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Top Forums Shell Programming and Scripting Compare 2 files using sdiff command output Post 302864491 by gacanepa on Wednesday 16th of October 2013 03:03:14 PM
Old 10-16-2013
Optimus81:
Please see this link on how to add colors to output of shell scripts.
Aravindhan_D:
First, ksh is not a command per se, but a shell.
Second, this code snippet should at least get you started:
Code:
cat /dev/null > diff.txt
while read line_from_a; do
	while read line_from_b; do
		if [ "$line_from_a" != "$line_from_b" ]; then
			echo $line_from_a >> diff txt
		fi
	done < b.txt
done < a.txt

Please note that the code above makes the following assumptions:
1) The number of lines in a.txt is greater than the number of lines in b.txt.
2) To produced your desired output, all the lines in b.txt must appear in a.txt, so that only the lines that are in a.txt but not in b.txt will be redirected to diff.txt.
Hope it helps.
 

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ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

NAME
atf-sh [-s shell] -- interpreter for shell-based test programs SYNOPSIS
atf-sh script DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library. atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter- preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not use any non-standard extensions. The following options are available: -s shell Specifies the shell to use instead of the value provided by ATF_SHELL. ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes. ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes. ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a specific interpreter. EXAMPLES
Scripts using atf-sh(3) should start with: #! /usr/bin/env atf-sh Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode the path to atf-sh in the script and then use the -s option afterwards as a single parameter: #! /path/to/bin/atf-sh -s/bin/bash ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts. SEE ALSO
atf-sh(3) BSD
September 27, 2014 BSD
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