#!/usr/bin/python3
"""envrun.py — read NAME=base64value lines from stdin until an empty line, put them in the environment, exec argv.
Lets DooPlex hand a secret to a command in the browser LXC without it ever touching a command line."""
import base64, os, sys
env = dict(os.environ)
for line in sys.stdin:
    line = line.rstrip("\n")
    if not line:
        break
    k, v = line.split("=", 1)
    env[k] = base64.b64decode(v).decode()
os.execvpe(sys.argv[1], sys.argv[1:], env)