Bug 1320322

The problem is caused by code in the parsetime subprogram in parsetime.y . exectm is moved to currtm after exectm.tm_isdst is set to -1. Nothing ever resets currtm.tm_isdst to either 0 or 1. When execution reaches line 508, currtm.tm_isdst is still -1, causing the test to pass, reducing the scheduled time by one hour. The proposed fix moves exectm to currtm before exectm.tm_isdst is set to -1.

The proposed fix (based on line numbers in at-3.1.10-48.el6.i686 is 

479a480
 > memcpy(&currtm,&exectm,sizeof(currtm)); 
482d482 
< memcpy(&currtm,&exectm,sizeof(currtm));

*** Bug 1316553 has been marked as a duplicate of this bug. ***

OLD package:
at-3.1.10-48.el6.i686

::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
:: [   LOG    ] :: Test
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

:: [  BEGIN   ] :: Display date and time :: actually running 'date'
Thu Oct 20 06:51:42 UTC 2016
:: [   PASS   ] :: Display date and time (Expected 0, got 0)
:: [  BEGIN   ] :: Add event for the time +1h without UTC :: actually running ' echo 'logger TEST' |at 07:51 '
job 1 at 2016-10-20 07:51
:: [   PASS   ] :: Add event for the time +1h without UTC (Expected 0, got 0)
:: [   PASS   ] :: File '/var/tmp/tmp.e3NBxghJ80' should contain '07:51' 
:: [  BEGIN   ] :: Add event for time + 1h vith UTC :: actually running ' echo 'logger TEST' |at 07:51 UTC'
job 2 at 2016-10-20 06:51
:: [   PASS   ] :: Add event for time + 1h vith UTC (Expected 0, got 0)
:: [   FAIL   ] :: File '/var/tmp/tmp.0jpMp2Kj6P' should contain '07:51' 
'f73d43b8-741d-47d7-aab1-5b4089ab955e'
Test result: FAIL


NEW package:
at-3.1.10-49.el6.i686
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
:: [   LOG    ] :: Test
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

:: [  BEGIN   ] :: Display date and time :: actually running 'date'
Wed Oct 19 13:22:13 UTC 2016
:: [   PASS   ] :: Display date and time (Expected 0, got 0)
:: [  BEGIN   ] :: Add event for the time +1h without UTC :: actually running ' echo 'logger TEST' |at 14:22 '
job 1 at 2016-10-19 14:22
:: [   PASS   ] :: Add event for the time +1h without UTC (Expected 0, got 0)
:: [   PASS   ] :: File '/var/tmp/tmp.Uz20JfAkyW' should contain '14:22' 
:: [  BEGIN   ] :: Add event for time + 1h vith UTC :: actually running ' echo 'logger TEST' |at 14:22 UTC'
job 2 at 2016-10-19 14:22
:: [   PASS   ] :: Add event for time + 1h vith UTC (Expected 0, got 0)
:: [   PASS   ] :: File '/var/tmp/tmp.Ozt52tJP7g' should contain '14:22' 
'f5835646-25fb-4a00-addd-6c1d79d325db'
Test result: PASS

Since the test passed on all architectures => verified

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2017-0703.html