https://github.com/eldracode/wish

A Linux Shell written in C
https://github.com/eldracode/wish

shell

Last synced: 15 days ago
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A Linux Shell written in C

• Host: GitHub
• URL: https://github.com/eldracode/wish
• Owner: eldracode
• Created: 2019-01-28T08:49:26.000Z (almost 6 years ago)
• Default Branch: v0.1
• Last Pushed: 2020-06-22T21:42:34.000Z (over 4 years ago)
• Last Synced: 2024-08-01T15:29:59.143Z (4 months ago)
• Topics: shell
• Language: C
• Homepage:
• Size: 244 KB
• Stars: 6
• Watchers: 1
• Forks: 5
• Open Issues: 4
• Metadata Files:
  • Readme: README.md

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README

        
# wish

Minimal Linux shell written in C to study systemcalls and other POSIX concepts.\

Command expressions have the syntax: 

```

$ [./]cmd1 arg1 arg2 arg3 ... argN(sep)cmd2 arg1 arg2 

```

where (sep) is a command separator or an operator. Example - pipeline operator'|',etc.            

Some features are:

-  Supports sequential command execution 'cmd1 ;cmd2;cmd3;cmd4 && cmd5'.

-  Supports pipelines constructs 'A|B|C....' where A,B,C,... are command constructs.

-  Supports Output redirection to a file '>' , '>>'.

-  Supports File descriptor redirection.

-  Supports background process execution 'cmd &'.

-  Has it's own Finite State Machine based token generator and syntax checking functions. 

#### Running on local machine

You will need a Linux machine to run this shell.

###### Dependencies:

- gcc

- cmake

After installing dependencies,

Run the following commands:

```

$ make

```

Then an executable will be generated in ./bin/ , you can run it using

```

$ bin/wish

```

To exit the shell write `exit` or press `Ctrl+D` in the shell.

#### To be added: 

-  Shell Scripting 

-  Shell customisation