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fix: implement fd_fdstat_get WASIp1 function #55

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Merged
uhyo merged 1 commit into from
Jan 13, 2025
Merged

fix: implement fd_fdstat_get WASIp1 function #55

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15 changes: 15 additions & 0 deletions packages/wasi-preview1/src/dataStructure.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -35,6 +35,21 @@ export function writeFilestat(
view.setBigUint64(56, ctim, true);
}

export function writeFdstat(
memory: ArrayBuffer,
ptr: number,
filetype: number,
fs_flags: number,
fs_rights_base: bigint,
fs_rights_inheriting: bigint
) {
const view = new DataView(memory, ptr, 24);
view.setUint8(0, filetype);
view.setUint16(2, fs_flags, true);
view.setBigUint64(8, fs_rights_base, true);
view.setBigUint64(16, fs_rights_inheriting, true);
}

export function generateOneReaddirEntry(
ent: DirEntry,
index: number
Expand Down
22 changes: 21 additions & 1 deletion packages/wasi-preview1/src/wasi.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@ import * as error from "./error.js";
import {
generateOneReaddirEntry,
getFiletypeOfStat,
writeFdstat,
writeFilestat,
writePrestatDir,
} from "./dataStructure.js";
Expand Down Expand Up @@ -304,7 +305,26 @@ export function initWASI(config: WASIConfig): WASIAPI & WASIMeta {
}
},
fd_fdstat_get: (fd, ret_buf) => {
throw new Error("Function not implemented.");
const fdObj = fs.get(fd);
if (fdObj === undefined) {
return error.badf;
}
try {
const stat = fs.stat(fdObj);
// fd_write | path_create_directory | path_open | fd_readdir | path_filestat_get | fd_filestat_get
const fs_flags = 0b0001_0010_0011_0001_0010_0000n;
writeFdstat(
memory(),
ret_buf,
getFiletypeOfStat(stat),
0,
fs_flags,
fs_flags
);
return 0;
} catch (e) {
return handleFsError(e, debug);
}
},
random_get: (buf, buf_len): number => {
crypto.randomFillSync(new Uint8Array(memory(), buf, buf_len));
Expand Down
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