added first builtin

corrected binary execution + added echo

srcs/exec.c

@@ -0,0 +1,35 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   exec.c                                             :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: tmaze <tmaze@student.42.fr>                +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2018/11/27 15:32:29 by tmaze             #+#    #+#             */
+/*   Updated: 2018/11/27 16:36:48 by tmaze            ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "minishell.h"
+
+#define S_BIN	1
+
+int	exec_cmd(char **argv, char **env)
+{
+	size_t				i;
+	static t_builtin	builtins[S_BIN] = {{"echo", &cmd_echo}};
+
+	/* ,{"cd", &cmd_cd}, */
+	/* 	   {"setenv", &cmd_senv},{"unsetenv", &cmd_senv}, {"env", &cmd_env}}; */
+
+	i = 0;
+	while (i < S_BIN)
+	{
+		if (ft_strcmp(argv[0], builtins[i].cmd) == 0)
+			return ((*(builtins[i].f))(argv, env));
+		i++;
+	}
+	execve(argv[0], argv, env);
+	ft_putendl("minishell: error");
+	return (1);
+}