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Full Discussion: File Comparision
Top Forums Shell Programming and Scripting File Comparision Post 302444545 by funksen on Thursday 12th of August 2010 05:46:47 AM
Old 08-12-2010
an example:

Code:
# cat file1
line1 a b c
line3 c d e
line2 q l r
# cat file2
line1 a b c
line2 q l r
line3 c d e
# cat file3
line3 c d e
line2  l r
line1 a b c

without sort

Code:
# diff file1 file2
2d1
< line3 c d e
3a3
> line3 c d e

echo $? # output return code
1


with sort:

Code:
#sort file1 > file1.sort
#sort file2 >file2.sort
#diff file1.sort file2.sort
#echo $?
0




to put this in a script:

Code:
#!/bin/ksh
sort ${1} > /tmp/${1}.sort
sort ${2} > /tmp/${2}.sort

diff /tmp/${1}.sort /tmp/${2}.sort >/dev/null 2>&1
if [ $? -eq 0 ] 
then echo "files are equal"  ; RC=0
else echo "files are not equal" ; RC=1
fi

rm /tmp/${1}.sort
rm /tmp/${2}.sort 

exit $RC

usage:

Code:
# ./compare.ksh file1 file3
files are not equal
# ./compare.ksh file2 file1
files are equal

they way you sort the files doesn't matter, unless you sort both files the same way
 

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LEARN ABOUT OPENSOLARIS

bzcmp

BZDIFF(1)						      General Commands Manual							 BZDIFF(1)

NAME

       bzcmp, bzdiff - compare bzip2 compressed files

SYNOPSIS

       bzcmp [ cmp_options ] file1 [ file2 ]
       bzdiff [ diff_options ] file1 [ file2 ]

DESCRIPTION

       Bzcmp  and  bzdiff  are used to invoke the cmp or the diff program on bzip2 compressed files.  All options specified are passed directly to
       cmp or diff.  If only 1 file is specified, then the files compared are file1 and an uncompressed file1.bz2.  If two  files  are	specified,
       then they are uncompressed if necessary and fed to cmp or diff.	The exit status from cmp or diff is preserved.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +--------------------+-----------------+
       |  ATTRIBUTE TYPE    | ATTRIBUTE VALUE |
       +--------------------+-----------------+
       |Availability	    | SUNWbzip	      |
       +--------------------+-----------------+
       |Interface Stability | Committed       |
       +--------------------+-----------------+
SEE ALSO

       cmp(1), diff(1), bzmore(1), bzless(1), bzgrep(1), bzip2(1)

BUGS

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

																	 BZDIFF(1)
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