Sponsored Content
Full Discussion: Egrep ERE to find null
Top Forums Shell Programming and Scripting Egrep ERE to find null Post 302801681 by balajesuri on Thursday 2nd of May 2013 12:18:20 PM
Old 05-02-2013
Code:
#! /bin/bash

echo "Enter job name:"
read x

while [ 1 ]
do
    echo $x | egrep -q "^$|^ *$"
    if [ $? -eq 0 ]
    then
        echo "No blank lines or spaces. Enter job name:"
        read x
    else
        break
    fi
done

echo $x

 

10 More Discussions You Might Find Interesting

1. Solaris

How to find egrep version on Solaris 10

Hi, How can I find the egrep version installed on Solaris 10 as I don't see any egrep --version option.Also wanted to know which version would support option of -A (eg. egrep -A NUM PATTERN FILE ) Print NUM lines of trailing context after matching lines. Thanks & Regards, Kiran. (6 Replies)
Discussion started by: kiranherekar
6 Replies

2. Shell Programming and Scripting

Find null fields in file

Hi All, I have some csv files out of which i want to find records which have empty values in either the 14th or 16th fields. The following is a sample. $cut -d',' -f14,16 SPS* | head -5 VOIP_ORIG_INFO,VOIP_DEST_INFO sip:445600709315@sip.com,sip:999@sip.com... (2 Replies)
Discussion started by: rahulrathod
2 Replies

3. Shell Programming and Scripting

How can find Null value in If condition

Hi, i wrote If Conditions in my script, it's returns null and some values. but i am unable to find when Null value getting. bec we need modification according null vales. pls help me on this. (2 Replies)
Discussion started by: koti_rama
2 Replies

4. UNIX for Dummies Questions & Answers

Using /dev/null with grep and find

Hi, I am trying to display the filename in which a string was found after using find and grep. For this after some googling I found that this works: find -name "*.java" -exec grep "searchStr" {} /dev/null \; I wanted to know the difference between the above and the following: find -name... (0 Replies)
Discussion started by: gaurav_s
0 Replies

5. Shell Programming and Scripting

Find out if few fields in a file are null

Hi, I've a pipe delimited file where I want to find out a number of lines where 1st 2nd and last field are null using awk/sed. Is it possible? Thanks (5 Replies)
Discussion started by: rudoraj
5 Replies

6. Shell Programming and Scripting

how to find null column

Hi, everyone I have a requirement as following: source file 1, abc, def, caaa 2, , cde, aaa 3, bcd, , adefefg I need find columns which contains null value, in above example, I need get two rows 2, , cde, aaa 3, bcd, , adefefg anybody has idea how to achive this ... (5 Replies)
Discussion started by: ken002
5 Replies

7. Shell Programming and Scripting

egrep help required to find pattern

Hi All, Can some one please help me how to grep the comments from "oracle" & "sybase" code. I would like to grep below type of pattern. -- /* */ Please help. (6 Replies)
Discussion started by: gr8_usk
6 Replies

8. Shell Programming and Scripting

How to find null column?

hi Gurus, I need find the null column in a file. my file like below abc, ,cde,def abc,ded,cdd,def abc, ,ddd,ccd aaa,bbb,ccc,ddd basic, I need to find the lines which second column is null Thanks in advance (3 Replies)
Discussion started by: ken6503
3 Replies

9. Shell Programming and Scripting

To find record having null value

Hi All My requirement is to find the null values in particular column of a file and reject it in case if it contains null values. But the challenge is that I want a common command which can be used across different file, as the position of the column we need to check for different file may get... (14 Replies)
Discussion started by: ginrkf
14 Replies

10. UNIX for Beginners Questions & Answers

Egrep find word that occurs twice in a row

Hi there I am trying to figure out and understand what the syntax would be to egrep lines that have a word occur twice in a row. the two words obviously should have a space between them and also it has to be case sensitive which I believe grep is by deffault. the closest I have come is... grep... (7 Replies)
Discussion started by: spo_2138
7 Replies
SHTOOL-ECHO.TMP(1)					      GNU Portable Shell Tool						SHTOOL-ECHO.TMP(1)

NAME
shtool-echo - GNU shtool echo(1) extensional command SYNOPSIS
shtool echo [-n|--newline] [-e|--expand] string DESCRIPTION
shtool echo is an echo(1) style command which prints string to stdout and optionally provides special expansion constructs (terminal bold mode, environment details, date, etc) and newline control. The trick of this command is that it provides a portable -n option and hides the gory details needed to find out the environment details under option -e. OPTIONS
The following command line options are available. -n, --newline By default, output is written to stdout followed by a "newline" (ASCII character 0x0a). If option -n is used, this newline character is omitted. -e, --expand If option -e is used, string can contain special "%x" constructs which are expanded before the output is written. Currently the following constructs are recognized: %B switch terminal mode to bold display mode. %b switch terminal mode back to normal display mode. %u the current user name. %U the current user id (numerical). %g the current group name. %G the current group id (numerical). %h the current hostname (without any domain extension). %d the current domain name. %D the current day of the month. %M the current month (numerical). %m the current month name. %Y the current year. EXAMPLE
# shell script shtool echo -n -e "Enter your name [%B%u%b]: "; read name shtool echo -e "Your Email address might be %u@%h%d" shtool echo -e "The current date is %D-%m-%Y" HISTORY
The GNU shtool echo command was originally written by Ralf S. Engelschall <rse@engelschall.com> in 1998 for Website META Language (WML) under the name buildinfo. It was later taken over into GNU shtool. SEE ALSO
shtool(1), echo(1). 18-Jul-2008 shtool 2.0.8 SHTOOL-ECHO.TMP(1)
All times are GMT -4. The time now is 03:58 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy