I'm learning how to program kernel drivers, and I'm making a hello world module for that. But I can't find the cause of some errors... My module as three files:
I'm trying to compile the hidtouch driver, but hit a snag. The error I get is
[code]....
Context: this is the driver for the touchscreen attached to an LTSP client. The server uses the AMD64 arch, the client uses the 1386 arch, both Debian. The client does start, but lacking a pointer device the pointer is useless. The build takes place on the server, in the i386 chroot of the LTSP setup. Basically, I'm stuck now...
I'm trying to create a program from 2 files - main.cpp that contains the main function, and modules.c that contains the definitions of the functions that are called in main(). modules.c only contain function definitions, no main function.
My Makefile is as follows:
Code:
I have included "modules.h", which contains all the function declarations, in my main.cpp.
When I try to make using this Makefile, I get the error
Code:
If I switch the order of modules.o and main.o in my $(TARGET) line, then I get errors that say "undefined reference to" the functions I have defined in modules.c, in main.cpp.
I used an execl call to dmidecode and parsed it using sed to get serial numbersso a business friend could make a (mostly) unique serial when his cross platform software is installed on different machines.I know this is falling outside the spirit of Linux being a profit thing, but the request has been to now do the same thing without using Linux commands. Which sounds like a chore since I would be re-inventing something that already exist namely dmidecode. Is the source available for dmidecode?I have no idea where to start to look for the info like dmidecode provides.
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.
Looks like my package manager was severely screwed. Any package manager-related command I try to run results in the following message in the console:
Code:
E: Read error - read (5: Input/output error) E: The package lists or status file could not be parsed or opened. Anything - aptitude, apt-get.
I removed all my sources.lists, I tried running apt-cache clean It didn't help. This is really serious. Not only am I unable to do anything with packages (update, remove, install), but the machine is really slow because of this.
I wrote a test program for learning usage of realloc() and I thin I did everything right but I get this error exactly with my 4th time that while tries to reallocate memory in MakeDSt function for DSt->SArray:
I assumed that the error was due to the difference between the 1st argument and 2nd argument, However, changing the difference to the accepted dns message size (512 bytes) or even to no difference at all did nothing to remove the error.
Further, I am trying to check the output after having first compressed a domain name using dn_comp into *out_rr. This function call is in order to check whether the compression is happening correctly.
i'am tring to use generic netlink and can't find function for blocking not busy waiting receive. I'll try to explain myself. Generic netlink receive mechanism based on callback function - when module receives something,this function invoked. But this is not so good if you need to send something and receive answer. I mean something like that :
sendmsg(); if(recvmsg() < 0) goto err; I need generic netlink recv() function, or some mechanism to implement it. I just want to stay in "recvmsg()" function until i have answer(until call_back function invoked).
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
I have Ubuntu 11.0 installed.It is giving following error during update:
'E:Encountered a section with no Package: header, Eroblem with MergeList /var/lib/apt/lists/mirror.csclub.uwaterloo.ca_ubuntu_dists_natty_main _binary-i386_Packages, E:The package lists or status file could not be parsed or opened.'
I'm trying to debug a gtk app on ubuntu that crashes from time to time when I open a dialog. Lately I have found a sequence of actions that always reproduces the bug. And I always get this error: Assertion 'pthread_setspecific(t->key, userdata) == 0' failed at pulsecore/thread-posic.c:200, function pa_tls_set(). Aborting.
So my app seems to crash because an error in pulseaudio, which is strange. I made some google search and apparently, this problem exists with other apps. Then, following a suggestion in a bug report, I opened sound-preferences and disabled windows and buttons sounds. And surprise? No more crash. I know that gtk handles events from windows and buttons and so does pulseaudio. So, could it possibly be a bug in pulseaudio instead of in my app? Does anyone have an idea of what's going on here?
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.
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
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)
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?
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?
Code: #!/bin/sh #System commands and other configurable. IPT=/sbin/iptables IP6T=/sbin/ip6tables IPST=/usr/sbin/ipset MODP=/sbin/modprobe GET=/usr/bin/wget INT_NET=192.168.1.0/24 .....
I can find lots of tutorials in how to use if, then, else. However, how do I define a variable inside the function? SEE>> Code: for c in $ISO Also, am I using the 'test' command correctly( -/+ week as valid test)?
I am doing a web site program and what I need is to call a C program in the PHP cloud.Do u think it would be possible? The web site would get the user input from PHP UI and pass to the C program , the C program would process the function with the user input and output the a PHP page.
Code: return ((unsigned int)(unsigned long)base & TBASE_DEFERRABLE_FLAG); What is the above function returning.I am not clear with definition of what is being returned in the above code.
