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Full Discussion: Help comparing 2 files and sending differences
Top Forums Shell Programming and Scripting Help comparing 2 files and sending differences Post 302753727 by jabbott3 on Wednesday 9th of January 2013 09:25:32 AM
Old 01-09-2013
Help comparing 2 files and sending differences
I have 2 files that need to be compared. Email the differences if something is different and don't email if nothing is different. One or both of the files could be empty. One or both could have data in them.

example files
backup.doc.$(date +%y%m%d) file size is 0
backup.doc.$(TZ=CST+24 date +%y%m%d) file size is 412

or vice versa

Any help would be appreciated. I've tried the following but it seems to ignore if there is nothing in the file.

Code:
awk 'NR==FNR{a[$0]++;next} !($0 in a) {print $0}' backup.doc.$(date +%y%m%d)  backup.doc.$(TZ=CST+24 date +%y%m%d) > /tmp/failed
[ -s /tmp/failed ]  && cat /tmp/failed | mailx -s "Backup Failed" user@email.com

 

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LEARN ABOUT DEBIAN

gifdiff

GIFDIFF(1)						      General Commands Manual							GIFDIFF(1)

NAME

       gifdiff - compares GIF images

SYNOPSIS

       gifdiff [options] GIF-file-1 GIF-file-2

DESCRIPTION

       gifdiff compares two GIF files and determines if they appear identical. Differences that don't affect appearance (like colormap ordering or
       how much an animation is optimized) are not reported.

       gifdiff prints details of any differences it finds. If the GIFs are the same, it prints nothing. It exits with status 0 if  there  were	no
       differences, 1 if there were some differences, and 2 if there was trouble.

OPTIONS

       --brief, -q
	    Report only whether the GIFs differ, not the details of the differences.

       --ignore-redundancy, -w
	    Do not report differences in the numbers of redundant frames (frames which do not change the displayed image).

       --help
	    Print usage information and exit.

       --version
	    Print the version number and some quickie warranty information and exit.

SEE ALSO

       gifsicle(1)

BUGS

       Please email suggestions, additions, patches and bugs to ekohler@gmail.com.

AUTHORS

       Eddie Kohler, ekohler@gmail.com
       http://www.read.seas.harvard.edu/~kohler/

       http://www.lcdf.org/gifsicle/
       The gifsicle home page.

Version 1.67							  31 August 1998							GIFDIFF(1)
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