint inc_start			(IncProgressDialog	*inc_dialog);
 static IncState inc_pop3_session_do	(IncSession		*session);
 
 static void inc_progress_dialog_update	(IncProgressDialog	*inc_dialog,
 					 IncSession		*inc_session);
 
 static void inc_progress_dialog_set_label
 					(IncProgressDialog	*inc_dialog,
 					 IncSession		*inc_session);
 static void inc_progress_dialog_set_progress
 					(IncProgressDialog	*inc_dialog,
 					 IncSession		*inc_session);
 
 static void inc_progress_dialog_update_periodic
 					(IncProgressDialog	*inc_dialog,
 					 IncSession		*inc_session);
 
 static gint inc_recv_data_progressive	(Session	*session,
 					 guint		 cur_len,
 					 guint		 total_len,
 					 gpointer	 data);
 static gint inc_recv_data_finished	(Session	*session,
 					 guint		 len,
 					 gpointer	 data);
 static gint inc_recv_message		(Session	*session,
 					 const gchar	*msg,
 					 gpointer	 data);
 static gint inc_drop_message		(Pop3Session	*session,
 					 const gchar	*file);
 
 static void inc_put_error		(IncState	 istate,
 					 Pop3Session 	*session);
 
 static void inc_showlog_cb		(GtkWidget	*widget,
 					 gpointer	 data);
 static void inc_cancel_cb		(GtkWidget	*widget,
 					 gpointer	 data);
 static gint inc_dialog_delete_cb	(GtkWidget	*widget,
 					 GdkEventAny	*event,
 					 gpointer	 data);
 
 static gint get_spool			(FolderItem	*dest,
 					 const gchar	*mbox,
 					 PrefsAccount	*account);
 
 static gint inc_spool_account(PrefsAccount *account);
 
 static void inc_notify_cmd(gint new_msgs, gboolean notify);
 
 void inc_mail(MainWindow *mainwin, gboolean notify)
 {
 	gint new_msgs = 0;
 	gint account_new_msgs = 0;
 
 	if (inc_lock_count) return;
 
 	if (prefs_common.work_offline &&
 	    !inc_offline_should_override(TRUE,
 		_("Claws Mail needs network access in order "
 		  "to get mails.")))
 		return;
 
 	inc_lock();
 	main_window_lock(mainwin);
 
 	if (prefs_common.use_extinc && prefs_common.extinc_cmd) {
 		/* external incorporating program */
 		if (execute_command_line(prefs_common.extinc_cmd, FALSE, NULL) < 0) {
 			main_window_unlock(mainwin);
 			inc_unlock();
 			return;
 		}
 	} else {
 		account_new_msgs = inc_account_mail_real(mainwin, cur_account);
 		if (account_new_msgs > 0)
 			new_msgs += account_new_msgs;
 	}
 
 	statusbar_progress_all(0,0,0);
 	main_window_unlock(mainwin);
  	inc_notify_cmd(new_msgs, notify);
 	inc_unlock();
 }
 
 void inc_pop_before_smtp(PrefsAccount *acc)
 {
 	IncProgressDialog *inc_dialog;
 	IncSession *session;
 	MainWindow *mainwin;
 
 	mainwin = mainwindow_get_mainwindow();
 
     	session = inc_session_new(acc);
     	if (!session) return;
 	POP3_SESSION(session->session)->pop_before_smtp = TRUE;
 
     	inc_dialog = inc_progress_dialog_create(FALSE);
     	inc_dialog->queue_list = g_list_append(inc_dialog->queue_list,
 					       session);
 	/* FIXME: assumes to attach to first main window */
 	inc_dialog->mainwin = mainwin;
 	inc_progress_dialog_set_list(inc_dialog);
 
 	if (mainwin) {
 		toolbar_main_set_sensitive(mainwin);
 		main_window_set_menu_sensitive(mainwin);
 	}
 
 	inc_start(inc_dialog);
 }
 
 static gint inc_account_mail_real(MainWindow *mainwin, PrefsAccount *account)
 {
 	IncProgressDialog *inc_dialog;
 	IncSession *session;
 
 	switch (account->protocol) {
 	case A_IMAP4:
 		/* Melvin: bug [14]
 		 * FIXME: it should return foldeview_check_new() value.
 		 * TODO: do it when bug [19] is fixed (IMAP folder sets
 		 * an incorrect new message count)
 		 */
 		folderview_check_new(FOLDER(account->folder));
 		return 0;
 	case A_POP3:
 		session = inc_session_new(account);
 		if (!session) return 0;
 
 		inc_dialog = inc_progress_dialog_create(FALSE);
 		inc_dialog->queue_list = g_list_append(inc_dialog->queue_list,
 						       session);
 		inc_dialog->mainwin = mainwin;
 		inc_progress_dialog_set_list(inc_dialog);
 
 		if (mainwin) {
 			toolbar_main_set_sensitive(mainwin);
 			main_window_set_menu_sensitive(mainwin);
 		}
 
 		return inc_start(inc_dialog);
 
 	case A_LOCAL:
 		return inc_spool_account(account);
 
 	default:
 		break;
 	}
 	return 0;
 }
 
 gint inc_account_mail(MainWindow *mainwin, PrefsAccount *account)
 {
 	gint new_msgs;
 
 	if (inc_lock_count) return 0;
 
 	if (account->receive_in_progress) return 0;
 
 	if (prefs_common.work_offline &&
 	    !inc_offline_should_override(TRUE,
 		_("Claws Mail needs network access in order "
 		  "to get mails.")))
 		return 0;
 
 	main_window_lock(mainwin);
 
 	new_msgs = inc_account_mail_real(mainwin, account);
 
 	statusbar_progress_all(0,0,0);
 	main_window_unlock(mainwin);
 
 	return new_msgs;
 }
 
 void inc_account_list_mail(MainWindow *mainwin, GList *account_list, gboolean autocheck,
 			  gboolean notify)
 {
 	GList *list, *queue_list = NULL;
 	IncProgressDialog *inc_dialog;
 	gint new_msgs = 0, num;
 
 	if (prefs_common.work_offline &&
 	    !inc_offline_should_override( (autocheck == FALSE),
 		_("Claws Mail needs network access in order "
 		  "to get mails.")))
 		return;
 
 	if (inc_lock_count) return;
 
 	main_window_lock(mainwin);
 
 	if (!account_list) {
 		statusbar_progress_all(0,0,0);
 		main_window_unlock(mainwin);
  		inc_notify_cmd(new_msgs, notify);
 		return;
 	}
 
 	if (prefs_common.use_extinc && prefs_common.extinc_cmd) {
 		/* external incorporating program */
 		if (execute_command_line(prefs_common.extinc_cmd, FALSE, NULL) < 0) {
 			log_error(LOG_PROTOCOL, _("%s failed\n"), prefs_common.extinc_cmd);
 
 			main_window_unlock(mainwin);
 			return;
 		}
 	}
 
 	/* Check all accounts in the list, one by one. */
 	for (list = account_list; list != NULL; list = list->next) {
 		PrefsAccount *account = list->data;
 
 		if (account == NULL) {
 			debug_print("INC: Huh? inc_account_list_mail() got a NULL account, this should not happen!\n");
 			continue;
 		}
 
 		debug_print("INC: checking account %d\n", account->account_id);
 		switch (account->protocol) {
 			case A_POP3:
 				if (!(account->receive_in_progress)) {
 					IncSession *session = inc_session_new(account);
 
 					if (session != NULL) {
 						debug_print("INC: adding POP3 account %d to inc queue\n",
 								account->account_id);
 						queue_list = g_list_append(queue_list, session);
 					}
 				}
 				break;
 
 			case A_IMAP4:
 				new_msgs += folderview_check_new(FOLDER(account->folder));
 				break;
 
 			case A_LOCAL:
 				num = inc_spool_account(account);
 				if (num > 0)
 					new_msgs += num;
 				break;
 
 			case A_NONE:
 				/* Nothing to do here, it's a SMTP-only account. */
 				break;
 
 			default:
 				debug_print("INC: encountered account %d with unknown protocol %d, ignoring\n",
 						account->account_id, account->protocol);
 				break;
 		}
 	}
 
 
 
 	if (queue_list) {
 		inc_dialog = inc_progress_dialog_create(autocheck);
 		inc_dialog->queue_list = queue_list;
 		inc_dialog->mainwin = mainwin;
 		inc_progress_dialog_set_list(inc_dialog);
 
 		toolbar_main_set_sensitive(mainwin);
 		main_window_set_menu_sensitive(mainwin);
 		new_msgs += inc_start(inc_dialog);
 	}
 
 	statusbar_progress_all(0,0,0);
 	main_window_unlock(mainwin);
  	inc_notify_cmd(new_msgs, notify);
 }
 
 void inc_all_account_mail(MainWindow *mainwin, gboolean notify)
 {
 	GList *list, *list2 = NULL;
 	gboolean condition = FALSE;
 
 	for (list = account_get_list(); list != NULL; list = list->next) {
 		PrefsAccount *account = list->data;
 		/* Nothing to do for SMTP-only accounts. */
 		if (account->protocol == A_NONE)
 			continue;
 		list2 = g_list_append(list2, account);
 	}
 
 	/* Do the check on the collected accounts. */
 	if (list2 != NULL) {
 		gboolean hide_dialog = TRUE;
 		inc_account_list_mail(mainwin, list2, hide_dialog, notify);
 		g_list_free(list2);
 	}
 }
 
 static void inc_progress_dialog_size_allocate_cb(GtkWidget *widget,
 					 GtkAllocation *allocation)
 {
 	cm_return_if_fail(allocation != NULL);
 
 	gtk_window_get_size(GTK_WINDOW(widget),
 		&prefs_common.receivewin_width, &prefs_common.receivewin_height);
 }
 
 static IncProgressDialog *inc_progress_dialog_create(gboolean autocheck)
 {
 	IncProgressDialog *dialog;
 	ProgressDialog *progress;
 	static GdkGeometry geometry;
 
 	dialog = g_new0(IncProgressDialog, 1);
 
 	progress = progress_dialog_create();
 	gtk_window_set_title(GTK_WINDOW(progress->window),
 			     _("Retrieving new messages"));
 	g_signal_connect(G_OBJECT(progress->showlog_btn), "clicked",
 			 G_CALLBACK(inc_showlog_cb), dialog);
 	g_signal_connect(G_OBJECT(progress->cancel_btn), "clicked",
 			 G_CALLBACK(inc_cancel_cb), dialog);
 	g_signal_connect(G_OBJECT(progress->window), "delete_event",
 			 G_CALLBACK(inc_dialog_delete_cb), dialog);
 	g_signal_connect(G_OBJECT(progress->window), "size_allocate",
 			 G_CALLBACK(inc_progress_dialog_size_allocate_cb), NULL);
  	/* manage_window_set_transient(GTK_WINDOW(progress->window)); */
 
 	progress_dialog_get_fraction(progress);
 
 	stock_pixbuf_gdk(STOCK_PIXMAP_COMPLETE, &okpix);
 	stock_pixbuf_gdk(STOCK_PIXMAP_CONTINUE, &currentpix);
 	stock_pixbuf_gdk(STOCK_PIXMAP_ERROR, &errorpix);
 
 	if (!geometry.min_height) {
 		geometry.min_width = 460;
 		geometry.min_height = 250;
 	}
 
 	gtk_window_set_geometry_hints(GTK_WINDOW(progress->window), NULL, &geometry,
 				      GDK_HINT_MIN_SIZE);
 	gtk_widget_set_size_request(progress->window, prefs_common.receivewin_width,
 				    prefs_common.receivewin_height);
 
 	dialog->dialog = progress;
 	dialog->progress_tv = g_date_time_new_now_local();
 	dialog->folder_tv = g_date_time_new_now_local();
 	dialog->queue_list = NULL;
 	dialog->cur_row = 0;
 
 	inc_dialog_list = g_list_append(inc_dialog_list, dialog);
 
 	return dialog;
 }
 
 static void inc_progress_dialog_set_list(IncProgressDialog *inc_dialog)
 {
 	GList *list;
 
 	for (list = inc_dialog->queue_list; list != NULL; list = list->next) {
 		IncSession *session = list->data;
 		Pop3Session *pop3_session = POP3_SESSION(session->session);
 
 		session->data = inc_dialog;
 
 		progress_dialog_list_set(inc_dialog->dialog,
 					 -1, NULL,
 					 pop3_session->ac_prefs->account_name,
 					 _("Standby"));
 	}
 }
 
 static void inc_progress_dialog_clear(IncProgressDialog *inc_dialog)
 {
 	progress_dialog_get_fraction(inc_dialog->dialog);
 	progress_dialog_set_label(inc_dialog->dialog, "");
 	if (inc_dialog->mainwin)
 		main_window_progress_off(inc_dialog->mainwin);
 }
 
 static void inc_progress_dialog_destroy(IncProgressDialog *inc_dialog)
 {
 	cm_return_if_fail(inc_dialog != NULL);
 
 	inc_dialog_list = g_list_remove(inc_dialog_list, inc_dialog);
 
 	if (inc_dialog->mainwin)
 		main_window_progress_off(inc_dialog->mainwin);
 	progress_dialog_destroy(inc_dialog->dialog);
 
 	g_date_time_unref(inc_dialog->progress_tv);
 	g_date_time_unref(inc_dialog->folder_tv);
 
 	g_free(inc_dialog);
 }
 
 static IncSession *inc_session_new(PrefsAccount *account)
 {
 	IncSession *session;
 
 	cm_return_val_if_fail(account != NULL, NULL);
 
 	if (account->protocol != A_POP3)
 		return NULL;
 	if (!account->recv_server || !account->userid)
 		return NULL;
 
 	session = g_new0(IncSession, 1);
 
 	session->session = pop3_session_new(account);
 	session->session->data = session;
 	POP3_SESSION(session->session)->drop_message = inc_drop_message;
 	session_set_recv_message_notify(session->session,
 					inc_recv_message, session);
 	session_set_recv_data_progressive_notify(session->session,
 						 inc_recv_data_progressive,
 						 session);
 	session_set_recv_data_notify(session->session,
 				     inc_recv_data_finished, session);
 
 	return session;
 }
 
 static void inc_session_destroy(IncSession *session)
 {
 	cm_return_if_fail(session != NULL);
 
 	session_destroy(session->session);
 	g_free(session);
 }
 
 static gint pop3_get_port(Pop3Session *pop3_session)
 {
 	return pop3_session->ac_prefs->set_popport ?
 		pop3_session->ac_prefs->popport :
 		pop3_session->ac_prefs->ssl_pop == SSL_TUNNEL ? 995 : 110;
 }
 
 static gint inc_start(IncProgressDialog *inc_dialog)
 {
 	IncSession *session;
 	GList *qlist;
 	Pop3Session *pop3_session;
 	IncState inc_state;
 	gint new_msgs = 0;
 	gchar *msg;
 	FolderItem *processing, *inbox;
 	GSList *msglist, *msglist_element;
 	gboolean cancelled = FALSE;
 
 	qlist = inc_dialog->queue_list;
 	while (qlist != NULL) {
 		GList *next = qlist->next;
 
 		session = qlist->data;
 		pop3_session = POP3_SESSION(session->session);
 		pop3_session->user = g_strdup(pop3_session->ac_prefs->userid);
 
 		if (inc_dialog->show_dialog)
 			manage_window_focus_in
 				(inc_dialog->dialog->window,
 				 NULL, NULL);
 
 		if (password_get(pop3_session->user,
 					pop3_session->ac_prefs->recv_server,
 					"pop3", pop3_get_port(pop3_session),
 					&(pop3_session->pass))) {
 			/* NOP */;
 		} else if ((pop3_session->pass = passwd_store_get_account(
 						pop3_session->ac_prefs->account_id, PWS_ACCOUNT_RECV)) == NULL) {
 			gchar *pass;
 
 			pass = input_dialog_query_password_keep
 				(pop3_session->ac_prefs->recv_server,
 				 pop3_session->user,
 				 &(pop3_session->ac_prefs->session_passwd));
 
 			if (pass) {
 				pop3_session->pass = pass;
 			}
 		}
 
 		if (inc_dialog->show_dialog)
 			manage_window_focus_out
 				(inc_dialog->dialog->window,
 				 NULL, NULL);
 
 		qlist = next;
 	}
 
 #define SET_PIXMAP_AND_TEXT(pix, str)					   \
 {									   \
 	progress_dialog_list_set(inc_dialog->dialog,			   \
 				 inc_dialog->cur_row,			   \
 				 pix,					   \
 				 NULL,					   \
 				 str);					   \
 }
 
 	for (; inc_dialog->queue_list != NULL && !cancelled; inc_dialog->cur_row++) {
 		session = inc_dialog->queue_list->data;
 		pop3_session = POP3_SESSION(session->session);
 
 		if (pop3_session->pass == NULL) {
 			SET_PIXMAP_AND_TEXT(okpix, _("Cancelled"));
 			inc_dialog->queue_list =
 				g_list_remove(inc_dialog->queue_list, session);
 			inc_session_destroy(session);
 			continue;
 		}
 
 		inc_progress_dialog_clear(inc_dialog);
 		progress_dialog_scroll_to_row(inc_dialog->dialog,
 					      inc_dialog->cur_row);
 
 		SET_PIXMAP_AND_TEXT(currentpix, _("Retrieving"));
 
 		/* begin POP3 session */
 		inc_state = inc_pop3_session_do(session);
 
 		switch (inc_state) {
 		case INC_SUCCESS:
 			if (pop3_session->cur_total_num > 0)
 				msg = g_strdup_printf(
 					"Done (%d messages (%s) received)",
 					 pop3_session->cur_total_num,
 					 to_human_readable((goffset)pop3_session->cur_total_recv_bytes));
 			else
 				msg = g_strdup_printf(_("Done (no new messages)"));
 			SET_PIXMAP_AND_TEXT(okpix, msg);
 			g_free(msg);
 			break;
 		case INC_CONNECT_ERROR:
 			SET_PIXMAP_AND_TEXT(errorpix, _("Connection failed"));
 			break;
 		case INC_AUTH_FAILED:
 			SET_PIXMAP_AND_TEXT(errorpix, _("Auth failed"));
 			if (pop3_session->ac_prefs->session_passwd) {
 				g_free(pop3_session->ac_prefs->session_passwd);
 				pop3_session->ac_prefs->session_passwd = NULL;
 			}
 			break;
 		case INC_LOCKED:
 			SET_PIXMAP_AND_TEXT(errorpix, _("Locked"));
 			break;
 		case INC_ERROR:
 		case INC_NO_SPACE:
 		case INC_IO_ERROR:
 		case INC_SOCKET_ERROR:
 		case INC_EOF:
 			SET_PIXMAP_AND_TEXT(errorpix, _("Error"));
 			break;
 		case INC_TIMEOUT:
 			SET_PIXMAP_AND_TEXT(errorpix, _("Timeout"));
 			break;
 		case INC_CANCEL:
 			SET_PIXMAP_AND_TEXT(okpix, _("Cancelled"));
 			if (!inc_dialog->show_dialog)
 				cancelled = TRUE;
 			break;
 		default:
 			break;
 		}
 
 		/* CLAWS: perform filtering actions on dropped message */
 		/* CLAWS: get default inbox (perhaps per account) */
 		if (pop3_session->ac_prefs->inbox) {
 			/* CLAWS: get destination folder / mailbox */
 			inbox = folder_find_item_from_identifier(pop3_session->ac_prefs->inbox);
 			if (!inbox)
 				inbox = folder_get_default_inbox();
 		} else
 			inbox = folder_get_default_inbox();
 
 		/* get list of messages in processing */
 		processing = folder_get_default_processing(pop3_session->ac_prefs->account_id);
 		folder_item_scan(processing);
 		msglist = folder_item_get_msg_list(processing);
 
 		/* process messages */
 		folder_item_update_freeze();
 
 		for(msglist_element = msglist; msglist_element != NULL;
 		    msglist_element = msglist_element->next) {
 			procmsg_msginfo_free((MsgInfo**)&(msglist_element->data));
 		}
 		folder_item_update_thaw();
 
 		g_slist_free(msglist);
 
 		statusbar_pop_all();
 
 		new_msgs += pop3_session->cur_total_num;
 
 		pop3_write_uidl_list(pop3_session);
 
 		if (inc_state != INC_SUCCESS && inc_state != INC_CANCEL) {
 			if (inc_dialog->show_dialog)
 				manage_window_focus_in(inc_dialog->dialog->window, NULL, NULL);
 			inc_put_error(inc_state, pop3_session);
 			if (inc_dialog->show_dialog)
 				manage_window_focus_out(inc_dialog->dialog->window, NULL, NULL);
 			if (inc_state == INC_NO_SPACE || inc_state == INC_IO_ERROR)
 				break;
 		}
 		folder_item_free_cache(processing, TRUE);
 
 		inc_session_destroy(session);
 		inc_dialog->queue_list = g_list_remove(inc_dialog->queue_list, session);
 	}
 
 #undef SET_PIXMAP_AND_TEXT
 
 	char fin_msg[BUFSIZ];
 	snprintf(fin_msg, sizeof(fin_msg), "Finished (%d new)", new_msgs);
 	progress_dialog_set_label(inc_dialog->dialog, fin_msg);
 
 	while (inc_dialog->queue_list != NULL) {
 		session = inc_dialog->queue_list->data;
 		inc_session_destroy(session);
 		inc_dialog->queue_list = g_list_remove(inc_dialog->queue_list, session);
 	}
 	inc_progress_dialog_destroy(inc_dialog);
 	return new_msgs;
 }
 
 static IncState inc_pop3_session_do(IncSession *session)
 {
 	Pop3Session *pop3_session = POP3_SESSION(session->session);
 	IncProgressDialog *inc_dialog = (IncProgressDialog *)session->data;
 	PrefsAccount *ac = pop3_session->ac_prefs;
 	gchar *server;
 	gchar *account_name;
 	gushort port;
 	gchar *buf;
 
 	debug_print("getting new messages of account %s...\n",
 		    ac->account_name);
 
 	ac->last_pop_login_time = time(NULL);
 
 	buf = g_strdup_printf(_("%s: Retrieving new messages"),
 			      ac->recv_server);
 	gtk_window_set_title(GTK_WINDOW(inc_dialog->dialog->window), buf);
 	g_free(buf);
 
 	server = ac->recv_server;
 	account_name = ac->account_name;
 	port = pop3_get_port(pop3_session);
 
 	SESSION(pop3_session)->ssl_type = ac->ssl_pop;
 	if (ac->ssl_pop != SSL_NONE)
 		SESSION(pop3_session)->nonblocking =
 			ac->use_nonblocking_ssl;
 
 	buf = g_strdup_printf(_("Account '%s': Connecting to POP3 server: %s:%d..."),
 				account_name, server, port);
 	statusbar_print_all("%s", buf);
 	log_message(LOG_PROTOCOL, "%s\n", buf);
 
 	progress_dialog_set_label(inc_dialog->dialog, buf);
 
 	GTK_EVENTS_FLUSH();
 	g_free(buf);
 
 	session_set_timeout(SESSION(pop3_session),
 			    prefs_common.io_timeout_secs * 1000);
 
 	if (session_connect(SESSION(pop3_session), server, port) < 0) {
 		char msg[BUFSIZ];
 		snprintf(msg, sizeof(msg), "Cannot connect to POP3 server at %s:%d", server, port);
 		alertpanel_error(msg);
 		manage_window_focus_out(inc_dialog->dialog->window, NULL, NULL);
 		log_error(LOG_PROTOCOL, msg);
 		session->inc_state = INC_CONNECT_ERROR;
 		statusbar_pop_all();
 		return INC_CONNECT_ERROR;
 	}
 
 	while (session_is_running(SESSION(pop3_session)) &&
 	       session->inc_state != INC_CANCEL)
 		gtk_main_iteration();
 
 	if (session->inc_state == INC_SUCCESS) {
 		switch (pop3_session->error_val) {
 		case PS_SUCCESS:
 			switch (SESSION(pop3_session)->state) {
 			case SESSION_ERROR:
 				if (pop3_session->state == POP3_READY)
 					session->inc_state = INC_CONNECT_ERROR;
 				else
 					session->inc_state = INC_ERROR;
 				break;
 			case SESSION_EOF:
 				session->inc_state = INC_EOF;
 				break;
 			case SESSION_TIMEOUT:
 				session->inc_state = INC_TIMEOUT;
 				break;
 			default:
 				session->inc_state = INC_SUCCESS;
 				break;
 			}
 			break;
 		case PS_AUTHFAIL:
 			session->inc_state = INC_AUTH_FAILED;
 			break;
 		case PS_IOERR:
 			session->inc_state = INC_IO_ERROR;
 			break;
 		case PS_SOCKET:
 			session->inc_state = INC_SOCKET_ERROR;
 			break;
 		case PS_LOCKBUSY:
 			session->inc_state = INC_LOCKED;
 			break;
 		default:
 			session->inc_state = INC_ERROR;
 			break;
 		}
 	}
 
 	session_disconnect(SESSION(pop3_session));
 	statusbar_pop_all();
 
 	return session->inc_state;
 }
 
 static void inc_progress_dialog_update(IncProgressDialog *inc_dialog,
 				       IncSession *inc_session)
 {
 	inc_progress_dialog_set_label(inc_dialog, inc_session);
 	inc_progress_dialog_set_progress(inc_dialog, inc_session);
 }
 
 static void inc_progress_dialog_set_label(IncProgressDialog *inc_dialog,
 					  IncSession *inc_session)
 {
 	ProgressDialog *dialog = inc_dialog->dialog;
 	Pop3Session *session;
 
 	cm_return_if_fail(inc_session != NULL);
 
 	session = POP3_SESSION(inc_session->session);
 
 	switch (session->state) {
 	case POP3_GREETING:
 		break;
 	case POP3_GETAUTH_USER:
 	case POP3_GETAUTH_PASS:
 		progress_dialog_set_label(dialog, _("Authenticating..."));
 		statusbar_pop_all();
 		statusbar_print_all(_("Retrieving messages from %s (%s)..."),
 				    SESSION(session)->server,
 				    session->ac_prefs->account_name);
 		break;
 	case POP3_GETRANGE_STAT:
 		progress_dialog_set_label
 			(dialog, _("Getting the number of new messages (STAT)..."));
 		break;
 	case POP3_GETRANGE_LAST:
 		progress_dialog_set_label
 			(dialog, _("Getting the number of new messages (LAST)..."));
 		break;
 	case POP3_GETRANGE_UIDL:
 		progress_dialog_set_label
 			(dialog, _("Getting the number of new messages (UIDL)..."));
 		break;
 	case POP3_GETSIZE_LIST:
 		progress_dialog_set_label
 			(dialog, _("Getting the size of messages (LIST)..."));
 		break;
 	case POP3_RETR:
 	case POP3_RETR_RECV:
 	case POP3_DELETE:
 		break;
 	case POP3_LOGOUT:
 		progress_dialog_set_label(dialog, _("Quitting"));
 		break;
 	default:
 		break;
 	}
 }
 
 static void inc_progress_dialog_set_progress(IncProgressDialog *inc_dialog,
 					     IncSession *inc_session)
 {
 	gchar buf[MESSAGEBUFSIZE];
 	Pop3Session *pop3_session = POP3_SESSION(inc_session->session);
 	gchar *total_size_str;
 	gint cur_total;
 	gint total;
 
 	if (!pop3_session->new_msg_exist) return;
 
 	cur_total = inc_session->cur_total_bytes;
 	total = pop3_session->total_bytes;
 	if (pop3_session->state == POP3_RETR ||
 	    pop3_session->state == POP3_RETR_RECV ||
 	    pop3_session->state == POP3_DELETE) {
 		Xstrdup_a(total_size_str, to_human_readable((goffset)total), return);
 		g_snprintf(buf, sizeof(buf),
 			   _("Retrieving message (%d / %d) (%s / %s)"),
 			   pop3_session->cur_msg, pop3_session->count,
 			   to_human_readable((goffset)cur_total), total_size_str);
 		progress_dialog_set_label(inc_dialog->dialog, buf);
 	}
 
 	progress_dialog_set_fraction
 		(inc_dialog->dialog, (total == 0) ? 0: (gfloat)cur_total / (gfloat)total);
 
 	statusbar_progress_all(pop3_session->cur_msg, pop3_session->count, 1);
 
 	if (pop3_session->cur_total_num > 0) {
 		int n = pop3_session->cur_total_num;
 		char *recv = to_human_readable((goffset)pop3_session->cur_total_recv_bytes);
 		g_snprintf(buf, sizeof(buf), "Retrieving messages (%d (%s) received)", n, recv),
 		progress_dialog_list_set_status(inc_dialog->dialog, inc_dialog->cur_row, buf);
 	}
 }
 
 static void inc_progress_dialog_update_periodic(IncProgressDialog *inc_dialog,
 						IncSession *inc_session)
 {
 	GDateTime *tv_cur = g_date_time_new_now_local();
 	GTimeSpan tv_result;
 
 	tv_result = g_date_time_difference(tv_cur, inc_dialog->progress_tv);
 	g_date_time_unref(tv_cur);
 	if (tv_result < 0) {
 	    tv_result += G_USEC_PER_SEC;
 	}
 
 	uint progress_update_interval = 200; // milliseconds
 	if (tv_result > progress_update_interval) {
                 inc_progress_dialog_update(inc_dialog, inc_session);
 		tv_cur = g_date_time_add(inc_dialog->progress_tv, tv_result);
 		g_date_time_unref(inc_dialog->progress_tv);
                 inc_dialog->progress_tv = tv_cur;
 	}
 }
 
 static gint inc_recv_data_progressive(Session *session, guint cur_len,
 				      guint total_len, gpointer data)
 {
 	IncSession *inc_session = (IncSession *)data;
 	Pop3Session *pop3_session = POP3_SESSION(session);
 	IncProgressDialog *inc_dialog;
 	gint cur_total;
 
 	cm_return_val_if_fail(inc_session != NULL, -1);
 
 	if (pop3_session->state != POP3_RETR &&
 	    pop3_session->state != POP3_RETR_RECV &&
 	    pop3_session->state != POP3_DELETE &&
 	    pop3_session->state != POP3_LOGOUT) return 0;
 
 	if (!pop3_session->new_msg_exist) return 0;
 
 	cur_total = pop3_session->cur_total_bytes + cur_len;
 	if (cur_total > pop3_session->total_bytes)
 		cur_total = pop3_session->total_bytes;
 	inc_session->cur_total_bytes = cur_total;
 
 	inc_dialog = (IncProgressDialog *)inc_session->data;
 	inc_progress_dialog_update_periodic(inc_dialog, inc_session);
 
 	return 0;
 }
 
 static gint inc_recv_data_finished(Session *session, guint len, gpointer data)
 {
 	IncSession *inc_session = (IncSession *)data;
 	IncProgressDialog *inc_dialog;
 
 	cm_return_val_if_fail(inc_session != NULL, -1);
 
 	inc_dialog = (IncProgressDialog *)inc_session->data;
 
 	inc_recv_data_progressive(session, 0, 0, inc_session);
 
 	if (POP3_SESSION(session)->state == POP3_LOGOUT) {
 		inc_progress_dialog_update(inc_dialog, inc_session);
 	}
 
 	return 0;
 }
 
 static gint inc_recv_message(Session *session, const gchar *msg, gpointer data)
 {
 	IncSession *inc_session = (IncSession *)data;
 	IncProgressDialog *inc_dialog;
 
 	cm_return_val_if_fail(inc_session != NULL, -1);
 
 	inc_dialog = (IncProgressDialog *)inc_session->data;
 
 	switch (POP3_SESSION(session)->state) {
 	case POP3_GETAUTH_USER:
 	case POP3_GETAUTH_PASS:
 	case POP3_GETRANGE_STAT:
 	case POP3_GETRANGE_LAST:
 	case POP3_GETRANGE_UIDL:
 	case POP3_GETSIZE_LIST:
 		inc_progress_dialog_update(inc_dialog, inc_session);
 		break;
 	case POP3_RETR:
 		inc_recv_data_progressive(session, 0, 0, inc_session);
 		break;
 	case POP3_LOGOUT:
 		inc_progress_dialog_update(inc_dialog, inc_session);
 		break;
 	default:
 		break;
 	}
 
 	return 0;
 }
 
 static gint inc_drop_message(Pop3Session *session, const gchar *file)
 {
 	FolderItem *inbox;
 	FolderItem *dropfolder;
 	IncSession *inc_session = (IncSession *)(SESSION(session)->data);
 	gint msgnum;
 
 	cm_return_val_if_fail(inc_session != NULL, -1);
 
 	if (session->ac_prefs->inbox) {
 		inbox = folder_find_item_from_identifier
 			(session->ac_prefs->inbox);
 		if (!inbox)
 			inbox = folder_get_default_inbox();
 	} else
 		inbox = folder_get_default_inbox();
 	if (!inbox) {
 		unlink(file);
 		return -1;
 	}
 
 	/* CLAWS: claws uses a global .processing folder for the filtering. */
 	dropfolder = folder_get_default_processing(session->ac_prefs->account_id);
 
 	/* add msg file to drop folder */
 	if ((msgnum = folder_item_add_msg(
 			dropfolder, file, NULL, TRUE)) < 0) {
 		unlink(file);
 		return -1;
 	}
 
 	return 0;
 }
 
 static void inc_put_error(IncState istate, Pop3Session *session)
 {
 	gchar *log_msg = NULL;
 	gchar *err_msg = NULL;
 	gboolean fatal_error = FALSE;
 
 	switch (istate) {
 	case INC_CONNECT_ERROR:
 		fatal_error = TRUE;
 		err_msg = g_strdup_printf(_("Connection to %s:%d failed."),
 					  SESSION(session)->server,
 					  SESSION(session)->port);
 		break;
 	case INC_ERROR:
 		log_msg = _("Error occurred while processing mail.");
 		fatal_error = TRUE;
 		if (session->error_msg)
 			err_msg = g_strdup_printf
 				(_("Error occurred while processing mail:\n%s"),
 				 session->error_msg);
 		else
 			err_msg = g_strdup(log_msg);
 		break;
 	case INC_NO_SPACE:
 		log_msg = _("No disk space left.");
 		err_msg = g_strdup(log_msg);
 		fatal_error = TRUE;
 		break;
 	case INC_IO_ERROR:
 		log_msg = _("Can't write file.");
 		err_msg = g_strdup(log_msg);
 		fatal_error = TRUE;
 		break;
 	case INC_SOCKET_ERROR:
 		log_msg = _("Socket error.");
 		err_msg = g_strdup_printf(_("Socket error on connection to %s:%d."),
 					  SESSION(session)->server,
 					  SESSION(session)->port);
 		break;
 	case INC_EOF:
 		log_msg = _("Connection closed by the remote host.");
 		err_msg = g_strdup_printf(_("Connection to %s:%d closed by the remote host."),
 					  SESSION(session)->server,
 					  SESSION(session)->port);
 		break;
 	case INC_LOCKED:
 		log_msg = _("Mailbox is locked.");
 		if (session->error_msg)
 			err_msg = g_strdup_printf(_("Mailbox is locked:\n%s"),
 						  session->error_msg);
 		else
 			err_msg = g_strdup(log_msg);
 		break;
 	case INC_AUTH_FAILED:
 		log_msg = _("Authentication failed.");
 		fatal_error = TRUE;
 		if (session->error_msg)
 			err_msg = g_strdup_printf
 				(_("Authentication failed:\n%s"), session->error_msg);
 		else
 			err_msg = g_strdup(log_msg);
 		break;
 	case INC_TIMEOUT:
 		log_msg = _("Session timed out. You may be able to "
 			    "recover by increasing the timeout value in "
 			    "Preferences/Other/Miscellaneous.");
 		err_msg = g_strdup_printf(_("Connection to %s:%d timed out."),
 					  SESSION(session)->server,
 					  SESSION(session)->port);
 		break;
 	default:
 		break;
 	}
 
 	if (log_msg) {
 		if (fatal_error)
 			log_error(LOG_PROTOCOL, "%s\n", log_msg);
 		else
 			log_warning(LOG_PROTOCOL, "%s\n", log_msg);
 	}
 
 	if (err_msg) {
 		alertpanel_error_log("%s", err_msg);
 		g_free(err_msg);
 	}
 }
 
 static void inc_cancel(IncProgressDialog *dialog)
 {
 	IncSession *session;
 
 	cm_return_if_fail(dialog != NULL);
 
 	if (dialog->queue_list == NULL) {
 		inc_progress_dialog_destroy(dialog);
 		return;
 	}
 
 	session = dialog->queue_list->data;
 
 	session->inc_state = INC_CANCEL;
 
 	log_message(LOG_PROTOCOL, _("Incorporation cancelled\n"));
 }
 
 gboolean inc_is_active(void)
 {
 	return (inc_dialog_list != NULL);
 }
 
 void inc_cancel_all(void)
 {
 	GList *cur;
 
 	for (cur = inc_dialog_list; cur != NULL; cur = cur->next)
 		inc_cancel((IncProgressDialog *)cur->data);
 }
 
 static void inc_showlog_cb(GtkWidget *widget, gpointer data)
 {
 	MainWindow *mainwin = mainwindow_get_mainwindow();
 
 	log_window_show(mainwin->logwin);
 }
 
 static void inc_cancel_cb(GtkWidget *widget, gpointer data)
 {
 	inc_cancel((IncProgressDialog *)data);
 }
 
 static gint inc_dialog_delete_cb(GtkWidget *widget, GdkEventAny *event,
 				 gpointer data)
 {
 	IncProgressDialog *dialog = (IncProgressDialog *)data;
 
 	if (dialog->queue_list == NULL)
 		inc_progress_dialog_destroy(dialog);
 
 	return TRUE;
 }
 
 static gint inc_spool_account(PrefsAccount *account)
 {
 	FolderItem *inbox;
 	gchar *mbox;
 	gint result;
 
 	if (account->local_inbox) {
 		inbox = folder_find_item_from_identifier(account->local_inbox);
 		if (!inbox)
 			inbox = folder_get_default_inbox();
 	} else
 		inbox = folder_get_default_inbox();
 
 	if (account->local_mbox) {
 		if (is_file_exist(account->local_mbox))
 			mbox = g_strdup(account->local_mbox);
 		else if (is_dir_exist(account->local_mbox))
 			mbox = g_strconcat(account->local_mbox, G_DIR_SEPARATOR_S,
 					   g_get_user_name(), NULL);
 		else {
 			debug_print("%s: local mailbox not found.\n",
 				    account->local_mbox);
 			return -1;
 		}
 	} else {
 		debug_print("local mailbox not set in account info.\n");
 		return -1;
 	}
 
 	result = get_spool(inbox, mbox, account);
 	g_free(mbox);
 
 	statusbar_pop_all();
 
 	return result;
 }
 
 static gint get_spool(FolderItem *dest, const gchar *mbox, PrefsAccount *account)
 {
 	gint msgs, size;
 	gchar tmp_mbox[MAXPATHLEN + 1];
 
 	cm_return_val_if_fail(dest != NULL, -1);
 	cm_return_val_if_fail(mbox != NULL, -1);
 	cm_return_val_if_fail(account != NULL, -1);
 
 	if (!is_file_exist(mbox) || (size = get_file_size(mbox)) == 0) {
 		debug_print("%s: no messages\n", mbox);
 		return 0;
 	} else if (size < 0)
 		return -1;
 
 	g_snprintf(tmp_mbox, sizeof(tmp_mbox), "%s/tmpmbox.%p", get_tmp_dir(), mbox);
 
 	int spool = open(mbox, O_RDONLY);
 	if (flock(spool, LOCK_EX|LOCK_NB) < 0) {
 		perror("lock mbox");
 		return -1;
 	}
 	debug_print("Getting new messages from %s into %s...\n", mbox, dest->path);
 	if (copy_mbox(spool, tmp_mbox) < 0) {
 		perror("copy mbox");
 		flock(spool, LOCK_UN);
 		close(spool);
 		return -1;
 	}
 	close(spool);
 
 	msgs = proc_mbox(dest, tmp_mbox, account);
 	unlink(tmp_mbox);
 	if (msgs >= 0) {
 		if (truncate(mbox, 0) < 0)
 			perror("truncate mbox");
 	}
 
 	flock(spool, LOCK_UN);
 
 	return msgs;
 }
 
 void inc_lock_real(void)
 {
 	inc_lock_count++;
 }
 
 void inc_unlock_real(void)
 {
 	if (inc_lock_count > 0)
 		inc_lock_count--;
 }
 
 static guint autocheck_timer = 0;
 static gpointer autocheck_data = NULL;
 
 static void inc_notify_cmd(gint new_msgs, gboolean notify)
 {
 	gchar *buf, *numpos, *ret_str;
 	gssize by_read = 0, by_written = 0;
 
 	if (!(new_msgs && notify && prefs_common.newmail_notify_cmd &&
 	    *prefs_common.newmail_notify_cmd))
 		     return;
 
 	buf = g_strdup(prefs_common.newmail_notify_cmd);
 	if ((numpos = strstr(buf, "%d")) != NULL) {
 		gchar *buf2;
 
 		*numpos = '\0';
 		buf2 = g_strdup_printf("%s%d%s", buf, new_msgs, numpos + 2);
 		g_free(buf);
 		buf = buf2;
 	}
 
 	ret_str = g_locale_from_utf8(buf, strlen(buf), &by_read, &by_written,
 				     NULL);
 	if (ret_str) {
 		if (by_written) {
 			g_free(buf);
 			buf = ret_str;
 		} else
 			g_free(ret_str);
 	}
 	debug_print("executing new mail notification command: %s\n", buf);
 	execute_command_line(buf, TRUE, NULL);
 
 	g_free(buf);
 }
 
 gboolean inc_offline_should_override(gboolean force_ask, const gchar *msg)
 {
 	gint length = 10; /* seconds */
 	gint answer = G_ALERTDEFAULT;
 
 	if (force_ask) {
 		inc_offline_overridden_no = (time_t)0;
 	}
 
 	if (prefs_common.work_offline) {
 		gchar *tmp = NULL;
 
 		if (time(NULL) - inc_offline_overridden_yes < length * 60) /* seconds */
 			 return TRUE;
 		else if (time(NULL) - inc_offline_overridden_no < length * 60) /* seconds */
 			 return FALSE;
 
 		if (!force_ask) {
 			char buf[8];
 			char *unit = "seconds";
 
 			/* show the offline override time (length) using the must appropriate unit:
 			   the biggest unit possible (hours, minutes, seconds), provided that there
 			   is not inferior unit involved: 1 hour, 150 minutes, 25 minutes, 90 minutes,
 			   30 seconds, 90 seconds. */
 			if ((length / 3600) > 0) { /* hours? */
 				if (((length % 3600) % 60) == 0) { /* no seconds left? */
 					if ((length % 3600) > 0) { /* minutes left? */
 						length = length / 60;
 						unit = "minute";
 					} else {
 						length = length / 3600;
 						unit = "hour";
 					}
 				} /* else: seconds */
 			} else {
 				if ((length / 60) > 0) { /* minutes left? */
 					if ((length % 60) == 0) {
 						length = length / 60;
 						unit = "minute";
 					}
 				} /* else: seconds */
 			}
 			strlcpy(buf, unit, sizeof(buf));
 			if (length > 1)
 				strlcat(buf, "s", sizeof(buf));
 			tmp = g_strdup_printf("%s\nWorking offline. Override for %d %s?", msg, length, buf);
 		} else
 			tmp = g_strdup_printf("%sWorking offline. Override?", msg),
 
 		answer = alertpanel(_("Offline warning"),
 			       tmp,
 			       NULL, "Cancel", NULL, "Override",
 			       NULL, !force_ask? _("On_ly once"):NULL, ALERTFOCUS_SECOND);
 		g_free(tmp);
 		if (answer == G_ALERTALTERNATE) {
 			inc_offline_overridden_yes = time(NULL);
 			return TRUE;
 		} else if (answer == G_ALERTDEFAULT) {
 			if (!force_ask)
 				inc_offline_overridden_no  = time(NULL);
 			return FALSE;
 		} else {
 			inc_reset_offline_override_timers();
 			return TRUE;
 		}
 	}
 	return TRUE;
 }
 
 void inc_reset_offline_override_timers()
 {
 	debug_print("resetting offline override timers\n");
 	inc_offline_overridden_yes = (time_t)0;
 	inc_offline_overridden_no  = (time_t)0;
 }