Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs.

learn more… | top users | synonyms

4
votes
2answers
59 views

Function to grab stdin, stdout, stderr of a child process

I've managed to create a function to pipe the stdin, stdout and stderr of a child process ...
1
vote
0answers
19 views

Basic Unix shell that displays prompt and has two simple commands [closed]

I'm writing a really basic shell for Unix in C. It displays a prompt, [almond], and it has two commands: Set Prompt and exit. I'm reading user input and passing it to a char array, then parsing it ...
4
votes
1answer
41 views

Find-grep-sed for project-wide search & replace

I always forget how to do this efficiently with Vim's arglist. Drawing inspiration from a post over at Stack Overflow, I wrote a Bash function to perform a project-wide search & replace. It does ...
8
votes
2answers
323 views

MySQL class to add user/database

I'm creating tool to add new virtualhost on UNIX-box. One of tasks is to add a new user and database to MariaDB (aka MySQL) server. In fact - this my first 'real' attempt to use OOP. Here is class, ...
4
votes
1answer
62 views

Pathname matching and listing program

This Python 3 program outputs a list of all pathnames in the filesystem that match a list of rules taken from a file. You can add and remove sets of pathnames. The original purpose was to generate ...
7
votes
1answer
49 views

Unix 'sleep' clone - unsure of safety

I decided to try making some simple clones of the various user-space Unix utilities in an effort to learn the system-specific headers and improve my C skills. The code that follows is a clone of ...
8
votes
1answer
267 views

Split large file into smaller files

I recently suggested this method for emulating the Unix utility split in Python. Is there a more elegant way of doing it? EDIT: Assume that the file chunks are too large to be held in memory. Assume ...
5
votes
2answers
1k views

Small bash script to start and stop named services

I've been working on ubuntu since many years but not quite familiar with bash scripting. My development tools involve servers like nginx and apache, the mysql database and beanstalkd. Obviously, I ...
4
votes
3answers
240 views

Clean way to get size of directory

I'm working on a Unix machine where I can't use more than vanilla Perl, and I'm using Perl5.8. This script exits with a 1 if the current directory size is smaller than 1 GB (the character after ...
4
votes
1answer
173 views

Bash Music Player

I have finally finished creating my first real project. It's just a simple music player that can provides the user with the latest music from any site (as long as it contains MP3 files) he provides ...
2
votes
1answer
50 views

ksh script comments

Could you please review my script? ...
4
votes
1answer
1k views

Implementing the 'cat' command

The options for the 'cat' command are as follows: ...
2
votes
0answers
61 views

Synchronize 3 processes with fork() [closed]

I was given the following exercise in my university: Given 3 processes: d1 - print("I"), print("D") d2 - ...
1
vote
2answers
103 views

Remove NULL / empty fields using awk

just wanted to check with you could this be done better: ...
5
votes
1answer
119 views

Portability and “dark corner” gotchas in this “watchdog” program

The following program is intended to "watchdog" a child process, and all subprocesses the child spawns. The intended behavior is: A child process (as specified on the command line) is run in a ...
2
votes
1answer
262 views

List contents of a folder using a shell script and mail the folder

I want to list the contents of a folder and mail the list using a shell script. I Came up with the following script, please let me know if it is okay: ...
2
votes
1answer
101 views

Bash script to manage multiple Java Development Kits installations

I'm writing a bash script to manage multiple JDKs, the script is very simple, you have to choose a directory when you store all the jdk's, and the script maintain ...
5
votes
2answers
84 views

Make a directory and change to it

A basic shell function to create a directory and change to it goes like this: mkcd () { mkdir "$1" && cd "$1"; } This works well in many cases but breaks ...
1
vote
1answer
506 views

How can I further optimize this Perl script for finding all unowned files and directories on Unix?

(Originally posted on Stack Overflow) Following my findings and suggestions in my other post How to exclude a list of full directory paths in find command on Solaris, I have decided to write a Perl ...