@struktoai/mirage-core/dist/runtime/stat.js

A Unified Virtual Filesystem For AI Agents

// ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
import { BLKSIZE, BLOCK_UNIT, ident } from "../utils/stat_view.js";
/**
 * The POSIX stat a runtime reports for one mount row. `uid` and `gid`
 * are what a row without an owner reports (a host process's own, 0 in a
 * sandbox), and `unknownMs` what an unknown modification time reads as.
 * `path` names the inode when the row names none of its own. Mirrors
 * Python's `posix_stat`.
 */
export function posixStat(row, path, prefix, fallback = {}) {
    const mtime = row.mtimeMs ?? fallback.unknownMs ?? 0;
    return {
        mode: row.mode,
        ino: ident(row.name ?? path),
        dev: ident(prefix),
        nlink: row.isDir ? 2 : 1,
        uid: row.uid ?? fallback.uid ?? 0,
        gid: row.gid ?? fallback.gid ?? 0,
        rdev: row.rdev ?? 0,
        size: row.size,
        atimeMs: row.atimeMs ?? mtime,
        mtimeMs: mtime,
        ctimeMs: mtime,
        blksize: BLKSIZE,
        blocks: Math.ceil(row.size / BLOCK_UNIT),
    };
}
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