def shutdown_other():
if send_message('shutdown:'):
print(_('Shutdown command sent, waiting for shutdown...'), flush=True)
for i in range(50):
with SingleInstance(singleinstance_name) as si:
if si:
return
time.sleep(0.1)
raise SystemExit(_('Failed to shutdown running calibre instance'))
def main(args=sys.argv):
# Ensure viewer can continue to function if GUI is closed
os.environ.pop('CALIBRE_WORKER_TEMP_DIR', None)
reset_base_dir()
scheme = QWebEngineUrlScheme(FAKE_PROTOCOL.encode('ascii'))
scheme.setSyntax(QWebEngineUrlScheme.Syntax.Host)
scheme.setFlags(QWebEngineUrlScheme.Flag.SecureScheme)
QWebEngineUrlScheme.registerScheme(scheme)
override = 'calibre-ebook-viewer' if islinux else None
processed_args = []
internal_book_data = internal_book_data_path = None
for arg in args:
if arg.startswith('--internal-book-data='):
internal_book_data_path = arg.split('=', 1)[1]
continue
processed_args.append(arg)
if internal_book_data_path:
try:
with lopen(internal_book_data_path, 'rb') as f:
internal_book_data = json.load(f)
finally:
try:
os.remove(internal_book_data_path)
except OSError:
pass
args = processed_args
app = Application(args, override_program_name=override, windows_app_uid=VIEWER_APP_UID)
parser = option_parser()
opts, args = parser.parse_args(args)
oat = opts.open_at
if oat and not (
oat.startswith('toc:') or oat.startswith('toc-href:') or oat.startswith('toc-href-contains:') or
oat.startswith('epubcfi(/') or is_float(oat) or oat.startswith('ref:')):
raise SystemExit('Not a valid --open-at value: {}'.format(opts.open_at))
if get_session_pref('singleinstance', False):
from calibre.utils.lock import SingleInstance
from calibre.gui2.listener import Listener
with SingleInstance(singleinstance_name) as si:
if si:
try:
listener = Listener(address=viewer_socket_address(), parent=app)
listener.start_listening()
except Exception as err:
error_dialog(None, _('Failed to start listener'), _(
'Could not start the listener used for single instance viewers. Try rebooting your computer.'),
det_msg=str(err), show=True)
else:
with closing(listener):
run_gui(app, opts, args, internal_book_data, listener=listener)
else:
send_message_to_viewer_instance(args, opts.open_at)
else:
run_gui(app, opts, args, internal_book_data)
def run_gui(opts, args, app, gui_debug=None):
with SingleInstance('db') as si:
if not si:
ext = '.exe' if iswindows else ''
error_dialog(None, _('Cannot start calibre'), _(
'Another calibre program that can modify calibre libraries, such as,'
' {0} or {1} is already running. You must first shut it down, before'
' starting the main calibre program. If you are sure no such'
' program is running, try restarting your computer.').format(
'calibre-server' + ext, 'calibredb' + ext), show=True)
return 1
run_gui_(opts, args, app, gui_debug)
def shutdown_other(rc=None):
if rc is None:
rc = build_pipe(print_error=False)
if rc.conn is None:
prints(_('No running calibre found'))
return # No running instance found
rc.conn.send(b'shutdown:')
prints(_('Shutdown command sent, waiting for shutdown...'))
for i in range(50):
with SingleInstance(singleinstance_name) as si:
if si:
return
time.sleep(0.1)
prints(_('Failed to shutdown running calibre instance'))
raise SystemExit(1)
def main(args=sys.argv):
if iswindows and 'CALIBRE_REPAIR_CORRUPTED_DB' in os.environ:
windows_repair()
return 0
gui_debug = None
if args[0] == '__CALIBRE_GUI_DEBUG__':
gui_debug = args[1]
args = ['calibre']
try:
app, opts, args = init_qt(args)
except AbortInit:
return 1
with SingleInstance(singleinstance_name) as si:
if si and opts.shutdown_running_calibre:
return 0
run_main(app, opts, args, gui_debug, si)
if after_quit_actions['restart_after_quit']:
restart_after_quit()
