Samba + Linux + Timezone and summer time adjustement
jean-marc.desperrier at certplus.com
Thu Mar 2 14:48:40 GMT 2000
I'm encountering an anormal behavior, and I think the problem is coming
from an incorrect convertion from local time to unix time (seconds since
1970 in GMT) on a filesystem mounted with smbmount.
The problem occurs under linux on a disk mounted with smbmount from an
Samba version is 2.0.5a, linux distribution is Red Hat 6.1 (2.2.12) , NT
The time for the files on that disk are stored in local time, which here
is CET with summer time adjustements. (CET = UTC+1, or UTC+2 in summer
When I create a new file, the file has the same time under Linux and NT.
But when I watch some old file from august last year, linux and NT
disagree by one hour.
I made some tries with the TZ variable, and discovered that if I change
TZ to UTC, the time for the file I just created becomes one hour
earlier, but the time for the files in august becomes 2 hours earlier.
Here is a table that makes this clearer :
Linux (TZ=UTC) Linux (TZ=CET) NT
temp file 02/03/00 11:53 02/03/00 12:53 02/03/00 12:53
old file 27/08/99 14:59 27/08/99 16:59 27/08/99 15:59
I think what happens is the following : The date of the file is first
converted to a unix time (seconds since 1970 in GMT), and then ls -l
interprets this value for display.
But when displaying the value, ls -l takes into account the summer time,
and it was not taken into account, when converting the local time to
What component exactly does the time convertion in this case ?
How could it be changed so that the behaviour be always the same as the
one of the kernel ?
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