Merge pull request benoitc#2731 from benoitc/daemonize-dev-null-stdin-inheritable

Ensure fd 0 stdin </dev/null is always inheritable Fixed benoitc#2727 .

Author: javabrett

THANKS

@@ -109,6 +109,7 @@ Kyle Mulka <repalviglator@yahoo.com>
 Lars Hansson <romabysen@gmail.com>
 Leonardo Santagada <santagada@gmail.com>
 Levi Gross <levi@levigross.com>
+licunlong <shenxiaogll@163.com>
 Łukasz Kucharski <lkucharski@leon.pl>
 Mahmoud Hashemi <mahmoudrhashemi@gmail.com>
 Malthe Borch <mborch@gmail.com>

gunicorn/util.py

@@ -486,7 +486,10 @@ def daemonize(enable_stdio_inheritance=False):
  closerange(0, 3)
 
  fd_null = os.open(REDIRECT_TO, os.O_RDWR)
+ # PEP 446, make fd for /dev/null inheritable
+ os.set_inheritable(fd_null, True)
 
+ # expect fd_null to be always 0 here, but in-case not ...
  if fd_null != 0:
  os.dup2(fd_null, 0)