Better manage error messages in writing persistent partition

1 files changed, 61 insertions, 17 deletions

diff --git a/backend/raw_write.py b/backend/raw_write.py
index 9f06295..48dbb9c 100755
--- a/backend/raw_write.py
+++ b/backend/raw_write.py
@@ -234,14 +234,28 @@ class Dumper(object):
 
     def _do_persistence(self, target, label, key):
         logging.debug("Start doing persistence partition")
-        p = Popen(["fdisk",target], stdin = PIPE)
-        p.communicate(input=b'n\np\n3\n\n\nw\n')
-        # example mkfs.ext4 -L mgalive-persist /dev/sdf3
+        p = Popen(["fdisk",target], stdin = PIPE, stderr=PIPE)
+        outs, errs = p.communicate(input=b'n\np\n3\n\n\nw\n')
+        working=True
+        while working:
+            time.sleep(0.5)
+            p.poll()
+            rc=p.returncode
+            if rc is None:
+                working=True
+            else:
+                process = None
+                working= False
+        if rc != 0:
+            self.return_state = False
+            self.return_message = _("Error while doing persistent partition: ") + errs.decode('utf-8')
+            return
+        logging.debug("New partition created")
 
         if key == "":
-            print("No key provided", file=sys.stderr)
-            process = Popen(['mkfs.ext4','-L', label,  target+"3"])
-            p.communicate()
+            # example mkfs.ext4 -L mgalive-persist /dev/sdf3
+            process = Popen(['mkfs.ext4','-L', label,  target+"3"],sterr=PIPE)
+            outs, errs = p.communicate()
             working=True
             while working:
                 time.sleep(0.5)
@@ -252,13 +266,21 @@ class Dumper(object):
                 else:
                     process = None
                     working= False
-            logging.debug("Persistence partition done")
+            if rc == 0:
+                self.return_state = True
+                self.return_message = _("Persistent partition done")
+            else:
+                self.return_state = False
+                self.return_message = _("Error while doing persistent partition: ") + errs
+                return
+            logging.info("Persistent partition done")
+
         else:
-            # cryptsetup luksFormat /dev/sdb3
+            # example cryptsetup luksFormat /dev/sdb3
             print("Crypt key provided",file=sys.stderr)
             base_target = os.path.basename(target) + "3"
-            process = Popen(['cryptsetup','luksFormat','-q',  target+"3", '-d', '-'],stdin=PIPE)
-            process.communicate(input=key.encode('utf-8'))
+            process = Popen(['cryptsetup','luksFormat','-q',  target+"3", '-d', '-'],stdin=PIPE, stderr=PIPE)
+            outs, errs = process.communicate(input=key.encode('utf-8'))
             working=True
             while working:
                 time.sleep(0.5)
@@ -269,10 +291,15 @@ class Dumper(object):
                 else:
                     process = None
                     working= False
+            if rc != 0:
+                self.return_state = False
+                self.return_message = _("Error while doing persistent partition: ") + errs
+                logging.error(self.return_message)
+                return
             # cryptsetup open /dev/sdb3 crypt_sdb3
 
-            process = Popen(['cryptsetup','luksOpen',  target + "3", 'crypt_' + base_target ,'-d','-'],stdin=PIPE)
-            process.communicate(input=key.encode('utf-8'))
+            process = Popen(['cryptsetup','luksOpen',  target + "3", 'crypt_' + base_target ,'-d','-'],stdin=PIPE, stderr=PIPE)
+            outs, errs = process.communicate(input=key.encode('utf-8'))
             working=True
             while working:
                 time.sleep(0.5)
@@ -283,9 +310,15 @@ class Dumper(object):
                 else:
                     process = None
                     working= False
+            if rc != 0:
+                self.return_state = False
+                self.return_message = _("Error while doing persistent partition: ") + errs
+                logging.error(self.return_message)
+                return
+
             # mkfs.ext4 -L mgalive-persist /dev/mapper/crypt_sdb3
-            process = Popen(['mkfs.ext4','-L', label,  '/dev/mapper/crypt_' + base_target])
-            process.communicate()
+            process = Popen(['mkfs.ext4','-L', label,  '/dev/mapper/crypt_' + base_target],stderr=PIPE)
+            outs, errs = process.communicate()
             working=True
             while working:
                 time.sleep(0.5)
@@ -296,10 +329,15 @@ class Dumper(object):
                 else:
                     process = None
                     working= False
+            if rc != 0:
+                self.return_state = False
+                self.return_message = _("Error while doing persistent partition: ") + errs
+                logging.error(self.return_message)
+                return
             # cryptsetup close crypt_sdb3
 
             process = Popen(['cryptsetup','luksClose', 'crypt_' + base_target ])
-            process.communicate()
+            outs, errs = process.communicate()
             working=True
             while working:
                 time.sleep(0.5)
@@ -310,8 +348,14 @@ class Dumper(object):
                 else:
                     process = None
                     working= False
-        return rc
-
+            if rc != 0:
+                self.return_state = False
+                self.return_message = _("Error while doing persistent partition: ") + errs
+                logging.error(self.return_message)
+            else:
+                self.return_state = True
+                self.return_message = _("Persistent partition done")
+                logging.info("Persistent partition done")
 
 
     def __init__(self):