mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-31 07:23:06 +08:00
Chris Tate
7d2d2116ec
* Expand Node 24 filesystem descriptor and FileHandle support * Preserve filesystem options getter evaluation and record fixture baselines * Normalize the known Linux fiber warning in npm stderr comparisons
33 lines
1.9 KiB
TypeScript
33 lines
1.9 KiB
TypeScript
// Vector I/O preserves descriptor position and scatters only transferred bytes.
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import * as fs from "node:fs";
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import * as os from "node:os";
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import * as path from "node:path";
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const scratch = path.join(os.tmpdir(), `scr-3134-${process.pid}`);
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const fd = fs.openSync(scratch, "w+");
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try {
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const source = [Buffer.from("abc"), Buffer.alloc(0), Buffer.from("def")];
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console.log("writev current:", fs.writevSync(fd, source));
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console.log("writev positioned:", fs.writevSync(fd, [Buffer.from("XY"), Buffer.from("Z")], 1));
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const eof = [Buffer.alloc(2, 46)];
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console.log("position preserved:", fs.readvSync(fd, eof), eof[0]!.toString());
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const buffers = [Buffer.alloc(2, 46), Buffer.alloc(0), Buffer.alloc(6, 46)];
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console.log("readv scatter:", fs.readvSync(fd, buffers, 0), buffers[0]!.toString(), buffers[2]!.toString());
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console.log("readv tail:", fs.readvSync(fd, [Buffer.alloc(1)], 5));
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console.log("empty write bypass:", fs.writevSync(-1, []));
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fs.fdatasyncSync(fd);
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fs.ftruncateSync(fd, 3);
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console.log("truncate:", fs.fstatSync(fd).size);
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fs.ftruncateSync(fd, 8);
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console.log("extend:", fs.readFileSync(scratch).toString("hex"));
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fs.ftruncateSync(fd, -1);
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console.log("negative truncate:", fs.fstatSync(fd).size);
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fs.ftruncateSync(fd);
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try { fs.ftruncateSync(fd, 1.5); } catch (e) { const err = e as NodeJS.ErrnoException; console.log("length error:", err.name, err.code, err.message); }
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try { fs.readvSync(-1, []); } catch (e) { const err = e as NodeJS.ErrnoException; console.log("descriptor error:", err.name, err.code, err.message); }
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} finally {
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fs.closeSync(fd);
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fs.unlinkSync(scratch);
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}
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try { fs.fdatasyncSync(fd); } catch (e) { const err = e as NodeJS.ErrnoException; console.log("closed datasync:", err.name, err.code, err.message); }
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try { fs.readvSync(fd, [Buffer.alloc(0)]); } catch (e) { const err = e as NodeJS.ErrnoException; console.log("closed zero vector:", err.name, err.code, err.message); }
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