Bump version to 0.2.2
[snf-image-creator] / image_creator / os_type / linux.py
index 4f08332..0166129 100644 (file)
 # interpreted as representing official policies, either expressed
 # or implied, of GRNET S.A.
 
-from image_creator.os_type.unix import Unix
+from image_creator.os_type.unix import Unix, sysprep
+
 import re
+import time
 
 
 class Linux(Unix):
-    def __init__(self, rootdev, ghandler):
-        super(Linux, self).__init__(rootdev, ghandler)
+    def __init__(self, rootdev, ghandler, output):
+        super(Linux, self).__init__(rootdev, ghandler, output)
         self._uuid = dict()
         self._persistent = re.compile('/dev/[hsv]d[a-z][1-9]*')
 
@@ -48,44 +50,119 @@ class Linux(Unix):
         if dev in self._uuid:
             return self._uuid[dev]
 
-        for attr in self.g.blkid(dev):
-            if attr[0] == 'UUID':
-                self._uuid[dev] = attr[1]
-                return attr[1]
-
-    def sysprep(self):
-        """Prepere system for image creation."""
-        self.sysprep_acpid()
-        self.sysprep_persistent_net_rules()
-        self.sysprep_persistent_devs()
+        uuid = self.g.vfs_uuid(dev)
+        assert len(uuid)
+        self._uuid[dev] = uuid
+        return uuid
 
-    def sysprep_acpid(self):
-        """Replace acpid powerdown action scripts to automatically shutdown
-        the system without checking if a GUI is running.
+    @sysprep()
+    def fix_acpid(self, print_header=True):
+        """Replace acpid powerdown action scripts to immediately shutdown the
+        system without checking if a GUI is running.
         """
-        action = '#!/bin/sh\n\nPATH=/sbin:/bin:/usr/bin\n shutdown -h now '
-        '\"Power button pressed\"'
 
-        if self.g.is_file('/etc/acpi/powerbtn.sh'):
-            self.g.write('/etc/acpi/powerbtn.sh', action)
-        elif self.g.is_file('/etc/acpi/actions/power.sh'):
-            self.g.write('/etc/acpi/actions/power.sh', action)
-        else:
-            print "Warning: No acpid action file found"
+        if print_header:
+            self.out.output('Fixing acpid powerdown action')
+
+        powerbtn_action = '#!/bin/sh\n\nPATH=/sbin:/bin:/usr/bin\n' \
+                          'shutdown -h now "Power button pressed"\n'
+
+        events_dir = '/etc/acpi/events'
+        if not self.g.is_dir(events_dir):
+            self.out.warn("No acpid event directory found")
+            return
 
-    def sysprep_persistent_net_rules(self):
+        event_exp = re.compile('event=(.+)', re.I)
+        action_exp = re.compile('action=(.+)', re.I)
+        for f in self.g.readdir(events_dir):
+            if f['ftyp'] != 'r':
+                continue
+
+            fullpath = "%s/%s" % (events_dir, f['name'])
+            event = ""
+            action = ""
+            for line in self.g.cat(fullpath).splitlines():
+                m = event_exp.match(line)
+                if m:
+                    event = m.group(1)
+                    continue
+                m = action_exp.match(line)
+                if m:
+                    action = m.group(1)
+                    continue
+
+            if event.strip() in ("button[ /]power", "button/power.*"):
+                if action:
+                    if not self.g.is_file(action):
+                        self.out.warn("Acpid action file: %s does not exist" %
+                                      action)
+                        return
+                    self.g.copy_file_to_file(action,
+                                             "%s.orig.snf-image-creator-%d" %
+                                             (action, time.time()))
+                    self.g.write(action, powerbtn_action)
+                    return
+                else:
+                    self.out.warn("Acpid event file %s does not contain and "
+                                  "action")
+                    return
+            elif event.strip() == ".*":
+                self.out.warn("Found action `.*'. Don't know how to handle "
+                              "this. Please edit `%s' image file manually to "
+                              "make the system immediatelly shutdown when an "
+                              "power button acpi event occures." %
+                              action.strip().split()[0])
+                return
+
+        self.out.warn("No acpi power button event found!")
+
+    @sysprep()
+    def remove_persistent_net_rules(self, print_header=True):
         """Remove udev rules that will keep network interface names persistent
         after hardware changes and reboots. Those rules will be created again
         the next time the image runs.
         """
+
+        if print_header:
+            self.out.output('Removing persistent network interface names')
+
         rule_file = '/etc/udev/rules.d/70-persistent-net.rules'
         if self.g.is_file(rule_file):
             self.g.rm(rule_file)
 
-    def sysprep_persistent_devs(self):
-        """Scan fstab and grub configuration files and replace all
-        non-persistent device appearences with UUIDs.
+    @sysprep()
+    def remove_swap_entry(self, print_header=True):
+        """Remove swap entry from /etc/fstab. If swap is the last partition
+        then the partition will be removed when shrinking is performed. If the
+        swap partition is not the last partition in the disk or if you are not
+        going to shrink the image you should probably disable this.
+        """
+
+        if print_header:
+            self.out.output('Removing swap entry from fstab')
+
+        new_fstab = ""
+        fstab = self.g.cat('/etc/fstab')
+        for line in fstab.splitlines():
+
+            entry = line.split('#')[0].strip().split()
+            if len(entry) == 6 and entry[2] == 'swap':
+                continue
+
+            new_fstab += "%s\n" % line
+
+        self.g.write('/etc/fstab', new_fstab)
+
+    @sysprep()
+    def use_persistent_block_device_names(self, print_header=True):
+        """Scan fstab & grub configuration files and replace all non-persistent
+        device references with UUIDs.
         """
+
+        if print_header:
+            self.out.output("Replacing fstab & grub non-persistent device "
+                            "references")
+
         # convert all devices in fstab to persistent
         persistent_root = self._persistent_fstab()
 
@@ -146,7 +223,7 @@ class Linux(Unix):
 
         entry = line.split()
         if len(entry) != 6:
-            print "Warning: detected abnorman entry in fstab"
+            self.out.warn("Detected abnormal entry in fstab")
             return orig, "", ""
 
         dev = entry[0]