03-21-2006
need to read a file and keep waiting till it satisfies some condition
In my script i am writing to a counter file the no of processes i had started,
that is each time i start a process, i will increment the content of counter file and also when the process ends i will decrement the content of the file.
after this i do some other activities, by now i want to decide to execute further or wait till the processes i started earlier got over.
So i keep reading the counter file for till content becoming zero.
I am confused of writing the above part in script please help me writing a loop to keep reading the file till the contents become zero.
regards,
Senthil
10 More Discussions You Might Find Interesting
1. Post Here to Contact Site Administrators and Moderators
Hi ,
I want to read a file starting with "*" up to till it encounters a blank line and to redirect this output to a different file.Plz suggest how to write a script for this.
e.g:-
* PK Sent Email (11.23)
CALYPSO 1243215 9116457 NEW TRAD FAILED Nov 23 2007 9:34AM OASYS: DPS:... (0 Replies)
Discussion started by: adityam
0 Replies
2. Shell Programming and Scripting
Hi ,
I want to read a file starting with "*" up to till it encounters a blank line and to redirect this output to a different file.Plz suggest how to write a script for this.
e.g:-
* PK Sent Email (11.23)
CALYPSO 1243215 9116457 NEW TRAD FAILED Nov 23 2007 9:34AM OASYS: DPS: SINGCORP invalid... (1 Reply)
Discussion started by: adityam
1 Replies
3. UNIX for Dummies Questions & Answers
Hi ,
I want to read a file starting with "*" up to till it encounters a blank line and to redirect this output to a different file.Plz suggest how to write a script for this.
e.g:-
* PK Sent Email (11.23)
CALYPSO 1243215 9116457 NEW TRAD FAILED Nov 23 2007 9:34AM OASYS: DPS: SINGCORP invalid... (1 Reply)
Discussion started by: adityam
1 Replies
4. Shell Programming and Scripting
Hi all
i have a file like
2006,1,2
2007,2,3
2008,3,4
I will read this and my output should be like
2006,1,2
2007,1,2
2008,1,2
2007,2,3
2008,2,3
2008,3,4
Giving the explanation, we will read the first line of the file and if the year any other than current year, we will print as many... (1 Reply)
Discussion started by: vasuarjula
1 Replies
5. Shell Programming and Scripting
Hi Guys,
I am writing a shell script to check whether the directory is empty or not.
If it is empty then proceed but if it not then wait till it becomes empty.
Is there any way for this?
Suggestions are welcome!!
Thanks in advance!:) (13 Replies)
Discussion started by: AB10
13 Replies
6. UNIX for Dummies Questions & Answers
Hello All,
i am a newbie and need some help when reading a csv file in a bourne shell script. I want to read 10 lines, then wait for a minute and then do a reading of another 10 lines and so on in the same way. I want to do this till the end of file.
Any inputs are appreciated
... (3 Replies)
Discussion started by: victor.s
3 Replies
7. Shell Programming and Scripting
Hi All,
I would like to check a condition in a nxm matrix and if the condition satisfies then, I need to write the matrix element in the output file.
For example, I have a matrix like this:
1 2 3 4 5
2 3 4 5 1
3 4 5 1 ... (8 Replies)
Discussion started by: Fredrick
8 Replies
8. Shell Programming and Scripting
Dear All,
Good Day. I would like to solve the following issue and got some strange results, if anyone could help me in this regard, you are most welcome.
Here is the problem:
I have a file like
Header Value1 Value2 Value3 Value4 Value5 Value6 ... Value9
12.144 6 5 ... (8 Replies)
Discussion started by: Fredrick
8 Replies
9. Shell Programming and Scripting
Hi All,
Am trying to write wrapper shell/bash script on a utility tool for which i need to pass 2 files as arugment to execute utility tool.
Wraper script am trying is to do with above metion 2 files.
utility tool accepts :
a. userinfo file : which contains username
b. item file : which... (2 Replies)
Discussion started by: Optimus81
2 Replies
10. Shell Programming and Scripting
Hi All,
I have one query, I managed to run script with user inputs through command line or with 1 file.
But I need to read a txt file/xml file in which user can mention multiple sets of answers and script should run for each set till it reach the EOF.
Thanks in advance
for example, the file... (3 Replies)
Discussion started by: rv_champ
3 Replies
LEARN ABOUT DEBIAN
file::counterfile
CounterFile(3pm) User Contributed Perl Documentation CounterFile(3pm)
NAME
File::CounterFile - Persistent counter class
SYNOPSIS
use File::CounterFile;
$c = File::CounterFile->new("COUNTER", "aa00");
$id = $c->inc;
open(F, ">F$id");
DESCRIPTION
This module implements a persistent counter class. Each counter is represented by a separate file in the file system. File locking is
applied, so multiple processes can attempt to access a counter simultaneously without risk of counter destruction.
You give the file name as the first parameter to the object constructor ("new"). The file is created if it does not exist.
If the file name does not start with "/" or ".", then it is interpreted as a file relative to $File::CounterFile::DEFAULT_DIR. The default
value for this variable is initialized from the environment variable "TMPDIR", or /usr/tmp if no environment variable is defined. You may
want to assign a different value to this variable before creating counters.
If you pass a second parameter to the constructor, it sets the initial value for a new counter. This parameter only takes effect when the
file is created (i.e. it does not exist before the call).
When you call the "inc()" method, you increment the counter value by one. When you call "dec()", the counter value is decremented. In both
cases the new value is returned. The "dec()" method only works for numerical counters (digits only).
You can peek at the value of the counter (without incrementing it) by using the "value()" method.
The counter can be locked and unlocked with the "lock()" and "unlock()" methods. Incrementing and value retrieval are faster when the
counter is locked, because we do not have to update the counter file all the time. You can query whether the counter is locked with the
"locked()" method.
There is also an operator overloading interface to the File::CounterFile object. This means that you can use the "++" operator for
incrementing and the "--" operator for decrementing the counter, and you can interpolate counters directly into strings.
COPYRIGHT
Copyright (c) 1995-1998,2002,2003 Gisle Aas. All rights reserved.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
AUTHOR
Gisle Aas <gisle@aas.no>
perl v5.10.0 2004-01-23 CounterFile(3pm)