+/* This function manages the command for decompressing a comic book */
+static gboolean
+comics_decompress_temp_dir (const gchar *command_decompress_tmp,
+ const gchar *command,
+ GError **error)
+{
+ gboolean success;
+ gchar *std_out, *basename;
+ GError *err = NULL;
+ gint retval;
+
+ success = g_spawn_command_line_sync (command_decompress_tmp, &std_out,
+ NULL, &retval, &err);
+ basename = g_path_get_basename (command);
+ if (!success) {
+ g_set_error (error,
+ EV_DOCUMENT_ERROR,
+ EV_DOCUMENT_ERROR_INVALID,
+ _("Error launching the command “%s” in order to "
+ "decompress the comic book: %s"),
+ basename,
+ err->message);
+ g_error_free (err);
+ } else if (WIFEXITED (retval)) {
+ if (WEXITSTATUS (retval) == EXIT_SUCCESS) {
+ g_free (std_out);
+ g_free (basename);
+ return TRUE;
+ } else {
+ g_set_error (error,
+ EV_DOCUMENT_ERROR,
+ EV_DOCUMENT_ERROR_INVALID,
+ _("The command “%s” failed at "
+ "decompressing the comic book."),
+ basename);
+ g_free (std_out);
+ }
+ } else {
+ g_set_error (error,
+ EV_DOCUMENT_ERROR,
+ EV_DOCUMENT_ERROR_INVALID,
+ _("The command “%s” did not end normally."),
+ basename);
+ g_free (std_out);
+ }
+ g_free (basename);
+ return FALSE;
+}
+
+/* This function shows how to use the choosen command for decompressing a
+ * comic book file. It modifies fields of the ComicsDocument struct with
+ * this information */
+static gboolean
+comics_generate_command_lines (ComicsDocument *comics_document,
+ GError **error)
+{
+ gchar *quoted_file;
+ ComicBookDecompressType type;
+
+ type = comics_document->command_usage;
+ quoted_file = g_shell_quote (comics_document->archive);
+
+ comics_document->extract_command =
+ g_strdup_printf (command_usage_def[type].extract,
+ comics_document->selected_command);
+ comics_document->list_command =
+ g_strdup_printf (command_usage_def[type].list,
+ comics_document->selected_command,
+ quoted_file);
+ comics_document->regex_arg = command_usage_def[type].regex_arg;
+ comics_document->offset = command_usage_def[type].offset;
+ if (command_usage_def[type].decompress_tmp) {
+ comics_document->dir = ev_mkdtemp ("evince-comics-XXXXXX", error);
+ if (comics_document->dir == NULL)
+ return FALSE;
+
+ /* unrar-free can't create directories, but ev_mkdtemp already created the dir */
+
+ comics_document->decompress_tmp =
+ g_strdup_printf (command_usage_def[type].decompress_tmp,
+ comics_document->selected_command,
+ quoted_file,
+ comics_document->dir);
+ g_free (quoted_file);
+
+ if (!comics_decompress_temp_dir (comics_document->decompress_tmp,
+ comics_document->selected_command, error))
+ return FALSE;
+ else
+ return TRUE;
+ } else {
+ g_free (quoted_file);
+ return TRUE;
+ }
+
+}
+
+/* This function chooses an external command for decompressing a comic
+ * book based on its mime tipe. */
+static gboolean
+comics_check_decompress_command (gchar *mime_type,
+ ComicsDocument *comics_document,
+ GError **error)
+{
+ gboolean success;
+ gchar *std_out, *std_err;
+ gint retval;
+ GError *err = NULL;
+
+ /* FIXME, use proper cbr/cbz mime types once they're
+ * included in shared-mime-info */
+
+ if (!strcmp (mime_type, "application/x-cbr") ||
+ !strcmp (mime_type, "application/x-rar")) {
+ /* The RARLAB provides a no-charge proprietary (freeware)
+ * decompress-only client for Linux called unrar. Another
+ * option is a GPLv2-licensed command-line tool developed by
+ * the Gna! project. Confusingly enough, the free software RAR
+ * decoder is also named unrar. For this reason we need to add
+ * some lines for disambiguation. Sorry for the added the
+ * complexity but it's life :)
+ * Finally, some distributions, like Debian, rename this free
+ * option as unrar-free.
+ * */
+ comics_document->selected_command =
+ g_find_program_in_path ("unrar");
+ if (comics_document->selected_command) {
+ /* We only use std_err to avoid printing useless error
+ * messages on the terminal */
+ success =
+ g_spawn_command_line_sync (
+ comics_document->selected_command,
+ &std_out, &std_err,
+ &retval, &err);
+ if (!success) {
+ g_propagate_error (error, err);
+ g_error_free (err);
+ return FALSE;
+ /* I don't check retval status because RARLAB unrar
+ * doesn't have a way to return 0 without involving an
+ * operation with a file*/
+ } else if (WIFEXITED (retval)) {
+ if (g_strrstr (std_out,"freeware") != NULL)
+ /* The RARLAB freeware client */
+ comics_document->command_usage = RARLABS;
+ else
+ /* The Gna! free software client */
+ comics_document->command_usage = GNAUNRAR;
+
+ g_free (std_out);
+ g_free (std_err);
+ return TRUE;
+ }
+ }
+ /* The Gna! free software client with Debian naming convention */
+ comics_document->selected_command =
+ g_find_program_in_path ("unrar-free");
+ if (comics_document->selected_command) {
+ comics_document->command_usage = GNAUNRAR;
+ return TRUE;
+ }
+
+ } else if (!strcmp (mime_type, "application/x-cbz") ||
+ !strcmp (mime_type, "application/zip")) {
+ /* InfoZIP's unzip program */
+ comics_document->selected_command =
+ g_find_program_in_path ("unzip");
+ if (comics_document->selected_command) {
+ comics_document->command_usage = UNZIP;
+ return TRUE;
+ }
+
+ } else if (!strcmp (mime_type, "application/x-cb7") ||
+ !strcmp (mime_type, "application/x-7z-compressed")) {
+ /* 7zr, 7za and 7z are the commands from the p7zip project able
+ * to decompress .7z files */
+ comics_document->selected_command =
+ g_find_program_in_path ("7zr");
+ if (comics_document->selected_command) {
+ comics_document->command_usage = P7ZIP;
+ return TRUE;
+ }
+ comics_document->selected_command =
+ g_find_program_in_path ("7za");
+ if (comics_document->selected_command) {
+ comics_document->command_usage = P7ZIP;
+ return TRUE;
+ }
+ comics_document->selected_command =
+ g_find_program_in_path ("7z");
+ if (comics_document->selected_command) {
+ comics_document->command_usage = P7ZIP;
+ return TRUE;
+ }
+ } else {
+ g_set_error (error,
+ EV_DOCUMENT_ERROR,
+ EV_DOCUMENT_ERROR_INVALID,
+ _("Not a comic book MIME type: %s"),
+ mime_type);
+ return FALSE;
+ }
+ g_set_error_literal (error,
+ EV_DOCUMENT_ERROR,
+ EV_DOCUMENT_ERROR_INVALID,
+ _("Can't find an appropriate command to "
+ "decompress this type of comic book"));
+ return FALSE;
+}
+
+static int
+sort_page_names (gconstpointer a,
+ gconstpointer b)
+{
+ return strcmp (* (const char **) a, * (const char **) b);
+}
+