Note: This is a beta release of Red Hat Bugzilla 5.0. The data contained within is a snapshot of the live data so any changes you make will not be reflected in the production Bugzilla. Also email is disabled so feel free to test any aspect of the site that you want. File any problems you find or give feedback here.
Bug 81951 - EINTR for commands.getoutput()
Summary: EINTR for commands.getoutput()
Keywords:
Status: CLOSED WORKSFORME
Alias: None
Product: Red Hat Public Beta
Classification: Retired
Component: python
Version: phoebe
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Mihai Ibanescu
QA Contact: Brock Organ
URL:
Whiteboard:
Depends On:
Blocks: 79579
TreeView+ depends on / blocked
 
Reported: 2003-01-15 18:25 UTC by Harald Hoyer
Modified: 2007-04-18 16:50 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2003-02-03 09:56:59 UTC


Attachments (Terms of Use)

Description Harald Hoyer 2003-01-15 18:25:28 UTC
commands.getoutput() does 
#define EINTR            4      /* Interrupted system call */

This doesn't make any sense to me..

  File "./netconfpkg/NCDevice.py", line 282, in save
    broadcast = commands.getoutput('ipcalc --broadcast ' + \
  File "//usr/lib/python2.2/commands.py", line 44, in getoutput
    return getstatusoutput(cmd)[1]
  File "//usr/lib/python2.2/commands.py", line 54, in getstatusoutput
    text = pipe.read()
IOError: [Errno 4] Interrupted system call

Comment 1 Mihai Ibanescu 2003-01-17 20:54:55 UTC
Not sure I understand - what is the problem?

Comment 2 Harald Hoyer 2003-01-20 10:55:57 UTC
  File "//usr/lib/python2.2/commands.py", line 54, in getstatusoutput
    text = pipe.read()
IOError: [Errno 4] Interrupted system call

seems like pipe.read() gets interrupted ... this must not happen!

Comment 3 Mihai Ibanescu 2003-01-21 13:14:42 UTC
Why don't you try-except it? This is what you're supposed to do anyway - there
are plenty of other problems that can happen and could raise IOError, besides
EINTR. You do that in a C program - why can't you do it in python?

It's arguable if python, as a high-level language, should hide or propagate this
error upstream - but exception handling is usually a good practice.



Comment 4 Harald Hoyer 2003-01-21 13:19:15 UTC
it is correct that I should catch the exceptions.. I did, and always wondered
why the execution failed there and then... this is strange behaviour, cause 1
minute later it workx.. do you want a testcase?

Comment 5 Mihai Ibanescu 2003-01-21 13:22:19 UTC
Sure, please attach it. I'd like to see how python 1.5.2 behaves, as well as
python 2.2.2 on pre-Phoebe.

Comment 6 Mihai Ibanescu 2003-01-31 17:39:38 UTC
Harald, does this still happen?

Comment 7 Harald Hoyer 2003-02-03 09:56:59 UTC
no, thx... haven't seen that. Must have been the kernel.


Note You need to log in before you can comment on or make changes to this bug.