watching for a file Post: 302441141

Sponsored Content

Top Forums Shell Programming and Scripting watching for a file Post 302441141 by methyl on Thursday 29th of July 2010 10:53:33 AM

07-29-2010

Registered User

Lateral though way of letting the script flow after the file arrives.

Beware that the presence of a filename in a directory does not mean that the process writing the file has finished.
The process writing the file could write the file under a temporary name and then rename the file to its correct name at the end of the transfer.

Code:

filename="myfile"
for T in 5 5 5 5 5 5 X
do
        if [ "${T}" = "X" ]
        then
                echo "File ${filename} did not arrive"
                exit
        fi
        if [ -f "${filename}" ]
        then
                echo "File ${filename} arrived"
                break
        fi
        echo "File ${filename} yet to arrive. Waiting ${T} seconds"
        sleep ${T}
done
#
# Processing of ${filename} goes here

methyl

View Public Profile for methyl

Find all posts by methyl

5 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Actively watching for running processes

Here's a fun one... What's the best way to script looking for a process when it runs? For example, what if a process is running that's been set up graphically, which you would like the entire command line string for? Say it's rpm for the sake of having a command to use as an example. You want...

2. UNIX for Dummies Questions & Answers

sed remove expression from output I'm watching

I'm watching a particular expression as it is appended in a line to a file: tail -f LOG | sed -n /"$@"/p So whatever value I pass into this script will tail -f the file, but only show me lines that contain the value: lgwatch expression However some of the output contains a #20 control...

3. Shell Programming and Scripting

Match list of strings in File A and compare with File B, C and write to a output file in CSV format

Hi Friends, I'm a great fan of this forum... it has helped me tone my skills in shell scripting. I have a challenge here, which I'm sure you guys would help me in achieving... File A has a list of job ids and I need to compare this with the File B (*.log) and File C (extend *.log) and copy...

4. Shell Programming and Scripting

Compare 2 text file with 1 column in each file and write mismatch data to 3rd file

Hi, I need to compare 2 text files with around 60000 rows and 1 column. I need to compare these and write the mismatch data to 3rd file. File1 - file2 = file3 wc -l file1.txt 58112 wc -l file2.txt 55260 head -5 file1.txt 101214200123 101214700300 101250030067 101214100500...

5. Shell Programming and Scripting

Shell script (sh file) logic to compare contents of one file with another file and output to file

Shell script logic Hi I have 2 input files like with file 1 content as (file1) "BRGTEST-242" a.txt "BRGTEST-240" a.txt "BRGTEST-219" e.txt File 2 contents as fle(2) "BRGTEST-244" a.txt "BRGTEST-244" b.txt "BRGTEST-231" c.txt "BRGTEST-231" d.txt "BRGTEST-221" e.txt I want to get...

LEARN ABOUT DEBIAN

file::slurp::withinpolicy

File::Slurp::WithinPolicy(3pm)				User Contributed Perl Documentation			    File::Slurp::WithinPolicy(3pm)

NAME

       File::Slurp::WithinPolicy - Applies filesystem policies to File::Slurp

SYNOPSIS

	 use File::Slurp::WithinPolicy qw(:all);

	 my $text = read_file( 'filename' );
	 my @lines = read_file( 'filename' );
	 write_file( 'filename', $text );
	 append_file( 'filename', $more_text );
	 overwrite_file( 'filename', $text );
	 my @files = read_dir( '/path/to/dir' );

DESCRIPTION

       This provides the File::Slurp interface within a policy defined by File::Policy.  By default, File::Policy is a no-op and this behaves
       identically to File::Slurp.  System administrators may want to override the default File::Policy implementation to enforce a local filesys-
       tem policy (see File::Policy).

FUNCTIONS

       read_dir

       See "read_dir" in File::Slurp

       read_file

       See "read_file" in File::Slurp

       write_file

       See "write_file" in File::Slurp

       append_file

       See "append_file" in File::Slurp

       overwrite_file

       See "overwrite_file" in File::Slurp

EXPORTS

       By default, nothing is exported.  The ":all" tag can be used to export everything.  Individual methods can also be exported.

SEE ALSO

       File::Slurp, File::Policy

VERSION

       $Revision: 1.4 $ on $Date: 2005/06/15 10:40:21 $ by $Author: simonf $

AUTHOR

       John Alden <cpan _at_ bbc _dot_ co _dot_ uk>

COPYRIGHT

       (c) BBC 2005. This program is free software; you can redistribute it and/or modify it under the GNU GPL.

       See the file COPYING in this distribution, or http://www.gnu.org/licenses/gpl.txt

perl v5.8.8							    2005-06-15					    File::Slurp::WithinPolicy(3pm)