--- /dev/null
+// the parent class for all fstreams.
+
+module.exports = Abstract
+
+var Stream = require('stream').Stream
+var inherits = require('inherits')
+
+function Abstract () {
+ Stream.call(this)
+}
+
+inherits(Abstract, Stream)
+
+Abstract.prototype.on = function (ev, fn) {
+ if (ev === 'ready' && this.ready) {
+ process.nextTick(fn.bind(this))
+ } else {
+ Stream.prototype.on.call(this, ev, fn)
+ }
+ return this
+}
+
+Abstract.prototype.abort = function () {
+ this._aborted = true
+ this.emit('abort')
+}
+
+Abstract.prototype.destroy = function () {}
+
+Abstract.prototype.warn = function (msg, code) {
+ var self = this
+ var er = decorate(msg, code, self)
+ if (!self.listeners('warn')) {
+ console.error('%s %s\n' +
+ 'path = %s\n' +
+ 'syscall = %s\n' +
+ 'fstream_type = %s\n' +
+ 'fstream_path = %s\n' +
+ 'fstream_unc_path = %s\n' +
+ 'fstream_class = %s\n' +
+ 'fstream_stack =\n%s\n',
+ code || 'UNKNOWN',
+ er.stack,
+ er.path,
+ er.syscall,
+ er.fstream_type,
+ er.fstream_path,
+ er.fstream_unc_path,
+ er.fstream_class,
+ er.fstream_stack.join('\n'))
+ } else {
+ self.emit('warn', er)
+ }
+}
+
+Abstract.prototype.info = function (msg, code) {
+ this.emit('info', msg, code)
+}
+
+Abstract.prototype.error = function (msg, code, th) {
+ var er = decorate(msg, code, this)
+ if (th) throw er
+ else this.emit('error', er)
+}
+
+function decorate (er, code, self) {
+ if (!(er instanceof Error)) er = new Error(er)
+ er.code = er.code || code
+ er.path = er.path || self.path
+ er.fstream_type = er.fstream_type || self.type
+ er.fstream_path = er.fstream_path || self.path
+ if (self._path !== self.path) {
+ er.fstream_unc_path = er.fstream_unc_path || self._path
+ }
+ if (self.linkpath) {
+ er.fstream_linkpath = er.fstream_linkpath || self.linkpath
+ }
+ er.fstream_class = er.fstream_class || self.constructor.name
+ er.fstream_stack = er.fstream_stack ||
+ new Error().stack.split(/\n/).slice(3).map(function (s) {
+ return s.replace(/^ {4}at /, '')
+ })
+
+ return er
+}