Welcome to SWiSH
A modified Linux Styled C-Shell

Extract the .tar.gz file and then:

$ make
$ ./shell

Main Files :

main.c containing driver code

execute.c containing the the code required to properly tokenize the input commands and calling the appropriate function based on the entered input

globals.h including all globals required throughout the implementation of shell.

headers.h including all the libraries required for proper functioning.

General Assumptions: Unreasonably large input path should not be given.Reasonable commands executed at a time and each command should be of reasonable length.

Specification 1,2 : prompt , cd , echo , pwd

Files :
cd.c cd.h

echo.c echo.h

pwd.c pwd.h

Specification 3: ls

Files :
ls.c ls.h

Handles ls command printing all files/sub-directories

Colors implemented:
Directory : (blue)
Executables : (green)
Archive Files : (red)
Image files : (magenta)

Specification 4, 6: Foreground / Background processes

Files :
fg.c fg.h

Shell able to run multiple foreground and background processes, and not just one. Running pinfo on each of these works as well.

Assumption : It is expected that the user enters a space between the time argument of the sleep function and the & operator differentiating this process from the other commands in the same line.
In case of multiple processes in command-line , sometimes the ending signal will printed in the command prompt bar and user will have to enter the enter button to start a new-line of command argument.
For multiple sleep commands running in foreground : The program prints the time taken by sleep command entered in the last.

Example Input
Here the user needs to press the enter button to start a new-line of commands. 

Specification 5: pinfo

Files :
pinfo.c pinfo.h

Prints the process info of the given pid (current process if none is given)

Specification 7: discover

Files :
discover.c discover.h

For reasonable and sound input this command lets the user to search for files recursively in all the sub-folders of the given folder and returns the location of the entered file , handling flags such as -d (only directories) and -f (only files) too , hence emulating the idea of the find functionality in actual linux terminal.
Hidden folders would not be searched for any input file.

Specification 8: history

Files :
history.c history.h history.txt

Adds a command to a history log (here history.txt) storing the commands entered by the user (only when the previous command entered was not equal to the current command).
The log stores the latest 20 unique commands entered by the user.
Whenever history command is called , the latest 10 are printed.When the commmands stored in the log exceeds 20 , we pop the oldest command out of the log and push the latest command into the log.

Assignment - 3

Specification 1: I/O Redirection

Specification 2: Command Pipelines

Specification 3: I/O Redirection within command pipelines

Specification 4: User-defined commands

Specification 5: Signal Handling

Specification 6: Autocompletion

Spec 1,2,3 included in execute.c pipe.c

File with function to execute piped commands.
<, >, >> and | will always have their special meanings and will be used correctly. This means that for I/O redirection, a file will always come after the arrow. Similary, a command will always come after a pipe.

Spec 4,5,6 
Earlier int main made void mainfunc() and autocomplete main is the now new int main()

For spec-4 Files : jobs.c sig.c fgjobs.c bgjobs.c

For spec-5 Files : All signals handled in fg.c and mainfunc.c
Assumption : Ctrl-c , ctrl-z wont work after multiple fg jobs call as W_UNTRACED

For spec-6 Files : main.c
Assumption : For folders , autocomplete works under current directory folders only.

Made with ♥ by Swayam !