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ru.unix.bsd
- RU.UNIX.BSD ------------------------------------------------------------------
From : Eugene Grosbein 2:5006/1 11 Nov 2003 01:54:24
To : Dmitry Ivanov
Subject : Re: отмена летнего/зимнего времени
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EG>> Дык не зря у крона есть опция -s.
DI> У какого крона? В NetBSD vixie cron, так у него
DI> что-то вообще опций не обнаружено.
CRON(8) FreeBSD System Manager's Manual
NAME
cron -- daemon to execute scheduled commands (Vixie Cron)
SYNOPSIS
cron [-s] [-o] [-x debugflag[,...]]
DI> И что эта опция делает?
Available options:
-s Enable special handling of situations when the GMT offset of the
local timezone changes, such as the switches between the standard
time and daylight saving time.
The jobs run during the GMT offset changes time as intuitively
expected. If a job falls into a time interval that disappears
(for example, during the switch from standard time) to daylight
saving time or is duplicated (for example, during the reverse
switch), then it's handled in one of two ways:
The first case is for the jobs that run every at hour of a time
interval overlapping with the disappearing or duplicated inter-
val. In other words, if the job had run within one hour before
the GMT offset change (and cron was not restarted nor the
crontab(5) changed after that) or would run after the change at
the next hour. They work as always, skip the skipped time or run
in the added time as usual.
The second case is for the jobs that run less frequently. They
are executed exactly once, they are not skipped nor executed
twice (unless cron is restarted or the user's crontab(5) is
changed during such a time interval). If an interval disappears
due to the GMT offset change, such jobs are executed at the same
absolute point of time as they would be in the old time zone.
For example, if exactly one hour disappears, this point would be
during the next hour at the first minute that is specified for
them in crontab(5).
-o Disable the special handling of situations when the GMT offset of
the local timezone changes, to be compatible with the old
(default) behavior. If both options -o and -s are specified, the
option specified last wins.
Eugene
--- slrn/0.9.7.4 (FreeBSD)
* Origin: Svyaz Service JSC (2:5006/1@fidonet)
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