Date: Mon, 17 Sep 2001 13:07:59 +1000 From: Greg Black <gjb@gbch.net> To: Eugene Grosbein <eugen@www.svzserv.kemerovo.su> Cc: Tim Allshorn <ta_iy@hotmail.com>, freebsd-hackers@freebsd.org Subject: Re: Cron pickle Message-ID: <nospam-1000696079.92927@mx1.gbch.net> In-Reply-To: <20010917105932.A5338@svzserv.kemerovo.su> of Mon, 17 Sep 2001 10:59:32 %2B0800 References: <F243F4r4rPKlNonsYKU00010632@hotmail.com> <nospam-1000693050.89979@mx1.gbch.net> <20010917105932.A5338@svzserv.kemerovo.su>
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Eugene Grosbein wrote: | On Mon, Sep 17, 2001 at 12:17:30PM +1000, Greg Black wrote: | | > | I need to be able to run a particular program at the last | > | minute of each month and yes I know it would be much easier to | > | run it at the first minute of each month, but my hands are tied | > | and my brain is too puny to work it out. | > | > This cannot be done with cron, even with multiple entries. You | > can use cron to schedule something for minute zero of each month | > and that should be good enough for any reasonable use. | | This can be done with cron with single entry and small overhead. | Run whis script at last minute of every day (or every 28-31): | | #!/bin/sh | | tomorrow=`date -v+1d %d` | if [ $tomorroq -ne "01" ]; then | exit # if tomorrow is not begin of month, do nothing | fi | | # do work now Sure: $ date -v+1d %d date: illegal time format usage: date [-nu] [-d dst] [-r seconds] [-t west] [-v[+|-]val[ymwdHMS]] ... [-f fmt date | [[[[[cc]yy]mm]dd]HH]MM[.ss]] [+format] $ date '-v+1d %d' +1d %d: Cannot apply date adjustment usage: date [-nu] [-d dst] [-r seconds] [-t west] [-v[+|-]val[ymwdHMS]] ... [-f fmt date | [[[[[cc]yy]mm]dd]HH]MM[.ss]] [+format] Assuming you actually figure out how to get this thing right, it makes my point -- you can't do this with a cron specification, but you have to do the decision-making in the program. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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