Put env util functions in separate fileinput_handling

1 files changed, 78 insertions, 0 deletions

diff --git a/src/env_utils.c b/src/env_utils.c
new file mode 100644
index 0000000..6ad5ffc
--- /dev/null
+++ b/src/env_utils.c
@@ -0,0 +1,78 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   env_utils.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dkaiser <dkaiser@student.42heilbronn.de    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/05/02 16:19:31 by dkaiser           #+#    #+#             */
+/*   Updated: 2024/05/02 16:22:34 by dkaiser          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "pipex.h"
+
+char	**get_split_path(char *envp[])
+{
+	char	*path;
+
+	while (!ft_strnstr(*envp, "PATH=", 5))
+		envp++;
+	if (!*envp)
+		return (NULL);
+	path = *envp + 5;
+	return (ft_split(path, ':'));
+}
+
+char	*get_pwd(char *envp[])
+{
+	while (!ft_strnstr(*envp, "PWD=", 4))
+		envp++;
+	if (!*envp)
+		return (NULL);
+	return (*envp + 4);
+}
+
+char	*find_in_path(char *cmd, char **path)
+{
+	char	*cur_path;
+	char	*cmd_path;
+
+	cmd_path = NULL;
+	while (*path)
+	{
+		if (cmd_path)
+			free(cmd_path);
+		cur_path = ft_strjoin(*path, "/");
+		if (!cur_path)
+			return (NULL);
+		cmd_path = ft_strjoin(cur_path, cmd);
+		free(cur_path);
+		if (!cmd_path)
+			return (NULL);
+		if (access(cmd_path, X_OK) != -1)
+			return (cur_path);
+		path++;
+	}
+	return (NULL);
+}
+
+char	*get_cmd_path(char *cmd, char **path, char *pwd)
+{
+	char	*cur_dir;
+
+	if (cmd[0] == '/')
+		return (cmd); // TODO: Maybe use duplicate instead,
+			so there will be no problem on free()
+	else if (strchr(cmd, '/'))
+	{
+		cur_dir = ft_strjoin(pwd, "/");
+		// TODO: Free on fail
+		// TODO: Maybe check if executable, else there might be a problem...
+		return (ft_strjoin(cur_dir, cmd));
+	}
+	else
+	{
+		return (find_in_path(cmd, path));
+	}
+}