Functions for preparing the t_executor linked list, used by the executor. More...

#include "minishell.h"

Include dependency graph for prep_executor.c:

Functions
int	get_size_executor (t_lexer_list *head)
	Calculates the number of t_executor elements/nodes needed.

t_executor *	create_executor_list (int size)
	Create a linked list of t_executor nodes/elements.

void	set_executor_defaults (t_executor *node)
	Sets default values for a t_executor node.

t_executor *	init_executor_list (int size)
	Initializes the t_executor linked list.

t_executor *	prepare_executor (t_shell *shell)
	Prepare a linked list of t_executor elements for the executor.

Detailed Description

Functions for preparing the t_executor linked list, used by the executor.

Function Documentation

◆ create_executor_list()

t_executor * create_executor_list ( int size )

Create a linked list of t_executor nodes/elements.

Allocates memory for a linked list of t_executor nodes, based on the size.

Parameters

size	The size of the t_executor linked list.

Returns: A pointer to the linked list, or NULL if allocation fails.

◆ get_size_executor()

int get_size_executor ( t_lexer_list * head )

Calculates the number of t_executor elements/nodes needed.

Calculates the number of t_executor elements/nodes needed based on the number of pipe token in the lexer linked list. Each pipe token represents a new t_executor node. Example: 2 pipe token -> 2 + 1 t_executor nodes.

Parameters

head	A pointer to the head of the lexer linked list.

Returns: The size of the t_executor linked list.

◆ init_executor_list()

t_executor * init_executor_list ( int size )

Initializes the t_executor linked list.

Initializes the t_executor linked list, by first calling create_executor_list() to allocate memory for it. It sets every nodes id and overall size, then calls set_executor_defaults() for setting default values.

Parameters

size	The amount of nodes in the t_executor linked list.

Returns: A pointer to the initialized t_executor linked list, or NULL on error.

◆ prepare_executor()

t_executor * prepare_executor ( t_shell * shell )

Prepare a linked list of t_executor elements for the executor.

Prepares a linked list of t_executor elements by calculating the number of elements needed, initializing them and filling them with the relevant data from the lexer linked list and the environ linked list.

Parameters

shell A pointer to the main data structure.

Returns: A pointer to the t_executor linked list, or NULL on error.

◆ set_executor_defaults()

void set_executor_defaults ( t_executor * node )

Sets default values for a t_executor node.

Initializes the variables of a t_executor node with default values. They include filediscriptors and bools.

Parameters

node	A pointer to the t_executor node to initialize.