Date: Sun, 6 Feb 2011 23:16:10 +0100 From: J65nko <j65nko@gmail.com> To: kellyremo <kellyremo@zoho.com> Cc: FreeBSD <freebsd-questions@freebsd.org> Subject: Re: if the file changes send email about diff Message-ID: <AANLkTikED8gPyojVFaHUuMgRpZJ3yYzv__PszTr9ZwHJ@mail.gmail.com> In-Reply-To: <12dfb2d663e.8735497800158401667.-7202521450009428314@zoho.com> References: <12dfb2d663e.8735497800158401667.-7202521450009428314@zoho.com>
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On Sun, Feb 6, 2011 at 2:33 PM, kellyremo <kellyremo@zoho.com> wrote: > > I have 2 script. Script "A", Script "B". > > Script "A" is regulary watching the "dhcpacks" [dhcp release is configure= d to 2mins] in the logs, for the past 2 minutes. it writes the MAC addresse= s to a file [/dev/shm/dhcpacks-in-last-2min.txt] every 2 minutes. Ok, this = is working, active clients are in this file. Super! > > Script "B": http://pastebin.com/raw.php?i=3DwvhwhPWu > I'm trying to create a script, that watches the changes in "/dev/shm/dhcp= acks-in-last-2min.txt" file [in every 1 sec]. Ok. But: my "watcher" script = [the pastebined] is not working fine...sometime it works, sometime it send = that someone "XY logged out", but it's not true! nothing happened, and the = problem is not in the Script "A". > > Can someone help me point out, what am i missing? How can i watch a file = [in every sec], that contains only MAC addresses, and if someone doesn't ge= t dhcpack in 2 minutes, the file "/dev/shm/dhcpacks-in-last-2min.txt" chang= es, and that clients MAC address will be gone from it, and i need to know, = who was it [pastebined my script..but somethings wrong with it]. You are attempting to re-invent the wheel called "revision control system" ;) Your FreeBSD box has a simple revision control system called 'rcs'. It will do the most things you are trying to emulate in your shell script. Read the rcsintro(1) man page how to get started.
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