smallsh

A shell written in C with a subset of features of well-known shells, such as bash.

– Provides a prompt for running commands
– Handles blank lines and comments, which are lines beginning with the # character
– Provides expansion for the variable $$
– Executes 3 commands exit, cd, and status via code built into the shell
– Executes other commands by creating new processes using a function from the exec family of functions
– Supports input and output redirection
– Supports running commands in foreground and background processes
– Implements custom handlers for 2 signals, SIGINT and SIGTSTP

Running the Shell

1. At a command prompt, cd into the project directory
2. Compile the code by entering gcc --std=gnu99 -o smallsh smallsh.c
3. Run the shell by entering ./smallsh