Bad file descriptor error occurs if random library is imported before closing FDs #67361

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1. waynesong commented on Jan 5, 2015

   

   waynesongmannequin

   on Jan 5, 2015

   MannequinAuthor

   More actions

   The following script:

   import os
   import resource
   import random
   
   print("1")
   
   for fd in range(resource.getrlimit(resource.RLIMIT_NOFILE)[0]):
       try:
           if fd not in range(0, 3):
               os.close(fd)
       except os.error:
           pass
   
   print("2")
   print(os.urandom(32))
   print("3")

   Crashes with the following output:

   1
   2
   Traceback (most recent call last):
     File "test.py", line 17, in <module>
       print(os.urandom(32))
   OSError: [Errno 9] Bad file descriptor

   On an Ubuntu 14.04 install (in VirtualBox). It seems to run correctly on Mac OS X. The script runs fine if I don't import random at the top.
2. waynesong

   added

   stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

   type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

   on Jan 5, 2015
3. vstinner commented on Jan 5, 2015

   

   vstinner

   on Jan 5, 2015

   Member

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   This issue is a duplicate of the issue bpo-21207 which was already fixed in Python 3.4.1.
4. vstinner

   closed this as completedon Jan 5, 2015
5. ezio-melotti

   transferred this issue fromon Apr 10, 2022