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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 REDHAT

tiffcmp

TIFFCMP(1)						      General Commands Manual							TIFFCMP(1)

NAME

       tiffcmp - compare two TIFF files

SYNOPSIS

       tiffcmp [ options ] file1.tif file2.tif

DESCRIPTION

       Tiffcmp compares the tags and data in two files created according to the Tagged Image File Format, Revision 6.0.  The schemes used for com-
       pressing data in each file are immaterial when data are compared-data are compared on a	scanline-by-scanline  basis  after  decompression.
       Most  directory	tags are checked; notable exceptions are: GrayResponseCurve, ColorResponseCurve, and ColorMap tags.  Data will not be com-
       pared if any of the BitsPerSample, SamplesPerPixel, or ImageWidth values are not equal.	By default, tiffcmp will terminate if  it  encoun-
       ters any difference.

OPTIONS

       -l     List each byte of image data that differs between the files.

       -t     Ignore any differences in directory tags.

BUGS

       Tags that are not recognized by the library are not compared; they may also generate spurious diagnostics.

       The image data of tiled files is not compared, since the TIFFReadScanline() function is used.  A error will be reported for tiled files.

       The pixel and/or sample number reported in differences may be off in some exotic cases.

SEE ALSO

       pal2rgb(1), tiffinfo(1), tiffcp(1), tiffmedian(1), libtiff(3)

								September 26, 1994							TIFFCMP(1)
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