#!/usr/bin/python
-
-import setns
import os
import sys
-#from optparse import OptionParser
-
-drop_capabilities='cap_sys_admin,cap_sys_boot,cap_sys_module'
-
-def umount(fs_dir):
- output = os.popen('/bin/umount %s 2>&1'%fs_dir).read()
- return ('device is busy' not in fs_dir)
-
-
-"""
-parser = OptionParser()
-parser.add_option("-n", "--net",
- action="store_true", dest="netns", default=False,
- help="Enter network namespace")
-parser.add_option("-m", "--mnt",
- action="store_true", dest="mntns", default=False,
- help="Enter mount namespace")
-parser.add_option("-p", "--pid",
- action="store_true", dest="pidns", default=False,
- help="Enter pid namespace")
-
-(options, args) = parser.parse_args()
-"""
-args = sys.argv[1:]
-
-try:
- slice_name = args[0]
-except IndexError:
- print "You must specify a vm name"
- exit(1)
-
-try:
- cmd = 'grep %s /proc/*/cgroup | grep freezer'%slice_name
- output = os.popen(cmd).readlines()
-except:
- print "Error finding slice %s"%slice_name
- exit(1)
-
-slice_spec = None
-for e in output:
- try:
- l = e.rstrip()
- path = l.split(':')[0]
- comp = l.rsplit(':')[-1]
- slice_name_check = comp.rsplit('/')[-1]
-
- if (slice_name_check == 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
- break
- except:
- break
-
-if (not slice_spec or not pid):
- print "Not started: %s"%slice_name
- exit(1)
-
-# Enter cgroups
-try:
- for subsystem in ['cpuset','memory','blkio']:
- open('/sys/fs/cgroup/%s/libvirt/lxc/%s/tasks'%(subsystem,slice_name),'w').write(str(os.getpid()))
-
-except:
- print "Error assigning resources: %s"%slice_name
- exit(1)
-
-try:
- open('/sys/fs/cgroup/cpuacct/system/libvirtd.service/libvirt/lxc/%s/tasks'%slice_name,'w').write(str(os.getpid()))
-except:
- print "Error assigning cpuacct: %s" % slice_name
- exit(1)
-
-# If the slice is frozen, then we'll get an EBUSY when trying to write to the task
-# list for the freezer cgroup. Since the user couldn't do anything anyway, it's best
-# in this case to error out the shell. (an alternative would be to un-freeze it,
-# add the task, and re-freeze it)
-try:
- f=open('/sys/fs/cgroup/freezer/libvirt/lxc/%s/tasks'%(slice_name),'w')
- f.write(str(os.getpid()))
- # note: we need to call f.close() explicitly, or we'll get an exception in
- # the object destructor, which will not be caught
- f.close()
-except:
- print "Error adding task to freezer cgroup. Slice is probably frozen: %s" % slice_name
- exit(1)
-
-r1 = setns.chcontext('/proc/%s/ns/uts'%pid)
-r2 = setns.chcontext('/proc/%s/ns/ipc'%pid)
-r3 = setns.chcontext('/proc/%s/ns/net'%pid)
-
-open('/proc/lxcsu','w').write(pid)
-open('/proc/pidsu','w').write(pid)
+from argparse import ArgumentParser
-# cgroups is not yet LXC-safe, so we need to use the course grained access control
-# strategy of unmounting the filesystem
+LXCSU_INTERNAL='/usr/sbin/lxcsu-internal'
-umount_result = True
-for subsystem in ['cpuset','cpu,cpuacct','memory','devices','freezer','net_cls','blkio','perf_event']:
- fs_path = '/sys/fs/cgroup/%s'%subsystem
- if (not umount(fs_path)):
- print "Error disabling cgroup access"
- exit(1)
+def main ():
+ parser = ArgumentParser()
+ parser.add_argument ("slice_name")
+ parser.add_argument ("command_to_run",nargs="*")
-if (not umount('/sys/fs/cgroup')):
- print "Error disabling cgroup access"
- exit(1)
+ options = parser.parse_args()
+ slice_name=options.slice_name
+ commands = options.command_to_run
+ if (not commands):
+ commands = ['/bin/sh']
-pid = os.fork()
-if (pid == 0):
- cap_arg = '--drop='+drop_capabilities
- exec_args = ['/usr/sbin/capsh',cap_arg,'--','--login']+args[1:]
+ exec_args = [LXCSU_INTERNAL,slice_name,'--','-c']
+ exec_args+=commands
+ os.execv(LXCSU_INTERNAL,exec_args)
- os.environ['SHELL'] = '/bin/sh'
- os.execv('/usr/sbin/capsh',exec_args)
-else:
- (r_pid,combined)=os.waitpid(pid,0)
- retcod=combined/256
- sys.exit(retcod)
-
+if __name__ == '__main__':
+ main()
git://git.onelab.eu / lxc-userspace.git / blobdiff