#!/usr/bin/env python
# Copyright (c) 2011 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""Windows can't run .sh files, so this is a small python wrapper around
update.sh.
"""

import os
import subprocess
import sys


def main():
  if sys.platform in ['win32', 'cygwin']:
    return 0

  # This script is called by gclient. gclient opens its hooks subprocesses with
  # (stdout=subprocess.PIPE, stderr=subprocess.STDOUT) and then does custom
  # output processing that breaks printing '\r' characters for single-line
  # updating status messages as printed by curl and wget.
  # Work around this by setting stderr of the update.sh process to stdin (!):
  # gclient doesn't redirect stdin, and while stdin itself is read-only, the
  # subprocess module dup()s it in the child process - and a dup()ed sys.stdin
  # is writable, try
  #   fd2 = os.dup(sys.stdin.fileno()); os.write(fd2, 'hi')
  # TODO: Fix gclient instead, http://crbug.com/95350
  return subprocess.call(
      [os.path.join(os.path.dirname(__file__), 'update.sh')] +  sys.argv[1:],
      stderr=sys.stdin)


if __name__ == '__main__':
  sys.exit(main())

@@ -34,17 +34,17 @@
  (c) 201
-1
+2
  The Chr
@@ -824,72 +824,13 @@
 ly, 
-the
+a
 %0A  #
- subprocess module dup()s it in the child process - and a
  dup
@@ -843,20 +843,16 @@
 ys.stdin
-%0A  #
  is writ
@@ -1092,25 +1092,53 @@
  stderr=
-sys.stdin
+os.fdopen(os.dup(sys.stdin.fileno()))
 )%0A%0A%0Aif _

Fix spurious '../llvm/configure: line 541: 0: Bad file descriptor' on clang roll try jobs.