core: rebuild of parsing and the execution

utils/fd.c

@@ -0,0 +1,17 @@
+#include "./utils.h"
+
+void	ft_closer(int fds[2])
+{
+	if (fds[0] > 2)
+		close(fds[0]);
+	if (fds[1] > 2)
+		close(fds[1]);
+}
+
+void	ft_add_fd(int fds[2], int fd)
+{
+	if (fds[0] == -1)
+		fds[0] = fd;
+	else
+		fds[1] = fd;
+}

utils/ft_get_executable.c

@@ -0,0 +1,74 @@
+#include "./utils.h"
+#include <unistd.h>
+
+char	*ft_get_executable_with_path(const char *name)
+{
+	char	*path;
+
+	if (access(name, F_OK) == 0)
+	{
+		ft_eprintf("minishell: %s bash: No such file or directery\n");
+		return (NULL);
+	}
+	if (access(name, X_OK) != 0)
+	{
+		ft_eprintf("minishell: %s: permission denied\n", name);
+		return (NULL);
+	}
+	path = ft_strdup(name);
+	if (path == NULL)
+	{
+		ft_eprintf("minishell: malloc failed\n");
+		return (NULL);
+	}
+	return (path);
+}
+
+char	*ft_get_executable_without_path(t_list **env, const char *name)
+{
+	char	**tab;
+	char	*paths;
+	char	*path;
+	size_t	i;
+
+	path = NULL;
+	paths = get_value_by_key("PATH", env);
+	if (paths == NULL)
+		path = "";
+	tab = ft_split(paths, ':');
+	if (tab == NULL)
+	{
+		ft_eprintf("minishell: malloc failed\n");
+		return (NULL);
+	}
+	i = 0;
+	while (tab[i] != NULL)
+	{
+		path = ft_strmerger(3, tab[i], "/", name);
+		if (path == NULL)
+		{
+			ft_eprintf("minishell: malloc failed\n");
+			break;
+		}
+		if (access(path, X_OK))
+			break;
+		free(path);
+		path = NULL;
+		i++;
+	}
+	ft_freer_tab_ultimate(1, tab);
+	if (path == NULL)
+		ft_eprintf("minishell: %s: command not found\n", name);
+	return (path);
+}
+
+char	*ft_get_executable(t_list **env, const char *name)
+{
+	char	*path;
+	
+	if (name[0] == '.' || name[0] == '/')
+		path = ft_get_executable_with_path(name);
+	else
+		path = ft_get_executable_without_path(env, name);
+	return (path);
+}

utils/utils.h

@@ -14,6 +14,8 @@
 # define UTILS_H
 # include <stdlib.h>
 # include "../libftx/libftx.h"
+# include "../data/data.h"
+# include "../env/env.h"
 
 size_t		ft_strncpy(char *dst, const char *src, size_t n);
 int			ft_is_in_quote(const char *str, size_t n);
@@ -26,5 +28,9 @@ char		**ft_split_quoted(const char *s, char c);
 void		ft_strshift(char *str, int shift);
 char		*ft_quote_remover(char *str);
 int			ft_atoi_check(const char *nptr);
+char		*ft_get_executable(t_list **env, const char *name);
+void	ft_closer(int fds[2]);
+void	ft_add_fd(int fds[2], int fd);
+
 
 #endif