use os.sync()

scripts/imager.py

@@ -63,7 +63,7 @@ def dd_linux():
 
     if dd_process.poll() is not None:
         log("\nExecuting ==> sync")
-        os.system("sync")
+        os.sync()
         log("ISO has been written to USB disk...")
         return
 

scripts/install.py

@@ -100,7 +100,7 @@ def install_distro():
 
     if platform.system() == 'Linux':
         log('ISO extracted successfully. Sync is in progress...')
-        os.system('sync')
+        os.sync()
 
     if config.persistence != 0:
         log('Creating persistence...')
@@ -159,7 +159,7 @@ def install_patch():
     """
     if config.distro == 'debian':
         if platform.system() == 'Linux':  # Need to syn under Linux. Otherwise, USB disk becomes random read only.
-            os.system('sync')
+            os.sync()
         iso_cfg_ext_dir = os.path.join(multibootusb_host_dir(), "iso_cfg_ext_dir")
         isolinux_path = os.path.join(iso_cfg_ext_dir, isolinux_bin_path(config.image_path))
         iso_linux_bin_dir = isolinux_bin_dir(config.image_path)

scripts/mbusb_gui.py

@@ -331,7 +331,7 @@ Are you SURE you want to enable it?",
         self.update_list_box(config.usb_disk)
         if sys.platform.startswith("linux"):
             self.ui.statusbar.showMessage("Status: Sync is in progress...")
-            os.system('sync')
+            os.sync()
         self.ui.statusbar.showMessage("Status: Idle")
         self.ui_disable_persistence()
         log(iso_name(config.image_path) + ' has been successfully installed.')
@@ -453,7 +453,7 @@ Are you SURE you want to enable it?",
         self.update_list_box(config.usb_mount)
         if sys.platform.startswith("linux"):
             self.ui.statusbar.showMessage("Status: Sync in progress...")
-            os.system('sync')
+            os.sync()
         self.ui.statusbar.showMessage("Status: Idle")
         QtWidgets.QMessageBox.information(self, 'Uninstall Complete...',
                                       config.uninstall_distro_dir_name + ' has been successfully removed.')

scripts/uninstall_distro.py

@@ -90,7 +90,7 @@ def delete_frm_file_list():
     if platform.system() == 'Linux':
         gen.log('Removed files from ' + config.uninstall_distro_dir_name)
         gen.log('Syncing....')
-        os.system('sync')
+        os.sync()
 
 
 
@@ -107,7 +107,7 @@ def uninstall_distro():
     usb_mount = usb_details['mount_point']
 
     if platform.system() == 'Linux':
-        os.system('sync')
+        os.sync()
         # remove 'immutable' from files on ext2/3/4 fs
         if usb_mount:
             subprocess.call("chattr -i -R %s/* 2>/dev/null" % usb_mount, shell=True)
@@ -133,7 +133,7 @@ def uninstall_distro():
 
     if os.path.exists(os.path.join(usb_mount, "multibootusb", config.uninstall_distro_dir_name)):
         if platform.system() == 'Linux':
-            os.system('sync')
+            os.sync()
         shutil.rmtree(os.path.join(usb_mount, "multibootusb", config.uninstall_distro_dir_name))
 
     delete_frm_file_list()
@@ -161,7 +161,7 @@ def update_sys_cfg_file():
     :return:
     """
     if platform.system() == 'Linux':
-        os.system('sync')
+        os.sync()
 
     sys_cfg_file = os.path.join(config.usb_mount, "multibootusb", "syslinux.cfg")
     if not os.path.exists(sys_cfg_file):
@@ -181,7 +181,7 @@ def update_grub_cfg_file():
     :return:
     """
     if platform.system() == 'Linux':
-        os.system('sync')
+        os.sync()
 
     grub_cfg_file = os.path.join(config.usb_mount, "multibootusb", "grub", "grub.cfg")
     if not os.path.exists(grub_cfg_file):
@@ -204,7 +204,7 @@ def uninstall_progress():
     usb_details = details(config.usb_disk)
     usb_mount = usb_details['mount_point']
     if platform.system() == 'Linux':
-        os.system('sync')
+        os.sync()
 
     if os.path.exists(os.path.join(usb_mount, "multibootusb", config.uninstall_distro_dir_name, "multibootusb.cfg")):
         with open(os.path.join(usb_mount, "multibootusb", config.uninstall_distro_dir_name, "multibootusb.cfg"),

scripts/update_cfg_file.py

@@ -270,7 +270,7 @@ def update_mbusb_cfg_file(iso_link, usb_uuid, usb_mount, distro):
     :return:
     """
     if platform.system() == 'Linux':
-        os.system('sync')
+        os.sync()
     log('Updating multibootusb config file...')
     sys_cfg_file = os.path.join(usb_mount, "multibootusb", "syslinux.cfg")
     install_dir = os.path.join(usb_mount, "multibootusb", iso_basename(iso_link))