1 files changed, 90 insertions, 0 deletions
diff --git a/src/interpreter.c b/src/interpreter.c
new file mode 100644
index 0000000..c6a4a00
--- /dev/null
+++ b/src/interpreter.c
@@ -0,0 +1,90 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   interpreter.c                                      :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: chuhlig <chuhlig@student.42.fr>            +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/08/05 13:15:24 by dkaiser           #+#    #+#             */
+/*   Updated: 2024/10/25 20:59:16 by chuhlig          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "debug_tools.h"
+#include "minishell.h"
+#include <stdlib.h>
+#include <sys/_types/_pid_t.h>
+#include <sys/cdefs.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+static int	eval_rec(t_node *node, t_env *env, int in_fd);
+
+int	eval(t_node *node, t_env *env)
+{
+	pid_t	pid;
+	int		result;
+
+	if (node == NULL)
+		return (EXIT_FAILURE);
+	result = 0;
+	pid = fork();
+	if (pid < 0)
+	{
+		return (EXIT_FAILURE);
+	}
+	if (pid == 0)
+	{
+		result = eval_rec(node, env, STDIN_FILENO);
+		exit(result);
+	}
+	else
+	{
+		waitpid(pid, &result, 0);
+	}
+	return (result);
+}
+
+static int	eval_rec(t_node *node, t_env *env, int in_fd)
+{
+	pid_t	pid;
+	int		result;
+	int		p[2];
+
+	result = pipe(p);
+	if (result == -1)
+		return (EXIT_FAILURE);
+	if (node->type == PIPE_NODE)
+	{
+		pid = fork();
+		if (pid < 0)
+		{
+			return (EXIT_FAILURE);
+		}
+		if (pid == 0)
+		{
+			close(p[0]);
+			dup2(in_fd, STDIN_FILENO);
+			dup2(p[1], STDOUT_FILENO);
+			result = execute_cmd(&node->content.pipe.left->content.cmd, env);
+			exit(result);
+		}
+		else
+		{
+			close(p[1]);
+			dup2(p[0], STDIN_FILENO);
+			result = eval_rec(node->content.pipe.right, env, p[0]);
+		}
+	}
+	else if (node->type == CMD_NODE)
+	{
+		result = execute_cmd(&node->content.cmd, env);
+	}
+	else
+	{
+		panic(UNREACHABLE);
+		return (EXIT_FAILURE);
+	}
+	return (result);
+}
+