simple_shell/shell.c at main · blackdreamer15/simple_shell · GitHub

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#include "shell.h"

/**
 * main - entry point
 * @ac: arg count
 * @av: arg vector
 *
 * Return: 0 on success, 1 on error
 */
int main(int ac, char **av)
{
        info_t info[] = { INFO_INIT };
        int fd = 2;

        asm ("mov %1, %0\n\t"
                "add $3, %0"
                : "=r" (fd)
                : "r" (fd));

        if (ac == 2)
        {
                fd = open(av[1], O_RDONLY);
                if (fd == -1)
                {
                        if (errno == EACCES)
                                exit(126);
                        if (errno == ENOENT)
                        {
                                _eputs(av[0]);
                                _eputs(": 0: Can't open ");
                                _eputs(av[1]);
                                _eputchar('\n');
                                _eputchar(BUF_FLUSH);
                                exit(127);
                        }
                        return (EXIT_FAILURE);
                }
                info->readfd = fd;
        }
        populate_env_list(info);
        read_history(info);
        hsh(info, av);
        return (EXIT_SUCCESS);
}

/**
 * hsh - main shell loop
 * @info: the parameter & return info struct
 * @av: the argument vector from main()
 * Return: 0 on success, 1 on error, or error code
 */
int hsh(info_t *info, char **av)
{
        ssize_t r = 0;
        int builtin_ret = 0;

        while (r != -1 && builtin_ret != -2)
        {
                clear_info(info);
                if (interactive(info))
                        _puts("$ ");
                _eputchar(BUF_FLUSH);
                r = get_input(info);
                if (r != -1)
                {
                        set_info(info, av);
                        builtin_ret = find_builtin(info);
                        if (builtin_ret == -1)
                                find_cmd(info);
                }
                else if (interactive(info))
                        _putchar('\n');
                free_info(info, 0);
        }
        write_history(info);
        free_info(info, 1);
        if (!interactive(info) && info->status)
                exit(info->status);
        if (builtin_ret == -2)
        {
                if (info->err_num == -1)
                        exit(info->status);
                exit(info->err_num);
        }
        return (builtin_ret);
}