import time
import traceback
+import mountimpl
import linuxcaps
import passfdimpl
+import utmp
import vserverimpl
from util_vserver_vars import *
class VServer:
- INITSCRIPTS = [('/etc/rc.vinit', 'start'), ('/etc/rc.d/rc', '3')]
+ INITSCRIPTS = [('/etc/rc.vinit', 'start'),
+ ('/etc/rc.d/rc', '%(runlevel)d')]
def __init__(self, name):
return os.fdopen(fd, mode, bufsize)
- def enter(self):
+ def __do_chcontext(self, state_file = None):
- state_file = open("/var/run/vservers/%s.ctx" % self.name, "w")
- self.__do_chroot()
vserverimpl.chcontext(self.ctx, self.remove_caps)
+ if not state_file:
+ return
print >>state_file, "S_CONTEXT=%d" % self.ctx
print >>state_file, "S_PROFILE=%s" % self.config.get("S_PROFILE", "")
state_file.close()
- def start(self):
+ def __prep(self, runlevel, log):
+
+ """ Perform all the crap that the vserver script does before
+ actually executing the startup scripts. """
+
+ # remove /var/run and /var/lock/subsys files
+ # but don't remove utmp from the top-level /var/run
+ RUNDIR = "/var/run"
+ LOCKDIR = "/var/lock/subsys"
+ filter_fn = lambda fs: filter(lambda f: f != 'utmp', fs)
+ garbage = reduce((lambda (out, ff), (dir, subdirs, files):
+ (out + map((dir + "/").__add__, ff(files)),
+ lambda fs: fs)),
+ list(os.walk(RUNDIR)),
+ ([], filter_fn))[0]
+ garbage += filter(os.path.isfile, map((LOCKDIR + "/").__add__,
+ os.listdir(LOCKDIR)))
+ for f in garbage:
+ os.unlink(f)
+
+ # set the initial runlevel
+ f = open(RUNDIR + "/utmp", "w")
+ utmp.set_runlevel(f, runlevel)
+ f.close()
+
+ # mount /proc and /dev/pts
+ self.__do_mount("none", "/proc", "proc")
+ # XXX - magic mount options
+ self.__do_mount("none", "/dev/pts", "devpts", 0, "gid=5,mode=0620")
+
+ def __do_mount(self, *mount_args):
+
+ try:
+ mountimpl.mount(*mount_args)
+ except OSError, ex:
+ if ex.errno == errno.EBUSY:
+ # assume already mounted
+ return
+ raise ex
+
+ def enter(self):
+
+ state_file = open("/var/run/vservers/%s.ctx" % self.name, "w")
+ self.__do_chroot()
+ self.__do_chcontext(state_file)
+
+ def start(self, wait, runlevel = 3):
child_pid = os.fork()
if child_pid == 0:
# get a new session
os.setsid()
+ # open state file to record vserver info
+ state_file = open("/var/run/vservers/%s.ctx" % self.name, "w")
+
# use /dev/null for stdin, /var/log/boot.log for stdout/err
os.close(0)
os.close(1)
os.open("/dev/null", os.O_RDONLY)
- log = self.open("/var/log/boot.log", "w", 0)
+ self.__do_chroot()
+ log = open("/var/log/boot.log", "w", 0)
os.dup2(1, 2)
- # write same output that vserver script does
print >>log, ("%s: starting the virtual server %s" %
(time.asctime(time.gmtime()), self.name))
+ # perform pre-init cleanup
+ self.__prep(runlevel, log)
+
# execute each init script in turn
# XXX - we don't support all scripts that vserver script does
cmd_pid = 0
for cmd in self.INITSCRIPTS + [None]:
- # don't bother waiting for last command to terminate
- if cmd == None:
- os._exit(0)
-
- # wait for previous command to terminate
- if cmd_pid:
+ # wait for previous command to terminate, unless it
+ # is the last one and the caller has specified to wait
+ if cmd_pid and (cmd != None or wait):
try:
os.waitpid(cmd_pid, 0)
except:
print >>log, "error waiting for %s:" % cmd_pid
traceback.print_exc()
+ # end of list
+ if cmd == None:
+ os._exit(0)
+
# fork and exec next command
cmd_pid = os.fork()
if cmd_pid == 0:
try:
# enter vserver context
- self.enter()
- print >>log, "executing '%s'" % " ".join(cmd)
- os.execl(cmd[0], *cmd)
- finally:
+ self.__do_chcontext(state_file)
+ arg_subst = { 'runlevel': runlevel }
+ cmd_args = [cmd[0]] + map(lambda x: x % arg_subst,
+ cmd[1:])
+ print >>log, "executing '%s'" % " ".join(cmd_args)
+ os.execl(cmd[0], *cmd_args)
+ except:
traceback.print_exc()
os._exit(1)
+ else:
+ # don't want to write state_file multiple times
+ state_file = None
# we get here due to an exception in the top-level child process
except Exception, ex:
git://git.onelab.eu / util-vserver.git / blobdiff