Fuji Shell (Fuji) is a simple command line shell for OS X and Linux. Fuji includes most basic features present in the bash shell. This shell was built as a project for Holberton School.
Fuji works like any other shell, like bash or zsh.
Fuji builds successfully with a GCC 4.8.8 compiler or later. Fuji can compile using gcc 4.8.4 -Wall -Werror -Wextra -pedantic *.c -o fuji_shell.
To start up Fuji, simply type
./fuji_shell
in the terminal.
Like other shells, Fuji is used by given it commands. Every Fuji command follows the same general syntax: command name {arguments}. The command is executed by writing the name of the command followed by any arguments.
echo Hello Fuji
Above will run the echo command, which will write its arguments Hello Fuji to the standard output.
For more information on echo, you can use the man command. The man command displays a manual page of a given command, system call, libraries, and important files.
man echo
The hsh shell also provides various builtins, commands built into the hsh shell itself. For more information on specific builtins, you can use the help command, which provides a similar manual for the specific builtin.
Any program in your computer can be used as a command in Fuji by typing the filename, provided the program is located in any of the directories in the [PATH - link include]. Otherwise, a full path to the program is required.
/Desktop/Holberton/_echo Hello Holberton
Commands and any arguments are seperated by a ' ' . Commands are read and executed from left to right and end with a newline (i.e Return Key).
echo Hello Holberton
Switches and flags arguments of commands are also supported by Fuji. Most switches start with a hypen, - For example, when a user inputs:
ls -l
The ls commands lists all directories and files in the current working directory. However, including the flag -l , will list all files and directories in long format.
cat - concatenate and print files to standout output
cp - copy files to another file
grep - searches a file for a specified pattern
less - allows backward moveement in the file as well as foward movement
ls - lists all files and directories of current working directory
mv - moves one file into another file
pwd - prints out the current working directory
There are several builtins programmed into the Fuji. Below is a description and use for each builtin.
To print out a list of all the environmental variables, the builtin env can be used. Each environmental variable and its value is printed out with a syntax of key=value. Each variable is separated by a new line.
env
To exit out of the shell, the user may use the exit builtin.
exit
To exit out of a process or command, ctrl c is used. Control-C interrupts a process and causes it to abort.
To exit out of the fuji shell, the user can do one of the following, ctrl D or exit . When exiting with ctrl D, an exit status of 0 is given.