src/vs/base/node/libc.ts
40 LOC · 38 covered · 2 uncovered · 5 ranges · 410 concepts · 3 introducers · 233 tests
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/*---------------------------------------------------------------------------------------------
libc.ts ×1
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import { familySync, MUSL } from 'detect-libc';
import * as Platform from '../common/platform.js';
/** The libc family the current process is linked against. */
export type LibcFamily = 'glibc' | 'musl';
let _cached: LibcFamily | undefined;
let _cacheValid = false;
/**
* Returns the libc family of the running Node process on Linux, or `undefined`
* on non-Linux platforms (where the question is meaningless).
*
* Delegates to the `detect-libc` package, which probes cheap signals first (the
* ELF interpreter of `/proc/self/exe`, then `/usr/bin/ldd`) and only falls back
* to Node's process report — with the libuv/socket section excluded so it does
* not peg the CPU on busy hosts. When detection is inconclusive we assume
* `glibc`, the dominant Linux libc.
*
* Cached after first call; libc never changes mid-process. This is the
* synchronous variant; add a promise-based `detectLibc` wrapping
* `detect-libc`'s async `family()` if a non-blocking caller ever needs one.
*/
export function detectLibcSync(): LibcFamily | undefined {
}
_cached = familySync() === MUSL ? 'musl' : 'glibc';
} else {
_cached = undefined;
}
return _cached;
}