Add Algol 68 executor

README.md

@@ -56,6 +56,7 @@ Supported languages include:
 The judge can also grade in the languages listed below:
 
 * Ada
+* Algol 68
 * AWK
 * Brain\*\*\*\*
 * COBOL

dmoj/executors/ALGL68.py

@@ -0,0 +1,42 @@
+from typing import List
+
+from dmoj.cptbox.handlers import ACCESS_EACCES
+from dmoj.executors.compiled_executor import CompiledExecutor
+
+
+class Executor(CompiledExecutor):
+    ext = 'a'
+    command = 'a68g'
+
+    test_program = """
+BEGIN
+    STRING input;
+    get(standin, input);
+    print((input, newline))
+END
+"""
+
+    data_grace = 131072
+    syscalls = [
+        ('mkdir', ACCESS_EACCES),
+        ('mkdirat', ACCESS_EACCES),
+        'alarm',
+        'setitimer',
+    ]
+
+    def get_compile_args(self) -> List[str]:
+        command = self.get_command()
+        assert command is not None
+        assert self._code is not None
+        # This doesn't actually compile anything, but will generate useful
+        # output if the program is malformed.
+        return [command, '--norun', '--noportcheck', '--nopragmats', self._code]
+
+    def get_cmdline(self, **kwargs) -> List[str]:
+        command = self.get_command()
+        assert command is not None
+        assert self._code is not None
+        return [command, '--nowarnings', '--noportcheck', '--nopragmats', self._code]
+
+    def get_executable(self):
+        return self.get_command()

dmoj/executors/compiled_executor.py

@@ -1,6 +1,9 @@
+import fcntl
 import hashlib
 import os
 import pty
+import struct
+import termios
 from typing import Any, Dict, IO, List, Optional, Tuple, Union
 
 import pylru
@@ -126,6 +129,11 @@ def create_compile_process(self, args: List[str]) -> TracedPopen:
         #
         # Emulate the streams of a process connected to a terminal: stdin, stdout, and stderr are all ptys.
         _master, _slave = pty.openpty()
+
+        # Some runtimes helpfully try to word-wrap error messages by determining the width of the screen. Lie and say
+        # we're a 1024x1024 terminal, so they don't try wrapping to 1-column width.
+        fcntl.ioctl(_slave, termios.TIOCSWINSZ, struct.pack('HHHH', 1024, 1024, 0, 0))
+
         # Some runtimes *cough cough* Swift *cough cough* actually check the environment variables too.
         env = self.get_compile_env() or os.environ.copy()
         env['TERM'] = 'xterm'