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Full Discussion: Using 'diff' exit status in an if statement
Top Forums UNIX for Dummies Questions & Answers Using 'diff' exit status in an if statement Post 302493874 by pludi on Friday 4th of February 2011 03:43:48 AM
Old 02-04-2011
Long form:
Code:
diff file1.txt file2.txt >/dev/null 2>&1
if [ $? -eq 0 ]
then
    echo "Files are the same"
else
    echo "Files are different"
fi

Shorter:
Code:
if diff file1.txt file2.txt >/dev/null 2>&1
then
    echo "Files are the same"
else
    echo "Files are different"
fi

 

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LEARN ABOUT SUSE

lzcmp

XZDIFF(1)							     XZ Utils								 XZDIFF(1)

NAME

       xzcmp, xzdiff, lzcmp, lzdiff - compare compressed files

SYNOPSIS

       xzcmp [cmp_options] file1 [file2]
       xzdiff [diff_options] file1 [file2]
       lzcmp [cmp_options] file1 [file2]
       lzdiff [diff_options] file1 [file2]

DESCRIPTION

       xzcmp  and  xdiff invoke cmp(1) or diff(1) on files compressed with xz(1), lzma(1), gzip(1), or bzip2(1).  All options specified are passed
       directly to cmp or diff.  If only one file is specified, then the files compared are file1 (which must have a suffix of	a  supported  com-
       pression  format)  and  file1 from which the compression format suffix has been stripped.  If two files are specified, then they are uncom-
       pressed if necessary and fed to cmp(1) or diff(1).  The exit status from cmp or diff is preserved.

       The names lzcmp and lzdiff are provided for backward compatibility with LZMA Utils.

SEE ALSO

       cmp(1), diff(1), xz(1), gzip(1), bzip2(1), zdiff(1)

BUGS

       Messages from the cmp(1) or diff(1) programs refer to temporary filenames instead of those specified.

Tukaani 							    2009-07-05								 XZDIFF(1)
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