diff --git a/Makefile b/Makefile
index 635e9c8..9898526 100644
--- a/Makefile
+++ b/Makefile
@@ -22,6 +22,7 @@ srcs = \
 	src/env_get.c \
 	src/env_manip.c \
 	src/env_manip_utils.c \
+	src/ft_errno.c \
 	src/parser/matchers/metacharacter.c \
 
 objs = $(srcs:.c=.o)
diff --git a/src/ft_errno.c b/src/ft_errno.c
new file mode 100644
index 0000000..94ef2a3
--- /dev/null
+++ b/src/ft_errno.c
@@ -0,0 +1,69 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_errno.c                                         :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: khais <marvin@42.fr>                       +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/02/19 12:53/26 by khais             #+#    #+#             */
+/*   Updated: 2025/02/19 12:53:26 by khais            ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "ft_errno.h"
+#include "libft.h"
+#include <stdio.h>
+#include <unistd.h>
+
+/*
+** get or set ft_errno
+**
+** if errno is FT_EGET, return ft_errno and do not set it
+**
+** else set ft_errno to errno, and return the previous value of ft_errno
+*/
+t_errno	ft_errno(t_errno errno)
+{
+	static t_errno	ft_errno = FT_ESUCCESS;
+	t_errno			ft_errno_backup;
+
+	if (errno != FT_EGET)
+	{
+		ft_errno_backup = ft_errno;
+		ft_errno = errno;
+		return (ft_errno_backup);
+	}
+	return (ft_errno);
+}
+
+/*
+** get the current value of ft_errno
+*/
+t_errno	ft_errno_get(void)
+{
+	return (ft_errno(FT_EGET));
+}
+
+char	*ft_strerror(t_errno errno)
+{
+	static char	*strs[] = {
+	[FT_ESUCCESS] = "Success",
+	};
+
+	if (errno >= 0 && errno < FT_EMAXERRNO)
+		return (strs[errno]);
+	return ("Invalid error code");
+}
+
+t_errno	ft_perror(char *desc)
+{
+	if (ft_errno_get() == FT_EERRNO)
+		perror(desc);
+	else
+	{
+		if (desc != NULL && desc[0] != '\0')
+			ft_dprintf(STDERR_FILENO, "%s: ", desc);
+		ft_dprintf(STDERR_FILENO, "%s\n", ft_strerror(ft_errno_get()));
+	}
+	return (ft_errno_get());
+}
diff --git a/src/ft_errno.h b/src/ft_errno.h
new file mode 100644
index 0000000..80a6076
--- /dev/null
+++ b/src/ft_errno.h
@@ -0,0 +1,29 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_errno.h                                         :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: khais <marvin@42.fr>                       +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/02/19 12:53/30 by khais             #+#    #+#             */
+/*   Updated: 2025/02/19 12:53:30 by khais            ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#ifndef FT_ERRNO_H
+# define FT_ERRNO_H
+
+typedef enum e_errno
+{
+	FT_EERRNO		= -2,
+	FT_EGET			= -1,
+	FT_ESUCCESS		= 0,
+	FT_EMAXERRNO,
+}	t_errno;
+
+t_errno		ft_errno(t_errno errno);
+t_errno		ft_errno_get(void);
+char		*ft_strerror(t_errno errno);
+t_errno		ft_perror(char *desc);
+
+#endif