diff --git a/lib/fs.js b/lib/fs.js index dc60d35ad38773..8e66d2993db06a 100644 --- a/lib/fs.js +++ b/lib/fs.js @@ -1942,7 +1942,8 @@ function ReadStream(path, options) { this.flags = options.flags === undefined ? 'r' : options.flags; this.mode = options.mode === undefined ? 0o666 : options.mode; - this.start = options.start; + this.start = typeof this.fd !== 'number' && options.start === undefined ? + 0 : options.start; this.end = options.end; this.autoClose = options.autoClose === undefined ? true : options.autoClose; this.pos = undefined; diff --git a/test/parallel/test-fs-read-stream.js b/test/parallel/test-fs-read-stream.js index 04c10b5a4415c1..6748c68b52596c 100644 --- a/test/parallel/test-fs-read-stream.js +++ b/test/parallel/test-fs-read-stream.js @@ -157,6 +157,20 @@ assert.throws(function() { })); } +{ + // Verify that end works when start is not specified. + const stream = new fs.createReadStream(rangeFile, { end: 1 }); + stream.data = ''; + + stream.on('data', function(chunk) { + stream.data += chunk; + }); + + stream.on('end', common.mustCall(function() { + assert.strictEqual('xy', stream.data); + })); +} + { // pause and then resume immediately. const pauseRes = fs.createReadStream(rangeFile);