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Full Discussion: Script check for file, alert if not there, and continue checking until file arrives
Top Forums Shell Programming and Scripting Script check for file, alert if not there, and continue checking until file arrives Post 302454988 by 116@434 on Monday 20th of September 2010 01:13:00 PM
Old 09-20-2010
To check for file in a loop you can do this:

Code:
until [ -f "myfilename" ]
do
sleep 30 ##set it so that does not add load on your system
done

Rest logic you can add I guess.
This User Gave Thanks to 116@434 For This Post:
markdjones82
 

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LEARN ABOUT CENTOS

biff

BIFF(1)                                                     BSD General Commands Manual                                                    BIFF(1)

NAME

     biff -- be notified if mail arrives and who it is from

SYNOPSIS

     biff [ny]

DESCRIPTION

     Biff informs the system whether you want to be notified when mail arrives during the current terminal session.

     Options supported by biff:

     n     Disables notification.

     y     Enables notification.

     When mail notification is enabled, the header and first few lines of the message will be printed on your screen whenever mail arrives.  A
     ``biff y'' command is often included in the file .login or .profile to be executed at each login.

     Biff operates asynchronously via the comsat(8) service. If that service is not enabled, biff will not do anything. In that case, or for syn-
     chronous notification, use the MAIL variable of sh(1) or the mail variable of csh(1).

SEE ALSO

     csh(1), mail(1), sh(1), comsat(8)

HISTORY

     The biff command appeared in 4.0BSD.

BUGS

     su(1), and biff don't seem to get on too well. This is probably due to the tty still being owned by the person using su. This can result in
     ``Permission denied'' messages when attempting to change the biff status of your session.

     Please report bugs to netbug@ftp.uk.linux.org including diffs/patches, compiler error logs or as complete a bug report as is possible.

Linux NetKit (0.17-pre-20000412)                                   July 31, 1999                                  Linux NetKit (0.17-pre-20000412)
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