Sponsored Content
Full Discussion: sed one Liner option -e
Top Forums Shell Programming and Scripting sed one Liner option -e Post 302942286 by TomG on Monday 27th of April 2015 06:53:58 AM
Old 04-27-2015
Quote:
Originally Posted by RudiC
That one liner actually does what it is said to do. The -es are not needed (at least in my linux mawk). Try printing the pattern space with the l command to see how it proceeds. If it finds only zero or more <NL> (\n) chars in the pattern space which is one or more empty lines, it apends the next line. If that is empty as well, repeat. If it's the last line, quit. Any other line, print the ensemble:
Code:
sed 'l; :a /^\n*$/{$d;N;l;ba}' file
foo$
foo
$
\n$
\n\nbar$


bar
baz$
baz
$
\n$
\n\n$
\n\n\n$
\n\n\n\n$


I understood the logic..its was a great debugging tip to get the content of Pattern space. That was a new learning for me . But for some reason this command was not working in HP-UX without -e

Thank you..
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Awk/Sed One liner for text replacement

Hi group, I want to replace the occurance of a particular text in a paragraph.I tried with Sed,but Sed only displays the result on the screen.How can i update the changes in the original file??? The solution should be a one liner using awk and sed. Thanks in advance. (5 Replies)
Discussion started by: bishnu.bhatta
5 Replies

2. Shell Programming and Scripting

Issue with a sed one liner variant - sed 's/ ; /|/g' $TMP1 > $TMP

Execution of the following segment is giving the error - Script extract:- OUT=$DATADIR/sol_rsult_orphn.bcp TMP1=${OUT}_tmp1 TMP=${OUT}_tmp ( isql -w 400 $dbConnect_OPR <<EOF select convert(char(10), s.lead_id) +'|' + s.pho_loc_type, ";", s.sol_rsult_cmnt, ";", +'|'+ s.del_ind... (3 Replies)
Discussion started by: kzmatam
3 Replies

3. Shell Programming and Scripting

Sed one-liner to print specific lines?

I need to print specific lines from a file, say 2-5, 8, 12-15, 17, 19, 21-27. How do I achieve this? (2 Replies)
Discussion started by: Ilja
2 Replies

4. Shell Programming and Scripting

Clarification needed for a SED one liner

I want to use SED to replace all new line characters of a file, I googled and found this one liner sed '{:q;N;s/\n//g;t q}' infile what do :q;N; and t q mean in this script? (6 Replies)
Discussion started by: kevintse
6 Replies

5. Shell Programming and Scripting

SED | Awk flat file one liner

sed awk one liner (2 Replies)
Discussion started by: jap2614
2 Replies

6. Shell Programming and Scripting

help with sed one liner

hey everyone, I want to remove some characters from a string that i have with sed. For example if my string is: a0=bus a1=car a2=truck I want my output to look like this: bus car truck So i want to delete the two characters before the = and including the =. This is what i came up with... (3 Replies)
Discussion started by: GmGeubt
3 Replies

7. UNIX for Advanced & Expert Users

Please explain this sed one liner

Can anyone explain the below sed oneliner? sed -e ':a' -e '$q;N;11,$D;ba' It works same as tail command. I just want to know how it works. Thanks ---------- Post updated at 11:42 PM ---------- Previous update was at 11:37 PM ---------- Moderators, Can you please delete this thread?... (0 Replies)
Discussion started by: pandeesh
0 Replies

8. UNIX for Advanced & Expert Users

sed one liner simialr to tail command

Can anyone explain the below sed oneliner? sed -e ':a' -e '$q;N;11,$D;ba' It works same as tail command. I just want to know how it works. Thanks (1 Reply)
Discussion started by: pandeesh
1 Replies

9. UNIX for Dummies Questions & Answers

sed one-liner

I have a data base of part numbers: AAA Thing1 BBB Thing2 CCC Thing3 File one is a list of part numbers: AAA234 BBB678 CCC2345 Is there a sed one-line that would compare a data base with and replace the part numbers so that the output looks like this? AAA234 Thing1 BBB678 Thing2... (5 Replies)
Discussion started by: jimmyf
5 Replies

10. UNIX for Dummies Questions & Answers

awk or sed one liner

I have a data base of part numbers: AAA Thing1 BBB Thing2 CCC Thing3 File one is a list of part numbers: XXXX AAA234 XXXX BBB678 XXXX CCC2345 Is there a sed one-line that would compare a data base with and replace the part numbers so that the output looks like this? XXXX AAA234... (7 Replies)
Discussion started by: jimmyf
7 Replies
SHTOOL-SUBST.TMP(1)					      GNU Portable Shell Tool					       SHTOOL-SUBST.TMP(1)

NAME
shtool-subst - GNU shtool sed(1) substitution operations SYNOPSIS
shtool subst [-v|--verbose] [-t|--trace] [-n|--nop] [-w|--warning] [-q|--quiet] [-s|--stealth] [-i|--interactive] [-b|--backup ext] [-e|--exec cmd] [-f|--file cmd-file] [file] [file ...] DESCRIPTION
This command applies one or more sed(1) substitution operations to stdin or any number of files. OPTIONS
The following command line options are available. -v, --verbose Display some processing information. -t, --trace Enable the output of the essential shell commands which are executed. -n, --nop No operation mode. Actual execution of the essential shell commands which would be executed is suppressed. -w, --warning Show warning on substitution operation resulting in no content change on every file. The default is to show a warning on substitution operations resulted in no content change on all files. -q, --quiet Suppress warning on substitution operation resulting in no content change. -s, --stealth Stealth operation. Preserve timestamp on file. -i, --interactive Enter interactive mode where the user has to approve each operation. -b, --backup ext Preserve backup of original file using file name extension ext. Default is to overwrite the original file. -e, --exec cmd Specify sed(1) command directly. -f, --file cmd-file Read sed(1) command from file. EXAMPLE
# shell script shtool subst -i -e 's;(c) ([0-9]*)-2000;(c) 1-2001;' *.[ch] # RPM spec-file %install shtool subst -v -n -e 's;^(prefix=).*;1 $RPM_BUILD_ROOT%{_prefix};g' -e 's;^(sysconfdir=).*;1 $RPM_BUILD_ROOT%{_prefix}/etc;g' `find . -name Makefile -print` make install HISTORY
The GNU shtool subst command was originally written by Ralf S. Engelschall <rse@engelschall.com> in 2001 for GNU shtool. It was prompted by the need to have a uniform and convenient patching frontend to sed(1) operations in the OpenPKG package specifications. SEE ALSO
shtool(1), sed(1). 18-Jul-2008 shtool 2.0.8 SHTOOL-SUBST.TMP(1)
All times are GMT -4. The time now is 02:16 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy