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openSync, mkdirSync, chmodSync and fchmodSync now accept the modes Node's parseFileMode accepts, an octal string or an integer in 0..2^32-1, and an argument whose static type is any or a union runs Node's validation ladder at run time instead of being refused by the build. openSync takes a string flag name or raw open(2) bits (an inline fs.constants.O_* mask is mapped to the target's bits), mkdirSync answers the first directory a recursive walk created and accepts the mode as the options argument itself, and every check throws Node's error with its code and message. The callback fs.open ladder accepts numeric flags through validateInt32 and parseFileMode, and an omitted, null or undefined mode opens with 0o666 as in Node. Octal strings that parse past 0xffffffff throw ERR_OUT_OF_RANGE. Differential corpus: node24-fs-open-sync.ts, node24-fs-mkdir-sync.ts, node24-fs-modes-sync.ts and node24-fs-callback-numeric-flags.cjs, each with a corpus-cost file; ts7 order baselines recorded.
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| ? "fs.mkdirObjVoidSync" | ||
| : "fs.mkdirObjSync"; | ||
| return { kind: "libCall", fn, args: [path, mode, recursive], type, loc }; | ||
| } |
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When a recursive-first mkdirSync initializer mutates the variable used for mode, the fast path still reads mode before running that initializer and creates the directory with stale permissions.
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fs.openSync,fs.mkdirSync,fs.chmodSyncandfs.fchmodSyncaccept the modes and flags Node accepts, including octal strings, numericopen(2)bits andO_*masks, and run Node's validation ladder at run time forany/union arguments instead of refusing them; the callbackfs.opentakes numeric flags and the0o666default.node24-fs-open-sync.ts,node24-fs-mkdir-sync.ts,node24-fs-modes-sync.ts,node24-fs-callback-numeric-flags.cjs) pin the behavior and its error codes against Node in the plain and sanitized lanes; the compatibility ledger and docs are regenerated.partial.