Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Need Help to deal with empty string
Top Forums Shell Programming and Scripting Need Help to deal with empty string Post 302267404 by matrixmadhan on Friday 12th of December 2008 09:39:10 AM
Old 12-12-2008
-q option of the grep
Code:
grep -q "search_string" filename

if [ $? -eq 0 ]
then
  echo "search string found"
else
  echo "search string not found"
fi

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to check for null or empty string

Hi, I need to check for value not equal (<>) to 21 and not equal empty or null values. Please modify this script if then echo "$VALUE,$BSC_NAME,$BSC_ID" > $OUT_FILE/power_up.out end if TQ (5 Replies)
Discussion started by: doer
5 Replies

2. Shell Programming and Scripting

Check for empty string

Hello All, I have written shell script whcih at the max 3 parameters. When only one commandline argument and other two command line arguments are passed as empty string like eg : archive ' ' ' ' Then i need to check whether the commandline... (12 Replies)
Discussion started by: rahman_riyaz
12 Replies

3. Shell Programming and Scripting

Initializing empty string with spaces

Hi, I want to Initialize a String with 50 spaces. I can do that by ex: Var1=" " But i dont want to do in this way? Is there any unix command where i can specify no of spaces to a varaible? like space(50) (1 Reply)
Discussion started by: Shiv_18
1 Replies

4. UNIX for Dummies Questions & Answers

Check to see if string var is empty

i have a veriable set var1 set var2 = abcd how can i check if var 1 is empty and if var 2 is not empty ??? (2 Replies)
Discussion started by: nirnir26
2 Replies

5. Shell Programming and Scripting

Replace empty string on particular column

Hi I would like to replace empty string with a particluar value, any suggessions with awk ? my input file is not delimited with any delimiters input 52001073M8000000004567777 5200107 000000004567778 5200107 000000004567779 52001073M8000000004567789 Expected output... (5 Replies)
Discussion started by: selvankj
5 Replies

6. Shell Programming and Scripting

Perl : how to match non-empty string that has no spaces

Hi Everyone, I am looking for neat way to grep a non-empty string that basically contains a hostname, which might be in FWDN form or without the domain, for example: hostname.internal.domainname.net The file I am parsing contains blan lines (^$) and also series of "-" which in other places... (2 Replies)
Discussion started by: togr
2 Replies

7. Programming

Checking not empty string

I have a string s Are the following equivalent? if ( ! s.empty() ) { } if ( s ) { } (1 Reply)
Discussion started by: kristinu
1 Replies

8. Shell Programming and Scripting

Check if the string is empty

I am reading from a file and executing the jobs with/without parameters as the job requires. File job1 R job2 job3 Y 123 if then <job>.ksh else <job>.ksh $params fi This works fine if the line read from the file has parameters it executes like job1.ksh R But for... (2 Replies)
Discussion started by: nw2unx123
2 Replies

9. Shell Programming and Scripting

How to check empty string in an XML tag?

I have an XML tag <abc> which is empty as <abc></abc>.If the the tag is empty I want to flag the file as bad. Please help. Thanks (3 Replies)
Discussion started by: aneeta13
3 Replies

10. Shell Programming and Scripting

Cant check empty string

Hello So i have that script collection, in which i have a single script to create a configuration file. In there, i have multiple occourences of something like this: prj_title=$(tui-read "What is the TITLE? ($prj_name):") ] && prj_title="${prj_name/_/ }" They all work as expected, if... (5 Replies)
Discussion started by: sea
5 Replies

LEARN ABOUT DEBIAN

lp-shell

lp-shell(1)						      General Commands Manual						       lp-shell(1)

NAME

       lp-shell - Open an interactive launchpadlib shell.

SYNOPSIS

       lp-shell [-a] [-cPROGRAM] [--python] [--ipython] [service] [LP API version]

DESCRIPTION

       lp-shell opens an interactive Python shell with a launchpadlib.Launchpad object "lp" which is ready for use.

       It  authenticates against Launchpad with the consumer name "udt-lp-shell". When using lp-shell with the -a option it will use the anonymous
       login from launchpadlib.Launchpad.

       By default lp-shell connects to the "production" Launchpad service using the "1.0" LP API version.

       If you want to connect to another Launchpad service, call lp-shell with the service name as the second argument. lp-shell supports all ser-
       vices known by launchpadlib Python module.  Currently known are (list can be incomplete or outdated): "production", "staging", "dogfood".

       A  different  LP  API version can be selected by passing the API version to use as the third argument. Current supported are: "beta", "1.0"
       and "devel".

OPTIONS

       -a     Login anonymously into Launchpad.

       -c PROGRAM
	      Don't enter a shell but only run the specified Python program and exit.

       --ipython
	      Use an ipython shell if available (default).

       --python
	      Use a regular python shell.

AUTHORS

       lp-shell was written by Martin Pitt <martin.pitt@ubuntu.com>.

       It is released under the terms of the GNU General Public License, version 2 or (at your option) any later version.

lptools 							   27 March 2010						       lp-shell(1)
All times are GMT -4. The time now is 11:06 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy