main.c

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   main.c                                             :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: tgrekov <tgrekov@student.hive.fi>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/04/02 13:59:01 by tgrekov           #+#    #+#             */
/*   Updated: 2024/05/20 12:27:07 by tgrekov          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include "../mandatory/utils/utils.h"
#include <libft.h>
#include <ft_printf.h>
 
int     here_doc(char *limiter, int *in_out);
char    **get_paths(char **envp);
int     dispatcher(int n, char ***str_arrs, int *in_out);
 
static void _input(int argc, char **argv, int *is_here_doc, int *trunc_append)
{
    *is_here_doc = 0;
    *trunc_append = O_TRUNC;
    if (argv[1] && !ft_strncmp("here_doc", argv[1], 8))
    {
        *is_here_doc = 1;
        *trunc_append = O_APPEND;
    }
    if (argc < (5 + *is_here_doc))
    {
        ft_printf("%>Too few arguments: %d. Expected %d+\n",
            2, argc - 1, 4 + *is_here_doc);
        exit(1);
    }
}
 
static int  _open(char *name, int flags, int mode)
{
    int fd;
 
    fd = open(name, flags, mode);
    if (fd == -1)
        ft_printf("%>Failed to open \"%s\": %s\n", 2, name, strerror(errno));
    return (fd);
}
 
int main(int argc, char **argv, char **envp)
{
    char    **paths;
    int     in_out[2];
    int     status;
    int     is_here_doc;
    int     trunc_append;
 
    _input(argc, argv, &is_here_doc, &trunc_append);
    in_out[1] = _open(argv[argc - 1], O_WRONLY | O_CREAT | trunc_append,
            S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
    if (!is_here_doc)
        in_out[0] = _open(argv[1], O_RDONLY, 0);
    else if (!here_doc(argv[2], in_out))
        return (1);
    paths = get_paths(envp);
    status = dispatcher(argc - 3 - is_here_doc,
            (char **[]){paths, argv + 2 + is_here_doc, envp}, in_out);
    arr_free((void **) paths);
    return (status);
}