Sponsored Content
Top Forums Shell Programming and Scripting Grep number between Square [] brackets Post 302894915 by Don Cragun on Friday 28th of March 2014 12:26:22 AM
Old 03-28-2014
Quote:
Originally Posted by nes
1. I am trying to store this values in one variable like (temp = 84|589|60|5)
Because I have hundreds or thousands of lines and don't know how many enries are there. So I am planning to give seperator (|) to store values.

2. In both SunOS and Linux systeam

3. I am using
#!/bin/ksh

4. no tools directly in Linux and Sunos systeam

Thanks you Smilie
What are you going to do with this variable with hundreds of thousands of values separated by vertical bars in it once you get it? If you're going to process each value, you'd probably be much better off processing each value as you find it piped into a loop to process the values. Storing a set of values in a variable as a string that is about a quarter of a megabyte long and then processing that string doesn't seem like a good approach.

And, once more: What have you tried so far? If you refuse to answer this question, it will likely take a lot longer to get a resolution to your problem. We're here to help you learn how to use Linux and UNIX tools; not to write your code for you. And even more importantly, if you show us what you've done, we might get a much better idea of what you're trying to do!
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

square brackets

I would like to substitute a phrase which contains square brackets. change TO how? Thanks (2 Replies)
Discussion started by: gilead29
2 Replies

2. Shell Programming and Scripting

WHy the double square brackets?

One of the senior administrators gave me a shell script to modify and it begins as follows: if ] && ] {more code follows} Why the double square brackets? (10 Replies)
Discussion started by: mojoman
10 Replies

3. Shell Programming and Scripting

Use of double square brackets in ksh

Hi First apologies if this has been raised before. I've got the following in a ksh script: if ] For some reason this does not work. But if I remove the double square brackets to: if This works. I thought ksh supported the ]. Or is there more to it? Thanks in advance. (3 Replies)
Discussion started by: tsu3000
3 Replies

4. Shell Programming and Scripting

Double square brackets question

Hi, I just came across an interesting shell script syntax like the one below: ] && (trap 'rm -rf ${WORK_DIR}/*.$$; echo "\n\nInterrupted !!\n\n"; exit 4' 1 2 3 15) Can someone please explain the code snippet above? The trap command bit is fine but ] && is the hazy part. Generally we use an... (2 Replies)
Discussion started by: King Nothing
2 Replies

5. UNIX for Dummies Questions & Answers

Test command - Two square brackets

Hello, Can someone please explain to me the following line, ] && break I do not understand why two test square brackets are used. Thanks, Shantanu ---------- Post updated at 03:38 PM ---------- Previous update was at 03:35 PM ---------- And, also why there's a $ before (echo $c |... (5 Replies)
Discussion started by: Shan_u2005
5 Replies

6. Shell Programming and Scripting

Delete text between square brackets and also delete those square brackets using sed or awk

Hi All, I have a text file which looks like this: computer programming systems engineering I want to get rid of these square brackets and also the text that is inside these brackets. So that my final text file looks like this: computer programming systems engineering I am using... (3 Replies)
Discussion started by: shoaibjameel123
3 Replies

7. UNIX for Dummies Questions & Answers

Single or double square brackets

Hi frieds, I don't understand the difference between single square bracket and double square brackets in a IF condition. Ex. if ; then RETURNJOB=1 else RETURNJOB=0 fi It run, but this if ]; then RETURNJOB=1 else RETURNJOB=0 fi (4 Replies)
Discussion started by: dogshort
4 Replies

8. Shell Programming and Scripting

Compare the value in between square brackets in file

I wanted to compare the value inside the Squre bracket after Colon ( : ) based on any value(seperated by or operator | ) inside the variable Thread and if match found then wnated to store in output file Input file : 20140320 00:08:43.918 INO 35] - Corporate hub is 20140320 00:08:43.918... (2 Replies)
Discussion started by: nes
2 Replies

9. Shell Programming and Scripting

Problem with occurence of square brackets

Hello all, I have the following problem: $ cat infile this is spam and i need this too this is spam and i need this too $ perl -nwe '$_ =~ /]+ \]+)\]\]*\]? (\+)$/; print "$1 - $2\n";' infile i need this - too i need this - and i need this too I am not sure how many occurences of... (13 Replies)
Discussion started by: zaxxon
13 Replies

10. Shell Programming and Scripting

IF statement with square brackets

Hi All, Hope you all are doing good. Yesterday in my project i came across a scenario which i can not guess why it was working in one region and why it was not in another region. Please find my issue below. I am using AIX version 6.0 of UNIX in my project, in shell scripting i have the... (1 Reply)
Discussion started by: mad man
1 Replies
SHELL-QUOTE(1)						User Contributed Perl Documentation					    SHELL-QUOTE(1)

NAME
shell-quote - quote arguments for safe use, unmodified in a shell command SYNOPSIS
shell-quote [switch]... arg... DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands or files with embedded white space or shell globbing characters safely. Here are a few examples. EXAMPLES
ssh preserving args When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and passes them to "$SHELL -c". This doesn't work as intended: ssh host touch 'hi there' # fails It creates 2 files, hi and there. Instead, do this: cmd=`shell-quote touch 'hi there'` ssh host "$cmd" This gives you just 1 file, hi there. process find output It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote: eval set -- `find -type f -print0 | xargs -0 shell-quote --` debug shell scripts shell-quote is better than echo for debugging shell scripts. debug() { [ -z "$debug" ] || shell-quote "debug:" "$@" } With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can. save a command for later shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are things the user can't pass through), you can do something like this: user_switches= while [ $# != 0 ] do case x$1 in x--pass-through) [ $# -gt 1 ] || die "need an argument for $1" user_switches="$user_switches "`shell-quote -- "$2"` shift;; # process other switches esac shift done # later eval "shell-quote some-command $user_switches my args" OPTIONS
--debug Turn debugging on. --help Show the usage message and die. --version Show the version number and exit. AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions. AUTHOR
Roderick Schertler <roderick@argon.org> perl v5.16.3 2010-06-11 SHELL-QUOTE(1)
All times are GMT -4. The time now is 10:22 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy