# Minishell

## Allowed Functions

/*
 * This file lists the functions and system calls used in the minishell project.
 * 
 * Functions and system calls:
 * - readline: Reads a line from the terminal.
 * - rl_clear_history: Clears the history of lines read.
 * - rl_on_new_line: Prepares for a new line of input.
 * - rl_replace_line: Replaces the current line with a new one.
 * - rl_redisplay: Redisplays the current input line.
 * - add_history: Adds a line to the history.
 * - printf: Prints formatted output to stdout.
 * - malloc: Allocates memory dynamically.
 * - free: Frees dynamically allocated memory.
 * - write: Writes data to a file descriptor.
 * - access: Checks a file's accessibility.
 * - open: Opens a file.
 * - read: Reads data from a file descriptor.
 * - close: Closes a file descriptor.
 * - fork: Creates a new process.
 * - wait: Waits for a child process to change state.
 * - waitpid: Waits for a specific child process to change state.
 * - wait3: Waits for a child process to change state with resource usage statistics.
 * - wait4: Waits for a specific child process to change state with resource usage statistics.
 * - signal: Sets a signal handler.
 * - sigaction: Examines and changes a signal action.
 * - sigemptyset: Initializes an empty signal set.
 * - sigaddset: Adds a signal to a signal set.
 * - kill: Sends a signal to a process.
 * - exit: Terminates the calling process.
 * - getcwd: Gets the current working directory.
 * - chdir: Changes the current working directory.
 * - stat: Gets file status.
 * - lstat: Gets file status, not following symbolic links.
 * - fstat: Gets file status of an open file descriptor.
 * - unlink: Deletes a name from the filesystem.
 * - execve: Executes a program.
 * - dup: Duplicates a file descriptor.
 * - dup2: Duplicates a file descriptor to a specific value.
 * - pipe: Creates a pipe.
 * - opendir: Opens a directory stream.
 * - readdir: Reads a directory entry.
 * - closedir: Closes a directory stream.
 * - strerror: Returns a string describing an error number.
 * - perror: Prints a description of the last error.
 * - isatty: Tests if a file descriptor refers to a terminal.
 * - ttyname: Returns the name of the terminal associated with a file descriptor.
 * - ttyslot: Returns the index of the current user's terminal.
 * - ioctl: Manipulates the underlying device parameters of special files.
 * - getenv: Gets an environment variable.
 * - tcsetattr: Sets the parameters associated with the terminal.
 * - tcgetattr: Gets the parameters associated with the terminal.
 * - tgetent: Loads a terminal entry from the termcap database.
 * - tgetflag: Gets a boolean entry from the termcap database.
 * - tgetnum: Gets a numeric entry from the termcap database.
 * - tgetstr: Gets a string entry from the termcap database.
 * - tgoto: Computes a cursor movement string.
 * - tputs: Outputs a string with padding.