I realize that I am attempting to go beyond the "supported" behavior of the manf's released drivers for Perl, after all they have only released it in package with x86 .so's. However, since I cannot use their package with x64 Perl on a RHEL 5.4 x86_64 box, and maintaining a seperate install of x86 Perl just for this one package, I have m...
Hello, I am very new to programming and am trying to run a python code to see if the screen program is running and if it is then to not run the rest of the code. This is what I have and it's not working. #!/usr/bin/python import os var1 = os.system ('screen -r > /root/screenlog/screen.log') fd = open("/root/screenlog/screen.log") cont...
In follow-up to my previous questions (especially this one : http://stackoverflow.com/questions/2684123/java-volatileimage-slower-than-bufferedimage), i have noticed that simply drawing an Image (it doesn't matter if it's buffered or volatile, since the computer has no accelerated memory*, and tests shows it's doesn't change anything), t...
How can i get information via php or bash to what file referencing a symlink in linux? ...
When working sometimes ago on an embedded system with a simple MMU, I used to program dynamically this MMU to detect memory corruptions. For instance, at some moment at runtime, the foo variable was overwritten with some unexpected data (probably by a dangling pointer or whatever). So I added the additional debugging code : at init, t...
I'm trying to get bash to process data from stdin that gets piped it, but no luck, what I mean is none of the following work: echo "hello world" | test=($(< /dev/stdin)); echo test=$test test= echo "hello world" | read test; echo test=$test test= echo "hello world" | test=`cat`; echo test=$test test= where I want the output to be ...
I'm dealing with a buggy server that will sometimes fail to accept() connections (but leaves its listening socket open). This is on Linux with unix domain sockets. Currently the only way to detect this is that after sending a bunch of data, the buffer fills up and blocks, and the server isn't sending any replies. This long-after-the-fac...
I am working on x86_64 machine. My linux kernel is also 64 bit kernel. As there are different ways to implement a system call (int 80, syscall, sysenter), i wanted to know what type of system call my machine is using. I am newbie to linux. I have written a demo program. #include <stdio.h> int main() { getpid(); return 0; } getpid...
I made changes in sched.c in Linux kernel 2.4 (homework), and now the system goes into kernel panic. The strange thing is: it seems to pass A LOT of booting checks and initializations, and panics only at the very end, showing hte following stack trace: update_process_times do_timer timer_interrupt handle_IRQ_event do_IRQ call_do_IRQ do...
I am trying to send the output from the find command to OpenSSL in order to find out when certificates expire. This finds the files find . -name \*.pem -type f This generates the cert info I want openssl x509 -in certname.pem -noout -enddate Can I merge these two? Thanks for your help. ...
Hi everyone, I have a simple test application (in C) that grabs mmaped frames from my v4l device. And now, I'd like to display these frames within a tiny LessTif application (like gnome cheese, but only displaying the frames - nothing else). Do you have an idea how to implement such a LessTif program? Thanks, Dan ...
I'm writing a linux driver and I would like to register a callback function to be invoked when the system goes to sleep. What is the api to do this? Thanks. ...
I'm looking for some answers for a project I'm thinking of. I've searched and from what I understand (correct me if I'm wrong) the only way the program I want to make will work is through 3D application. Let me explain. I plan to make a studio production program but it's unique in the fact that I want to be able to make it fluid. Let me...
Hello - I mostly code in Visual Studio, I like it, but lately it's making me feel a little claustrophobic. On my MacBook Pro, I've set up PHP5 and MySQL (natively). With the built-in server on the mac, does this constitute a LAMP stack? Is Mac OSX considered a Linux Environment? I have VMWare Fusion 3, should I set up a Linux OS virtua...
I'm fairly confused with some of the terms used in Linux when I learn about web backend programming. What is the difference and relationships between "process", "threads", "task" and "jobs" in Linux? ...
Hi. I would like to make my own program but I have no idea how.. for example I want to make a typical 'Hello $user' program. So.. ├── hi │ ├── hi.sh │ ├── hi_to.sh hi.sh #!/bin/bash ~/hi/hi_to.sh $1 hi_to.sh #!/usr/bin/php <?php echo "\nHellO ".$argv[1]."\n"; ?> Run it in terminal: me:~/hi → ./hi.sh User He...
Hi, I`am experimenting with shellcode and stumbled upon the nop-slide technique. I wrote a little tool that takes buffer-size as a parameter and constructs a buffer like this: [ NOP | SC | RET ], with NOP taking half of the buffer, followed by the shellcode and the rest filled with the (guessed) return address. Its very similar to the t...
I have a PHP script on Linux in which the sticky bit is set, so it gets executed as the file owner. How can I get the user id of the calling process, for authorization purposes? Context: I have two applications on a server, and want one to request some info from the other. For this reason the other offers a script with setuid, but I wan...
I was inspecting the code of a linux application and i saw the #include in one of the code files. I tried looking it up on opengroup.org but i couldn't find it there, this is what the sys directory looks like: http://www.opengroup.org/onlinepubs/000095399/basedefs/sys/ . I guess it's not standard header file, but i checked it in my /usr...
When I Ctrl C my program on linux I often get output that looks similar to a stack-dump (a crash). Can I catch the Ctrl-C signal and exit gracefully? Thanks! ...