readfile-stdin.js

// usage: cat readfile-stdin.js | node readfile-stdin.js
var fs = require('fs');

fs.open('/dev/stdin', 'r', function(er, fd) {
  console.error('open', er, fd);
  if (er) throw er;
  var buf
  fs.fstat(fd, function(er, st) {
    console.error('stat', er, st);
    if (er) throw er;
    var size = st.size;
    var buffer = new Buffer(size);
    var pos = 0;
    fs.read(fd, buffer, pos, size - pos, pos, function (er, bytes) {
      console.error('read', er, bytes);
      console.error('data', buffer.toString());
      fs.close(fd, function(er) {
        console.error('close', er);
        if (er) throw er;
      });
    });
  });
});


/* output:

open null 8
stat null { dev: 0,
  ino: 298218304,
  mode: 4528,
  nlink: 0,
  uid: 24561,
  gid: 20,
  rdev: 0,
  size: 743,
  blksize: 16384,
  blocks: 1,
  atime: Wed Jun 20 2012 10:00:21 GMT-0700 (PDT),
  mtime: Wed Jun 20 2012 10:00:21 GMT-0700 (PDT),
  ctime: Wed Jun 20 2012 10:00:21 GMT-0700 (PDT) }
read { [Error: UNKNOWN, read] errno: -1, code: 'UNKNOWN' } 0
data 
close null
*/