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Malte UblandClaude Opus 5.5
071be693d9
Node's writeFileSync accepts an open file descriptor where it accepts a path: it writes the data at the descriptor's current offset and leaves the descriptor open, since closeSync owns its lifetime. The static fs surface declared only the path forms, so `fs.writeFileSync(fd, text)` failed type mapping — the compiler was missing a documented overload, not a conversion. Declare the (fd, data) and (fd, data, "utf8" | "utf-8") forms in the node-fallback typings, route the call by the first argument's static f64 type to a new fs.writeFileSyncFd libfn, and implement it as scr_fs_write_file_fd: a write loop over the whole string through the descriptor-validating scr_fs_write_bytes, resuming short writes, with the descriptor operation's errno shape on failure. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
15 lines
551 B
TypeScript
15 lines
551 B
TypeScript
// writeFileSync(fd, data): Node accepts an open file descriptor where it
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// accepts a path, writes the whole data from the descriptor's current
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// offset, and leaves the descriptor open.
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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(), `scriptc-write-fd-${process.pid}.txt`);
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const fd = fs.openSync(scratch, "w");
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fs.writeFileSync(fd, "hello ");
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fs.writeFileSync(fd, "world");
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fs.closeSync(fd);
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console.log(fs.readFileSync(scratch, "utf8"));
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fs.rmSync(scratch);
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