/usr/share/buddycloud-server/rsm_walk.js is in buddycloud-server 0.3.5-2.
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 22 23 24 25 26 27 | // Generated by CoffeeScript 1.3.3
(function() {
  module.exports = function(iter, cb) {
    var seenOffsets, walk;
    seenOffsets = {};
    walk = function(offset) {
      return iter(offset, function(err, lastOffset) {
        if (err) {
          return cb(err);
        }
        if (lastOffset) {
          if (seenOffsets.hasOwnProperty(lastOffset)) {
            return cb(new Error("RSM offset loop detected: " + offset + " already seen"));
          } else {
            seenOffsets[lastOffset] = true;
            return walk(lastOffset);
          }
        } else {
          return cb();
        }
      });
    };
    return walk();
  };
}).call(this);
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