drop_capabilities='cap_sys_admin,cap_sys_boot,cap_sys_module'
+debug = False
+
def getarch(f):
output = os.popen('readelf -h %s 2>&1'%f).readlines()
+ if debug: print "readelf output %s lines"%len(output)
classlines = [x for x in output if ('Class' in x.split(':')[0])]
line = classlines[0]
c = line.split(':')[1]
parser.add_argument("-r", "--root",
action="store_true", dest="root", default=False,
help="Enter as root: be careful")
- parser.add_argument ("slice",dest="slice_name",nargs=1)
+ parser.add_argument("-d","--debug",
+ action='store_true', dest='debug', default=False,
+ help="debug option")
+ parser.add_argument ("slice_name")
+ parser.add_argument ("command_to_run",nargs="*")
options = parser.parse_args()
slice_name=options.slice_name
+ global debug
+ debug=options.debug
try:
cmd = 'grep %s /proc/*/cgroup | grep freezer'%slice_name
output = os.popen(cmd).readlines()
+ if debug: print "output of grep freezer has %s lines"%len(output)
except:
print "Error finding slice %s"%slice_name
exit(1)
slice_spec = None
- # xxx fixme xxx - provide a default as this is not always properly computed
- arch = 'x86_64'
+ # provide a default as this is not always properly computed
+ arch = None
for e in output:
try:
path = l.split(':')[0]
comp = l.rsplit(':')[-1]
slice_name_check = comp.rsplit('/')[-1]
+ if debug: print "dealing with >%s<"%slice_name_check
if (slice_name_check == slice_name):
+ if debug: print "found %s"%slice_name
slice_path = path
pid = slice_path.split('/')[2]
cmdline = open('/proc/%s/cmdline'%pid).read().rstrip('\n\x00')
if (cmdline == '/sbin/init'):
slice_spec = slice_path
arch = getarch('/proc/%s/exe'%pid)
+ if debug: print "setting arch",arch
break
- except:
- break
+ except Exception,e:
+ if debug:
+ import traceback
+ print "BEG lxcsu - ignoring exception"
+ traceback.print_exc()
+ print "END lxcsu - ignoring exception"
+ pass
if (not slice_spec or not pid):
print "Not started: %s"%slice_name
exit(1)
+ if arch is None:
+ arch = 'x86_64'
+ if debug: print "WARNING: setting arch to default x86_64"
+
# Enter cgroups
try:
for subsystem in ['cpuset','memory','blkio']:
setns.chcontext('/proc/%s/ns/net'%pid)
if (not options.mntns):
- open('/proc/lxcsu','w').write(pid)
+ setns.chcontext('/proc/%s/ns/mnt'%pid)
if (not options.pidns):
- open('/proc/pidsu','w').write(pid)
+ setns.chcontext('/proc/%s/ns/pid'%pid)
+
+ if (not os.access('/proc/self',0)):
+ setns.proc_mount()
# cgroups is not yet LXC-safe, so we need to use the course grained access control
# strategy of unmounting the filesystem
cap_arg = '--drop='+drop_capabilities
if (not options.root):
- exec_args = [arch,'/usr/sbin/capsh',cap_arg,'--','--login']+args[1:]
+ exec_args = [arch,'/usr/sbin/capsh',cap_arg,'--','--login']+options.command_to_run
else:
- exec_args = [arch,'/usr/sbin/capsh','--','--login']+args[1:]
+ exec_args = [arch,'/usr/sbin/capsh','--','--login']+options.command_to_run
+ if debug:
+ print "exec'ing"
+ for arg in exec_args: print ">%s<"%arg
os.environ['SHELL'] = '/bin/sh'
os.execv('/usr/bin/setarch',exec_args)
else: