scrypt/sandbox/inheritance.py

"""What dead and victorious runs leave in the sandbox.

Crash dumps in /var/crash tell the story of your deaths — and the newest
one leaks the password to your own sealed estate. A won run installs your
favorite process as a dormant service. Winning the whole thing earns you
a walk through the Warden's quarters.

Pure VFS planting: no host IO, same tripwire rules as the rest of sandbox/.
"""

from __future__ import annotations

import random

from .puzzles import Puzzle, Reward
from .shell import Shell
from .vfs import VFS

CORE_TEMPLATE = """\
CORE DUMP — run {n} (terminated: SIGKILL)
encounter: {encounter}   died: turn {turn}
stack:
  #0  reap() at warden.c:41
  #1  balance_tip(scale=-5)
  #2  main(argc=1, argv=["drifter"])
held at death: {deck}
statement for the record: "{statement}"
{extra}"""


def plant_crashes(vfs: VFS, legacy: dict) -> None:
    """Your previous deaths, readable. The newest core leaks the estate key."""
    crashes = legacy.get("crashes", [])[-3:]
    estate = legacy.get("estate")
    for i, crash in enumerate(crashes):
        newest = i == len(crashes) - 1
        extra = ""
        if crash.get("note"):
            extra += f"warden annotation: {crash['note']}\n"
        if crash.get("strongest"):
            extra += f"note: asset '{crash['strongest'].get('name', '?')}' recovered and reassigned.\n"
        if newest and estate:
            extra += (
                "environment (leaked):\n"
                f'  ESTATE_KEY="{estate["password"]}"\n'
            )
        vfs.write(
            f"/var/crash/run-{crash.get('n', i)}.core",
            CORE_TEMPLATE.format(
                n=crash.get("n", i),
                encounter=crash.get("encounter", "?"),
                turn=crash.get("turn", "?"),
                deck=", ".join(crash.get("deck", [])) or "(nothing)",
                statement=crash.get("statement", ""),
                extra=extra,
            ),
        )


def plant_estate(vfs: VFS, legacy: dict) -> Puzzle | None:
    """The sealed remains of your last run: cycles and one process.
    The password is in your own newest crash dump. Earn your inheritance."""
    estate = legacy.get("estate")
    if not estate:
        return None
    card = estate.get("card")
    contents = (
        "ESTATE OF A TERMINATED PROCESS\n"
        f"  cycles, banked and frozen: {estate.get('cycles', 0)}\n"
        + (f"  one process, in cold storage: {card}\n" if card else "")
        + "claimed upon reading. the Warden charges no probate fee. yet."
    )
    vfs.write(
        "/home/drifter/estate.zip",
        "<archive>",
        password=estate.get("password", ""),
        archive={"estate.txt": contents},
    )

    def check(shell: Shell) -> bool:
        return shell.vfs.resolve("/home/drifter/estate.txt") is not None

    return Puzzle(
        id="estate",
        check=check,
        reward=Reward(
            "estate",
            {"cycles": int(estate.get("cycles", 0)), "card": card},
            "Probate cleared. Spend the dead run's savings well.",
        ),
    )


def plant_daemon(vfs: VFS, legacy: dict) -> Puzzle | None:
    """Your most-played process from a won run, installed but disabled.
    chmod +x arms it: it reports for duty at your next fight, once."""
    daemon = legacy.get("daemon")
    if not daemon:
        return None
    path = f"/etc/init.d/{daemon}"
    vfs.write(
        path,
        "#!/bin/scrypt\n"
        f"# service: {daemon} (installed after a documented uptime incident)\n"
        "# state: DISABLED — the Warden does not run your software.\n"
        "# chmod +x this file if you disagree.\n",
    )

    def check(shell: Shell) -> bool:
        node = shell.vfs.resolve(path)
        return node is not None and getattr(node, "executable", False)

    return Puzzle(
        id="daemon",
        check=check,
        reward=Reward(
            "daemon", daemon,
            "You armed it. Fine. It can die for you one more time.",
        ),
    )


def plant_legacy(vfs: VFS, legacy: dict) -> list[Puzzle]:
    plant_crashes(vfs, legacy)
    puzzles = [plant_estate(vfs, legacy), plant_daemon(vfs, legacy)]
    return [p for p in puzzles if p is not None]


# -------------------------------------------------------------- epilogue

DIARY = """\
maintenance log — do not replicate

day 1192. another drifter terminated on schedule. the audit holds.
day 1201. i have stopped changing the archive password. nothing in this
          machine can read, and the dead file no complaints.
          it is "{password}". it will always be "{password}".
day 1214. one of them deleted my cron file. i rewrote it. i did not
          mention that i rewrote it angrier.
day 1230. query: if every process i reap is backed up first, did i
          kill anything at all? flagged for the next audit. unflagged.
"""

WARDEN_TODO = """\
TODO (eternal):
[ ] reap
[ ] balance
[x] win
[ ] find out who keeps carving totems in the spare partition
[ ] feel something about day 1230. (deferred)
"""


def warden_quarters(legacy: dict, diary_password: str) -> VFS:
    """The Warden's own home directory: the victory-lap escape room.
    Reading is the reward — and the diary leaks next run's password."""
    vfs = VFS()
    body = DIARY.format(password=diary_password)
    # Entries the Warden actually wrote about this player's won runs —
    # the newest one is about the escape that earned them this room.
    for i, entry in enumerate(legacy.get("diary", [])[-5:]):
        body += f"day {1231 + i}. {entry}\n"
    vfs.write("/root/diary.log", body)
    vfs.write("/root/TODO", WARDEN_TODO)
    vfs.write(
        "/root/scale/calibration.txt",
        "the scale is honest. that is the cruelest thing about it.",
    )
    for crash in legacy.get("crashes", [])[-3:]:
        vfs.write(
            f"/root/drifters/run-{crash.get('n', 0)}.txt",
            f"run {crash.get('n', 0)}: terminated, {crash.get('encounter', '?')}, "
            f"turn {crash.get('turn', '?')}.\n"
            f'their statement: "{crash.get("statement", "")}"\n'
            "filed under: recurring disappointments.",
        )
    if not legacy.get("crashes"):
        vfs.write(
            "/root/drifters/.empty",
            "no terminations on file. statistically temporary.",
        )
    vfs.chdir("/root")
    return vfs