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Full Discussion: Multi pattern selection
Top Forums Shell Programming and Scripting Multi pattern selection Post 303000475 by drl on Wednesday 12th of July 2017 05:16:17 PM
Old 07-12-2017
Hi.

Using standard commands, and the very small sample data set; the operative commands here are:
Code:
grep -E 'SName|ESys' $FILE |
paste - -

In this script and output:
Code:
#!/usr/bin/env bash

# @(#) s1       Demonstrate matching, joining.

# 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 grep paste pass-fail

FILE=${1-data1}
E=expected-output.txt

pl " Input data file $FILE:"
cat $FILE

pl " Expected output:"
cat $E

pl " Results:"
grep -E 'SName|ESys' $FILE |
paste - - | tee f1

pl " Verify results if possible:"
C=$HOME/bin/pass-fail
[ -f $C ] && $C || ( pe; pe " Results cannot be verified." ) >&2

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 8.8 (jessie) 
bash GNU bash 4.3.30
grep (GNU grep) 2.20
paste (GNU coreutils) 8.23
pass-fail (local) 1.9

-----
 Input data file data1:
SName=abc123
ESys=xyz456
Host=xxx
Port=yyy

-----
 Expected output:
SName=abc123  ESys=xyz456

-----
 Results:
SName=abc123    ESys=xyz456

-----
 Verify results if possible:

-----
 Comparison of 1 created lines with 1 lines of desired results:
f1 expected-output.txt differ: char 13, line 1
 Failed -- files f1 and expected-output.txt not identical -- detailed comparison follows.
 Succeeded by ignoring whitespace differences.

Best wishes ... cheers, drl
 

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LEARN ABOUT DEBIAN

paste

PASTE(1)							   User Commands							  PASTE(1)

NAME

       paste - merge lines of files

SYNOPSIS

       paste [OPTION]... [FILE]...

DESCRIPTION

       Write  lines  consisting  of  the sequentially corresponding lines from each FILE, separated by TABs, to standard output.  With no FILE, or
       when FILE is -, read standard input.

       Mandatory arguments to long options are mandatory for short options too.

       -d, --delimiters=LIST
	      reuse characters from LIST instead of TABs

       -s, --serial
	      paste one file at a time instead of in parallel

       --help display this help and exit

       --version
	      output version information and exit

AUTHOR

       Written by David M. Ihnat and David MacKenzie.

REPORTING BUGS

       Report paste bugs to bug-coreutils@gnu.org
       GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
       General help using GNU software: <http://www.gnu.org/gethelp/>
       Report paste translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright (C) 2011 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The full documentation for paste is maintained as a Texinfo manual.  If the info and paste programs are properly installed  at  your  site,
       the command

	      info coreutils 'paste invocation'

       should give you access to the complete manual.

GNU coreutils 8.12.197-032bb					  September 2011							  PASTE(1)
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