Charlie CheeverandClaude Opus 5.5
0e48adacce
`withAppServer` reuses a server an ancestor process started, and walked the ancestors with `ps -o ppid=`, which has no Windows build: there the walk stopped at the immediate parent. `exact api-test` runs `exact test`, which runs `agent.mjs --test`, so that grandchild never saw the owner, tried to start a second server on the owner's port, and the run exited 1. The ancestors are now walked up one table of every process's parent: CIM's `Win32_Process` (`ProcessId`, `ParentProcessId`) on Windows, as `commandLine` already reads it there, and `ps -A -o pid=,ppid=` elsewhere, one process instead of one per level. The walk stops at an unknown pid, the root, or a pid already seen. Win32_Process: https://learn.microsoft.com/windows/win32/cimwin32prov/win32-process scripts/verify.test.mjs passes on macOS (44), including the nested api-test drive and a new test of the table and the walk over POSIX and Windows output. Not run on Windows. Closes issues/closed/20261113-windows-nested-api-test-misses-the.md. Co-Authored-By: Claude Opus 5.5 <[email protected]>
39 lines
2.0 KiB
JavaScript
39 lines
2.0 KiB
JavaScript
/** Other processes: whether one is alive, its command line, and this process's ancestors. */
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import { spawnSync } from 'node:child_process';
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export const alive = (pid) => { try { process.kill(pid, 0); return true; } catch (e) { return e.code === 'EPERM'; } };
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// A process's command line: `ps` has no Windows build, where CIM's Win32_Process reports it. Empty when neither answers.
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export const commandLine = (pid) => (process.platform === 'win32'
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? spawnSync('powershell.exe', ['-NoProfile', '-NonInteractive', '-Command', `(Get-CimInstance Win32_Process -Filter 'ProcessId=${Number(pid)}').CommandLine`], { encoding: 'utf8' })
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: spawnSync('ps', ['-o', 'command=', '-p', String(pid)], { encoding: 'utf8' })).stdout?.trim() ?? '';
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/** Every process's parent, by pid: `ps` has no Windows build, where CIM's Win32_Process reports them, as for
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* `commandLine`. Empty when neither answers. */
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function processParents() {
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const r = process.platform === 'win32'
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? spawnSync('powershell.exe', ['-NoProfile', '-NonInteractive', '-Command', 'Get-CimInstance Win32_Process | ForEach-Object { "$($_.ProcessId) $($_.ParentProcessId)" }'], { encoding: 'utf8' })
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: spawnSync('ps', ['-A', '-o', 'pid=,ppid='], { encoding: 'utf8' });
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return parentsOf(r.stdout ?? '');
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}
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/** `<pid> <parent pid>` lines as a map from pid to parent pid. */
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export function parentsOf(text) {
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const parents = new Map();
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for (const line of text.split('\n')) {
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const [pid, parent] = line.trim().split(/\s+/).map(Number);
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if (Number.isInteger(pid) && Number.isInteger(parent)) parents.set(pid, parent);
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}
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return parents;
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}
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/** The ancestors' pids of the process whose parent is `pid`, nearest first, as strings: `pid`, its parent, and so
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* on up to the first pid that `parents` does not know, the root (0 or 1), or a cycle. */
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export function ancestors(pid = process.ppid, parents = processParents()) {
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const out = [];
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while (pid > 1 && out.length < 32 && !out.includes(String(pid))) {
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out.push(String(pid));
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pid = parents.get(pid) ?? 0;
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}
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return out;
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}
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