07-17-2007
Simple loop query
Hi All
Just started with shell scripts and am stumped by, what is to most of you no doubt, a simple issue.
All I'm trying to do is prompt a user for input and writing to a log file. If the user types the word 'stop', then the program should halt. If the word typed is 'clear', then the log file should be cleared.
Starting simply(!), all I've got so far is:
LOGDIR=/some/dir/
TARGETFILE="whatever"
ans="abc"
while [ ${ans} != "stop" }
do
echo "Enter text:"
read ${ans}
echo ${ans} >>${LOGDIR}/${TARGETFILE}
done
All that happens is the original value of "abc" is written to the log. Obviously the variable isn't being overwritten by the user input. Can anyone help with basic help for a newbie?
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
hi,
i would like to replace a string in a series of files with another string, without outputting to new files. is this possible?
i've tried using sed, and started by trying to alter the contents of one file...
sed 's/string1/string2/g' file.txt
but while this does the replacement on... (2 Replies)
Discussion started by: schmark
2 Replies
2. Shell Programming and Scripting
I want to write a script to go to particular path in file and run shell script from there.
what will be shell script for the same. (2 Replies)
Discussion started by: shekhar_ssm
2 Replies
3. Shell Programming and Scripting
Dear,
I have a alarm text file, containing minor and major alarms, i am intrested in Mojor alarm with its alarm header and next four lines in seperate file....
Can anybody help me with this below is the alarm file output.
:SEV="MAJOR":
Object-Instance %
unit-type % bts nbr % 25
... (5 Replies)
Discussion started by: Danish Shakil
5 Replies
4. Shell Programming and Scripting
Filename.txt
My First Line
My Second Line
::::While Loop:::
Program:
while read line
do
echo "$line"
done < Filename.txt
output:
My First Line
My Second Line
Is it possible to use for loop to get the same output.
I have tried executing below code but i get every word of my file... (8 Replies)
Discussion started by: pinga123
8 Replies
5. Programming
Given the following code inside the function ext3_write_super():
(It's there in Linux kernel 2.6.27.59)
static void ext3_write_super (struct super_block * sb)
{
if (mutex_trylock(&sb->s_lock) != 0)
BUG();
sb->s_dirt = 0;
}
The conditional test at if... (2 Replies)
Discussion started by: Praveen_218
2 Replies
6. Shell Programming and Scripting
Hi friends,
One of my shell program(test.ksh) contains the following if loop.Can anyone please explain me how this loop will work
The shell script will be executed as test.ksh -d all
The value of variables are
user=all
opt=-d
if &&
then
&& _del_all_w=1 || _group="${1}"... (1 Reply)
Discussion started by: kavithakuttyk
1 Replies
7. Shell Programming and Scripting
I have a script script.shwhich is scheduled to run at 11 AM everyday.
# script.sh Code:
./scb_script.sh &
unfortunately scb_script.sh is running today in infinite loop as respective files are not available.
My question, when script.sh starts running tomorrow, will the old process be... (1 Reply)
Discussion started by: JSKOBS
1 Replies
8. Shell Programming and Scripting
Hi all...
I am using a for loop for another part of AudioScope...
Consider this code:-
for n in {0..100}
do
if }" = "another_string" ]
then
break
fi
done
This works perfectly except I am not sure if breaking out of a 'for' loop might cause... (2 Replies)
Discussion started by: wisecracker
2 Replies
9. Programming
Dear community,
please help with a query on Oracle. I'm using SQLPlus (but with SQLDeveloper is the same) to accamplish a sinple query like:
select count(*) from ARCHIT_D_TB where (TYP_ID=22 OR TYP_ID=23) and SUB_TM like '%SEP%' and CONS=1234This is a very simple query that works perfect until... (5 Replies)
Discussion started by: Lord Spectre
5 Replies
10. UNIX for Beginners Questions & Answers
Hi, its getting aborted with below IF loop, can plz guide me what im missing here
if || ; then
echo "print $APPEND"
fi (3 Replies)
Discussion started by: JSKOBS
3 Replies
LEARN ABOUT DEBIAN
authen::simple::kerberos
Authen::Simple::Kerberos(3pm) User Contributed Perl Documentation Authen::Simple::Kerberos(3pm)
NAME
Authen::Simple::Kerberos - Simple Kerberos authentication
SYNOPSIS
use Authen::Simple::Kerberos;
my $kerberos = Authen::Simple::Kerberos->new(
realm => 'REALM.COMPANY.COM'
);
if ( $kerberos->authenticate( $username, $password ) ) {
# successfull authentication
}
# or as a mod_perl Authen handler
PerlModule Authen::Simple::Apache
PerlModule Authen::Simple::Kerberos
PerlSetVar AuthenSimpleKerberos_realm "REALM.COMPANY.COM"
<Location /protected>
PerlAuthenHandler Authen::Simple::Kerberos
AuthType Basic
AuthName "Protected Area"
Require valid-user
</Location>
DESCRIPTION
Kerberos authentication.
METHODS
* new
This method takes a hash of parameters. The following options are valid:
* realm Kerberos realm.
realm => 'REALM.COMPANY.COM'
* log Any object that supports "debug", "info", "error" and "warn".
log => Log::Log4perl->get_logger('Authen::Simple::Kerberos')
* authenticate( $username, $password )
Returns true on success and false on failure.
SEE ALSO
Authen::Simple.
Authen::Krb5::Simple.
AUTHOR
Christian Hansen "ch@ngmedia.com"
COPYRIGHT
This program is free software, you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.8.8 2008-03-01 Authen::Simple::Kerberos(3pm)