def open_process_namespaces(pid, namespace_fd, namespaces):
for ct_ns in namespaces:
try:
# arg 0 means readonly
namespace_fd[ct_ns] = libc.open('/proc/' + pid + '/ns/' + ct_ns, 0)
if namespace_fd[ct_ns] == -1:
errno_msg = misc.get_errno_msg(libc)
error_msg = 'Opening the %s namespace file failed: %s' \
% (ct_ns, errno_msg)
logger.warning(error_msg)
if ct_ns == 'mnt':
raise Exception(error_msg)
except Exception as e:
error_msg = 'The open() syscall failed with: %s' % e
logger.warning(error_msg)
if ct_ns == 'mnt':
raise e
def open_process_namespaces(pid, namespace_fd, namespaces):
for ct_ns in namespaces:
try:
# arg 0 means readonly
namespace_fd[ct_ns] = libc.open('/proc/' + pid + '/ns/' +
ct_ns, 0)
if namespace_fd[ct_ns] == -1:
errno_msg = misc.get_errno_msg(libc)
error_msg = 'Opening the %s namespace file failed: %s' \
% (ct_ns, errno_msg)
logger.warning(error_msg)
if ct_ns == 'mnt':
raise Exception(error_msg)
except Exception as e:
error_msg = 'The open() syscall failed with: %s' % e
logger.warning(error_msg)
if ct_ns == 'mnt':
raise e
def attach_to_process_namespaces(namespace_fd, ct_namespaces):
for ct_ns in ct_namespaces:
try:
if hasattr(libc, 'setns'):
r = libc.setns(namespace_fd[ct_ns], 0)
else:
# The Linux kernel ABI should be stable enough
__NR_setns = 308
r = libc.syscall(__NR_setns, namespace_fd[ct_ns], 0)
if r == -1:
errno_msg = misc.get_errno_msg(libc)
error_msg = ('Could not attach to the container %s '
'namespace (fd=%s): %s' %
(ct_ns, namespace_fd[ct_ns], errno_msg))
logger.warning(error_msg)
if ct_ns == 'mnt':
raise Exception(error_msg)
except Exception as e:
error_msg = 'The setns() syscall failed with: %s' % e
logger.warning(error_msg)
if ct_ns == 'mnt':
logger.exception(e)
raise e
def attach_to_process_namespaces(namespace_fd, ct_namespaces):
for ct_ns in ct_namespaces:
try:
if hasattr(libc, 'setns'):
r = libc.setns(namespace_fd[ct_ns], 0)
else:
# The Linux kernel ABI should be stable enough
__NR_setns = 308
r = libc.syscall(__NR_setns, namespace_fd[ct_ns], 0)
if r == -1:
errno_msg = misc.get_errno_msg(libc)
error_msg = ('Could not attach to the container %s '
'namespace (fd=%s): %s' %
(ct_ns, namespace_fd[ct_ns], errno_msg))
logger.warning(error_msg)
if ct_ns == 'mnt':
raise Exception(error_msg)
except Exception as e:
error_msg = 'The setns() syscall failed with: %s' % e
logger.warning(error_msg)
if ct_ns == 'mnt':
logger.exception(e)
raise e
