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Full Discussion: If File has been updated, do something??
Top Forums Shell Programming and Scripting If File has been updated, do something?? Post 302255491 by cbo0485 on Thursday 6th of November 2008 01:56:48 PM
Old 11-06-2008
If File has been updated, do something??
Put this together from somewhere else on the forums, just modified it and added the loop.


Code:
#!/bin/ksh

localFile=$1
remoteFile=$2

#source FTP parameters
. .ftp_put.cfg

mylog=ftp_session.log
echo "$(date "+%H:%M:%S") - Attempt to FTP $1 to $2" > $mylog
machine="server1 server2 server3 server4"
count=0
# do the FTP put

for machine in $machine
do
ftp -i -n <<EOF >> $mylog
open $machine
user $FTP_LOGIN $FTP_PASSWORD
put $localFile $remoteFile
ls $remoteFile
quit
EOF
count=`expr $count + 1`
done

This script gets called by another script through a cron job every 5 minutes:

Code:
/tmp/abcQATest/abcMoveTest.sh archive.tar /tmp/archive.tar

Anyways, I was wondering if there was any way of making it a little better. Currently this simply ftp's that static file every 5 minutes, regardless of if the file has been updated or not. The way it works now is if someone needs to make an update to the 4 server's that this script FTP's to, they simply drop their archive file(named archive.tar) to the /tmp/abcQATest/ directory, and then within 5 minutes the crontab runs and ftp's their file to server 1-4 at the /tmp/archive.tar location.

Is there any way to set this up so it only ftp's the file if it's been updated since the last time the ftp ran? That way, if it gets updated, it get's FTP'd once, but then it doesn't get FTP'd again unless the file's been changed?

Then on the other 4 servers, I also need something like this:

Code:
If /tmp/archive.tar has been updated

do something
.
.
else
endif

The do something part is just a couple quick moves, extracts and deletes, that's no big deal. It's If statement I am stumped on.
 

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LEARN ABOUT LINUX

ftpconfig

ftpconfig(1M)                                             System Administration Commands                                             ftpconfig(1M)

NAME

       ftpconfig - set up anonymous FTP

SYNOPSIS

       ftpconfig [ftpdir]

       ftpconfig -d ftpdir

DESCRIPTION

       The ftpconfig script is executed by the super user to set up anonymous FTP. Anonymous FTP allows users to remotely log on to the FTP server
       by specifying the user name  ftp or anonymous and the user's email  address as password. The anonymous users  are  logged  on  to  the  FTP
       Server  and  given  access to a restricted file area with its own file system root. See chroot(2). The FTP area has  its own minimal system
       files.

       This command will copy and set up all the components needed to operate an anonymous FTP server, including creating the  ftp  user  account,
       creating  device  nodes,  copying  /usr/lib files, and copying timezone data.  The passwd and group files set up have been stripped down to
       prevent malicious users from finding login names on the server.  The anonymous file area will be placed  under  ftpdir.  If  the  ftp  user
       account already exists, then the current FTP area is used, and the system files in it are updated. All other files are left untouched. This
       command should be run to update the anonymous FTP area's configuration whenever a system patch is installed, or the system is upgraded.

OPTIONS

       -d       Create a new or update an existing ftpdir without creating or updating the ftp user account. Use this option when  creating  guest
                FTP user accounts.

OPERANDS

       The following operands are supported:

       ftpdir   The absolute pathname of the directory under which the anonymous FTP area is set up.

EXIT STATUS

       The following exit values are returned:

       0        Successful completion

       1        Improper usage of the command

       2        Command failed

ATTRIBUTES

       See attributes(5)  for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWftpu                     |
       +-----------------------------+-----------------------------+
       |Interface Stability          |Evolving                     |
       +-----------------------------+-----------------------------+

SEE ALSO

       ftpaddhost(1M), in.ftpd(1M), useradd(1M), chroot(2), attributes(5)

SunOS 5.10                                                          1 May 2003                                                       ftpconfig(1M)
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