def do_renameat(self, debugger: Debugger) -> bool:
old_path, old_path_error = self.read_path('renameat', debugger,
debugger.uarg1)
if old_path_error is not None:
return old_path_error
new_path, new_path_error = self.read_path('renameat', debugger,
debugger.uarg3)
if new_path_error is not None:
return new_path_error
if not self._file_access_check(old_path,
debugger,
is_write=True,
is_open=False,
dirfd=debugger.uarg0):
return ACCESS_EPERM(debugger)
if not self._file_access_check(new_path,
debugger,
is_write=True,
is_open=False,
dirfd=debugger.uarg2):
return ACCESS_EPERM(debugger)
return True
def do_utimensat(self, debugger: AdvancedDebugger) -> bool:
timespec = struct.Struct({32: '=ii', 64: '=QQ'}[debugger.address_bits])
# Emulate https://github.com/torvalds/linux/blob/v5.14/fs/utimes.c#L152-L161
times_ptr = debugger.uarg2
if times_ptr:
try:
buffer = debugger.readbytes(times_ptr, timespec.size * 2)
except OSError:
return ACCESS_EFAULT(debugger)
times = list(timespec.iter_unpack(buffer))
if times[0][1] == UTIME_OMIT and times[1][1] == UTIME_OMIT:
debugger.syscall = -1
def on_return():
debugger.result = 0
debugger.on_return(on_return)
return True
# Emulate https://github.com/torvalds/linux/blob/v5.14/fs/utimes.c#L142-L143
if debugger.uarg0 != AT_FDCWD and not debugger.uarg1:
path = self._getfd_pid(debugger.tid, debugger.uarg0)
return True if self.write_fs_jail.check(path) else ACCESS_EPERM(
debugger)
return self.check_file_access_at('utimensat')(debugger)
def do_prlimit(self, debugger):
return True if debugger.uarg0 in (
0, debugger.pid) else ACCESS_EPERM(debugger)
def do_kill(self, debugger):
# Allow tgkill to execute as long as the target thread group is the debugged process
# libstdc++ seems to use this to signal itself, see <https://github.com/DMOJ/judge/issues/183>
return True if debugger.uarg0 == debugger.pid else ACCESS_EPERM(
debugger)
def do_fchmod(self, debugger: Debugger) -> bool:
path = self._getfd_pid(debugger.tid, debugger.uarg0)
return True if self.write_fs_jail.check(path) else ACCESS_EPERM(
debugger)