Bug 982711 - mgetty locking fails with lockdev patch
Summary: mgetty locking fails with lockdev patch
Alias: None
Product: Fedora
Classification: Fedora
Component: mgetty
Version: 19
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Michal Sekletar
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2013-07-09 16:11 UTC by Sarantis Paskalis
Modified: 2013-07-23 01:08 UTC (History)
1 user (show)

Fixed In Version: mgetty-1.1.36-22.fc19
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2013-07-23 01:08:20 UTC
Type: Bug

Attachments (Terms of Use)

Description Sarantis Paskalis 2013-07-09 16:11:39 UTC
Description of problem:

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

How reproducible:

Steps to Reproduce:

Actual results:

Expected results:

Additional info:

Comment 1 Sarantis Paskalis 2013-07-09 16:20:28 UTC
(Sorry for the empty comment)

Description of problem:
mgetty fails after upgrading to F19 from F18

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

How reproducible:

Relevant log lines:

07/09 08:58:00  opening voice modem device
07/09 08:58:00   voice open 'ttyACM0'
07/09 08:58:00   makelock(ttyACM0) called
07/09 08:58:00  lock not made: dev_lock() failed: Success
07/09 08:58:05  opening voice modem device
07/09 08:58:05   voice open 'ttyACM0'
07/09 08:58:05   makelock(ttyACM0) called
07/09 08:58:05  lock not made: dev_lock() failed: Success
07/09 08:58:10  opening voice modem device
07/09 08:58:10   voice open 'ttyACM0'
07/09 08:58:10   makelock(ttyACM0) called
07/09 08:58:10  lock not made: dev_lock() failed: Success

Log with mgetty rebuilt without the lockdev patch:

07/09 19:03:10  opening voice modem device
07/09 19:03:10   voice open 'ttyACM0'
07/09 19:03:10   makelock(ttyACM0) called
07/09 19:03:10   do_makelock: lock='/var/lock/LCK..ttyACM0'
07/09 19:03:10   lock made
07/09 19:03:10  opened voice modem device /dev/ttyACM0

Other notes: 
"lockdev -l ttyACM0" and "lockdev -u ttyACM0" work from the commandline.

I have not built the source with the patch, but glancing it, it seems that it does not initialize the device_name parameter (see the log line "lock not made: dev_lock() failed: Success")

Comment 2 Michal Sekletar 2013-07-10 09:39:54 UTC
Thank you for the report. While implementing this functionality I had issues with not initialized devname parameter, however I put code into the main function which always initializes devname passed later on to lockdev API.

I will double check the patch, anyway thanks for the report. Will get back to you shortly.

Comment 3 Michal Sekletar 2013-07-11 16:09:07 UTC
I tried to reproduce the issue but mgetty locked device just fine. I started mgetty on ttyS0, connected to it and tried to run minicom on ttyS0 as well. Minicom refused to run and printed 'Device /dev/ttyS0 is locked.'

That being said, I think I know what is the issue here. I modified the patch in way which should work now for all tools (not only mgetty) which are using affected module (locks.c). I built new version for rawhide in koji. See [1] and find attached builds. Could you please verify that it works for you? Thanks.

[1] http://koji.fedoraproject.org/koji/buildinfo?buildID=432842

Comment 4 Sarantis Paskalis 2013-07-12 12:37:52 UTC
I confirm that the build in comment #3  fixed the locking issue I reported.

Please release an update for Fedora 19 as well.


Comment 5 Fedora Update System 2013-07-12 13:58:48 UTC
mgetty-1.1.36-22.fc19 has been submitted as an update for Fedora 19.

Comment 6 Michal Sekletar 2013-07-12 14:00:25 UTC
Would be great if you could test F19 update and leave karma. Thanks.

Comment 7 Fedora Update System 2013-07-13 01:50:39 UTC
Package mgetty-1.1.36-22.fc19:
* should fix your issue,
* was pushed to the Fedora 19 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing mgetty-1.1.36-22.fc19'
as soon as you are able to.
Please go to the following url:
then log in and leave karma (feedback).

Comment 8 Fedora Update System 2013-07-23 01:08:20 UTC
mgetty-1.1.36-22.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

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