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Top Forums UNIX for Advanced & Expert Users Comparing two files and writing mismatched rows along with mismatched columns. Pointing out the mism Post 302997144 by drl on Monday 8th of May 2017 01:29:03 PM
Old 05-08-2017
HI.

Using your sample data, here is a solution using a GNU utility, dwdiff. Basically, it operates on space-separated words, so I modified your sample files to be that instead of | separated:
Code:
#!/usr/bin/env bash

# @(#) s1       Demonstrate field/word diff, dwdiff.

# Utility functions: print-as-echo, print-line-with-visual-space, debug.
# export PATH="/usr/local/bin:/usr/bin:/bin"
LC_ALL=C ; LANG=C ; export LC_ALL LANG
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
em() { pe "$*" >&2 ; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C dwdiff

FILE=${1-data1}

pl " Input data files:"
head data?

pl " Amended data files::"
sed 's/|/ /g' data1 > t1
sed 's/|/ /g' data2 > t2
head t?

pl " Results:"
dwdiff t1 t2

pl " More details for dwdiff:"
dixf dwdiff

exit 0

producing:
Code:
$ ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 3.16.0-4-amd64, x86_64
Distribution        : Debian 8.7 (jessie) 
bash GNU bash 4.3.30
dwdiff 2.0.9

-----
 Input data files:
==> data1 <==
1|piyush|bangalore|dev 
1|piyush|bangalore|QA 
2|pankaj|bangalore|dev 
3|rohit|delhi|QA

==> data2 <==
1|piyush|bangalore|QA 
1|piyush|bangalore|QA 
2|pankaj|bangalore|dev 
3|rohit|bangalore|dev

-----
 Amended data files::
==> t1 <==
1 piyush bangalore dev 
1 piyush bangalore QA 
2 pankaj bangalore dev 
3 rohit delhi QA

==> t2 <==
1 piyush bangalore QA 
1 piyush bangalore QA 
2 pankaj bangalore dev 
3 rohit bangalore dev

-----
 Results:
1 piyush bangalore [-dev-] {+QA+} 
1 piyush bangalore QA 
2 pankaj bangalore dev 
3 rohit [-delhi QA-] {+bangalore dev+}

-----
 More details for dwdiff:
dwdiff  a delimited word diff program (man)
Path    : /usr/bin/dwdiff
Version : 2.0.9
Type    : ELF 64-bit LSB executable, x86-64, version 1 (SYSV ...)
Help    : probably available with --help
Repo    : Debian 8.7 (jessie)

Note that the braces enclose the markers + for an addition, - for a deletion.

There are a number of additional options. See man dwdiff for details.

Best wishes ... cheers, drl
 

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getusershell(3C)					   Standard C Library Functions 					  getusershell(3C)

NAME
getusershell, setusershell, endusershell - get legal user shells SYNOPSIS
#include <unistd.h> char *getusershell(void); void setusershell(void); void endusershell(void); DESCRIPTION
The getusershell() function returns a pointer to a legal user shell as defined by the system manager in the file /etc/shells. If /etc/shells does not exist, the following locations of the standard system shells are used in its place: /bin/bash /bin/csh /bin/jsh /bin/ksh /bin/pfcsh /bin/pfksh /bin/pfsh /bin/sh /bin/tcsh /bin/zsh /sbin/jsh /sbin/pfsh /sbin/sh /usr/bin/bash /usr/bin/csh /usr/bin/jsh /usr/bin/ksh /usr/bin/pfcsh /usr/bin/pfksh /usr/bin/pfsh /usr/bin/sh /usr/bin/tcsh /usr/bin/zsh /usr/xpg4/bin/sh The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells. The setusershell() function rewinds the file or the list. The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells. RETURN VALUES
The getusershell() function returns a null pointer on EOF. BUGS
All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved. SunOS 5.10 30 Aug 2004 getusershell(3C)
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