Project Created by: Dillon Earl Jones, Wesley Glover, Bikram Dahal, Aman Dhakal

Responsibilities: Dillon Earl Jones

• cd
• SIG Catching Wesley Glover
• history
• piping Aman Dhakal
• exit
• alias Bikram Dahal
• path
• I/O Redirection

How to Compile the Program

1. Ensure you are in the directory of all the c files
2. Use the make command to compile the project

How to Run the Program (Interactive Mode)

1. Type "./major2" in the terminal while in the directory after compiling

How to Run the Program (Batch Mode)

1. Type "./major2 [batch file name]" in the terminal while in the directory after compiling

or

1. While within the programs interactive mode type "newshell [batch file name]"
      - If no path is given with the batch file name then its assumed to be in
      the same directory as all the c files.
      - The newshell command does not require the shell to be in the same directory
      as the c files or the batch file

How to Clean the Program

1. Type make clean in the terminal while in the directory after compiling

What Works * cd functionality is implemented properly (Dillon Jones) * Directories separated by spaces just need to be passed to the cd command with no quotes * cd when passed alone sends user to home directory * Sig handling handles all signals (Dillon Jones) * Parent process ignores ^C, ^Z * ^D will exit the process * History (Wesley Glover) * Called by the myhistory command * -c will clear command history * -e will execute a command from the history * will print usage if you do not put something after the flag * Piping works for up to 2 pipes with 3 commands (Wesley Glover) * EX: cat out.txt | sort -r | uniq * EX: cat out.txt | sort -r * Allows commands to have argumnets surrounded by apostrophe * EX: ps -ef | grep systemd | awk '{ print $2 }' * Note: If there is a command with apostrphes then the rest of the arguments in that command need apostrophes. * EX: ps -ef | grep systemd | awk '{ print $2 }' '{ print $3 }' // This may not be an actual function that works, just an example. * The shell will eat empty commands (Dillon Jones) * EX: $ ; ; ; * EX: $
* Will just print the prompt again and continue * Works with commands separated by semicolons (Dillon Jones) * EX: $ echo hello; ls; cat file1; * Exit works using the exit command (Aman Dhakal) * Alias command works only for one iteration AFTER a command has be aliased (Aman Dhakal) * EX: alias zom='ls' * This creates an alias for ls called zom * Added Features (Wesley Glover) * See added features section

What Doesn't Work * Exit does not support multi-commands (Aman Dhakal) * $ exit; ls; echo hello; * This command will exit before running the commands afterwards * Alias (Aman Dhakal) * Doesn't allow for multiple set aliases * Only allows for removal of a alias if it already existed * PATH (Bikram Dahal) * In/Out Direction (Bikram Dahal)

Known Problems * Alias (Aman Dhakal) * Will segfault if there are no current alias set and you try to remove one * Will segfault if a set alias is used once and then a remove of the alias is attempted

Added Features * Color Custimaziation of the Prompt (Wesley Glover) * Colors Supported * RED * GREEN * BLUE * MAGENTA * CYAN * YELLOW * EX: color user red * This makes the username in the prompt red * EX: color directory magenta * This makes the directory in the prompt magenta * Custimization of the Username (Wesley Glover) * You can change the username of the prompt * EX: username group10 * This command would change the prompt username to group10