Viewing file:  diskutil.py (2.25 KB) -rw-r--r--
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#
# diskutil.py - handling of various disk related functions
#
# Copyright 2002 Red Hat, Inc.
#
# This software may be freely redistributed under the terms of the GNU
# library public license.
#
# You should have received a copy of the GNU Library Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
import os,sys
import _diskutil
def mount(device, location, fstype = "ext2", readOnly = 0):
location = os.path.normpath(location)
rc = _diskutil.mount(fstype, device, location, readOnly)
try:
if readOnly == 0:
ro = "ro"
else:
ro = "rw"
newline = "%s %s %s %s 0 0\n" %(device, location, fstype, ro)
f = open('/etc/mtab', 'a')
f.write(newline)
f.close()
except:
pass
return rc
def umount(what, removeDir = 0):
what = os.path.normpath(what)
if not os.path.isdir(what):
raise ValueError, "diskutil.umount() can only unmount by mount point"
rc = _diskutil.umount(what)
try:
f = open('/etc/mtab', 'r')
lines = f.readlines()
f.close()
f = open('/etc/mtab', 'w')
for line in lines:
(dev, mntpt, foo) = line.split(' ', 2)
if mntpt == what:
continue
f.write(line)
f.close()
except:
pass
# FIXME: probably racy
if removeDir and os.path.isdir(what):
os.rmdir(what)
return rc
def ejectCdrom(device = "/dev/cdrom"):
fd = os.open(device, os.O_RDONLY|os.O_NONBLOCK)
# best effort
try:
_diskutil.ejectcdrom(fd)
except SystemError:
pass
os.close(fd)
def losetup(device, file, readOnly = 0):
if readOnly:
mode = os.O_RDONLY
else:
mode = os.O_RDWR
targ = os.open(file, mode)
loop = os.open(device, mode)
try:
_diskutil.losetup(loop, targ, file)
finally:
os.close(loop)
os.close(targ)
def unlosetup(device):
loop = os.open(device, os.O_RDONLY)
try:
_diskutil.unlosetup(loop)
finally:
os.close(loop)
def getUnusedLoop():
dev = _diskutil.findunusedloopdev()
if dev is None:
raise SystemError, "Unable to find loop device"
return dev
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