X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lxcsu;h=f794b888e775ed97c6d4d29e8389bbae8d1a54e2;hb=054dd4db1d9176f6959d32792e00d0d15c7b3edc;hp=05899d2e5cbf5bc6db13be320324830928aed2ba;hpb=76027c89cb39489ae4a26cb919277c28d791ce3f;p=lxc-userspace.git

diff --git a/lxcsu b/lxcsu
old mode 100755
new mode 100644
index 05899d2..f794b88
--- a/lxcsu
+++ b/lxcsu
@@ -3,11 +3,13 @@
 
 import setns
 import os
+import sys
 
-from optparse import OptionParser
+#from optparse import OptionParser
 
-drop_capabilities='cap_sys_admin,cap_net_admin,cap_sys_boot,cap_sys_module'
+drop_capabilities='cap_sys_admin,cap_net_admin,cap_sys_boot,cap_sys_module'.split(',')
 
+"""
 parser = OptionParser()
 parser.add_option("-n", "--net",
                   action="store_true", dest="netns", default=False,
@@ -20,6 +22,8 @@ parser.add_option("-p", "--pid",
                   help="Enter pid namespace")
 
 (options, args) = parser.parse_args()
+"""
+args = sys.argv[1:]
 
 try:
 	slice_name = args[0]
@@ -56,6 +60,29 @@ 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)
+
+# 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/utc'%pid)
 r2 = setns.chcontext('/proc/%s/ns/ipc'%pid)
 path = '/proc/%s/ns/net'%pid
@@ -63,4 +90,14 @@ r3 = setns.chcontext(path)
 
 open('/proc/lxcsu','w').write(pid)
 open('/proc/pidsu','w').write(pid)
-os.execv('/usr/sbin/capsh',['--drop',drop_capabilities,'--'])
+
+
+
+pid = os.fork()
+
+cap_args = map(lambda c:'--drop='+c, drop_capabilities)
+    
+if (pid == 0):
+    os.execv('/usr/sbin/capsh',cap_args+['--']+args[1:])
+else:
+    os.waitpid(pid,0)