main.c File Reference

Shell entry point. More...

#include <readline/readline.h>
#include <readline/history.h>
#include "libft.h"
#include "get_next_line.h"
#include "signals.h"
#include "token.h"
#include "parser.h"
#include "ast.h"
#include "executor.h"
#include "env.h"
#include "minishell_ui.h"

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Detailed Description

Shell entry point.

Definition in file main.c.

Functions
static int	process_input (char *input, t_shell *shell)
	tokenize -> expand -> parse -> execute More...
static char *	read_input (t_shell *shell)
	Read 1 line of input from the user. More...
static void	handle_input (char *input, t_shell *shell)
	Filter and dispatch input to processing. More...
static void	main_loop (t_shell *shell)
	Main REPL (standard mode) More...
int	main (int ac, char **av, char **envp)
	Entry point. More...

Function Documentation

process_input()

static int process_input ( char *  input, t_shell *  shell  )

static

tokenize -> expand -> parse -> execute

On any stage failure, cleans up and returns an error status

Parameters

input	Raw input string
shell	Shell context

Returns

Exit status of the executed command or 2 on parse error

Note

Heredocs are collected before the execution begins

Definition at line 35 of file main.c.

References collect_heredocs(), t_shell::current_ast, executor(), expand_all_tokens(), free_ast(), free_token_list(), parse(), and tokenize().

Referenced by handle_input().

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read_input()

static char* read_input ( t_shell *  shell )

static

Read 1 line of input from the user.

Uses readline with a prompt in interactive mode and get_next_line() otherwise (strips the trailing \n)

Parameters

shell

Shell context

Returns

Newly allocated input line or NULL on EOF

Definition at line 72 of file main.c.

References t_shell::interactive.

Referenced by main_loop().

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handle_input()

static void handle_input ( char *  input, t_shell *  shell  )

static

Filter and dispatch input to processing.

• Skips empty and whitespace only inputs
• Adds non empty input to readline history in interactive mode

Parameters

input	Raw input string
shell	Shell context

Definition at line 98 of file main.c.

References t_shell::exit_status, t_shell::interactive, and process_input().

Referenced by main_loop().

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main_loop()

static void main_loop ( t_shell *  shell )

static

Main REPL (standard mode)

setup signals -> read input -> handle SIGINT -> process

• On EOF (NULL input) it prints "exit" in interactive mode & breaks
• It frees input after each iteration

Parameters

shell

Shell context (the running flag controls the loop)

Definition at line 123 of file main.c.

References t_shell::current_input, t_shell::exit_status, g_signal, handle_input(), t_shell::interactive, read_input(), t_shell::running, setup_execution_signals(), and setup_interactive_signals().

Referenced by main().

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main()

int main	(	int	ac,
		char **	av,
		char **	envp
	)

Entry point.

Initializes the shell state and eithers enters UI mode (–ui flag) or the standard REPL.

• Cleans up env and GNL on exit.

Parameters

ac	Argument count
av	Argument vector (–ui triggers UI mode)
envp	Environment passed by the OS

Returns

The shell's final exit status

Definition at line 163 of file main.c.

References t_shell::env, t_shell::exit_status, free_env_list(), init_env(), t_shell::interactive, t_shell::is_child, main_loop(), run_ui_mode(), t_shell::ui, and t_shell::ui_mode.

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