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srcs/execution/exec_cmd.c

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+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   exec_cmd.c                                         :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: lderidde <lderidde@student.s19.be>        +#+  +:+       +#+         */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/02/12 10:00:08 by lderidde          #+#    #+#             */
+/*   Updated: 2025/02/12 10:00:08 by lderidde         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "../../includes/exec/exec.h"
+
+int	count_cmds(t_ast_n **pline)
+{
+	int	i;
+
+	i = 0;
+	if (!pline || !*pline)
+		return (0);
+	while (pline[i])
+		i++;
+	return (i);
+}
+
+char	*find_path(char *cmd, char **env)
+{
+	char	*tmp;
+	char	*path;
+	char	**paths;
+	int		i;
+
+	if (access(cmd, F_OK) == 0 && access(cmd, X_OK) == 0)
+		return (cmd);
+	i = 0;
+	while (env[i] && ft_strnstr(env[i], "PATH=", 5) == NULL)
+		i++;
+	if (!env[i])
+		return (NULL);
+	paths = ft_split(env[i] + 5, ":");
+	i = -1;
+	while (paths[++i])
+	{
+		tmp = ft_strjoin(paths[i], "/");
+		path = ft_strjoin(tmp, cmd);
+		free(tmp);
+		if (access(path, F_OK) == 0)
+			return (free_tab(paths), path);
+		free(path);
+	}
+	free_tab(paths);
+	return (NULL);
+}
+
+void	return_error(char *arg, char *msg, int code, t_ast_n *node)
+{
+	ft_fprintf(2, "%s: %s\n", arg, msg);
+	free_child(node->msh);
+	exit(code);
+}
+
+int	exec(t_ast_n *node)
+{
+	char	*path;
+
+	expand_node(node);
+	path = find_path(node->cmd, node->msh->env);
+	if (!path)
+		return_error(node->cmd, "command not found", 127, node);
+	if (access(path, X_OK) != 0)
+		return_error(path, "Permission denied", 126, node);
+	if (execve(path, node->args, node->msh->env) == -1)
+	{
+		free_child(node->msh);
+		perror("execve");
+		exit(1);
+	}
+	return (0);
+}
+
+int	exec_scmd(t_ast_n *node)
+{
+	pid_t	pid;
+	int		status;
+
+	if (is_builtin(node->cmd))
+		return (exec_builtin(node));
+	else
+	{
+		pid = fork();
+		if (pid == 0)
+			exec(node);
+		else if (pid > 0)
+		{
+			waitpid(pid, &status, 0);
+			if (WIFEXITED(status))
+				return (WEXITSTATUS(status));
+			else
+				return (1);
+		}
+		else
+			perror("fork");
+		return (1);
+	}
+}