var ch = require("child_process")

var env = {}
for (var i = 0; i < 100; i ++) env["custom_"+i] = "value-"+i

var cp = ch.spawn("sh", ["-c", "env | sort | uniq | grep custom"],
                  { customFds: [0, 1, 2]
                  , cwd: process.cwd()
                  , env: env})
cp.on("exit", function (code) {
  if (code !== 0) {
    throw new Error("exited with "+code);
  }
})