qubes-installer-qubes-os/anaconda/pyanaconda/isys/__init__.py

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#
# isys.py - installer utility functions and glue for C module
#
# Copyright (C) 2001-2013 Red Hat, Inc.
# All rights reserved.
#
# 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, see <http://www.gnu.org/licenses/>.
#
# Author(s): Matt Wilson <msw@redhat.com>
# Erik Troan <ewt@redhat.com>
# Jeremy Katz <katzj@redhat.com>
#
try:
from pyanaconda import _isys
except ImportError:
# We're running in some sort of testing mode, in which case we can fix
# up PYTHONPATH and just do this basic import.
import _isys
import os
import os.path
import socket
import stat
import sys
from pyanaconda import iutil
import blivet.arch
import re
import struct
import dbus
import time
import datetime
import logging
log = logging.getLogger("anaconda")
if blivet.arch.getArch() in ["ppc64", "ppc64le"]:
MIN_RAM = 768
GUI_INSTALL_EXTRA_RAM = 512
else:
MIN_RAM = 320
GUI_INSTALL_EXTRA_RAM = 90
MIN_GUI_RAM = MIN_RAM + GUI_INSTALL_EXTRA_RAM
SQUASHFS_EXTRA_RAM = 750
NO_SWAP_EXTRA_RAM = 200
## Flush filesystem buffers.
def sync ():
# TODO: This can be replaced with os.sync in Python 3.3
return _isys.sync ()
ISO_BLOCK_SIZE = 2048
## Determine if a file is an ISO image or not.
# @param file The full path to a file to check.
# @return True if ISO image, False otherwise.
def isIsoImage(path):
try:
with open(path, "rb") as isoFile:
for blockNum in range(16, 100):
isoFile.seek(blockNum * ISO_BLOCK_SIZE + 1)
if isoFile.read(5) == "CD001":
return True
except IOError:
pass
return False
isPAE = None
def isPaeAvailable():
global isPAE
if isPAE is not None:
return isPAE
isPAE = False
if not blivet.arch.isX86():
return isPAE
f = open("/proc/cpuinfo", "r")
lines = f.readlines()
f.close()
for line in lines:
if line.startswith("flags") and line.find("pae") != -1:
isPAE = True
break
return isPAE
def isLpaeAvailable():
with open("/proc/cpuinfo", "r") as fobj:
for line in fobj:
if line.startswith("Features") and "lpae" in line.split():
return True
return False
def set_system_time(secs):
"""
Set system time to time given as a number of seconds since the Epoch.
:param secs: a number of seconds since the Epoch to set system time to
:type secs: int
"""
_isys.set_system_time(secs)
log.info("System time set to %s", time.ctime(secs))
def set_system_date_time(year=None, month=None, day=None, hour=None, minute=None,
second=None, utc=False):
"""
Set system date and time given by the parameters as numbers. If some
parameter is missing or None, the current system date/time field is used
instead (i.e. the value is not changed by this function).
:type year, month, ..., second: int
:param utc: wheter the other parameters specify UTC or local time
:type utc: bool
"""
# get the right values
local = 0 if utc else 1
now = datetime.datetime.now()
year = year or now.year
month = month or now.month
day = day or now.day
hour = hour or now.hour
minute = minute or now.minute
second = second or now.second
# struct fields -> year, month, day, hour, minute, second, week_day, year_day, local
time_struct = time.struct_time((year, month, day, hour, minute, second, 0, 0, local))
set_system_time(int(time.mktime(time_struct)))
def total_memory():
"""Returns total system memory in kB (given to us by /proc/meminfo)"""
with open("/proc/meminfo", "r") as fobj:
for line in fobj:
if not line.startswith("MemTotal"):
# we are only interested in the MemTotal: line
continue
fields = line.split()
if len(fields) != 3:
log.error("unknown format for MemTotal line in /proc/meminfo: %s", line.rstrip())
raise RuntimeError("unknown format for MemTotal line in /proc/meminfo: %s" % line.rstrip())
try:
memsize = int(fields[1])
except ValueError:
log.error("ivalid value of MemTotal /proc/meminfo: %s", fields[1])
raise RuntimeError("ivalid value of MemTotal /proc/meminfo: %s" % fields[1])
# Because /proc/meminfo only gives us the MemTotal (total physical
# RAM minus the kernel binary code), we need to round this
# up. Assuming every machine has the total RAM MB number divisible
# by 128.
memsize /= 1024
memsize = (memsize / 128 + 1) * 128
memsize *= 1024
log.info("%d kB (%d MB) are available", memsize, memsize / 1024)
return memsize
log.error("MemTotal: line not found in /proc/meminfo")
raise RuntimeError("MemTotal: line not found in /proc/meminfo")
handleSegv = _isys.handleSegv