OK. So, this is exactly the opposite of what everyone asks about in network programming. Usually, people ask how to make a broken socket work. I, on the other hand am looking for the opposite. I currently have sockets working fine, and want them to break to re-create this problem we are seeing. I am not sure how to go about intent...
A web application has no make file unlike C++ or anything like that. However, it needs to be placed into specific directories...e.g /var/www. I'm new to linux packaging, so my question is, how do I package my app into a .deb such that when its being installed, it gets put into something like /etc/myprogram/bundles/myprogram-3.4? Mine i...
Looks like linux doesnt implement pthread_suspend and continue, but I really need em. I have tried cond_wait, but it is too slow. The work being threaded mostly executes in 50us but occasionally executes upwards of 500ms. The problem with cond_wait is two-fold. The mutex locking is taking comparable times to the micro second executi...
Possible Duplicate: How many files in a directory is too many? I was told that putting too many files in a directory can cause performance problems in Linux, and Windows. Is this true? And if so, what's the best way to avoid this? ...
I am doing some OS experiment. Until now, all my code utilized the real mode BIOS interrupt to manipulate hard disk and floppy. But once my code enabled the Protect Mode of the CPU, all the real mode BIOS interrupt service routine won't be available. How could I R/W the hard disk and floppy? I have a feeling that I need to do some hardwa...
Greetings all! I'm using gcc on linux to create a shared library. The library itself has no code but links to a couple of static libraries(archives) also built using gcc. I need to export the static libs' symbols through my shared library. What happens is that the resulting shared lib is too small and it actually does not contain any of...
Hi, I am trying to change from windows to linux server. And for that i am trying to enable mod_write in ubuntu. I have taken all the necessary steps to enable the mod_rewrite as mod_rewrite is displayed under loaded modules. I have set all the permissions for the .htacess file. But for some reason the rewrite does not appear to be worki...
I'm interested in contributing to a Linux distro, but regarding the various distro's developer communities, I'm having a bit of trouble figuring out which one I'd most like to join. What languages I know: C, C++, Lua, Python, and fairly familiar with Perl (though I wouldn't say I "know" it). In particular, I have very little experience ...
I need to find the size of an elf image for some computation. I have tried with the readelf utility on linux which gives the informations about the headers and section. I need to have the exact file size of the elf(on the whole). How do I find the size of the ELF from the header information or Is there any other means to find the size o...
Is it possible to somehow view another websites php files/codes? Or to rephrase the question, Can my php codes be viewed by anybody except for those who have access to the file? If so, how can I best prevent this? Thanks Ps: Server OS is Ubuntu 9.10 and PHP version is 5+ (Apache2) ...
i want to write a script in debian , which will make an application stop at a certain system time . Before anyone thinks its a homework , it is not . My internet connection allows unlimited download only in a certain time period , so i would like to stop the torrent application once the time period is over with . ...
I'm having a hard time understanding the output of ldd - Especially the processor identifiers. The string in question is this one: Shortest.so: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), dynamically linked, from ']', not stripped I have several questions about it: What does "ELF" mean? I know that's what Linux bina...
I have a device which would be interface with my processor through pcie. I have written driver for it using the existing pci file operations. Now my problem is how do I access it from user space programs? PCI File operations do not have IOCTL support and hence I cant make an ioctl call unlike other char devices. I cannot use pci_config...
How can I log out of my computer using shell such the log-in window appears again? I need this functionality in one my Linux script. Update: I want to replicate the code working behind the Logout button of my Ubuntu. Desktop Enviroment being used: GNOME ...
I am using the PHPUnit framework to write testcases for execution on the Selenium RC server. The PHP scripts and the selenium server are running in the same machine. I have written some functions like reading of XML files, command like parameters, XLIFF integration etc by extending the PHPUnit_Extensions_SeleniumTestCase class. But the p...
I'm on Sybase Iq 15.1 and try to add a dbspace to a demo database, using a raw device on Linux. I always get SQL error 1010000, file already exists: CREATE DBSPACE KLMTEST USING FILE DF1 '/dev/disk/by-id/scsi-1HITACHI_730109670008' IQ STORE; Could not execute statement. The file '/dev/disk/by-id/scsi-1HITACHI_730109670008' already exis...
Hello all, I am invoking several processes in my main and I can get the pid of that processes. Now I want to wait until all this processes have been finished and then clear the shared memory block from my parent process. Also if any of the process not finished and segfaulted I want to kill that process. So how to check from the pid of p...
where is wrong? how to assign value to eip to change the location of running in program? Please help !!!! error: cannot convert ‘mcontext_t*’ to ‘sigcontext*’ in assignment struct ucontext { unsigned long uc_flags; struct ucontext *uc_link; stack_t uc_stack; struct sigcontext uc_mcontext; sigset_t u...
I have my own multithreaded C program which scales in speed smoothly with the number of CPU cores.. I can run it with 1, 2, 3, etc threads and get linear speedup.. up to about 5.5x speed on a 6-core CPU on a Ubuntu Linux box. I had an opportunity to run the program on a very high end Sunfire x4450 with 4 quad-core Xeon processors, runni...
I am currently writing a small UDP server program in linux. The UDP server will receive packets from two different peers and will perform different operations based on from which peer it received the packet. I am trying to determine the source from where I receive the packet. However, when select returns and recvfrom is called, it return...