Title: address failures under Redhat 6.2
Type: Stage:
Components: Library (Lib) Versions: Python 2.3
Status: closed Resolution: accepted
Dependencies: Superseder:
Assigned To: brett.cannon Nosy List: barry, brett.cannon, furie, kbk, nnorwitz, skip.montanaro, zenzen
Priority: normal Keywords: patch

Created on 2003-06-30 00:44 by zenzen, last changed 2003-09-19 01:03 by brett.cannon. This issue is now closed.

File name Uploaded Description Edit kbk, 2003-07-25 03:48 Catches RH Linux 6.2 "tzset" Error
Messages (15)
msg44143 - (view) Author: Stuart Bishop (zenzen) Date: 2003-06-30 00:44
A mangled version of this patch is also in bug:

Looks like tzset(3) is broken under Redhat 6.2 in a way
that wasn't being detected by configure. This
patch adds stricter tzset(3) checking to

msg44144 - (view) Author: Neal Norwitz (nnorwitz) * (Python committer) Date: 2003-07-02 03:03
Logged In: YES 

Stuart, what boxes did you test this on?  How confident are
you that this won't break some other platform?  I'm asking
to try to determine if this should go into 2.3final (we only
have 1 release candidate before release) or if this should
wait for 2.3.1.  Thanks for all your work on tzset.
msg44145 - (view) Author: Stuart Bishop (zenzen) Date: 2003-07-02 03:51
Logged In: YES 

This patch has only been tested under OS X.

I'm confident that it won't break other platforms.

I have no real way of proving that it addresses the problem it is 
supposed to solve, however, as I don't have access to a box that 
fails the tzset test in

The only reported platform that this is failing on is at, so we could just flag this
test as expected to fail on that platform, if someone knows how
to do that.
msg44146 - (view) Author: Brett Cannon (brett.cannon) * (Python committer) Date: 2003-07-03 20:16
Logged In: YES 

We can say it should fail under Linux, but we can't specify Red Hat 

I am keeping an eye on this patch for bug  #763153, but I have to 
wait until the OP applies it and tests it.

Looking at the patch, beyond not realizing that the X-mas time 
was GMT initially and the unneeded variable assignments, the 
patch looks fine to me (might want to comment that tzset does not 
return a value; rather non-standard) although I am no autoconf 
expert and I am assuming it just compiles this C code and any 
problems it just says  it fails.

Neal, what OS are you  running?  If it is non-OS X (sorry, that's 
what I am running as well) can you give the patch a try?
msg44147 - (view) Author: Barry A. Warsaw (barry) * (Python committer) Date: 2003-07-10 14:29
Logged In: YES 

This patch didn't break RH9.
msg44148 - (view) Author: Brett Cannon (brett.cannon) * (Python committer) Date: 2003-07-12 23:01
Logged In: YES 

Well, it didn't work for two people for Red Hat 6.2 .  Perhaps being 
more explicit for the test?  To give that a shot, I am uploading a 
patch that tests explicitly for AEDT as the daylight-savings 
timezone.  I snagged the code mostly from Modules/timemodule.c 

Now this is untested so there could be syntax problems.  I can't 
get a proper version of Autoconf to run on my system so I can run 
autoreconf.  Hopefully this will deal with the problem.
msg44149 - (view) Author: Brett Cannon (brett.cannon) * (Python committer) Date: 2003-07-13 02:27
Logged In: YES 

Quick update: I got autoreconf to work and it seems to work for 
me.  I also tested the C code in isolation and had no problems.  So 
I now I just need other people to apply the patch and say whether 
it works.
msg44150 - (view) Author: Skip Montanaro (skip.montanaro) * Date: 2003-07-16 20:05
Logged In: YES 

Works for me (Mac OS X)
msg44151 - (view) Author: Neal Norwitz (nnorwitz) * (Python committer) Date: 2003-07-22 22:46
Logged In: YES 

See this mail for a possible fix.

Stuart, is that correct?  It fixes the problem on RedHat 6.2
and doesn't break on RedHat 9.  The change is to define YEAR
as 365 * 24 * 3600, instead of adding 6 hours.
msg44152 - (view) Author: Brett Cannon (brett.cannon) * (Python committer) Date: 2003-07-22 23:04
Logged In: YES 

Well, it is looking like tzset_AEST is not working as a solution.  
Hopefully Neal's patch will do the trick.
msg44153 - (view) Author: Kurt B. Kaiser (kbk) * (Python committer) Date: 2003-07-25 03:48
Logged In: YES 

[kbk@float ~/PYSRC]$ ./python
Python 2.3c2 (#15, Jul 24 2003, 11:17:16)
[GCC egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import time   
>>> from os import environ
>>> victoria = 'AEST-10AEDT-11,M10.5.0,M3.5.0'
>>> environ['TZ'] = victoria
>>> time.tzset()
>>> time.tzname
('AEST', 'AEST')
Hm!!  Try a couple of things to try to see what's going on:
>>> victoria2 = 'AEST-10AEDT-11'
>>> environ['TZ'] = victoria2
>>> time.tzset()
>>> time.tzname
('AEST', 'AEDT')
>>> # try reversing the changeover
>>> victoria3 = 'AEST-10AEDT-11,M3.5.0,M10.5.0'
>>> environ['TZ'] = victoria3
>>> time.tzset()
>>> time.tzname
('AEST', 'AEDT')

ok, debug inittimezone:
Breakpoint 1, inittimezone (m=0x4014053c)
    at /home/kbk/PYTHON/python/dist/src/Modules/timemodule.c:608
608t = (time((time_t *)0) / YEAR) * YEAR;
(gdb) n
609p = localtime(&t);
(gdb) p asctime(localtime(&t))
$14 = 0x4013be00 "Wed Jan  1 16:00:00 2003\n"
(gdb) p localtime(&t)->tm_zone
$19 = 0x8162b78 "AEST"

[std time on Jan 1!! ...back up a day or so....]

(gdb) p t = t - 84000
$20 = 1041316800
(gdb) p localtime(&t)->tm_zone
$21 = 0x8162b90 "AEDT"
(gdb) p asctime(localtime(&t))
$22 = 0x4013be00 "Tue Dec 31 17:40:00 2002\n"

so Linux6.2 thinks AEDT switches to AEST in Jan, and six months
forward is still AEST.

xmas2002 is AEDT so config test passes but timemodule uses Jan 1
and flubs when setting tzname.

Need to do the config test later than xmas.

*** Apply Patch SF 762934

autoreconf && ./configure && make clean && make OPT=-g

extract from configure log:
checking for broken nice()... yes
checking for working tzset()... no
checking for tv_nsec in struct stat... no
checking whether mvwdelch is an expression... yes

[kbk@float ~/PYSRC]$ ./python
Python 2.3c2 (#18, Jul 24 2003, 22:40:09)
[GCC egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from test import test_time
>>> test_time.test_main()
test_asctime (test.test_time.TimeTestCase) ... ok
test_clock (test.test_time.TimeTestCase) ... ok
test_conversions (test.test_time.TimeTestCase) ... ok
test_data_attributes (test.test_time.TimeTestCase) ... ok
test_sleep (test.test_time.TimeTestCase) ... ok
test_strftime (test.test_time.TimeTestCase) ... ok
test_strptime (test.test_time.TimeTestCase) ... ok
test_tzset (test.test_time.TimeTestCase) ... ok

Ran 8 tests in 2.523s


make test:
227 tests OK.
28 tests skipped:
    test_aepack test_al test_bsddb185 test_bsddb3 test_cd test_cl
    test_curses test_email_codecs test_gl test_imgfile test_largefile
    test_linuxaudiodev test_macfs test_macostools test_nis
    test_normalization test_ossaudiodev test_pep277 test_plistlib
    test_scriptpackages test_socket_ssl test_socketserver
    test_sunaudiodev test_timeout test_unicode_file test_urllibnet
    test_winreg test_winsound
Those skips are all expected on linux2.
msg44154 - (view) Author: Brett Cannon (brett.cannon) * (Python committer) Date: 2003-07-25 06:48
Logged In: YES 

Thanks for the debugging work, Kurt.  I will take a good look at 
this when 2.4 dev starts.
msg44155 - (view) Author: Brett Cannon (brett.cannon) * (Python committer) Date: 2003-08-08 03:11
Logged In: YES 

OK, so Kurt's thinking and debugging all seem good to me.  I 
applied the patch and it worked correctly for me.  Can other 
people test it (not just Red Hat but also other platforms; OS X is 
covered by my test)?
msg44156 - (view) Author: Jordan Krushen (furie) Date: 2003-09-17 17:51
Logged In: YES 

I've tested kbk's patch on fresh installs of both RH 6.1 and 6.
2, and they both pass all (non-skipped) tests.
msg44157 - (view) Author: Brett Cannon (brett.cannon) * (Python committer) Date: 2003-09-19 01:03
Logged In: YES 

Kurt's patch has been checked in both to HEAD and release23-

Thanks, Kurt, for all your hard work.
Date User Action Args
2003-06-30 00:44:22zenzencreate