All Questions
28
questions
1
vote
1
answer
135
views
Shell implementation in C
I made a small shell implementation in C.
It reads stdin and executes the command. It can also take in a file name from argv and execute all the arguments in the ...
- 119
3
votes
1
answer
210
views
C implementation of a minimal shell
I wrote a program that implements a minimal shell and reads from standard input commands and executes them.
Is my implementation ok? I admit that I helped myself a lot with google. Could I have ...
- 449
3
votes
2
answers
115
views
Is this implementation of the `mv` command the most appropriate? It can be improved?
I wrote a program that implements the same function as the mv command.
I know this is not the best implementation, so I would like some suggestions for improvement, ...
- 449
6
votes
4
answers
380
views
Interactive shell for Arduino
Goal
I needed to interact with microcontrollers (ESP8266 & ESP32) via the Serial interface, so I wrote a small interactive shell with the command pattern.
The defined commands can either accept no ...
- 3,960
7
votes
1
answer
2k
views
Parsing and Simple Shell in C
I wrote this simple shell in C for a university assignment on operating systems
(My guess is that it's just the beginning and the next assignments will add to this code).
The program prints the prompt ...
- 301
2
votes
1
answer
49
views
Portable Build System for Virtual Machine with Editor and Unit Tests
I am automating the building and unit testing of a personal
project using shell scripts
, CMake and make on the latest version of Fedora Linux. I have also tested building on the latest version of ...
- 22.1k
3
votes
1
answer
44
views
Check shell programs for portability
There are lots of shell programs that have /bin/sh as interpreter, yet use some features that are specific to bash or other popular shells. I have written a little ...
- 21.1k
18
votes
2
answers
2k
views
Yet another shell in C
I wrote this shell in C about a semester ago for a university assignment on operating systems. Even though I got a score of 10/10 in this assignment, I doubt it deserved it -
The pipeline ...
user151056
7
votes
1
answer
744
views
Basic shell in C
I'm new to C and created this shell to test my knowledge. It takes input from stdin, checks whether the full path has been given, if not, appends input to /bin/ and then executes. How can I improve; ...
- 135
3
votes
1
answer
145
views
Command manipulation functions for a toy shell program
I am writing a small program that is supposed to act as a shell of some sorts. It operates off of a few basic structures, one of them being a command, a ...
- 31
10
votes
2
answers
308
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 ...
- 21.8k
2
votes
1
answer
295
views
Parsing and executing a simple shell script
I'm writing a simple shell and want to parse and execute a simple shell script.
...
- 1,837
-1
votes
1
answer
84
views
More error-checking
The purpose of this code is to check for errors in my code for a custom shell.
In a previous answer, they say that my code didn't have error-checking.
You need to check the result of every ...
- 1,837
2
votes
1
answer
338
views
POSIX arithmetic expansion
I understand that a shell should be able to perform arithmetic expansion. My shell can do it:
$ echo $((1+2*3+4*5))
27
My solution uses the lemon parser where I ...
- 1,837
3
votes
1
answer
303
views
Running shell commands in a pipeline
I'm writing a shell in C for Linux and BSD. My code was unreadable before but I did a rewrite and now it is much more readable. The purpose of the code is to create a command pipeline and execute it.
...
- 1,837
-4
votes
1
answer
77
views
Creating a struct
Mat told me to create a struct
create a struct for the individual commands and arguments. It should
have something like the "executable" name, number of args and arg
list. Create a few ...
- 1,837
2
votes
2
answers
968
views
Shell command-line interpreter with pipeline parsing
Like many others I've been writing a shell command-line interpreter that can do a pretty decent pipeline parsing, first it splits the command at pipeline char (|), then it splits the substring at ...
- 1,837
2
votes
1
answer
130
views
C main function for POSIX shell
I got a pretty large main function that I want to break up in smaller helper functions. Can you help me suggest what to break out into helper functions? The ...
- 1,837
0
votes
1
answer
51
views
Handle builtin commands
I've written a small C function to handle the builtin commands of a custom shell that I'm writing in C. Is it better to use a switch instead?
...
- 1,837
0
votes
1
answer
3k
views
Tokenizing a shell command
I want to handle input like the following
ls -al | awk '{print $1}'
Now to parse it I couldn't tokenize at whitespace because of the quotations and I had to make ...
- 1,837
2
votes
2
answers
1k
views
Basic shell implementation
Here is a small project to implement a basic shell. It is a personal ongoing project to keep system call usage fresh. It currently does background processes and some basic signal handling.
I am ...
- 116
5
votes
1
answer
379
views
Constructing a simple shell from scratch
I'm actually doing my whole shell in C from scratch from a Linux computer.
The thing is that I think we all do our best from creating the simplest things that can be explained easily. And I'm not sure ...
4
votes
2
answers
593
views
A basic C Shell for Linux
I have written a basic C Shell. It features the builtins cd, programmer, ver and ...
user69731
8
votes
2
answers
252
views
Recovery Shell (rsh)
I wrote a shell to test my understanding of processes etc. It is not supposed to comply with POSIX or anything, just to allow people to run simple commands with simple arguments.
...
user73265
7
votes
1
answer
148
views
Restrictive stupid shell
I'm attempting to create a replacement shell for /bin/bash, that only permits commands defined by a read only config file. These commands will be run by absolute paths, and take no arguments. I'm not ...
- 153
2
votes
1
answer
865
views
Very basic shell on microcontroller in C - follow-up
This is a follow-up of: Very basic shell on microcontroller in C
A few days back I've asked for a review on a simple shell parser in c. Based on the answers, I've restructured my code to use a table-...
- 258
6
votes
2
answers
2k
views
Very basic shell on microcontroller in C
Objective: A lightweight shell that runs on a microcontroller (MSP430) and parses incoming data into a command and additional
parameters.
Requirements:
Support of quoting in ...
- 258
7
votes
3
answers
29k
views
Simple shell in C [closed]
I am just getting started with C and made this simple shell to test my understanding of some basic principles. The shell reads commands from standard input, forks itself and executes the command. How ...
- 89