export.c

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   export.c                                           :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: dmdemirk <dmdemirk@student.42london.c      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/06/17 11:10:52 by dmdemirk          #+#    #+#             */
/*   Updated: 2024/09/09 13:12:35 by dmdemirk         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include "env.h"
#include "libft.h"
#include <stdlib.h>
#include "shell.h"
#include <stdio.h>
#include "exit_status.h"
 
/*
Functionalities:
- If no arguments are passed or "-p", print all environment variables
- If arguments are passed, set the environment variables
 */
 
int             builtin_export(t_ms_data *data);
static void     print_env(t_env *env);
static void     add_env(t_ms_data *data);
 
int builtin_export(t_ms_data *data)
{
    if (data->args == NULL || data->args[1] == NULL)
    {
        print_env(data->envp);
        return (EXIT_SUCCESS);
    }
    if (ft_strcmp(data->args[1], "-p") != 0 && data->args[1][0] == '-')
    {
        exit_status_handler(data, INVALID_OPTION, \
                ft_strjoin("export: ", data->args[1]));
        ft_putendl_fd("export: usage: export [-p]" \
                "[name[=value] ...] or export -p", STDERR_FILENO);
        return (INVALID_OPTION);
    }
    else if (ft_strcmp(data->args[1], "-p") == 0)
    {
        print_env(data->envp);
        return (EXIT_SUCCESS);
    }
    add_env(data);
    return (EXIT_SUCCESS);
}
 
static void print_env(t_env *env)
{
    t_env   *curr_node;
 
    curr_node = env;
    while (curr_node)
    {
        if (!ft_strcmp(curr_node->value, ""))
            ft_printf("declare -x %s\n", curr_node->key);
        else
            ft_printf("declare -x %s=\"%s\"\n", \
                curr_node->key, curr_node->value);
        curr_node = curr_node->next;
    }
}
 
static void add_env(t_ms_data *data)
{
    int     i;
    char    *key;
    char    *curr_arg;
 
    i = 0;
    key = NULL;
    curr_arg = NULL;
    while (data->args[++i])
    {
        if (ft_strchr(data->args[i], '='))
        {
            curr_arg = data->args[i];
            key = ft_strcdup(curr_arg, '=');
            set_env(&data->envp, key, \
                    ft_strchr(curr_arg, '=') + 1);
            free(key);
        }
        else
        {
            curr_arg = data->args[i];
            key = curr_arg;
            set_env(&data->envp, key, "");
        }
    }
}