Synnefo » snf-image-creator

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"""This module hosts OS-specific code common to all Unix-like OSs."""

import re

from image_creator.os_type import OSBase, sysprep

class Unix(OSBase):

    """OS class for Unix"""

    sensitive_userdata = [

        '.history',

        '.bash_history',

        '.gnupg',

        '.ssh',

        '.kamakirc',

        '.kamaki.history'

    ]

    def _mountpoints(self):

        """Return mountpoints in the correct order.

        / should be mounted before /boot or /usr, /usr befor /usr/bin ...

        """

        mps = self.g.inspect_get_mountpoints(self.root)

        def compare(a, b):

            if len(a[0]) > len(b[0]):

                return 1

            elif len(a[0]) == len(b[0]):

                return 0

            else:

                return -1

        mps.sort(compare)

        for mp in mps:

            yield mp

    def _do_mount(self, readonly):

        """Mount partitions in the correct order"""

        critical_mpoints = ('/', '/etc', '/root', '/home', '/var')

        mopts = 'ro' if readonly else 'rw'

        for mp, dev in self._mountpoints():

            try:

                self.g.mount_options(mopts, dev, mp)

            except RuntimeError as msg:

                if mp in critical_mpoints:

                    self.out.warn('unable to mount %s. Reason: %s' % (mp, msg))

                    return False

                else:

                    self.out.warn('%s (ignored)' % msg)

        return True

    @sysprep()

    def cleanup_cache(self, print_header=True):

        """Remove all regular files under /var/cache"""

        if print_header:

            self.out.output('Removing files under /var/cache')

        self._foreach_file('/var/cache', self.g.rm, ftype='r')

    @sysprep()

    def cleanup_tmp(self, print_header=True):

        """Remove all files under /tmp and /var/tmp"""

        if print_header:

            self.out.output('Removing files under /tmp and /var/tmp')

        self._foreach_file('/tmp', self.g.rm_rf, maxdepth=1)

        self._foreach_file('/var/tmp', self.g.rm_rf, maxdepth=1)

    @sysprep()

    def cleanup_log(self, print_header=True):

        """Empty all files under /var/log"""

        if print_header:

            self.out.output('Emptying all files under /var/log')

        self._foreach_file('/var/log', self.g.truncate, ftype='r')

    @sysprep(enabled=False)

    def cleanup_mail(self, print_header=True):

        """Remove all files under /var/mail and /var/spool/mail"""

        if print_header:

            self.out.output('Removing files under /var/mail & /var/spool/mail')

        if self.g.is_dir('/var/spool/mail'):

            self._foreach_file('/var/spool/mail', self.g.rm_rf, maxdepth=1)

        self._foreach_file('/var/mail', self.g.rm_rf, maxdepth=1)

    @sysprep()

    def cleanup_userdata(self, print_header=True):

        """Delete sensitive userdata"""

        homedirs = ['/root']

        if self.g.is_dir('/home/'):

            homedirs += self._ls('/home/')

        if print_header:

            self.out.output("Removing sensitive user data under %s" %

                            " ".join(homedirs))

        action = self.g.rm_rf

        if self._scrub_support:

            action = self.g.scrub_file

        else:

            self.out.warn("Sensitive data won't be scrubbed (not supported)")

        for homedir in homedirs:

            for data in self.sensitive_userdata:

                fname = "%s/%s" % (homedir, data)

                if self.g.is_file(fname):

                    action(fname)

                elif self.g.is_dir(fname):

                    self._foreach_file(fname, action, ftype='r')

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