C is a general-purpose computer programming language used for operating systems, games and other high performance work and is clearly distinct from C++. Questions about programming in C are off topic and will be closed or migrated. Consider asking your question at Stack Overflow instead.

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execvp exec format error for shell script on Red Hat Enterprise Linux 6

We have two RHEL 6 systems that are running identical versions of the kernel and glibc (glibc–2.12–1.90.el6_3.6). According to the POSIX standard and the Linux man pages, if the kernel determines that ...
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What's the most easy-to-install Neural Network C++ library with command-line for Linux? [closed]

I'm a fan of the "test first" approach to programming. My C++ program needs a neural net. I've been trying FANN (http://leenissen.dk/fann/wp/) but it's been a struggle, as it requires a language ...
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235 views

Linux file contains “@^@^@^@”, how to restore?

I just finished writing a large c code, but when I save and open again the file contains strange characters: ...
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5answers
39 views

Why does the shell perform pathname expansion for utilities?

This question is a sequel of how does grep work? It seems that the shell does the expansion of *.* to all applicable/available files and provide that to utilities like grep. Why does the shell need ...
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1answer
128 views

Where can I download the .so for OpenSSL

Does anyone know if it is possible to download the latest shared library of OpenSSL from their website? I can only find the source, so maybe they don't make it available. I know I can build this ...
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169 views

Full screen mode not working for tc

I am using a windows 7 os. I am assigned by my instructor to write a C program to draw a circle. I was asked to do it using turbo c. Now, I have installed tc from an old cd of mine. When I open my ...
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727 views

How to mix MP3's using LAME

I have N MP3 files (N files for example). I need to superimpose, or mix them into one. Is there a special LAME function for performing such an operation?
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2answers
46 views

Copying Unix Executable File content from file to file

I am simply experimenting but have found a phenomena that I would be very appreciative if someone could try to explain. I write a simple Hello World program in C. Use gcc to compile this program into ...
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80 views

Making the keyboard eject switch work

I am using Linux.My keyboard switch for ejecting the CDROM does not work though it displays an eject button on the screen. I need to make it work. I know ejecting a cdrom using system call is as ...
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3answers
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How to maximize GNOME Terminal on Linux

Environment: Red Hat Enterprise Linux, C language , Eclipse IDE for C/C++ Developers Question: I'm programming a typing tutor which run on GNOME terminal, i want to maximize terminal when run ...
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962 views

Using (embedding?) wireshark in a C application for sniffing [closed]

I'm writing a C/C++ application which needs (among other things) to sniff packets and save the output in a file. This file will be read and processed by wireshark after a few days, using a LUA script ...
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438 views

Linux/Bash: Comment every line matching a pattern

sed is foreign to me, to say the least. I'd like to traverse a C project tree and comment out every line calling the function LogMsg(). Something that'd achieve the following: foreach: line within ...
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when trying to install the watir or watir-webdriver gem on Windows 7 via cygwin, getting long C stack trace with mentions of “W32 socket” issues

When running: $ gem install watir on Windows 7 (cygwin), I get this ERROR: Error installing watir: ERROR: Failed to build gem native extension. /usr/bin/ruby.exe extconf.rb checking for ffi.h... ...
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2answers
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How can I install GCC on Mac OS X Lion without Xcode?

I find it really hard to believe there is not a simple solution to install GCC on Mac without having to download and install more than 1 GB+ of Xcode. I found a site that helps reduce the amount ...
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2answers
96 views

How can code/software access locations in memory that it's not supposed to?

By default, when applications run, they are limited in the amount of RAM they are allowed to access right? Technically my VLC could not access memory addresses used by Chrome. But how is it possible ...
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3answers
850 views

Change network settings programmatically without root

I want to change network configurations like dhcp, ip address and so on programmatically. But what I don't want, is to run my application as root. So my question is: What would be a common approach ...
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337 views

How to invoke shell script while staying in interactive mode

When I call: execl("/bin/sh", "/bin/sh", (void *) NULL); The /bin/sh/ program is started, which opens a shell in which I can type commands. However, if I call: execl("/bin/sh", "/bin/sh", ...
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75 views

How to know on which socket is a processor core?

I have a dual socket 8 core system, 4 cores on one socket and the other 4 cores on the other socket. How can I find, which core is on which socket through /proc/cpuinfo. For example here, on which ...
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3answers
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How can I automatically lock the screen when idle in CentOS?

How can I automatically lock the screen when idle in CentOS? I would like it so that a user has to re-enter their password once the machine has been idle for a period of time. If there is no option ...
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5answers
987 views

How do sockets deal with routers?

(Not sure if this should be on the unix stackexchange site...) When I make a socket I use IPv4 and a port number. So if I know both of these, but there's a router set up (on a home network; just ...
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2answers
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Problem using c++ library

i'm trying to use an executable file (written in c) that calls a c++ library. I'm getting this error in my Windows 2008 box: Faulting application name: sample.exe, version: 0.0.0.0, time stamp: ...
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71 views

How to keep the terminal open after executing a C program?

I'm trying to run a C program from within a python code. cmd = 'gnome-terminal --command=./myprog' subprocess.Popen(command, stdout=subprocess.PIPE, shell=True) The code executes and the terminal ...
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134 views

Geany comment block format

I'm trying to figure out where the comment block style is defined in Geany for C files. By this I mean when I select a block of text and hit ctrl-e, each line in the block of text is pre-pended (at ...
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1answer
150 views

Cannot compile C programs after deleting libc.a and libc.so

I removed libc.a and libc.so files from my Raspberry Pi. I read somewhere that it was going to fix a problem i had with the mpi.h library, but instead of that it has prevented me from compiling C ...
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50 views

Application server for C programs?

I'm writing some programs in C that will run in a distributed environment. Is there anything like an application server for C that provides clustering, monitoring, logging, etc?
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243 views

How to keep Ubuntu 11.10 and Kate editor w/terminal from changing command line when changing tabs?

I am programming C using Kate editor in Ubuntu 11.10. It works great, but when I change tabs in Kate, the terminal line changes to the file path of the tab I click on. Normally this is not a big deal ...
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161 views

View C source files (and files in other programming lanugages) in Icewasel/Firefox

How do I make C files appear in the browser's window when I navigate to them on a web page? (I use Iceweasel which should be identical to Firefox.) I don't want to download the file, not open it in ...
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145 views

How to run C project in Eclipse IDE?

I downloaded Eclipse IDE for from here and I create a sample project from here I followed steps as above link.But in code displays error in "#include" header file.how do I resolve this issue.Please ...
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523 views

How to clear orphaned watch descriptors of inotify

After creating a file descriptor by calling inotify_init() I add thousands of watches to the inotify instance(hope it is right to call that so). My questions is if my program crashes what happens to ...
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How to enable daytime service on ubuntu

I have found the following info on my machine user@ubuntu:/etc/xinetd.d$ cat daytime # default: off # description: An internal xinetd service which gets the current system time # then prints it out ...
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416 views

Getting CDT as an Eclipse plugin

I've always used Eclipse for Java development. However recently, I've wanted to add other language functionality to my favorite IDE. I got it to work with python and no I need C/C++. A search on the ...
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1answer
166 views

FFmpeg and reverb

How to FFmpeg can manage audio channels to create effects such as reverb?
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Playing a PCM file on a UNIX system

I'm trying to figure out how to use libmad with C. The trouble is, libmad converts audio files to .pcm files and I'm unable to find a way to play these files. There is no straightforward .pcm player, ...
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make a c program run without opening a cmd window [closed]

how can i make a c program run without opening a CMD window, i tried -mwindows flag, used WinMain Entry instead of main, but without results, the cmd still pop up. i tried ShowWindow function by ...
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25 views

How do I install programming info pages in Mac OS X?

I used to have a Linux system i was able to type info libc to view info pages on the C library, including unix functions. However, now I am running Mac OS X this does not work. How do I install the ...
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Access remotely two computers via IPv6 [closed]

I have a little problem on my house. Recently, I installed Teredo on two computers using sudo apt-get install miredo. Now I can access my two computer via IPv6 using Sockets in C. My goal is: I am a ...
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299 views

How to install gcc 4.4.7 on Mountain Lion

I need to install a specific version of the GNU GCC compiler, gcc 4.4.7, on my macbook, but I'm not sure how to do this. Most places I've found install later versions but I need to install that ...
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1answer
98 views

How to create an operating system on top of Ubuntu 13.10

I want create an operating system the way Mac did, building a program on top of a Unix operating system. I am planning to make a small operating system with a small amount of functions using C. I do ...
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2answers
952 views

Building GCC and Binutils on Windows 7 x64

I am trying to build GCC following the instructions in: Building GCC. At the moment I am building binutils but getting the error: * BFD does not support target x86_64-unknown-cygwin. Look in ...
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How can I get the number of threads running in a process from /proc/[pid]/stat in Linux?

I have the pid of the process. I would like to know the current number of thread running in the process. I know I can read /proc/pid/stat for this information, but I'm not sure how to specifically get ...
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466 views

How do you add RefocusIt to Gimp?

I'm trying to compile Gimp with a special plugin called Refocus-It. I know that I need to compile something. Can somebody please explain what needs to be done? I would like to accomplish this using ...
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1answer
584 views

Does stat/lstat on nonexistent file cause a disk seek?

When searching for a library file from a right folder, my application currently does couple of lstat's for the possible locationslocations. Now I'm wondering whether these lstat's (application is ...
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354 views

So I stupidly install newlib, and probably overwrote references to glibc. How can I recover glibc?

I forgot to set a make --prefix and I think it wrote to /usr/local/ by default and now I'm having all kinds of errors. I'm on ubuntu natty, what's the easiest way to resurrect glibc. I've tried to ...
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1answer
158 views

C compiler in command prompt

It is my understanding that the Windows operating system (windows 7 to be exact) must come with a C compiler because the OS is written in C. How can I access such a compiler to compile my C source ...
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4answers
254 views

Why would a compiled and linked high-level language execute slower than Assembly/machine code? [closed]

Say I compile and link C in to a flat binary or some executable output format to run on a bare machine. If I optimized and fed the direct binary to the CPU upon boot up, why would the resulted format ...
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2answers
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where's the man pages for sizeof function in c lib?

How come there's no man pages for sizeof c function ? $ man 3 sizeof No manual entry for sizeof in section 3 $ man sizeof No manual entry for sizeof I see man pages for other c functions if I do ...
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Which GUI framework is used to make Ubuntu?

I'm interested to know, Which GUI framework is used to build ubuntu? As well i know it is built in C/C++. But what GUI is used to make Ubuntu? Help would be appreciated!
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How can I know whether a binary file is an executable or a library?

I have a binary file, but how can know the file type, lib or exe. By opening it with notepad++, it shows ELF and a lot of random symbols.
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Why execute permisiions along with write permissions needed for creating file in c(Linux)?

I am trying to create a file from my c source code on linux. I am using dd command for reading from a file and writing in to a file by creating there. If i don't have execute permissions(I have write ...
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3answers
962 views

GCC won't work. problem with /usr/local/include

I was trying to add a new library/header and seem to have broken gcc. Specifically, I used the command: $ sudo cp mylib.h /usr/local/include This seems to have replaced the /usr/ directory with a ...