# Volatility
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or (at
# your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details. 
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 

"""
@author:       Joe Sylve
@license:      GNU General Public License 2.0 or later
@contact:      joe.sylve@gmail.com
@organization: Digital Forensics Solutions
"""

import volatility.plugins.linux.common as linux_common
from volatility.plugins.linux.slab_info import linux_slabinfo
import volatility.plugins.linux.pslist as linux_pslist

class linux_pslist_cache(linux_pslist.linux_pslist):
    """Gather tasks from the kmem_cache"""

    def __init__(self, config, *args):
        linux_pslist.linux_pslist.__init__(self, config, *args)
        self._config.add_option('UNALLOCATED', short_option = 'u',
                        default = False,
                        help = 'Show unallocated',
                        action = 'store_true')

    def calculate(self):
        linux_common.set_plugin_members(self)
        pidlist = self._config.PID
        if pidlist:
            pidlist = [int(p) for p in self._config.PID.split(',')]

        cache = linux_slabinfo(self._config).get_kmem_cache("task_struct", self._config.UNALLOCATED)

        for task in cache:
            if not pidlist or task.pid in pidlist:
                yield task