unset_builtin.c File Reference

Builtin function for the "unset" command in the minishell project. More...

#include "minishell.h"

Include dependency graph for unset_builtin.c:

Functions
void	delete_variable (t_shell *shell, char *arg)
	Deletes an environment variable.
void	unset_arg (t_shell *shell, char *arg, int *fails)
	Unsets an environment variable or prints an error message.
int	unset (t_shell *shell, char **args)
	Executes the "unset" command to remove environment variables.

Detailed Description

Builtin function for the "unset" command in the minishell project.

This file contains the implementation of the unset builtin function for the minishell project. The unset command is used to remove environment variables based on the provided arguments.

Function Documentation

delete_variable()

void delete_variable	(	t_shell *	shell,
		char *	arg
	)

Deletes an environment variable.

This function deletes an environment variable specified by its name (arg) from the shell's environment linked list. It finds the variable to delete and removes it from the linked list, freeing the associated memory.

Parameters

[in,out]	shell	A pointer to the shell struct.
[in]	arg	The name of the environment variable to delete.

unset()

int unset	(	t_shell *	shell,
		char **	args
	)

Executes the "unset" command to remove environment variables.

This function processes the "unset" command and removes the specified environment variables based on the provided arguments. It returns EXIT_SUCCESS on success or EXIT_FAILURE if any errors occurred.

Parameters

[in,out]	shell	A pointer to the shell struct.
[in]	args	An array of strings containing the arguments.

Returns

An exit status (EXIT_SUCCESS on success, or EXIT_FAILURE on failure).

unset_arg()

void unset_arg	(	t_shell *	shell,
		char *	arg,
		int *	fails
	)

Unsets an environment variable or prints an error message.

This function unsets an environment variable specified by its name (arg) if it's a valid identifier (starts with an alphabetic character or '_'). If the identifier is not valid, it prints an error message and increments the failure count.

Parameters

[in,out]	shell	A pointer to the shell struct.
[in]	arg	The name of the environment variable to unset.
[in,out]	fails	A pointer to the failure count.