Programming :: Write A Function That Shall Execute Periodic?

Sep 1, 2010

I want to write a function that shall execute periodic. means if i set time 1 sec that function should execute in each 1 sec. let us call that function func1. But i dnt want to wait inside the func1 for that 1 sec. Meanwhile i want to run another function say func2 in background . some thing like less priority function. Whnever the time come to execute the periodic function func1 it has to go to func1 and then again in the waiting time , the second function func2 will resume. I wanted to know how to do it.. Can somebody tell me is it possible using signal in linux.

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Programming :: __attribute__ ((constructor)) Function Does Not Execute

Mar 16, 2011

My setup is Ubuntu 10.04, eclipse 3.5.2 I have created the source for a shared object and a test program to test it. The program executes dlopen() and I get back a valid library handle. I can use that handle and dlsym() to get the address of my C exported functions just as I expect. I recently added a change to have the so instantiate an object at load time by using a __attribute__ ((constructor)) function named so_init(). I also added a main() function (one wasn't required before). Adding a bunch of printf()s and using the debugger in eclipse I watch the code run and the so_init() and main() functions are never called. As far as I can tell, eclipse has -shared, -fPIC and -Wl setup and specified correctly. Am I missing a compile/link flag? Is there some magic I need in the so_main.cpp to get this working. I have this written as dual source code. The same code works quite nicely in Windows which calls dllMain() as expected.

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Programming :: Execute A Function Which Is In A Object File Throgh Libbfd?

Sep 10, 2010

I hava a source file add.c

int add(int a,int b){
return a+b;
}

then i compile it, gcc -c add.c now we get a object file add.o, I want to execute the function add(int a,int b)(the functinon in the object file add.o) how can i use libbfd to execute it?

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Programming :: How To Write / Use Function

May 30, 2010

Can you offer me the code about fmod() in C. I want to know how this function work, i am very interested in it because i have no idea to implement it, i want to know... how to write the function... not 'how to use the function' can anyone post the source codes of this function here?

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Programming :: Write A Function In A Shell Script?

Sep 22, 2010

I need a help regarding writing a function in a shell, what exactly a function does!!

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Programming :: Write A Function That Counts The Number Of Occurrences Of A Pair Of Letters In A String?

Sep 9, 2010

Some help with this problem:Code:Write a function that counts the number of occurrences of a pair of letters in a string

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Programming :: Write Some Code That Involves Creating A Function To Return A Vector Iterator?

Jan 21, 2011

I'm trying to write some code that involves creating a function to return a vector iterator.I'm not sure what is wrong.

Code:
template <typename T> class VectorTemplate
{

[code]....

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Programming :: Write A Perl Script Which Will Give An Interactive Session To A User To Execute Command On The Server

Feb 25, 2011

I am trying to write a perl script which will give an interactive session to a user to execute command on the server. I have written a small script to do this :

Code: !/usr/bin/perl -w
use strict;
use Net::SSH::Perl;
my $host = '192.168.1.1';
my $username = 'user';
my $login_passwd = 'test123';

[Code]...

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General :: Write Script To Use Function And Still Keep Function Active?

Feb 21, 2010

the function terminates if no key is pressed for 10 consecutive seconds. I tried using the -t option as suggested in some forums, but my version of showkey doesn't have the option of changing the timeout. The options I get are:

-h --helpdisplay this help text
-a --asciidisplay the decimal/octal/hex values of the keys
-s --scancodesdisplay only the raw scan-codes
-k --keycodesdisplay only the interpreted keycodes (default).

Is it possible to write a script to use this function and still keep the function active until an interrupt is recieved?

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Programming :: C++: Defining A New Class - Periodic B.c?

Apr 9, 2010

I am trying to make a periodic boundary condition type function, using an existing class given to me in lecture notes, but am having some trouble! Effectively, I am trying to make an array such that, for a point in any row of a 2D matrix ("Matrix(i,j)"), the command "next_i[i]" will return "(i+1)%L", where L is the number of data points in the row. This will enable me to select a point to the right of any point in the matrix: "Matrix(next[i],j)"

[Code]....

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Server :: Call A C Function Or To Execute A C Pgm O/p From Php?

Apr 6, 2011

how to call a c function or to execute a c pgm o/p from php file and this output should be displayed in the html page ? I have tried with system() and exec()but its not working.

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Programming :: How Can A Friend Function Access A Public Function From A Base Class

Nov 16, 2010

Code:
#include <iostream>
using namespace std;

[code]...

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Programming :: Passing Data From Interrupt Handler Function To Tasklet Function?

May 18, 2010

I am doing some Linux kernel programming for my research project. I need to record the timestamp (by using cpuid and rdtsc) when an interrupt handler (top half) is first invoked. Due to the time critical nature of the problem itself, I have to do the timestamping inside the interrupt handler itself (the first operation when the handler is called). However, I understand that tasks that are not so time critical should be deferred to a tasklet function (bottom half) for processing because other interrupts are disabled in a (top-half) interrupt handler. I am currently out of idea on how I can pass the timestamp information that I have obtained in the interrupt handler to the corresponding tasklet function.

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Server :: Make A C Function Present In The Library To Execute In Php?

Apr 10, 2011

how to make a c function present in the library to execute in php and should be able to pass a any new argument back to the c library from php

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General :: File Permission. Write And Execute Only?

Jan 11, 2011

Is there any use if a file has only write and execute permission and not read permission?

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Programming :: Declaring A Function In A Function - C Programming

May 24, 2010

I want to declare a function in a function, but had no success till now, see the error code below and visit the project at sourceforge

[Code]...

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Programming :: Bash Array Add Function Example Using Indirect Array Reference As Function Argument?

Jun 20, 2010

I looked on the net for such function or example and didin't find anything, thus after having made one i guess it would be legitimate to drop it to see what others thinks of it.

#!/bin/bash
addelementtoarray()
{
local arrayname=$1

[code]....

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General :: Write A Telnet Server Without Username/password Function

Sep 24, 2010

i am trying to write a telnet server without username/password function. how to implement such function? the source code from inetutils seems complicated..

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Security :: Remove Read/write/execute Permeation From Directories In '/' For 'others' ?

May 4, 2010

I was running '# ls -l' in '/' directory and I noticed all directories in '/' have the following permeation 'drwxr-xr-x' [except root's home which is 'drwx------' (after I change it from 'drwxr-xr-x' )]

I don't want all the user (except root) to be able to read and execute (in) any directory, I just want every user to be abel to read/write/execute only in his/her home directory.

my question is, is it ok to change file and directory permeation of the following directories in '/' from 'drwxr-xr-x' to 'drwxr-x---' or 'drwx------' recursively?

/bin
/boot
/dev
/etc

[Code]....

-I and the other users use the pc for internet, open office and email mainly.

-It does not run server(s) like smb/cif or NFS.

-There are 5 usernames (created by me, non of them are superusers) in th pc, only one user is required to login at any one time.

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Software :: Write _ Debug _ Execute Programs Of Yacc And Flex?

Jan 2, 2011

I am using kubuntu 10.04 Linux.. How can I write and debug and execute programs of yacc and flex ?

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Software :: In Platform \ Use Ioctl Function To Read/write Data To Hid Device?

Jun 24, 2011

Now i have a problem.I want to used a hid usb device under linux 2.6.11.But i can't know how to used ioctl function to send and receive data to a hid device

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General :: Write A Script To Execute A Fortran Code That Reads In Parameters From Keyboard Typing?

Apr 18, 2011

I am trying to write a script (especially C-shell) to execute a fortran code that reads in parameters from keyboard typing. I will have to process this .F code for many times with the parameters the same for all my data files, therefore, I don't have to type in everytime I execute the .F code. But I don't know what is the command in c shell to read in a text files that contains all the parameters I want and can make the shell read in appropriately to feed the .F code.

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Programming :: Socket And Timer Programming - Server Doesn't Execute Any Msg Which Client Sent

May 16, 2011

i have a server program which accept multiple client connection and am using polling. like every 2 secs it will look to client whether any data is received after it binded. i have used setitimer but there is runtime error i got.. the server accept all client connection but doesn't execute any msg which client sent.

#include<stdio.h>
#include<stdlib.h>
#include<sys/socket.h>
#include<sys/types.h>
#include<netdb.h>
#include<unistd.h>
#include<pthread.h>
#include<string.h>
[Code]....

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Programming :: Surface Fitting Using NR Function Svdfit ( ) In C Programming?

Sep 16, 2010

fit a surface i.e. W(x,y) using svdfit() provided by "Numerical Recipes in C". svdfit() is written for curve fitting and not for surface fitting.But one can use svdfit(), as claimed by authors of NR book, to do surface fitting. On page 680 of NR book, authors have given a hint on how to use svdfit() for fitting a surface. But I have not understood it.This link may be helpful (Chapter 15 th is relevant here.):[URL]This is my problem:

Code:
I have a set of 100 numbers. I want to fit a 2-Dimensional function W(x,y) to these numbers.

[code]....

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General :: Write A Shell Script That Allows Only User 1 And User 2 To Execute A Program?

Feb 25, 2010

I've looked everywhere but I can't find where to change the default box for incoming mail, or am I on the wrong track. It's a nuisance having to change folders and I can't configure wastebin to empty on exit.And I can't get kmail to import from evolution. Do I have to go to the evolution storage and do it manually, and if so, how do I do that?

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General :: Write A Shell Script Instead Of Shell Function?

Apr 27, 2011

I would like know when it is necessary or advisable to write a shell script instead of shell function ?

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Ubuntu :: Periodic Maintenance Necessary For System?

Jan 16, 2011

I have just created a periodic maintenance schedule for friends using Windows XP, covering tasks needing to be done weekly, monthly, semi-annually and annually. That set me to wondering what maintenance my Kubuntu system needs. What periodic maintenance do you do?

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Programming :: Calling An Asm Function From C?

Jun 4, 2010

I have a question about calling an asm function from C....It doesn't work unless I create an asm variable to hold the value of the function in....Why?Here's the code that doesn't work...

asmfile.s - version one Code: .section .data
mydata: .ascii "this is the message!
.equ mylen, . - mydata

[code]...

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Programming :: Using Backtrace() Function In C?

Jul 23, 2010

I want to use backtrace() function to debug a crash issue. I tried this sample code to see how backtrace works. backtrace() function always returns 0 with the below code. Is there any kernel configuration that needs to be set for proper working of backtrace?

#include <execinfo.h>
#include <stdio.h>
#include <stdlib.h>
/* Obtain a backtrace and print it to stdout. */
void
print_trace (void)

[Code]...

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Programming :: Accessing C Function From C++

Jul 5, 2010

i have an open source application that was developed in C++ (it uses objects and namespaces all over the place). I also have another application that was developed in C. Now i am trying to insert the code made in C into C++ application, but when i do that , i get this error on compilation of the source code:

Code:
error: 'mpi_init_vars' was not declared in this scope the function mpi_init_vars() is not part of object oriented programming and it doesn't belong to any scope, it was compiled into an object file and i am linking it with all objects of C++ application.

How can invoke the C function from C++ object oriented code?

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