Functions for initializing the shell's main data structure. More...

#include "minishell.h"

Include dependency graph for init_shell.c:

Functions
t_environ_list *	empty_environ (t_environ_list *environ)
	Initializes environment variables for an empty environment.

t_environ_list *	init_environ (char **envp)
	Initializes the environment variables linked list.

t_shell *	init_shell (char **envp)
	Initializes the main data structure (shell environment).

void	lvl_up (t_shell *shell)
	Increases the shell level (SHLVL) environment variable.

Detailed Description

Functions for initializing the shell's main data structure.

Function Documentation

◆ empty_environ()

t_environ_list * empty_environ ( t_environ_list * environ )

Initializes environment variables for an empty environment.

Initializes environment variables for an empty environment, such as adding the "PWD" and "SHLVL" variables to the provided environment variables linked list.

Parameters

[in] environ A pointer to the environment variables linked list.

Returns: A pointer to the updated environment variables linked list, or Null in case of failure to obtain CWD.

◆ init_environ()

t_environ_list * init_environ ( char ** envp )

Initializes the environment variables linked list.

Initializes a linked list to store environment variables based on the provided 2D array of environment variables.

Parameters

[in] envp A 2D array of environment variables.

Returns: A pointer to the initialized environment variables linked list, or NULL in case of memory allocation failure.

◆ init_shell()

t_shell * init_shell ( char ** envp )

Initializes the main data structure (shell environment).

Starts the process of initializing the shell's main data structure, which includes components such as the environment variables in a linked list and other relevant information.

Parameters

[in] envp A 2D char array of environment variables.

Returns: A pointer to the initialized main data structure (shell environment).

◆ lvl_up()

void lvl_up ( t_shell * shell )

Increases the shell level (SHLVL) environment variable.

Increments the value of the shell level (SHLVL) environment variable. If the variable doesn't exist, it is added with a value of 1.

Parameters

[in,out] shell A pointer to the shell data structure.