Date: Sat, 6 Oct 2001 21:57:03 +0200 From: Rogier Steehouder <r.j.s@gmx.net> To: cyu0635@home.com Cc: "freebsd-questions@FreeBSD.ORG" <freebsd-questions@FreeBSD.ORG> Subject: Re: [FBSD-Q] script question Message-ID: <20011006215703.A468@localhost> In-Reply-To: <3BBF1F7D.3218276B@home.com>; from cyu0635@home.com on Sat, Oct 06, 2001 at 11:13:02AM -0400 References: <3BBF1F7D.3218276B@home.com>
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On 06-10-2001 11:13 (-0400), cyu0635@home.com wrote:
> Hi all
>
> I use the following script to mail to log file
> but sometimes I got the workings 'Null message, hope that ok' after
> running the script
>
> Why?
> and what is wrong?
>
> TIA
>
> #! /bin/bash
> /bin/cat /var/log/messages > /tmp/tmp_logs
> /bin/cat /var/log/secure >> /tmp/tmp_logs
> /bin/cat /tmp/tmp_logs | grep "$(date +"%b %d" | sed 's/ 0/ /g')" | sort
> -o /tmp
> /yesterday_log +2
> /bin/cat /tmp/yesterday_log | mail -s "Yesterday's Logged Events"
> peter@localhos
> t
Suppose your logs rotated this morning, then tmp_logs will not contain
any entries for yesterday, so yesterday_log will be empty and you're
sending an empty mail message. You could adapt this script to include
the latest backup log in tmp_logs using zcat, but even then it would not
be completely full proof (what if yesterdays log entries span several
backups?).
With kind regards, Rogier Steehouder
--
___ _
-O_\ //
| / Rogier Steehouder //\
/ \ r.j.s@gmx.net // \
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