Bug 1236306 - Some of dnf's subcommands can't handle pipe
Summary: Some of dnf's subcommands can't handle pipe
Alias: None
Product: Fedora
Classification: Fedora
Component: dnf   
(Show other bugs)
Version: 22
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Michael Mráka
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2015-06-27 15:01 UTC by kealthou
Modified: 2015-08-19 07:51 UTC (History)
8 users (show)

Fixed In Version: dnf-plugins-core-0.1.10-1.fc23
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2015-08-15 02:14:18 UTC
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Result of "dnf group list | head -n 1" (14.17 KB, text/plain)
2015-06-27 15:01 UTC, kealthou
no flags Details

Description kealthou 2015-06-27 15:01:54 UTC
Created attachment 1043883 [details]
Result of "dnf group list | head -n 1"

Description of problem:
Some, for instance list and group, can't handle pipe properly, and throw "[Errno 32] Broken pipe".

Others can, for instance info and search, but when used with "head -n 0", go wrong. In this case, I don't think it causes a problem, from a practical viewpoint.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
$ dnf list | head -n 1
Last metadata expiration check performed 0:38:32 ago on Sat Jun 27 23:18:33 2015.
[Errno 32] Broken pipe

$ dnf search dnf | head -n 0
Traceback (most recent call last):
  File "/usr/lib/python2.7/logging/__init__.py", line 883, in emit
  File "/usr/lib/python2.7/logging/__init__.py", line 843, in flush
IOError: [Errno 32] Broken pipe
Logged from file cli.py, line 802

Comment 1 Honza Silhan 2015-06-29 15:27:16 UTC
Thanks for the report. We'll take a look. Btw yum does that too.

Comment 2 Honza Silhan 2015-07-29 12:07:53 UTC
Do you now what's the cause of the problem, Michael?

Comment 3 Michael Mráka 2015-08-06 10:23:15 UTC
Python by default does not ignore SIGPIPE.

Fixed in
commit 0e940a58d13bf4c22d42881cbd3b83bce12adb59
    ignore SIGPIPE (RhBug:1236306)

Comment 4 Fedora Update System 2015-08-10 10:05:45 UTC
dnf-plugins-core-0.1.10-1.fc23,dnf-1.1.0-1.fc23,hawkey-0.6.0-1.fc23 has been submitted as an update for Fedora 23.

Comment 5 Fedora Update System 2015-08-10 10:49:30 UTC
dnf-plugins-core-0.1.10-1.fc22,dnf-1.1.0-1.fc22,hawkey-0.6.0-1.fc22 has been submitted as an update for Fedora 22.

Comment 6 Fedora Update System 2015-08-11 02:10:44 UTC
Package dnf-plugins-core-0.1.10-1.fc22, dnf-1.1.0-1.fc22, hawkey-0.6.0-1.fc22:
* should fix your issue,
* was pushed to the Fedora 22 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing dnf-plugins-core-0.1.10-1.fc22 dnf-1.1.0-1.fc22 hawkey-0.6.0-1.fc22'
as soon as you are able to.
Please go to the following url:
then log in and leave karma (feedback).

Comment 7 Fedora Update System 2015-08-15 02:14:18 UTC
dnf-plugins-core-0.1.10-1.fc22, hawkey-0.6.0-1.fc22, dnf-1.1.0-2.fc22 has been pushed to the Fedora 22 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 8 Fedora Update System 2015-08-19 07:51:34 UTC
dnf-plugins-core-0.1.10-1.fc23, hawkey-0.6.0-1.fc23, dnf-1.1.0-2.fc23 has been pushed to the Fedora 23 stable repository.  If problems still persist, please make note of it in this bug report.

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