Questions tagged [c]

C is a general-purpose programming language

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Confused about how to compile modsecurity module for apache in Ubuntu 14

After I followed the instructions in Building Custom ModSecurity Modules section in modsecurity dev guide in order to compile mod_tfn_reverse.c using the command apxs -ca mod_tfn_reverse.c, I'm still ...
interface's user avatar
  • 171
0 votes
1 answer
103 views

How do I change the final location of a compiled c program in the terminal

After a c program is compiled it is stored in ./a.out. Is there any way in which I can change the file to any name I want?
Raghavendra Gautam's user avatar
0 votes
1 answer
189 views

How can I get my terminals / shells to have custom designs in it?

How can I add fun stuff to my terminal so I have extra zazz for when I break every thing every day! :D I'm learning C / C++ and think root projects and custom terminals would be fun way to practice ...
hansooloo's user avatar
2 votes
0 answers
289 views

Can't call gnome-screenshot in C

I want to call the command gnome-screenshot -ac in my C program using system("gnome-screenshot -ac") or exec() but they didn't work. I'm sure that this command works well because I can use it in the ...
WJNNB's user avatar
  • 21
2 votes
0 answers
994 views

Where's device file of the sound card?How can I play by C

In /dev, I just find /dev/console, rather than /dev/dsp, /dev/audio, etc., which friends told me the device file of sound card in Linux. Now, I want to play music and change the volume by C in Ubuntu ...
Hanson Jackson's user avatar
1 vote
1 answer
85 views

Help following instructions (stuck at editing a file)

I'm following these instructions. This is what I've done so far: Installed JDK Downloaded NDK & SDK, extracted them and MOVED them to usr/src Configured my $PATH Ran android and now I'm ...
Alex Wolf's user avatar
0 votes
2 answers
2k views

bash - can shellcode be made from a bash script?

I was thinking it can't, since there's not really a binary for bash scripts, but having to write a C program every time you need to generate shell code for a single command is just a pain.
user3475234's user avatar
2 votes
1 answer
2k views

SNAP Installation C++

I am new to Linux and working in its environment. I have trouble understanding and installing SNAP library for C++ on Ubuntu 14.04. I am following this tutorial. Inside the SNAP directory I run the ...
user avatar
0 votes
2 answers
1k views

gdb - load kernel module for remote debugging

Ubuntu 14.04 LTS: peter@peterubuntu0:$ insmod mymodule peter@peterubuntu0:/sys/module/mymodule/sections$ cat .text .data .bss 0x0000000000000000 0x0000000000000000 0x0000000000000000 So how do I ...
4pie0's user avatar
  • 481
1 vote
1 answer
5k views

How to open new terminal by C code?

I am using ubuntu 14.04 and Qtcreator to complile a code. I am able to run a terminal by code system("/home/salman/find_location/start_yarp.sh"); But on the next line i have system("/home/salman/...
Salman Zafar's user avatar
2 votes
0 answers
190 views

Debugging kernel running on AMD target from Intel host - how to return control to gdb?

I have compiled kernel 3.13.0-55 on Ubuntu on both AMD and Intel machines. I tried to copy compiled kernel to Intel target but it won't boot with that one. Therefore I have compiled the same version ...
4pie0's user avatar
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1 answer
102 views

error with .data file,C [closed]

I have been trying to compile a C program that receives data from a .data file.Unfortunately,I always get the following message: input.dat.2:1:error: expected identifier or "(" before numeric constant ...
user3697730's user avatar
1 vote
1 answer
57 views

How to debug a process developed in C running as a Wi-Fi Access Point?

I have two processes developed in C. The first one is running as a WiFi Access Point in Ubuntu machine and the second is running as a controller in another Ubuntu machine in the ethernet network. This ...
fati09's user avatar
  • 13
0 votes
1 answer
701 views

Is it possible to send keys to inactive window via any c/c++ library?

I'm developing a program where I need to control an inactive window by sending a couple of keys. I was wondering if there is any c/c++ library to do so on Ubuntu (and linux in general) ? I googled a ...
dhruvvyas90's user avatar
0 votes
2 answers
1k views

Difference between C programs and shell scripts receiving signals from fuser

I have written the shell script below for a lab in my college. It must look at a log file being upgraded frequently from another process and create a number of copies passed at invokation. Here is the ...
Davide Serafino's user avatar
11 votes
1 answer
2k views

Does Ubuntu automatically release memory allocated by a C program as the program terminates?

I have written a C program containing code allocating memory using the malloc() function. If I don't free up the memory using the free() function, will Ubuntu release it automatically?
ashubuntu's user avatar
  • 554
1 vote
1 answer
1k views

How to install a custom library written in C?

I want to install Stanford Portable Library on my system (Ubuntu 14.04). Can anyone please instruct me how to do it?
Snake Eyes's user avatar
3 votes
2 answers
1k views

Ubuntu Terminal: C program (or other solutions) to kill processes running on a specific port and start xampp [closed]

Can anyone help me? The program's objective is to kill the processes running on port 443 and to then start xampp automatically. What I've done: #include <stdio.h> #include <stdlib.h> ...
Dragon21's user avatar
7 votes
1 answer
1k views

How to log bash history by editing bash source?

I'm using bash-4.3.30. I need to log all my commands history on a single file. I can do that by editing the bashrc or bash_profile but I'm not going to do that. I want to play with bash source files....
Nima's user avatar
  • 71
4 votes
1 answer
4k views

How to compile programs that use term.h?

I try to compile the code below: #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <term.h> //#include "/usr/include/term.h" void clear_screen(void) { ...
pgmank's user avatar
  • 734
1 vote
1 answer
418 views

Abnormal behaviour of malloc() fuction?

I was playing around with alloc functions in my Ubuntu 14.04 64-bit, gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) and found that malloc returns memory with initializing it to zero. Which is quite weird ...
SKY's user avatar
  • 11
0 votes
1 answer
60 views

Install Ubuntu on Drive C Only

How do I install Ubuntu on Drive C only? I backed up all my data on Drive D and I'm afraid that I might lose them all.
Anthony De Vicente Lopez's user avatar
1 vote
2 answers
23k views

GCC Fatal Error

everyone Here's my problem; So, I'm new to Ubuntu and programming and I just wanted to start with C. I created the classic "hello.c" file #include <stdio.h> main () { printf("Hello ...
Luke Carter's user avatar
0 votes
1 answer
902 views

Ubuntu Kernel Source Code for NAT Firewall [closed]

In TCP Communication, when the packet is being transferred from ethernet to network(IP) layer, I want to print the data present in that packet? I am working on linux (ununtu 14.04). I got some ...
rbm's user avatar
  • 1
4 votes
1 answer
10k views

Location of USB header files for Include

I'm working on porting a Windows application to Ubuntu 14.04. The application is a host-side GUI for a USB device that uses the generic HID interface. I need to Include the header files for the ...
Pablo's user avatar
  • 41
1 vote
1 answer
4k views

How to run C program on 14.04?

I'm trying to run some C programs using Geany and Code::Blocks. After coding them, when I run them, a message is showed in the terminal like this: In Code::Blocks: sh: 1: /home/c program files/2: ...
Mr. Tripple M.'s user avatar
2 votes
1 answer
2k views

Can't compile tiny C code which uses librsvg

I am almost complete noob in linux world and I use Ubuntu 14.04 LTS with gnome-session-fallback (compiz) under VirtualBox on Windows 8.1 machine. My goal is to use this library: https://github.com/...
YuriM's user avatar
  • 23
2 votes
1 answer
5k views

Compiling C code in the terminal

I've been having a problem with compiling. I used the following test C code below and saved it as test.c in Home folder. #include <stdio.h> int main() { printf("Bruh!"); return 0; } When ...
Najib Adan's user avatar
2 votes
0 answers
3k views

Undefined reference error while using custom system call in kernel 3.19

I'm trying to import new system call in the kernel 3.19. I've followed the tutorial given here! This is my simple code to implement factorial calculation via system call. #include <linux/kernel....
Palash Karmore's user avatar
1 vote
1 answer
8k views

How do I handle a "No such file or directory" error for a header file from make?

When compiling a source package, I got an error from make that looked like: In file included from foo.c:28:0: bar.h:23:18: fatal error: bar.h: No such file or directory #include <bar.h> ...
muru's user avatar
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0 votes
1 answer
226 views

Geany no support greek language

I am using Geany for C programming. My code contains some greek sentences,I set the Default Encoding to GREEK(ISO-8859-7), but when I try to execute the program the greek letters show up like this. ...
Marvin Micek's user avatar
15 votes
2 answers
37k views

Python.h found by locate but not by GCC

I just wrote a simple C executable to check if Python.h is working or not #include<Python.h> #include<stdio.h> int main() { printf("this is a python header file included programm\n"); ...
user2738777's user avatar
0 votes
1 answer
295 views

Any c functions to simulate double click on file?

I have some .desktop files and am looking for c functions that make it as if user double clicked on the .desktop files. Here are my desktop files: https://www.youtube.com/watch?v=Yc19BzLTnDE Thanks
Noitidart's user avatar
  • 417
5 votes
2 answers
950 views

C Using Libraries Without IDE [closed]

This may be a stupid question. How do you use C libraries without an IDE? I want to only use a text editor.
Erik W's user avatar
  • 197
0 votes
1 answer
4k views

Ubuntu: "X" mark on the top-right corner of respective file icons

I am new to ubuntu/ linux. Hence, please accept my apology for asking very trivial questions. Also, I googled; but, did not find suitable answer. I installed a third party lib: Taucs (location on my ...
Garima Singh's user avatar
1 vote
1 answer
698 views

Where are the headers with IOCTL numbers for ext4?

I am looking for ext4.h, or another file that contains EXT4_IOC_*. There is nothing in /usr/include or /usr/src. I have linux-headers-generic installed. I am on Kubuntu 14.10. Where are the headers? ...
Mark Raymond's user avatar
0 votes
1 answer
9k views

fatal error: linux/err.h: No such file or directory [duplicate]

What package should install for this header (err.h) is available? I need this library (linux/err.h) to compile a proprietary driver (kernel module) in Ubuntu 14.04 Server/Desktop 64bits
Fabio C. Barrionuevo da Luz's user avatar
13 votes
2 answers
42k views

Where are header files for GCC located?

I want to manually add some header files like math.h and graphic.h for gcc but don't know where to put them.
Chirag Soni's user avatar
3 votes
1 answer
11k views

Lightweight C/C++ editor with code completion and debugging

Ever since the debugger plugin for geany stopped working (see below), I am looking for an editor for C/C++ source files with the following features: Code completion (i.e., Intellisense-like ...
Andreas Unterweger's user avatar
1 vote
0 answers
316 views

Fullscreen Detection Algorithm for lockscreen/screensaver

I'm working on a cross linux fullscreen detection algorithm, for use in detecting lock screen and screensaver. This is what I have so far: Check if _NET_WM_STATE_FULLSCREEN is supported, if it is ...
Noitidart's user avatar
  • 417
0 votes
1 answer
5k views

Using mysql in C programming [closed]

I installed ubuntu on a virtual machine.There,I installed mysql server(sudo apt-get install mysql-server) .This worked, because I could acces mysql-u root -p password. After that,I did : sudo apt-get ...
unt mazga's user avatar
2 votes
1 answer
3k views

Gnuplot - Save result

I create a graph that changes each second using gnuplot.Now, I want to save this graph as gif or png file when my program finishes. How can I do? My C code is below FILE *pipe = popen("gnuplot -...
us2956's user avatar
  • 123
2 votes
1 answer
261 views

GNU C - Signals never arrive to the handler

I'm working on a university project which needs to be written in GNU C and run on Ubuntu server. My primary OS at home is Ubuntu 14.04 on my PC. The project is about multi thread programming and I ...
MontyX's user avatar
  • 33
1 vote
1 answer
2k views

How do I open C libraries and functions implementations?

I am having a problem that I cannot browse the header files /libraries to get the implementation of the C functions like mssget, msgsnd, shmat etc. How should I open these files?
Nour Malkawi's user avatar
2 votes
1 answer
762 views

Not able to include sqlite3 in c program

I installed libsqlite3-dev from ubuntu software center and after the installation, i found the sqlite3.h file in usr/include folder. There was no error in including that header file, but i am not able ...
user3636470's user avatar
-3 votes
1 answer
2k views

C programming questions (newbie) [closed]

I read Kernighan & Ritchie C programming book now and have a few questions about 'getchar' and 'putchar'. The question is below the code example: #include <stdio.h> int main(void) { ...
Vitaliy Pisnya's user avatar
0 votes
1 answer
183 views

Which compiler i have to use to understand C behaviour exact behaviour

I am confused regarding with the c compilers. as per my knowledge for a programmer the code is not important but the internal behaviour is very important.cause if we know how the compiler behaves for ...
ashok's user avatar
  • 271
8 votes
2 answers
66k views

No such file or directory #include <string> [closed]

I wrote the program kai.c and now am trying to compile it with gcc kai.c -o kai, which returns: kai.c:5:18: fatal error: string: No such file or directory #include <string> ^ ...
qwerty's user avatar
  • 253
4 votes
1 answer
2k views

Sending different kill signals to init - how to log

I have to write a C program to check how init reacts to different kill signals, however I am not sure how to log it - for example signal number 14 crashes the ubuntu, then some higher one turns it off....
LookingForKnowledge's user avatar
0 votes
1 answer
2k views

FT_Read is not working properly [closed]

I am writing code for serial programming for serial communication between FTDI device and Desktop through XBEE. I am writing command on device for (in example) reading Battery Voltage Current and ...
keshaw's user avatar
  • 61

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