/usr/lib/nodejs/is-stream/index.js is in node-is-stream 1.1.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | 'use strict';
var isStream = module.exports = function (stream) {
return stream !== null && typeof stream === 'object' && typeof stream.pipe === 'function';
};
isStream.writable = function (stream) {
return isStream(stream) && stream.writable !== false && typeof stream._write === 'function' && typeof stream._writableState === 'object';
};
isStream.readable = function (stream) {
return isStream(stream) && stream.readable !== false && typeof stream._read === 'function' && typeof stream._readableState === 'object';
};
isStream.duplex = function (stream) {
return isStream.writable(stream) && isStream.readable(stream);
};
isStream.transform = function (stream) {
return isStream.duplex(stream) && typeof stream._transform === 'function' && typeof stream._transformState === 'object';
};
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