def _ReadInstanceStatus(filename):
"""Reads an instance status file.
@type filename: string
@param filename: Path to status file
@rtype: tuple; (None or number, list of lists containing instance name and
status)
@return: File's mtime and instance status contained in the file; mtime is
C{None} if file can't be read
"""
logging.debug("Reading per-group instance status from '%s'", filename)
statcb = utils.FileStatHelper()
try:
content = utils.ReadFile(filename, preread=statcb)
except EnvironmentError as err:
if err.errno == errno.ENOENT:
logging.error("Can't read '%s', does not exist (yet)", filename)
else:
logging.exception("Unable to read '%s', ignoring", filename)
return (None, None)
else:
return (statcb.st.st_mtime,
[line.split(None, 1) for line in content.splitlines()])
def _PrepareFileUpload(getents_fn, node, filename):
"""Loads a file and prepares it for an upload to nodes.
"""
statcb = utils.FileStatHelper()
data = _Compress(node, utils.ReadFile(filename, preread=statcb))
st = statcb.st
if getents_fn is None:
getents_fn = runtime.GetEnts
getents = getents_fn()
virt_filename = vcluster.MakeVirtualPath(filename)
return [virt_filename, data, st.st_mode, getents.LookupUid(st.st_uid),
getents.LookupGid(st.st_gid), st.st_atime, st.st_mtime]
def ReadSsconfFile(filename):
"""Reads an ssconf file and verifies its size.
@type filename: string
@param filename: Path to file
@rtype: string
@return: File contents without newlines at the end
@raise RuntimeError: When the file size exceeds L{_MAX_SIZE}
"""
statcb = utils.FileStatHelper()
data = utils.ReadFile(filename, size=_MAX_SIZE, preread=statcb)
if statcb.st.st_size > _MAX_SIZE:
msg = ("File '%s' has a size of %s bytes (up to %s allowed)" %
(filename, statcb.st.st_size, _MAX_SIZE))
raise RuntimeError(msg)
return data.rstrip("\n")
