#!/usr/bin/env python2

import os
import sys
import subprocess
import re
from shutil import copyfile
runtime_libs = ['libc', 
                'libdl',
                'libm',
                'libpthread', 
                'libutil',
                'libnss_dns', 
                'libresolv', 
                'librt']
  
def parse_libs (bin_path) :
  print (bin_path)
  ldd_out = subprocess.check_output(['ldd', bin_path])
  lib_list = []
  for line in ldd_out.splitlines():
    match = re.match(r'\t(.*) => (.*) \(0x', line)
    if match and match.group(1) and match.group(2):
      full_lib_name = match.group(1)
      name_match = re.match(r'([\w\d]*)(\.*)(.*)', full_lib_name)
      if name_match:
        lib_name = name_match.group(1)
        lib_path = match.group(2)
        if lib_name not in runtime_libs : 
          lib_list.append((name_match.group(1), match.group(2)))
  return lib_list

def make_exec(path) :
  mode = os.stat(path).st_mode
  mode |= (mode & 0o444) >> 2    # copy R bits to X
  os.chmod(path, mode)

def gen_manifest(app_name, bin_name, g_path) :
  m_path = g_path + '/LibOS/shim/test/apps/' + app_name + "/" + app_name +"." + "manifest"
  print (m_path)
  mf = open(m_path, "w")
  make_exec(m_path)
  mf.write("#!" + g_path + "/Runtime/pal_loader \n")
  mf.write("loader.preload = file:../../../../../Runtime/libsysdb.so \n")
  
  # Get Path of Binary
  bin_path = subprocess.check_output(['which', bin_name]).strip()
  mf.write('loader.exec = file:' + bin_path + '\n')
  mf.write('loader.execname = ' + bin_name + '\n')
  mf.write('loader.env.LD_LIBRARY_PATH = /graphene:/graphene/resolv:/host:/usr/local/lib:/usr/lib:/usr/lib/x86_64-linux-gnu \n')
  mf.write('loader.env.PATH = /usr/local/bin:/usr/bin:/bin \n' + 
 	   'loader.env.USERNAME = \n' + 
           'loader.env.PWD = \n' +
           'loader.debug_type = none \n')
  mf.write('\n')

  # File system setting
  mf.write('fs.mount.lib1.type = chroot \n' +
           'fs.mount.lib1.path = /graphene \n' +
           'fs.mount.lib1.uri = file:../../../../../Runtime \n \n')

  mf.write('fs.mount.lib2.type = chroot \n' +
           'fs.mount.lib2.path = /host \n' +
	   'fs.mount.lib2.uri = file:/lib/x86_64-linux-gnu \n \n')
  
  mf.write('fs.mount.bin.type = chroot \n' +
	   'fs.mount.bin.path = /bin \n' +
	   'fs.mount.bin.uri = file:/bin \n \n')

  mf.write('fs.mount.usr.type = chroot \n' +
	   'fs.mount.usr.path = /usr \n' +
	   'fs.mount.usr.uri = file:/usr \n \n')

  mf.write('fs.mount.etc.type = chroot \n' +
	   'fs.mount.etc.path = /etc \n' +
	   'fs.mount.etc.uri = file: \n \n')
  
  # Set Dependent Libraries
  
  mf.write('sgx.trusted_files.ld = file:../../../../../Runtime/ld-linux-x86-64.so.2 \n' +
           'sgx.trusted_files.libc = file:../../../../../Runtime/libc.so.6 \n' +
           'sgx.trusted_files.libdl = file:../../../../../Runtime/libdl.so.2 \n' +
           'sgx.trusted_files.libm = file:../../../../../Runtime/libm.so.6 \n' +
           'sgx.trusted_files.libpthread = file:../../../../../Runtime/libpthread.so.0 \n' + 
           'sgx.trusted_files.libutil = file:../../../../../Runtime/libutil.so.1 \n' + 
           'sgx.trusted_files.libnss3 = file:../../../../../Runtime/libnss_dns.so.2 \n' +
           'sgx.trusted_files.libresolv = file:../../../../../Runtime/libresolv.so.2 \n')
  
  lib_list = parse_libs(bin_path)
  for lib_name, lib_path in lib_list :
    print ("lib name: " + lib_name)
    print ("lib path: " + lib_path)
    mf.write('sgx.trusted_files.' + lib_name + ' = file:' + lib_path + '\n')

  mf.write('\n')

  #	   'sgx.allowed_files.usr = file:/usr \n')

  mf.close()
   
if __name__ == "__main__":
  if len(sys.argv) != 4: 
   print ("Usage: gen_manifest [App Name] [bin_name] [Graphene Path]")
   exit()
  app_name = sys.argv[1]
  bin_name = sys.argv[2]
  g_path = sys.argv[3]

  gen_manifest(app_name, bin_name, g_path)