Date: Sat, 04 Nov 2000 02:21:11 -0600 (CST) From: Don Read <dread@texas.net> To: cjclark@alum.mit.edu Cc: freebsd-questions@FreeBSD.ORG, Steve Price <sprice@hiwaay.net> Subject: Re: 'crontab -e' woes Message-ID: <XFMail.001104022111.dread@texas.net> In-Reply-To: <20001101234720.J75251@149.211.6.64.reflexcom.com>
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On 02-Nov-00 Crist J . Clark wrote:
> On Wed, Nov 01, 2000 at 09:04:26PM -0600, Steve Price wrote:
>> Howdy all,
>>
>> Don't know if it is just a couple of days of absolutely no
>> sleep or what but I've been scratching my over head what
>> should be a simple problem.
>>
>> Basically what I'm trying to do is setup a non-interactive
>> script that edits my crontab. When I type the following
>> commands in it comments out the first entry. However, when
>> I run it by redirecting stdin from a file it doesn't work.
>> >From the looks of it (note the 37 -> 38 change) the file
>> is being updated but crontab is ignoring the change.
>>
>> steve@bsd(/tmp)$ crontab -l
>> # DO NOT EDIT THIS FILE - edit the master and reinstall.
>> # (/tmp/crontab.teFMi62568 installed on Wed Nov 1 20:47:27 2000)
>> # (Cron version -- $FreeBSD: src/usr.sbin/cron/crontab/crontab.c,v 1.12
>> # 1999/08/28 01:15:52 peter Exp $)
>> */1 * * * * /home/steve/bin/bogus.sh
>> steve@bsd(/tmp)$ cat cmds
>> 1s/^/#/
>> wq
>> steve@bsd(/tmp)$ env VISUAL=/bin/ed crontab -e < cmds
>> 37
>> 38
>> crontab: no changes made to crontab
>> steve@bsd(/tmp)$ cat cmds | env VISUAL=/bin/ed crontab -e
>> 37
>> 38
>> crontab: no changes made to crontab
>> steve@bsd(/tmp)$
>>
>> Can anyone tell what I'm doing wrong? Thanks.
>
> Don't ask me why, but try this,
>
> $ { echo '1s/^/#/'; echo w; } | env VISUAL=/bin/ed crontab -e
>
Why all the futzing around with ex/vi/ed ?
localhost.dread$ crontab -l | grep -v "^#"
46 3-23/3 * * * bin/getsignups > /dev/null
localhost.dread$ crontab -l | sed 's/^46 /16 /' | crontab -
localhost.dread$ crontab -l | grep -v "^#"
16 3-23/3 * * * bin/getsignups > /dev/null
Regards,
--
Don Read dread@texas.net
There are old sailors, and there are foolish
sailors; but damn few old foolish sailors.
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