def get_newest_mtime(path):
"""Scan items in 'path' and return newest modification time among entries found."""
newest = 0
for _, fpath, _ in FSHelpers.lsdir(path, must_exist=False):
mtime = os.path.getmtime(fpath)
if mtime > newest:
newest = mtime
if not newest:
raise Error(f"no files found in '{path}'")
return newest
def _get_cstate_indexes(self, cpu):
"""Yield tuples of of C-state indexes and sysfs paths for cpu number 'cpu'."""
basedir = self._sysfs_base / f"cpu{cpu}" / "cpuidle"
name = None
for name, path, typ in FSHelpers.lsdir(basedir, proc=self._proc):
errmsg = f"unexpected entry '{name}' in '{basedir}'{self._proc.hostmsg}"
if typ != "/" or not name.startswith("state"):
raise Error(errmsg)
index = name[len("state"):]
if not Trivial.is_int(index):
raise Error(errmsg)
yield int(index), Path(path)
if name is None:
raise Error(f"C-states are not supported{self._proc.hostmsg}")
def _get_ifinfos(proc):
"""
For every network interfaces backed by a real device on the system defined by 'proc', yield the
following tuples:
* interface name
* device HW address
"""
for ifname, path, typ in FSHelpers.lsdir(_SYSFSBASE, proc=proc):
if typ != "@":
# We expect a symlink.
continue
devpath = None
with contextlib.suppress(Error):
devpath = FSHelpers.abspath(path / "device", proc=proc)
if not devpath:
continue
yield ifname, devpath.name