Linux is a free (libre), open source, Unix-like operating system.
3
votes
1answer
44 views
Service to keep variables in memory
I'm a beginner C programmer. I want to write a program with the following characteristics:
The program is essentially a 'daemon' or a 'service' that sits in the background doing nothing except ...
1
vote
0answers
59 views
Touchscreen Right Click
I have built a small script that provides touch screen right click context menu with long touch press in my ELAN touchscreen.
There is no need to remove your finger in order context menu to pop up.
...
3
votes
0answers
44 views
Iterating through an array once [closed]
I am tasked with writing a script that analyzes code and attaches a comment with #Loopn or #Selection n that corresponds with ...
2
votes
1answer
104 views
Keep NumLock always on in C++ on Linux
I intend to replace my bash script executing these two very same commands infinitely, for the bash script seems rather ineffective:
/usr/bin/numlockx on
...
3
votes
0answers
34 views
Linux performance using multi-threads (vs one thread) and ssh message
My server receives requests in one thread and responds in another. I am using thread pools of pthread-s for both receiving and sending. The performance is not that bad, however...
When I am doing the ...
3
votes
1answer
63 views
Countdown AppIndicator
I've decided to translate an old Unity AppIndicator I had written in C to Ruby, so I can practice coding with it (got a little bored with the completely beginner lessons I've been following, which I'...
3
votes
0answers
24 views
msysGit to Unix sockets
I wrote this small script to help porting msysGit sockets to WSL ("Bash for Windows"). I'm not a big Python programmer so any feedback would be well appreciated.
By the way, I made it a public Gist ...
3
votes
1answer
48 views
Waiting for input with timeout
When my program begins, I want to allow the user to hit a key to enter debug mode for one of the modules. Many of the solutions (involving alarm(), in particular) ...
1
vote
1answer
73 views
Simple Linux upgrade script in Bash revision 2
As I will be deploying this script on multiple machines with the very same system Linux Mint 18 with rather same configuration, I would like to be semi-sure I won't screw things up much.
This little ...
6
votes
1answer
82 views
Simple Linux upgrade script in Bash
As I will be deploying this script on multiple machines with the very same system Linux Mint 18 with rather same configuration, I would like to be semi-sure I won't screw things up much. This little ...
4
votes
2answers
61 views
Optimize text search in files with Bash
I would like to get some performance improvement suggestions to a simple project I made using Bash in Linux.
The target is to read all the *.desktop files, and ...
8
votes
3answers
249 views
Removing multiple slashes from path
I have been trying to write a sample code block to remove multiple backward or forward slashes from a path (e.g. //a//b should be ...
2
votes
2answers
51 views
Passing help options to a bash script
I used this code to give -h(help) options to my bash script. It's working fine and I wanted to get the code reviewed.
...
10
votes
2answers
162 views
mini-(Docker)-shell
I was given an assignment to write a mini-shell:
To write your own shell, you will need to start with a C program that
will prompt the user for input and accept in a number of arguments
from a ...
4
votes
2answers
39 views
Parse a substring out of string, allocate memory accordingly
I have written the following code in order to:
Find begin and end of FTP user and password from a given URL (ftp://[user[:password]@]host[:port]/url-path)
Allocate ...
3
votes
2answers
61 views
Finding duplicate files using md5sum Unix command
This is an exercise from Think Python: How to Think Like a Computer Scientist
Here's its description:
In a large collection of MP3 files, there may be more than one copy of
the same song, stored ...
1
vote
0answers
17 views
Parsing GTF file using command-line
I am extracting exons details from a GTF file using command line in Unix like cut, awk, grep or sed.
input file.gtf:
...
5
votes
1answer
45 views
Bash function that allows running user aliases with sudo on Ubuntu
I wrote this little Bash function to replace my sudo command.
It checks whether I have an alias for the given command and runs the aliased command instead of the ...
1
vote
1answer
25 views
Parse child value from XML using ezxml
I'm parsing an XML file and searching for a child value.
As I'm familiar with this XML file structure, I know that the final value is a child of a child, and so I wrote the following code section:
<...
2
votes
2answers
34 views
High CPU utilisation for Logs Manager shell script
I have written a shell script to manage the tcpdump pcap logs and syslog files in my Linux board, so as to maintain the disk usage to maximum of 70%.
The script checks for the disk usage every ...
6
votes
2answers
86 views
CPU core temperature Unity indicator
Project now on Github: https://github.com/IanCaio/TempI
I just finished a working version of a small Unity indicator in C, that is supposed to take the output of the application "sensors" (...
1
vote
1answer
18 views
Pausing script while waiting for Docker container and printing updates
I'm looking to improve it in brevity, readability, and simplicity. Basically, I'm just looking for a more elegant solution. What improvements can I make?
...
0
votes
1answer
60 views
Basic GNU/Linux C++ serial I/O class
I have wrote a small C++ class that provides some basic serial I/O functionality (it uses the standard GNU/Linux API).
At this stage is working fine, before adding new functionality I want to get ...
1
vote
2answers
55 views
Iterating over a range of dates in a shell script
I have been working on a script that can be used to automatically pull the batch ids that were processed 4 days ago and which need to be processed tomorrow on the server. The batch IDs from 3 days ago ...
2
votes
0answers
48 views
Multithreaded C program to calculate CPU usage of cgroups
I am writing a program in an environment that makes use of cgroups to identify and group processes together. I want to parse the CPU utilization of each cgroup by sampling ...
4
votes
2answers
84 views
Simple program to read memory usage by PID in Linux
I just learn a little bit about C Programming and try to create a modular program so I created simple program to read memory usage by pid(s) in Linux.
...
3
votes
1answer
59 views
Automation of application utilities on Linux
I am working on a project to automate utilities of our application on Linux.
The utilities are basically chunks of programs with specific options for specific tasks. They are run like UNIX commands. ...
1
vote
2answers
77 views
Hexdump utility in x86 NASM assembly
It's a simple hexdump that prints to stdout. I wanted to handle correctly input coming from the user typing at the terminal, this made the logic a little more complicated than just exiting after ...
6
votes
1answer
44 views
Extracting Linux configuration information using Bash and Perl
For few days I'm thinking about making my code faster and using less CPU. This code is a statusbar that runs in a loop. I'm asking because there's a lot of perl and I'm wondering if it could be done ...
4
votes
1answer
33 views
Yum Notification Script
This is a Bash script I wrote to email me when updates are available for my server. I'm new to bash programming, so I don't know if I've done this well.
...
5
votes
1answer
16 views
Script to record an inventory of a backup
This is a script designed to make an inventory file which records the
contents of a directory allowing verification that a backup has the
same data. The same script can also
A full github repo is ...
14
votes
2answers
1k views
Tetris in C, in 200 lines
I aimed at making fully functional (real) Tetris, in the shortest way possible in C. The result is a terminal game for Linux, that uses ncurses. I made it for my friend, who wanted to play it on his ...
3
votes
1answer
53 views
File shredder in x86 NASM Assembly
This is a file shredder utility that runs on Linux. It writes random bytes over the file contents, repeating this 48 times and calling sys_fsync after each pass to ...
5
votes
1answer
36 views
Program to print all evironment variables
I'm learning x86 assembly on Linux and this is the first program I wrote, so I'm looking for all kinds of ways to improve it.
...
0
votes
0answers
28 views
Check the battery's charge level and emit an alert on low/high value
The following script check constantly the battery's charge level of the user's laptop via the acpi command. When such level reach a low/high value, the script will ...
5
votes
1answer
58 views
Brightness Web Server
This is the first real program I've written in Go so have at it! I wrote it because I use a tiling window manager that doesn't have any brightness control functionality (at least not that I know of).
...
4
votes
1answer
97 views
Raspberry Pi headless server using bash and USB automounting
Revised from: Bash scripts and udev rules to handle USB auto mounting / unmounting
Tested:
Uses USB insert/remove to control a headless Raspberry Pi 3 with Raspian Jessie Lite
Changes:
Implement ...
2
votes
1answer
88 views
Bash scripts and udev rules to handle USB auto mounting / unmounting
Very new to Raspberry Pi and bash, but working on a headless server that will run a streaming app from USB audio card.
The plan is to take a USB card with settings file, and when inserted, the usb ...
5
votes
3answers
1k views
Snake game in C for Linux console
Please help me improve this code.
Move snake using : a w s d.
(My compiler doesn't support initialization of index variables inside loops, so please ignore this part)
...
8
votes
1answer
107 views
Baby-sitting bash script using DVD drive
This is the script I wrote to make an automated POC baby-sitter in 5 lines.
I first found this on a GIF or meme site and thought of making a POC script that does the same.
...
8
votes
2answers
163 views
Thread to send heartbeat UDP packets
This C code will run on an embedded machine with a Linux OS. It should create data packets (ASCII) to repeatedly be sent to a UDP server.
Just to give an overview about what functions should do:
<...
5
votes
2answers
94 views
Thread synchronization with mutex
This program prints odd numbers by thread1 and even numbers by thread2 sequentially. Can this code be optimized or made more ...
1
vote
1answer
69 views
5
votes
1answer
50 views
Bash script for xrandr modification
Simply, I call the script (brightness.sh) and pass a three character value as an argument. I've got commands to strip individual numbers for math processes, and then the final commands to apply the ...
3
votes
1answer
76 views
Template for PHP service (/etc/init.d) script
I wanted a template for a service script that is versatile and easily configurable.
Along with producing similar outputs to the SSH and Samba daemons, I request the code to be as clean, simple and ...
4
votes
1answer
45 views
Simple shell script to backup to Amazon over iSCSI
The script works but I know that it can be improved. Please note that my scripting skills are very basic :) (as it can be seen in my Frankenstein script – I took bits and pieces of the code from ...
4
votes
1answer
65 views
Bash script to determine a distro, update, upgrade and install the apps I use
This is my first bash script. I am trying to learn scripting and needed an idea. This is the first idea I came up with. When I used to distro hop I had to reinstall everything. This helped me out once ...
4
votes
1answer
91 views
Watch log dir for new file, automatically tail to slack
We have a process that outputs to log files in the format /var/log/xxx/YYYY_MM_DD.log - the file name is chosen programmatically and is not rotated using logrotate ...
0
votes
0answers
55 views
Resolving the path to a Bash script
I wrote a function to resolve the full path to the current Bash script, and I'm wondering if it's SOLID:
...
-1
votes
1answer
70 views
Measuring execution time of a simple operation
The purpose of the following code is to measure the execution time of a simple operation (1+1) and of a call to a function who does nothing (foo).
The code ...
