Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Condition to check whether configuration file is empty or not?
Top Forums Shell Programming and Scripting Condition to check whether configuration file is empty or not? Post 302584725 by ahamed101 on Sunday 25th of December 2011 01:22:57 AM
Old 12-25-2011
To check if the file is empty
Code:
if [ -s "$i" ]
then
  echo "File is not empty"
else
  echo "File is empty"
fi

More Info

HTH
--ahamed

---------- Post updated at 10:22 PM ---------- Previous update was at 10:19 PM ----------

But then, CMD will have the file name and when you do a cat in the for loop, "i" will have contents of the file.

Or may be you want to check this...
Code:
if [ -s "$CMD" ]
then
  echo "File is not empty"
else
  echo "File is empty"
fi

--ahamed
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

How to check for empty file in Perl?

Hi, May I know how to check for empty file in Perl. Iam missing something, somewhere. #!/usr/bin/perl my $open_dir = '/path/'; my $file; my $ma = "abc_.*.\.psv\$" opendir(VAR, $open_dir) or die "Can't open $oepn_dir: $!\n"; while( defined ($file = readdir VAR) ) #read all... (1 Reply)
Discussion started by: deepakwins
1 Replies

2. UNIX for Dummies Questions & Answers

How to check if a file is empty?

Hi Masters..... I have problem !!! I need to check number of records in a file and if it is zero or file is empty i need to do some task. if ; then echo "File s empty" else echo "Not empty" fi so how to check this condition. I used wc -l < filename.txt => 1 for zero records same result... (1 Reply)
Discussion started by: shreekrishnagd
1 Replies

3. UNIX for Dummies Questions & Answers

to check if file is empty or not and return a non zero value

Hi All, I am new to unix worldd . I need to check a file1 if its empty or not. If its empty then return a non zero value say 99 could you pls let me know the perl script for this. (2 Replies)
Discussion started by: mavesum
2 Replies

4. Shell Programming and Scripting

check if file is empty

How do I check if a file is empty in a sh script I want to test in my shell script if the output file is empty and if it is do one thing and if it isnt empty do another? any ideas? (8 Replies)
Discussion started by: stolz
8 Replies

5. Shell Programming and Scripting

Need to check for empty file in C shell script

I am running a C shell script. I have an output file from a previous step and I need to run "something" in the next step to check if the file is empty. If the file is empty, then the job script should finish EOJ. If the file is not empty then the job script should abend. Please help Thanks. (4 Replies)
Discussion started by: jclanc8
4 Replies

6. Shell Programming and Scripting

Check if a text file is empty or not (using ls -s)

Hello, I want to make a script which says if a text file is empty or not. I tried two ways of making it, but I have problems with both of them. Now I think that the better way is the ls -s solution (considering that an empty text file has a 0 weight, because "cat file.txt" fails when file is... (4 Replies)
Discussion started by: Link_
4 Replies

7. UNIX for Dummies Questions & Answers

Check if file is empty with variables, bash

Hello again! I have some trouble with scripting in bash. In the following script I read from a folder with the files line0_Ux.xy line1_Ux.xy line2_Ux.xy . . . Some of the files are empty. For those I would like to print a "0" in list. I think the problem with the code is that... (4 Replies)
Discussion started by: bjoern456
4 Replies

8. Shell Programming and Scripting

Empty file check

Hi gurus , I have two files and i want to perform different action based on the condition if both or either is empty If then Do something elif then do something elif then do something else do something fi I have tried the below bt its not... (4 Replies)
Discussion started by: r_t_1601
4 Replies

9. Shell Programming and Scripting

How to check if the file is empty or has blank space.?

Hi, I am using KSH. I am trying to check if the output file is empty or not. I tried with ] but what i see is my file is empty but still manages to have a size of 1 instead of 0. But my file doesnot have anything its empty. I am not sure how to check this. can any one help? (10 Replies)
Discussion started by: Sharma331
10 Replies

10. Shell Programming and Scripting

To check whether the file is empty or not in shell script (sh)

Hi All, I need to check a file whether it exists and also whether it is empty or not. I have a code for this but it is not working as per my requirement. Can anyone pls suggest me on this. function funcFLSanityCheck { if then echo "${varFLSentFileListPath}/${varFLSentFileName}... (7 Replies)
Discussion started by: Arun1992
7 Replies

LEARN ABOUT DEBIAN

empty-page

EMPTY-PAGE(1)							 ExactImage Manual						     EMPTY-PAGE(1)

NAME

       empty-page - empty page detector of the ExactImage toolkit

SYNOPSIS

       empty-page [option...] {-i | --input} input-file

       empty-page {-h | --help}

DESCRIPTION

       ExactImage is a fast C++ image processing library. Unlike many other library frameworks it allows operation in several color spaces and bit
       depths natively, resulting in low memory and computational requirements.

       empty-page counts dark pixels of a black and white image and decides with a threshold whether the page is most probably empty, and thus can
       be removed from the image processing stream.

OPTIONS

       -i file, --input file
	   Read image from the specified file.

       -m n, --margin n
	   Set width of border margin to skip. For speed reasons, the margin has to be a multiple of 8. The default is 16.

       -p x, --percentage x
	   Set fraction of permissible dark pixels. The default is 0.05 (5%).

       -h, --help
	   Display help text and exit.

EXAMPLES

	   $ empty-page -i test.tif
	   The image has 75461 dark pixels from a total of 1060992 (7.11231%).
	   non-empty

EXIT STATUS

       The exit status is 0 if the image is mostly white, 1 otherwise.

SEE ALSO

       exactimage(7)

AUTHORS

       Jakub Wilk <jwilk@debian.org>
	   Wrote this manual page for the Debian system.

       http://www.exactcode.de/site/open_source/exactimage/
	   This manual page incorporates texts found on the ExactImage homepage.

COPYRIGHT

       This manual page was written for the Debian system (and may be used by others).

       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 or (at
       your option) any later version published by the Free Software Foundation.

       On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL-2.

empty-page							    09/09/2013							     EMPTY-PAGE(1)
All times are GMT -4. The time now is 09:16 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy