sync with 0.7.5cvs16
[claws.git] / src / imap.c
index 3d4d910e7b2c68b2e40362df8e05a1b17ebc72fa..835e66c03a4747e17fe7ac679b997cd3f5e54e99 100644 (file)
@@ -31,6 +31,9 @@
 #include <unistd.h>
 #include <ctype.h>
 #include <time.h>
+#if HAVE_LIBJCONV
+#  include <jconv.h>
+#endif
 
 #include "intl.h"
 #include "imap.h"
 #define IMAPS_PORT     993
 #endif
 
-#define QUOTE_IF_REQUIRED(out, str) \
-{ \
-       if (*str != '"' && strchr(str, ' ')) { \
-               gchar *__tmp; \
-               gint len; \
- \
-               len = strlen(str) + 3; \
-               Xalloca(__tmp, len, return IMAP_ERROR); \
-               g_snprintf(__tmp, len, "\"%s\"", str); \
-               out = __tmp; \
-       } else { \
-               Xstrdup_a(out, str, return IMAP_ERROR); \
-       } \
+#define QUOTE_IF_REQUIRED(out, str)                            \
+{                                                              \
+       if (*str != '"' && strpbrk(str, " \t(){}%*") != NULL) { \
+               gchar *__tmp;                                   \
+               gint len;                                       \
                                                              \
+               len = strlen(str) + 3;                          \
+               Xalloca(__tmp, len, return IMAP_ERROR);         \
+               g_snprintf(__tmp, len, "\"%s\"", str);          \
+               out = __tmp;                                    \
+       } else {                                                \
+               Xstrdup_a(out, str, return IMAP_ERROR);         \
+       }                                                       \
 }
 
 static GList *session_list = NULL;
@@ -77,11 +80,15 @@ static void imap_folder_init                (Folder         *folder,
 static IMAPSession *imap_session_get   (Folder         *folder);
 
 static gint imap_scan_tree_recursive   (IMAPSession    *session,
-                                        FolderItem     *item,
-                                        IMAPNameSpace  *namespace);
+                                        FolderItem     *item);
 static GSList *imap_parse_list         (IMAPSession    *session,
-                                        const gchar    *path);
-static gint imap_create_trash          (Folder         *folder);
+                                        const gchar    *real_path);
+
+static void imap_create_missing_folders        (Folder                 *folder);
+static FolderItem *imap_create_special_folder
+                                       (Folder                 *folder,
+                                        SpecialFolderItemType   stype,
+                                        const gchar            *name);
 
 static gint imap_do_copy               (Folder         *folder,
                                         FolderItem     *dest,
@@ -136,13 +143,16 @@ static gint imap_status                   (IMAPSession    *session,
                                         const gchar    *path,
                                         gint           *messages,
                                         gint           *recent,
-                                        gint           *unseen,
-                                        guint32        *uid_validity);
+                                        guint32        *uid_next,
+                                        guint32        *uid_validity,
+                                        gint           *unseen);
 
 static void imap_parse_namespace               (IMAPSession    *session,
                                                 IMAPFolder     *folder);
 static IMAPNameSpace *imap_find_namespace      (IMAPFolder     *folder,
                                                 const gchar    *path);
+static gchar imap_get_path_separator           (IMAPFolder     *folder,
+                                                const gchar    *path);
 static gchar *imap_get_real_path               (IMAPFolder     *folder,
                                                 const gchar    *path);
 
@@ -200,6 +210,9 @@ static gint imap_cmd_examine        (SockInfo       *sock,
                                 guint32        *uid_validity);
 static gint imap_cmd_create    (SockInfo       *sock,
                                 const gchar    *folder);
+static gint imap_cmd_rename    (SockInfo       *sock,
+                                const gchar    *oldfolder,
+                                const gchar    *newfolder);
 static gint imap_cmd_delete    (SockInfo       *sock,
                                 const gchar    *folder);
 static gint imap_cmd_envelope  (SockInfo       *sock,
@@ -250,6 +263,12 @@ static gchar *search_array_starts          (GPtrArray *array,
 static void imap_path_separator_subst          (gchar          *str,
                                                 gchar           separator);
 
+static gchar *imap_modified_utf7_to_locale     (const gchar    *mutf7_str);
+static gchar *imap_locale_to_modified_utf7     (const gchar    *from);
+
+static gboolean imap_rename_folder_func                (GNode          *node,
+                                                gpointer        data);
+
 
 Folder *imap_folder_new(const gchar *name, const gchar *path)
 {
@@ -282,10 +301,12 @@ static void imap_folder_init(Folder *folder, const gchar *name,
        folder->copy_msgs_with_dest = imap_copy_msgs_with_dest;
        folder->remove_msg          = imap_remove_msg;
        folder->remove_all_msg      = imap_remove_all_msg;
+       folder->is_msg_changed      = imap_is_msg_changed;
        folder->scan                = imap_scan_folder;
        folder->scan_tree           = imap_scan_tree;
        folder->create_tree         = imap_create_tree;
        folder->create_folder       = imap_create_folder;
+       folder->rename_folder       = imap_rename_folder;
        folder->remove_folder       = imap_remove_folder;
 }
 
@@ -445,7 +466,7 @@ void imap_session_destroy_all(void)
                IMAPSession *session = (IMAPSession *)session_list->data;
 
                imap_cmd_logout(SESSION(session)->sock);
-               imap_session_destroy(session);
+               session_destroy(SESSION(session));
        }
 }
 
@@ -571,6 +592,15 @@ gchar *imap_fetch_msg(Folder *folder, FolderItem *item, gint uid)
                return NULL;
        }
 
+       ok = imap_select(session, IMAP_FOLDER(folder), item->path,
+                        NULL, NULL, NULL, NULL);
+       statusbar_pop_all();
+       if (ok != IMAP_SUCCESS) {
+               g_warning(_("can't select mailbox %s\n"), item->path);
+               g_free(filename);
+               return NULL;
+       }
+
        debug_print(_("getting message %d...\n"), uid);
        ok = imap_cmd_fetch(SESSION(session)->sock, (guint32)uid, filename);
 
@@ -590,6 +620,8 @@ gint imap_add_msg(Folder *folder, FolderItem *dest, const gchar *file,
 {
        gchar *destdir;
        IMAPSession *session;
+       gint messages, recent, unseen;
+       guint32 uid_next, uid_validity;
        gint ok;
 
        g_return_val_if_fail(folder != NULL, -1);
@@ -599,6 +631,14 @@ gint imap_add_msg(Folder *folder, FolderItem *dest, const gchar *file,
        session = imap_session_get(folder);
        if (!session) return -1;
 
+       ok = imap_status(session, IMAP_FOLDER(folder), dest->path,
+                        &messages, &recent, &uid_next, &uid_validity, &unseen);
+       statusbar_pop_all();
+       if (ok != IMAP_SUCCESS) {
+               g_warning(_("can't append message %s\n"), file);
+               return -1;
+       }
+
        destdir = imap_get_real_path(IMAP_FOLDER(folder), dest->path);
        ok = imap_cmd_append(SESSION(session)->sock, destdir, file);
        g_free(destdir);
@@ -613,7 +653,7 @@ gint imap_add_msg(Folder *folder, FolderItem *dest, const gchar *file,
                        FILE_OP_ERROR(file, "unlink");
        }
 
-       return 0;
+       return uid_next;
 }
 
 static gint imap_do_copy(Folder *folder, FolderItem *dest, MsgInfo *msginfo,
@@ -724,13 +764,51 @@ static gint imap_do_copy_msgs_with_dest(Folder *folder, FolderItem *dest,
 
 gint imap_move_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
 {
-       return imap_do_copy(folder, dest, msginfo, TRUE);
+       gchar *srcfile;
+       gint ret = 0;
+
+       g_return_val_if_fail(folder != NULL, -1);
+       g_return_val_if_fail(dest != NULL, -1);
+       g_return_val_if_fail(msginfo != NULL, -1);
+       g_return_val_if_fail(msginfo->folder != NULL, -1);
+
+       if (folder == msginfo->folder->folder)
+               return imap_do_copy(folder, dest, msginfo, TRUE);
+
+       srcfile = procmsg_get_message_file(msginfo);
+       if (!srcfile) return -1;
+
+       ret = imap_add_msg(folder, dest, srcfile, FALSE);
+       g_free(srcfile);
+
+       if (ret == 0)
+               ret = folder_item_remove_msg(msginfo->folder, msginfo->msgnum);
+
+       return ret;
 }
 
 gint imap_move_msgs_with_dest(Folder *folder, FolderItem *dest, 
                              GSList *msglist)
 {
-       return imap_do_copy_msgs_with_dest(folder, dest, msglist, TRUE);
+       MsgInfo *msginfo;
+       GSList *cur;
+       gint ret = 0;
+
+       g_return_val_if_fail(folder != NULL, -1);
+       g_return_val_if_fail(dest != NULL, -1);
+       g_return_val_if_fail(msglist != NULL, -1);
+
+       msginfo = (MsgInfo *)msglist->data;
+       if (folder == msginfo->folder->folder)
+               return imap_do_copy_msgs_with_dest(folder, dest, msglist, TRUE);
+
+       for (cur = msglist; cur != NULL; cur = cur->next) {
+               msginfo = (MsgInfo *)cur->data;
+               ret = imap_move_msg(folder, dest, msginfo);
+               if (ret != 0) break;
+       }
+
+       return ret;
 }
 
 gint imap_copy_msg(Folder *folder, FolderItem *dest, MsgInfo *msginfo)
@@ -860,36 +938,44 @@ gint imap_remove_all_msg(Folder *folder, FolderItem *item)
        return IMAP_SUCCESS;
 }
 
-void imap_scan_folder(Folder *folder, FolderItem *item)
+gboolean imap_is_msg_changed(Folder *folder, FolderItem *item, MsgInfo *msginfo)
+{
+       /* TODO: properly implement this method */
+       return FALSE;
+}
+
+gint imap_scan_folder(Folder *folder, FolderItem *item)
 {
        IMAPSession *session;
        gint messages, recent, unseen;
-       guint32 uid_validity;
+       guint32 uid_next, uid_validity;
        gint ok;
 
-       g_return_if_fail(folder != NULL);
-       g_return_if_fail(item != NULL);
+       g_return_val_if_fail(folder != NULL, -1);
+       g_return_val_if_fail(item != NULL, -1);
 
        session = imap_session_get(folder);
-       if (!session) return;
+       if (!session) return -1;
 
        ok = imap_status(session, IMAP_FOLDER(folder), item->path,
-                        &messages, &recent, &unseen, &uid_validity);
+                        &messages, &recent, &uid_next, &uid_validity, &unseen);
        statusbar_pop_all();
-       if (ok != IMAP_SUCCESS) return;
+       if (ok != IMAP_SUCCESS) return -1;
 
-       item->new = recent;
+       item->new = unseen > 0 ? recent : 0;
        item->unread = unseen;
        item->total = messages;
+       item->last_num = (messages > 0 && uid_next > 0) ? uid_next - 1 : 0;
        /* item->mtime = uid_validity; */
+
+       return 0;
 }
 
 void imap_scan_tree(Folder *folder)
 {
        IMAPFolder *imapfolder = IMAP_FOLDER(folder);
-       FolderItem *item, *inbox;
+       FolderItem *item;
        IMAPSession *session;
-       IMAPNameSpace *namespace = NULL;
        gchar *root_folder = NULL;
 
        g_return_if_fail(folder != NULL);
@@ -898,13 +984,15 @@ void imap_scan_tree(Folder *folder)
        session = imap_session_get(folder);
        if (!session) return;
 
-       if (imapfolder->namespace && imapfolder->namespace->data)
-               namespace = (IMAPNameSpace *)imapfolder->namespace->data;
-
        if (folder->account->imap_dir && *folder->account->imap_dir) {
                gchar *imap_dir;
+               IMAPNameSpace *namespace = NULL;
+
                Xstrdup_a(imap_dir, folder->account->imap_dir, return);
                strtailchomp(imap_dir, '/');
+
+               if (imapfolder->ns_personal && imapfolder->ns_personal->data)
+                       namespace = (IMAPNameSpace *)imapfolder->ns_personal->data;
                root_folder = g_strconcat
                        (namespace && namespace->name ? namespace->name : "",
                         imap_dir, NULL);
@@ -921,41 +1009,33 @@ void imap_scan_tree(Folder *folder)
        folder->node = g_node_new(item);
        g_free(root_folder);
 
-       imap_scan_tree_recursive(session, item, namespace);
+       imap_scan_tree_recursive(session, item);
 
-       if (!folder->inbox) {
-               inbox = folder_item_new("INBOX", "INBOX");
-               inbox->stype = F_INBOX;
-               folder_item_append(item, inbox);
-               folder->inbox = inbox;
-       }
-       if (!folder->trash)
-               imap_create_trash(folder);
+       imap_create_missing_folders(folder);
 }
 
-static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item,
-                                    IMAPNameSpace *namespace)
+static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item)
 {
+       Folder *folder;
        IMAPFolder *imapfolder;
        FolderItem *new_item;
        GSList *item_list, *cur;
        gchar *real_path;
        gchar *wildcard_path;
-       gchar separator = '/';
+       gchar separator;
        gchar wildcard[3];
 
        g_return_val_if_fail(item != NULL, -1);
        g_return_val_if_fail(item->folder != NULL, -1);
        g_return_val_if_fail(item->no_sub == FALSE, -1);
 
-       imapfolder = IMAP_FOLDER(item->folder);
+       folder = FOLDER(item->folder);
+       imapfolder = IMAP_FOLDER(folder);
 
-       if (namespace && namespace->separator)
-               separator = namespace->separator;
+       separator = imap_get_path_separator(imapfolder, item->path);
 
        if (item->folder->ui_func)
-               item->folder->ui_func(item->folder, item,
-                                     item->folder->ui_func_data);
+               item->folder->ui_func(folder, item, folder->ui_func_data);
 
        if (item->path) {
                wildcard[0] = separator;
@@ -965,8 +1045,7 @@ static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item,
        } else {
                wildcard[0] = '%';
                wildcard[1] = '\0';
-               real_path = g_strdup(namespace && namespace->name
-                                    ? namespace->name : "");
+               real_path = g_strdup("");
        }
 
        Xstrcat_a(wildcard_path, real_path, wildcard,
@@ -983,41 +1062,56 @@ static gint imap_scan_tree_recursive(IMAPSession *session, FolderItem *item,
        for (cur = item_list; cur != NULL; cur = cur->next) {
                new_item = cur->data;
                if (!strcmp(new_item->path, "INBOX")) {
-                       if (!item->folder->inbox) {
+                       if (!folder->inbox) {
                                new_item->stype = F_INBOX;
                                item->folder->inbox = new_item;
                        } else {
                                folder_item_destroy(new_item);
                                continue;
                        }
-               } else if (!item->parent && !item->folder->trash) {
-                       if (!strcasecmp(g_basename(new_item->path), "Trash")) {
+               } else if (!item->parent || item->stype == F_INBOX) {
+                       gchar *base;
+
+                       base = g_basename(new_item->path);
+
+                       if (!folder->outbox && !strcasecmp(base, "Sent")) {
+                               new_item->stype = F_OUTBOX;
+                               folder->outbox = new_item;
+                       } else if (!folder->draft && !strcasecmp(base, "Drafts")) {
+                               new_item->stype = F_DRAFT;
+                               folder->draft = new_item;
+                       } else if (!folder->queue && !strcasecmp(base, "Queue")) {
+                               new_item->stype = F_QUEUE;
+                               folder->queue = new_item;
+                       } else if (!folder->trash && !strcasecmp(base, "Trash")) {
                                new_item->stype = F_TRASH;
-                               item->folder->trash = new_item;
+                               folder->trash = new_item;
                        }
                }
                folder_item_append(item, new_item);
                if (new_item->no_select == FALSE)
-                       imap_scan_folder(new_item->folder, new_item);
+                       imap_scan_folder(folder, new_item);
                if (new_item->no_sub == FALSE)
-                       imap_scan_tree_recursive(session, new_item, namespace);
+                       imap_scan_tree_recursive(session, new_item);
        }
 
        return IMAP_SUCCESS;
 }
 
-static GSList *imap_parse_list(IMAPSession *session, const gchar *path)
+static GSList *imap_parse_list(IMAPSession *session, const gchar *real_path)
 {
        gchar buf[IMAPBUFSIZE];
        gchar flags[256];
        gchar separator[16];
        gchar *p;
        gchar *name;
+       gchar *loc_name, *loc_path;
        GSList *item_list = NULL;
        GString *str;
        FolderItem *new_item;
 
-       debug_print("getting list of %s ...\n", *path ? path : "\"\"");
+       debug_print("getting list of %s ...\n",
+                   *real_path ? real_path : "\"\"");
 
        str = g_string_new(NULL);
 
@@ -1059,22 +1153,27 @@ static GSList *imap_parse_list(IMAPSession *session, const gchar *path)
                        strncpy2(buf, p, sizeof(buf));
                strtailchomp(buf, separator[0]);
                if (buf[0] == '\0') continue;
-               if (!strcmp(buf, path)) continue;
+               if (!strcmp(buf, real_path)) continue;
 
                if (separator[0] != '\0')
                        subst_char(buf, separator[0], '/');
                name = g_basename(buf);
                if (name[0] == '.') continue;
 
-               new_item = folder_item_new(name, buf);
+               loc_name = imap_modified_utf7_to_locale(name);
+               loc_path = imap_modified_utf7_to_locale(buf);
+               new_item = folder_item_new(loc_name, loc_path);
                if (strcasestr(flags, "\\Noinferiors") != NULL)
                        new_item->no_sub = TRUE;
-               if (strcasestr(flags, "\\Noselect") != NULL)
+               if (strcmp(buf, "INBOX") != 0 &&
+                   strcasestr(flags, "\\Noselect") != NULL)
                        new_item->no_select = TRUE;
 
                item_list = g_slist_append(item_list, new_item);
 
-               debug_print("folder %s has been added.\n", buf);
+               debug_print("folder %s has been added.\n", loc_path);
+               g_free(loc_path);
+               g_free(loc_name);
        }
 
        g_string_free(str, TRUE);
@@ -1085,100 +1184,78 @@ static GSList *imap_parse_list(IMAPSession *session, const gchar *path)
 
 gint imap_create_tree(Folder *folder)
 {
-       FolderItem *item;
-
        g_return_val_if_fail(folder != NULL, -1);
        g_return_val_if_fail(folder->node != NULL, -1);
        g_return_val_if_fail(folder->node->data != NULL, -1);
        g_return_val_if_fail(folder->account != NULL, -1);
 
        imap_scan_tree(folder);
+       imap_create_missing_folders(folder);
 
-       item = FOLDER_ITEM(folder->node->data);
+       return 0;
+}
 
-       if (!folder->inbox) {
-               FolderItem *inbox;
+static void imap_create_missing_folders(Folder *folder)
+{
+       g_return_if_fail(folder != NULL);
 
-               inbox = folder_item_new("INBOX", "INBOX");
-               inbox->stype = F_INBOX;
-               folder_item_append(item, inbox);
-               folder->inbox = inbox;
-       }
+       if (!folder->inbox)
+               folder->inbox = imap_create_special_folder
+                       (folder, F_INBOX, "INBOX");
+#if 0
+       if (!folder->outbox)
+               folder->outbox = imap_create_special_folder
+                       (folder, F_OUTBOX, "Sent");
+       if (!folder->draft)
+               folder->draft = imap_create_special_folder
+                       (folder, F_DRAFT, "Drafts");
+       if (!folder->queue)
+               folder->queue = imap_create_special_folder
+                       (folder, F_QUEUE, "Queue");
+#endif
        if (!folder->trash)
-               imap_create_trash(folder);
-
-       return 0;
+               folder->trash = imap_create_special_folder
+                       (folder, F_TRASH, "Trash");
 }
 
-static gint imap_create_trash(Folder *folder)
+static FolderItem *imap_create_special_folder(Folder *folder,
+                                             SpecialFolderItemType stype,
+                                             const gchar *name)
 {
-       IMAPFolder *imapfolder = IMAP_FOLDER(folder);
        FolderItem *item;
        FolderItem *new_item;
-       gchar *trash_path;
-       gchar *imap_dir = "";
-
-       g_return_val_if_fail(folder != NULL, -1);
-       g_return_val_if_fail(folder->node != NULL, -1);
-       g_return_val_if_fail(folder->node->data != NULL, -1);
-       g_return_val_if_fail(folder->account != NULL, -1);
-
-       if (folder->account->imap_dir && *folder->account->imap_dir) {
-               gchar *tmpdir;
 
-               Xstrdup_a(tmpdir, folder->account->imap_dir, return -1);
-               strtailchomp(tmpdir, '/');
-               Xalloca(imap_dir, strlen(tmpdir) + 2, return -1);
-               g_snprintf(imap_dir, strlen(tmpdir) + 2, "%s%c", tmpdir, '/');
-       }
-
-       if (imapfolder->namespace && imapfolder->namespace->data) {
-               IMAPNameSpace *namespace =
-                       (IMAPNameSpace *)imapfolder->namespace->data;
-
-               if (*namespace->name != '\0') {
-                       gchar *name;
-
-                       Xstrdup_a(name, namespace->name, return -1);
-                       subst_char(name, namespace->separator, '/');
-                       trash_path = g_strconcat(name, imap_dir, "Trash", NULL);
-               } else
-                       trash_path = g_strconcat(imap_dir, "Trash", NULL);
-       } else
-               trash_path = g_strconcat(imap_dir, "Trash", NULL);
+       g_return_val_if_fail(folder != NULL, NULL);
+       g_return_val_if_fail(folder->node != NULL, NULL);
+       g_return_val_if_fail(folder->node->data != NULL, NULL);
+       g_return_val_if_fail(folder->account != NULL, NULL);
+       g_return_val_if_fail(name != NULL, NULL);
 
        item = FOLDER_ITEM(folder->node->data);
-       new_item = imap_create_folder(folder, item, trash_path);
+       new_item = imap_create_folder(folder, item, name);
 
        if (!new_item) {
-               gchar *path;
-
-               new_item = folder_item_new("Trash", trash_path);
-               folder_item_append(item, new_item);
+               g_warning(_("Can't create '%s'\n"), name);
+               if (!folder->inbox) return NULL;
 
-               path = folder_item_get_path(new_item);
-               if (!is_dir_exist(path))
-                       make_dir_hier(path);
-               g_free(path);
-       } else {
-               g_free(new_item->name);
-               new_item->name = g_strdup("Trash");
-       }
-       new_item->stype = F_TRASH;
-       folder->trash = new_item;
-
-       g_free(trash_path);
+               new_item = imap_create_folder(folder, folder->inbox, name);
+               if (!new_item)
+                       g_warning(_("Can't create '%s' under INBOX\n"), name);
+               else
+                       new_item->stype = stype;
+       } else
+               new_item->stype = stype;
 
-       return 0;
+       return new_item;
 }
 
 FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
                               const gchar *name)
 {
-       gchar *dirpath, *imappath;
+       gchar *dirpath, *imap_path;
        IMAPSession *session;
-       IMAPNameSpace *namespace;
        FolderItem *new_item;
+       gchar separator;
        gchar *new_name;
        const gchar *p;
        gint ok;
@@ -1191,7 +1268,9 @@ FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
        session = imap_session_get(folder);
        if (!session) return NULL;
 
-       if (parent->path)
+       if (!parent->parent && strcmp(name, "INBOX") == 0)
+               dirpath = g_strdup(name);
+       else if (parent->path)
                dirpath = g_strconcat(parent->path, "/", name, NULL);
        else if ((p = strchr(name, '/')) != NULL && *(p + 1) != '\0')
                dirpath = g_strdup(name);
@@ -1204,15 +1283,13 @@ FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
        } else
                dirpath = g_strdup(name);
 
-       Xstrdup_a(imappath, dirpath, {g_free(dirpath); return NULL;});
-       Xstrdup_a(new_name, name, {g_free(dirpath); return NULL;});
-       namespace = imap_find_namespace(IMAP_FOLDER(folder), imappath);
-       if (namespace && namespace->separator) {
-               imap_path_separator_subst(imappath, namespace->separator);
-               imap_path_separator_subst(new_name, namespace->separator);
-               strtailchomp(new_name, namespace->separator);
-       }
        strtailchomp(dirpath, '/');
+       imap_path = imap_locale_to_modified_utf7(dirpath);
+       Xstrdup_a(new_name, name, {g_free(dirpath); return NULL;});
+       strtailchomp(new_name, '/');
+       separator = imap_get_path_separator(IMAP_FOLDER(folder), imap_path);
+       imap_path_separator_subst(imap_path, separator);
+       subst_char(new_name, '/', separator);
 
        if (strcmp(name, "INBOX") != 0) {
                GPtrArray *argbuf;
@@ -1220,11 +1297,12 @@ FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
                gboolean exist = FALSE;
 
                argbuf = g_ptr_array_new();
-               ok = imap_cmd_list(SESSION(session)->sock, NULL, imappath,
+               ok = imap_cmd_list(SESSION(session)->sock, NULL, imap_path,
                                   argbuf);
                statusbar_pop_all();
                if (ok != IMAP_SUCCESS) {
                        log_warning(_("can't create mailbox: LIST failed\n"));
+                       g_free(imap_path);
                        g_free(dirpath);
                        g_ptr_array_free(argbuf, TRUE);
                        return NULL;
@@ -1241,10 +1319,11 @@ FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
                g_ptr_array_free(argbuf, TRUE);
 
                if (!exist) {
-                       ok = imap_cmd_create(SESSION(session)->sock, imappath);
+                       ok = imap_cmd_create(SESSION(session)->sock, imap_path);
                        statusbar_pop_all();
                        if (ok != IMAP_SUCCESS) {
                                log_warning(_("can't create mailbox\n"));
+                               g_free(imap_path);
                                g_free(dirpath);
                                return NULL;
                        }
@@ -1253,6 +1332,7 @@ FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
 
        new_item = folder_item_new(new_name, dirpath);
        folder_item_append(parent, new_item);
+       g_free(imap_path);
        g_free(dirpath);
 
        dirpath = folder_item_get_path(new_item);
@@ -1263,11 +1343,99 @@ FolderItem *imap_create_folder(Folder *folder, FolderItem *parent,
        return new_item;
 }
 
+gint imap_rename_folder(Folder *folder, FolderItem *item, const gchar *name)
+{
+       gchar *dirpath;
+       gchar *newpath;
+       gchar *real_oldpath;
+       gchar *real_newpath;
+       GNode *node;
+       gchar *paths[2];
+       gchar *old_cache_dir;
+       gchar *new_cache_dir;
+       IMAPSession *session;
+       gchar separator;
+       gint ok;
+       gint exists, recent, unseen;
+       guint32 uid_validity;
+
+       g_return_val_if_fail(folder != NULL, -1);
+       g_return_val_if_fail(item != NULL, -1);
+       g_return_val_if_fail(item->path != NULL, -1);
+       g_return_val_if_fail(name != NULL, -1);
+
+       session = imap_session_get(folder);
+       if (!session) return -1;
+
+       real_oldpath = imap_get_real_path(IMAP_FOLDER(folder), item->path);
+
+       g_free(session->mbox);
+       session->mbox = NULL;
+       ok = imap_cmd_examine(SESSION(session)->sock, "INBOX",
+                             &exists, &recent, &unseen, &uid_validity);
+       statusbar_pop_all();
+       if (ok != IMAP_SUCCESS) {
+               g_free(real_oldpath);
+               return -1;
+       }
+
+       separator = imap_get_path_separator(IMAP_FOLDER(folder), item->path);
+       if (strchr(item->path, G_DIR_SEPARATOR)) {
+               dirpath = g_dirname(item->path);
+               newpath = g_strconcat(dirpath, G_DIR_SEPARATOR_S, name, NULL);
+               g_free(dirpath);
+       } else
+               newpath = g_strdup(name);
+
+       real_newpath = imap_locale_to_modified_utf7(newpath);
+       imap_path_separator_subst(real_newpath, separator);
+
+       ok = imap_cmd_rename(SESSION(session)->sock, real_oldpath, real_newpath);
+       statusbar_pop_all();
+       if (ok != IMAP_SUCCESS) {
+               log_warning(_("can't rename mailbox: %s to %s\n"),
+                           real_oldpath, real_newpath);
+               g_free(real_oldpath);
+               g_free(newpath);
+               g_free(real_newpath);
+               return -1;
+       }
+
+       g_free(item->name);
+       item->name = g_strdup(name);
+
+       old_cache_dir = folder_item_get_path(item);
+
+       node = g_node_find(item->folder->node, G_PRE_ORDER, G_TRAVERSE_ALL,
+                          item);
+       paths[0] = g_strdup(item->path);
+       paths[1] = newpath;
+       g_node_traverse(node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
+                       imap_rename_folder_func, paths);
+
+       if (is_dir_exist(old_cache_dir)) {
+               new_cache_dir = folder_item_get_path(item);
+               if (rename(old_cache_dir, new_cache_dir) < 0) {
+                       FILE_OP_ERROR(old_cache_dir, "rename");
+               }
+               g_free(new_cache_dir);
+       }
+
+       g_free(old_cache_dir);
+       g_free(paths[0]);
+       g_free(newpath);
+       g_free(real_oldpath);
+       g_free(real_newpath);
+
+       return 0;
+}
+
 gint imap_remove_folder(Folder *folder, FolderItem *item)
 {
        gint ok;
        IMAPSession *session;
        gchar *path;
+       gchar *cache_dir;
        gint exists, recent, unseen;
        guint32 uid_validity;
 
@@ -1297,6 +1465,10 @@ gint imap_remove_folder(Folder *folder, FolderItem *item)
        }
 
        g_free(path);
+       cache_dir = folder_item_get_path(item);
+       if (is_dir_exist(cache_dir) && remove_dir_recursive(cache_dir) < 0)
+               g_warning("can't remove directory '%s'\n", cache_dir);
+       g_free(cache_dir);
        folder_item_remove(item);
 
        return 0;
@@ -1333,11 +1505,18 @@ static GSList *imap_get_uncached_messages(IMAPSession *session,
                        return newlist;
                }
                strretchomp(tmp);
-               log_print("IMAP4< %s\n", tmp);
                if (tmp[0] != '*' || tmp[1] != ' ') {
+                       log_print("IMAP4< %s\n", tmp);
                        g_free(tmp);
                        break;
                }
+               if (strstr(tmp, "FETCH") == NULL) {
+                       log_print("IMAP4< %s\n", tmp);
+                       g_free(tmp);
+                       continue;
+               }
+               /* log_print("IMAP4< %s\n", tmp); */
+               debug_print("IMAP4< %s\n", tmp);
                g_string_assign(str, tmp);
                g_free(tmp);
 
@@ -1346,6 +1525,11 @@ static GSList *imap_get_uncached_messages(IMAPSession *session,
                        log_warning(_("can't parse envelope: %s\n"), str->str);
                        continue;
                }
+               if (item->stype == F_QUEUE) {
+                       MSG_SET_TMP_FLAGS(msginfo->flags, MSG_QUEUED);
+               } else if (item->stype == F_DRAFT) {
+                       MSG_SET_TMP_FLAGS(msginfo->flags, MSG_DRAFT);
+               }
 
                msginfo->folder = item;
 
@@ -1422,6 +1606,8 @@ static SockInfo *imap_open_tunnel(const gchar *server,
        SockInfo *sock;
 
        if ((sock = sock_connect_cmd(server, tunnelcmd)) == NULL)
+               log_warning(_("Can't establish IMAP4 session with: %s\n"),
+                           server);
                return NULL;
 
        return imap_init_sock(sock);
@@ -1445,6 +1631,8 @@ static SockInfo *imap_open(const gchar *server, gushort port)
 
 #if USE_SSL
        if (use_ssl && !ssl_init_socket(sock)) {
+               log_warning(_("Can't establish IMAP4 session with: %s:%d\n"),
+                           server, port);
                sock_close(sock);
                return NULL;
        }
@@ -1459,6 +1647,7 @@ static SockInfo *imap_init_sock(SockInfo *sock)
        imap_cmd_count = 0;
 
        if (imap_cmd_noop(sock) != IMAP_SUCCESS) {
+               log_warning(_("Can't establish IMAP4 session\n"));
                sock_close(sock);
                return NULL;
        }
@@ -1466,94 +1655,96 @@ static SockInfo *imap_init_sock(SockInfo *sock)
        return sock;
 }
 
-
-
-#define THROW goto catch
-
-static void imap_parse_namespace(IMAPSession *session, IMAPFolder *folder)
+static GList *imap_parse_namespace_str(gchar *str)
 {
-       gchar *ns_str;
+       gchar *p = str;
        gchar *name;
        gchar *separator;
-       gchar *p;
        IMAPNameSpace *namespace;
        GList *ns_list = NULL;
 
-       g_return_if_fail(session != NULL);
-       g_return_if_fail(folder != NULL);
-
-       if (folder->namespace != NULL) return;
-
-       if (imap_cmd_namespace(SESSION(session)->sock, &ns_str)
-           != IMAP_SUCCESS) {
-               log_warning(_("can't get namespace\n"));
-               return;
-       }
-
-       /* get the first element */
-       extract_one_parenthesis_with_skip_quote(ns_str, '"', '(', ')');
-       g_strstrip(ns_str);
-       p = ns_str;
-
        while (*p != '\0') {
                /* parse ("#foo" "/") */
 
                while (*p && *p != '(') p++;
-               if (*p == '\0') THROW;
+               if (*p == '\0') break;
                p++;
 
                while (*p && *p != '"') p++;
-               if (*p == '\0') THROW;
+               if (*p == '\0') break;
                p++;
                name = p;
 
                while (*p && *p != '"') p++;
-               if (*p == '\0') THROW;
+               if (*p == '\0') break;
                *p = '\0';
                p++;
 
                while (*p && isspace(*p)) p++;
-               if (*p == '\0') THROW;
+               if (*p == '\0') break;
                if (strncmp(p, "NIL", 3) == 0)
                        separator = NULL;
                else if (*p == '"') {
                        p++;
                        separator = p;
                        while (*p && *p != '"') p++;
-                       if (*p == '\0') THROW;
+                       if (*p == '\0') break;
                        *p = '\0';
                        p++;
-               } else THROW;
+               } else break;
 
                while (*p && *p != ')') p++;
-               if (*p == '\0') THROW;
+               if (*p == '\0') break;
                p++;
 
                namespace = g_new(IMAPNameSpace, 1);
                namespace->name = g_strdup(name);
                namespace->separator = separator ? separator[0] : '\0';
                ns_list = g_list_append(ns_list, namespace);
-               IMAP_FOLDER(folder)->namespace = ns_list;
        }
 
-catch:
-       g_free(ns_str);
-       return;
+       return ns_list;
 }
 
-#undef THROW
+static void imap_parse_namespace(IMAPSession *session, IMAPFolder *folder)
+{
+       gchar *ns_str;
+       gchar **str_array;
 
-static IMAPNameSpace *imap_find_namespace(IMAPFolder *folder,
-                                         const gchar *path)
+       g_return_if_fail(session != NULL);
+       g_return_if_fail(folder != NULL);
+
+       if (folder->ns_personal != NULL ||
+           folder->ns_others   != NULL ||
+           folder->ns_shared   != NULL)
+               return;
+
+       if (imap_cmd_namespace(SESSION(session)->sock, &ns_str)
+           != IMAP_SUCCESS) {
+               log_warning(_("can't get namespace\n"));
+               return;
+       }
+
+       str_array = strsplit_parenthesis(ns_str, '(', ')', 3);
+       if (str_array[0])
+               folder->ns_personal = imap_parse_namespace_str(str_array[0]);
+       if (str_array[0] && str_array[1])
+               folder->ns_others = imap_parse_namespace_str(str_array[1]);
+       if (str_array[0] && str_array[1] && str_array[2])
+               folder->ns_shared = imap_parse_namespace_str(str_array[2]);
+       g_strfreev(str_array);
+       return;
+}
+
+static IMAPNameSpace *imap_find_namespace_from_list(GList *ns_list,
+                                                   const gchar *path)
 {
        IMAPNameSpace *namespace = NULL;
-       GList *ns_list;
-       gchar *name;
+       gchar *tmp_path, *name;
 
-       g_return_val_if_fail(folder != NULL, NULL);
-       g_return_val_if_fail(path != NULL, NULL);
+       if (!path) path = "";
 
-       ns_list = folder->namespace;
+       Xstrcat_a(tmp_path, path, "/", return NULL);
 
        for (; ns_list != NULL; ns_list = ns_list->next) {
                IMAPNameSpace *tmp_ns = ns_list->data;
@@ -1561,25 +1752,53 @@ static IMAPNameSpace *imap_find_namespace(IMAPFolder *folder,
                Xstrdup_a(name, tmp_ns->name, return namespace);
                if (tmp_ns->separator && tmp_ns->separator != '/')
                        subst_char(name, tmp_ns->separator, '/');
-               if (strncmp(path, name, strlen(name)) == 0)
+               if (strncmp(tmp_path, name, strlen(name)) == 0)
                        namespace = tmp_ns;
        }
 
        return namespace;
 }
 
-static gchar *imap_get_real_path(IMAPFolder *folder, const gchar *path)
+static IMAPNameSpace *imap_find_namespace(IMAPFolder *folder,
+                                         const gchar *path)
 {
-       gchar *real_path;
        IMAPNameSpace *namespace;
 
        g_return_val_if_fail(folder != NULL, NULL);
-       g_return_val_if_fail(path != NULL, NULL);
 
-       real_path = g_strdup(path);
+       namespace = imap_find_namespace_from_list(folder->ns_personal, path);
+       if (namespace) return namespace;
+       namespace = imap_find_namespace_from_list(folder->ns_others, path);
+       if (namespace) return namespace;
+       namespace = imap_find_namespace_from_list(folder->ns_shared, path);
+       if (namespace) return namespace;
+
+       return NULL;
+}
+
+static gchar imap_get_path_separator(IMAPFolder *folder, const gchar *path)
+{
+       IMAPNameSpace *namespace;
+       gchar separator = '/';
+
        namespace = imap_find_namespace(folder, path);
        if (namespace && namespace->separator)
-               imap_path_separator_subst(real_path, namespace->separator);
+               separator = namespace->separator;
+
+       return separator;
+}
+
+static gchar *imap_get_real_path(IMAPFolder *folder, const gchar *path)
+{
+       gchar *real_path;
+       gchar separator;
+
+       g_return_val_if_fail(folder != NULL, NULL);
+       g_return_val_if_fail(path != NULL, NULL);
+
+       real_path = imap_locale_to_modified_utf7(path);
+       separator = imap_get_path_separator(folder, path);
+       imap_path_separator_subst(real_path, separator);
 
        return real_path;
 }
@@ -1588,10 +1807,24 @@ static gchar *imap_parse_atom(SockInfo *sock, gchar *src,
                              gchar *dest, gint dest_len, GString *str)
 {
        gchar *cur_pos = src;
+       gchar *nextline;
 
        g_return_val_if_fail(str != NULL, cur_pos);
 
-       while (*cur_pos == ' ') cur_pos++;
+       /* read the next line if the current response buffer is empty */
+       while (isspace(*cur_pos)) cur_pos++;
+       while (*cur_pos == '\0') {
+               if ((nextline = sock_getline(sock)) == NULL)
+                       return cur_pos;
+               g_string_assign(str, nextline);
+               cur_pos = str->str;
+               strretchomp(nextline);
+               /* log_print("IMAP4< %s\n", nextline); */
+               debug_print("IMAP4< %s\n", nextline);
+               g_free(nextline);
+
+               while (isspace(*cur_pos)) cur_pos++;
+       }
 
        if (!strncmp(cur_pos, "NIL", 3)) {
                *dest = '\0';
@@ -1604,21 +1837,29 @@ static gchar *imap_parse_atom(SockInfo *sock, gchar *src,
        } else if (*cur_pos == '{') {
                gchar buf[32];
                gint len;
-               gchar *nextline;
+               gint line_len = 0;
 
                cur_pos = strchr_cpy(cur_pos + 1, '}', buf, sizeof(buf));
                len = atoi(buf);
 
-               if ((nextline = sock_getline(sock)) == NULL)
-                       return cur_pos;
-               strretchomp(nextline);
-               log_print("IMAP4< %s\n", nextline);
-               g_string_assign(str, nextline);
-
-               len = MIN(len, strlen(nextline));
-               memcpy(dest, nextline, MIN(len, dest_len - 1));
+               g_string_truncate(str, 0);
+               cur_pos = str->str;
+
+               do {
+                       if ((nextline = sock_getline(sock)) == NULL)
+                               return cur_pos;
+                       line_len += strlen(nextline);
+                       g_string_append(str, nextline);
+                       cur_pos = str->str;
+                       strretchomp(nextline);
+                       /* log_print("IMAP4< %s\n", nextline); */
+                       debug_print("IMAP4< %s\n", nextline);
+                       g_free(nextline);
+               } while (line_len < len);
+
+               memcpy(dest, cur_pos, MIN(len, dest_len - 1));
                dest[MIN(len, dest_len - 1)] = '\0';
-               cur_pos = str->str + len;
+               cur_pos += len;
        }
 
        return cur_pos;
@@ -1720,8 +1961,8 @@ static MsgFlags imap_parse_flags(const gchar *flag_str)
        while ((p = strchr(p, '\\')) != NULL) {
                p++;
 
-               if (g_strncasecmp(p, "Recent", 6) == 0) {
-                       MSG_SET_PERM_FLAGS(flags, MSG_NEW|MSG_UNREAD);
+               if (g_strncasecmp(p, "Recent", 6) == 0 && MSG_IS_UNREAD(flags)) {
+                       MSG_SET_PERM_FLAGS(flags, MSG_NEW);
                } else if (g_strncasecmp(p, "Seen", 4) == 0) {
                        MSG_UNSET_PERM_FLAGS(flags, MSG_NEW|MSG_UNREAD);
                } else if (g_strncasecmp(p, "Deleted", 7) == 0) {
@@ -1799,8 +2040,10 @@ static MsgInfo *imap_parse_envelope(SockInfo *sock, GString *line_str)
                        g_return_val_if_fail(*cur_pos == '(', NULL);
                        cur_pos = imap_parse_atom
                                (sock, cur_pos + 1, buf, sizeof(buf), line_str);
-                       Xstrdup_a(date, buf, return NULL);
-                       date_t = procheader_date_parse(NULL, date, 0);
+                       if (buf[0] != '\0') {
+                               Xstrdup_a(date, buf, return NULL);
+                               date_t = procheader_date_parse(NULL, date, 0);
+                       }
 
                        cur_pos = imap_parse_atom
                                (sock, cur_pos, buf, sizeof(buf), line_str);
@@ -1814,12 +2057,16 @@ static MsgInfo *imap_parse_envelope(SockInfo *sock, GString *line_str)
                                                     &tmp_from, &tmp_fromname,
                                                     line_str);
                        g_return_val_if_fail(cur_pos != NULL, NULL);
-                       Xstrdup_a(from, tmp_from,
-                                 {g_free(tmp_from); g_free(tmp_fromname);
-                                  return NULL;});
-                       Xstrdup_a(fromname, tmp_fromname,
-                                 {g_free(tmp_from); g_free(tmp_fromname);
-                                  return NULL;});
+                       if (tmp_from && *tmp_from != '\0')
+                               Xstrdup_a(from, tmp_from,
+                                         {g_free(tmp_from);
+                                          g_free(tmp_fromname);
+                                          return NULL;});
+                       if (tmp_fromname && *tmp_fromname != '\0')
+                               Xstrdup_a(fromname, tmp_fromname,
+                                         {g_free(tmp_from);
+                                          g_free(tmp_fromname);
+                                          return NULL;});
                        g_free(tmp_from);
                        g_free(tmp_fromname);
 
@@ -1995,12 +2242,27 @@ static gint imap_select(IMAPSession *session, IMAPFolder *folder,
 {
        gchar *real_path;
        gint ok;
+       gint exists_, recent_, unseen_, uid_validity_;
+
+       if (!exists || !recent || !unseen || !uid_validity) {
+               if (session->mbox && strcmp(session->mbox, path) == 0)
+                       return IMAP_SUCCESS;
+               exists = &exists_;
+               recent = &recent_;
+               unseen = &unseen_;
+               uid_validity = &uid_validity_;
+       }
+
+       g_free(session->mbox);
+       session->mbox = NULL;
 
        real_path = imap_get_real_path(folder, path);
        ok = imap_cmd_select(SESSION(session)->sock, real_path,
                             exists, recent, unseen, uid_validity);
        if (ok != IMAP_SUCCESS)
                log_warning(_("can't select folder: %s\n"), real_path);
+       else
+               session->mbox = g_strdup(path);
        g_free(real_path);
 
        return ok;
@@ -2040,8 +2302,9 @@ catch:
 
 static gint imap_status(IMAPSession *session, IMAPFolder *folder,
                        const gchar *path,
-                       gint *messages, gint *recent, gint *unseen,
-                       guint32 *uid_validity)
+                       gint *messages, gint *recent,
+                       guint32 *uid_next, guint32 *uid_validity,
+                       gint *unseen)
 {
        gchar *real_path;
        gchar *real_path_;
@@ -2049,14 +2312,15 @@ static gint imap_status(IMAPSession *session, IMAPFolder *folder,
        GPtrArray *argbuf;
        gchar *str;
 
-       *messages = *recent = *unseen = *uid_validity = 0;
+       *messages = *recent = *uid_next = *uid_validity = *unseen = 0;
 
        argbuf = g_ptr_array_new();
 
        real_path = imap_get_real_path(folder, path);
        QUOTE_IF_REQUIRED(real_path_, real_path);
        imap_cmd_gen_send(SESSION(session)->sock, "STATUS %s "
-                         "(MESSAGES RECENT UNSEEN UIDVALIDITY)", real_path_);
+                         "(MESSAGES RECENT UIDNEXT UIDVALIDITY UNSEEN)",
+                         real_path_);
 
        ok = imap_cmd_ok(SESSION(session)->sock, argbuf);
        if (ok != IMAP_SUCCESS) THROW(ok);
@@ -2076,12 +2340,15 @@ static gint imap_status(IMAPSession *session, IMAPFolder *folder,
                } else if (!strncmp(str, "RECENT ", 7)) {
                        str += 7;
                        *recent = strtol(str, &str, 10);
-               } else if (!strncmp(str, "UNSEEN ", 7)) {
-                       str += 7;
-                       *unseen = strtol(str, &str, 10);
+               } else if (!strncmp(str, "UIDNEXT ", 8)) {
+                       str += 8;
+                       *uid_next = strtoul(str, &str, 10);
                } else if (!strncmp(str, "UIDVALIDITY ", 12)) {
                        str += 12;
                        *uid_validity = strtoul(str, &str, 10);
+               } else if (!strncmp(str, "UNSEEN ", 7)) {
+                       str += 7;
+                       *unseen = strtol(str, &str, 10);
                } else {
                        g_warning("invalid STATUS response: %s\n", str);
                        break;
@@ -2281,6 +2548,18 @@ static gint imap_cmd_create(SockInfo *sock, const gchar *folder)
        return imap_cmd_ok(sock, NULL);
 }
 
+static gint imap_cmd_rename(SockInfo *sock, const gchar *old_folder,
+                           const gchar *new_folder)
+{
+       gchar *old_folder_, *new_folder_;
+
+       QUOTE_IF_REQUIRED(old_folder_, old_folder);
+       QUOTE_IF_REQUIRED(new_folder_, new_folder);
+       imap_cmd_gen_send(sock, "RENAME %s %s", old_folder_, new_folder_);
+
+       return imap_cmd_ok(sock, NULL);
+}
+
 static gint imap_cmd_delete(SockInfo *sock, const gchar *folder)
 {
        gchar *folder_;
@@ -2303,12 +2582,15 @@ static gint imap_cmd_fetch(SockInfo *sock, guint32 uid, const gchar *filename)
 
        imap_cmd_gen_send(sock, "UID FETCH %d BODY[]", uid);
 
-       if (sock_gets(sock, buf, sizeof(buf)) < 0)
-               return IMAP_ERROR;
-       strretchomp(buf);
-       if (buf[0] != '*' || buf[1] != ' ')
-               return IMAP_ERROR;
-       log_print("IMAP4< %s\n", buf);
+       while ((ok = imap_cmd_gen_recv(sock, buf, sizeof(buf)))
+              == IMAP_SUCCESS) {
+               if (buf[0] != '*' || buf[1] != ' ')
+                       return IMAP_ERROR;
+               if (strstr(buf, "FETCH") != NULL)
+                       break;
+       }
+       if (ok != IMAP_SUCCESS)
+               return ok;
 
        cur_pos = strchr(buf, '{');
        g_return_val_if_fail(cur_pos != NULL, IMAP_ERROR);
@@ -2344,7 +2626,7 @@ static gint imap_cmd_append(SockInfo *sock, const gchar *destfolder,
        g_return_val_if_fail(file != NULL, IMAP_ERROR);
 
        size = get_file_size_as_crlf(file);
-       if ((fp = fopen(file, "r")) == NULL) {
+       if ((fp = fopen(file, "rb")) == NULL) {
                FILE_OP_ERROR(file, "fopen");
                return -1;
        }
@@ -2440,7 +2722,6 @@ static gint imap_cmd_expunge(SockInfo *sock)
        return IMAP_SUCCESS;
 }
 
-
 static gint imap_cmd_ok(SockInfo *sock, GPtrArray *argbuf)
 {
        gint ok;
@@ -2598,6 +2879,215 @@ static gchar *search_array_str(GPtrArray *array, gchar *str)
 
 static void imap_path_separator_subst(gchar *str, gchar separator)
 {
-       if (separator && separator != '/')
-               subst_char(str, '/', separator);
+       gchar *p;
+       gboolean in_escape = FALSE;
+
+       if (!separator || separator == '/') return;
+
+       for (p = str; *p != '\0'; p++) {
+               if (*p == '/' && !in_escape)
+                       *p = separator;
+               else if (*p == '&' && *(p + 1) != '-' && !in_escape)
+                       in_escape = TRUE;
+               else if (*p == '-' && in_escape)
+                       in_escape = FALSE;
+       }
+}
+
+static gchar *imap_modified_utf7_to_locale(const gchar *mutf7_str)
+{
+#if !HAVE_LIBJCONV
+       return g_strdup(mutf7_str);
+#else
+       static iconv_t cd = (iconv_t)-1;
+       static gboolean iconv_ok = TRUE;
+       GString *norm_utf7;
+       gchar *norm_utf7_p;
+       size_t norm_utf7_len;
+       const gchar *p;
+       gchar *to_str, *to_p;
+       size_t to_len;
+       gboolean in_escape = FALSE;
+
+       if (!iconv_ok) return g_strdup(mutf7_str);
+
+       if (cd == (iconv_t)-1) {
+               cd = iconv_open(conv_get_current_charset_str(), "UTF-7");
+               if (cd == (iconv_t)-1) {
+                       g_warning(_("iconv cannot convert UTF-7 to %s\n"),
+                                 conv_get_current_charset_str());
+                       iconv_ok = FALSE;
+                       return g_strdup(mutf7_str);
+               }
+       }
+
+       norm_utf7 = g_string_new(NULL);
+
+       for (p = mutf7_str; *p != '\0'; p++) {
+               /* replace: '&'  -> '+',
+                           "&-" -> '&',
+                           escaped ','  -> '/' */
+               if (!in_escape && *p == '&') {
+                       if (*(p + 1) != '-') {
+                               g_string_append_c(norm_utf7, '+');
+                               in_escape = TRUE;
+                       } else {
+                               g_string_append_c(norm_utf7, '&');
+                               p++;
+                       }
+               } else if (in_escape && *p == ',') {
+                       g_string_append_c(norm_utf7, '/');
+               } else if (in_escape && *p == '-') {
+                       g_string_append_c(norm_utf7, '-');
+                       in_escape = FALSE;
+               } else {
+                       g_string_append_c(norm_utf7, *p);
+               }
+       }
+
+       norm_utf7_p = norm_utf7->str;
+       norm_utf7_len = norm_utf7->len;
+       to_len = strlen(mutf7_str) * 5;
+       to_p = to_str = g_malloc(to_len + 1);
+
+       if (iconv(cd, &norm_utf7_p, &norm_utf7_len, &to_p, &to_len) == -1) {
+               g_warning(_("iconv cannot convert UTF-7 to %s\n"),
+                         conv_get_current_charset_str());
+               g_string_free(norm_utf7, TRUE);
+               g_free(to_str);
+               return g_strdup(mutf7_str);
+       }
+
+       /* second iconv() call for flushing */
+       iconv(cd, NULL, NULL, &to_p, &to_len);
+       g_string_free(norm_utf7, TRUE);
+       *to_p = '\0';
+
+       return to_str;
+#endif /* !HAVE_LIBJCONV */
+}
+
+static gchar *imap_locale_to_modified_utf7(const gchar *from)
+{
+#if !HAVE_LIBJCONV
+       return g_strdup(from);
+#else
+       static iconv_t cd = (iconv_t)-1;
+       static gboolean iconv_ok = TRUE;
+       gchar *norm_utf7, *norm_utf7_p;
+       size_t from_len, norm_utf7_len;
+       GString *to_str;
+       gchar *from_tmp, *to, *p;
+       gboolean in_escape = FALSE;
+
+       if (!iconv_ok) return g_strdup(from);
+
+       if (cd == (iconv_t)-1) {
+               cd = iconv_open("UTF-7", conv_get_current_charset_str());
+               if (cd == (iconv_t)-1) {
+                       g_warning(_("iconv cannot convert %s to UTF-7\n"),
+                                 conv_get_current_charset_str());
+                       iconv_ok = FALSE;
+                       return g_strdup(from);
+               }
+       }
+
+       Xstrdup_a(from_tmp, from, return g_strdup(from));
+       from_len = strlen(from);
+       norm_utf7_len = from_len * 5;
+       Xalloca(norm_utf7, norm_utf7_len + 1, return g_strdup(from));
+       norm_utf7_p = norm_utf7;
+
+#define IS_PRINT(ch) (isprint(ch) && isascii(ch))
+
+       while (from_len > 0) {
+               if (IS_PRINT(*from_tmp)) {
+                       /* printable ascii char */
+                       *norm_utf7_p = *from_tmp;
+                       norm_utf7_p++;
+                       from_tmp++;
+                       from_len--;
+               } else {
+                       size_t mblen;
+
+                       /* unprintable char: convert to UTF-7 */
+                       for (mblen = 0;
+                            !IS_PRINT(from_tmp[mblen]) && mblen < from_len;
+                            mblen++)
+                               ;
+                       from_len -= mblen;
+                       if (iconv(cd, &from_tmp, &mblen,
+                                 &norm_utf7_p, &norm_utf7_len) == -1) {
+                               g_warning(_("iconv cannot convert %s to UTF-7\n"),
+                                         conv_get_current_charset_str());
+                               return g_strdup(from);
+                       }
+
+                       /* second iconv() call for flushing */
+                       iconv(cd, NULL, NULL, &norm_utf7_p, &norm_utf7_len);
+               }
+       }
+
+#undef IS_PRINT
+
+       *norm_utf7_p = '\0';
+       to_str = g_string_new(NULL);
+       for (p = norm_utf7; p < norm_utf7_p; p++) {
+               /* replace: '&' -> "&-",
+                           '+' -> '&',
+                           escaped '/' -> ',' */
+               if (!in_escape && *p == '&') {
+                       g_string_append(to_str, "&-");
+               } else if (!in_escape && *p == '+') {
+                       g_string_append_c(to_str, '&');
+                       in_escape = TRUE;
+               } else if (in_escape && *p == '/') {
+                       g_string_append_c(to_str, ',');
+               } else if (in_escape && *p == '-') {
+                       in_escape = FALSE;
+                       g_string_append_c(to_str, '-');
+               } else {
+                       g_string_append_c(to_str, *p);
+               }
+       }
+
+       if (in_escape) {
+               in_escape = FALSE;
+               g_string_append_c(to_str, '-');
+       }
+
+       to = to_str->str;
+       g_string_free(to_str, FALSE);
+
+       return to;
+#endif
+}
+
+static gboolean imap_rename_folder_func(GNode *node, gpointer data)
+{
+       FolderItem *item = node->data;
+       gchar **paths = data;
+       const gchar *oldpath = paths[0];
+       const gchar *newpath = paths[1];
+       gchar *base;
+       gchar *new_itempath;
+       gint oldpathlen;
+
+       oldpathlen = strlen(oldpath);
+       if (strncmp(oldpath, item->path, oldpathlen) != 0) {
+               g_warning("path doesn't match: %s, %s\n", oldpath, item->path);
+               return TRUE;
+       }
+
+       base = item->path + oldpathlen;
+       while (*base == G_DIR_SEPARATOR) base++;
+       if (*base == '\0')
+               new_itempath = g_strdup(newpath);
+       else
+               new_itempath = g_strconcat(newpath, G_DIR_SEPARATOR_S, base,
+                                          NULL);
+       g_free(item->path);
+       item->path = new_itempath;
+
+       return FALSE;
 }